A cold heading special-shaped part support rod, support device and trimming system

Abstract

The utility model relates to the cold heading manufacturing field among mechanical manufacturing, especially a kind of cold heading special-shaped part support rod, supporting device and trimming system. Wherein, a kind of cold heading special-shaped part support rod, including main ejector pin (1) and female die sleeve pipe (2), slidingly connected with female die ejector pin (11) on the main ejector pin (1), the end of female die ejector pin (11) far from the main ejector pin (1) is inserted into female die sleeve pipe (2).The utility model is improved by smaller, while realizing the accurate positioning of the part to be processed fixed, significantly increase the contact area between part and its support structure. The increase of contact area effectively reduces or completely eliminates the risk of part rod deformation, thereby greatly improving the processing yield, and has great market promotion value.

Description

Technical Field

[0001] This utility model relates to the field of cold heading manufacturing in mechanical manufacturing, and in particular to a support rod, support device and edge cutting system for cold heading irregular parts. Background Technology

[0002] In the cold heading process of metal parts (especially screws, bolts, rivets, pins, etc.), for irregularly shaped parts with non-standard geometries, the forming process usually includes a trimming step. The trimming step aims to remove burrs, flash, and excess connecting material formed at the head or specific parts of the part after stamping or forging to obtain the final net profile.

[0003] In actual production, some irregularly shaped parts, due to their irregular shape, uneven stress, or difficulty in positioning, are prone to unexpected plastic deformation. This causes the parts' geometric dimensions and shapes to deviate from design requirements, failing to meet strict dimensional and geometric tolerances. Specifically, when dealing with parts with slender rods, the impact and shear forces generated by the cutting edge are easily transmitted to the rod, causing plastic bending deformation (i.e., "pressure bending"). This not only affects the straightness and coaxiality of the final product but also leads to subsequent assembly difficulties, resulting in scrap. Furthermore, slight bending of the rod may be overlooked during subsequent processing or inspection, leading to the release of products with potential quality issues.

[0004] Therefore, those skilled in the art are dedicated to developing a support rod, support device and edge cutting system for cold heading irregular parts. Utility Model Content

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by this utility model is to provide a support rod, support device and cutting system for cold heading special-shaped parts that can effectively improve the quality of finished parts.

[0006] To achieve the above objectives, this utility model provides a support rod for cold-forged irregular parts, including a main ejector pin and a female mold sleeve. A female mold ejector pin is slidably connected to the main ejector pin, and the end of the female mold ejector pin away from the main ejector pin extends into the female mold sleeve.

[0007] Preferably, the main ejector pin is provided with an axially extending receiving hole, and a first elastic element is provided in the receiving hole. One end of the first elastic element is connected to the female mold ejector pin, and the other end is connected to the bottom of the receiving hole.

[0008] Preferably, the female mold ejector pin includes a first connecting section and a second connecting section arranged coaxially, wherein the diameter of the second connecting section is larger than the inner diameter of the female mold sleeve.

[0009] Preferably, the female mold sleeve is provided with a first limiting boss, which extends radially along the female mold sleeve.

[0010] This utility model also provides a cold heading irregular part trimming device, including the cold heading irregular part support rod as described above.

[0011] Preferably, the female mold sleeve is fitted with an outer mold sleeve, and a female mold core is slidably fitted between the female mold sleeve and the outer mold sleeve. The inner sidewall of the female mold core is provided with a first clearance step that cooperates with the first limiting boss.

[0012] Preferably, a female mold pad is provided at the end of the outer mold sleeve away from the female mold core. The female mold pad, the female mold core, and the outer mold sleeve together form a relief cavity. A second elastic element is provided in the relief cavity. One end of the second elastic element is connected to the female mold pad, and the other end is connected to the female mold core.

[0013] Preferably, the female mold pad has an axially extending reinforcing post at one end near the female mold core, and the second elastic element is sleeved on the reinforcing post.

[0014] Preferably, the outer side wall of the female mold core is provided with a radially extending second limiting boss, and the inner side wall of the outer mold sleeve is provided with a second clearance step that cooperates with the second limiting boss.

[0015] This utility model also provides a cold heading irregular part trimming system, including any of the above-described cold heading irregular part support devices, and further including a trimming die, wherein the trimming die coincides with the axis of the female die sleeve.

[0016] The beneficial effects of this utility model are as follows: Through minor improvements, this utility model achieves precise positioning and fixation of the workpiece while significantly increasing the contact area between the workpiece and its supporting structure. This increased contact area effectively reduces or completely eliminates the risk of deformation of the workpiece's rod, thereby greatly improving the yield rate and possessing significant market potential. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of the support rod for cold-forged irregular parts in a specific embodiment of this utility model.

[0018] Figure 2 yes Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0019] Figure 3 This is a cross-sectional structural diagram of a specific embodiment of the present invention.

[0020] Figure 4 This is a cross-sectional structural diagram of the female mold core in a specific embodiment of this utility model.

