GB2475954A - Stretch forming device and method for stretch forming a workpiece - Google Patents
Stretch forming device and method for stretch forming a workpiece Download PDFInfo
- Publication number
- GB2475954A GB2475954A GB1019506A GB201019506A GB2475954A GB 2475954 A GB2475954 A GB 2475954A GB 1019506 A GB1019506 A GB 1019506A GB 201019506 A GB201019506 A GB 201019506A GB 2475954 A GB2475954 A GB 2475954A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bending
- stretch
- workpiece
- shaft
- forming device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title description 26
- 238000005452 bending Methods 0.000 abstract description 138
- 239000004033 plastic Substances 0.000 description 9
- 229920003023 plastic Polymers 0.000 description 9
- 229920002635 polyurethane Polymers 0.000 description 8
- 239000004814 polyurethane Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920001875 Ebonite Polymers 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening
- B21D25/02—Working sheet metal of limited length by stretching, e.g. for straightening by pulling over a die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/21—Deep-drawing without fixing the border of the blank
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening
- B21D25/04—Clamping arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention relates to a stretch-forming device (1,) for stretch forming a workpiece (2), which has a first bending device (3) having a first bending stamp (5) and a first bending shoe (6) and a second bending device (7) having a second bending stamp (9) and a second bending shoe (10). In addition, the stretch-forming device (1,) has a first shaft (11) and a second shaft (13), the first shaft (11) being mounted so it is rotatable around a first axis and providing a first support surface (12) for the workpiece (2), and the second shaft (13) being mounted so it is rotatable around a second axis and providing a second support surface (14) for the workpiece (2). The first bending stamp (5) and the second bending stamp (9) are components of a first part (15) of the stretch-forming device (1,), and the first bending shoe (6) and the second bending shoe (10) are components of a second part (16) of the stretch-forming device (1,). The first part (15) and the second part (16) are movable relative to one another. The second part (16) has a first recess (17) and a second recess (18), the first bending shoe (6) and the first shaft (11) being situated on opposite sides of the first recess (17) and the second bending shoe (10) and the second shaft (13) being situated on opposite sides of the second recess (18). The device may be used for producing vehicle outer skin parts.
Description
Description
STRETCH-FORMING DEVICE AND METHOD FOR STRETCH FORMING A
The invention relates to a stretch-forming device for stretch forming a workpiece, a method for stretch forming a workpiece using a stretch-forming device, and a stretch-formed part of an outer skin of a motor vehicle.
A stretch-forming tool having a tool lower part and a tool upper part, which is movable relative thereto, a forming stamp, and a stretching device, which can be lowered in relation to the forming stamp, clamps the sheet-metal board to be deformed at the edges, and forms it under tensile stress until it reaches the plastic state on the forming stamp, is known from DE 102 22 314 Al. In this stretch-forming tool, a kinematically simple, compact construction and precise control during processing of the stretch forming is achieved in that stretching slides, which work together in pairs via terminal clamping surfaces running transversely to the stroke direction of the tool parts, are provided, and these are each situated so they are displaceable in the tool lower part or upper part on linear guides inclined at equal angles diagonally to the tool interior and are movable in the retraction direction opposite to a defined counter force, which causes the clamping of the board between the clamping surfaces.
A device for planar stretch forming of workpieces is known from DE 10 2006 047 484 Al, which has a tool upper part and a tool lower part engaged with the tool upper part, which are movable relative to one another. Both the tool upper part and also the tool lower part each have at least two reforming beads, which are spaced apart from one another, on at least two sides, which each engage in corresponding recesses of the tool lower part or the tool upper part.
Outer skin parts which are produced by stretch forming according to the prior art have a relatively slight pre-stretching, for example, 0.5% to 2% pre-stretching. A higher pre-stretching typically causes an increased bulging resistance of the workpiece, for example, the outer skin part.
It is therefore the object of the invention to specify a stretch-forming device for stretch forming a workpiece, a method for stretch forming a workpiece using a stretch-forming device, and a stretch-formed part, which allow higher pre-stretching values and/or higher pre-stretching of a workpiece.
This object is achieved by the subject matter of the independent claims. Advantageous refinements result from the dependent claims.
