CN113188409A - Dimension detection device and dimension detection method for O-shaped groove in straight hole - Google Patents

Abstract

The invention discloses a size detection device and a size detection method for an O-shaped groove in a straight hole, belonging to the technical field of casting detection. The size detection device for the O-shaped groove in the straight hole is simple in structure and convenient and fast to assemble and test, can accurately detect the size of the O-shaped groove in the straight hole on the workpiece, improves the efficiency and accuracy of workpiece detection, reduces the test cost introduced by the size detection of the O-shaped groove in the straight hole, provides a basis for the forming control of the workpiece, reduces the reject ratio and rejection rate of the workpiece, and has good practical value and application prospect.

Description

Dimension detection device and dimension detection method for O-shaped groove in straight hole

Technical Field

The invention belongs to the technical field of casting detection, and particularly relates to a size detection device and a size detection method for an O-shaped groove in a straight hole.

Background

The die-casting molding is a molding technology which is widely applied and plays an important role in the industries of automobile part manufacturing and the like. The formation of O-grooves in straight holes is often encountered during the preparation or machining of cast parts, as shown in figures 3 and 4.

In order to ensure that the size of the O-shaped groove in the straight hole meets the requirements of a drawing process in the manufacturing or processing process of a product, the size of the O-shaped groove in a casting product is required to be subjected to on-site sampling inspection or batch inspection so as to ensure that the size of the O-shaped groove meets the requirements.

In the prior art, the dimension detection of parts is generally carried out by adopting tools such as a micrometer, a caliper gauge, a height gauge and the like, and although the modes can meet the dimension test requirement of a conventional structure to a certain extent, the modes cannot be fully applied to the dimension detection of the O-shaped slotted hole in the straight hole. Because the sizes of the straight hole and the O-shaped groove in the straight hole are smaller, the conventional detection tool cannot be effectively applied. Although the size of the O-shaped groove in the straight hole can be detected by adopting the three-coordinate detection machine in the prior art, the size of the hole groove is small, the conventional three-coordinate detection machine cannot accurately pick points, so that the size detection of the O-shaped groove in the straight hole cannot be rapidly completed, and particularly, the requirement of detection cannot be met when batch acceptance is carried out. In addition, the three-coordinate detecting machine has high detection cost and low detection efficiency, and cannot be effectively applied to a production field at all.

Disclosure of Invention

Aiming at one or more of the defects or the improvement requirements in the prior art, the invention provides a device and a method for detecting the size of an O-shaped groove in a straight hole, which can quickly realize the size detection of the O-shaped groove in the straight hole and ensure the efficiency and the precision of the size detection of the O-shaped groove in the straight hole.

In order to achieve the above object, according to one aspect of the present invention, there is provided a dimension detecting apparatus for an O-shaped groove in a straight hole, comprising a diameter detecting member;

the diameter detection assembly comprises a detection sleeve, a detection pin and a detection unit;

the detection sleeve is of a cylindrical structure which can be embedded into a straight hole of a workpiece, a containing hole is axially formed in the middle of the detection sleeve, and detection holes penetrating through the containing hole are formed in pairs on the periphery of one end of the detection sleeve; the two detection holes are respectively formed along the radial direction of the containing hole and are coaxially arranged;

the detection pin comprises a pin body and a conical part which are coaxially arranged; one end of the pin body is coaxially matched in the accommodating hole and can reciprocate along the axial direction of the accommodating hole; the tapered part is arranged at the end part of the pin body extending into the accommodating hole, and the outer diameter of the tapered part is sequentially reduced from one end connected with the pin body to the other end;

the detection units are arranged in pairs and comprise detection heads which are coaxially embedded in the corresponding detection holes; one end of the detection head extends into the accommodating hole and can be abutted against the periphery of the conical part under the axial movement of the detection pin, so that the detection head can move axially under the driving of the conical part; and the detection unit is provided with an elastic piece corresponding to the detection head and used for providing restoring force pointing to the accommodating hole for the detection head so as to realize the retraction of the detection head after the detection head is released from being abutted against the conical part.

