CN113141680B - Method and device for reducing integral temperature difference of irregular metal plate resistance heating - Google Patents
Method and device for reducing integral temperature difference of irregular metal plate resistance heatingDownload PDFInfo
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- CN113141680B CN113141680BCN202010055113.7ACN202010055113ACN113141680BCN 113141680 BCN113141680 BCN 113141680BCN 202010055113 ACN202010055113 ACN 202010055113ACN 113141680 BCN113141680 BCN 113141680B
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- 238000010438heat treatmentMethods0.000titleclaimsabstractdescription80
- 230000001788irregularEffects0.000titleclaimsabstractdescription49
- 238000000034methodMethods0.000titleclaimsabstractdescription41
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- 239000000463materialSubstances0.000claimsabstractdescription8
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- 238000003780insertionMethods0.000claimsdescription4
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- 239000012811non-conductive materialSubstances0.000claimsdescription3
- 230000009191jumpingEffects0.000claims1
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- 229910000831SteelInorganic materials0.000description24
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- 230000006698inductionEffects0.000description3
- 238000009826distributionMethods0.000description2
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
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Abstract
Description
Technical Field
The invention relates to resistance heating of a metal plate, in particular to a method and a device for reducing the integral temperature difference of resistance heating of an irregular metal plate.
Background
The steel has wide application in the fields of automobiles and the like due to excellent mechanical properties. In particular, high-strength steel has high strength, and thus has wide application in the main body structure and the crash structure of automobiles. The production part of the parts is formed by punching, but the steel plate needs to be heated to 900 ℃ before the high-strength steel is formed by punching, an infrared heating furnace is mainly adopted to heat the steel plate abroad, the temperature of the steel plate is mainly raised by convection and radiation in the furnace, and the thickness and the surface state of the steel plate have great influence on the temperature rise of the steel plate. In China, high-strength steel plates are mainly heated by means of induction heating, but the steel plates are easy to deform due to the induction heating. The above problems can be solved by a resistance heating method in which a current is directly applied to a steel sheet and the steel sheet is heated by resistance heating, for example, patent document No. CN 106211389B;
at present, there are two main methods for heating large steel plates, one of which is a heat conduction type, such as patent documents of publication numbers CN105916608B and CN108372378A, and the method heats the outside of the steel plate, transmits heat to the steel plate by means of heat conduction, and heats the steel plate after absorbing heat, thereby achieving the purpose of heating the steel plate; another is spontaneous heating, for example, patent document CN106211389B, in which a steel sheet is heated by applying current or induction heating, and the steel sheet generates resistance heat due to electric resistance, thereby heating the steel sheet. The heat conduction type heating method is slow in heating speed, requires a long time to heat a large steel plate to 500 ℃ or more, and requires a large volume of heating equipment such as a heating furnace, which requires high cost. And the self-heating type can realize the rapid heating of the steel plate, and has lower cost. However, at present, the cross section of an irregularly-shaped punch forming steel plate is different in size in a resistance heating mode, a hole is formed in the center of the steel plate, and the like.
Disclosure of Invention
The invention aims to provide a method and a device for reducing the integral temperature difference of resistance heating of an irregular metal plate, which are based on the differential thought and provide the method for filling the irregular parts with conductive metal balls with smaller diameters so as to reduce the temperature difference in the resistance heating process of the metal plate.
The purpose of the invention is realized by the following technical scheme:
a method for reducing the integral temperature difference of resistance heating of an irregular metal plate comprises an electrode, a pressing plate, a baffle plate, a workpiece and a die, wherein a heating part of the workpiece is placed in the die, and a plurality of conductive metal balls are filled in the irregular part between the workpiece and the baffle plate and in holes of the workpiece.