[0021] Figure 5This is a cross-sectional structural diagram of the outer mold sleeve in a specific embodiment of this utility model.

[0022] 1. Main ejector pin; 11. Female mold ejector pin; 11a. First connecting section; 11b. Second connecting section; 12. Accommodating hole; 12a. First elastic element; 2. Female mold sleeve; 21. First limiting boss; 3. Outer mold sleeve; 31. Second clearance step; 4. Female mold core; 41. First clearance step; 42. Second limiting boss; 5. Female mold pad; 51. Reinforcing pillar; 6. Clearance cavity; 61. Second elastic element; 7. Trimming die; 8. Part. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific manner. Therefore, they should not be construed as limitations on the present invention. Terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] like Figure 1-5 As shown, a cold-forged irregular part support rod includes a main ejector pin 1 and a female mold sleeve 2. The main ejector pin 1 is columnar and made of high-strength alloy steel, with a female mold ejector pin 11 slidably connected to it, providing a mounting base for the female mold ejector pin 11. Specifically, one end of the main ejector pin 1 has an axially extending receiving hole 12, within which the female mold ejector pin 11 is fitted with a clearance fit. Further, a first elastic element 12a is provided within the receiving hole 12, with one end connected to the female mold ejector pin 11 and the other end connected to the bottom of the receiving hole 12, providing support for the female mold ejector pin 11. Even further, the end of the main ejector pin 1 near the female mold ejector pin 11 is coaxially provided with a female mold sleeve 2 extending axially along the main ejector pin 1, with the end of the female mold ejector pin 11 away from the main ejector pin 1 extending into the female mold sleeve 2 and sliding back and forth along the inner wall of the female mold sleeve 2. The female mold sleeve 2 provides a base for the part 8 to be processed, especially for parts 8 with slender rods, which can be fixed by inserting the rods into the female mold sleeve 2. Unlike the point contact mode in existing support structures where the ejector pin directly abuts against the rod of the part 8, this application, by setting the female mold sleeve 2, not only achieves the placement and fixation of the part 8 to be processed, but also allows the end of the female mold sleeve 2 to abut against the end face of the part 8 to be processed. By increasing the contact area between the support structure and the part 8 to be processed, the deformation of the rod of the part 8 is reduced or completely eliminated, thereby improving the yield of the part 8 to be processed.

[0025] In this embodiment, the female mold ejector pin 11 includes a first connecting segment 11a and a second connecting segment 11b arranged coaxially. The first connecting segment 11a and the second connecting segment 11b are manufactured using an integral molding process. In other embodiments, they can also be configured as detachable connections, such as snap-fit ​​connections, magnetic connections, threaded connections, etc. The advantage of the detachable connection of the first connecting segment 11a and the second connecting segment 11b is that the combination of the first connecting segment 11a and the second connecting segment 11b can be adjusted according to the type of part 8 to be processed, thereby changing their length and improving the adaptability of the female mold ejector pin 11.

[0026] In this embodiment, an annular first limiting boss 21 is provided on the outer wall of the female mold sleeve 2, and the first limiting boss 21 extends radially along the female mold sleeve 2.

[0027] This utility model also provides a cold-forging irregular part support device, including the cold-forging irregular part support rod as described above, and an outer mold sleeve 3. In this embodiment, the outer mold sleeve 3 is sleeved outside the female mold sleeve 2, and a female mold core 4 is slidably fitted between the female mold sleeve 2 and the outer mold sleeve 3. That is, in this application, the cold-forging irregular part trimming device includes a female mold sleeve 2, a female mold core 4, and an outer mold sleeve 3 arranged sequentially from the inside to the outside. Among them, the inner sidewall of the female mold core 4 is provided with a first clearance step 41 that cooperates with the first limiting boss 21. The mutual abutment and cooperation of the first limiting boss 21 and the first clearance step 41 realize the limiting cooperation between the female mold core 4 and the female mold sleeve 2. Furthermore, a female mold pad 5 is provided at the end of the outer mold sleeve 3 away from the female mold core 4. The female mold pad 5, the female mold core 4, and the inner wall of the outer mold sleeve 3 together form a clearance cavity 6. A second elastic element 61 is provided in the clearance cavity 6. One end of the second elastic element 61 is connected to the female mold pad 5, and the other end is connected to the female mold core 4. The second elastic element 61 provides support for the female mold core 4. In this embodiment, both the first elastic element 12a and the second elastic element 61 are springs. Other elastic support elements of the same type can also be used in other embodiments.

[0028] In this embodiment, the female mold pad 5 is also provided with a reinforcing column 51 extending along the axial direction of the female mold pad 5 at one end near the female mold core 4, and the second elastic member 61 is sleeved on the reinforcing column 51. The reinforcing column 51 provides guidance and support for the second elastic member 61.

[0029] In this embodiment, the outer side wall of the female mold core 4 is provided with a radially extending second limiting boss 42, and the inner side wall of the outer mold sleeve 3 is provided with a second clearance step 31 that cooperates with the second limiting boss 42. The limiting cooperation between the female mold core 4 and the outer mold sleeve 3 is achieved through the mutual abutment and cooperation of the second limiting boss 42 and the second clearance step 31.