As a further improvement of the invention, the detection head comprises a large-diameter end and a small-diameter end which are coaxially arranged, and an annular step is formed at the joint of the large-diameter end and the small-diameter end; the large-diameter end extends into the accommodating hole and is used for abutting and matching with the periphery of the conical part;

the elastic piece is a spring and is sleeved on the periphery of the small-diameter end, one end of the elastic piece is limited in the detection hole, and the other end of the elastic piece is abutted to the annular step.

As a further improvement of the invention, a handle is coaxially arranged at one end of the pin body, which is far away from the conical part, and an annular step is formed at the connecting position of the handle and the pin body.

As a further improvement of the invention, a notch penetrating through the inside and outside of the detection sleeve is formed at the end part of the detection sleeve deviating from the detection hole, and is used for judging the position of the pin body in the detection sleeve through the notch.

As a further improvement of the invention, the pin body and the detection sleeve are matched by a thread or a sliding clearance.

As a further improvement of the invention, a gasket groove is arranged on the periphery of the detection sleeve corresponding to the detection hole, and a gasket is correspondingly arranged;

the gasket is provided with a through hole for the small-diameter end to pass through and can be fixed in the gasket groove after being embedded in the gasket groove; one end of the spring, which is far away from the large-diameter end, abuts against the gasket.

As a further improvement of the invention, the height detection device also comprises a height detection assembly, wherein the height detection assembly comprises an indicating meter and a meter seat;

the indicating meter is fixed on the meter seat and is provided with a telescopic shaft capable of stretching back and forth; one end of the telescopic shaft is matched with the indicating gauge, the other end of the telescopic shaft vertically penetrates through the gauge seat and then extends along the axial direction, and a special-shaped gauge outfit which can extend into the O-shaped groove is arranged at the end part of the telescopic shaft, which deviates from the indicating gauge.

In another aspect of the present invention, a method for detecting the size of an O-shaped groove in a straight hole is provided, which is implemented by using a device for detecting the size of an O-shaped groove in a straight hole, which includes a diameter detection component, and the detection process includes a diameter detection process of the O-shaped groove, and includes the following steps:

(1) placing a workpiece on a workbench, and exposing a to-be-tested straight hole on the workpiece;

(2) correspondingly assembling the diameter detection assembly and then embedding the diameter detection assembly into the straight hole to be detected, so that the end part of the detection head is aligned to the annular side wall of the O-shaped groove;

(3) the detection pin is driven to move in the detection sleeve, so that the conical part is simultaneously abutted against the two detection heads by the periphery of the conical part and is synchronously pushed outwards until the end parts of the two detection heads are respectively abutted against the circumferential side wall of the O-shaped groove;

(4) and observing the axial movement distance of the detection pin, converting the axial movement distance into the axial movement distance of the detection head, and further judging whether the diameter of the O-shaped groove meets the processing requirement.

In another aspect of the present invention, a method for detecting the size of an O-shaped groove in a straight hole is provided, which is implemented by using a device for detecting the size of an O-shaped groove in a straight hole, the device comprising a diameter detection component and a height detection component, wherein the detection process comprises a height detection process of the O-shaped groove and a diameter detection process of the O-shaped groove, and the height detection process comprises the steps of:

(1) placing a workpiece on a workbench, and exposing a to-be-tested straight hole on the workpiece;

(2) correspondingly assembling the height detection assembly and then matching the height detection assembly on the workpiece, so that the bottom surface of the gauge stand is abutted against the surface of the workpiece, and the telescopic shaft with the special-shaped gauge head extends into the straight hole;

(3) adjusting the telescopic shaft to enable the special-shaped gauge outfit to extend into the O-shaped groove and be positioned between the upper wall surface and the lower wall surface of the O-shaped groove;

(4) and controlling the telescopic shaft to stretch along the axial direction of the telescopic shaft, enabling the special-shaped gauge head to successively abut against the upper wall surface and the lower wall surface of the O-shaped groove, and respectively recording the numerical value of the indicating gauge when the special-shaped gauge head abuts against the upper wall surface and the lower wall surface of the O-shaped groove twice, so that the height of the O-shaped groove is detected, and whether the machining height of the O-shaped groove meets the requirement is judged.

