CN114273531A - Self-resistance heating device - Google Patents
Self-resistance heating device Download PDFInfo
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- CN114273531A CN114273531A CN202111589737.8A CN202111589737A CN114273531A CN 114273531 A CN114273531 A CN 114273531A CN 202111589737 A CN202111589737 A CN 202111589737A CN 114273531 A CN114273531 A CN 114273531A
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- self
- resistance heating
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- push rods
- insulating
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 51
- 238000003825 pressing Methods 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a self-resistance heating device which comprises a power-on structure, a thrust transfer structure and a chassis, wherein the power-on structure is arranged on the chassis, and the thrust transfer structure is arranged above the power-on structure; the electrifying structure comprises two groups of insulating plates, clamps, electrode plates and pressing plates which are oppositely arranged, the insulating plates are movably arranged on a chassis, and the chassis is arranged on the lower working table surface of the press; the clamp is arranged on the insulating plate, the pressing plate is arranged at the front end of the clamp, and the electrode plate is arranged on the insulating plate and below the pressing plate; the electrode plate is connected with a power supply; a self-resistance heating object is placed between the electrode plate and the pressing plate; the thrust transmission structure comprises a frame, two first upper push rods, two second upper push rods and at least two lower push rods; the front end of each insulating plate is at least provided with a lower push rod, and the lower push rods on the two insulating plates are arranged oppositely; the frame is connected with the upper working table surface of the press; first push rod and second push rod all set up the lower extreme at the frame.
Description
Technical Field
The invention belongs to the technical field of metal hot working, and particularly relates to a self-resistance heating device.
Background
The deformation resistance is reduced by the strengthening of the thermal movement of atoms in the metal along with the increase of the temperature, or the deformation resistance is reduced by the simultaneous phase change of the inside and the change from the original hard phase to the soft phase. Therefore, in plastic working, the metal is often heated and then shaped by applying a load through a die, and the heating process affects the quality and efficiency of the whole hot working. The heating modes of the metal plate materials commonly used in the hot working include the following modes: (1) the sheet material is heated in an independent heating furnace and then transferred to a mould arranged on a press from the hearth, and the defects that the temperature of the sheet material is quickly reduced in the transfer process and the forming temperature is difficult to ensure; (2) the heating furnace wraps the working space of the press, and heats the die and the plate on the die at the same time, and has the defects of high equipment modification cost, high die manufacturing cost and inapplicability to an in-die quenching process; (3) the temperature is raised by using the Joule heating effect generated by the current flowing through the metal, namely, the self-resistance heating is realized, the heating efficiency is high, the on-line heating of the plate placed on the die can be realized, the transfer procedure of the plate from the hearth to the die is omitted, the heat loss in the process is avoided, and the device is particularly suitable for heating the rectangular plate with the equal cross section.
Patent No. 201010205200.2 (current self-resistance heating method for forming thin-wall aluminum-based composite material parts) discloses a current self-resistance heating method, but the arrangement of the lower electrode clamping plate changes the position of the plate in the original forming die and naturally changes the stress state when the plate is formed. Moreover, the loosening of the electrode clamps requires additional action by the press.
Another current self-resistance heating device and method is disclosed in patent No. 201310370328.8 (current-assisted rapid thermal forming device and method for high-strength steel slender structures), in which a sheet clamping electrode still clamps the sheet during forming, so that the movement of the sheet is limited, and the stress state of the sheet during forming is also changed.
Meanwhile, in order to insulate, the original forming die is often required to be modified, or the forming die and the electrifying device are required to be designed together, so that the difficulty in designing the forming die is increased.
Disclosure of Invention
The invention aims to solve the problems that extra action is needed for loosening the electrode clamping plates applying current, the energizing device influences the mould structure, the plate forming stress state is changed and the like, and provides a self-resistance heating device for a simple bending mould.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
the self-resistance heating device comprises a power-on structure, a thrust transfer structure and a chassis, wherein the power-on structure is arranged on the chassis, and the thrust transfer structure is arranged above the power-on structure;
the electrifying structure comprises two groups of insulating plates, clamps, electrode plates and pressing plates which are oppositely arranged, the insulating plates are movably arranged on a chassis, and the chassis is arranged on the lower working table surface of the press; the clamp is arranged on the insulating plate, the pressing plate is arranged at the front end of the clamp, and the electrode plate is arranged on the insulating plate and below the pressing plate; the electrode plate is connected with a power supply; a self-resistance heating object is placed between the electrode plate and the pressing plate;
the thrust transmission structure comprises a frame, two first upper push rods, two second upper push rods and at least two lower push rods; the front end of each insulating plate is at least provided with a lower push rod, and the lower push rods on the two insulating plates are arranged oppositely; the frame is connected with the upper working table surface of the press; the first upper push rod and the second upper push rod are both arranged at the lower end of the frame; the two second upper push rods respectively correspond to the two clamps and are used for poking the clamps to enable the pressing plate to be far away from the electrode plate when the press moves downwards so as to loosen the self-resistance heating object;
and the first upper push rod is used for pushing the lower push rods on the two insulating plates open at the same time when the press continues to move downwards so as to enable the two insulating plates to move back to back, and further enable the self-resistance heating object to fall into the die.
