Precise bending die, draft angle shaping method and continuous production stamping equipment
Through the cooperation of the upper mold and the floating shaping mold, the precise bending mold eliminates the draft angle of the workpiece, solves the problems of large equipment investment and space occupation, and achieves efficient and reliable workpiece shaping.
Patent Information
- Application Number
- CN202510375693.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2025-07-04
AI Technical Summary
In the prior art, when using the two-side shaping modules to side shaping the workpiece, the equipment investment and space occupies a large amount of equipment, and it is difficult to efficiently eliminate the draft angle.
The precise bending mold is adopted. Through the cooperation of the upper mold and the floating shaping mold, the upper mold drop is used to push the floating shaping mold and the workpiece to lower together, achieving reliable bending of the workpiece and eliminating the draft angle.
The structure is simple, the cost is low, the equipment space is saved, the processing efficiency is improved, and the reliable bending effect of the workpiece is achieved.
Smart Images
Figure CN120243739A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of draft angle shaping, and specifically, to a precision bending die, a draft angle shaping method, and a continuous production stamping device. Background Art
[0002] The draft angle of a stamping part is the slope introduced in die design to facilitate demolding. It is the angle between the side wall of the die and the vertical direction, ensuring that the stamping part can be smoothly removed from the die. The draft angle is usually set to 5 - 8°.
[0003] To meet the design requirements of the workpiece and the needs of subsequent processes, it is also necessary to perform side shaping on the workpiece with a draft angle. Through side shaping, the side wall of the workpiece can be shaped into an angle that meets the design requirements.
[0004] Currently, side shaping is achieved by arranging movable shaping modules on both sides of the workpiece. The shaping modules on both sides act on the workpiece simultaneously to realize the bending and shaping of the side draft angle of the workpiece. When using this side shaping method, it is necessary to separately arrange shaping modules and the corresponding pressure mechanisms on both sides of the workpiece, resulting in a very large investment in equipment and space occupation. Summary of the Invention
[0005] The purpose of the present invention is to provide a precision bending die, a draft angle shaping method, and a continuous production stamping device. The precision bending die can shape a workpiece with a draft angle and eliminate its draft angle.
[0006] To achieve the above purpose, the present invention provides a precision bending die, which includes an upper die that makes a lifting motion and a floating shaping die that can lift and cooperate with the upper die. The lower surface of the upper die is provided with a curved surface that is conformable to the surface of the workpiece. The upper surface of the floating shaping die is provided with a curved surface that is conformable to the surface of the workpiece. Bending lines are arranged on both sides of the floating shaping die, and the upper die cooperates with the bending lines to bend the workpiece at the bending line position.
[0007] Preferably, the precision bending die further includes fixedly arranged fixed inserts located on both sides of the floating shaping die. The upper surface of the fixed insert is provided with a first limiting surface, and the surfaces of the two sides of the upper die opposite to the fixed inserts are provided with a second limiting surface. The first limiting surface cooperates with the second limiting surface.
[0008] Preferably, a bending gap is provided between the fixed insert and the floating shaping die, and at least part of the workpiece is located in the bending gap.
[0009] Preferably, the surface of the fixed insert facing the floating shaping die is provided with a chamfered surface.
[0010] Preferably, the ends on both sides of the workpiece are in contact with the chamfered surface.
[0011] Preferably, a compressible elastic member is provided at the lower end of the floating shaping die.
[0012] The present invention also provides a draft angle shaping method, which uses a precision bending die and includes:
[0013] Step 1, placing the workpiece on the floating shaping die;
[0014] Step 2, lowering the upper die until it contacts the workpiece;
[0015] Step 3, the upper die pushes the floating die and the workpiece to descend together, and shaping is completed during the descent;
[0016] Step 4, the upper die rises and the workpiece is taken out.
[0017] Preferably, in Step 3, the end portions on both sides of the workpiece slide along the chamfered surface of the fixed insert.
[0018] The present invention also provides a stamping device for continuous production, which includes a plurality of continuously arranged stamping processes and a robotic arm for picking and placing workpieces corresponding to each of the plurality of stamping processes, and the precision bending die is set as one of the plurality of stamping processes.
[0019] Preferably, the plurality of stamping processes are arranged in a straight line, and the plurality of stamping processes share a press, and the press drives the upper die to move up and down.
[0020] According to the above technical solution, the workpiece of the present invention is placed on the floating shaping die. During the descent of the upper die, it will contact the workpiece, and then start to push the workpiece and the floating shaping die to descend together until the upper die descends in place. During the descent of the upper die, the edge to be bent of the workpiece is bent at the same time.