As a further improvement of the present invention, the diameter detection process comprises the steps of:

(1) placing a workpiece on a workbench, and exposing a to-be-tested straight hole on the workpiece;

(2) correspondingly assembling the diameter detection assembly and then embedding the diameter detection assembly into the straight hole to be detected, so that the end part of the detection head is aligned to the annular side wall of the O-shaped groove;

(3) the detection pin is driven to move in the detection sleeve, so that the conical part is simultaneously abutted against the two detection heads by the periphery of the conical part and is synchronously pushed outwards until the end parts of the two detection heads are respectively abutted against the circumferential side wall of the O-shaped groove;

(4) and observing the axial movement distance of the detection pin, converting the axial movement distance into the axial movement distance of the detection head, and further judging whether the diameter of the O-shaped groove meets the processing requirement.

The above-described improved technical features may be combined with each other as long as they do not conflict with each other.

Generally, compared with the prior art, the technical scheme conceived by the invention has the following beneficial effects:

(1) according to the size detection device for the O-shaped groove in the straight hole, the diameter detection assembly is arranged, the conversion from axial movement of the detection pin to axial movement of the detection head can be realized by utilizing the corresponding matching between the detection pin and the detection sleeve, between the detection unit and the detection pin and between the two detection units in the diameter detection assembly, then the two detection units are coaxially arranged along the radial direction of the accommodating hole, the movement distance of the detection head can be quickly calculated through the pythagorean theorem, the diameter of the O-shaped groove can be quickly detected by combining the size of each assembly, whether the diameter processing requirement of the O-shaped groove in the straight hole of a workpiece is met or not is determined, the whole process is simple and convenient, the efficiency and the accuracy of diameter detection of the O-shaped groove are effectively improved, and the cost and the difficulty of size detection of the O-shaped groove are reduced;

(2) according to the size detection device for the O-shaped groove in the straight hole, the detection head can accurately complete matching with the conical part through the corresponding arrangement of the detection head in the detection assembly, the detection head can quickly retract into the detection hole after the conical part releases pushing and pressing on the detection head, guarantee is provided for taking out the diameter detection assembly from the straight hole, and batch detection of the O-shaped grooves can be stably carried out;

(3) according to the size detection device for the O-shaped groove in the straight hole, the height detection assembly is arranged, and the corresponding arrangement of the parts such as the indicating meter, the meter seat, the special-shaped meter head and the like is utilized, so that the indicating meter can quickly detect the distance between the upper wall surface and the lower wall surface of the O-shaped groove, the height of the O-shaped groove is further quickly detected, whether the machining height of the O-shaped groove meets the requirement of actual forming or not is judged, the rejection rate and the reject ratio of workpieces are further reduced, and the production and application cost of castings is reduced;

(4) the method for detecting the size of the O-shaped groove in the straight hole has the advantages of simple operation steps and convenient and fast detection process, can quickly and accurately realize the size detection of the O-shaped groove, effectively makes up for the defects of the existing detection device or detection method, simplifies the detection process of the O-shaped groove, improves the detection efficiency of the O-shaped groove, and reduces the labor cost and equipment cost for the size detection of the O-shaped groove;

(5) the size detection device for the O-shaped groove in the straight hole is simple in structure and convenient and fast to assemble and test, can accurately detect the size of the O-shaped groove in the straight hole on the workpiece, improves the efficiency and accuracy of workpiece detection, reduces the test cost introduced by the size detection of the O-shaped groove in the straight hole, provides a basis for the forming control of the workpiece, reduces the reject ratio and rejection rate of the workpiece, and has good practical value and application prospect.

Drawings

FIG. 1 is a schematic view of a diameter detection assembly for detecting the diameter of an O-shaped groove in a straight hole according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a height detection assembly for detecting the height of an O-shaped groove in a straight hole according to an embodiment of the present invention;

FIGS. 3 and 4 are schematic structural views of two workpieces with O-shaped grooves in straight holes according to embodiments of the present invention;

FIG. 5 is a schematic view of a diameter detecting assembly of the size detecting apparatus according to the embodiment of the present invention;

FIG. 6 is a front view of a detection sleeve structure of a diameter detection assembly in an embodiment of the present invention;

FIG. 7 is a cross-sectional view of the test sheath configuration A-A of the diameter test assembly in an embodiment of the present invention;