As further optimization of the technical scheme, the invention provides a method for reducing the integral temperature difference of resistance heating of an irregular metal plate, which comprises the following steps:
the method comprises the following steps: inserting a workpiece into a proper position from an opening at one end of the die, and tightly attaching the lower surface of the workpiece to the upper surface of the groove of the die;
step two: placing baffle plates on two sides of a workpiece, wherein the side surfaces of the baffle plates are in contact with the side surfaces of the workpiece, the two baffle plates are parallel to each other, the distance between the two baffle plates is equal to the maximum width of the workpiece, and the length of the two baffle plates is equal to the length of the interior of a groove of a die; ensuring that the conductive metal balls are completely filled in various irregular shapes, and forming a rectangular conductive area by the conductive metal balls and the workpiece body;
Step three: filling a plurality of conductive metal balls into irregularities between the workpiece and the baffle and holes of the workpiece;
step four: removing the conductive metal balls on the upper surface of the workpiece, so that the holes of the workpiece and the metal balls filled in the irregular parts are flush with the upper surface of the workpiece, and the upper surface of the workpiece is free of the conductive metal balls;
step five: pressing the pressing plate to the upper surface of the workpiece to ensure that the pressing plate is in complete contact with the workpiece, and simultaneously applying a certain pressure on the pressing plate;
step six: electrodes are arranged at two ends of the workpiece, and are tightly pressed, and then the workpiece is electrified and heated to the required temperature;
step seven: and after heating to a preset temperature, stopping electrifying, removing the electrode, the pressing plate and the baffle, drawing out the workpiece, and recovering the conductive metal balls.
As further optimization of the technical scheme, the invention provides a method for reducing the integral temperature difference of resistance heating of an irregular metal plate, which comprises the following steps:
the method comprises the following steps: inclining the mould to enable the conductive metal balls to be totally gathered at one side or one corner of the mould;
step two: placing a workpiece at a proper position of an inner groove of a die, and tightly attaching the lower surface of the workpiece to the upper surface of the groove of the die, so as to prevent a conductive metal ball from entering between the contact surface of the workpiece and the die, and flatly placing the die;
Step three: placing baffle plates on two sides of a workpiece, wherein the side surfaces of the baffle plates are in contact with the side surfaces of the workpiece, the two baffle plates are parallel to each other, the distance between the two baffle plates is equal to the maximum width of the workpiece, and the length of the two baffle plates is equal to the length of the interior of a groove of a die; ensuring that the conductive metal balls are completely filled in various irregular shapes, and forming a rectangular conductive area by the conductive metal balls and the workpiece body;
step four: filling a plurality of conductive metal balls into irregularities between the workpiece and the baffle and holes of the workpiece;
step five: removing the conductive metal balls on the upper surface of the workpiece, so that the holes of the workpiece and the metal balls filled in the irregular positions are flush with the upper surface of the workpiece, and the upper surface of the workpiece is free of the conductive metal balls;
step six: pressing the pressing plate to the upper surface of the workpiece to ensure that the pressing plate is in complete contact with the workpiece, and simultaneously applying a certain pressure on the pressing plate;
step seven: electrodes are arranged at two ends of the workpiece, and are tightly pressed, and then the workpiece is electrified and heated to the required temperature;
step eight: and after heating to the preset temperature, stopping electrifying, removing the electrode, the pressing plate and the baffle, taking out the workpiece, skipping to the first step, and continuing heating a new workpiece.
As further optimization of the technical scheme, the method for reducing the integral temperature difference of the irregular metal plate through resistance heating is characterized in that the width and the depth of the die are both larger than the width and the height of the workpiece, the highest point of the upper surface of the workpiece is lower than the lowest point of the upper surface of the groove of the die, the two side edges of the die are both provided with inserting holes, the length of the workpiece is larger than that of the die, and the workpiece is inserted into the die through the inserting holes.
As further optimization of the technical scheme, the method for reducing the integral temperature difference of the irregular metal plate through resistance heating is characterized in that the length, the width and the depth of the groove in the die are all larger than those of the workpiece, and the highest point of the upper surface of the workpiece is lower than the lowest point of the upper surface of the groove of the die.
As further optimization of the technical scheme, the method for reducing the integral temperature difference of the irregular metal plate through resistance heating is characterized in that the die, the baffle plate and the pressing plate are all made of high-temperature-resistant non-conductive materials with poor heat conductivity, and the workpiece is made of solid conductive metal.
As further optimization of the technical scheme, the method for reducing the integral temperature difference of the irregular metal plate through resistance heating is characterized in that the material of the conductive metal ball is consistent with that of the workpiece.
As a further optimization of the technical scheme, the diameter of the conductive metal ball is smaller than the thickness of the thinnest part of the workpiece in the method for reducing the integral temperature difference of the resistance heating of the irregular metal plate.
