Drawing die

By providing a second pressing mechanism with adjustable height in the drawing mold, the problem of excessive vertical length of the drawing mold surface supplementary cross-section in the prior art is solved, which improves material utilization, reduces costs, and improves product quality and mold life.

CN222679256UActive Publication Date: 2025-03-28CHONGQING CHANGAN AUTOMOBILE CO LTD
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Patent Information

Application Number
CN202421374998.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-17
Publication Date
2025-03-28
Estimated Expiration
2034-06-17

AI Technical Summary

Technical Problem

In the prior art, the vertical length of the drawing die surface supplementary section of the automobile stamping parts is relatively long and the material utilization rate is low, resulting in high material usage cost, and the deep drawing depth is easy to cause hair pulling, affecting the quality of the part and mold life.

Method used

A drawing mold including an upper mold seat, a first edge pressing member, a lower mold seat and a mould is designed. By providing a second edge pressing mechanism with adjustable height, the vertical height of the second edge pressing point is increased, thereby shortening the vertical length of the supplementary cross-section, improving material utilization and reducing cost.

Benefits of technology

By shortening the vertical length of the supplementary cross-section, the material utilization rate is improved, the material usage cost is reduced, and the product quality risks and mold life problems caused by deep drawing depth are reduced.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of automobile stamping dies, in particular to a drawing die which comprises an upper die base, a first blank pressing piece, a lower die base and a male die, a first blank pressing point position and a second blank pressing point position are arranged between the upper die base and the first blank pressing piece, the vertical height of the first blank pressing point position is lower than that of the second blank pressing point position, and the lower die base and the male die are arranged on the lower die base. A second edge pressing mechanism with the adjustable height is arranged on the side, close to the lower die base, of the upper die base, and the second edge pressing mechanism is used for being matched with the upper die base to pre-press the plate. The drawing die surface is used for solving the problems that in the prior art, the vertical length of the supplementary section of the drawing die surface is large, the material utilization rate is low, and the material use cost is high.
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Description

Technical Field

[0001] The utility model relates to the technical field of automobile stamping dies, in particular to a drawing die. Background Art

[0002] At present, the automobile industry is booming, and the competition among automobile companies is becoming increasingly fierce. How to reduce costs while ensuring quality has become one of the keys for companies to win in the competition. The mold industry is part of the automobile industry, and molds are important tools for producing automobile body-in-white panels. Therefore, the design of molds is particularly critical.

[0003] Before automobile body-in-white panels are formed by die stamping, it is generally necessary to design the die surface for the stamping and drawing process. Die surface design is an important part of the die surface for the drawing process. The quality of die surface design directly determines the quality and cost of panel forming. Material utilization rate is a direct reflection of cost.

[0004] The drawing die surface is generally composed of three parts: product, process supplement, and pressing surface. Take the front cover inner plate of the automobile stamping part in the prior art as an example: its top view ( Figure 1 ) and cross-sectional view ( Figure 2 ), the corresponding drawing die is as follows Figure 4 As shown, it includes an upper die base 10, a first edge clamp 20, a lower die base 30 and a punch 50. The punch 50 is fixed on the lower die base 30. A guide plate 46 for mutual guidance is installed between the punch 50 and the first edge clamp 20. A third cushion block 45 is installed above the first edge clamp 20 to balance the edge clamping force between the large edge ring 20 and the upper die base 10. The third cushion block 45 is also installed on the bottom surface of the first edge clamp 20. The third cushion block 45 is in contact with the ejector 21, and the machine tool applies force and the ejector 21 to transmit it to the first edge clamp 20. The third cushion block 45 is also installed on the bottom surface of the first edge clamp 20 corresponding to the position of the lower die base 30.