FIG. 8 is a schematic view of a pin configuration of a diameter sensing assembly in an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a detecting unit of the diameter detecting assembly according to the embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a special-shaped gauge head of the height detection assembly in the embodiment of the present invention;

in all the figures, the same reference numerals denote the same features, in particular:

1. a diameter detection assembly; 2. a height detection assembly; 3. a workpiece;

101. a detection sleeve; 102. a detection pin; 103. a detection unit; 104. a gasket; 1011. a notch; 1012. a detection hole; 1013. a gasket groove; 1021. a pin body; 1022. a handle; 1023. a tapered portion; 1031. a detection head; 1032. a spring;

201. an indication table; 202. a gauge stand; 203. a special-shaped gauge outfit; 301. a straight hole; 302. an O-shaped groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example (b):

referring to fig. 1 and 2, a size detection apparatus for an O-groove in a straight hole according to a preferred embodiment of the present invention includes adiameter detection assembly 1 and aheight detection assembly 2. Thediameter detection assembly 1 can be used for rapidly detecting the diameter size of the O-shaped groove in the straight hole and judging whether the O-shapedgroove 302 of theworkpiece 3 meets the design diameter; accordingly, whether the O-shapedgroove 302 of theworkpiece 3 satisfies the design height can be quickly detected by theheight detection assembly 2. In practical arrangement, theworkpiece 3 to be detected has two forms, as shown in fig. 3 and 4, the difference between the two forms is whether the inner diameters of thestraight holes 301 on both sides of the O-shapedgroove 302 in the axial direction are the same, and the size detection device in the preferred embodiment can reliably complete the detection work for twodifferent workpieces 3.

Specifically, thediameter sensing assembly 1 in the preferred embodiment is shown in FIGS. 5-9, and includes asensing sleeve 101, asensing pin 102, and asensing unit 103. In a preferred embodiment, the detectingsleeve 101 is a circular tube-shaped structure, a through hole penetrating through two end faces is formed in the middle of the detecting sleeve along the axial direction, and the detectingpin 102 is coaxially arranged in the through hole.

Obviously, the outer circumference of the detectingsleeve 101 corresponds to the cross section of thestraight hole 301 on theworkpiece 3, and if thestraight hole 301 is a square hole, the detectingsleeve 101 may be provided with a square cylindrical structure, or still be provided with a cylindrical structure, as long as it can be correspondingly inserted into thestraight hole 301. Meanwhile, the hole formed in the middle of thedetection sleeve 101 may be a through hole or a blind hole, as long as thedetection pin 102 can be accommodated, that is, the hole formed in the middle of thedetection sleeve 101 is an accommodating hole for thedetection pin 102.

Furthermore, at least one pair ofdetection holes 1012 penetrating through the inner through hole of thedetection sleeve 101 is formed on the outer peripheral wall surface of thedetection sleeve 101 near the bottom, and is used for correspondingly accommodating thedetection unit 103. The twodetection holes 1012 arranged in pairs are coaxially arranged, and the axes thereof intersect and are perpendicular to the axis of thedetection sleeve 101. Accordingly,gasket grooves 1013 with a certain depth are respectively formed on the outer circumference of thedetection sleeve 101 corresponding to eachdetection hole 1012 for correspondingly accommodating thegasket 104, so as to ensure that thegasket 104 does not protrude from the outer circumferential wall surface of thedetection sleeve 101 after thegasket 104 encapsulates thedetection unit 103.

The detectingpin 102 in the preferred embodiment is shown in fig. 8, and preferably has a three-segment structure, and includes ahandle 1022, apin body 1021, and a taperedportion 1023 coaxially arranged in sequence in the axial direction, wherein thehandle 1022 and thepin body 1021 are in the form of a stepped shaft, the outer diameter of thehandle 1022 is smaller than that of thepin body 1021, and an annular step structure is formed at the junction of the two. Meanwhile, the taperedportion 1023 is disposed on the side of thepin body 1021 facing away from thehandle 1022, and the outer diameter thereof is gradually reduced from the side of thepin body 1021 to the other side, forming a smooth tapered structure. Accordingly, the outer diameter of thepin body 1021 matches the inner diameter of the through hole in the middle of thedetection sleeve 101, so that thepin body 1021 can be coaxially matched in thedetection sleeve 101 and reciprocated in the axial direction.

