A curved die cutting integrated die structure

Abstract

The application discloses a curved surface punching and cutting integrated die structure and belongs to the technical field of punching die. The curved surface punching and cutting integrated die structure comprises oppositely arranged lower and upper molds, a profiling positioning boss capable of fitting the inner side curved surface of a workpiece is arranged on the side of the lower mold facing the upper mold, and a profiling positioning groove corresponding to the profiling positioning boss is arranged on the side of the upper mold facing the lower mold; wherein, a trimming edge is arranged on the side of the upper mold facing the lower mold and / or the groove surface of the profiling positioning groove. The curved surface punching and cutting integrated die structure can accurately match the curved surface profile on a product, and effectively improves the flatness of the product after edge punching.

Description

Technical Field

[0001] This invention belongs to the field of punching die technology, specifically relating to an integrated curved surface punching die structure. Background Technology

[0002] In the processing of curved products, the punching process is a key step to ensure the edge accuracy and appearance quality of the product. This is especially true for products with obvious curves and large arcs, such as automotive trim panels, where the punching difficulty is significantly increased.

[0003] Traditional punching dies typically consist of a single punch and die, and are mostly designed for flat products. When used directly for punching curved products, they are difficult to precisely match the contours of curved surfaces, resulting in uneven edges and numerous burrs during punching. Furthermore, secondary processing such as trimming and waste removal is required after die-cutting, which not only increases labor costs and reduces processing efficiency but also leads to poor product consistency.

[0004] Therefore, there is an urgent need for a die structure that can be used for integral punching of curved products. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a curved surface punching integrated die structure that can accurately match the curved surface contour of the product and effectively improve the flatness of the product edge after punching.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a curved surface punching integrated die structure, including a lower die and an upper die arranged opposite to each other, wherein the lower die is provided with a contour positioning boss on the side facing the upper die, which can fit into the inner curved surface of the workpiece, and the upper die is provided with a contour positioning groove corresponding to the contour positioning boss on the side facing the lower die. The upper mold has a cutting edge on the side facing the lower mold and / or on the groove surface of the contour positioning groove.

[0007] Optionally, the lower mold has a plurality of positioning protrusions on the side facing the upper mold, and the upper mold has a plurality of positioning grooves on the side facing the lower mold, which are respectively inserted and engaged with the positioning protrusions.

[0008] Optionally, the upper mold has a plurality of continuous and uninterrupted punching blades on one side facing the lower mold and / or on the groove surface of the contour positioning groove, and the upper mold has a plurality of waste discharge holes corresponding to the punching blades.

[0009] Optionally, the lower mold, the contour positioning boss, and the positioning boss are integrally formed.

[0010] Optionally, the upper mold, the cutting edge, and the punching edge are integrally formed.

[0011] Optionally, the thickness between the bottom side of the contour positioning groove and the other side of the upper mold is ≥10mm.

[0012] Optionally, the thickness of the lower mold is 20-40 mm.

[0013] Optionally, it also includes a mounting plate that can be detachably connected to the other side of the upper mold, and the mounting plate is provided with a plurality of waste discharge holes two that correspond to and pass through the first waste discharge hole.

[0014] Optionally, a cutting block is detachably connected to the upper mold, and the cutting block is provided with the contour positioning groove and / or cutting edge.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: By fitting the outer surface of the contour positioning boss with the inner surface of the workpiece, the position of the workpiece on the lower mold can be accurately positioned, ensuring that the workpiece does not loosen or shift on the contour positioning boss. Furthermore, by setting a cutting edge on the side of the upper mold facing the lower mold and / or on the groove surface of the contour positioning groove, the cutting edge can accurately match the curved contour of the product when the upper mold performs a punching operation on the product placed on the lower mold, improving the flatness of the punching edge of the curved product. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the curved surface punching integrated die structure in a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the upper mold in a preferred embodiment of the present invention; Figure 3 This is a preferred embodiment of the present invention. Figure 2 A magnified structural diagram at point B; Figure 4 This is a schematic diagram of the upper mold and the cutting block in a preferred embodiment of the present invention; Among them, 1. Lower mold; 11. Contouring positioning boss; 12. Positioning protrusion; 2. Upper mold; 201. Cutting block; 21. Contouring positioning groove; 22. Cutting blade; 23. Positioning groove; 24. Punching blade; 25. Waste discharge hole one; 3. Mounting plate; 31. Waste discharge hole two. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention and therefore only show the components relevant to the present invention.