[0005] Since the shape difference between the first point 101 of the front cover inner plate and the second point 102 of the front cover inner plate is large, and the first edge holding point of the mold corresponding to the first point 101 and the second edge holding point corresponding to the second point 102 need to be kept horizontal, after the mold stretches the sheet, the drawing die surface ( Figure 3 ) has a long vertical length of the supplementary section 022 (i.e., the vertical height from the supplementary section 022 to the pressing surface section 032 is long), the material utilization rate is low, the material use cost is high, and due to the deep local drawing depth, the drawing process parts are prone to burrs on the side walls, affecting the part quality and mold life. Utility Model Content

[0006] One of the purposes of the utility model is to provide a drawing die to solve the problems in the prior art that the vertical length of the supplementary section of the drawing die surface is long, the material utilization rate is low, and the material use cost is high.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] The present application discloses a drawing die, comprising an upper die base, a first edge clamping piece, a lower die base and a punch, wherein a first edge clamping point and a second edge clamping point are arranged between the upper die base and the first edge clamping piece, wherein the vertical height of the first edge clamping point is lower than the vertical height of the second edge clamping point, and a second edge clamping mechanism with adjustable height is arranged on one side of the upper die base close to the lower die base, and the second edge clamping mechanism is used for cooperating with the upper die base to pre-press the sheet material.

[0009] By setting the above structure, the vertical height of the second edge pressing point is increased relative to the first edge pressing point, thereby shortening the vertical length of the supplementary section, thereby improving material utilization, reducing material use costs, and at the same time solving the product quality risks caused by the deep drawing depth.

[0010] Furthermore, the second edge clamping mechanism includes a second edge clamping member and a pressure member. An installation area is opened on the upper mold base. The second edge clamping member is slidably arranged in the installation area. The pressure member is fixedly installed in the installation area. The pressure member is used to apply vertical downward pressure to the second edge clamping member so that the second edge clamping member is pressed tightly against the sheet material.

[0011] By setting the above structure, the second edge clamping member and the pressure member are separately arranged, which, on the one hand, improves the stability of the second edge clamping member during operation, and, on the other hand, facilitates subsequent maintenance.

[0012] Furthermore, a limiting member is provided between the second edge clamping member and the upper die seat, and the limiting member is used to limit the sliding range of the second edge clamping member.

[0013] By providing the above structure, the second edge clamping member will not be separated from the upper die seat.

[0014] Furthermore, guide members are provided on both sides of the second edge clamping member, and the guide members are used to guide the sliding second edge clamping member.

[0015] By providing the above structure, the second edge holding member can move vertically stably.

[0016] Furthermore, a mounting plate is fixedly mounted on the upper die base, and the pressure piece is fixedly mounted on the mounting plate.

[0017] By providing the above structure, it is convenient to install the pressure piece for subsequent maintenance.

[0018] Furthermore, a first cushion block is provided between the pressure member and the second edge holding member.

[0019] By setting the above structure, the pressure piece applies pressure to the second edge clamping piece through the first cushion block, thereby reducing the wear of the pressure piece and the second edge clamping piece.

[0020] Furthermore, a second cushion block is provided on the male mold.

[0021] The above structure is provided to balance the blanking forces of the second blanking member and the punch.

[0022] Furthermore, the second edge clamping mechanism is located on a side close to the second edge clamping point.

[0023] Beneficial effects of the utility model:

[0024] The utility model sets a second edge pressing mechanism, which is used to cooperate with the upper die seat to pre-press the sheet material, and then the vertical height of the first edge pressing point is lower than the vertical height of the second edge pressing point. The vertical length of the supplementary section during drawing is shortened, thereby improving material utilization, reducing material use costs, and solving the product quality risks caused by the deep drawing depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a top view of the inner plate of the front cover of an automobile stamping part in the prior art;

[0026] Figure 2 It is an AA cross-sectional view of the inner plate of the front cover of an automobile stamping part in the prior art;

[0027] Figure 3 It is a cross-sectional view of the die surface of the drawing process in the prior art;

[0028] Figure 4 It is a cross-sectional view of a drawing die mechanism in the prior art;

[0029] Figure 5 It is a cross-sectional view of a drawing die surface of a drawing die of the utility model;

[0030] Figure 6 This is a cross-sectional view of a drawing die of the utility model;

[0031] Figure 7 It is a partial enlarged cross-sectional view of a drawing die of the utility model;

