Shape trimming die after cold heading forming

Abstract

The utility model relates to the technical field of cold heading trimming dies, in particular to a shape trimming die after cold heading forming, which comprises a stamping die unit and a main die unit, the stamping die unit comprises a stamping die shell and a knife edge mounted at the front end of the stamping die shell, and an ejection component is arranged in the stamping die unit; the main die unit comprises a main die shell and a trimming assembly installed in the main die shell, and a push-out assembly is further arranged on the inner side of the main die shell. According to the trimming die technology, the compound die technology is adopted, products and waste materials can be separated at the same time in the discharging process, the production efficiency is improved, and the production cost is reduced. And secondly, a product column is positioned through an inner hole of a cutting punch, the die can be directly installed in a cold heading machine during use, edge cutting operation can be further achieved after cold heading, other equipment does not need to be introduced, the machining efficiency is greatly improved, the overall assembly and machining structure of the die is simple, cost is low, and rapid maintenance and assembly can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of cold heading and trimming mold technology, and in particular to a mold for trimming the outer shape after cold heading. Background Technology

[0002] Cold heading, a metalworking method, is widely used in the manufacture of various fasteners and complex-shaped metal parts. This technology improves material utilization and reduces energy consumption by plastically deforming metal at room temperature without heating. However, with industrial development and increasingly stringent requirements for product dimensions and specifications, existing cold heading technology faces new challenges.

[0003] During cold heading, due to process limitations, the product's dimensions and edge quality often fail to meet high precision requirements. To meet these high-precision specifications, the industry commonly employs additional machining or stamping / trimming processes after cold heading. While this method improves dimensional accuracy and edge quality, it also introduces new problems: it increases the number of processes, thus raising production costs; furthermore, the added processes complicate quality control, further increasing quality control costs. Utility Model Content

[0004] The purpose of this utility model is to solve the shortcomings of existing technologies, such as the increased number of processes, which leads to higher production costs, and to propose a cold heading forming edge trimming mold.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Design a die for trimming the outer shape after cold heading, including a punching unit and a main die unit:

[0007] The die unit includes a die shell and a cutting edge installed at the front end of the die shell, and an ejection assembly is provided in the die unit;

[0008] The main mold unit includes a main mold shell and a cutting edge assembly installed in the main mold shell, wherein an ejection assembly is also provided on the inner side of the main mold shell.

[0009] Furthermore, the ejection assembly includes a die pusher rod that is movably inserted into the die housing, and the front end of the die pusher rod is connected to a die ejector pin.

[0010] The ejector pin of the die is movably inserted into the inside of the cutting edge.

[0011] Furthermore, a spring is fixedly connected between the rear end of the die pusher and the die housing.

[0012] Furthermore, the edge-cutting assembly includes a fixing block fixed inside the main mold shell and a pad block installed at the rear end of the fixing block;

[0013] A cutting punch is fixedly installed at the front end of the fixed block, and the cutting punch and the cutting edge are arranged opposite to each other.

[0014] Furthermore, the ejection assembly includes a main mold pusher rod that passes through the inside of the main mold shell. A main mold ejector pin is fixedly installed at the front end of the main mold pusher rod. The main mold ejector pin passes through the fixing block and the pad block and passes through the cutting punch.

[0015] Furthermore, a rod is fixedly installed at the tail end of the main mold ejector pin. The front end of the rod passes through the fixing block and the pad block in sequence and is fixedly connected to a scrap removal slider. The scrap removal slider slides inside the main mold shell and is sleeved on the outside of the cutting punch.

[0016] Furthermore, the tail end of the main mold ejector pin has a stepped portion, the rod is connected to the stepped portion, and the stepped portion and the pad block slide stop are provided.

[0017] The present invention provides a cutting die for the outer shape after cold heading, which has the following advantages: The cutting die technology of the present invention adopts a composite mold process, and the product and waste can be separated simultaneously during the blanking process. Secondly, the product is positioned by the inner hole of the cutting punch to position the product column. When in use, the die can be directly installed in the cold heading machine, and the cutting operation can be further realized after cold heading without the need to introduce other equipment, which greatly improves the processing efficiency. The overall assembly and processing structure of the die is simple and the cost is low. It can be quickly repaired and assembled, which greatly improves the cutting efficiency and stability of cold heading. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] In the diagram: 1. Die unit; 11. Die shell; 12. Cutting edge; 13. Die push bar; 14. Die ejector pin; 15. Spring; 2. Main die unit; 21. Main die shell; 22. Fixing block; 23. Pad block; 24. Cutting punch; 25. Main die push bar; 26. Main die ejector pin; 261. Step section; 27. Rod; 28. Scrap removal slider; 3. Product. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1 As one embodiment of this utility model, a cold heading forming edge trimming die is disclosed. Specifically, the edge trimming die includes a punching die unit 1 and a main die unit 2.

[0022] The die unit 1 includes a die shell 11 and a cutting edge 12 installed at the front end of the die shell 11. An ejection assembly is provided in the die unit 1.

[0023] The main mold unit 2 includes a main mold shell 21 and a cutting edge assembly installed in the main mold shell 21, wherein an ejection assembly is also provided on the inner side of the main mold shell 21.

[0024] In some embodiments, the ejection assembly of the present invention includes a die pusher 13 movably inserted into the die housing 11, and the front end of the die pusher 13 is connected to a die ejector pin 14. In the initial state, the front end of the die ejector pin 14 extends to the outside of the die housing 11.

[0025] The ejector pin 14 of the punch is movably inserted into the inside of the cutting edge 12, and the cutting edge 12 is fixed to the front end of the punch mold shell 11 for subsequent cutting of the product 3.

[0026] Of course, in order to reset the die ejector pin 14 in subsequent actions, a spring 15 is fixedly connected between the rear end of the die pusher 13 and the die shell 11 in this embodiment.

