A drawing die material feeding device

Abstract

The present application relates to a kind of drawing die material supporting device, it includes male die, lower bottom plate, upper segment assembly, lower segment assembly and binder ring;Male die has first through-hole that passes through up and down, and the upper end of male die has drawing male die surface;Lower bottom plate has second through-hole corresponding with first through-hole, and male die is fixed above lower bottom plate;Upper segment assembly is movably arranged in first through-hole and is limited to fall off from the upper end and lower end of male die, and the upper end of upper segment assembly has material supporting profile;Lower segment assembly is movably arranged in second through-hole and is limited to fall off from the upper end and lower end of lower bottom plate, and the upper end of lower segment assembly is in contact with the lower end of upper segment assembly;Binder ring is sleeved on the outside of male die, and the upper end of binder ring has binder profile, which can affect the deformation of sheet metal during sheet metal closing process, so that the drawing die material supporting device can be applied to drawing material supporting work of different inner surface parts and outer surface parts.

Description

Technical Field

[0001] This invention relates to the field of drawing die material support, and more specifically to a drawing die material support device. Background Technology

[0002] In the body exterior panels, the sheet metal used for stamping is all thin sheet metal less than 1mm thick, and all are large sheet metal exceeding 1 square meter in size. During the stamping and drawing process, after the sheet metal is placed into the die, it first collapses due to its own weight. Secondly, during the closing process of the blank holder, due to the lack of support in the middle, the sheet metal will develop wrinkles of varying degrees and instability. Ultimately, this affects the appearance quality of the parts, potentially leading to wrinkles that prevent production, or dents that negatively impact customer experience.

[0003] To address the existing problem of sheet metal collapse, a corresponding mechanism or device needs to be installed under the sheet metal to support it, namely a drawing die material support device. Patent application CN202011054733.5 discloses a rear door inner panel drawing die with a material support device. This die includes an upper die and a lower die base facing each other. A punch is mounted on the lower die base, and a pressure ring is installed between the punch and the lower die base. It also includes a material support device, which is fastened to the lower die base via the punch. The material support device includes: a body, a retaining block, a lifting insert, a stroke limiting bolt, and a bottom push rod. This solves the problems of sheet metal collapse and wrinkling during forming, reduces manufacturing costs, and rises and falls with the push rod, eliminating the need to adjust the steering valve and reducing adjustment difficulty.

[0004] However, in actual use, it was found that the lifting insert used in this device is fixed to the top of the main body. The main body is pushed by the push rod, which in turn drives the lifting insert to extend from the punch. Due to the structural limitations of the lifting through hole, the lifting insert is generally a cylindrical or prismatic structure, which can only support the collapse of the sheet metal under natural gravity. When the upper and lower dies are closed, the sheet metal posture cannot be changed during the closing state of the pressure ring. Therefore, the existing technical solution is only suitable for some inner surface parts, and not for the drawing and supporting of outer surface parts. Furthermore, since the existing technical solution uses a power source to directly drive the support components, the lifting and assembly process of the punch and the supporting device is very inconvenient during mold manufacturing, debugging and maintenance. Summary of the Invention

[0005] Based on the above description, the present invention provides a drawing die support device to solve the above-mentioned technical problems in the prior art.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0007] A drawing die support device includes a punch, a lower base plate, an upper section assembly, a lower section assembly, and a pressure ring;

[0008] The punch has a first through hole running vertically through the top and bottom, and the upper end of the punch has a drawing punch surface;

[0009] The lower base plate has a second through hole corresponding to the first through hole, and the punch is fixed above the lower base plate;

[0010] The upper component is movably disposed in the first through hole and is restricted from falling off from the upper and lower ends of the punch. The upper end of the upper component has a material support surface.

[0011] The lower section assembly is movably disposed in the second through hole and is restricted from falling off from the upper and lower ends of the lower base plate. The upper end of the lower section assembly contacts the lower end of the upper section assembly, and the lower end of the lower section assembly is used to contact the top rod extending from the lower end of the second through hole.