The utility model provides a metal plate resistance heating device, includes electrode, clamp plate, baffle, work piece and mould, the both sides limit of mould all is provided with the jack, and the length of work piece is greater than the length of mould, and in the work piece passed through the jack and inserted the mould, the baffle had all been placed to the both sides that lie in the mould work piece, and two baffles were parallel to each other, and distance between two baffles equals with work piece maximum width, and the length of two baffles equals with the inside length of mould recess, fills the hole of the irregular department and the work piece between work piece and the baffle with a plurality of electrically conductive metal balls, and the clamp plate is pressed to the work piece upper surface, and the electrode has all been placed to the both ends department of work piece.
The utility model provides a metal plate resistance heating device, includes electrode, clamp plate, baffle, work piece and mould, be provided with the recess on the mould, the work piece is placed in the recess, and the baffle has all been placed to the both sides of work piece, and two baffles are parallel to each other, and distance between two baffles equals with work piece maximum width, and the length of two baffles equals with the inside length of mould recess, fills a plurality of electrically conductive metal balls to the hole of work piece and the irregular department between work piece and the baffle in, and the clamp plate is pressed to the work piece upper surface, and the electrode has all been placed to the both ends department of work piece.
The method and the device for reducing the integral temperature difference of the irregular metal plate resistance heating have the advantages that:
the method and the device for reducing the integral temperature difference of the irregular metal plate in the resistance heating process can fill the irregular shapes and the holes of the workpieces by utilizing the conductive metal balls based on the differential thought, realize the uniformity of the sectional area of a current path, reduce the skin effect, ensure the temperature consistency of the irregular-shaped workpieces in the resistance heating process and reduce the integral temperature difference of the parts in the heating process;
when workpieces in different shapes are heated, because the size of the workpiece is smaller than that of the die, other parts such as the die do not need to be replaced, the number of the conductive metal balls is increased or reduced, or the material of the conductive metal balls is changed, so that the production efficiency is high;
the method can ensure the temperature consistency of the irregular-shape workpiece in the heating process, is also suitable for heating parts with internal complex flow passages communicated with the outside, ensures that the cross section sizes of all parts of the flow passages are larger than the diameter of the metal ball, and the metal ball can be filled into the internal flow passages, thereby reducing the overall temperature difference of the complex parts in the heating process, being almost applicable to heating solid conductive metal with any shape and material, and ensuring the heating uniformity.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a first schematic structural diagram of a first metal plate resistance heating apparatus according to the present invention;
FIG. 2 is a schematic structural diagram of a first metal plate resistance heating apparatus according to the present invention;
FIG. 3 is a schematic view of a second metal plate resistance heating apparatus according to the present invention;
fig. 4 is a second schematic structural diagram of a resistance heating apparatus for metal plates according to the second embodiment of the present invention.
In the figure: anelectrode 1; apressing plate 2; abaffle 3; aworkpiece 4; and (5) a mould.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
the following describes the present embodiment with reference to fig. 1-4, a method for reducing the overall temperature difference of resistance heating of an irregular metal plate, which includes anelectrode 1, apressure plate 2, abaffle plate 3, aworkpiece 4 and amold 5, wherein a heating portion of theworkpiece 4 is disposed in themold 5, and a plurality of conductive metal balls are filled in irregularities between theworkpiece 4 and thebaffle plate 3 and in holes of theworkpiece 4; based on the differential thought, the conductive metal balls are used for filling the irregular shapes and the holes of theworkpieces 4, so that the uniformity of the sectional areas of current paths is realized, the skin effect is reduced, the temperature consistency of the irregular-shaped workpieces 4 in the resistance heating process can be ensured, and the overall temperature difference of parts in the heating process is reduced.
The second embodiment is as follows:
this embodiment is described below with reference to fig. 1-4, and this embodiment further describes the first embodiment, and the method includes the following steps:
the method comprises the following steps: inserting theworkpiece 4 from an opening at one end of thedie 5 and placing the workpiece at a proper position, wherein the lower surface of theworkpiece 4 is tightly attached to the upper surface of the groove of thedie 5; conductive metal balls are prevented from entering between the contact surfaces of theworkpiece 4 and thedie 5.
