CN113634997A

Movatterモバイル変換

Info

Publication number: CN113634997A
Application number: CN202110955305.8A
Authority: CN
Inventors: 刘海潮
Original assignee: Wuxi Geruisi Precision Machinery Co ltd
Current assignee: Wuxi Geruisi Precision Machinery Co ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2021-11-12
Anticipated expiration: 2041-08-19
Also published as: CN113634997B

Abstract

The invention discloses a shaft sleeve processing technology of an aircraft main wing unfolding device, which is applied to the field of shaft sleeve part processing technologies and solves the problems that when a blind hole is processed in the traditional processing technology, a wall breaking phenomenon occurs during drilling, and a drill bit is easy to break; the blind hole is difficult to grasp technical problem with the position size precision who leads to groove two and lead to groove three, and its technical scheme main points are: the method comprises the following steps: selecting a blank, roughly machining a first through hole and a second through hole by a lathe, carrying out heat treatment, grinding the outer circle, drilling a fourth blind hole by a milling machine, simultaneously machining a second through groove, machining a third through hole, and finely machining the dimensional tolerance required by the design drawings of the first through hole, the second through hole and the third through hole; machining a second through groove, a third through groove, a key groove and a pin shaft hole on the outer circumferential surface by a machining center according to the size and tolerance of a design drawing, and machining the first through groove by slow wire feeding; has the technical effects of reasonable sequence of processing procedures and improvement of the qualification rate of each size of parts.

Description

Processing technology for shaft sleeve of main wing unfolding device of aircraft

Technical Field

The invention relates to the field of shaft sleeve part machining processes, in particular to a shaft sleeve machining process of an aircraft main wing unfolding device.

Background

Various aircraft have wings to control the direction of flight. The aircraft is provided with the folding wings, the folding wings are opened when flying in the air, the device for controlling the unfolding of the folding wings has high technical requirements, and the process of parts is complex.

FIGS. 1 and 2 illustrate a key component sleeve of a deployment device, the sleeve being generally sleeve-shaped; the shaft sleeve is internally provided with three through holes which are coaxial with the shaft sleeve in appearance, the three through holes are communicated and sequentially comprise a through hole I1, a through hole II 2 and a through hole III 3 from bottom to top, and the diameter of the through hole II 2 is smaller than that of the through hole I1 and the through hole III 3; the upper end of the shaft sleeve is provided with a blind hole IV 4, the axis of the blind hole IV 4 is parallel to the axis of the shaft sleeve, and the blind hole IV 4 is communicated with the through hole III 3; two symmetrically arranged through grooves I5 are formed in the inner wall of the through hole II 2, and two ends of each through groove I5 are respectively communicated with the through hole I1 and the through hole III 3; the upper end of the shaft sleeve is provided with a second throughgroove 6 and a third throughgroove 7 which are crossed in a cross manner, and the width directions of the second throughgroove 6 and the third throughgroove 7 are symmetrical with respect to the radial direction of the shaft sleeve; the upper end of the shaft sleeve is provided with an internal thread 8, and the side wall of the shaft sleeve is provided with a plurality of pin shaft holes 9 andkey grooves 10.

The traditional processing technology is as follows: firstly, carrying out heat treatment, sequentially processing a first through hole, a second through hole and a third through hole, processing a fourth blind hole, processing a first through groove, a second through groove and a third through groove, and finally processing internal threads, pin shaft holes and key grooves.

Such conventional processes have problems in processing, such as: 1. when the fourth blind hole is machined, the fourth blind hole is communicated with the third through hole, so that a wall breaking phenomenon occurs during drilling, and a drill bit is easy to break; 2. the position and size precision of the blind hole, the through groove II and the through groove III are difficult to grasp.

Disclosure of Invention

The invention aims to provide a processing technology of a shaft sleeve of an aircraft main wing unfolding device, which has the advantages of reasonable processing procedure sequence and improvement of the qualification rate of parts in all dimensions.

The technical purpose of the invention is realized by the following technical scheme: a processing technology for shaft sleeves of main wing unfolding devices of aircrafts comprises the following steps:

(1) selecting a blank: selecting a blank bar stock with the size larger than the maximum outline dimension according to a design drawing;

(2) rough machining by a lathe: roughly processing the excircle and the end face, and reserving 1mm of allowance on the single face; roughly processing the first through hole and the second through hole, and reserving 1mm of allowance on the single surface;

(3) and (3) heat treatment: heat treatment hardness HRC 32-38;

(4) processing an outer circle by using an outer circle grinding machine, and reserving a margin of 0.5mm for the outer circle;