[0012] The pressure ring is fitted onto the outside of the punch, and the upper end of the pressure ring has a pressure profile.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0014] The drawing die support device provided in this application effectively achieves the limiting installation of the upper section component with the punch and the lower section component with the bottom plate through the setting of the upper section component and the lower section component. In the assembly process, the upper section component and the lower section component are first installed into the punch and the bottom plate respectively. Then, the punch containing the upper section component is fixed on the bottom plate. Since the upper end of the upper section component has a material support surface, it ensures that the sheet metal is deformed smoothly. It can play a role in the deformation of the sheet metal during the closing process, so that the drawing die support device can be used for drawing support work of different inner surface parts and outer surface parts.

[0015] Based on the above technical solution, the present invention can be further improved as follows.

[0016] Furthermore, the upper component includes a material support insert, a material support base, and an upper guide plate; the material support insert is disposed at the upper end of the material support base, the material support profile is located at the top of the material support insert, the upper guide plate is connected to the side of the material support base, and the first through hole has an upper guide surface that contacts and guides the upper guide plate.

[0017] Furthermore, the upper part of the first through hole has an upper limit portion, the lower end of which engages with the upper end face of the material support to limit the material support from disengaging from the upper end of the first through hole to the punch; the upper section assembly also includes a first limiting bracket, which is connected to one side of the material support, and the lower part of the first through hole has an upper middle limiting member that engages with the first limiting bracket to limit the material support from falling off from the lower end of the first through hole.

[0018] Furthermore, the upper end of the material support is provided with a plurality of pre-compression elastic elements along the circumferential direction. When the material support moves upward, the upper end of the pre-compression elastic elements is used to contact the upper limit part and undergo elastic deformation.

[0019] Furthermore, the number of the first limiting brackets is even and at least 2, and the first limiting brackets are symmetrically arranged on both sides of the material support; the number of the upper guide plates is even and at least 4, and the upper guide plates are symmetrically arranged on both sides of the material support.

[0020] Furthermore, the lower section assembly includes a material support transmission block and a lower guide plate. The lower guide plate is connected to the side of the material support transmission block, and the second through hole has a lower guide surface that contacts and guides the lower guide plate.

[0021] Furthermore, the lower part of the second through hole has a lower limiting block, the upper end of which cooperates with the lower end of the material-supporting transmission block to limit the material-supporting transmission block from falling off from the lower end of the second through hole; the lower section assembly also includes a second limiting platform, which is connected to one side of the material-supporting transmission block, and the upper part of the second through hole has a middle and lower limiting block that cooperates with the second limiting platform to limit the material-supporting transmission block from detaching from the upper end of the second through hole from the lower base plate.

[0022] Furthermore, the number of the second limiting brackets is even and at least 2, and the second limiting brackets are symmetrically arranged on both sides of the material support transmission block; the number of the lower guide plates is even and at least 4, and the lower guide plates are symmetrically arranged on both sides of the material support transmission block.

[0023] Furthermore, the distance between the upper guide plate and the upper guide surface is set to L1, and the distance between the lower guide plate and the lower guide surface is set to L2. The absolute value of the difference between L1 and L2 is the gap S, where S satisfies: 1mm≤S≤3mm.

[0024] Furthermore, the material support surface is a smooth curved surface that convexes upwards, and the curvature trend of the material support surface and the material pressing surface is consistent; the edge of the material support surface has a chamfer, and the radius of the chamfer is not less than 5mm. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a drawing die support device provided in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the upper and lower components in an embodiment of the present invention;

[0027] Figure 3This is a schematic diagram of the upper and lower limits of the upper component in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the limiting structure of the second limiting platform and the middle and lower limiting block in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the material support surface and the material pressing surface in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the initial state when used in an embodiment of the present invention. Detailed Implementation

[0031] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0033] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90° or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0034] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0035] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0036] like Figure 1 As shown, this application provides a drawing die support device, which includes a punch 10, a lower base plate 20, an upper section assembly 30, a lower section assembly 40, and a pressure ring 50.

