I-shaped sleeve cold forming device

Abstract

The present invention discloses an I-shaped sleeve cold forming device, which relates to the technical field of I-shaped sleeve production, and comprises a base, a push rod is elastically and telescopically arranged on the base, and a sink groove is provided on the push rod for facilitating cold heading of the end of the I-shaped sleeve; inclined guide blocks are relatively arranged on both sides of the push rod, and the inclined guide blocks are elastically and telescopically arranged on the base, and the distance between the inclined surfaces of the two inclined guide blocks gradually decreases along the direction close to the push rod, and the inclined surfaces of the inclined guide blocks are slidably connected with clamping half blocks, and clamping holes are provided on the opposite surfaces of the two clamping half blocks; a punch is lifted and lowered above the two inclined guide blocks, and a punch is detachably connected to the punch, and the punch is coaxially arranged with the clamping hole. The present invention elastically arranges a push rod on the base, and two clamping half blocks that are opened and closed and slidably arranged, and after the cold heading of the I-shaped sleeve is completed, the push rod is used to lift the two clamping half blocks, and the two clamping half blocks are pushed to separate from each other, so as to facilitate the removal of the processed I-shaped sleeve.

Description

Technical Field

[0001] The invention relates to the technical field of I-shaped sleeve production, and more specifically, to an I-shaped sleeve cold forming device. Background Art

[0002] I-sleeves are the most common parts in the fastener field and are frequently used in various screw locking assemblies.

[0003] For the existing I-shaped sleeve processing method, such as Figure 1 As shown, firstly, the catheter is inserted into the punch rod, and then the punch rod connecting catheter is inserted into the bottom die, the punch die is punched down, and a straight catheter without flange is formed by cold heading; then the flange is punched to form an I-shaped sleeve of the straight catheter without flange. The specific method is to place the straight catheter without flange in the clamping block, and after positioning it with the positioning rod on the base, the upper die is used to punch to form the flange at the other end. After such processing, the I-shaped sleeve is easy to fit tightly on the clamping block, and the processed I-shaped sleeve is not easy to remove. Summary of the invention

[0004] In view of the problem in the prior art that the I-shaped sleeve is difficult to remove after being punched, the purpose of the present invention is to provide an I-shaped sleeve cold forming device, which has the advantage of facilitating the removal of the completed I-shaped sleeve.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An I-shaped sleeve cold forming device comprises a base, a push rod is elastically and telescopically arranged on the base, and a sink groove is provided at the upper end of the push rod for facilitating cold forging of the end of the I-shaped sleeve;

[0007] Slant guide blocks are arranged opposite to each other on both sides of the push rod, and the slant guide blocks are elastically telescopically arranged on the base, and the distance between the inclined surfaces of the two slant guide blocks gradually decreases in the direction close to the push rod, and the inclined surfaces of the slant guide blocks are slidably connected with clamping half blocks, and clamping holes are opened on the opposite surfaces of the two clamping half blocks;

[0008] A punching die is provided above the two inclined guide blocks for lifting and lowering, and a punching rod is detachably connected to the punching die, and the punching rod is coaxially arranged with the clamping hole.

[0009] By adopting the above technical scheme, when in use, first insert the straight tube without flange onto the punch rod, and place the end with the folded edge upwards, and use the static friction between the inner wall of the straight tube and the side wall of the punch rod to achieve the installation of the straight tube on the punch rod; then the punch die presses downward to drive the punch rod and the straight tube to be inserted between the two clamping holes, and at the same time, the punch die presses down the clamping half block, and the two clamping half blocks slide down along the inclined surface of the inclined guide block while approaching each other to clamp the side wall of the straight tube; then the punch rod continues to press downward, and the clamping half block can no longer move relative to the inclined guide block, and moves downward together with the inclined guide block, and cooperates with the sink groove on the push rod, and the other end of the straight tube is cold-forged to form a flange, so that the I-shaped sleeve processing is completed;

[0010] Then the punching die rises, and the push rod pushes the clamping half block to move upward. The clamping half blocks separate from each other during the process of moving upward. Finally, the punching die takes out the processed I-shaped sleeve by utilizing the static friction between the side wall of the punching die and the inner wall of the I-shaped sleeve, and pulls the I-shaped sleeve off the punching die. The present invention adopts the principle of opening and closing the die to perform auxiliary processing on the I-shaped sleeve, effectively avoiding the problem that the I-shaped sleeve is clamped on the clamping block and is difficult to remove after the stamping process is completed, which is convenient for improving production efficiency and reducing the physical labor of workers.

