Trimming die for machining punch through cutting edge waste

Abstract

The utility model provides a trimming die for machining a punch through cutting edge waste. The trimming die comprises a trimming die blank and a punch blank which are integrally arranged. The punch blank body is arranged in the center of the trimming die blank body, and a first avoiding cutter groove is formed in the peripheral surface of the punch blank body; a second avoiding cutter groove is formed in the peripheral surface, corresponding to the punch blank body, of the trimming die blank body; and the first cutter avoiding groove and the second cutter avoiding groove are encircled to form a cutter feeding gap for a numerical control milling cutter to pass through. According to the trimming die for machining the punch through the cutting edge waste, the punch and the trimming die can be manufactured on the same blanking piece through numerical control milling, the manufacturing cost of the trimming die is reduced, and the manufacturing efficiency of the trimming die and the punch is improved.

Description

Technical Field

[0001] This utility model relates to the field of edge trimming dies, specifically, to an edge trimming die for processing punches using waste material from the cutting edge. Background Technology

[0002] During stamping and forging processes, flash often remains around the blank, requiring removal using a trimming die. Existing trimming dies typically involve separately machining the upper die and trimming die, resulting in low material utilization. To improve material utilization, a solution has emerged where the trimming die punch and trimming die are machined separately from the same sheet metal. However, since the trimming die's cutting edge profile is larger than the punch's cutting edge profile, a suitable method is needed to machine the trimming die and punch into two parts along the cutting edge gap. Currently, flame cutting has large tolerances and requires tempering and cutting edge machining afterward; laser cutting cannot penetrate 100mm thick sheet metal; wire cutting is expensive; and while CNC milling offers high processing efficiency, it requires redesigning the die shape, cutting edge distribution, and blanking hole shape.

[0003] Utility model patent CN210816927U discloses a rapid automatic trimming device for upsetting blanks, including a machine body. Inside the machine body are an upper punch, a trimming die, a pushing mechanism, a scrap guide trough, and a blanking guide trough. The upper punch is positioned directly above the trimming die and opens and closes vertically relative to the trimming die. The upper punch includes a punch head. The trimming die includes a concave template with a blanking port. One end of the scrap guide trough corresponds to the concave template, and the other end extends to the outside of the machine body. The pushing mechanism corresponds to the concave template, and the trimming scrap remaining above the concave template after punching is pushed to the inlet end of the guide trough by the pushing mechanism. The inlet end of the blanking guide trough corresponds to the blanking port and is positioned below the concave template, with the other end extending to the outside of the machine body. Although the rapid automatic trimming equipment for upsetting blanks can reduce the labor intensity of workers and improve processing efficiency, it does not improve the mold structure and still cannot produce punches and trimming dies on the same blank. Utility Model Content

[0004] In order to enable the production of punches and trimming dies on the same blank using CNC milling, reduce the manufacturing cost of trimming dies, and improve the manufacturing efficiency of trimming dies and punches, and to achieve the above objectives, the technical solution adopted by this utility model is: a trimming die for processing punches using cutting edge waste, comprising an integrally set trimming die blank and a punch blank;

[0005] The punch blank is located at the center of the trimming die blank, and a first clearance groove is provided on the outer peripheral surface of the punch blank;

[0006] The cutting die blank is provided with a second clearance groove on the outer peripheral surface of the punch blank;

[0007] The first clearance groove and the second clearance groove together form a tool clearance for the CNC milling cutter to pass through.

[0008] Based on the above, in order to facilitate forming, the punch blank, the first clearance knife groove and the second clearance knife groove are respectively machined on the cutting die blank.

[0009] Based on the above, in order to improve the stability during the trimming operation, the lower side of the punch blank is also provided with a machined arc-shaped chuck, which is used to partially wrap the forging.

[0010] Based on the above, in order to facilitate cutting the edges, punch cutting edges are provided on both sides of the lower part of the arc-shaped claw.

[0011] Based on the above, in order to facilitate connection to the stamping machine, a punch boss for connecting to the external stamping machine is provided on the upper side of the punch blank, and the first clearance knife groove is provided on the outer peripheral surface of the punch boss.

[0012] Based on the above, the edge of the cutting die blank is provided with a stepped clearance hole, and the punch boss is provided with a threaded hole.

[0013] Based on the above, in order to facilitate material dropping during edge cutting, an outwardly inclined material dropping bevel is connected to one side of the groove of the second clearance knife.

[0014] This utility model has substantial features and advancements compared to existing technologies. Specifically, the cutting die for processing punches using waste cutting edge provided by this utility model is achieved by machining the cutting die shape and punch shape on a single blank. A second clearance groove is provided below the cutting edge of the cutting die, and a first clearance groove is provided on the edge of the punch. This creates a tool clearance for CNC milling within the space enclosed by the second and first clearance grooves. This enables the production of punches and cutting dies on the same blank using CNC milling, reducing the manufacturing cost of the cutting die and improving the manufacturing efficiency of the cutting die and punch. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the edge-cutting die structure for processing punches using waste material from the cutting edge, provided by this utility model.

[0016] Figure 2 This is a partial structural diagram of the cutting die for processing punches using waste material from the cutting edge, provided by this utility model.

[0017] Figure 3 This is a partial cross-sectional structural diagram of the cutting die for processing punches using waste material from the cutting edge, provided by this utility model.

[0018] Figure 4 This is a schematic diagram of the top of the cutting die punch that utilizes waste material from the cutting edge to process the punch, as provided by this utility model.

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the edge-cutting die punch that utilizes waste material from the cutting edge to process punches, as provided by this utility model.