[0037] The punch 10 has a first through hole 10a extending in the vertical direction, and the upper end of the punch 10 has a drawing punch surface 11.

[0038] The punch 10 of this application, like the punches of other drawing die structures, is located at the bottom and is part of the lower die. An upper base plate 100 is provided above it and is driven to rise and fall by a drive mechanism. The lower end face of the upper base plate 100 has a drawing concave die face that is the same as the drawing punch face 11. During the die closing process, the sheet metal is drawn and deformed by the cooperation of the upper base plate 100 and the punch.

[0039] The lower base plate 20 has a second through hole 20a corresponding to the first through hole 10a, and the punch 10 is fixed above the lower base plate 20.

[0040] In an optional embodiment, the punch 10 is fixed to a specific position on the lower base plate 20 by means of positioning pins and fastening bolts, so as to ensure the connection between the through hole 10a and the second through hole 20.

[0041] The upper component 30 is movably disposed in the first through hole 10a and is restricted from falling off from the upper and lower ends of the punch 10. The upper end of the upper component 30 has a material support surface 31a.

[0042] Depending on its strength and material, the upper component can be made into a split structure or an integral structure. Regardless of the structure, the upper end of the upper component 30, namely the material support surface 31a, can extend from the upper end of the first through hole 10a to ensure contact between the material support surface 31a and the sheet material, thereby intervening in the deformation of the sheet material.

[0043] In the embodiments of this application, the upper component is a split structure, which includes a material support insert 31, a material support base 32, and an upper guide plate 33.

[0044] The blank holding insert 31 is disposed at the upper end of the blank holding seat 32. The blank holding insert 31 and the blank holding seat 32 are fixed into a whole by screws, positioning pins, etc. Among them, the blank holding surface 31a is located at the top of the blank holding insert 31. The upper guide plate 33 is connected to the side surface of the blank holding seat 32, and the inner part of the first through hole 10a has an upper guide surface that contacts and guides the upper guide plate 33.

[0045] The upper part of the first through hole 10a has an upper limit portion 101. The lower end of the upper limit portion 101 is matched and limited with the upper end surface of the blank holding seat 32 to limit the blank holding seat 32 from disengaging from the upper end of the first through hole 10a of the punch 10.

[0046] Preferably, the upper limit portion 101 is formed by the part of the first through hole 10a near the upper end outlet extending inward. The blank holding insert 31 is located at the upper end of the blank holding seat 32, and the whole is generally in a "convex" shape structure. The lower part of the "convex" shape structure is the blank holding seat 32, and the upper part is the blank holding insert 31. The opening formed in the middle of the upper limit portion 101 only allows the blank holding insert 31 to extend out of the first through hole 10a, so as to effectively limit the blank holding seat 32 and prevent the blank holding seat 32 from disengaging from the upper end of the first through hole 10a of the punch 10.

[0047] Correspondingly, the upper segment assembly 30 further includes a first limit hanging platform 34. The first limit hanging platform 34 is connected to one side of the blank holding seat 32. The lower part of the first through hole 10a has an upper middle limit member 102 that cooperates with the first limit hanging platform 34 to limit the blank holding seat 32 from falling off from the lower end of the first through hole 10a.

[0048] Preferably, the upper middle limit member 102 is an upper limit block installed at the lower end opening of the first through hole 10a. More preferably, the upper limit block is fixedly installed on the bottom surface of the punch 10 by bolts, and a part of it extends below the diameter of the first through hole 10a to achieve the limit of the blank holding seat 32 and prevent the blank holding seat 32 from falling off from the lower end of the first through hole 10a.

[0049] Among them, a plurality of preloading elastic members 321 are circumferentially arranged at the upper end of the blank holding seat 32. When the blank holding seat 32 moves upward, the upper ends of the preloading elastic members 321 are used to contact the upper limit portion 10 and undergo elastic deformation.