[0019] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in this embodiment, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances. Example 1

[0020] like Figures 1-3 As shown, a curved surface punching integrated die structure includes a lower die 1 and an upper die 2 arranged opposite to each other. The upper die 2 and the lower die 1 can be assembled into a die-cutting machine in the conventional technology of this field by means of connection such as bolt fastening, pressure plate clamping, and die frame embedding, so that the lower die 1 and the upper die 2 correspond vertically. It should be noted that, in this embodiment, the lower die 1 is provided with a contour positioning boss 11 on the side facing the upper die 2, which can fit into the inner curved surface of the workpiece. The upper die 2 is provided with a contour positioning groove 21 corresponding to the contour positioning boss 11 on the side facing the lower die 1. The side of the upper die 2 facing the lower die 1 and / or the groove surface of the contour positioning groove 21 is provided with a cutting edge 22. That is, the cutting edge 22 is not on the same fixed horizontal plane. The cutting edge 22 can extend along the groove surface of the contour positioning groove 21 that matches the curved surface of the workpiece, thereby adapting to the curved surface of the workpiece to be punched.

[0021] Specifically, the workpiece to be punched can be placed on the contour positioning boss 11 manually or by a robot, causing the outer surface of the contour positioning boss 11 to engage with the inner surface of the workpiece. The contour positioning boss 11, which engages with the inner surface of the workpiece, not only accurately positions the workpiece on the lower die 1, ensuring the workpiece remains secure and does not shift, but also provides stable and effective support for the workpiece during punching. Then, the die-cutting machine drives the upper die 2 to move vertically toward the lower die 1 until the cutting edge 22 on the upper die 2 presses down and punches the workpiece placed on the contour positioning boss 11. It should be noted that any segment of the cutting edge 22 can simultaneously contact the workpiece surface, specifically as follows: Figure 3As shown. During the punching operation, the cutting edge 22 can directly and without offset punch the workpiece along a direction perpendicular to the workpiece surface. The integrated curved surface punching die structure in this embodiment can not only accurately fit the curved contour of the product, but also effectively improve the flatness of the product edge during punching.

[0022] In the above-described embodiment, the cutting edge 22 is continuously and uninterruptedly provided on the side of the upper mold 2 facing the lower mold 1 and / or on the groove surface of the contour positioning groove 21. The upper mold 2 and the cutting edge 22 are integrally formed to ensure the structural strength of the upper mold 2 and the cutting edge 22.

[0023] The above, such as Figure 1 As shown, the lower mold 1 has several positioning protrusions 12 on the side facing the upper mold 2, and the upper mold 2 has several positioning grooves 23 on the side facing the lower mold 1, which are respectively inserted and matched with the positioning protrusions 12, so as to realize the foolproof matching between the upper mold 2 and the lower mold 1, reduce human operation errors, and ensure the installation accuracy and punching stability of the curved surface punching integrated die structure.

[0024] The above, such as Figure 2 As shown, the upper mold 2 has several continuous and uninterrupted punching blades 24 on one side facing the lower mold 1 and / or on the groove surface of the contour positioning groove 21, and the upper mold 2 has several waste discharge holes 25 corresponding to the punching blades 24, so as to realize the synchronous operation of workpiece edge punching and punching, and further improve the processing efficiency of curved workpieces.

[0025] In this embodiment, the lower mold 1, the contour positioning boss 11, and the positioning boss 12 are integrally formed. Preferably, the lower mold 1, the contour positioning boss 11, the positioning boss 12, the upper mold 2, the cutting edge 22, and the punching edge 24 can be made by milling from a single piece of steel. At the same time, the cutting edge 22 and the punching edge 24 can also be improved in terms of hardness, high bending strength, wear resistance, and other properties through heat treatment processes such as quenching and tempering.

[0026] The one-piece molding structure has no welding points or splicing seams, which not only improves the precision of product punching, but also can withstand higher pressure and adapt to high-speed, high-intensity continuous die-cutting operations.

[0027] The thickness of the contour positioning groove 21 from the bottom to the other side of the upper mold 2 is ≥10mm, and the thickness of the lower mold 1 is 20-40mm, to ensure the strength of the upper mold 2 and the lower mold 1.