In a preferred embodiment, thepin 1021 and thedetection sleeve 101 are connected through matching threads, that is, by rotating thepin 1021, thepin 1021 can be displaced in the axial direction of thedetection sleeve 101. Obviously, the above matching mode is not the only matching mode of thedetection pin 102 and thedetection sleeve 101, and the two modes can be completely arranged in a clearance matching mode, namely, the relative position of the two modes can be changed by pressing or lifting thedetection pin 102. In order to improve the rotation efficiency of thepin body 1021, a knurling process is performed on the outer circumference of thehandle 1022.

As shown in fig. 9, the detectingunit 103 in the preferred embodiment includes a detectinghead 1031 in a "T shape" and aspring 1032 coaxially fitted on the outer circumference of the detectinghead 1031. Wherein, detecthead 1031 and include coaxial big footpath end and the path end that sets up, and the junction between the two forms annular step, and the periphery of the path end thatspring 1032 cover was established to with its one end butt or connect on annular step. In actual installation, the outer diameter of thespring 1032 is preferably not larger than the outer diameter of the large diameter end, and further preferably the same, and both ends of thedetection head 1031 are preferably provided in a round head form, respectively, to reduce the friction force when abutting against the corresponding component.

Accordingly, thegasket 104 of the preferred embodiment is provided with a through hole corresponding to the small diameter end of thedetection head 1031, so that the small diameter end of thedetection head 1031 can just penetrate through thegasket 104 to protrude outwards, as shown in fig. 5. Then, the detectingunit 103 is coaxially inserted into the detectinghole 1012, and the large diameter end of the detectinghead 1031 extends into the middle through hole of the detectingsleeve 101, i.e. the two opposite detectingheads 1031 are arranged with the end portions of the large diameter end facing each other. Meanwhile, thegasket 104 is connected in thegasket groove 1013 by a plurality of connecting members, thereby enclosing the detectingunit 103 in the detectinghole 1012. At this time, the small diameter end of thedetection head 1031 passes through the through hole on thepad 104, and the end of thespring 1032 facing away from the large diameter end abuts on thepad 104.

It is understood that, in actual implementation, the elastic member disposed for thedetection head 1031 may be disposed in other forms besides thespring 1032, for example, a rubber ring or other forms of elastic structures are sleeved on the outer circumference of the small diameter end of thedetection head 1031, and the disposition of thepad 104 may be eliminated by disposing thedetection hole 1012 in the form of a stepped hole.

As shown in fig. 5, the taperedportion 1023 of thedetection pin 102 in the preferred embodiment is provided corresponding to thedetection unit 103 arranged in pairs, which can abut against the large diameter ends of the twodetection heads 1031 after being inserted into the through hole in the middle of thedetection sleeve 101. Then, as thedetection pin 102 moves in the axial direction, the position where the taperedportion 1023 abuts against the twodetection heads 1031 changes, causing the twodetection heads 1031 to be pushed out against the pressing force of thesprings 1032 or to be pushed in by the pressing force of thesprings 1032.

By the abutting matching between thedetection pin 102 and thedetection head 1031, the switching of the axial movement of thedetection pin 102 to the axial movement of thedetection head 1031, that is, the switching from the vertical movement to the horizontal movement as in fig. 5, can be realized. The extrusion of thedetection head 1031 may then be achieved by detecting the movement of thepin 102. The small-diameter end of thehead 1031 to be detected abuts against the inner peripheral wall surface of the O-shapedgroove 302, so that the diameter of the O-shapedgroove 302 can be determined by detecting the movement length of thepin 102, and the detection of the diameter of the O-shapedgroove 302 is completed, as shown in fig. 1.

In order to quickly determine whether the diameter of theworkpiece 3 meets the processing requirement, in a preferred embodiment, anotch 1011 with a certain length is formed at an end of thedetection sleeve 101 away from thedetection unit 103, and thenotch 1011 extends axially from an end surface of thedetection sleeve 101 and penetrates through inner and outer wall surfaces of thedetection sleeve 101, so that a detection person can quickly see a step position at the top of the detection pin 102 (i.e., a connection position between thehandle 1022 and the pin body 1021) through thenotch 1011. Through the length of seting up ofbreach 1011 and the tapering oftoper portion 1023, detect the length ofhead 1031 and the diameter range ofO type groove 302 and correspond the setting, can ensure to support when detectinground pin 102 and detecthead 1031, and when the top step that detectsround pin 102 was inbreach 1011 and sets up the within range,O type groove 302 diameter satisfied demand, otherwise, the processing ofO type groove 302 is not conform to the requirement to this can judge fast whether the diameter ofO type groove 302 is in the accuracy within range.