According to the invention, a stretch-forming device for stretch forming a workpiece is provided, which has a first bending device, implemented for bending a first end area of the workpiece. The first bending device has a first bending stamp and a first bending shoe. In addition, the stretch-forming device has a second bending device, implemented for bending a second end area of the workpiece. The second bending device has a second bending stamp and a second bending shoe. Furthermore, the stretch-forming device has a first shaft, the first shaft being mounted so it is rotatable around a first axis and providing a first support surface for the workpiece. In addition, the stretch-forming device has a second shaft, the second shaft being mounted so it is rotatable around a second axis and providing a second support surface for the workpiece. The first bending stamp and the second bending stamp are components of a first part of the stretch-forming device and the first bending shoe and the second bending shoe are components of a second part of the stretch-forming device. The first part and the second part are movable relative to one another.
The second part has a first recess and a second recess, the first bending shoe and the first shaft being situated on opposite sides of the first recess and the second bending shoe and the second shaft being situated on opposite sides of the second recess.
The stretch-forming device according to the invention advantageously allows, through the two rotatably mounted shafts in the form of the first shaft and the second shaft, which each provide a support surface for the workpiece, a nearly frictionless force deflection during stretch forming of the workpiece. Friction losses during the stretch forming are thus reduced and increased force introduction into the part geometry in the form of the workpiece is made possible, whereby increased pre-stretching can be achieved, which lies in a range of 5% to 7%, for example.
The higher pre-stretching causes increased bulging resistance of the workpiece. The achieved higher bulging resistance advantageously allows a reduction of the plate thickness of the workpiece and thus lower material costs and a reduction of the part weight.
In addition to allowing a lower material use and a lower part weight for the workpiece, the stretch-forming device according to the invention has the further advantage that in contrast to typical deep drawing, no sheet-metal holder or holders are required. The sheet-metal holder guide and pressurized-gas springs or lifting pins are thus dispensed with and the overall tool height can be reduced.
Overall, the mentioned advantages additionally cause a cost savings both in the stretch-forming device and also in the The first part of the stretch-forming device can be implemented as stationary and the second part of the stretch-forming device can be implemented as movable. In a further embodiment, both the first part and also the second part of the stretch-forming device are movable. The second part of the stretch-forming device is particularly preferably implemented as stationary and the first part of the stretch-forming device is implemented as movable.
In a further preferred embodiment of the stretch-forming device according to the invention, the first bending stamp and the second bending stamp are situated on opposite sides of the first part and the first bending shoe and the second bending shoe are situated on opposite sides, corresponding thereto, of the second part. In this embodiment, the first bending device and the second bending device are therefore situated on opposite sides of the first and second part of the stretch-forming device.
In a further embodiment, the stretch-forming device additionally has a third bending device having a third bending stamp and a third bending shoe and a fourth bending device having a fourth bending stamp and a fourth bending shoe. The first bending device and the second bending device are situated on opposite sides of the first part and the second part and the third bending device and the fourth bending device are situated on opposite sides, which are complementary thereto, of the first part and the second part.
The mentioned embodiments advantageously allow reliable clamping of the workpiece between the first bending stamp and the first bending shoe and the second bending stamp and the second bending shoe and optionally the third bending stamp and the third bending shoe and the fourth bending stamp and the fourth bending shoe on at least two or optionally four sides of the workpiece.
In a further design of the stretch-forming device according to the invention, the height of the first bending stamp varies over its length and/or the height of the second bending stamp varies over its length. The first bending stamp and/or the second bending stamp may thus be adapted optimally to the workpiece.
In a further preferred embodiment, the orientation of the first bending stamp and/or the second bending stamp is adapted to the geometry of the workpiece. This embodiment also allows a precise adaptation of the first bending stamp and/or the second bending stamp to the workpiece.
In a further design of the stretch-forming device according to the invention, a lateral distance between the first bending stamp and the first bending shoe and/or a lateral distance between the second bending stamp and the second bending shoe is adapted in such a manner that a predetermined clamping force for the workpiece is settable.
A clamping force to be set for the workpiece, in order that it does not slip out of the clamping, can thus advantageously be provided, without further components being required for this purpose.
The stretch-forming device can further have a deep-drawing device having a forming stamp and a matrix corresponding thereto. The forming stamp is preferably a component of the first part of the stretch-forming device and the matrix is a component of the second part of the stretch-forming device. The mentioned embodiments thus allow, in addition to the planar stretch forming of the workpiece, deep drawing processing thereof.
