Sleeve punching piece
Through the electric spark wire processing technology, the problem of the existing punching part manufacturing methods requiring special equipment and time is solved, and the rapid and efficient punching part manufacturing is achieved, and complex geometric structures can be achieved.
Patent Information
- Application Number
- CN202510163451.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2019-06-06
- Filing Date
- 2020-06-05
- Publication Date
- 2025-05-06
AI Technical Summary
Existing methods for manufacturing punching parts require specialized grinding equipment and long time, and it is difficult to achieve certain complex geometric configurations.
Punching parts are manufactured using electric spark wire machining (WEDM) technology, by forming blanks, retaining blanks with engagers, machining grooves and side clearance surfaces on the working part, milling to final shape and size, and forming tapered tips at the ends.
Eliminates the need for specialized equipment, improves manufacturing time, quality, consistency and efficiency, and enables rapid manufacturing of punched parts based on CAD models.
Smart Images
Figure CN119927344A_ABST
Abstract
Description
[0001] Divisional Application Statement
[0002] This application is a divisional application of the Chinese invention patent application filed on June 5, 2020, with the invention name “Sleeve Punching Part” and application number 202010507779.1. Technical Field
[0003] The present disclosure generally relates to punching members and methods of manufacturing punching members. More particularly, the present invention relates to punching members having a specific configuration and methods of manufacturing such sleeve punching members using electrical discharge machining. Background Art
[0004] A punch is a tool used to create a hole in a material (e.g., a workpiece). Typically, a punch operates in a "cold working" manner, where the hole is punched without the use of additional heat (such as with hot extrusion or other "hot working" operations). Forcing the punch into the workpiece or "impacting" the punch into the workpiece reforms the material into the shape of the punch.
[0005] Punching parts are manufactured in a variety of ways, but are usually formed by grinding a punch blank into a desired geometric configuration. However, grinding requires specialized grinding equipment, extended time to manufacture the punch, and additional quality control procedures to ensure that the final punch product meets the required specifications. In addition, it may not be possible to grind the punch blank into certain desired geometric configurations. Summary of the invention
[0006] The present invention broadly includes a method for manufacturing a punching part such as a sleeve punching part using wire electrical discharge machining (WEDM). In an embodiment, the process includes the following steps: (1) forming a blank; (2) holding the blank with a connector; (3) using WEDM technology to manufacture a groove into a working portion of the blank; (4) using WEDM technology to manufacture a side clearance surface of the working portion; (5) milling the working portion to a final shape and size; and (6) forming a tapered tip on the end of the working portion. The present invention allows the punching part to be manufactured based on a computer-aided design (CAD) model by "burning" the punching part geometry with wire, thereby eliminating the need for specialized equipment (such as grinding equipment) and improving manufacturing time, quality, consistency and efficiency.
[0007] The present invention also broadly includes a method of manufacturing a punching part, which includes forming a blank, machining the geometric structure of the blank using an Electrical Discharge Machining (EDM) machine, milling the desired geometric structure of the blank on a portion to obtain the final geometric size and configuration, and machining a tapered tip on the end of the portion to form a punching part.
[0008] Embodiments of the present invention broadly include a punch having a desired geometry of a blank to achieve a final geometry and configuration that provides an angled configuration to a portion of the punch. The final geometry and configuration may be formed on a land area of the punch.
[0009] In addition, another embodiment of the present invention broadly includes a method of manufacturing a punching member, the method comprising: forming a blank; machining the blank geometry using an electric discharge machine; milling the desired geometry of the blank to obtain the final geometry and to make a portion of the punching member have a certain angle configuration; machining a tapered tip on the end of the portion to form the punching member. The final geometry can be formed on a die face of the punching member. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] For the purpose of facilitating understanding of the subject matter to be protected, embodiments thereof are shown in the accompanying drawings, and by inspection of these drawings, when considered in conjunction with the following description, the subject matter to be protected and its structure, operation and many advantages should be readily understood and appreciated.
[0011] Figure 1 is a side perspective view of a punching element blank according to an embodiment of the present invention.
[0012] Figure 2 is a side perspective view of an EDM machine tool manufacturing a punching part blank held by an adapter according to an embodiment of the present invention.
[0013] Figure 3 is a side perspective view of an EDM machine making a slot into a punching part blank according to an embodiment of the present invention.
[0014] Figure 4 is a side perspective view of a relief surface of an EDM machine tool manufacturing a working portion according to an embodiment of the present invention.