[0011] In a preferred example, the present invention can be further configured as follows: the clamping half block is slidably connected to the inclined surface of the inclined guide block through a slider rail structure.

[0012] By adopting the above technical solution, the sliding connection of the clamping half block on the inclined guide block is achieved.

[0013] In a preferred example, the present invention can be further configured as follows: the top rod includes an elastic rod elastically arranged on the base, a module is fixed to one end of the elastic rod, and the sink groove is formed between the module and the elastic rod.

[0014] By adopting the above technical solution, after the module is completely received in the sink, it contacts the bottom surface of the sink, and the position of the elastic rod cannot be changed, so it is convenient to use the sink to straighten the cold heading of the sleeve end.

[0015] In a preferred example, the present invention can be further configured as follows: a positioning hole for plugging and cooperating with the punch rod is provided at the bottom of the sink.

[0016] By adopting the above technical solution, during the cold forging process, the punch is inserted into the positioning hole, which is conducive to the coaxiality of the I-shaped sleeve part and the sink groove, thereby improving the cold forging dimensional accuracy of the product.

[0017] In a preferred example, the present invention can be further configured as follows: an end block is fixed to one end of the elastic rod away from the module, and a tension spring is fixed between the end block and the base.

[0018] By adopting the above technical solution, the elastic setting of the top rod can be achieved.

[0019] In a preferred example, the present invention can be further configured as follows: a receiving groove matching with the module is provided on the base;

[0020] When the module is completely pressed into the receiving groove, the upper end surface of the module is parallel to the upper end surface of the base.

[0021] The adoption of the technical solution is beneficial to improving the quality of the cold heading forming of the I-shaped sleeve flanging.

[0022] In a preferred example, the present invention can be further configured as follows: an outer mold is fixed outside the base, and a flange is provided at the upper opening of the outer mold;

[0023] In a natural state, the upper end surface of the inclined guide block abuts against the inner wall of the flange.

[0024] By adopting the above technical solution, the structural stability of the whole device in the idle state can be achieved; on the other hand, it can ensure that the inclined guide block will not be driven to slide down during the process of the clamping half block sliding down relative to the inclined guide block.

[0025] In a preferred example, the present invention can be further configured as follows: a limit bar is fixed to the upper end of the inclined guide block to prevent the clamping half block from slipping.

[0026] By adopting the above technical solution, the half block can be prevented from slipping.

[0027] In a preferred example, the present invention can be further configured as follows: a sliding rod is slidably connected between the outer mold and the base, one end of the sliding rod is fixed to the inclined guide block, and the other end is top-connected with a compression spring, and the compression spring is arranged in the outer mold.

[0028] By adopting the above technical solution, the elastic setting of the inclined guide block is achieved.

[0029] In summary, the present invention includes at least one of the following beneficial technical effects:

[0030] (1) The present invention adopts the principle of opening and closing molds to perform auxiliary processing on the I-shaped sleeve, which effectively avoids the problem that the I-shaped sleeve is clamped on the clamping block and is difficult to remove after the stamping process is completed, thereby facilitating the improvement of production efficiency and reducing the physical labor of workers;

[0031] (2) The opening and closing movement of the half-block in the present invention utilizes the resetting performance of the spring, and the I-shaped sleeve is convenient for production and processing without adding new driving force, thereby reducing processing energy consumption;

[0032] (3) Furthermore, during the cold heading process, the punch rod is coaxially inserted into the positioning hole to realize the cold heading flanging while also realizing the correction of the punch die position, thereby improving the cold heading dimensional accuracy of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the processing technology of the I-shaped sleeve in the prior art;

[0034] Figure 2 It is a schematic diagram of the overall structure of this embodiment;

[0035] Figure 3 It is a schematic diagram of the structure in three states during use of this embodiment.