[0050] Preferably, the multiple pre-compression elastic elements 321 are 4 to 6 pre-compression springs circumferentially distributed and installed on the upper end of the material support base 32. In the prior art, after the ejector rod completes the material support work, the material support device returns to its initial state only by its own gravity. However, if the movement clearance of the components is poor and causes stagnation, it will affect the mold closing process and even cause mold breakage and other problems. Therefore, during the material support process, the pre-compression spring is compressed. When the ejector rod 5 descends, the material support device is subjected to the downward elastic force of the pre-compression spring and its own gravity, and can descend smoothly to avoid movement jamming.

[0051] In this application, in order to ensure the stability of the material support 32 when the first limiting platform 34 is limited to the upper limit block, the number of the first limiting platform is even and at least 2. In this embodiment, the number is 4, and the 4 first limiting platforms 34 are symmetrically arranged on both sides of the material support.

[0052] To ensure smooth movement of the upper component 30 as a whole, in this application, the number of upper guide plates 33 is even and at least 4, and the upper guide plates 33 are symmetrically arranged on both sides of the material support 32; to ensure precise guidance between the material support 32 and the punch 10.

[0053] The lower section component 40 is movably disposed in the second through hole 20a and is restricted from falling off from the upper and lower ends of the lower base plate 20. The upper end of the lower section component 40 contacts the lower end of the upper section component 20, and the lower end of the lower section component 40 is used to contact the top rod 200 extending from the lower end of the second through hole 20a.

[0054] Specifically, the lower section component 40 includes a material support transmission block 41 and a lower guide plate 42. The lower guide plate 42 is connected to the side of the material support transmission block 41, and the second through hole 20a has a lower guide surface that contacts and guides the lower guide plate 42.

[0055] The upper end of the material support transmission block 41 contacts the lower end of the material support seat 32, and the power is transmitted through the contact surface. This power transmission method is stable and efficient. The material support transmission block 41 transmits the upward force of the press push rod 200 to the material support seat 32, so that the material support profile 31a can change the deformation trend of the sheet before the die pressure ring closes.

[0056] In an embodiment of this application, the lower part of the second through hole 20a has a lower limiting block 201, the upper end of the lower limiting block 201 cooperates with the lower end of the material conveying block 41 to limit the material conveying block 41 from falling off the lower end of the second through hole 20a.

[0057] Preferably, the lower limit block 201 is positioned near the lower opening of the second through hole 20a for contact and limiting with the material conveying block 41. The lower end of the lower base plate 20 is not completely open, and its bottom surface has a sealing plate with a through hole for the top rod 200 to extend into. The upper end surface of the lower limit block 201 is slightly higher than the top surface of the sealing plate to prevent the material conveying block 41 from directly contacting the sealing plate.

[0058] The lower section component 40 also includes a second limiting platform 43, which is connected to one side of the material conveying block 41. The upper part of the second through hole 20a has a middle and lower limiting block 202 that cooperates with the second limiting platform 43 to limit the material conveying block 41 from disengaging from the upper end of the second through hole 20a to the lower base plate 20.

[0059] In this embodiment, the lower limiting block 202 is installed on the upper end surface of the lower base plate 20. The lower base plate 20 has a groove around the upper opening of the second through hole 20a. The lower limiting block 202 is installed in the groove by bolts. The lower limiting block 202 extends towards the center and partially extends into the diameter of the second through hole 20a, corresponding to the second limiting bracket 43 to form a limiting fit.

[0060] In some preferred embodiments of this application, the number of the second limiting brackets 43 is even and at least 2. The second limiting brackets 43 are symmetrically arranged on both sides of the material conveying block 41. Specifically, in this embodiment, the number of the second limiting brackets 43 is 4.

[0061] To ensure the movement guidance between the material support transmission block 41 and the lower base plate 20, the number of lower guide plates 42 is even and at least 4. The lower guide plates 42 are symmetrically arranged on both sides of the material support transmission block 41. Specifically, in this embodiment, the number of lower guide plates 42 is 4.