(5) a milling machine punches a blind hole IV and simultaneously processes a through groove II; the diameter of the blind hole IV is processed and formed at one time according to the size of a design drawing, and the depth is more than 1 mm; the second through groove is processed according to the allowance of 1mm on the single surface;

(6) roughly machining a third through hole by using a lathe, and reserving 1mm of allowance on a single surface;

(7) finish machining is carried out on the numerical control lathe, the through hole I, the through hole II and the through hole III are subjected to finish machining until the dimensional tolerance required by a design drawing is reached, the outer circle is subjected to finish machining, and 0.01 allowance is reserved for the outer circle; simultaneously processing internal threads and processing the length according to the tolerance requirement of a design drawing;

(8) the cylindrical grinding machine finely grinds the size of the outer circle to the size tolerance required by the design drawing;

(9) processing a second through groove and a third through groove by a processing center according to the size and tolerance of a design drawing;

(10) processing a key groove and a pin shaft hole on the outer circumferential surface by a processing center according to the size and the tolerance of a design drawing;

(11) and (4) processing two through grooves I by slow wire moving according to the drawing size and tolerance.

Through the technical scheme, allowance reserved in the steps (2), (4) and (5) can be used for facilitating subsequent finish machining better so as to improve the size precision; the blind hole IV is firstly processed, and then the through hole III is processed, so that the condition that the drill bit is broken due to wall breaking during drilling is better avoided; the grinding machining and the subsequent machining are carried out after the heat treatment, so that the size change condition caused by the heat treatment is better avoided, and the integral size precision is ensured; when the blind hole is machined in the fourth step, the through groove is machined in the second step, errors caused by secondary clamping are avoided well, and machining precision is further improved.

The invention is further configured to: and (3) adding a step (7.1) to detect one between the steps (7) and (8), detecting the concentricity, the step size and the total length by using the total number, and transferring to the step (8) after the detection is qualified.

Through the technical scheme, the size precision of the first through hole, the second through hole, the third through hole and the assembly can be well guaranteed, and the yield of products is improved.

The invention is further configured to: and (5) when the step (10) is carried out, clamping and positioning are carried out by using the second through groove and the third through groove through a clamp.

Through above-mentioned technical scheme, guarantee to lead to the relative position between groove two, lead to the groove three and the shape on the circumference, ensured position size precision.

The invention is further configured to: and (3) adding a step (12) of detecting two after the step (11), and carrying out full-size detection.

Through the technical scheme, the qualified rate of the size can be better guaranteed, and the yield of products is further improved.

The invention is further configured to: step (13) of blackening is added after step (11).

Through above-mentioned technical scheme, blackening and handling and make the axle sleeve surface form the oxidation film that the one deck is fine and close, isolated air that can be better prevents that the axle sleeve from rustting.

The invention is further configured to: and coating a protective film on the surface of the product after all processing is finished.

Through the technical scheme, the protective film can better separate the shaft sleeve from the external environment, and plays a certain role in protection.

The invention is further configured to: the protective film is a polyethylene film.

Through above-mentioned technical scheme, the polyethylene film has better tension, and dampproofing and waterproofing moreover, the outer surface of adhering to the axle sleeve that can be better avoids corrosive liquids and axle sleeve contact and the condition of corroding the axle sleeve.

The invention is further configured to: the appearance of the product is checked before being coated with the protective film, and the product is required to be black, uniform and smooth in surface.

By the technical scheme, appearance inspection is added, the appearance quality of products when leaving factories is well ensured, and the leaving-factory yield is further ensured.

In conclusion, the invention has the following beneficial effects:

1. the process flow of firstly processing the fourth blind hole and then processing the third through hole by using a lathe is adopted, so that the situation that the drill bit is broken due to wall breaking when the drill bit drills the fourth blind hole is better avoided;

2. the second through groove is processed while the fourth blind hole is processed, secondary clamping and positioning are avoided, and the position precision of the fourth blind hole and the position precision of the second through groove are improved.

Drawings

FIG. 1 is a schematic view of the internal structure of a shaft sleeve of an aircraft main wing deployment device;

fig. 2 is a schematic view of the overall structure of the shaft sleeve of the main wing unfolding device of the aircraft.