[0028] The above, such as Figure 1As shown, it also includes a mounting plate 3 that is detachably connected to the other side of the upper mold 2. The mounting plate 3 is provided with several waste discharge holes 31 that correspond to and pass through the first waste discharge hole 25. The mounting plate 3 can be adapted to upper molds 2 of various specifications and structures. The upper mold 2 can be detached and connected to the mounting plate 3 by bolt fastening, so as to facilitate the daily disassembly, maintenance and replacement of the upper mold 2. Example 2

[0029] Based on Embodiment 1, since the cutting edges 22 located at different positions experience varying degrees of wear during actual use, and when the wear difference of the cutting edges 22 at different positions is too large, it will directly affect the punching quality of the product. Therefore, in this embodiment, some structures on the upper mold 2 can adopt a split design.

[0030] Specifically, such as Figure 4 As shown, a cutting block 201 is detachably connected to the upper mold 2, and the cutting block 201 is provided with a contour positioning groove 21 and / or a cutting blade 22.

[0031] Furthermore, in this embodiment, the cutting block 201 is provided with a countersunk hole for passing through a fixing bolt, and one end of the fixing bolt can be threaded to the mounting plate 3.

[0032] Working principle: The workpiece to be punched can be placed on the contour positioning boss 11 manually or by robot, so that the outer surface of the contour positioning boss 11 fits into the inner surface of the workpiece, ensuring that the workpiece is not loose or shifted on the contour positioning boss 11. Then, the die-cutting machine can drive the upper mold 2 to move vertically toward the lower mold 1 until the cutting edge 22 on the upper mold 2 presses down and punches the workpiece placed on the contour positioning boss 11. Any section of the cutting edge 22 can simultaneously contact the surface of the workpiece, and the cutting edge 22 can punch the workpiece directly and without offset along a direction perpendicular to the surface of the workpiece.

[0033] Based on the preferred embodiments of the present invention described above, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A curved surface punching integrated die structure, characterized in that: The mold includes a lower mold (1) and an upper mold (2) arranged opposite to each other. The lower mold (1) has a contour positioning boss (11) on the side facing the upper mold (2) that can fit the inner curved surface of the workpiece. The upper mold (2) has a contour positioning groove (21) on the side facing the lower mold (1) that corresponds to the contour positioning boss (11). Among them, the upper mold (2) is provided with a cutting edge (22) on one side facing the lower mold (1) and / or on the groove surface of the contour positioning groove (21).

2. The integrated curved surface punching die structure according to claim 1, characterized in that: The lower mold (1) has a plurality of positioning protrusions (12) on the side facing the upper mold (2), and the upper mold (2) has a plurality of positioning grooves (23) on the side facing the lower mold (1), which are respectively inserted and engaged with the positioning protrusions (12).

3. The integrated curved surface punching die structure according to claim 1, characterized in that: The upper mold (2) is provided with a number of continuous and uninterrupted punching blades (24) on one side facing the lower mold (1) and / or on the groove surface of the contour positioning groove (21), and the upper mold (2) is provided with a number of waste discharge holes (25) corresponding to the punching blades (24).

4. The integrated curved surface punching die structure according to claim 2, characterized in that: The lower mold (1), the contour positioning boss (11), and the positioning boss (12) are integrally formed.

5. The integrated curved surface punching die structure according to claim 3, characterized in that: The upper mold (2), the cutting edge (22), and the punching edge (24) are integrally formed.

6. The integrated curved surface punching die structure according to claim 1, characterized in that: The thickness between the bottom side of the contour positioning groove (21) and the other side of the upper mold (2) is ≥10mm.

7. The integrated curved surface punching die structure according to claim 1, characterized in that: The thickness of the lower mold (1) is 20-40 mm.

8. The integrated die structure for curved surface punching according to claim 1, characterized in that: It also includes a mounting plate (3) that is detachably connected to the other side of the upper mold (2), and the mounting plate (3) is provided with a plurality of waste discharge holes (31) that correspond to and pass through the first waste discharge hole (25).

9. The integrated curved surface punching die structure according to claim 1, characterized in that: The upper mold (2) is detachably connected to a cutting block (201), and the cutting block (201) is provided with the contour positioning groove (21) and / or the cutting blade (22).

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