Particularly preferably, the first part is an upper part of the stretch-forming device and the second part is a lower part of the stretch-forming device.
In a further preferred embodiment of the stretch-forming device according to the invention, the first bending shoe has a first clamping device and the second bending shoe has a second clamping device, the first clamping device being situated adjacent to the first recess and the second clamping device being situated adjacent to the second recess. By providing the first clamping device and the second clamping device, the required clamping, i.e., a predetermined clamping force for the workpiece, can be provided very precisely, variations in the thickness of the workpiece additionally being able to be compensated for using the clamping devices.
The first clamping device and/or the second clamping device preferably have a plate and a clamping insert. The plate can comprise a polyurethane plastic and/or a hard rubber.
The polyurethane plastic particularly advantageously has a flat modulus of elasticity. In a further embodiment, the first clamping device and/or the second clamping device have compressed-gas springs.
In a further preferred design of the stretch-forming device according to the invention, the second part has a first brake shoe and a second brake shoe, the first brake shoe being situated below the first shaft and adjacent to the first recess and the second brake shoe being situated below the second shaft and adjacent to the second recess.
Uncontrolled running on of the workpiece during the forming thereof can thus advantageously be avoided. The first brake shoe and the second brake shoe preferably comprise a polyurethane plastic and/or a hard rubber and/or compressed-gas springs.
The invention additionally relates to a method for the stretch forming of a workpiece using a stretch-forming device according to one of the cited embodiments, the method having the following steps: the workpiece is laid at least on the first support surface, the second support surface, the first bending shoe, and the second bending shoe. In addition, the first part is moved relative to the second part in such a manner that the first end area of the workpiece is clamped between the first bending stamp and the first bending shoe and the second end area of the workpiece is clamped between the second bending stamp and the second bending shoe. Furthermore, the workpiece is pre-stretched.
The method according to the invention has the advantages already mentioned in connection with the stretch-forming device according to the invention. These are not listed once again at this point to avoid repetitions.
The workpiece is preferably a deep-drawn plate or an aluminum plate.
In one embodiment of the method according to the invention, after the pre-stretching of the workpiece, the workpiece is deep drawn if the stretch-forming device has a deep-drawing device. This method is particularly suitable for workpieces which are to have a small drawing depth.
Furthermore, the invention relates to a stretch-formed part of an outer skin of a motor vehicle, the part having pre-stretching Vp. in a range 4% «= Vp. «= 8%, preferably 5% «= VR «= 7%, and more preferably 6% «= Vp. «= 7%.
The stretch-formed part according to the invention has the advantages already mentioned in connection with the stretch-forming device according to the invention, which are not listed once again at this point to avoid repetitions.
The stretch-formed part is particularly preferably produced using a method for stretch forming a workpiece according to one of the above-mentioned embodiments.
In one embodiment, the stretch-formed part is a deep-drawn plate or an aluminum plate, which preferably has a small drawing depth.
The invention will be explained in greater detail on the basis of the appended figures.
Figure 1 shows a stretch-forming device for stretch forming a workpiece according to an embodiment of the invention; Figure 2P shows a schematic perspective illustration of the first part of the stretch-forming device according to Figure 1; Figure 2B shows a schematic perspective illustration of the second part of the stretch-forming device according to Figure 1; Figures 3A through 3E show a method for stretch forming a workpiece according to an embodiment of the invention; Figures 4A through 4D shows a method for stretch forming a embodiment of the invention.
Figure 1 shows a stretch-forming device 1 for stretch forming a workpiece 2 according to an embodiment of the invention in cross-section.
The stretch-forming device 1 has a first bending device 3, which is implemented to bend a first end area 4 of the workpiece 2. For this purpose, the first bending device 3 has a first bending stamp 5 and a first bending shoe 6. In addition, the stretch-forming device 1 has a second bending device 7, which is implemented to bend a second end area 8 of the workpiece 2. For this purpose, the second bending device 7 has a second bending stamp 9 and a second bending shoe 10.
Furthermore, the stretch-forming device 1 has a first shaft 11, the first shaft 11 being mounted so it is rotatable around a first axis and providing a first support surface 12 for the workpiece 2. In addition, the stretch-forming device 1 has a second shaft 13, the second shaft 13 being mounted so it is rotatable around a second axis and providing a second support surface 14 for the workpiece 2.