Reference numerals: 1. a first through hole; 2. a second through hole; 3. a third through hole; 4. a fourth blind hole; 5. a first through groove; 6. a second through groove; 7. a third through groove; 8. an internal thread; 9. a pin shaft hole; 10. a keyway.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

a processing technology for shaft sleeves of main wing unfolding devices of aircrafts comprises the following steps:

(1) selecting a blank: selecting blank bars larger than the maximum overall dimension according to a design drawing, wherein the blank bars are required to be larger than all the overall dimensions of the shaft sleeve by 3 mm;

(2) rough machining by a lathe: roughly processing the excircle and the end face, and reserving 1mm of allowance on the single face; roughly machining the first through hole 1 and the second throughhole 2, and reserving 1mm of allowance on a single surface;

(3) and (3) heat treatment: the heat treatment hardness is HRC32-38, so that the integral strength and toughness of the workpiece are improved;

(5) a fourth blind hole 4 is drilled by a milling machine, and a second throughgroove 6 is machined at the same time; the diameter of the fourth blind hole 4 is processed and formed at one time according to the size of a design drawing, and the depth is more than 1 mm; the second throughgroove 6 is processed according to the allowance of 1mm on the single surface; the working procedure adopts one-time clamping, a blind hole four 4 and a through groove two 6 are processed, because the workpiece in the current working procedure is a revolving body, if only the blind hole four 4 is processed, the subsequent working procedure can not carry out accurate positioning processing, and the through groove two 6 in the processing part can be used for positioning in the subsequent working procedure at the moment, so that the position precision between other characteristics and features of the workpiece can be improved;

(6) roughly machining a third through hole 3 by using a lathe, and reserving 1mm of allowance on a single surface; the blind hole IV 4 is processed before the through hole III 3 is processed, so that the influence of wall breaking on the drilling of the drill bit is better avoided, the process is more reasonable, and the processing efficiency is improved;

(7) finish machining is carried out on the numerical control lathe, the through hole I1, the through hole II 2 and the through hole III 3 are subjected to finish machining until the dimensional tolerance required by a design drawing is reached, the outer circle is subjected to finish machining, and 0.01 allowance is reserved for the outer circle; simultaneously processing an internal thread 8 and processing the length according to the tolerance requirement of a design drawing;

(7.1) detecting one, detecting the concentricity, the step size and the total length by using the total number, and entering the next procedure after the detection is qualified; the internal structure of the shaft sleeve is basically processed in the step (7), the size of the workpiece is detected, size control can be better performed, and the size problem is early found and corrected, so that the subsequent size precision is better ensured;

(9) processing a second throughgroove 6 and a third throughgroove 7 by a processing center according to the size and tolerance of a design drawing;

(10) processing thekey groove 10 and the pin shaft hole 9 on the outer circumferential surface by a processing center according to the size and tolerance of a design drawing, and clamping and positioning by using the second throughgroove 6 and the third throughgroove 7 by using a clamp so as to ensure the position precision of thekey groove 10 and the pin shaft relative to the second throughgroove 6 and the third throughgroove 7;

(11) processing two through grooves I5 by slow wire feeding, processing according to the drawing size and tolerance, and checking the size and symmetry of the two through grooves I5 after cutting;

(12) detecting in full size to ensure the size precision of delivered products and improve the yield;

(13) blackening treatment is carried out, so that a compact oxidation film is formed on the surface of the shaft sleeve, and the corrosion resistance and the rust resistance of the shaft sleeve are improved; meanwhile, appearance inspection is carried out, and the appearance is required to be blackened and uniform and have a smooth surface;

and coating a protective film on the surface of the product after all processing is finished, wherein the protective film is a polyethylene film, and finally packaging and warehousing.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The processing technology for the shaft sleeve of the main wing unfolding device of the aircraft is characterized by comprising the following steps of:

(3) and (3) heat treatment: heat treatment hardness HRC 32-38;

2. The processing technology for the shaft sleeve of the main wing unfolding device of the aircraft as claimed in claim 1, wherein step (7.1) is added between steps (7) and (8) for detecting one, the whole number is detected for concentricity, step size and total length, and the flow is transferred to step (8) after the detection is qualified.

3. The processing technology for the shaft sleeve of the main wing unfolding device of the aircraft as claimed in claim 1, wherein when the processing of step (10) is carried out, a clamp is used for clamping and positioning by using the second through groove and the third through groove.

4. The process for machining the shaft sleeve of the main wing unfolding device of the aircraft as claimed in claim 1, wherein step (12) of detection two and full-size detection are added after step (11).

5. The process for machining the shaft sleeve of the main wing unfolding device of the aircraft as claimed in claim 1, wherein the step (13) of blackening treatment is added after the step (11).

6. The process for machining the shaft sleeve of the main wing unfolding device of the aircraft according to any one of claims 1 to 5, wherein a protective film is coated on the surface of a product after all machining is finished.

7. The process for machining a shaft sleeve of a main wing unfolding device of an aircraft according to claim 6, wherein the protective film is a polyethylene film.

8. The processing technology for the shaft sleeve of the main wing unfolding device of the aircraft as claimed in claim 6, wherein the appearance of the product is checked before the protective film is coated, and the product is required to be black, uniform and smooth in surface.