[0030] This utility model also provides a cold heading irregular part trimming system, including the cold heading irregular part support device as described above, and also includes a trimming die 7. The trimming die 7 is aligned with the axis of the female die sleeve 2. The trimming die is provided with a receiving cavity. By setting the receiving cavity to receive the part, the burrs and excess connecting material on its edge are removed to obtain the final clean outline.

[0031] In use, the part to be processed 8 is placed and fixed on the female mold sleeve 2, and its rod is inserted into the female mold sleeve 2 so that it abuts against the end of the female mold ejector pin 11. At this time, the first elastic element 12a is in a freely extended state. After fixing is completed, the equipment is started, and the trimming die 7 pushes the part to move in the direction close to the main ejector pin 1. At this time, the first elastic element 12a is gradually compressed until the end face of the part to be processed 8 abuts against the end of the female mold sleeve 2. Under the limit of the main ejector pin 1 and the female mold sleeve 2, the part to be processed 8 stops moving. Subsequently, the trimming die 7 continues to move in the direction close to the main ejector pin 1 to perform trimming operation. When trimming, the end of the trimming die 7 abuts against the female mold core 4. After the trimming die 7 abuts against the female mold core 4, it pushes the female mold core 4 to move synchronously and compresses the second elastic element 61 to make way for the trimming die until trimming is completed. After trimming is completed, under the elastic reset action of the second elastic element 61, the trimming die 7 is pushed to move back in the opposite direction. When the trimming die 7 disengages from the processed part 8, the first elastic element 12a also pushes the part 8 away from the main ejector pin 1 by a distance under the action of elastic reset (after multiple tests, the ejection distance is about 1.5mm), so that the end face of the part 8 disengages from the end of the female mold sleeve 2 to facilitate the subsequent removal and collection process.

[0032] This application, through minor improvements, significantly increases the contact area between the part and its supporting structure while achieving precise positioning and fixation of the workpiece. This increased contact area effectively reduces or completely eliminates the risk of deformation of the part's rod, thereby greatly improving the machining yield and possessing significant market potential.

[0033] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A support rod for cold-forged irregular parts, characterized in that: It includes a main ejector pin (1) and a female mold sleeve (2). A female mold ejector pin (11) is slidably connected to the main ejector pin (1). One end of the female mold ejector pin (11) away from the main ejector pin (1) extends into the female mold sleeve (2).

2. The cold-forged irregular part support rod as described in claim 1, characterized in that: The main ejector pin (1) is provided with an axially extending receiving hole (12), and a first elastic element (12a) is provided in the receiving hole (12). One end of the first elastic element (12a) is connected to the female mold ejector pin (11), and the other end is connected to the bottom of the receiving hole (12).

3. The cold-forged irregular part support rod as described in claim 2, characterized in that: The female mold ejector pin (11) includes a first connecting section (11a) and a second connecting section (11b) arranged coaxially, and the diameter of the second connecting section (11b) is larger than the inner diameter of the female mold sleeve (2).

4. The cold-forged irregular part support rod as described in claim 1, 2, or 3, characterized in that: The female mold sleeve (2) is provided with a first limiting boss (21), which extends radially along the female mold sleeve (2).

5. A support device for cold-forged irregular parts, characterized in that: Includes the cold-forged irregular part support rod as described in any one of claims 1-4.

6. The cold-forging irregular part support device as described in claim 5, characterized in that: The female mold sleeve (2) is fitted with an outer mold sleeve (3), and a female mold core (4) is slidably fitted between the female mold sleeve (2) and the outer mold sleeve (3). The inner side wall of the female mold core (4) is provided with a first clearance step (41) that cooperates with the first limiting boss (21).

7. The cold-forging irregular part support device as described in claim 6, characterized in that: The outer mold sleeve (3) is provided with a female mold pad (5) at one end away from the female mold core (4). The female mold pad (5), the female mold core (4) and the outer mold sleeve (3) together form a relief cavity (6). A second elastic member (61) is provided in the relief cavity (6). One end of the second elastic member (61) is connected to the female mold pad (5), and the other end is connected to the female mold core (4).

8. The cold-forging irregular part support device as described in claim 7, characterized in that: The female mold pad (5) has an axially extending reinforcing column (51) at one end near the female mold core (4), and the second elastic element (61) is sleeved on the reinforcing column (51).

9. The cold-forging irregular part support device as described in claim 6, characterized in that: The outer side wall of the female mold core (4) is provided with a radially extending second limiting boss (42), and the inner side wall of the outer mold sleeve (3) is provided with a second clearance step (31) that cooperates with the second limiting boss (42).

10. A cold-forging irregular-shaped part trimming system, comprising the cold-forging irregular-shaped part support device as described in any one of claims 5-9, characterized in that: It also includes a trimming die (7), which is aligned with the axis of the female mold sleeve (2).

Images