In addition, in order to ensure that thediameter detecting assembly 1 can work normally on theworkpiece 3, in actual installation, the outer diameter of the detectingsleeve 101 cannot be larger than the maximum inner diameter of thestraight hole 301, and the length of the detectinghead 1031 cannot be larger than the maximum radius of thestraight hole 301.

It is understood that the length of thedetection head 1031 and thedetection pin 102 may be optimized according to actual needs, and the inclination angle of the periphery of the taperedportion 1023 may also be optimized according to actual needs. In a preferred embodiment, the angle of inclination of the outer periphery of the taperedportion 1023 with respect to the axis of thepin body 1021 is preferably 15 ° to 75 °, and more preferably 45 ° or 60 °. It is not difficult to find according to the pythagorean theorem that the distance by which thedetection head 1031 is driven when the axial moving unit distance of thedetection pin 102 is adjusted correspondingly by changing the taper of the taperedportion 1023. For example, if the taper of thedetection pin 102 is 45 °, thedetection pin 102 will move a unit distance in the axial direction, and thedetection head 1031 will also move a unit distance in its own axial direction.

Further, as shown in fig. 2, 10, theheight detection assembly 2 in the preferred embodiment includes an indicatinggauge 201, agauge stand 202, and ashaped gauge head 203. The indicatingmeter 201 is fixed on themeter base 202, a telescopic shaft vertically penetrating through themeter base 202 is arranged on the indicatingmeter 201, and the indicating numerical value on the indicatingmeter 201 can be correspondingly changed through the axial extension and contraction of the telescopic shaft. Meanwhile, the special-shapedgauge head 203 is in an "L" shape, one end of which is connected with the end of the telescopic shaft passing through thegauge stand 202, and the other end of which horizontally extends out, as shown in fig. 2.

Through the corresponding setting ofheight detection subassembly 2, can realize the detection ofO type groove 302 axial length, accomplish height detection promptly. During actual measurement, thegauge stand 202 is fixed on the surface of theworkpiece 3, the telescopic shaft with the special-shapedgauge head 203 extends into thestraight hole 301, the special-shapedgauge head 203 is aligned with the O-shapedgroove 302, the position of thegauge stand 202 is moved through horizontal movement, the extending end of the special-shapedgauge head 203 extends into the position between the upper wall surface and the lower wall surface of the O-shapedgroove 302, the numerical value when the special-shapedgauge head 203 abuts against the upper wall surface and the lower wall surface of the O-shapedgroove 302 is measured through the indicatingmeter 201, and the height value of the O-shapedgroove 302 can be calculated.

For the size detection device in the preferred embodiment, the process of detecting the diameter of the O-shaped groove is as follows:

(1) placing theworkpiece 3 on a workbench to expose thestraight hole 301 to be tested, preferably enabling the axis of thestraight hole 301 to be vertically arranged and the end with the larger inner diameter of thestraight hole 301 to face upwards;

(2) correspondingly assembling thediameter detection assembly 1 and then embedding the assembly into astraight hole 301 to be detected, so that the end part of thedetection head 1031 is aligned to the annular side wall of the O-shapedgroove 302;

(3) thedetection pin 102 is rotated by screwing thehandle 1022, so that thetapered part 1023 moves to one side close to thedetection unit 103, and the periphery of thetapered part 1023 abuts against thedetection head 1031 and then is pushed outwards until the end part of the small-diameter end of thedetection head 1031 abuts against the circumferential side wall of the O-shapedgroove 302;

(4) observing the position of the top step on thedetection pin 102, and if the position is just in the opening interval of thenotch 1011, judging that the diameter of the O-shapedgroove 302 meets the processing requirement; if the top step is not located in the opening section of thenotch 1011, the diameter of the O-shapedgroove 302 is judged not to meet the processing requirement.