[0062] To reduce interference or uneven movement of assembled components due to assembly errors, the following design requirements are generally required in the practical application of this application:

[0063] The distance between the upper guide plate 33 and the upper guide surface is set as L1, and the distance between the lower guide plate 42 and the lower guide surface is set as L2. The absolute value of the difference between L1 and L2 is the gap S, where S satisfies: 1mm≤S≤3mm.

[0064] The pressure ring 50 is fitted onto the outside of the punch 10, and the upper end of the pressure ring 40 has a pressure profile 50a.

[0065] In a preferred embodiment of the present application, the blank holding surface 31a is a smooth upwardly convex curved surface. Among them, the curvature trends of the blank holding surface 31a and the blank pressing surface 50a are consistent. The curvature trend of the blank holding surface 31a remains consistent with that of the blank pressing surface 50a. During the closing process of the external blank pressing area, under the downward pressure of the upper bottom plate 100, the sheet metal follows the deformation of the blank holding surface 31a of the blank holding insert 31, gradually conforms to the blank holding surface 31a, and maintains no wrinkles and no depressions, and is highly consistent with the trend of the peripheral blank pressing surface 50a.

[0066] In order to prevent scratching the sheet metal, the edge of the blank holding surface 31a has a chamfer, and the radius of the chamfer is not less than 5 mm.

[0067] When assembling the draw die blank holding device provided by the present application, first assemble the upper segment component 30 and the punch 10 part. The blank holding insert 31 and the blank holding seat 32 are positioned and connected by screws and pins. First, ensure that the overall design is "convex" and is embedded inside the punch 10 to prevent it from detaching from the upper part of the die during the upward movement. Then, use 4 upper limit blocks corresponding to the first limit hanging platform 34 of the blank holding seat 32 to prevent the blank holding seat 32 from detaching from the lower end of the punch 10 during disassembly and assembly. Finally, use 4 upper guide plates 33 to be fixed on the blank holding seat 32 to ensure the precise guiding of the blank holding seat 32;

[0068] Then it is the lower segment component 40 and the lower bottom plate 20 part. First, embed the blank holding drive block 41 into the lower bottom plate 20. First, use the lower limit block 201 to prevent the blank holding drive block 41 from detaching from the lower bottom plate; then use 4 middle and lower limit blocks 202 corresponding to the second limit hanging platform 43 on the blank holding drive block 41 to prevent it from detaching from the upper part of the lower bottom plate 20; finally, use 4 lower guide plates 42 to be fixed on the blank holding drive block 41 to ensure the precise guiding of the blank holding drive block 41; then fix the punch 10 including the upper segment component 30 on the lower bottom plate 20 as a whole to achieve the overall assembly.

[0069] In the initial position state of the blank holding device, as shown in the figure, when the press upper ejector rod 200 descends, the upper segment component 30 and the lower segment component 40 freely descend under the action of gravity. When subjected to the lateral force during the sheet metal forming process, the movement of the blank holding device will be stuck, affecting the closing of the sheet metal, and in severe cases, causing crease appearance defects. Due to the design of the preloading elastic member 321, in the initial state, the preloading elastic member 321 is compressed. When the press ejector rod 200 descends, the upper segment component 30 is subjected to the downward elastic force and its own gravity of the preloading elastic member 321, and can descend smoothly to avoid movement jamming.