[0020] Figure 6 This is a schematic diagram of the end face structure of the cutting die punch that utilizes waste material from the cutting edge to process the punch, as provided by this utility model.

[0021] Figure 7 This is a schematic diagram of the structure of the forging to be cut.

[0022] Figure 8 Figure 9 and Figure 10 This is a schematic diagram of the process of trimming the forging to be trimmed using the trimming die of the punch with the cutting edge provided by this utility model.

[0023] In the figure: 1. Trimming die blank; 2. Tool clearance; 3. Threaded hole; 4. Punch blank; 5. Trimming die cutting edge; 6. Trimming die cavity; 7. Blanking bevel; 8. Second clearance groove; 9. Blanking hole; 10. Punch cutting edge; 11. Arc-shaped chuck; 12. Punch boss; 13. First clearance groove; 14. Forging bar; 15. Flash; 16. Forging disc; 17. Stepped clearance hole. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0025] Example 1

[0026] This embodiment provides a cutting die for machining punches using scrap material from the cutting edge, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, it includes an integrally formed cutting die blank 1 and punch blank 4.

[0027] The punch blank 4 is positioned at the center of the trimming die blank 1, and a first clearance groove 13 is provided on the outer peripheral surface of the punch blank 4. A second clearance groove 8 is provided on the outer peripheral surface of the trimming die blank 1 corresponding to the punch blank 4. The first clearance groove 13 and the second clearance groove 8 together form a tool clearance 2 for the CNC milling cutter to pass through.

[0028] Specifically, after the cutting die blank 1 and the punch blank 4 are separated along the tool clearance 2 by using a CNC milling cutter, a cutting die cavity 6 will be formed on the cutting die blank 1. A cutting die cutting edge 5 will be formed on the cutting die cavity 6, and a blanking hole 9 will be formed at the bottom of the cutting die cavity 6.

[0029] Example 2

[0030] This embodiment provides a cutting die for processing punches using scrap material from the cutting edge. The main difference from Embodiment 1 is that, in this embodiment, in order to facilitate forming, the punch blank 4, the first clearance groove 13 and the second clearance groove 8 are respectively processed on the cutting die blank 1.

[0031] Example 3

[0032] This embodiment provides a cutting die for processing punches using scrap cutting edges. The main difference from Embodiment 1 is that, in this embodiment, to improve the stability during the cutting operation, an arc-shaped chuck 11 is machined on the lower side of the punch blank 4. The arc-shaped chuck 11 is used to partially enclose the forging. To facilitate cutting, punch cutting edges 10 are respectively provided on both sides of the lower part of the arc-shaped chuck 11.

[0033] Example 4

[0034] This embodiment provides a trimming die for processing punches using scrap material from the cutting edge. The main difference from Embodiment 1 is that, in this embodiment, to facilitate connection to a stamping machine, a punch boss 12 for external connection to the stamping machine is provided on the upper side of the punch blank 4. The first clearance groove 13 is provided on the outer peripheral surface of the punch boss 12. A stepped clearance hole 17 is provided on the edge of the trimming die blank 1, and a threaded hole 3 is provided on the punch boss 12.

[0035] To facilitate material dropping during edge trimming, the second clearance knife groove 8 is connected to an outwardly inclined material dropping bevel 7 on one side.

[0036] Specifically, when using the edge-trimming die made from the edge-trimming die of the punch using the cutting edge scrap provided by this utility model to trim the edges of forgings, such as... Figure 7 , Figure 8 , Figure 9 and Figure 10 The forging includes a forging bar 14, a forging disk 16, and flash 15 distributed around the forging bar 14 and the forging disk 16 respectively.

[0037] First, the forging with 15mm flash is placed into the cutting edge of the trimming die for positioning. Then, the punch moves downward so that the lower end face of the punch contacts the upper surface of the forging and applies downward pressure. The cutting edge of the punch and the cutting edge of the trimming die shear the flash, separating the flash from the forging and completing the trimming.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A cutting die for machining punches using scrap material from the cutting edge, characterized in that: Includes an integrally formed cutting die blank and punch blank; The punch blank is located at the center of the trimming die blank, and a first clearance groove is provided on the outer peripheral surface of the punch blank; The cutting die blank is provided with a second clearance groove on the outer peripheral surface of the punch blank; The first clearance groove and the second clearance groove together form a tool clearance for the CNC milling cutter to pass through.

2. The edge-cutting die for processing punches using scrap material from the cutting edge according to claim 1, characterized in that: The punch blank, the first clearance groove, and the second clearance groove are respectively machined on the cutting die blank.

3. The edge-cutting die for processing punches using scrap material from the cutting edge according to claim 1 or 2, characterized in that: The lower side of the punch blank is also provided with an arc-shaped chuck, which is used to partially enclose the forging.

4. The edge-cutting die for processing punches using scrap material from the cutting edge according to claim 3, characterized in that: The lower two sides of the arc-shaped chuck are respectively provided with punch cutting edges.

5. The edge-cutting die for processing punches using scrap material from the cutting edge according to claim 1, characterized in that: The upper side of the punch blank is provided with a punch boss for connecting to an external punching machine, and the first clearance knife groove is provided on the outer peripheral surface of the punch boss.

6. The edge-cutting die for processing punches using scrap material from the cutting edge according to claim 5, characterized in that: The edge of the cutting die blank is provided with stepped clearance holes, and the punch boss is provided with threaded holes.

7. The edge-cutting die for processing punches using scrap material from the cutting edge according to claim 1, characterized in that: The second clearance knife groove is connected to an outwardly inclined blanking bevel.

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