Accordingly, when the height of the O-groove 302 is detected, the procedure is preferably as follows:

(1) placing theworkpiece 3 on a workbench so that the axis of thestraight hole 301 is vertically arranged;

(2) correspondingly assembling theheight detection assembly 2 and then matching the height detection assembly at a position to be detected, so that thegauge stand 202 is stably supported on the top surface of theworkpiece 3, and the telescopic shaft with the special-shapedgauge head 203 extends into thestraight hole 301;

(3) vertically adjusting the telescopic shaft to ensure that the extending end of the special-shapedgauge head 203 is aligned with the circumferential wall surface of the O-shapedgroove 302; then, horizontally adjusting the position of the gauge stand 202 to enable the extending end to extend into the space between the upper wall surface and the lower wall surface of the O-shapedgroove 302;

(4) the telescopic shaft is controlled to stretch vertically, so that the extending end of the special-shapedgauge head 203 is successively abutted against the upper wall surface and the lower wall surface of the O-shapedgroove 302, the numerical value of the indicatinggauge 201 during two times of abutting is recorded respectively, the height of the O-shapedgroove 302 is detected, and then the height is compared with a design value to judge whether the machining height of the O-shapedgroove 302 meets the requirement.

The size detection device for the O-shaped groove in the straight hole is simple in structure and convenient and fast to assemble and test, can accurately detect the size of the O-shaped groove in the straight hole on the workpiece, improves the efficiency and accuracy of workpiece detection, reduces the test cost introduced by the size detection of the O-shaped groove in the straight hole, provides a basis for the forming control of the workpiece, reduces the reject ratio and rejection rate of the workpiece, and has good practical value and application prospect.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A size detection device for an O-shaped groove in a straight hole is characterized by comprising a diameter detection assembly;

the diameter detection assembly comprises a detection sleeve, a detection pin and a detection unit;

the detection sleeve is of a cylindrical structure which can be embedded into a straight hole of a workpiece, a containing hole is axially formed in the middle of the detection sleeve, and detection holes penetrating through the containing hole are formed in pairs on the periphery of one end of the detection sleeve; the two detection holes are respectively formed along the radial direction of the containing hole and are coaxially arranged;

the detection pin comprises a pin body and a conical part which are coaxially arranged; one end of the pin body is coaxially matched in the accommodating hole and can reciprocate along the axial direction of the accommodating hole; the tapered part is arranged at the end part of the pin body extending into the accommodating hole, and the outer diameter of the tapered part is sequentially reduced from one end connected with the pin body to the other end;

the detection units are arranged in pairs and comprise detection heads which are coaxially embedded in the corresponding detection holes; one end of the detection head extends into the accommodating hole and can be abutted against the periphery of the conical part under the axial movement of the detection pin, so that the detection head can move axially under the driving of the conical part; and the detection unit is provided with an elastic piece corresponding to the detection head and used for providing restoring force pointing to the accommodating hole for the detection head so as to realize the retraction of the detection head after the detection head is released from being abutted against the conical part.

2. The device for detecting the size of the O-shaped groove in the straight hole according to claim 1, wherein the detection head comprises a large-diameter end and a small-diameter end which are coaxially arranged, and an annular step is formed at the joint of the large-diameter end and the small-diameter end; the large-diameter end extends into the accommodating hole and is used for abutting and matching with the periphery of the conical part;

the elastic piece is a spring and is sleeved on the periphery of the small-diameter end, one end of the elastic piece is limited in the detection hole, and the other end of the elastic piece is abutted to the annular step.

3. The device for detecting the size of the O-shaped groove in the straight hole as claimed in claim 1 or 2, wherein a handle is coaxially arranged at one end of the pin body, which is far away from the tapered part, and an annular step is formed at the connecting position of the handle and the pin body.

4. The device for detecting the size of the O-shaped groove in the straight hole as claimed in claim 1, wherein a notch penetrating through the inside and outside of the detection sleeve is formed at the end of the detection sleeve away from the detection hole, and the position of the pin body in the detection sleeve is judged through the notch.

5. The device for detecting the size of the O-shaped groove in the straight hole as claimed in claim 1, wherein the pin body and the detection sleeve are matched through threads or sliding gaps.