[0021] The bending line of the floating shaping die corresponds to position A on the workpiece. As Figure 7 shown, during the process of bending the workpiece, the upper die will push the floating shaping die to descend together. During the descent of the floating shaping die, it will also exert a reaction force on the upper die. Under the combined action of the upper die and the floating shaping die, the workpiece will be bent at position A, and the angle of this bend is adapted to the surface shape of the upper die. That is, during the descent of the upper die, it will push the edge to be bent inward. During the pushing process, the edge to be bent bends inward around the bending line, so as to achieve the purpose of eliminating the draft angle.
[0022] Preferably, the outer edges on both sides of the upper die extend beyond the bending line by a certain distance, so that when the edge to be bent of the workpiece bends along the bending line, the upper die can still exert a thrust on the edge that extends beyond the floating shaping die. Under the action of this thrust, the edge to be bent that extends beyond the floating shaping die can bend inward along the bending line, so as to achieve a reliable bending effect on the workpiece.
[0023] Preferably, the working surfaces of the upper die and the floating shaping die cooperate with each other and are both set as curved surfaces that are conformable to the surface of the workpiece. During the descent of the upper die, the lower end of the upper die contacts the edge to be folded of the workpiece and continuously squeezes the edge to be folded of the workpiece inward until the edge to be folded fits against the side surface of the shaping die, thereby achieving a reliable bending effect on the workpiece.
[0024] During the descent of the upper die, the floating shaping die will first follow the descent of the upper die until the upper die reaches the end position. Preferably, after the upper die reaches the end position, it remains for a period of time to make the bending effect of the upper die on the workpiece more reliable.
[0025] Preferably, a mechanism for positioning and limiting the workpiece is provided on the floating shaping die, so that during the bending of the workpiece by the precision bending die, the relative position of the workpiece and the floating shaping die does not change, thereby achieving a reliable bending effect on the workpiece.
[0026] Therefore, the precision bending die only needs to set the cooperation between the upper die and the floating shaping die to achieve the bending effect on the workpiece, with a simple structure, low cost, and can save the space occupied by the equipment.
[0027] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification, and are used to explain the present invention together with the following specific implementation, but do not constitute a limitation to the present invention. In the drawings:
[0029] Figure 1 is a perspective view of a precision bending die;
[0030] Figure 2 is Figure 1 the front view of
[0031] Figure 3 is a perspective view of a precision bending die without the upper die;
[0032] Figure 4 is Figure 3 the front view of
[0033] Figure 5 is a top view of a floating shaping die;
[0034] Figure 6 is Figure 5 the front view of
[0035] Figure 7 is a cross-sectional comparison diagram of the workpiece before and after shaping;
[0036] Figure 8It is a top view of a continuous production stamping device.
[0037] Explanation of reference numerals
[0038] 1 Upper die 2 Floating sizing die
[0039] 3 Fixed insert 31 First limiting surface
[0040] 11 Second limiting surface 32 Bending gap
[0041] 33 Chamfered surface 10 Workpiece
[0042] 21 Bending line 101 Edge to be bent
[0043] 102 Bent edge 41 Robot arm
[0044] 42 Stamping process 5 Precision bending die Detailed implementation manners
[0045] The following will describe in detail the detailed implementation manners of the present invention with reference to the accompanying drawings. It should be understood that the detailed implementation manners described herein are only for explaining and interpreting the present invention, and are not used to limit the present invention.
[0046] In the present invention, unless otherwise stated, the directional terms included in terms such as "lower surface, both sides, upper surface, facing, lower end" only represent the direction of the term in the normal use state, or the common name understood by those skilled in the art, and should not be regarded as a limitation of the term.
[0047] A precision bending die includes an upper die 1 that makes a lifting motion and a floating sizing die 2 that can lift and cooperate with the upper die 1. The lower surface of the upper die 1 is provided with a curved surface that is in conformity with the surface of the workpiece 10. The upper surface of the floating sizing die 2 is provided with a curved surface that is in conformity with the surface of the workpiece 10. Bending lines 21 are provided on both sides of the floating sizing die 2. The upper die 1 cooperates with the bending lines 21 to bend the workpiece 10 at the positions of the bending lines 21.
[0048] As Figure 7 shown, in order to facilitate demolding, the angle of the edge to be bent 101 of the workpiece 10 is about 5 - 8° before sizing. In order to meet the setting requirements of the workpiece 10, it is necessary to size the edge to be bent 101 so that the angle after sizing is 0°, becoming the state of the bent edge 102.
