CN101456045A - Sheet forming method and device using material thermal expansivity performance - Google Patents
Sheet forming method and device using material thermal expansivity performance Download PDFInfo
- Publication number
- CN101456045A CN101456045A CNA2009100208329A CN200910020832A CN101456045A CN 101456045 A CN101456045 A CN 101456045A CN A2009100208329 A CNA2009100208329 A CN A2009100208329A CN 200910020832 A CN200910020832 A CN 200910020832A CN 101456045 A CN101456045 A CN 101456045A
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- barrel
- sheet material
- thermal expansion
- negative mold
- carry out
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention provides a method and a device for forming a plate by adopting the heat expansion performance of the material. In the method, the material capable of flowing and having large coefficient of heat expansion is used as a convex die (3) in the process of forming the plate. When the temperature of the convex die (3) is increased, the increased volume pushes the plate (2) to be stuck with a concave die (1) so as to form a workpiece. The forming method is characterized in that a forcing press for forming the plate is not needed, only one concave die needs to be processed, the force generated when the material is heated and the volume expands is large and the novel processing method is green without pollution.
Description
Technical field
The invention belongs to the sheet material forming field, be specifically related to a kind of method and device that utilizes the material heat expansion performance to carry out sheet material forming.
Background technology
Increasing to the demand of the complex profile sheet material workpiece of single-piece or small lot in recent years, traditional manufacturing process not only needs to apply plastic force by forcing press now, also need protruding, recessed two metal dies to carry out component shaping, this increases the workpiece manufacture cost of single-piece or small lot.In small component shaping process, its plastic force should not be controlled especially, and the processing charges of minisize mould is also very expensive.
Summary of the invention
The object of the present invention is to provide a kind of method and device that utilizes the material heat expansion performance to carry out sheet material forming.Adopt the present invention can significantly reduce the manufacturing cost of single-piece or small batch workpiece, sheet material is shaped under the situation of forcing press not having, plastic force is accurately controlled by the temperature that changes thermal expansion material.
For achieving the above object, the inventive system comprises: comprise negative mold that is used for machining sheet and the barrel that matches with negative mold, in barrel, be provided with thermal expansion material, the outside of barrel is set with cartridge heater, be provided with resistive heater in the cartridge heater, and the barrel sidewall is provided with the temperature thermocouple that is used to monitor thermal expansion material, and negative mold is provided with and is used to monitor the displacement transducer that sheet material pastes the mould degree.
Negative mold of the present invention links to each other by fastening bolt and nut with barrel; Sheet material is metal material or nonmetallic materials, and metal material is steel, aluminium alloy or magnesium alloy, and nonmetallic materials are plastics or composite.
Sheet material forming method of the present invention is as follows:
1) at first, thermal expansion material is put into barrel inside;
2) then, barrel is put into the cartridge heater inside that is provided with resistive heater;
3) with fastening bolt and nut sheet material, negative mold closely are connected with barrel, and bolt is applied pretightning force;
4) to the resistive heater energising, the temperature of cartridge heater is raise, carry out component shaping;
5) by the result of computer to thermocouple and displacement sensor data, regulate the electric current of resistive heater, and then regulate the temperature of thermal expansion material, finish until being shaped.
The present invention utilizes the material heat expansion performance to carry out sheet material forming, does not need former and only needs a mould, can significantly reduce the manufacturing cost of single-piece or small batch workpiece.Can be subjected to accuracy control over temperature owing to enter the volume of thermal expansion material in the negative mold in being shaped, therefore can accomplish little forming speed and high machining accuracy, and can significantly reduce the manufacturing expense of small workpiece.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 1, the inventive system comprises negative mold 1, thermal expansion material 3, barrel 4, cartridge heater 5, fastening bolt 6, resistive heater 7, thermocouple 8 and displacement transducer 9, negative mold 1 and the barrel 4 middle sheet materials 2 of placing, flange position at negative mold 1 and barrel 4 processes a plurality of bolts hole, adopts fastening bolt 6 and nut 6-1 that negative mold 1, barrel 4 and sheet material 2 are closely linked together.Sheet material is steel, aluminium alloy or magnesium alloy, and nonmetallic materials are plastics or composite, and the pretightning force that fastening bolt 6 is applied provides pressure-pad-force for the flange position of sheet material 2.Be provided with thermal expansion material 3 in barrel 4, thermal expansion material 3 is the high material of thermal coefficient of expansion, as polytetrafluoroethylene (PTFE), thermal expansion rubber and paraffin.When temperature raise, thermal expansion material 3 flowed to barrel 4 exits, contact with sheet material 2 then, and promotion sheet material 2 pasted mutually with negative mold 1.The outside of barrel 4 is set with cartridge heater 5, be provided with resistive heater 7 in the cartridge heater 5, cartridge heater 5 is used for regulating the temperature recruitment of barrel 4 and thermal expansion material 3 and gathering way, and the sidewall of barrel 4 is provided with the temperature thermocouple 8 that is used to monitor thermal expansion material 3, and negative mold 1 is provided with the displacement transducer 9 that is used to monitor sheet material 2 subsides mould degree.By the analyzing and processing of computer to temperature and displacement data, control the temperature of thermal expansion material 3, and the volume of thermal expansion material 3, and then Forming Workpiece.
Manufacturing process of the present invention is as follows:
1) at first, thermal expansion material 3 is put into barrel 4 inside;
2) then, barrel 4 is put into cartridge heater 5 inside that are provided with resistive heater 7;
3) with fastening bolt 6 and nut 6-1 sheet material 2, negative mold 1 closely are connected with barrel 4, and bolt is applied pretightning force;
4) give resistive heater 7 energisings, the temperature of cartridge heater 5 is raise, carry out component shaping;
5) by the result of computer to thermocouple 8 and displacement transducer 9 measurement data, regulate the electric current of resistive heater 7, and then regulate the temperature of thermal expansion material 3, finish until being shaped.
