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 heating Download PDFInfo
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- CN113141680B CN113141680B CN202010055113.7A CN202010055113A CN113141680B CN 113141680 B CN113141680 B CN 113141680B CN 202010055113 A CN202010055113 A CN 202010055113A CN 113141680 B CN113141680 B CN 113141680B
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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
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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
- H05B3/03—Electrodes
Abstract
The invention relates to metal plate resistance heating, in particular to a method and a device for reducing the integral temperature difference of irregular metal plate resistance heating, which comprises an electrode, a pressing plate, a baffle plate, a workpiece and a die, wherein a heating part of the workpiece is arranged in the die, and a plurality of conductive metal balls are filled in the irregular part between the workpiece and the baffle plate and the holes of the workpiece; when the workpieces in different shapes are heated, 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, and the production efficiency is high.
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: an electrode 1; a pressing plate 2; a baffle 3; a workpiece 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 an electrode 1, a pressure plate 2, a baffle plate 3, a workpiece 4 and a mold 5, wherein a heating portion of the workpiece 4 is disposed in the mold 5, and a plurality of conductive metal balls are filled in irregularities between the workpiece 4 and the baffle plate 3 and in holes of the workpiece 4; based on the differential thought, the conductive metal balls are used for filling the irregular shapes and the holes of the workpieces 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 the workpiece 4 from 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; conductive metal balls are prevented from entering between the contact surfaces of the workpiece 4 and the die 5.
Step two: placing the baffle plates 3 at two sides of a workpiece 4, wherein the side surfaces of the baffle plates 3 are contacted with the side surfaces 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 a groove of a 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; the conductive metal balls are used for filling the irregular shapes and the holes of the workpieces 4, so that the overall temperature difference of the workpieces 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 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 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; no metal balls are on the upper surface of the workpiece 4, and the redundant metal balls are collected to a recovery device.
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 a certain pressure on the pressing plate 2; the workpiece 4 is prevented from warping during heating.
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; the two electrodes 1 are respectively a positive electrode and a negative electrode, namely, current flows in from one electrode, passes through the workpiece 4 and the conductive metal ball, and then flows out from the other electrode.
Step seven: heating to a 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; 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 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 an inner 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, so as to prevent a 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: placing the baffle plates 3 at two sides of a workpiece 4, wherein the side surfaces of the baffle plates 3 are in contact with the side surfaces 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 a groove of a die 5; the conductive metal balls are ensured to be 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; the conductive metal balls are ensured to be completely filled and can be higher than the upper surface 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 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; and the metal balls on the upper surface of the workpiece 4 are removed by using the scraper, redundant metal balls are scraped between the end surface of the workpiece 4 and the inner groove of the die 5 by the scraper, the holes of the workpiece 4 and the metal balls filled in the irregular shape are enabled to be flush with the upper surface of the workpiece 4, and no metal ball exists 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 a certain pressure on the pressing plate 2; preventing the workpiece 4 from warping during heating;
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; the two electrodes 1 are respectively a positive electrode and a negative electrode, namely current flows in from one electrode, passes through the workpiece 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 the electrode 1, the pressing plate 2 and the baffle 3, taking out the workpiece 4, skipping to the first step, and continuing heating a new 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 the die 5 are both greater than the width and height 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, both side edges of the die 5 are provided with insertion holes, the length of the workpiece 4 is greater than the length of the die 5, and the workpiece 4 is inserted into the die 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 the die 5 are all greater than the length, width and 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 internal groove of the die 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, the mold 5, the baffle 3, and the pressing plate 2 are all made of non-conductive materials with high temperature resistance and poor thermal conductivity, and the workpiece 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 the workpiece 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 the workpiece 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 the workpiece 4; the diameter of the conductive metal ball should be smaller than the thickness of the thinnest part of the workpiece 4, and the conductive metal ball should be ensured to be smoothly separated from the workpiece 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 an electrode 1, a pressing plate 2, baffles 3, a workpiece 4 and a die 5, wherein jacks are arranged on two side edges of the die 5, the length of the workpiece 4 is larger than that of the die 5, the workpiece 4 is inserted into the die 5 through the jacks, the baffles 3 are placed on two sides of the workpiece 4 in the die 5, the two baffles 3 are parallel to each other, the distance between the two baffles 3 is equal to the maximum width of the workpiece 4, the lengths of the two baffles 3 are equal to the length of the inner part of a groove of the die 5, a plurality of conductive metal balls are filled in irregular parts between the workpiece 4 and the baffles 3 and holes of the workpiece 4, the pressing plate 2 presses the upper surface of the workpiece 4, and the electrodes 1 are placed at two ends of the workpiece 4; as shown in figures 1 to 2.
A metal plate resistance heating device comprises an electrode 1, a pressing plate 2, baffles 3, a workpiece 4 and a mold 5, wherein a groove is formed in the mold 5, the workpiece 4 is placed in the groove, the baffles 3 are placed on two sides of the workpiece 4, the two baffles 3 are parallel to each other, the distance between the two baffles 3 is equal to the maximum width of the workpiece 4, the lengths of the two baffles 3 are equal to the length of the inner part of the groove of the mold 5, a plurality of conductive metal balls are filled in irregular parts between the workpiece 4 and the baffles 3 and holes of the workpiece 4, the pressing plate 2 is pressed to the upper surface of the workpiece 4, and the electrode 1 is placed at two ends of the workpiece 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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| 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 | Method for creep aging forming melon petal member by utilizing electric pulse |
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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 |
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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 |
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| CN113141680A (en) | 2021-07-20 |
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Effective date of registration: 20221117 Address after: Room 611-426, R&D Center Building, China (Hefei) International Intelligent Voice Industrial Park, No. 3333, Xiyou Road, High tech Zone, Hefei, Anhui 230000, China (Anhui) Pilot Free Trade Zone Patentee after: Anhui Wanyu mechanical equipment Technology Co.,Ltd. Address before: Plant 3, No. 99, Shaojing Road, Kunshan Development Zone, Suzhou City, Jiangsu Province 215334 Patentee before: KUNSHAN WORLD-WIDE SPECIAL WELDING CO.,LTD. |
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