Further: the number of the lower push rods is four, and the front end of each insulating plate is provided with two lower push rods; the first upper push rods are arranged in two numbers and respectively correspond to a pair of lower push rods which are oppositely arranged.
Further: and the insulating plate is provided with a positioning pin for positioning the self-resistance heating object.
Further: a cavity for a male die arranged on the working table surface of the press to pass through is arranged in the middle of the frame; the middle part of the chassis is provided with a cavity for a female die arranged on the lower working table surface of the press to pass through.
Further: the chassis is provided with two bases which are respectively positioned at the rear end of the insulating plate, and a spring is arranged between the base and the insulating plate.
Further: the clamp is L-shaped, and the lower end of the second upper push rod is provided with an arc surface or an inclined surface for extruding and pushing the clamp.
Further: the lower push rod is L-shaped, and the lower push rod which is oppositely arranged is provided with an opposite cambered surface or inclined surface.
Further: the lower end of the first upper push rod is provided with a roller.
The invention has the beneficial effects that:
1. the self-resistance heating of the metal plate can be realized under the condition that the original mould structure and the plate forming stress state are not changed.
2. The loosening of the heated sheet and the positioning on the die are accomplished during the press loading process without the need for additional power sources to provide motion.
Drawings
FIG. 1 is a perspective view of a self-heating device of the present invention;
FIG. 2 is a schematic structural diagram of a stage in which the self-resistance heating device clamps a self-resistance heating object according to the present invention;
FIG. 3 is a schematic structural diagram of a stage in which the self-resistance heating device only releases the self-resistance heating object and does not fall into the mold;
FIG. 4 is a schematic structural view of a stage in which a self-resistance heating object falls into a mold according to the present invention;
FIG. 5 is a schematic structural view of a bending self-resistance heating object forming stage of an upper male die of a press in the invention;
fig. 6 is a schematic structural diagram of the reset stage of the insulating plate according to the present invention.
Wherein: 1. an insulating plate; 2. clamping; 3. an electrode plate; 4. pressing a plate; 5. a lower push rod; 6. a first upper push rod; 7. positioning pins; 8. a frame; 9. a second upper push rod; 10. a base; 11. a spring; 12 chassis.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Examples
Referring to fig. 1, the present invention provides a self-resistance heating device, which includes a power-on structure, a thrust transfer structure, and a chassis 12, wherein the power-on structure is disposed on the chassis 12, and the thrust transfer structure is disposed above the power-on structure.
Specifically, the electrifying structure comprises two groups of insulating plates 1, clamps 2, electrode plates 3 and pressure plates 4 which are oppositely arranged, wherein the insulating plates 1 are movably arranged on a base plate 12, the base plate 12 is arranged on the lower working table surface of the press, and a cavity for a female die arranged on the lower working table surface of the press to pass through is arranged in the middle of the base plate 12; two bases 10 respectively positioned at the rear ends of the insulating plates 1 are arranged on the chassis 12, and springs 11 are arranged between the bases 10 and the rear ends of the insulating plates 1.
The clamp 2 is arranged on the insulating plate 1, the pressing plate 4 is arranged at the front end of the clamp 2, and the electrode plate 3 is arranged on the insulating plate 1 and below the pressing plate 4; the electrode plate 3 is connected with a power supply; a self-resistance heating object is placed between the electrode plate 3 and the pressing plate 4, and in this embodiment, the self-resistance heating object is a metal plate. And the insulating plate 1 is provided with a positioning pin 7 for positioning a metal plate.