[0015] Figure 5 is a side perspective view of a milling machine according to an embodiment of the present invention milling a working part to a final hexagonal size.
[0016] Figure 6is a side perspective view of a completed punching member having a tapered tip machined at the end of the working portion according to an embodiment of the present invention.
[0017] Figure 7 is a flow chart outlining a method of manufacturing a punching member according to an embodiment of the present invention.
[0018] Figure 8 is a side perspective view of a completed punching part with a die surface having a certain angle according to an embodiment of the present invention.
[0019] Fig. 9 4 is a cross-sectional view of a completed punching part according to an embodiment of the present invention, in which the die surface has a certain angle.
[0020] Fig.10 is a flow chart outlining a method of manufacturing a punching member according to an embodiment of the present invention. DETAILED DESCRIPTION
[0021] Under the understanding that the present disclosure is to be considered as an example of the principles of the present invention and is not intended to limit the broad aspects of the present invention to the illustrated embodiments, although the present invention has many different forms of embodiment, the preferred embodiments of the present invention are shown in the drawings and will be described in detail herein. As used herein, the term "present invention" is not intended to limit the scope of the claimed invention, but is only for illustrative purposes as a term used to discuss exemplary embodiments of the present invention.
[0022] The present invention broadly includes a punching part, such as a sleeve punching part, and a method of manufacturing a punching part using WEDM, wherein a portion of the punching part has a certain angle. In an embodiment, a blank is formed; the blank is held by an adapter; a groove is machined in a working part using WEDM; a side clearance surface of the working part is manufactured using WEDM; the working part is milled to a final size; a tapered tip is formed on the end of the working part; and a die face around the tapered tip substantially adjacent to the end of the working part is formed at a certain angle. The above process allows punching parts to be manufactured according to a CAD model and more quickly, thereby eliminating the need for specialized equipment and improving manufacturing time, efficiency, quality and consistency.
[0023] Reference Figure 1 In an embodiment, the blank 100 includes a first end 100a and an opposite second end 100b. The blank 100 may include a base 105 serving as the structural backbone of the blank 100 and a working portion 110 for performing a punching operation when completed and in use. The blank 100 may be of any material, but in an embodiment, the blank 100 is made of CPM (Crucible Particle Metallurgy) T15 steel. As described below with reference to Figure 7 As discussed, the manufacturing process includes forming a blank (such as Figure 1 The blank 100 shown in FIG.
[0024] Reference Figure 2 , shows a side perspective view of a coupler 115 holding a blank 100 and an EDM machine 120 manufacturing the blank 100 held by the coupler 115 according to an embodiment of the present invention. As shown, the EDM machine 120 may include a wire 125 that performs a machining / manufacturing operation of the EDM machine 120. The wire 125 has a diameter of approximately 0.010" (inch), but the present invention is not limited thereto.
[0025] Reference Figure 3 , shows a side perspective view of an EDM machine 120 making a slot 130 into a blank 100 according to an embodiment. As shown, the wire 125 can be positioned at an angle relative to the axis of the blank 100. For example, but not limited to, the wire 125 can be angled between 1.25 degrees and 2.00 degrees to avoid cutting the base 105 during the machining operation. By angling the wire 125, the punching piece can be easily pulled out of the sleeve during the cold forming process when completed.
[0026] Reference Figure 4 , shows a side perspective view of an EDM machine 120 manufacturing a relief surface of a working portion 110 according to an embodiment. For example, the EDM machine 120 can use WEDM technology to manufacture a transition portion 135 leading to a hexagonal portion 140. The hexagonal portion 140 can extend from the end of the transition portion 135 to the hexagonal end 145. Figure 5 As shown, the working portion 110, and in particular, in some embodiments, the hexagonal portion 140, can be milled by a milling machine 150 to a final hexagonal size of the working portion 110 / hexagonal portion 140. Figure 6 As shown, a tapered tip 155 may then be machined into the hexagonal end 145 of the blank 100 to complete the machining portion of the process.
[0027] Figure 7 700 is a method for manufacturing a punching member according to an embodiment of the present invention. As shown, the method 700 starts and proceeds to step 705. In step 705, as shown in FIG. Figure 1 Then, the method 700 proceeds to step 710, in which the blank 100 is held by the adapter 115, such as Figure 2 This is followed by step 715, in which a groove 130 may be formed on the working portion 110 in the blank 100, such as Figure 3Then, the method 700 proceeds to step 720, where the side relief surface of the working portion 110 is machined. In this step, the transition portion 135 and the hexagonal portion 140 may be machined into the blank using EDM technology, such as Figure 4 Then, the method may proceed to step 725, where the hexagonal portion 140 is milled to its Figure 5 The final dimensions are shown and the process then proceeds to step 730 where the tapered tip 155 is machined into the hexagonal end 145 .