The respective axes around which the first shaft 11 and the second shaft 13 are mounted so they are rotatable are situated perpendicular to the plane of the drawing in the embodiment shown and are not shown in greater detail in Figure 1.
The first bending stamp 5 and the second bending stamp 9 are components of a first part 15 of the stretch-forming device 1 and the first bending shoe 6 and the second bending shoe 10 are components of a second part 16 of the stretch-forming device 1. The first part 15 and the second part 16 are movable relative to one another. In the embodiment shown, the second part 16 is stationary and the first part 15 is movable.
-10 -The first part 15 is an upper part of the stretch-forming device 1 in the embodiment shown and the second part 16 is a lower part of the stretch-forming device 1.
The second part 16 has a first recess 17 and a second recess 18. The first bending shoe 6 and the first shaft 11 are situated on opposite sides of the first recess 17 and the second bending shoe 10 and the second shaft 13 are situated on opposite sides of the second recess 18. In the embodiment shown, the first bending shoe 6 forms a lateral surface of the first recess 17 and the second bending shoe forms a lateral surface of the second recess 18.
The first bending stamp 5 and the second bending stamp 9 are situated on opposite sides of the first part 15 and the first bending shoe 6 and the second bending shoe 10 are situated on opposite sides, corresponding thereto, of the second part 16. The first end area 4 of the workpiece 2 is situated on the same side as the first bending stamp 5 and the first bending shoe 6 and the second end area 8 of the workpiece 2, which is opposite to the first end area, is situated on the same side as the second bending stamp 9 and the second bending shoe 10.
Furthermore, the stretch-forming device 1 has a deep drawing device 19 having a forming stamp 20 and a matrix 21 corresponding thereto. In the embodiment shown, the forming stamp 20 is a component of the first part 15 of the stretch-forming device 1 and the matrix 21 is a component of the second part 16 of the stretch-forming device 1.
The workpiece 2 is, for example, a board or a plate, in particular a deep-drawn plate or an aluminum plate.
Figure 2A shows a schematic perspective illustration of the first part 15 of the stretch-forming device 1 according to Figure 1 and Figure 2B shows a schematic perspective -11 -illustration of the second part 16 of the stretch-forming device 1 according to Figure 1. Components having the same functions as in Figure 1 are identified by the same reference numerals and are not explained in greater detail hereafter.
As may be seen in Figures 2A and 2B, the first bending stamp 5 and the second bending stamp 9 as well as the first bending shoe 6 and the second bending shoe 10 each have a diagonal shape in their longitudinal directions in the embodiment shown. The orientation of the first bending stamp 5, the second bending stamp 9, the first bending shoe 6, and the second bending shoe 10 is thus adapted to the geometry of the workpiece (not shown in Figures 2A and 2B) In addition, it is also possible that the height of the first bending stamp 5 varies over its length and/or the height of the second bending stamp 9 varies over its length.
Furthermore, plain bearings 24, 26, 27, and 28 are shown in Figure 2B, in which the first shaft 11 and the second shaft 13 are mounted so they are rotatable. The plain bearings 24 and 26 are situated on the two opposite ends of the first shaft 11 and the plain bearings 27 and 28 are situated on the two opposite ends of the second shaft 13. Furthermore, in addition to the respective plain bearing situated at the ends of the shaft 11 and 13, support bearings may be provided, which are situated between the two opposite ends of the respective shaft.
Figures 3A through 3E show a method for stretch forming a workpiece 2 using the stretch-forming device 1 according to an embodiment of the invention. Components having the same functions as in the preceding figures are identified by the same reference numerals and are not explained in greater detail hereafter.
-12 - In Figures 3A through 3E, only a subarea of the stretch-forming device 1 is shown in each case, in particular the part which contains the first bending device 3 and the first shaft 11. The second bending device (not shown) and the second shaft (also not shown) are situated as shown in Figure 1.
In a first step of the method according to the invention, the workpiece 2, for example, in the form of a board, is laid on the first support surface 12 of the first shaft 11 and the second support surface of the second shaft and the first bending shoe 6 and the second bending shoe. Figure 3A shows the stretch-forming device 1 after the just-mentioned method step.
In a further step, the first part 15 is lowered in the direction toward the second part 16 and the workpiece 2 is thus clamped using a part of the first end area 4 between the first bending stamp 5 of the first part 15 in the form of an upper part and the first bending shoe 6 of the second part 16 in the form of a lower part. In addition, the workpiece 2 is clamped using a part of the second area between the second bending stamp and the second bending shoe. Figure 3B shows the stretch-forming device 1 after the just-mentioned method step.