[0049] By implementing the above solution, the workpiece 10 is placed on the floating sizing die 2. During the process of the upper die 1 descending, it will contact the workpiece 10, and then start to push the workpiece 10 to descend together with the floating sizing die 2 until the upper die 10 descends in place. During the descending process of the upper die 1, the edge to be bent 101 of the workpiece 10 is bent simultaneously.
[0050] The bending line 21 of the floating shaping die 2 corresponds to the A position on the workpiece 10. As Figure 7 shown, during the process of bending the workpiece 10, the upper die 1 will push the floating shaping die 2 down together. During the downward movement of the floating shaping die 2, it will also exert a reaction force on the upper die 1. Under the combined action of the upper die 1 and the floating shaping die 2, the workpiece 10 will be bent at the A position, and the bending angle is adapted to the surface shape of the upper die 1. That is, during the downward movement of the upper die 1, the edge to be folded 101 will be pushed inward. During the pushing process, the edge to be folded 101 will be bent inward around the bending line 21, so as to achieve the purpose of eliminating the draft angle.
[0051] Preferably, the outer edges on both sides of the upper die 1 extend beyond the bending line 21 by a certain distance. When the edge to be folded 101 of the workpiece 10 is bent along the bending line 21, the upper die 1 can still exert a thrust on the edge to be folded 101 that extends beyond the floating shaping die 2. Under the action of this thrust, the edge to be folded 101 that extends beyond the floating shaping die 2 can be bent inward along the bending line 21, so as to achieve a reliable bending effect on the workpiece 10.
[0052] More preferably, the working surfaces of the upper die 1 and the floating shaping die 2 cooperate with each other and are both set as curved surfaces that are in imitation of the surface of the workpiece 10. During the downward movement of the upper die 1, the lower end of the upper die 1 contacts the edge to be folded 101 of the workpiece 10 and continuously squeezes the edge to be folded 101 of the workpiece 10 inward until the edge to be folded 101 fits against the side surface of the shaping die 2, so as to achieve a reliable bending effect on the workpiece 10.
[0053] During the downward movement of the upper die 1, the floating shaping die 2 will first follow the upper die 1 down until the upper die 1 reaches the end position. Preferably, after the upper die 1 reaches the end position, it remains for a period of time, so that the bending effect of the upper die 1 on the workpiece 10 is more reliable.
[0054] Preferably, the floating shaping die 2 is provided with a mechanism for positioning and limiting the workpiece 10, so that during the process of bending the workpiece 10 by the precision bending die, the relative position between the workpiece 10 and the floating shaping die 2 will not change, thus achieving a reliable bending effect on the workpiece 10.
[0055] Therefore, the precision bending die only needs to set the cooperation between the upper die 1 and the floating shaping die 2 to achieve the bending effect on the workpiece 10. The structure is simple, the cost is low, and it can save the space occupied by the equipment.
[0056] In this implementation process, preferably, the precision bending die further includes fixed inserts 3 fixedly arranged on both sides of the floating shaping die 2. The upper surface of the fixed insert 3 is provided with a first limiting surface 31, and the surfaces on both sides of the upper die 1 opposite to the fixed inserts 3 are provided with second limiting surfaces 11, and the first limiting surface 31 cooperates with the second limiting surface 11.
[0057] The cooperation between the first limiting surface 31 and the second limiting surface 11 can limit the operation of the upper die 1.
[0058] Before the bending operation starts, the height of the floating shaping die 2 is higher than that of the fixed insert 3. After the bending operation starts, the upper die 1 descends. When the upper die 1 descends to the position of the workpiece 10, it will push the workpiece 10 and the floating shaping die 2 to descend together. During the process of joint descent, by using the action and reaction forces between the upper die 1 and the floating shaping die 2, the bending effect of the workpiece 10 can be achieved.
[0059] When the second limiting surface 11 contacts the first limiting surface 31 of the fixed insert 3, the upper die 1 is limited and cannot continue to move downward. After the upper die 1 stays for a period of time, it starts to rise, and the workpiece 10 completes the bending operation and can be taken out.
[0060] In this embodiment, preferably, a bending gap 32 is provided between the fixed insert 3 and the floating shaping die 2, and at least a part of the workpiece 10 is located in the bending gap 32.
[0061] Because during the shaping process, the to-be-folded edge 101 of the workpiece 10 will have relative movement with the fixed insert 3, and the to-be-folded edge 101 will rotate around the bending edge 21 during the descent. In order to avoid interference between the workpiece 10 and the fixed insert 3 during the bending process, a bending gap 32 is provided between the fixed insert 3 and the floating shaping die 2, and the to-be-folded edge 101 can complete the bending within this bending gap 32.