The thrust transmission structure comprises a frame 8, two first upper push rods 6, two second upper push rods 9 and at least two lower push rods 5; the front end of each insulating plate 1 is at least provided with a lower push rod 5, and the lower push rods 5 on the two insulating plates 1 are oppositely arranged; the frame 8 is connected with the upper working table of the press, and the middle part of the frame 8 is provided with a cavity for a male die arranged on the upper working table of the press to pass through; the first upper push rod 6 and the second upper push rod 9 are both arranged at the lower end of the frame 8; the two second upper push rods 9 correspond to the two clamps 2 respectively, specifically, the clamps 2 are arranged in an L shape, the lower ends of the second upper push rods 9 are provided with cambered surfaces or inclined surfaces used for pushing the clamps 2 in a squeezing mode, when the press moves downwards, the clamps 2 are pulled to enable the pressing plates 4 to be far away from the electrode plates 3, and then metal plates are loosened.
The number of the lower push rods 5 is four, and the front end of each insulating plate 1 is provided with two lower push rods 5; the number of the first upper push rods 6 is two, and the lower ends of the first upper push rods 6 are provided with rollers which respectively correspond to a pair of lower push rods 5 which are oppositely arranged; the lower push rod 5 is L-shaped, and the lower push rod 5 which is oppositely arranged is provided with an opposite cambered surface or inclined surface. The first upper push rod 6 is used for pushing away the lower push rods 5 on the two insulating plates 1 when the press moves downwards, so that the two insulating plates 1 move backwards, and the metal plate falls into the die.
In this embodiment, the use method of the self-resistance heating device is as follows:
(1) the male die is fixed on the upper working table surface of the press through the clamping plate and penetrates through the center of the frame 8, the female die is fixed on the lower working table surface of the press through the clamping plate and penetrates through the center of the base 10, and two poles of a power supply are connected with the left electrode plate 3 and the right electrode plate 3.
(2) Placing the plate material on the left and right electrode plates 3, closing the clamp 2 to enable the pressing plate 4 to clamp the plate material, and showing in a figure 2; setting power supply parameters, starting and starting heating; and measuring the temperature of the plate in real time by using an infrared thermal imager, and starting self-resistance heating.
(3) After the plate material reaches the designated temperature or is maintained at the designated temperature for a designated period of time, the press is started, the upper working table surface descends, and the male die and the frame 8 on the upper working table surface are driven to descend. After descending for a certain distance, the push rod 9 changes the clamp 2 from the clamping state to the loosening state, and the electric heating is basically finished. And continuing descending, pushing the insulating plates 1 to slide by the first upper push rod 6 through the lower push rod 5, separating the two insulating plates 1 by a certain distance as shown in fig. 3, allowing the heated plate to slide down to a designated position on the female die under the restraint of the insulating positioning pin 7, and finishing self-resistance heating and positioning the plate as shown in fig. 4.
(4) The upper working table surface of the press continues to move downwards, the male die is contacted with the plate, and the bending forming is started. When the bending machine descends to a designated position, the bending forming is finished, and as shown in figure 5, the worktable on the press ascends immediately or ascends after keeping the position for holding pressure for a period of time.
(5) The upper working platform of the press moves upwards until the first upper push rod 6 is completely separated from the lower push rod 5, the left and right insulating plates 1 slide and close to the initial position under the action of the springs 11, and the self-resistance heating and forming of the next plate are prepared as shown in fig. 6.
The above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (8)
1. A self-resistance heating device, characterized in that: the device comprises a power-on structure, a thrust transfer structure and a chassis (12), wherein the power-on structure is arranged on the chassis (12), and the thrust transfer structure is arranged above the power-on structure;
the electrifying structure comprises two groups of insulating plates (1), clamps (2), electrode plates (3) and pressing plates (4) which are oppositely arranged, the insulating plates (1) are movably arranged on the base plate (12), and the base plate (12) is arranged on the lower working table surface of the press; the clamp (2) is arranged on the insulating plate (1), the pressing plate (4) is arranged at the front end of the clamp (2), and the electrode plate (3) is arranged on the insulating plate (1) and below the pressing plate (4); the electrode plate (3) is connected with a power supply; a self-resistance heating object is placed between the electrode plate (3) and the pressing plate (4);
the thrust transmission structure comprises a frame (8), two first upper push rods (6), two second upper push rods (9) and at least two lower push rods (5); the front end of each insulating plate (1) is at least provided with a lower push rod (5), and the lower push rods (5) on the two insulating plates (1) are oppositely arranged; the frame (8) is connected with the upper working table surface of the press; the first upper push rod (6) and the second upper push rod (9) are both arranged at the lower end of the frame (8); the two second upper push rods (9) correspond to the two clamps (2) respectively and are used for poking the clamps (2) to enable the pressing plate (4) to be far away from the electrode plate (3) when the press moves downwards so as to loosen a self-resistance heating object;
and the first upper push rod (6) is used for pushing the lower push rods (5) on the two insulating plates (1) open at the same time when the press moves downwards so as to enable the two insulating plates (1) to move back to back and further enable the self-resistance heating object to fall into the die.