In a further step, the first part 15 is lowered further. As the first bending stamp 5 is moved lower, which is connected thereto, the clamped workpiece 2 is also drawn downward and pre-stretched via the first shaft 11 and the second shaft. Since the first shaft 11 and the second shaft are mounted so they are rotatable, nearly frictionless force deflection is possible, whereby the highest possible pre-stretching, for example, in a range from 5% to 7%, can be achieved. In order that the workpiece 2 does not slip out of the clamping, a clamping force ascertained depending on the material quality of the workpiece 2, for example, -13 depending on plate quality, is provided. The clamping force is set via the distance between the first bending stamp 5 and the first bending shoe 6 or the second bending stamp and the second bending shoe. For this purpose, this distance is adapted in such a way that the corresponding clamping force can be provided via a segmented surface pressure. Figure 3C shows the stretch-forming device 1 after the just-mentioned method step.
After the pre-stretching to be achieved has been reached, the static friction between the workpiece 2 and the first bending stamp 5 or the second bending stamp is overcome and the workpiece 2 can run on. The clamping effect is thus reduced because of a decreased clamping surface, which results through the material retraction, and the forming of the part into the form of the workpiece 2 begins. The workpiece 2 can run on further because of the reduced clamping force. The corresponding deep-drawing process is shown in Figures 3D and 3E.
Figures 4A through 4D show a method for stretch forming a workpiece 2 using a stretch-forming device 23 according to a further embodiment of the invention. Components having the same functions as in the preceding figures are identified by the same reference numerals and are not explained in greater detail hereafter.
Only a subarea of the stretch-forming device 23 is shown in each of Figures 4A through 4D, in particular the part which contains the first bending device 3 and the first shaft 11.
The second bending device (not shown) and the second shaft (also not shown) are situated as shown in Figure 1.
The method according to this embodiment is performed essentially corresponding to the method which was shown in Figures 3A through 3E. The stretch-forming device 23 differs from the stretch-forming device 1 in that the first -14 -bending shoe 6 has a first clamping device 22 and the second bending shoe has a second clamping device, the first clamping device 22 being situated adjacent to the first recess 17 and the second clamping device being situated adjacent to the second recess. In the embodiment shown, the first clamping device 22 is implemented as a clamping insert 30, which is pre-tensioned using a plate 29 made of polyurethane plastic. The second clamping device is also implemented as a clamping insert pre-tensioned using a plate made of polyurethane plastic. The clamping force which is required depending on the quality of the workpiece 2 is set using the pre-tensioned clamping inserts.
Furthermore, possibly existing thickness tolerances of the workpiece 2 may be compensated for using the clamping insert.
In addition, the second part 16 has a first brake shoe 25 and a second brake shoe, the first brake shoe 25 being situated below the first shaft 11 and adjacent to the first recess 17 and the second brake shoe being situated below the second shaft and adjacent to the second recess. In the embodiment shown, the first brake shoe 25 is implemented as an insert 32 which is pre-tensioned using a plate 31 made of polyurethane plastic. The second brake shoe is also implemented as an insert which is pre-tensioned using a plate made of polyurethane plastic. On the one hand, the controlled intake during the forming is achieved using the pre-tensioned inserts, on the other hand, the material of the workpiece 2 is pre-stretched up to a defined drawing depth. Furthermore, possibly existing thickness tolerances of the workpiece 2 may be compensated for using the inserts.
In a first step of the method according to the invention according to this embodiment, the workpiece 2, for example, in the form of a board, is laid on the first support surface 12 of the first shaft 11 and the second support -15 -surface of the second shaft as well as the first bending shoe 6 and the second bending shoe. Figure 4A shows the stretch-forming device 23 after the just-mentioned method step.
In a further step, the first part 15 is lowered in the direction toward the second part 16 and the workpiece 2 is thus clamped using a part of the first end area 4 between the first bending stamp 5 of the first part 15 in the form of an upper part and the first clamping device 22 in the form of a pre-tensioned clamping insert of the second part 16 in the form of a lower part. In addition, the workpiece 2 is clamped using a part of the second end area between the second bending stamp and the second clamping device in the form of a pre-tensioned clamping insert. Figure 4B shows the stretch-forming device 23 after the just-mentioned method step.