Step two: placing thebaffle plates 3 at two sides of aworkpiece 4, wherein the side surfaces of thebaffle plates 3 are contacted with the side surfaces of theworkpiece 4, the twobaffle plates 3 are parallel to each other, the distance between the twobaffle plates 3 is equal to the maximum width of theworkpiece 4, and the length of the twobaffle plates 3 is equal to the length of the inner part of a groove of adie 5; the conductive metal balls are completely filled in various irregular shapes, and the conductive metal balls and theworkpiece 4 body form a cuboid conductive area;
step three: filling a plurality of conductive metal balls into irregularities between theworkpiece 4 and thebaffle 3 and holes of theworkpiece 4; the conductive metal balls are used for filling the irregular shapes and the holes of theworkpieces 4, so that the overall temperature difference of theworkpieces 4 in the heating process is reduced; the conductive metal balls are ensured to be completely filled and can be higher than the upper surface of theworkpiece 4.
Step four: removing the conductive metal balls on the upper surface of theworkpiece 4, so that the holes of theworkpiece 4 and the metal balls filled in the irregular positions are flush with the upper surface of theworkpiece 4, and no conductive metal balls are arranged on the upper surface of theworkpiece 4; no metal balls are on the upper surface of theworkpiece 4, and the redundant metal balls are collected to a recovery device.
Step five: pressing thepressing plate 2 to the upper surface of theworkpiece 4 to ensure that thepressing plate 2 is completely contacted with theworkpiece 4, and simultaneously applying a certain pressure on thepressing plate 2; theworkpiece 4 is prevented from warping during heating.
Step six:electrodes 1 are arranged at two ends of theworkpiece 4, and are tightly pressed, and then theworkpiece 4 is electrified and heated to the required temperature; the twoelectrodes 1 are respectively a positive electrode and a negative electrode, namely, current flows in from one electrode, passes through theworkpiece 4 and the conductive metal ball, and then flows out from the other electrode.
Step seven: heating to a preset temperature, stopping electrifying, removing theelectrode 1, thepressing plate 2 and thebaffle 3, drawing out theworkpiece 4, and recovering the conductive metal balls; the method is applicable to resistive heating of virtually any solid conductive metal.
The third concrete implementation mode:
this embodiment is described below with reference to fig. 1-4, and this embodiment further describes the first embodiment, the method comprising the steps of:
the method comprises the following steps: inclining themould 5 to enable the conductive metal balls to be totally gathered at one side or one corner of themould 5;
step two: placing theworkpiece 4 at a proper position of an inner groove of thedie 5, and tightly attaching the lower surface of theworkpiece 4 to the upper surface of the groove of thedie 5, so as to prevent a conductive metal ball from entering between the contact surfaces of theworkpiece 4 and thedie 5 and flatly placing thedie 5;
Step three: placing thebaffle plates 3 at two sides of aworkpiece 4, wherein the side surfaces of thebaffle plates 3 are in contact with the side surfaces of theworkpiece 4, the twobaffle plates 3 are parallel to each other, the distance between the twobaffle plates 3 is equal to the maximum width of theworkpiece 4, and the length of the twobaffle plates 3 is equal to the length of the inner part of a groove of adie 5; the conductive metal balls are ensured to be completely filled in various irregular shapes, and the conductive metal balls and theworkpiece 4 body form a cuboid conductive area;
step four: filling a plurality of conductive metal balls into irregularities between theworkpiece 4 and thebaffle 3 and holes of theworkpiece 4; the conductive metal balls are ensured to be completely filled and can be higher than the upper surface of theworkpiece 4.
Step five: removing the conductive metal balls on the upper surface of theworkpiece 4, so that the holes of theworkpiece 4 and the metal balls filled in the irregular positions are flush with the upper surface of theworkpiece 4, and no conductive metal balls are arranged on the upper surface of theworkpiece 4; and the metal balls on the upper surface of theworkpiece 4 are removed by using the scraper, redundant metal balls are scraped between the end surface of theworkpiece 4 and the inner groove of thedie 5 by the scraper, the holes of theworkpiece 4 and the metal balls filled in the irregular shape are enabled to be flush with the upper surface of theworkpiece 4, and no metal ball exists on the upper surface of theworkpiece 4.
Step six: pressing thepressing plate 2 to the upper surface of theworkpiece 4 to ensure that thepressing plate 2 is completely contacted with theworkpiece 4, and simultaneously applying a certain pressure on thepressing plate 2; preventing theworkpiece 4 from warping during heating;
Step seven:electrodes 1 are arranged at two ends of theworkpiece 4, and are tightly pressed, and then theworkpiece 4 is electrified and heated to the required temperature; the twoelectrodes 1 are respectively a positive electrode and a negative electrode, namely current flows in from one electrode, passes through theworkpiece 4 and the conductive metal ball and then flows out from the other electrode;
step eight: after heating to the preset temperature, stopping electrifying, removing theelectrode 1, thepressing plate 2 and thebaffle 3, taking out theworkpiece 4, skipping to the first step, and continuing heating anew workpiece 4; the method is applicable to resistive heating of virtually any solid conductive metal.