[0032] in,

[0033] 100, sheet material; 101, first edge-holding point; 102, second edge-holding point; 022, supplementary section; 032, section of the pressing surface;

[0034] 10. Upper die seat;

[0035] 20. first edge holding member; 21. ejector rod;

[0036] 30. Lower die seat;

[0037] 40. Second edge pressing member; 41. Mounting plate; 42. Screw sleeve; 43. Fixing screw; 44. Pressure member; 45. Third cushion block; 46. Guide member; 47. First cushion block;

[0038] 50. Punch; 51. Second cushion block. DETAILED DESCRIPTION

[0039] The following will describe the implementation of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0040] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0041] like Figure 5-Figure 7 As shown, this embodiment provides a drawing die, including an upper die base 10, a first edge clamping member 20, a lower die base 30 and a punch 50, a first edge clamping point 101 and a second edge clamping point 102 are arranged between the upper die base 10 and the first edge clamping member 20, and the vertical height of the first edge clamping point 101 is lower than the vertical height of the second edge clamping point 102 (such as Figure 6 As shown in the figure, after the vertical height of the second edge pressing point 102 is increased, the horizontal height of the pressing surface section 032 is increased, thereby shortening the vertical length of the supplementary section 022 (that is, the vertical height from the supplementary section 022 to the pressing surface section 032 is shortened), thereby improving material utilization, reducing material use costs, and at the same time solving the product quality risks caused by the deeper drawing depth.

[0042] In this embodiment, a second edge clamping mechanism with adjustable height is provided on one side of the upper die holder 10 close to the lower die holder 30, and the second edge clamping mechanism is located on the side close to the second edge clamping point 102. Since the vertical height of the first edge clamping point 101 is lower than the vertical height of the second edge clamping point 102, when the mold is stretched, the heights of the first edge clamping point 101 end and the second edge clamping point 102 end of the upper die holder 10 are different. The second edge clamping mechanism with adjustable height replaces the second edge clamping point 102 end of the upper die holder 10 and cooperates with the first edge clamping point 101 end of the upper die holder 10 to pre-clip the sheet material 100. Then, the upper die holder 10 contacts the first edge clamping member 20 to press the sheet material 100. During this process, the second edge clamping mechanism is gradually pushed upward by the sheet material 100 while maintaining the pressing state.

[0043] In this embodiment, the second edge clamping mechanism includes a second edge clamping member 40 and a pressure member 44. In some other embodiments, the pressure member 44 can also be directly fixedly connected to the second edge clamping member 40. In this embodiment, the second edge clamping member 40 and the pressure member 44 are separately arranged. On the one hand, the stability of the second edge clamping member 40 during operation is improved, and on the other hand, it is convenient for later maintenance. An installation area is provided on the upper die seat 10, and the second edge clamping member 40 is slidably arranged in the installation area, and the pressure member 44 is fixedly installed in the installation area. In normal state, the pressure member 44 applies vertical downward pressure to the second edge clamping member 40, so that the second pressure member 44 slides down to the lowest end of the installation area. When working, the pressure member 44 applies vertical downward pressure to the second edge clamping member 40, so that the second edge clamping member 40 is pressed against the sheet 100. In this embodiment, the pressure member 44 is a nitrogen cylinder or a nitrogen spring.

[0044] In this embodiment, a mounting plate 41 is fixedly mounted on the upper die base 10 , and the pressure member 44 is fixedly mounted on the mounting plate 41 , so as to facilitate installation of the pressure member 44 and facilitate subsequent maintenance.

[0045] In this embodiment, a limiting member is provided between the second edge clamping member 40 and the upper die base 10, and the limiting member is used to limit the sliding range of the second edge clamping member 40 so that the second edge clamping member 40 will not be separated from the upper die base 10. Specifically, the limiting member is provided as a screw sleeve 42 and a fixing screw 43, and the screw sleeve 42 is fixedly mounted on the mounting plate 41. In some other embodiments, the screw sleeve 42 can also be mounted on the upper die base 10 through a mounting frame. The lower end of the fixing screw 43 is fixedly connected to the second edge clamping member 40, and the upper end of the fixing screw 43 is slidably disposed in the screw sleeve 42. In some other embodiments, the limiting member can also be provided with a limiting block in the mounting area to limit the range of motion of the second edge clamping member 40.