[0062] In this embodiment, preferably, a chamfered surface 33 is provided on the surface of the fixed insert 3 facing the floating shaping die 2.
[0063] By providing the chamfered surface 33, a bending gap 32 can be formed between the fixed insert 3 and the floating shaping die 2. By providing the chamfered surface 33, a V-shaped bending gap 32 is formed between the fixed insert 3 and the floating shaping die 2, which can adapt to the bending movement of the to-be-folded edge 101 within this V-shaped bending gap 32.
[0064] In this embodiment, preferably, the end portions on both sides of the workpiece 10 are in contact with the chamfered surface 33.
[0065] When the ends on both sides of the workpiece 10 are in contact with the chamfered surface 33, when the upper die 1 bends the workpiece 10, the workpiece 10 will slide downward along the chamfered surface 33, and there is also an interaction force between the workpiece 10 and the chamfered surface 33. Under the pressure of the chamfered surface 33 on the workpiece 10, the edge to be folded 101 will be pressed against the profiling surface of the upper die 1. Therefore, the bending shape of the workpiece 10 will be restricted by the shape of the surface of the upper die 1 that exceeds the floating shaping die 2. At the same time, due to the acting force of the upper die 1 on the workpiece 10 during the downward pressing process, the edge to be folded 101 also needs to be folded inward around the bending line 21, so that the workpiece 10 forms a folded edge 102 by bending inward under the control of the working surface of the upper die 1. In this way, the position state of the folded edge 102 of the workpiece 10 is more stable, that is, the product consistency of the workpiece 10 after being processed by this precise bending die is higher.
[0066] Therefore, by setting the ends on both sides of the workpiece 10 to be in contact with the chamfered surface 33, the bending shape of the workpiece 10 is restricted by the surface shape of the upper die 1, and the bending effect is more reliable.
[0067] In this embodiment, preferably, a compressible elastic member is provided at the lower end of the floating shaping die 2.
[0068] During the downward pressing of the upper die 1, the floating shaping die 2 moves downward along with the upper die 1. At this time, the compressible elastic member is compressed. When the upper die 1 rises, the pressure on the floating shaping die 2 is cancelled, and the compressible elastic member recovers its deformation and pushes the floating shaping die 2 to rise, thereby realizing the reset of the floating shaping die 2.
[0069] Preferably, the floating shaping die 2 is set as a nitrogen spring. Since the elastic force of the nitrogen spring has a non-linear relationship with the compression amount, its elastic force is not greatly affected by the deformation amount. Therefore, during the lifting process of the floating shaping die 2, using a nitrogen spring can make the pressure received by the floating shaping die 2 more stable.
[0070] The present invention also provides a draft angle shaping method. This draft angle shaping method uses a precise bending die, including:
[0071] Step 1: Place the workpiece 10 on the floating shaping die 2;
[0072] Step 2: Lower the upper die 1 until it contacts the workpiece 10;
[0073] Step 3: The upper die 1 pushes the floating die and the workpiece 10 to descend together, and shaping is completed during the descending process;
[0074] Step 4: The upper die 1 rises, and the workpiece 10 is taken out.
[0075] First, place the workpiece 10 on the floating shaping die 2. The positioning mechanism on the floating shaping die 2 can also limit the position of the workpiece 10. Subsequently, the upper die 1 descends until it contacts the workpiece 10. After contact, when the upper die 1 continues to descend, it will exert pressure on the floating shaping die 2. Under the action of this pressure, the edge to be folded 101 of the workpiece 10 starts to bend around the bending line 21 and finally becomes the state of the folded edge 102.
[0076] After the bending operation is completed, the upper die 1 rises, the floating shaping die 2 resets, and the workpiece 10 is taken out.
[0077] Preferably, the pressure value received by the workpiece 10 during the bending process is related to the elastic force value of the compressible elastic component below the floating shaping die 2. Therefore, by reasonably setting the compressible elastic component, an ideal bending effect can be obtained during the bending process.
[0078] In this embodiment, preferably, in step three, the ends on both sides of the workpiece 10 slide along the chamfered surface 33 of the fixed insert 3.
[0079] When the upper die 1 bends the workpiece 10, the workpiece 10 slides downward along the chamfered surface 33. At this time, there is also an interaction force between the workpiece 10 and the chamfered surface 33. Under the pressure of the chamfered surface 33 on the workpiece 10, the edge to be folded 101 will be pressed against the profiling surface of the upper die 1. At the same time, due to the downward pressure of the upper die 1 on the workpiece 10, the edge to be folded 101 can only bend inward around the bending line 21, and the bending shape is limited by the surface shape of the part of the upper die 1 that exceeds the floating shaping die 2.