The fourth concrete implementation mode:
the following describes the present embodiment with reference to fig. 1 to 4, and the present embodiment further describes the second embodiment, the width and depth of thedie 5 are both greater than the width and height of theworkpiece 4, the highest point of the upper surface of theworkpiece 4 is lower than the lowest point of the upper surface of the groove of thedie 5, both side edges of thedie 5 are provided with insertion holes, the length of theworkpiece 4 is greater than the length of thedie 5, and theworkpiece 4 is inserted into thedie 5 through the insertion holes; as shown in fig. 1-2.
The fifth concrete implementation mode:
the third embodiment is further described with reference to fig. 1-4, wherein the length, width and depth of the internal groove of thedie 5 are all greater than the length, width and height of theworkpiece 4, and the highest point of the upper surface of theworkpiece 4 is lower than the lowest point of the upper surface of the internal groove of thedie 5; as shown in fig. 3 to 4.
The sixth specific implementation mode is as follows:
in the following, the present embodiment will be described with reference to fig. 1 to 4, and the second or third embodiment will be further described in the present embodiment, themold 5, thebaffle 3, and thepressing plate 2 are all made of non-conductive materials with high temperature resistance and poor thermal conductivity, and theworkpiece 4 is made of solid conductive metal.
The seventh concrete implementation mode:
the second or third embodiment will be further described with reference to fig. 1 to 4, wherein the material of the conductive metal balls is the same as that of theworkpiece 4; temperature distribution with small overall temperature difference can be obtained; conductive metal balls made of other materials can be adopted according to requirements, so that the temperature distribution at irregular shapes or holes is changed; or the material of the conductive metal ball is different from that of theworkpiece 4.
The specific implementation mode is eight:
the present embodiment will be described with reference to fig. 1 to 4, and the present embodiment further describes the second or third embodiment, wherein the diameter of the conductive metal ball should be smaller than the thickness of the thinnest part of theworkpiece 4; the diameter of the conductive metal ball should be smaller than the thickness of the thinnest part of theworkpiece 4, and the conductive metal ball should be ensured to be smoothly separated from theworkpiece 4 under the action of gravity, and the smaller the diameter in the range is, the smaller the integral temperature difference of the workpiece is in the heating process is.
A metal plate resistance heating device comprises anelectrode 1, apressing plate 2, baffles 3, aworkpiece 4 and adie 5, wherein jacks are arranged on two side edges of thedie 5, the length of theworkpiece 4 is larger than that of thedie 5, theworkpiece 4 is inserted into thedie 5 through the jacks, thebaffles 3 are placed on two sides of theworkpiece 4 in thedie 5, the twobaffles 3 are parallel to each other, the distance between the twobaffles 3 is equal to the maximum width of theworkpiece 4, the lengths of the twobaffles 3 are equal to the length of the inner part of a groove of thedie 5, a plurality of conductive metal balls are filled in irregular parts between theworkpiece 4 and thebaffles 3 and holes of theworkpiece 4, thepressing plate 2 presses the upper surface of theworkpiece 4, and theelectrodes 1 are placed at two ends of theworkpiece 4; as shown in figures 1 to 2.
A metal plate resistance heating device comprises anelectrode 1, apressing plate 2, baffles 3, aworkpiece 4 and amold 5, wherein a groove is formed in themold 5, theworkpiece 4 is placed in the groove, thebaffles 3 are placed on two sides of theworkpiece 4, the twobaffles 3 are parallel to each other, the distance between the twobaffles 3 is equal to the maximum width of theworkpiece 4, the lengths of the twobaffles 3 are equal to the length of the inner part of the groove of themold 5, a plurality of conductive metal balls are filled in irregular parts between theworkpiece 4 and thebaffles 3 and holes of theworkpiece 4, thepressing plate 2 is pressed to the upper surface of theworkpiece 4, and theelectrode 1 is placed at two ends of theworkpiece 4; as shown in figures 3 to 4.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions and substitutions which may be made by one of ordinary skill in the art within the spirit and scope of the present invention are also within the scope of the present invention.