Manufacturing process of the present invention and device can make sheet material be shaped under the situation of forcing press not having, and only need a mould in being shaped, and plastic force is controlled by the temperature that changes thermal expansion material.This manufacturing process is the very high plate material parts advanced manufacturing technology of a kind of flexibility.
The present invention proposes, and to utilize the material heat expansion performance to carry out the advantage of the method for sheet material forming and device as follows: 1) sheet material forming power is provided by the material thermal expansion force that is produced that is heated, and does not need forcing press in the shaping; 2) adopt thermal expansion material as the punch in the sheet material forming, only need die of processing, manufacturing expense is low; 3) can control the recruitment of its volume by the temperature of thermal expansion material, and then draw the volume that thermal expansion material flows into negative mold, thereby improve the forming accuracy of sheet material workpiece; 4) the employing fastening bolt is connected die and applies pretightning force with the barrel flange section in device, is used to provide to suppress the wrinkling pressure-pad-force of flange portion in the sheet material forming process; 5) by thermocouple being measured the data of thermal expansion material temperature, and the data of displacement sensor component shaping situation carry out Computer Processing, and then the electric current of regulating resistive heater makes forming process controlled in real time.
Claims (4)
1, a kind of device that utilizes the material heat expansion performance to carry out sheet material forming, it is characterized in that: comprise negative mold (1) that is used for machining sheet (2) and the barrel (4) that is connected with negative mold (1), in barrel (4), be provided with thermal expansion material (3), the outside of barrel (4) is set with cartridge heater (5), be provided with resistive heater (7) in the cartridge heater (5), and the barrel sidewall is provided with the temperature thermocouple (8) that is used to monitor thermal expansion material (3), and negative mold (1) is provided with and is used to monitor the displacement transducer (9) that sheet material (2) pastes the mould degree.
2, the device that utilizes the material heat expansion performance to carry out sheet material forming according to claim 1 is characterized in that: said negative mold (1) links to each other by fastening bolt (6) and nut (6-1) with barrel (4).
3, the device that utilizes the material heat expansion performance to carry out sheet material forming according to claim 1, it is characterized in that: said sheet material (2) is metal material or nonmetallic materials, metal material is steel, aluminium alloy or magnesium alloy, and nonmetallic materials are plastics or composite.
4, a kind of based on the described sheet material forming method of utilizing the material heat expansion performance to carry out the sheet material forming device of claim 1, it is characterized in that:
1) at first, thermal expansion material (3) is put into barrel (4) inside;
2) then, barrel (4) is put into cartridge heater (5) inside that is provided with resistive heater (7);
3) with fastening bolt (6) and nut (6-1) sheet material (2), negative mold (1) closely are connected with barrel (4), and bolt is applied pretightning force;
4) give resistive heater (7) energising, the temperature of cartridge heater (5) is raise, carry out component shaping;
5) by the result of computer to thermocouple (8) and displacement transducer (9) measurement data, regulate the electric current of resistive heater (7), and then regulate the temperature of thermal expansion material (3), finish until being shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100208329A CN101456045A (en) | 2009-01-08 | 2009-01-08 | Sheet forming method and device using material thermal expansivity performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100208329A CN101456045A (en) | 2009-01-08 | 2009-01-08 | Sheet forming method and device using material thermal expansivity performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101456045A true CN101456045A (en) | 2009-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100208329A Pending CN101456045A (en) | 2009-01-08 | 2009-01-08 | Sheet forming method and device using material thermal expansivity performance |
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| CN (1) | CN101456045A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109079109A (en) * | 2018-08-06 | 2018-12-25 | 北京汽车集团有限公司 | Cast the mold and method of thin-walled parts |
| CN112024811A (en) * | 2020-07-03 | 2020-12-04 | 江苏海宇机械有限公司 | Forging process capable of reducing incomplete flange plate |
| CN113532105A (en) * | 2021-05-24 | 2021-10-22 | 安徽省泽乾冶金科技有限公司 | Rotary kiln sealing device |
| CN114472663A (en) * | 2022-02-22 | 2022-05-13 | 沈阳航空航天大学 | Method and device for performing warm-hot forming on light alloy sheet metal part by taking thermal expansion graphite as force transmission medium |
-
2009
- 2009-01-08 CN CNA2009100208329A patent/CN101456045A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109079109A (en) * | 2018-08-06 | 2018-12-25 | 北京汽车集团有限公司 | Cast the mold and method of thin-walled parts |
| CN109079109B (en) * | 2018-08-06 | 2021-01-01 | 北京汽车集团有限公司 | Mould and method for casting thin-wall parts |
| CN112024811A (en) * | 2020-07-03 | 2020-12-04 | 江苏海宇机械有限公司 | Forging process capable of reducing incomplete flange plate |
| CN113532105A (en) * | 2021-05-24 | 2021-10-22 | 安徽省泽乾冶金科技有限公司 | Rotary kiln sealing device |
| CN114472663A (en) * | 2022-02-22 | 2022-05-13 | 沈阳航空航天大学 | Method and device for performing warm-hot forming on light alloy sheet metal part by taking thermal expansion graphite as force transmission medium |
| CN114472663B (en) * | 2022-02-22 | 2024-06-18 | 沈阳航空航天大学 | Method and device for carrying out warm forming on light alloy sheet metal part by taking thermal expansion graphite as force transfer medium |
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Open date: 20090617 |