[0046] In this embodiment, guide members 46 are provided on both sides of the second edge clamping member 40 , and the guide members 46 are used to guide the sliding second edge clamping member 40 so that the second edge clamping member 40 can move vertically stably.

[0047] A first cushion block 47 is provided between the pressure member 44 and the second edge clamping member 40. The pressure member 44 applies pressure to the second edge clamping member 40 through the first cushion block 47 to reduce the wear of the pressure member 44 and the second edge clamping member 40. A second cushion block 51 is provided on the punch 50 to balance the edge clamping force of the second edge clamping member 40 and the punch 50.

[0048] Combined with the existing technical structure, the use principle of this embodiment is as follows:

[0049] When not in operation, the upper die base 10 is located above the lower die base 30 , the first edge clamping member 20 and the punch 50 , and the second edge clamping member 40 slides down to the lowest end of the installation area under the action of gravity and the pressure of the pressure member 44 .

[0050] When working:

[0051] First, the push rod 21 moves upward, and the push rod 21 contacts the third pad 45 on the ground of the first edge clamp 20, applying an upward thrust to the first edge clamp 20, so that the first edge clamp 20 moves upward to a certain distance. During this process, the upper die holder 10 moves downward until the second edge clamp 40 contacts the sheet 100.

[0052] Subsequently, the upper die holder 10 continues to move downward, and the second edge clamping member 40 applies vertical downward pressure, so that the second edge clamping member 40 is pressed against the sheet material 100. During this process, the first edge clamping point 101 end of the upper die holder 10 contacts the sheet material 100, and the first edge clamping point 101 end of the upper die holder 10 cooperates with the second edge clamping member 40 to pre-clip the sheet material 100.

[0053] Then, the upper die seat 10 continues to move downward, pushing the first edge clamp 20 downward until the third cushion block 45 at the bottom of the first edge clamp 20 contacts the lower die seat 30 and stops, and the entire drawing process ends.

[0054] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A drawing die, comprising an upper die base (10), a first edge clamp (20), a lower die base (30) and a punch (50), characterized in that: A first edge clamping point (101) and a second edge clamping point (102) are arranged between the upper die seat (10) and the first edge clamping member (20); the vertical height of the first edge clamping point (101) is lower than the vertical height of the second edge clamping point (102); a second edge clamping mechanism with adjustable height is arranged on one side of the upper die seat (10) close to the lower die seat (30); the second edge clamping mechanism is used to cooperate with the upper die seat (10) to pre-press the sheet material (100).

2. A drawing die according to claim 1, characterized in that: The second edge clamping mechanism comprises a second edge clamping member (40) and a pressure member (44); an installation area is provided on the upper die base (10); the second edge clamping member (40) is slidably arranged in the installation area; the pressure member (44) is fixedly installed in the installation area; the pressure member (44) is used to apply vertical downward pressure to the second edge clamping member (40) so that the second edge clamping member (40) is pressed tightly against the sheet material (100).

3. A drawing die according to claim 2, characterized in that: A limiting member is provided between the second edge clamping member (40) and the upper die seat (10), and the limiting member is used to limit the sliding range of the second edge clamping member (40).

4. A drawing die according to claim 2, characterized in that: Guide members (46) are provided on both sides of the second edge clamping member (40), and the guide members (46) are used to guide the sliding second edge clamping member (40).

5. A drawing die according to claim 2, characterized in that: A mounting plate (41) is fixedly mounted on the upper die base (10), and the pressure piece (44) is fixedly mounted on the mounting plate (41).

6. A drawing die according to claim 2, characterized in that: A first cushion block (47) is provided between the pressure piece (44) and the second edge-holding piece (40).

7. A drawing die according to claim 1, characterized in that: A second cushion block is arranged on the male mold (50).

8. A drawing die according to claim 1, characterized in that: The second edge pressing mechanism is located on a side close to the second edge pressing point (102).