[0080] Therefore, by setting the ends on both sides of the workpiece 10 to contact the chamfered surface 33, the shape of the workpiece 10 after bending is limited by the surface shape of the upper die 1, and the bending effect is more reliable.
[0081] Such as Figure 8 A stamping device for continuous production as described above includes a plurality of continuously arranged stamping processes 42 and a robotic arm 41 for picking and placing the workpiece 10 corresponding to each of the plurality of stamping processes 42 one by one. The precision bending die 5 is set as one of the plurality of stamping processes 42.
[0082] The plurality of stamping processes 42 produce the same kind of workpiece, which can realize the collaborative production of multiple workpieces. The robotic arm 41 picks and places the workpiece 10. The robotic arm 41 removes the product produced by the previous stamping process 42 and places it in the next stamping process 42 as the raw material for the next stamping process 42. In this way, multiple processes of the same workpiece can be carried out simultaneously, improving the processing efficiency of the workpiece.
[0083] Since the precision bending die 5 no longer uses the shaping modules on both sides but realizes shaping through the cooperation of the upper die 1 and the floating shaping die 2, the space occupied by the precision bending die 5 is less. Then, the precision bending die 5 and other stamping equipment can be arranged more compactly together, enabling the precision bending die 5 to be applied to stamping equipment for continuous production.
[0084] In this embodiment, preferably, the stamping processes 42 are arranged in a straight line, and multiple stamping processes 42 share one press, and the press drives the upper die 1 to move up and down.
[0085] Multiple stamping processes 42 share one press. In this way, when the press works once, it can complete one operation on all the stamping processes 42, and the last stamping process 42 can output one product. Therefore, and the collaborative operation of multiple processes can also save costs to the greatest extent. Using the same press can achieve the work of multiple processes, and can also greatly improve the work efficiency.
[0086] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention.
[0087] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable way without conflict. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.
[0088] In addition, any combination can be made between various different embodiments of the present invention, as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.
Claims
1. A precise bending die, characterized in that, It includes an upper die (1) that makes a lifting motion and a floating shaping die (2) that can lift and cooperate with the upper die (1). The lower surface of the upper die (1) is provided with a curved surface that is conformable to the surface of the workpiece (10). The upper surface of the floating shaping die (2) is provided with a curved surface that is conformable to the surface of the workpiece (10). Bend lines (21) are provided on both sides of the floating shaping die (2). The upper die (1) cooperates with the bend lines (21) to bend the workpiece (10) at the positions of the bend lines (21).
2. The precision bending die according to claim 1, characterized in that, The precision bending die further includes fixed inserts (3) fixedly arranged on both sides of the floating shaping die (2). The upper surface of the fixed inserts (3) is provided with a first limiting surface (31). The surfaces on both sides of the upper die (1) opposite to the fixed inserts (3) are provided with second limiting surfaces (11). The first limiting surface (31) cooperates with the second limiting surface (11).
3. The precise bending die according to claim 2, characterized in that, A bending gap (32) is provided between the fixed inserts (3) and the floating shaping die (2). At least a part of the workpiece (10) is located in the bending gap (32).
4. The precision bending die according to claim 3, characterized in that, One side of the fixed insert (3) facing the floating shaping die (2) is provided with a chamfered surface (33).
5. The precise bending die according to claim 4, wherein, The ends on both sides of the workpiece (10) are in contact with the chamfered surface (33).
6. The precision bending die according to claim 5, wherein A compressible elastic member is provided at the lower end of the floating shaping die (2).
7. A draft angle shaping method, characterized in that, The draft angle shaping method uses the precision bending die described in claim 6, including: Step 1: Place the workpiece (10) on the floating shaping die (2). Step 2: Lower the upper die (1) until it contacts the workpiece (10). Step 3: The upper die (1) pushes the floating die and the workpiece (10) to descend together, and shaping is completed during the descent. Step 4: Raise the upper die (1) and take out the workpiece (10).
8. The shaping method for the reverse mold angle according to claim 7, wherein In step 3, the ends on both sides of the workpiece (10) slide along the chamfered surface (33) of the fixed insert (3).
9. A stamping device for continuous production, characterized in that, It includes a plurality of stamping processes (42) arranged continuously and a robotic arm (41) for picking and placing the workpiece (10) corresponding to each of the plurality of stamping processes (42). The precision bending die (5) described in claim 6 is arranged as one of the plurality of stamping processes (42).
10. The stamping device according to claim 9, characterized in that, The plurality of stamping processes (42) are arranged in a straight line, and the plurality of stamping processes (42) share one press, and the press drives the upper die (1) to lift and lower.