Claims (9)
1. A method for reducing the integral temperature difference of resistance heating of an irregular metal plate is characterized in that: the method comprises the following steps:
the method comprises the following steps: inserting the workpiece (4) into an opening at one end of the die (5) and placing the workpiece at a proper position, wherein the lower surface of the workpiece (4) is tightly attached to the upper surface of the groove of the die (5);
step two: the baffle plates (3) are placed on two sides of the workpiece (4), the side faces of the baffle plates (3) are in contact with the side faces of the workpiece (4), the two baffle plates (3) are parallel to each other, the distance between the two baffle plates (3) is equal to the maximum width of the workpiece (4), and the length of the two baffle plates (3) is equal to the length of the inner part of the groove of the die (5); the conductive metal balls are completely filled in various irregular shapes, and the conductive metal balls and the workpiece (4) body form a cuboid conductive area;
step three: filling a plurality of conductive metal balls into irregularities between the workpiece (4) and the baffle (3) and holes of the workpiece (4);
Step four: removing the conductive metal balls on the upper surface of the workpiece (4), so that the holes of the workpiece (4) and the conductive metal balls filled in the irregular positions are flush with the upper surface of the workpiece (4), and no conductive metal balls are arranged on the upper surface of the workpiece (4);
step five: pressing the pressing plate (2) to the upper surface of the workpiece (4) to ensure that the pressing plate (2) is completely contacted with the workpiece (4), and simultaneously applying certain pressure on the pressing plate (2);
step six: electrodes (1) are arranged at two ends of the workpiece (4) and are tightly pressed, and then the workpiece (4) is electrified and heated to the required temperature;
step seven: and after heating to the preset temperature, stopping electrifying, removing the electrode (1), the pressing plate (2) and the baffle (3), drawing out the workpiece (4), and recovering the conductive metal balls.
2. A method for reducing the integral temperature difference of resistance heating of an irregular metal plate is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: inclining the mould (5) to enable the conductive metal balls to be totally gathered at one side or one corner of the mould (5);
step two: placing the workpiece (4) at a proper position of a groove of the die (5), and tightly attaching the lower surface of the workpiece (4) to the upper surface of the groove of the die (5) to prevent the conductive metal ball from entering between the contact surfaces of the workpiece (4) and the die (5) and flatly placing the die (5);
Step three: the baffle plates (3) are placed on two sides of the workpiece (4), the side faces of the baffle plates (3) are in contact with the side faces of the workpiece (4), the two baffle plates (3) are parallel to each other, the distance between the two baffle plates (3) is equal to the maximum width of the workpiece (4), and the lengths of the two baffle plates (3) are equal to the length of the inner part of the groove of the die (5); the conductive metal balls are completely filled in various irregular shapes, and the conductive metal balls and the workpiece (4) body form a cuboid conductive area;
step four: filling a plurality of conductive metal balls into irregularities between the workpiece (4) and the baffle (3) and holes of the workpiece (4);
step five: removing the conductive metal balls on the upper surface of the workpiece (4), so that the holes of the workpiece (4) and the conductive metal balls filled in the irregular positions are flush with the upper surface of the workpiece (4), and no conductive metal balls are arranged on the upper surface of the workpiece (4);
step six: pressing the pressing plate (2) to the upper surface of the workpiece (4) to ensure that the pressing plate (2) is completely contacted with the workpiece (4), and simultaneously applying certain pressure on the pressing plate (2);
step seven: electrodes (1) are arranged at two ends of the workpiece (4) and are tightly pressed, and then the workpiece (4) is electrified and heated to the required temperature;
Step eight: and after heating to the preset temperature, stopping electrifying, removing the electrode (1), the pressing plate (2) and the baffle (3), taking out the workpiece (4), jumping to the first step, and continuing heating a new workpiece (4).
3. The method of claim 1, wherein the step of reducing the overall temperature difference in the resistive heating of the irregular metal plate comprises the steps of: the width and the depth of the die (5) are both larger than those of the workpiece (4), the highest point of the upper surface of the workpiece (4) is lower than the lowest point of the upper surface of the groove of the die (5), the two side edges of the die (5) are both provided with insertion holes, the length of the workpiece (4) is larger than that of the die (5), and the workpiece (4) is inserted into the die (5) through the insertion holes.
