Stamping die device
By using a double-punch structure with rounded corners and a reasonable clearance setting, the problems of poor workpiece forming dimensions and excessively large burr size in existing stamping dies have been solved, achieving efficient and precise stamping processing and improving product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-17
AI Technical Summary
The right-angle design of the punch and cutting edge in existing stamping dies leads to poor forming size of the through hole in the workpiece, and the unreasonable setting of the material cavity clearance results in large burr size and low product quality.
The double punch structure with rounded corners, combined with reasonable cutting edge clearance and material cavity design, includes rounded corner treatment on the end face edges of the first and second punches. The first cutting edge clearance is 5% of the workpiece thickness, and the second cutting edge clearance is 0.05mm. Caldie mold steel and DUPLEX-VARIANTIC coating are used. The inner diameters of the first and second material cavities gradually increase.
It effectively avoids workpiece chipping, provides stamped products with a large bright band, improves processing efficiency and product consistency, and ensures processing accuracy and quality.
Smart Images
Figure CN223997038U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a metal processing mold, and more particularly to a stamping mold device. Background Technology
[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.
[0003] A workpiece needs to be stamped to form a through hole of a predetermined size. The workpiece thickness is 6mm. In existing technology, a punch is typically used to directly stamp the workpiece, with a cutting edge at the bottom. The punch end face in the stamping die is usually set at a right angle. Right angles lack a buffering effect, making it easy for chipping to occur between the punch and the cutting edge, resulting in poor dimensional forming of the through hole in the final workpiece. Furthermore, the gap between the punch and the cutting edge's material receiving cavity is often improperly designed, leading to a small bright band on the cross-section of the stamped through hole, excessively large burrs exceeding the fine blanking dimensions, resulting in dimensional defects, or the cross-section of the stamped through hole not being a fully bright band, resulting in low product quality.
[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content
[0005] The purpose of this invention is to provide a stamping die device that can produce stamped products with a large bright band by setting a double punch with rounded corners.
[0006] To achieve the above objectives, this utility model discloses a stamping die device for stamping workpieces, the stamping die device comprising:
[0007] A stripper plate, the bottom surface of which is used to abut against the top surface of the workpiece, the stripper plate having a first mounting hole and a second mounting hole;
[0008] The first cutting edge has a top surface for abutting the bottom surface of the workpiece, and the first cutting edge has a first material receiving cavity that matches the position of the first mounting hole;
[0009] The second cutting edge has a top surface that abuts against the bottom surface of the workpiece, and the second cutting edge has a second material receiving cavity that matches the position of the second mounting hole;
[0010] A first punch is used to move up and down in the first mounting hole and the first material cavity, wherein the end face of the first punch is disposed facing the first material cavity;
[0011] The second punch is used to move up and down in the second mounting hole and the second material cavity, wherein the end face of the second punch is disposed facing the second material cavity;
[0012] The first punch has rounded corners at the end face edges, and the second punch has a radial first cutting edge gap between the outer wall of the first punch and the inner wall of the first material cavity at the end face of the first cutting edge. The second punch has a radial second cutting edge gap between the outer wall of the second punch and the inner wall of the second material cavity at the end face of the second cutting edge. The first cutting edge gap is larger than the second cutting edge gap.
[0013] As a further description of the above technical solution, the fillet radius of the rounded corners at the end face edges of the first punch and the end face edges of the second punch is 0.5mm.
[0014] As a further description of the above technical solution, the size of the first cutting edge gap is set to 5% of the workpiece thickness.
[0015] As a further description of the above technical solution, the size of the second blade gap is set to 0.05mm.
[0016] As a further description of the above technical solution, the materials of the first cutting edge and the second cutting edge are set to Caldie mold steel.
[0017] As a further description of the above technical solution, the coatings on the first cutting edge and the second cutting edge are set as DUPLEX-VARIANTIC coatings.
[0018] As a further description of the above technical solution, the coatings of the first cutting edge and the second cutting edge are polished to a high gloss before and after.
[0019] As a further description of the above technical solution, the inner diameter of the first material cavity gradually increases from top to bottom; the inner diameter of the second material cavity gradually increases from top to bottom.
[0020] Based on the above technical solution, the beneficial effects of this utility model are as follows:
[0021] This invention relates to a stamping die device that utilizes double punches with rounded corners. Specifically, both the first punch used for initial pre-stamping and the second punch used for secondary fine stamping have rounded corners at their end faces. This provides a buffer during the stamping process, preventing chipping and dimensional defects, and resulting in stamped products with a large, bright finish. Furthermore, using double punches in the same die helps improve processing efficiency and maintain process consistency.
[0022] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a cross-sectional schematic diagram of the first punch of a stamping die device provided in the embodiments of this specification;
[0025] Figure 2 This is a cross-sectional schematic diagram of the second punch of a stamping die device provided in the embodiments of this specification;
[0026] Figure 3 This is a perspective view of a stamping die device provided in the embodiments of this specification;
[0027] Figure 4 This is a partially enlarged schematic diagram of a stamping die device provided in the embodiments of this specification;
[0028] In the picture:
[0029] 100. Workpiece;
[0030] 1. Stripping plate;
[0031] 2. First cutting edge; 21. First material receiving cavity;
[0032] 3. Second cutting edge; 31. Second material receiving cavity;
[0033] 4. First punch;
[0034] 5. Second punch;
[0035] 6. Chamfer. Detailed Implementation
[0036] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.
[0037] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.
[0038] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.
[0039] Please see Figure 1-4 This embodiment provides a stamping die apparatus for stamping a workpiece 100, wherein the stamping die apparatus includes:
[0040] Stripper plate 1, the bottom surface of stripper plate 1 is used to abut against the top surface of workpiece 100, stripper plate 1 has a first mounting hole and a second mounting hole;
[0041] The first cutting edge 2, the top surface of the first cutting edge 2 is used to abut the bottom surface of the workpiece 100, and the first cutting edge 2 has a first material receiving cavity 21 that matches the position of the first mounting hole;
[0042] The second cutting edge 3 has a top surface that abuts against the bottom surface of the workpiece 100, and the second cutting edge 3 has a second material receiving cavity 31 that matches the position of the second mounting hole.
[0043] The first punch 4 is used to move up and down in the first mounting hole and the first material receiving cavity 21, wherein the end face of the first punch 4 is set towards the first material receiving cavity 21;
[0044] The second punch 5 and the second punch 3 are used to move up and down in the second mounting hole and the second material cavity 31, wherein the end face of the second punch 5 is set towards the second material cavity 31.
[0045] The end face edges of the first punch 4 and the second punch 5 are rounded. The outer wall of the first punch 4 and the inner wall of the first material cavity 21 have a radial first cutting edge gap at the end face of the first cutting edge 2. The outer wall of the second punch 5 and the inner wall of the second material cavity 31 have a radial second cutting edge gap at the end face of the second cutting edge 3. The first cutting edge gap is larger than the second cutting edge gap.
[0046] With the above structure, during use, the operator only needs to place the workpiece 100 at the position of the first cutting edge 2 below the stripper plate 1, set the area to be processed of the workpiece 100 between the first punch 4 and the first material receiving cavity 21, and start the first punch 4 to perform the first pre-punch on the area to be processed of the workpiece 100. Specifically, after the first punch 4 impacts the area to be processed of the workpiece 100, it enters the first material receiving cavity 21 of the first cutting edge 2. During the above process, the area to be processed of the workpiece 100 is cut to a size close to that of the first punch 4 after being impacted, and part of the metal material of the workpiece 100 falls into the first material receiving cavity 21 and is discharged. At this time, the workpiece 100 has completed the pre-punch.
[0047] Then, the workpiece 100 is repositioned at the position of the first cutting edge 2 below the stripper plate 1. The area to be processed on the workpiece 100 is positioned between the second punch 5 and the first material receiving cavity 21. The second punch 5 is then activated to perform a second fine blanking on the area to be processed on the workpiece 100. Specifically, after impacting the area to be processed on the workpiece 100, the second punch 5 enters the second material receiving cavity 31 of the second cutting edge 3. During this process, the area to be processed on the workpiece 100 is cut to a size close to that of the second punch 5 after impact, and some of the metal material from the workpiece 100 falls into the second material receiving cavity 31 and is discharged. At this point, the workpiece 100 has completed the fine blanking.
[0048] In the aforementioned usage, by setting up a double punch with rounded corners, specifically, both the first punch 4 and the second punch 5 used for the initial pre-stamping and the second punch 5 used for the secondary fine stamping have rounded corners at their end faces. This provides a certain buffer during the stamping process, preventing chipping and dimensional defects, and producing stamped products with a large bright band. Furthermore, setting up double punches on the same mold helps improve processing efficiency and maintain processing consistency.
[0049] Furthermore, the fillet radius of the rounded corners at the end face edges of the first punch 2 and the second punch 3 is 0.5mm. In the prior art, punches are generally set at right angles. In this embodiment, the 0.5mm chamfered punch can effectively avoid the occurrence of 100° corner chipping of the workpiece caused by right-angle punches.
[0050] Furthermore, the first cutting edge gap is set to 5% of the workpiece thickness. Simultaneously, the second cutting edge gap is set to 0.05mm. That is, in this embodiment, the initial pre-punch setting is smaller than the conventional 8% first cutting edge gap. Compensating for this, with the assistance of the chamfering punch, the effect of increasing the bright band on the cross-section can be effectively achieved. In the fine blanking, this embodiment directly sets a specific preset value (0.05mm), which, compared to the 3% second cutting edge gap for a workpiece thickness of 100mm in the prior art, provides higher processing accuracy and can achieve a full bright band effect.
[0051] Furthermore, the first and second cutting edges are made of Caldie die steel. Caldie die steel has unique properties including excellent weldability, castability, hardenability, machinability, and grindability, making it suitable for the stamping process in this embodiment.
[0052] Furthermore, the coatings on the first and second cutting edges are set as DUPLEX-VARIANTIC coatings, which are made using a dual-layer (Duplex) coating system prepared with PVD technology. The coatings are then polished at both ends to achieve a high gloss finish, resulting in better stamping performance and greater environmental friendliness.
[0053] Furthermore, the inner diameter of the first material receiving cavity 21 gradually increases from top to bottom; the inner diameter of the second material receiving cavity 31 also gradually increases from top to bottom. In other words, except for the end face cutting edge of the first material receiving cavity 21 and the second material receiving cavity 31 maintaining the corresponding inner diameter, the size below them expands, thus facilitating the discharge of waste material after stamping.
[0054] Specifically, such as Figure 4 As shown in the enlarged view, chamfer 6 is the effect of the 0.5mm chamfer treatment performed at the first punch 4 in this embodiment.
[0055] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.
[0056] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.
[0057] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.
Claims
1. A press die apparatus for press working a workpiece, wherein, The workpiece has a top surface and a bottom surface arranged oppositely, characterized in that the stamping die device comprises: a stripper plate, a bottom surface of the stripper plate being used to abut against the top surface of the workpiece, the stripper plate having a first mounting hole and a second mounting hole; a first knife edge, a top surface of the first knife edge being used to abut against the bottom surface of the workpiece, the first knife edge having a first material receiving cavity matched with the position of the first mounting hole; a second knife edge, a top surface of the second knife edge being used to abut against the bottom surface of the workpiece, the second knife edge having a second material receiving cavity matched with the position of the second mounting hole; a first punch, the first punch being used to move up and down in the first mounting hole and the first material receiving cavity, wherein an end surface of the first punch is arranged towards the first material receiving cavity; a second punch, the second punch being used to move up and down in the second mounting hole and the second material receiving cavity, wherein an end surface of the second punch is arranged towards the second material receiving cavity; wherein the end surface edges of the first punch and the second punch are chamfered, the first knife edge gap in the radial direction is formed between the outer wall of the first punch and the inner wall of the first material receiving cavity at the end surface of the first knife edge, the second knife edge gap in the radial direction is formed between the outer wall of the second punch and the inner wall of the second material receiving cavity at the end surface of the second knife edge, and the first knife edge gap is larger than the second knife edge gap.
2. The stamping die apparatus of claim 1, wherein: The chamfer radius of the chamfered end surface edges of the first punch and the second punch is 0.5 mm.
3. The stamping die apparatus of claim 1, wherein: The size of the first knife edge gap is set to 5% of the thickness of the workpiece.
4. The stamping die apparatus of claim 1, wherein: The size of the second knife edge gap is set to 0.05 mm.
5. The stamping die apparatus of claim 4, wherein: The material of the first knife edge and the second knife edge is set to Caldie die steel.
6. The stamping die apparatus of claim 5, wherein: The coating of the first knife edge and the second knife edge is set to DUPLEX-VARIANTIC coating.
7. The stamping die apparatus of claim 1, wherein: The coating of the first knife edge and the second knife edge is polished and highlighted before and after coating.
8. The stamping die apparatus of claim 1, wherein: The inner diameter of the first material receiving cavity gradually increases from top to bottom; the inner diameter of the second material receiving cavity gradually increases from top to bottom.
9. The stamping die apparatus of claim 1, wherein: The first knife edge and the second knife edge are arranged on the same bottom plate.