2. A self-resistance heating device as claimed in claim 1, wherein: the number of the lower push rods (5) is four, and the front end of each insulating plate (1) is provided with two lower push rods (5); the number of the first upper push rods (6) is two, and the first upper push rods correspond to a pair of lower push rods (5) which are oppositely arranged respectively.
3. A self-resistance heating device as claimed in claim 1, wherein: and the insulating plate (1) is provided with a positioning pin (7) for positioning a self-resistance heating object.
4. A self-resistance heating device as claimed in claim 1, wherein: a cavity for a male die arranged on the working table surface of the press to pass through is arranged in the middle of the frame (8); and a cavity for a female die arranged on the lower working table surface of the press to penetrate through is arranged in the middle of the chassis (12).
5. A self-resistance heating device as claimed in claim 1, wherein: two bases (10) respectively positioned at the rear ends of the insulating plates (1) are arranged on the base plate (12), and springs (11) are arranged between the bases (10) and the insulating plates (1).
6. A self-resistance heating device as claimed in claim 1, wherein: the clamp (2) is L-shaped, and the lower end of the second upper push rod (9) is provided with an arc surface or an inclined surface for extruding and pushing the clamp (2).
7. A self-resistance heating device as claimed in claim 1, wherein: the lower push rod (5) is L-shaped, and the lower push rod (5) which is oppositely arranged is provided with an opposite cambered surface or inclined surface.
8. A self-resistance heating device as claimed in claim 1, wherein: the lower end of the first upper push rod (6) is provided with a roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111589737.8A CN114273531A (en) | 2021-12-23 | 2021-12-23 | Self-resistance heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111589737.8A CN114273531A (en) | 2021-12-23 | 2021-12-23 | Self-resistance heating device |
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| Publication Number | Publication Date |
|---|---|
| CN114273531A true CN114273531A (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111589737.8A Pending CN114273531A (en) | 2021-12-23 | 2021-12-23 | Self-resistance heating device |
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| CN (1) | CN114273531A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016190608A1 (en) * | 2015-05-28 | 2016-12-01 | 자동차부품연구원 | Electricity-application type jig device and method for molding vehicle sheet materials |
| CN106475475A (en) * | 2015-08-25 | 2017-03-08 | 高雄第科技大学 | Plate local heating device and heating method thereof |
| KR20180136123A (en) * | 2017-06-14 | 2018-12-24 | (주)신화웰텍 | iron plate heating machine with tension device device |
| CN110918739A (en) * | 2019-11-15 | 2020-03-27 | 武汉理工大学 | Rapid heating-forming device and method for aluminum alloy vehicle body component |
| CN115846484A (en) * | 2022-11-23 | 2023-03-28 | 华中科技大学 | Metal plate stamping forming device combining in-situ heating and ultrasonic vibration |
-
2021
- 2021-12-23 CN CN202111589737.8A patent/CN114273531A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016190608A1 (en) * | 2015-05-28 | 2016-12-01 | 자동차부품연구원 | Electricity-application type jig device and method for molding vehicle sheet materials |
| CN106475475A (en) * | 2015-08-25 | 2017-03-08 | 高雄第科技大学 | Plate local heating device and heating method thereof |
| KR20180136123A (en) * | 2017-06-14 | 2018-12-24 | (주)신화웰텍 | iron plate heating machine with tension device device |
| CN110918739A (en) * | 2019-11-15 | 2020-03-27 | 武汉理工大学 | Rapid heating-forming device and method for aluminum alloy vehicle body component |
| CN115846484A (en) * | 2022-11-23 | 2023-03-28 | 华中科技大学 | Metal plate stamping forming device combining in-situ heating and ultrasonic vibration |
Non-Patent Citations (1)
| Title |
|---|
| 席瑞: "2195铝锂合金电流辅助热冲压工艺研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》, no. 1, pages 54 - 57 * |
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