6. The device for detecting the size of the O-shaped groove in the straight hole as claimed in claim 2, wherein a gasket groove is formed on the periphery of the detection sleeve corresponding to the detection hole, and a gasket is correspondingly arranged;

the gasket is provided with a through hole for the small-diameter end to pass through and can be fixed in the gasket groove after being embedded in the gasket groove; one end of the spring, which is far away from the large-diameter end, abuts against the gasket.

7. The device for detecting the size of the O-shaped groove in the straight hole according to any one of claims 1 to 6, further comprising a height detection assembly, wherein the height detection assembly comprises an indicating gauge and a gauge stand;

the indicating meter is fixed on the meter seat and is provided with a telescopic shaft capable of stretching back and forth; one end of the telescopic shaft is matched with the indicating gauge, the other end of the telescopic shaft vertically penetrates through the gauge seat and then extends along the axial direction, and a special-shaped gauge outfit which can extend into the O-shaped groove is arranged at the end part of the telescopic shaft, which deviates from the indicating gauge.

8. A method for detecting the size of an O-shaped groove in a straight hole is realized by using the device for detecting the size of the O-shaped groove in the straight hole, which is disclosed by any one of claims 1-6, wherein the detection process comprises the diameter detection process of the O-shaped groove, and the method comprises the following steps:

(1) placing a workpiece on a workbench, and exposing a to-be-tested straight hole on the workpiece;

(2) correspondingly assembling the diameter detection assembly and then embedding the diameter detection assembly into the straight hole to be detected, so that the end part of the detection head is aligned to the annular side wall of the O-shaped groove;

(3) the detection pin is driven to move in the detection sleeve, so that the conical part is simultaneously abutted against the two detection heads by the periphery of the conical part and is synchronously pushed outwards until the end parts of the two detection heads are respectively abutted against the circumferential side wall of the O-shaped groove;

(4) and observing the axial movement distance of the detection pin, converting the axial movement distance into the axial movement distance of the detection head, and further judging whether the diameter of the O-shaped groove meets the processing requirement.

9. A method for detecting the size of an O-shaped groove in a straight hole, which is implemented by using the device for detecting the size of an O-shaped groove in a straight hole according to claim 7, wherein the detection process comprises a height detection process of the O-shaped groove and a diameter detection process of the O-shaped groove, and the height detection process comprises the following steps:

(1) placing a workpiece on a workbench, and exposing a to-be-tested straight hole on the workpiece;

(2) correspondingly assembling the height detection assembly and then matching the height detection assembly on the workpiece, so that the bottom surface of the gauge stand is abutted against the surface of the workpiece, and the telescopic shaft with the special-shaped gauge head extends into the straight hole;

(3) adjusting the telescopic shaft to enable the special-shaped gauge outfit to extend into the O-shaped groove and be positioned between the upper wall surface and the lower wall surface of the O-shaped groove;

(4) and controlling the telescopic shaft to stretch along the axial direction of the telescopic shaft, enabling the special-shaped gauge head to successively abut against the upper wall surface and the lower wall surface of the O-shaped groove, and respectively recording the numerical value of the indicating gauge when the special-shaped gauge head abuts against the upper wall surface and the lower wall surface of the O-shaped groove twice, so that the height of the O-shaped groove is detected, and whether the machining height of the O-shaped groove meets the requirement is judged.

10. The method for detecting the size of the O-shaped groove in the straight hole as claimed in claim 9, wherein the diameter detection process comprises the following steps:

(1) placing a workpiece on a workbench, and exposing a to-be-tested straight hole on the workpiece;

(2) correspondingly assembling the diameter detection assembly and then embedding the diameter detection assembly into the straight hole to be detected, so that the end part of the detection head is aligned to the annular side wall of the O-shaped groove;

(3) the detection pin is driven to move in the detection sleeve, so that the conical part is simultaneously abutted against the two detection heads by the periphery of the conical part and is synchronously pushed outwards until the end parts of the two detection heads are respectively abutted against the circumferential side wall of the O-shaped groove;

(4) and observing the axial movement distance of the detection pin, converting the axial movement distance into the axial movement distance of the detection head, and further judging whether the diameter of the O-shaped groove meets the processing requirement.

Images