CN102601200A - Sheet metal gradient-temperature deep-drawing forming method and device - Google Patents
Sheet metal gradient-temperature deep-drawing forming method and device Download PDFInfo
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- CN102601200A CN102601200A CN2012100580366A CN201210058036A CN102601200A CN 102601200 A CN102601200 A CN 102601200A CN 2012100580366 A CN2012100580366 A CN 2012100580366A CN 201210058036 A CN201210058036 A CN 201210058036A CN 102601200 A CN102601200 A CN 102601200A
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Abstract
The invention provides a sheet gradient-temperature deep-drawing forming method and device, belonging to the technical field of sheet metal warm forming and dedicated equipment. The forming method is as follows: heating a pressing plate and a concave mould before the mould is closed, putting the processed blank into the mould, after the mould is closed, warming the sheet metal by means of heat transfer between the mould and the sheet metal; by processing small holes f1mm-f8mm on the contact face among the concave mould, the pressing plate and the sheet metal, making the contact area in unit between the sheet metal and the mould on the rise trend to the flange edge from the round angle of the concave mould; making the convex mould slide downward, stamping and forming the sheet metal, and taking the workpiece out after the mould is opened. The sheet gradient-temperature deep-drawing forming device provided in the invention improves the forming performance of sheet metal by processing a plurality of small holes f1mm-f8mm on the surface of the mould contacted with the sheet metal. The method provided by the invention is easy to implement, furthermore, compared with sheet metal constant-temperature deep-drawing, the forming performance of sheet metal can be improved obviously, and the potentiality of temperature to the forming performance of sheet metal is developed.
Description
Technical field
Sheet material warm drawing forming method of ladder of the present invention and equipment belong to plate Warm Forming Technology and special technology equipment.
Background technology
Adopting warm working is the effective way that improves alloy in lightweight forming properties such as aluminium, magnesium, will produce active influence to the broader applications of aluminium, magnesium alloy.Adopt Warm Forming Technology can increase substantially the forming limit of alloy in lightweight such as magnalium.
In the sheet metal deep drawing process; The flange position is progressively to enter in the die by the pulling force from the near metal of die entrance from the metal of die entrance distance; This requires the yield stress from die oral area fillet to the flange edge metal to successively decrease, and could guarantee the continuous of deformation process.For each specific alloy material, temperature is the key factor that influences yield stress.Setting up the uneven temperature that from the die entrance to the flange edge, increases progressively at the flange position and distribute, is the effective way that further improves plate temperature pull and stretch effect.
Further further investigation also confirms, the temperature field of adopting certain Gradient distribution is than adopting whole uniform temperature in shaping aluminium, magnesium alloy, to have more advantage.With simple cup shell pull and stretch is example, and flange region becomes ascendant trend to distribute from the die mouth to blank flange outward flange gradient temperature more helps being shaped; The shaping of complex parts requires uneven Temperature Distribution especially, to coordinate to obtain higher forming limit mutually with forming process.The current mode of heating that adopts; As shown in Figure 1; Mainly be to realize heating, realize heating, carry out pull and stretch after plate reaches stationary temperature by the time plate through heat transmission between mould and plate to die and holding pad through in holding pad and die, burying heating rod or heating plate underground; Adopt heating rod or heating plate heating mould, the temperature field that forms through heat transmission heating plate again differs very big with the temperature field that deformation process is coordinated mutually, can not give full play to the potentiality that temperature improves for the sheet forming performance; Though can make mould itself form certain thermograde through size, quantity and the burial place that changes heating rod; But this method technological measure is complicated, very flexible; The gradient temperature that forms differs bigger with the thermograde that distortion adapts, and can not give full play to temperature to improving the potentiality of sheet forming performance.
Summary of the invention
The object of the invention is to provide a kind of simple in structure, low cost of manufacture, and in the sheet metal deep drawing process, the flange part potential energy is enough realized the simple process measure and the special technology equipment of ladder temperature.
The warm drawing forming method of a kind of sheet material ladder provided by the present invention comprises following process:
(1) heating holding pad and die make its temperature reach design temperature before mould closes;
(2) blank that processes is placed in the mould, mould closes heats up plate through the conduction of the heat between mould and plate; Through on the surface of die that contacts with plate and holding pad, processing the aperture of f1mm ~ f8mm; Make the interior contact area of plate and mould unit from the distribution in rising trend of die entrance to flange edge; Change heat transfer process through changing the heat transfer contact face, make blank flange position form gradient temperature from the distribution in rising trend of die entrance to flange edge;
(3) after the heating setpoint time arrived, punch began descending, sheet metal forming; Take out workpiece after the die sinking, mould restPoses.
The warm drawing and forming special equipment of a kind of plate ladder provided by the present invention, this equipment comprises die, punch, holding pad and mold heating device; Wherein on the surface of die that contacts with plate and holding pad, be processed with the aperture of f1mm ~ f8mm; Make the interior contact area of plate and mould unit from the distribution in rising trend of die entrance to flange edge; Change heat transfer process through changing the heat transfer contact face, make blank flange position form gradient temperature from the distribution in rising trend of die entrance to flange edge.。
Description of drawings
Fig. 1 is the warm pull and stretch schematic diagram of plate ladder of the present invention.
Fig. 2 is the warm pull and stretch schematic diagram of common plate.
Among the figure: 1. punch; 2. holding pad backing plate; 3. holding pad heater; 4. plate; 5. holding pad; 6. die; 7. die heater; 8. die backing plate; 9. thermal insulation board; 10. die lower bolster; 11. the surperficial aperture on die and the holding pad.