[0070] The drawing die support device provided in this application effectively achieves the limiting installation of the upper section component 30 and the punch 10, and the limiting installation of the lower section component 40 and the lower base plate 40 through the setting of the upper section component 30 and the lower section component 40. In the assembly process, the upper section component 30 and the lower section component 40 are first installed into the punch 30 and the lower base plate 40 respectively, and then the punch 10 containing the upper section component 30 is fixed on the lower base plate 20. Since the upper end of the upper section component 30 has a material support profile 31a, it ensures that the sheet metal is deformed smoothly. It can play a role in the deformation of the sheet metal during the closing process, so that the drawing die support device can be applied to the drawing support work of different inner surface parts and outer surface parts.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drawing die material support device, characterized in that, Includes punch, bottom plate, upper assembly, lower assembly and pressure ring; The punch has a first through hole running vertically through the top and bottom, and the upper end of the punch has a drawing punch surface; The lower base plate has a second through hole corresponding to the first through hole, and the punch is fixed above the lower base plate; The upper component is movably disposed in the first through hole and is restricted from falling off from the upper and lower ends of the punch. The upper end of the upper component has a material support surface. The lower section assembly is movably disposed in the second through hole and is restricted from falling off from the upper and lower ends of the lower base plate. The upper end of the lower section assembly contacts the lower end of the upper section assembly, and the lower end of the lower section assembly is used to contact the top rod extending from the lower end of the second through hole. The pressure ring is fitted onto the outside of the punch, and the upper end of the pressure ring has a pressure profile.

2. The drawing die support device according to claim 1, characterized in that, The upper component includes a material support insert, a material support base, and an upper guide plate; the material support insert is disposed at the upper end of the material support base, the material support profile is located at the top of the material support insert, the upper guide plate is connected to the side of the material support base, and the first through hole has an upper guide surface that contacts and guides the upper guide plate.

3. The drawing die support device according to claim 2, characterized in that, The upper part of the first through hole has an upper limit part, the lower end of which cooperates with the upper end face of the material support to limit the material support from disengaging from the upper end of the first through hole to the punch; the upper section assembly also includes a first limiting bracket, which is connected to one side of the material support, and the lower part of the first through hole has an upper middle limiting member that cooperates with the first limiting bracket to limit the material support from falling off from the lower end of the first through hole.

4. The drawing die support device according to claim 3, characterized in that, The upper end of the material support is provided with a plurality of pre-compression elastic elements along the circumferential direction. When the material support moves upward, the upper end of the pre-compression elastic element is used to contact the upper limit part and undergo elastic deformation.

5. The drawing die support device according to claim 3, characterized in that, The number of the first limiting brackets is even and at least 2, and the first limiting brackets are symmetrically arranged on both sides of the material support; the number of the upper guide plates is even and at least 4, and the upper guide plates are symmetrically arranged on both sides of the material support.

6. The drawing die support device according to claim 2, characterized in that, The lower section assembly includes a material support transmission block and a lower guide plate. The lower guide plate is connected to the side of the material support transmission block, and the second through hole has a lower guide surface that contacts and guides the lower guide plate.

7. The drawing die support device according to claim 6, characterized in that, The lower part of the second through hole has a lower limiting block, the upper end of which cooperates with the lower end of the material conveying block to limit the material conveying block from falling off from the lower end of the second through hole; the lower section assembly also includes a second limiting platform, which is connected to one side of the material conveying block, and the upper part of the second through hole has a middle and lower limiting block that cooperates with the second limiting platform to limit the material conveying block from detaching from the upper end of the second through hole from the lower base plate.

8. The drawing die support device according to claim 7, characterized in that, The number of the second limiting brackets is even and at least 2, and the second limiting brackets are symmetrically arranged on both sides of the material support transmission block; the number of the lower guide plates is even and at least 4, and the lower guide plates are symmetrically arranged on both sides of the material support transmission block.

9. The drawing die support device according to claim 7, characterized in that, The distance between the upper guide plate and the upper guide surface is set as L1, and the distance between the lower guide plate and the lower guide surface is set as L2. The absolute value of the difference between L1 and L2 is the gap S, where S satisfies: 1mm≤S≤3mm.

10. The drawing die support device according to claim 1, characterized in that, The material support surface is a smooth curved surface that convexes upwards, and the curvature trend of the material support surface and the material pressing surface is consistent; the edge of the material support surface has a chamfer, and the radius of the chamfer is not less than 5mm.

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