[0028] Then, the method 700 may proceed to step 735, where the punching member is stress relieved. For example, the punching member may be stress relieved at 1025°F for 2 hours. Then, the method 700 may proceed to step 740, where the punching member is surface coated. For example, the punching member may be coated with aluminum chromium nitride or titanium nitride.
[0029] Although Figure 7 The above steps in and elsewhere are described in a specific time order in the specification, but unless explicitly stated in the claims, such an order is not necessarily required to implement the present invention. In addition, certain steps may be omitted from method 700, and unless explicitly stated in the appended claims, these steps are optional.
[0030] Reference Figure 8 , shows a side perspective view of a completed punching part with a die face having a certain angle according to an embodiment of the present invention. As described above, the blank 100 includes a first end 100a, an opposite second end 100b, a base 105 serving as the structural backbone of the blank 100, and a working portion 110 to perform a punching operation when completed and used. The EDM machine can be used to manufacture a slot 130, a clearance surface of the working portion 110 (such as a transition portion 135 leading to a hexagonal portion 140) in the blank 100 using WEDM technology. The hexagonal portion 140 can extend from the end of the transition portion 135 to the hexagonal end 145, and then the tapered tip 155 can be machined into the hexagonal end 145 of the blank 100.
[0031] In addition, the hexagonal portion 145 may have a die / molding surface 160. The die surface 160 is machined around the working portion 110 between the hexagonal portion 140 and the tapered tip 155. The die surface 160 may have a tapered angle inwardly relative to the hexagonal portion 140 of the punch. Fig. 9As shown, the taper angle of the die surface 160 can be about 0.5° to about 3° around the hexagonal portion 145. More specifically, the taper angle of the die surface 160 can be about 1.2° to about 2.2°. EDM machines can be used to manufacture the die surface 160 with a taper angle. By angling the die surface 160, the punching piece can be more easily pulled out of the workpiece during the cold forming process when completed.
[0032] Fig.10 A method 1000 for manufacturing a punching part according to an embodiment is shown. As shown, the method 1000 starts and proceeds to step 1005, in which a blank is formed, such as Figure 1 Then, the method 1000 proceeds to step 1010, in which the blank 100 is held by the adapter 115, such as Figure 2 This is followed by step 1015, in which a groove 130 may be formed on the working portion 110 in the blank 100, such as Figure 3 Then, the method 1000 proceeds to step 1020, where the side relief surface of the working portion 110 is machined. In this step, the transition portion 135 and the hexagonal portion 140 can be machined into the blank using EDM technology, such as Figure 4 Then, the method 1000 may proceed to step 1025, where the hexagonal portion 140 is milled to its Figure 5 The final dimensions shown are then presented to step 1030, where a tapered tip 155 is machined into the hexagonal end 145. This is followed by step 1035, where a die face having an inward taper angle is machined around the blank 100 between the hexagonal portion 140 and the tapered tip 155. The taper angle of the die face 160 can be about 0.5° to about 3° around the hexagonal portion 145. More specifically, the taper angle of the die face 160 can be about 1.2° to about 2.2°.
[0033] Then, the method 1000 may proceed to step 1040, where the punching member is stress relieved. For example, the punching member may be stress relieved at 1025°F for 2 hours. Then, the method 1000 may proceed to step 1045, where the punching member is surface coated. For example, the punching member may be coated with aluminum chromium nitride or titanium nitride.
[0034] Again, although Fig.10 The above steps in the method 1000 and the steps in other places of the specification are described in a specific time order, but unless explicitly stated in the appended claims, such an order is not necessarily required to implement the present invention. In addition, certain steps can be omitted from the method 1000, and unless explicitly stated in the appended claims, these steps are optional.
[0035] As used herein, the term "coupled" and its functional equivalents are not intended to be necessarily limited to a direct mechanical coupling of two or more components. Rather, the term "coupled" and its functional equivalents are intended to refer to any direct or indirect mechanical, electrical, or chemical connection between two or more objects, features, workpieces, and / or environmental materials. In some examples, "coupled" also means that one object is integral with another object.
