A stable new cold header belt retraction material receiving device

Abstract

The utility model relates to cold heading processing technical field, concretely is a kind of stable new cold header with retreat material receiving device, it is characterized by: the main mould right side is equipped with main mould cushion block, punch rod ejector pin is equipped in the main mould cushion block, punch rod ejector pin right side is equipped with punch rod ejector pin cover, the length of punch rod ejector pin cover is less than the length of punch rod ejector pin, polyurethane spring is equipped in the upper of punch rod ejector pin cover, punch rod ejector pin cover and polyurethane spring are equipped in main mould cushion block, the right side of punch rod ejector pin cover is rear support ejector pin (11);Spring is equipped in the left side of punch rod.The utility model increases a punch rod ejector pin cover and adjusts the structure of punch rod ejector pin, to realize the punch rod material receiving resistance of eliminating punch rod retreat stroke section, while also can not cut off the material receiving resistance required for material receiving, realizes the function of punch rod stable retreat and stable material receiving.

Description

Technical Field

[0001] This utility model relates to the field of cold heading technology, specifically a stable new type of cold heading machine with a retraction receiving device. Background Technology

[0002] Cold heading machines, based on the principle of cold forming, are specialized equipment used for the mass production of standard bolts, nuts, and other fasteners. Most cold heading machines are multi-station machines. In some cases, when the blank is clamped by clamps and moved from one station to the next, there is instability in its entry into the main die cavity, which can easily cause risks such as cross-section material hitting the die, thus disrupting continuous production. In some critical applications, punches require receiving devices; commonly used receiving devices include spring receiving devices, tension spring receiving devices, and ball screw receiving devices, etc.

[0003] In certain situations, the head of the punch is relatively high, and the blank needs to be received before entering the mold. In this case, when the clamps move while holding the blank, the blank is prone to scraping the head of the punch, causing the clamps to hold the blank at an angle, which may result in the risk of the blank hitting the mold.

[0004] The solution to the problem of unstable blank entry into the main mold cavity is to apply a certain resistance to the punch, so that the blank is first stopped by the punch when it enters the main mold cavity, thereby ensuring that the blank does not fall down or tilt when the upper punch pushes the blank into the main mold cavity.

[0005] To address the issue of billet scraping against the punch head during clamping and movement when using a high-head punch, a spring is added to the tail of the punch. This spring forces the punch to retract after it extends. However, when the punch needs to receive material, if the spring force is too small, the resistance to receiving the material will offset the spring force, preventing the punch from retracting completely. Conversely, if the spring force is too large, it will offset the resistance needed to receive the material, resulting in unstable material reception.

[0006] Therefore, a stable receiving device with a retraction function is needed. Summary of the Invention

[0007] The purpose of this invention is to provide a stable new type of cold heading machine belt retraction receiving device, which solves the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: A stable new type of cold heading machine with a retraction receiving device includes a main mold and an upper mold. The main mold contains a punch, and a clamp is provided on the left side of the punch. The upper mold contains an upper punch, an upper punch sleeve, and an upper punch receiving spring. The right side of the main mold contains a main mold pad, and the main mold pad contains a punch ejector rod. A punch ejector rod sleeve is fitted on the right side of the punch ejector rod, and the length of the punch ejector rod sleeve is less than the length of the punch ejector rod. A polyurethane spring is provided above the punch ejector rod sleeve. The punch ejector rod sleeve and the polyurethane spring are located inside the main mold pad. A rear support ejector rod is located on the right side of the punch ejector rod sleeve; a spring is fitted on the left side of the punch.

[0009] Furthermore, the punch rod is provided with a limiting step that cooperates with the punch rod sleeve.

[0010] Furthermore, the length difference between the punch rod sleeve and the punch rod matches the spring's recovery length.

[0011] Furthermore, the polyurethane spring is connected to the main mold pad by screws.

[0012] Furthermore, the spring is a compression spring, and a spring washer is provided on the right side.

[0013] Furthermore, a limiting step is provided at the right end of the punch.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: By adding a punch pin sleeve and adjusting the structure of the punch pin, the punch receiving resistance during the punch retraction stroke is eliminated, while the receiving resistance required for receiving the material is not reduced, thus achieving the functions of stable punch retraction and stable material receiving. Attached Figure Description

[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the punch rod of this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the punch of this utility model.

[0019] In the picture: 1. Clamp; 2. Blank; 3. Main mold; 4. Spring; 5. Spring washer; 6. Punch; 7. Punch ejector pin; 8. Punch ejector pin sleeve; 9. Mold pad; 10. Polyurethane spring; 11. Rear support ejector pin; 12. Previous clamp; 13. Previous blank; 14. Upper punch; 15. Upper punch sleeve; 16. Upper punch receiving spring. Detailed Implementation

[0020] Please see Figure 1-3 A stable new type of cold heading machine with a retraction receiving device includes a main mold 3 and an upper mold. The main mold 3 is equipped with a punch 6, and a clamp 1 is provided on the left side of the punch 6. The upper mold is equipped with an upper punch 14, an upper punch sleeve 15, and an upper punch receiving spring 16. The main mold 3 is equipped with a main mold pad 9 on the right side, and a punch ejector rod 7 is provided inside the main mold pad 9. A punch ejector rod sleeve 8 is fitted on the right side of the punch ejector rod 7. The length of the punch ejector rod sleeve 8 is less than the length of the punch ejector rod 7. A polyurethane spring 10 is provided above the punch ejector rod sleeve 8. The punch ejector rod sleeve 8 and the polyurethane spring 10 are located inside the main mold pad 9. A rear support ejector rod 11 is located on the right side of the punch ejector rod sleeve 8. A spring 4 is fitted on the left side of the punch 6.