In a further step, the first part 15 is lowered further. As the first bending stamp 5 moves lower in connection therewith, the clamped workpiece 2 is also drawn downward and pre-stretched via the first shaft 11 and the second shaft. Since the first shaft 11 and the second shaft are mounted so they are rotatable, nearly frictionless force deflection is possible, whereby the highest possible pre-stretching, for example, in a range of 5% to 7%, can be achieved. In order that the workpiece to does not slip out of the clamping, a clamping force is provided, which is ascertained depending on the material quality of the workpiece 2, for example, depending on the plate quality.
The clamping force is provided via the pre-tensioned plates made of polyurethane plastic behind the clamping insert.
Figure 40 shows the stretch-forming device 23 after the just-mentioned method step.
After the pre-stretching to be achieved has been reached, the first bending stamp 5 and the second bending stamp run -16 -over the respective clamping inserts, whereby the clamping force is reduced, and the forming of the part into the form of the workpiece 2 begins. The workpiece 2 can run on because of the reduced clamping force. In order to prevent uncontrolled running on, pre-tensioned brake shoes as already described above are installed below the first shaft 11 and the second shaft. The corresponding deep-drawing process is shown in Figure 4D.
-17 -List of reference numerals 1 stretch-forming device 2 workpiece 3 bending device 4 end area bending stamp 6 bending shoe 7 bending device 8 end area 9 bending stamp bending shoe 11 shaft 12 support surface 13 shaft 14 support surface part 16 part 17 recess 18 recess 19 deep-drawing device forming stamp 21 matrix 22 clamping device 23 stretch-forming device 24 plain bearing brake shoe 26 plain bearing 27 plain bearing 28 plain bearing 29 plate clamping insert 31 plate 32 insert
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009056315A DE102009056315A1 (en) | 2009-12-01 | 2009-12-01 | Stretching apparatus and method for stretch drawing a workpiece and stretch-drawn part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201019506D0 GB201019506D0 (en) | 2010-12-29 |
| GB2475954A true GB2475954A (en) | 2011-06-08 |
Family
ID=43431620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1019506A Withdrawn GB2475954A (en) | 2009-12-01 | 2010-11-18 | Stretch forming device and method for stretch forming a workpiece |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20110126607A1 (en) |
| CN (1) | CN102078896B (en) |
| DE (1) | DE102009056315A1 (en) |
| GB (1) | GB2475954A (en) |
| RU (1) | RU2550980C2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105220634B (en) * | 2011-05-30 | 2019-03-05 | 工业镀锌私人有限公司 | Improved blocking structure |
| CN102873197B (en) * | 2012-09-24 | 2015-01-21 | 珠海格力大金精密模具有限公司 | Crease-resistant sheet metal part stamping die and sheet metal part forming method |
| CN105618544A (en) * | 2014-10-28 | 2016-06-01 | 哈尔滨飞机工业集团有限责任公司 | Stretch forming technical method for high-temperature alloy materials |
| US9943901B2 (en) * | 2015-08-31 | 2018-04-17 | Ford Global Technologies, Llc | Adjustable stamping die |
| CN105414300B (en) * | 2015-12-11 | 2017-08-08 | 西南铝业（集团）有限责任公司 | One kind stretching cushion block |
| CN109604409B (en) * | 2018-11-06 | 2022-07-12 | 北京航星机器制造有限公司 | Preparation method and processing die of aluminum alloy special-shaped sheet metal part for rail transit |
| CN109500194A (en) * | 2018-12-19 | 2019-03-22 | 郑州恒众重工机械制造有限公司 | A kind of hot rolled aluminium stretching device |
| US11550229B1 (en) | 2021-06-18 | 2023-01-10 | Taiwan Semiconductor Manufacturing Company, Ltd. | Enhancing lithography operation for manufacturing semiconductor devices |
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|---|---|---|---|---|