[0027] Furthermore, in this embodiment, the edge-cutting assembly includes a fixing block 22 fixed inside the main mold shell 21 and a pad block 23 installed at the rear end of the fixing block 22;

[0028] A cutting punch 24 is fixedly installed at the front end of the fixed block 22, and the cutting punch 24 and the cutting edge 12 are arranged opposite to each other.

[0029] Based on the above embodiments, the ejection component in this embodiment includes a main mold pusher 25 that passes through the main mold shell 21. The main mold pusher 25 is used to connect with the driving component in the equipment to realize push control. A main mold ejector pin 26 is fixedly installed at the front end of the main mold pusher 25. The main mold ejector pin 26 is used to eject the product 3 in the cutting punch 24. The main mold ejector pin 26 passes through the fixing block 22 and the pad block 23 and passes through the cutting punch 24.

[0030] Preferably, in this embodiment, a rod 27 is fixedly installed at the tail end of the main mold ejector pin 26. The front end of the rod 27 passes through the fixing block 22 and the pad block 23 in sequence and is fixedly connected to a scrap removal slider 28. The scrap removal slider 28 slides inside the main mold shell 21 and is sleeved on the outside of the cutting punch 24. Specifically, in this embodiment, the scrap removal slider 28 can be used to clean the scrap remaining in the die shell 11. Since the scrap removed from the product 3 will fall into the main mold shell 21 after the cutting punch 24 and the cutting edge 12 cut the product 3, the scrap removed from the product 3 will fall into the main mold shell 21. Therefore, in this embodiment, the scrap removal slider 28 is linked by the rod 27 to eject the scrap in the main mold shell 21. Optionally, three rods 27 can be configured in this embodiment.

[0031] It should be noted that, in this embodiment, the tail end of the main mold ejector pin 26 has a stepped portion 261, the rod 27 is connected to the stepped portion 261, and the stepped portion 261 and the pad block 23 slide stop.

[0032] During operation, the equipment adopts a multi-station cold heading machine. The punching die unit 1 and the main die unit 2 are installed and fixed in the equipment. When the robot arm clamps the product 3 to the process, the punching die unit 1, under the operation of the equipment slide block mold closing, the punching die ejector pin 14 begins to push the product 3 into the main die unit 2. Under the thrust, the product 3 causes the main die ejector pin 26 and the main die push bar 25 to retreat synchronously.

[0033] When the punching die unit 1 and the main die unit 2 are closed, the cutting punch 24 and the cutting edge 12 begin to cut the material. At this time, the outer shape of the product 3 is punched and cut into the cutting edge 12, and the waste material begins to separate.

[0034] After the mold is closed, the mold opens. At this time, under the action of the spring force of the spring 15, the product 3 pushes the die pusher 13 and the die ejector pin 14 to continue to push the product 3 out of the die through the cutting edge 12. At the same time, after the product 3 is cut off, the main die pusher 25 starts to push forward under the action of the push force of the equipment. At this time, under the action of the main die pusher 25, the main die ejector pin 26 starts to push the product 3 out and separate. At the same time, the main die ejector pin 26 pushes the rod 27, and the rod 27 continues to push the scrap material slider. At this time, the scrap material is removed from the main die unit 2. The above actions are repeated during the mold opening and closing process of the equipment slider.

[0035] In summary, the edge trimming mold technology of this utility model adopts a composite mold process, in which product 3 and waste can be separated simultaneously during the blanking process. Furthermore, the positioning of product 3 is achieved by positioning the product column through the inner hole of the cutting punch 24. The overall assembly and processing structure of the mold is simple and low in cost, and it can achieve quick maintenance and assembly, greatly improving the efficiency and stability of cold heading edge trimming.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A cold heading forming edge trimming die, comprising a punching die unit (1) and a main die unit (2), characterized in that: The die unit (1) includes a die shell (11) and a cutting edge (12) installed at the front end of the die shell (11). An ejection assembly is provided in the die unit (1). The main mold unit (2) includes a main mold shell (21) and a cutting edge assembly installed in the main mold shell (21), wherein an ejection assembly is also provided on the inner side of the main mold shell (21); the ejection assembly includes a die pusher (13) movably inserted into the die shell (11), and the front end of the die pusher (13) is connected to a die ejector pin (14). The die ejector pin (14) is movably inserted into the inside of the cutting edge (12); a spring (15) is fixedly connected between the rear end of the die pusher (13) and the die shell (11); the trimming assembly includes a fixing block (22) fixed inside the main die shell (21) and a pad block (23) installed at the rear end of the fixing block (22). A cutting punch (24) is fixedly installed at the front end of the fixed block (22), and the cutting punch (24) and the cutting edge (12) are arranged opposite to each other.

2. The cold heading forming edge trimming mold according to claim 1, characterized in that: The ejection assembly includes a main mold pusher (25) that passes through the main mold shell (21). A main mold ejector pin (26) is fixedly installed at the front end of the main mold pusher (25). The main mold ejector pin (26) passes through the fixing block (22) and the pad block (23) and passes through the cutting punch (24).

3. The cold heading forming edge trimming mold according to claim 2, characterized in that: A rod (27) is fixedly installed at the tail end of the main mold ejector pin (26). The front end of the rod (27) passes through the fixed block (22) and the pad block (23) in sequence and is fixedly connected to the scrap removal slider (28). The scrap removal slider (28) slides inside the main mold shell (21) and is sleeved on the outside of the cutting punch (24).

4. The cold heading forming edge trimming mold according to claim 3, characterized in that: The tail end of the main mold ejector pin (26) has a stepped portion (261), the rod (27) is connected to the stepped portion (261), wherein the stepped portion (261) and the pad (23) slide stop.

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