4. The method for reducing the overall temperature difference in the resistance heating of the irregular metal plate as set forth in claim 2, wherein: the length, the width and the depth of the groove of the die (5) are all larger than the length, the width and the height of the workpiece (4), and the highest point of the upper surface of the workpiece (4) is lower than the lowest point of the upper surface of the groove of the die (5).
5. The method for reducing the overall temperature difference of the irregular metal plate in the resistance heating process according to claim 1 or 2, wherein: the die (5), the baffle (3) and the pressing plate (2) are all made of high-temperature-resistant and poor-thermal-conductivity non-conductive materials, and the workpiece (4) is made of solid conductive metal.
6. The method for reducing the overall temperature difference of the irregular metal plate in the resistance heating process according to claim 1 or 2, wherein: the material of the conductive metal ball is consistent with that of the workpiece (4).
7. The method for reducing the overall temperature difference of the irregular metal plate in the resistance heating process according to claim 1 or 2, wherein: the diameter of the conductive metal ball should be smaller than the thickness of the thinnest part of the workpiece (4).
8. The utility model provides a metal plate resistance heating device, includes electrode (1), clamp plate (2), baffle (3), work piece (4) and mould (5), its characterized in that: the both sides limit of mould (5) all is provided with the jack, the length of work piece (4) is greater than the length of mould (5), work piece (4) insert in mould (5) through the jack, baffle (3) have all been placed to the both sides of work piece (4) in being located mould (5), two baffles (3) are parallel to each other, distance between two baffles (3) equals with work piece (4) maximum width, the length of two baffles (3) equals with mould (5) recess inside length, pack a plurality of electrically conductive metal balls in the hole of irregular department and work piece (4) between work piece (4) and baffle (3), clamp plate (2) are pressed to work piece (4) upper surface, electrode (1) have all been placed to the both ends department of work piece (4).
9. The utility model provides a metal sheet resistance heating device, includes electrode (1), clamp plate (2), baffle (3), work piece (4) and mould (5), its characterized in that: be provided with the recess on mould (5), work piece (4) are placed in the recess, baffle (3) have all been placed to the both sides of work piece (4), two baffles (3) are parallel to each other, distance between two baffles (3) equals with work piece (4) maximum width, the length of two baffles (3) equals with mould (5) recess inside length, pack a plurality of electrically conductive metal balls to the hole of the irregular department between work piece (4) and baffle (3) and work piece (4), clamp plate (2) are pressed to work piece (4) upper surface, electrode (1) have all been placed to the both ends department of work piece (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010055113.7ACN113141680B (en) | 2020-01-17 | 2020-01-17 | Method and device for reducing integral temperature difference of irregular metal plate resistance heating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010055113.7ACN113141680B (en) | 2020-01-17 | 2020-01-17 | Method and device for reducing integral temperature difference of irregular metal plate resistance heating |
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| CN113141680Btrue CN113141680B (en) | 2022-05-27 |
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| CN114340057B (en)* | 2021-11-30 | 2023-05-23 | 同济大学 | Conductive heating device for eliminating conductive heating deformation of ultrathin metal plate |
| CN117531911B (en)* | 2024-01-10 | 2024-03-29 | 中南大学 | A method of forming melon petal components using electric pulse creep aging |
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| GB1151348A (en)* | 1966-04-21 | 1969-05-07 | American Mach & Foundry | Method of Forming a Weld under Pressure between adjacent Metal Portions |
| CN1762040A (en)* | 2003-02-10 | 2006-04-19 | Asml控股股份有限公司 | Integrally formed bake plate unit for use in wafer fabrication system |
| CN1946919A (en)* | 2004-04-23 | 2007-04-11 | 国际壳牌研究有限公司 | Reducing viscosity of oil for production from a hydrocarbon containing formation |
- 2020
- 2020-01-17CNCN202010055113.7Apatent/CN113141680B/enactiveActive
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1151348A (en)* | 1966-04-21 | 1969-05-07 | American Mach & Foundry | Method of Forming a Weld under Pressure between adjacent Metal Portions |
| CN1762040A (en)* | 2003-02-10 | 2006-04-19 | Asml控股股份有限公司 | Integrally formed bake plate unit for use in wafer fabrication system |
| CN1946919A (en)* | 2004-04-23 | 2007-04-11 | 国际壳牌研究有限公司 | Reducing viscosity of oil for production from a hydrocarbon containing formation |
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| CN113141680A (en) | 2021-07-20 |
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