| GB1200226A (en) * | 1966-08-19 | 1970-07-29 | Rotary Profile Anstalt | Improvements in the drawing of hollow-ware from sheet metal |
| SU1764743A1 (en) * | 1990-02-14 | 1992-09-30 | Краматорский Индустриальный Институт | Parts stretching stamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US531337A (en) * | 1894-12-25 | saltzkorn | ||
| SU516452A1 (en) * | 1974-06-13 | 1976-06-05 | Hemming device | |
| JPS5588933A (en) * | 1978-12-26 | 1980-07-05 | Hitachi Zosen Corp | Deep drawing method |
| JPS58168442A (en) * | 1982-03-31 | 1983-10-04 | Hitachi Zosen Corp | Deep drawing method using die provided with roll |
| JPS59159227A (en) * | 1983-02-28 | 1984-09-08 | Matsushita Electric Works Ltd | Drawing device |
| US4550585A (en) * | 1984-10-12 | 1985-11-05 | Naoyoshi Sasaki | Device for holding a workpiece in a press |
| SU1349830A2 (en) * | 1985-07-31 | 1987-11-07 | Волжский автомобильный завод им.50-летия СССР | Sheet blank for drawing |
| FR2655892A1 (en) * | 1989-12-18 | 1991-06-21 | Lorraine Laminage | METHOD AND DEVICE FOR SHAPING A SHEET OF SHEET PARTICULARLY FOR PRODUCING A CATHODE RAY MASK AND CATHODE RAY MASK OBTAINED ACCORDING TO THIS PROCESS. |
| FR2673127B1 (en) * | 1991-02-25 | 1994-01-07 | Renault Regie Nale Usines | PROCESS FOR STAMPING A DOUBLE U PART FROM A FLAT SHEET, AND IMPLEMENTING DEVICE COMPRISING MOBILE BLADES. |
| JP3252424B2 (en) * | 1991-12-27 | 2002-02-04 | オイレス工業株式会社 | Press mold |
| US6085571A (en) * | 1999-06-07 | 2000-07-11 | General Motors Corporation | Gravity-operated blank loading device |
| JP2001058218A (en) * | 1999-08-19 | 2001-03-06 | Toyota Motor Corp | Pressing method and device |
| FR2814387B1 (en) * | 2000-09-26 | 2002-12-06 | Aerospatiale Matra Airbus | METHOD FOR HYDROFORMING SHEETS AND DEVICE FOR IMPLEMENTING SAME |
| JP2002219529A (en) * | 2001-01-23 | 2002-08-06 | Toyota Industries Corp | Press die |
| DE10222314A1 (en) | 2002-05-18 | 2003-11-27 | Bayerische Motoren Werke Ag | Stretch forming tool |
| DE10334483B4 (en) * | 2003-07-29 | 2006-09-28 | Daimlerchrysler Ag | Method and drawing tool for producing a sheet metal part from a circuit board |
| DE102006003268B4 (en) * | 2006-01-24 | 2008-02-07 | Ford Global Technologies, LLC, Dearborn | Method and thermoforming device for deep drawing metal sheets |
| DE102006047484A1 (en) * | 2006-10-05 | 2008-04-10 | Universität Stuttgart | Device for the flat ironing of workpieces |
| DE102008034996B4 (en) * | 2008-07-25 | 2010-11-18 | Benteler Automobiltechnik Gmbh | Apparatus for thermoforming, press hardening and cutting of a semifinished product of hardenable steel |
| US20120227452A1 (en) * | 2011-03-07 | 2012-09-13 | Toyota Motor Engineering & Manufacturing North America, Inc. | Method and system for controlling the quality of a stamped part |
-
2009
- 2009-12-01 DE DE102009056315A patent/DE102009056315A1/en not_active Ceased
-
2010
- 2010-11-15 RU RU2010146394/02A patent/RU2550980C2/en not_active IP Right Cessation
- 2010-11-18 GB GB1019506A patent/GB2475954A/en not_active Withdrawn
- 2010-11-24 CN CN201010557612.2A patent/CN102078896B/en not_active Expired - Fee Related
- 2010-12-01 US US12/958,204 patent/US20110126607A1/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1200226A (en) * | 1966-08-19 | 1970-07-29 | Rotary Profile Anstalt | Improvements in the drawing of hollow-ware from sheet metal |
| SU1764743A1 (en) * | 1990-02-14 | 1992-09-30 | Краматорский Индустриальный Институт | Parts stretching stamp |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102078896A (en) | 2011-06-01 |
| US20110126607A1 (en) | 2011-06-02 |
| GB201019506D0 (en) | 2010-12-29 |
| RU2550980C2 (en) | 2015-05-20 |
| CN102078896B (en) | 2015-06-17 |
| DE102009056315A1 (en) | 2011-06-09 |
| RU2010146394A (en) | 2012-05-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |