Punch pin for removing hole edge burrs
By setting an arched extension on the punch tip, the problem of burrs on the hole edge is solved, and the smooth surface effect after punching is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN GANGFENG MOLD PARTS CO LTD
- Filing Date
- 2025-04-11
- Publication Date
- 2026-05-08
AI Technical Summary
Existing punches are difficult to effectively remove burrs from the hole edges of materials such as polyimide film, polyamide materials, benzocyclobutene film, PET, high-transparency PS, hazy PS, black PS, PC, ABS, HIPS, and PE during the punching process.
Design a punch to remove burrs from the edge of a hole. The punch head has an arched extension section. The burr problem is improved by pre-stressing. The extension section then continues to punch the material to obtain a smooth surface.
The pre-stress of the arched structure significantly improves the burrs on the hole edge and enhances the smoothness of the sheared surface.
Smart Images
Figure CN224210085U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of punching, and more particularly to a punch for removing burrs from the edge of holes. Background Technology
[0002] like Figure 1-2 As shown, a punch is a tool used for punching holes. It can be used to punch holes in various materials, such as plastics and profiles.
[0003] Based on current customer feedback, when punching carrier tapes for materials such as polyimide film, polyamide materials, benzocyclobutene film, polyethylene terephthalate film (PET), polystyrene (PS high transparency, PS fog transparency, PS black), polycarbonate (PC), ABS, HIPS, and PE, burrs are found on the inner edge of the holes. To address this issue, several versions of the punch head have been iterated, such as flat head D, V-shaped head E, and beveled head F. However, without exception, the punched holes all have burrs. Utility Model Content
[0004] To address the aforementioned problems, this utility model provides a punch for removing burrs from the edge of holes, aiming to solve the problem of burrs on the edge of holes.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a punch for removing burrs from the edge of holes, comprising a needle shank and a needle head formed on the end of the needle shank, wherein the needle head forms a punch in a polymer material or a plastic film material, characterized in that the needle head is provided with an arched extension portion, the extension portion being surrounded by the edge of the needle head.
[0006] The beneficial effects of this utility model are:
[0007] The arched structure used in this invention can improve the burr problem during punching. This structure generates pre-stress by first contacting the material, and then the extended part continues to punch the material, thereby obtaining a shear surface with improved smoothness.
[0008] Furthermore, the extension is in the shape of a boss.
[0009] Furthermore, the edge of the extension coincides with the edge of the needle.
[0010] Furthermore, there is a gap between the edge of the extension and the edge of the needle.
[0011] Furthermore, the tip of the extension coincides with the central axis of the needle handle.
[0012] Furthermore, the tip of the extension is offset from the central axis of the needle handle.
[0013] Furthermore, the sides of the boss are concave.
[0014] Furthermore, the extension is cylindrical in shape.
[0015] Furthermore, the extension is composed of multiple flat bodies with circular outlines stacked together, and the diameter of the flat bodies increases or decreases sequentially along a single direction.
[0016] Furthermore, the needle handle can be one of the following: round needle, flat needle, or oval needle. Attached Figure Description
[0017] Figure 1 It is a 3D diagram of existing technology.
[0018] Figure 2 yes Figure 1 Enlarged diagram of point A.
[0019] Figure 3 The image shows the effect of punching with burrs as observed by the equipment when punching using an existing needle structure.
[0020] Figure 4 This is a diagram showing the effect of using equipment to observe the punched holes made by the needle of this utility model.
[0021] Figure 5 These are perspective views of six embodiments.
[0022] Figure 6 yes Figure 5 Side view.
[0023] Figure 7 It is a three-dimensional diagram of a needle with a flat handle.
[0024] Figure 8 yes Figure 7 Enlarged diagram of point A.
[0025] Figure 9 yes Figure 7 Enlarged diagram of point B. Detailed Implementation
[0026] Please see Figure 5-9 As shown, a punch for removing burrs from the edge of a hole includes a shank 1 and a needle 2 formed on the end of the shank 1. The needle 2 forms a hole in a polymer material or a plastic film material. The needle 2 is characterized by having an arched extension 21 surrounded by the edge of the needle 2.
[0027] The beneficial effects of this utility model are:
[0028] The arched structure used in this invention can improve the burr problem during punching. This first contact with the material generates pre-stress, and the extension 21 then continues to punch the material, thereby obtaining a shear surface with improved smoothness.
[0029] from Figure 3 As shown in the image, the hole punched by a traditional punch is magnified from the device, and the irregular black shadows inside the hole are burrs.
[0030] The holes punched using this invention can be referenced. Figure 4 As shown, there are no obvious irregular shadows around the holes, therefore, it can be determined that the burr problem has been improved.
[0031] Furthermore, the extension 21 is in the shape of a boss 21a.
[0032] Furthermore, the edge of the extension 21 coincides with the edge of the needle 2.
[0033] Furthermore, there is a gap between the edge of the extension 21 and the edge of the needle 2.
[0034] Furthermore, the top end of the extension 21 coincides with the central axis of the needle handle 1.
[0035] Furthermore, the top end of the extension 21 is offset from the central axis of the needle handle 1.
[0036] Furthermore, the side of the boss 21a is concave 21a-1.
[0037] Furthermore, the extension 21 is cylindrical in shape.
[0038] Furthermore, the extension 21 is formed by stacking multiple flat bodies 21b with circular outlines, and the diameter of the flat bodies 21b increases or decreases sequentially along a single direction.
[0039] Furthermore, the needle handle 1 is one of the following: round needle, flat needle, or oval needle.
[0040] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.
Claims
1. A punch for removing burrs from hole edges, comprising a shank and a needle tip formed on the end of the shank, said needle tip forming a hole in a polymer material or plastic film material, characterized in that, The needle tip has an arched extension that is surrounded by the edge of the needle tip.
2. The punch for removing burrs from hole edges according to claim 1, characterized in that, The extension is in the shape of a boss.
3. A punch for removing burrs from hole edges according to claim 2, characterized in that, The sides of the boss are concave.
4. A punch for removing burrs from hole edges according to claim 1, characterized in that, The extension is composed of multiple flat bodies with circular outlines stacked together, and the diameter of the flat bodies increases or decreases sequentially along a single direction.
5. A punch for removing burrs from hole edges according to claim 1, characterized in that, Furthermore, the extension is cylindrical in shape.
6. A punch for removing burrs from hole edges according to any one of claims 1-5, characterized in that, The edge of the extension coincides with the edge of the needle.
7. A punch for removing burrs from hole edges according to any one of claims 1-5, characterized in that, There is a gap between the edge of the extension and the edge of the needle.
8. A punch for removing burrs from hole edges according to any one of claims 1-5, characterized in that, The tip of the extension coincides with the central axis of the needle handle.
9. A punch for removing burrs from hole edges according to any one of claims 1-5, characterized in that, The tip of the extension is offset from the central axis of the needle shank.
10. A punch for removing burrs from hole edges according to any one of claims 1-5, characterized in that, The needle handle can be one of the following: round needle, flat needle, or oval needle.