[0021] like Figure 2 As shown, the punch rod 7 is provided with a limiting step that cooperates with the punch rod sleeve 8.

[0022] The length difference between the punch rod sleeve 8 and the punch rod 7 matches the recovery length of the spring 4.

[0023] The polyurethane spring 10 is connected to the main mold pad 9 by screws.

[0024] Spring 4 is a compression spring, and a spring washer 5 is provided on the right side.

[0025] like Figure 3 As shown, a limiting step is provided at the right end of the punch 6.

[0026] The clapper is a component on the ejector device of the cold heading machine. It has a large bolt on it, and the ejection position of the punch is controlled by adjusting the exposed length of the bolt. The movement of this device is a back-and-forth swing. When it swings forward, the punch is ejected first, and when it swings backward, the punch is in an unloaded state. The swing of the clapper of the cold heading machine drives the rear support rod 11 to move to the left. The rear support rod 11 abuts against the punch ejector rod 7 and moves to the left. When it has moved forward a distance L1, the rear support rod 11 begins to abut against the punch top sleeve 8 and move to the left. During this process, the punch rod 7 drives the punch 6 and the blank 2 out of the mold cavity of the main mold 3. The spring 4 at the rear of the punch 6 is compressed until the blank 2 enters the clamp 1. At this time, the clapper is in the foremost position. Then the clapper swings backward, and the rear support rod 11 is in a state of no force. Under the action of the elastic force of the spring 4, the punch 6 drives the punch rod 7 to move to the right. When the movement is L1 distance, the elastic force of the spring 4 is completely released. At this time, the step of the punch rod 7 contacts the end face of the punch rod sleeve 8. Then the clamp 1 carries the blank 2 to the next station. The clamp 12 of the previous station sends the previous blank 13 to the mold cavity opening of the main mold 3. Driven by the upper punch 14, the blank 13 moves backward a short distance and begins to contact the head of the punch 6. The punch 6 has a certain resistance due to the friction of the polyurethane spring 10 acting on the punch rod sleeve 8, which plays the role of receiving the material. The upper punch 14, upper punch sleeve 15, and upper punch receiving spring 16 continue to move to the right, feeding the blank 13 into the main mold 3. During this process, the blank 13 drives the punch 6, punch ejector 7, punch ejector sleeve 8, and rear support ejector 11 back to their original positions, while the blank 13 is formed into blank 2. This cycle repeats, achieving a stable receiving and retraction function for the punch 6. This not only reduces the scrap rate in cold heading production and the risk of horizontal material collision with the mold during debugging, but also lowers the skill requirements for cold heading debugging personnel and improves the efficiency of cold heading debugging.

[0027] Furthermore, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the specific embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stable new type of cold heading machine with a retraction receiving device, comprising a main mold (3) and an upper mold, wherein a punch (6) is provided inside the main mold (3), a clamp (1) is provided on the left side of the punch (6), and an upper punch (14), an upper punch sleeve (15) and an upper punch receiving spring (16) are provided inside the upper mold, characterized in that: The main mold (3) is provided with a main mold pad (9) on the right side. The main mold pad (9) is provided with a punch rod (7). The punch rod (7) is provided with a punch rod sleeve (8) on the right side. The length of the punch rod sleeve (8) is less than the length of the punch rod (7). A polyurethane spring (10) is provided above the punch rod sleeve (8). The punch rod sleeve (8) and the polyurethane spring (10) are located inside the main mold pad (9). The punch rod sleeve (8) is provided with a rear support rod (11) on the right side. The punch (6) is provided with a spring (4) on the left side.

2. The stable novel cold heading machine with retraction receiving device according to claim 1, characterized in that: The punch rod (7) is provided with a limiting step that cooperates with the punch rod sleeve (8).

3. The stable novel cold heading machine with retraction receiving device according to claim 1, characterized in that: The length difference between the punch top sleeve (8) and the punch top rod (7) matches the recovery length of the spring (4).

4. The stable novel cold heading machine with retraction receiving device according to claim 1, characterized in that: The polyurethane spring (10) is connected to the main mold pad (9) by screws.

5. A stable novel cold heading machine with a retraction receiving device according to claim 1, characterized in that: The spring (4) is a compression spring, and a spring washer (5) is provided on the right side.

6. A stable novel cold heading machine with a retraction receiving device according to claim 1, characterized in that: The punch (6) has a limiting step on its right end.

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