[0036] What has been described in the foregoing description and accompanying drawings is provided by way of illustration only and not as a limitation. Although specific embodiments have been shown and described, it will be apparent to those skilled in the art that changes and modifications may be made without departing from the broader aspects of the inventor's contribution. The actual scope of the protection sought is intended to be defined in the claims when viewed in their proper perspective based on the prior art.
Claims
1. A punching part for performing a punching operation in a cold forming process, comprising: a base portion adapted to be a structural component of the punching member, wherein the base portion has a first end; a working portion extending from the base to the first end, the working portion having a hexagonal portion; a tapered tip machined at said first end; and A mating surface is formed at a position adjacent to the hexagonal portion and between the hexagonal portion and the tapered tip, wherein the mating surface has a mating surface length of approximately 0.013 inches to 0.017 inches and an inward taper angle of approximately 0.5° to 3° relative to the hexagonal portion, and when the mating surface and at least a portion of the hexagonal portion are inserted into a workpiece to perform the punching operation, the inward taper angle of the mating surface facilitates removal of the punching member from the workpiece when the punching operation is completed.
2. The punching element according to claim 1, characterized in that: The die surface is formed by using an electric discharge machining (EDM) machine tool.
3. The punching element according to claim 3, characterized in that: The inward taper angle is approximately 1.2° to 2.2°.
4. The punching element according to claim 1, characterized in that: The punching member includes a crucible particle metallurgy (CPM) T15 steel material.
5. A method for manufacturing a punching piece for performing a punching operation in a cold forming process, comprising: forming a plurality of slots in a blank having a base portion and an end portion, the base portion being adapted to serve as a structural component of the punching member, the plurality of slots extending to the end portion; machining the plurality of grooves to form a hexagonal portion adjacent the end, wherein after forming the hexagonal portion, corresponding groove portions of the plurality of grooves remain between the end and the hexagonal portion; and The groove portion is machined to form a mating surface between the hexagonal portion and the end portion, wherein the mating surface has an inward taper angle of approximately 0.5° to 3° relative to the hexagonal portion, the mating surface and at least a portion of the hexagonal portion are suitable for being inserted into a workpiece to perform the punching operation, and the inward taper angle of the mating surface is suitable for assisting in removing the hexagonal portion from the workpiece when the punching operation is completed.
6. The method according to claim 5, characterized in that The inward taper angle is approximately 1.2° to 2.2°.
7. The method according to claim 5, characterized in that The step of forming the plurality of grooves includes using electrical discharge machining (EDM) with a wire having a diameter of approximately 0.010 inches.
8. The method according to claim 5, characterized in that The blank includes Crucible Particle Metallurgy (CPM) T15 steel material.
9. The method according to claim 5, characterized in that The step of machining the groove portion to form the die surface includes machining the die surface using electrical discharge machining (EDM).
10. A method of manufacturing a punching piece for performing a punching operation in a cold forming process, the method comprising: machining a plurality of grooves in a blank having a base and an end portion using an electric discharge machining (EDM) machine, wherein the base portion is suitable for being a structural component of the punching member, wherein the plurality of grooves extend to the end portion; machining the plurality of grooves to form a hexagonal portion, wherein after forming the hexagonal portion, corresponding groove portions of the plurality of grooves remain between the end portion and the hexagonal portion; milling the hexagonal portion to obtain a final hexagonal portion size; machining the end portion; and The groove portion is machined to form a mating surface between the end portion and the hexagonal portion, wherein the mating surface has an inward taper angle of approximately 0.5° to 3° relative to the hexagonal portion, the mating surface and at least a portion of the hexagonal portion are suitable for being inserted into a workpiece to perform the punching operation, and the inward taper angle of the mating surface is suitable for facilitating removal of the hexagonal portion from the workpiece when the punching operation is completed.
11. The method according to claim 10, characterized in that The inward taper angle is approximately 1.2° to 2.2°.
12. The method according to claim 10, characterized in that The step of machining the groove portion to form the land includes forming a land having a land length of 0.013 inches to 0.017 inches.
13. The method according to claim 10, characterized in that The step of machining the groove portion to form the mating surface includes using the electric discharge machining machine.
14. The method according to claim 10, characterized in that The method also includes stress relieving the punching member.
15. The method according to claim 14, characterized in that The step of stress relieving the punching member includes heating the punching member to about 1025° F. for about 2 hours.
16. The method according to claim 10, characterized in that The method further includes surface coating the punching member.
17. The method according to claim 16, characterized in that The step of surface coating the punching member includes coating the punching member with one of aluminum chromium nitride and titanium nitride.