The specific embodiment
The present invention realizes that the concrete grammar that sheet metal deep drawing process flange position ladder temperature distributes is:
Mould basic structure of the present invention is identical with common plate warm working mould; Adopt modes such as heating rod, heating plate or electromagnetism heating that die and holding pad temperature are raise, realize heating plate through the heat transmission between mould and the plate; Through on the contact-making surface of die and holding pad and plate, processing the aperture of f1mm ~ f8mm; Make the interior contact area of plate and mould unit from the distribution in rising trend of die entrance to flange edge; Change heat transfer process through changing the heat transfer contact face, blank flange position is formed from the gradient temperature of die entrance to flange edge distribution in rising trend distribute.
Specific embodiments:
Die surface drill hole density near from the die entrance position is bigger; To reduce heat-transfer area; Die surface drill hole density from the die entrance distance is less; Make the heat transfer contact face bigger, make in the plate unit are of formation to become to increase progressively trend from the die oral area to the blank flange edge with the mould contact surface area; The degree of depth of machining hole is greater than one times of aperture, aperture f1mm ~ f8mm.
Method among the present invention also can be used as the implementing process measure that the heating-up temperature field is optimized, and the zone that reduces heating-up temperature at needs processes the aperture of certain density according to Optimization result, reduces heat-transfer area.
Claims (2)
1. the warm drawing forming method of sheet material ladder is characterized in that this method comprises following process:
(1) heating holding pad and die before mould closes make the temperature of described holding pad and die reach design temperature;
(2) blank that processes is placed in the mould, mould closes heats up plate through the conduction of the heat between mould and plate; Through on the surface of die that contacts with plate and holding pad, processing the aperture of f1mm ~ f8mm; Make the interior contact area of plate and mould unit from the distribution in rising trend of die entrance to flange edge; Change heat transfer process through changing the heat transfer contact face, make blank flange position form gradient temperature from the distribution in rising trend of die entrance to flange edge;
(3) after the heat time heating time of setting, punch begins descending, sheet metal forming; Take out workpiece after the die sinking, mould restPoses.
2. an equipment of realizing the warm drawing forming method of the said plate ladder of claim 1 is characterized in that this equipment comprises die, punch, holding pad and heater; Wherein on the surface of die that contacts with plate and holding pad, be processed with the aperture of f1mm ~ f8mm; Make the interior contact area of plate and mould unit from the distribution in rising trend of die entrance to flange edge; Change heat transfer process through changing the heat transfer contact face, make blank flange position form gradient temperature from the distribution in rising trend of die entrance to flange edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100580366A CN102601200A (en) | 2012-03-07 | 2012-03-07 | Sheet metal gradient-temperature deep-drawing forming method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100580366A CN102601200A (en) | 2012-03-07 | 2012-03-07 | Sheet metal gradient-temperature deep-drawing forming method and device |
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| CN102601200A true CN102601200A (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100580366A Pending CN102601200A (en) | 2012-03-07 | 2012-03-07 | Sheet metal gradient-temperature deep-drawing forming method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240763A (en) * | 2013-05-13 | 2013-08-14 | 东莞市比比克电子科技有限公司 | Lithium ion battery aluminum plastic film forming punch and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3015292A (en) * | 1957-05-13 | 1962-01-02 | Northrop Corp | Heated draw die |
| SU1660800A1 (en) * | 1989-07-19 | 1991-07-07 | Днепропетровский Металлургический Институт | Deep drawing device |
| CN2774673Y (en) * | 2005-01-19 | 2006-04-26 | 中国科学院金属研究所 | Thermal hydraulic forming mould unit for magnesium alloy plate |
| CN101380654A (en) * | 2008-10-14 | 2009-03-11 | 沈阳理工大学 | Deep drawing method of magnesium alloy tailor welded blanks |
| US20100116015A1 (en) * | 2007-01-17 | 2010-05-13 | Nagaoka University Of Technology | Deep-drawing device |
| CN201552727U (en) * | 2009-05-12 | 2010-08-18 | 徐正立 | Heat distribution and conduction controllable device for heating rod |
| CN102139304A (en) * | 2010-11-17 | 2011-08-03 | 安徽工业大学 | Thermal hydro-mechanical drawing forming method for dot matrix self-impedance electrical heating plates |
-
2012
- 2012-03-07 CN CN2012100580366A patent/CN102601200A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3015292A (en) * | 1957-05-13 | 1962-01-02 | Northrop Corp | Heated draw die |
| SU1660800A1 (en) * | 1989-07-19 | 1991-07-07 | Днепропетровский Металлургический Институт | Deep drawing device |
| CN2774673Y (en) * | 2005-01-19 | 2006-04-26 | 中国科学院金属研究所 | Thermal hydraulic forming mould unit for magnesium alloy plate |
| US20100116015A1 (en) * | 2007-01-17 | 2010-05-13 | Nagaoka University Of Technology | Deep-drawing device |
| CN101380654A (en) * | 2008-10-14 | 2009-03-11 | 沈阳理工大学 | Deep drawing method of magnesium alloy tailor welded blanks |
| CN201552727U (en) * | 2009-05-12 | 2010-08-18 | 徐正立 | Heat distribution and conduction controllable device for heating rod |
| CN102139304A (en) * | 2010-11-17 | 2011-08-03 | 安徽工业大学 | Thermal hydro-mechanical drawing forming method for dot matrix self-impedance electrical heating plates |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240763A (en) * | 2013-05-13 | 2013-08-14 | 东莞市比比克电子科技有限公司 | Lithium ion battery aluminum plastic film forming punch and method |
| CN103240763B (en) * | 2013-05-13 | 2016-04-13 | 东莞市卓高电子科技有限公司 | Lithium ion battery aluminum plastic film shaping punching bed and forming method thereof |
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Application publication date: 20120725 |