[0036] In the figure: 1. base; 3. sink groove; 4. inclined guide block; 5. clamping half block; 6. clamping hole; 7. punching die; 8. punching rod; 9. elastic rod; 10. module; 11. I-shaped sleeve; 12. positioning hole; 13. end block; 14. tension spring; 15. receiving groove; 16. outer mold; 17. flange; 18. limit strip; 19. slide rod; 20. compression spring. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0038] Reference Figure 2 , which is an I-shaped sleeve cold forming device disclosed in the present invention, comprises a base 1, a push rod is elastically and telescopically arranged on the base 1, and a sink 3 is opened on the upper end of the push rod to facilitate the cold forging of the end of the I-shaped sleeve 11; inclined guide blocks 4 are arranged on both sides of the push rod, and the inclined guide blocks 4 are elastically and telescopically arranged on the base 1. The distance between the inclined surfaces of the two inclined guide blocks 4 gradually decreases in the direction close to the push rod. A holding half block 5 is slidably connected on the inclined surface of the inclined guide block 4 along the inclined direction of the inclined surface, and the end of the inclined guide block 4 is parallel to the inclination of its inclined surface. A slide rail is fixed in the direction, and a slider is slidably connected to the slide rail. The slider is fixedly connected to the clamping half block 5. Clamping holes 6 are opened on the opposite surfaces of the two clamping half blocks 5. The clamping holes 6 are semicircular holes. The two clamping half blocks 5 slide down along the inclined surface of the inclined guide block 4 and approach each other. The two clamping holes 6 form a circular hole for clamping the I-shaped sleeve 11, which is convenient for subsequent cold heading operation to form a flanging 17. A punching die 7 is set for lifting above the two inclined guide blocks 4. A punching rod 8 is detachably connected to the punching die 7, and the punching rod 8 is coaxially arranged with the clamping hole 6.

[0039] Reference Figure 2 and Figure 3 When in use, first insert the straight tube without the flange 17 onto the punch rod 8, and place the end with the folded edge upwards, and use the static friction between the inner wall of the straight tube and the side wall of the punch rod 8 to achieve the installation of the straight tube on the punch rod 8; then the die 7 presses downward to drive the punch rod 8 and the straight tube to be inserted between the two clamping holes 6. At the same time, the die 7 presses down the clamping half block 5, and the two clamping half blocks 5 approach each other while sliding down the inclined surface of the inclined guide block 4, clamping the side wall of the straight tube. When the clamping half block 5 slides down to the lowest side of the inclined surface, it is Figure 2 Schematic diagram of the second state; then the punch 8 continues to press down, holding the half block 5 relative to the inclined guide block 4 can no longer move, and can only move downward with the inclined guide block 4, cooperate with the sink groove 3 on the ejector rod, and the other end of the straight conduit is cold-forged to form a flange 17, so far, the I-shaped sleeve 11 is processed;

[0040] Next is the step of taking out the I-shaped sleeve 11: the punch 7 rises, the push rod pushes the holding half block 5 to move upward, and the holding half blocks 5 separate from each other during the upward movement. Finally, the punch 8 takes out the processed I-shaped sleeve 11 by utilizing the static friction between the side wall of the punch 8 and the inner wall of the I-shaped sleeve 11, and the I-shaped sleeve 11 is pulled off the punch 8. The present invention adopts the principle of opening and closing the mold to perform auxiliary processing on the I-shaped sleeve 11, effectively avoiding the problem that the I-shaped sleeve 11 is clamped on the clamping block and difficult to remove after the stamping process is completed, which is convenient for improving production efficiency and reducing the physical labor of workers.

[0041] The push rod includes an elastic rod 9 elastically arranged on the base 1, a module 10 is fixed at one end of the elastic rod 9, and the module 10 and the elastic rod 9 are arranged at different heights to form a sink 3, and a positioning hole 12 coaxially provided at the bottom of the sink 3 for plugging with the punch 8. During the cold heading process, the punch 8 is inserted into the positioning hole 12, which is conducive to the coaxiality of the I-shaped sleeve 11 part and the sink 3, thereby improving the cold heading dimensional accuracy of the product.

[0042] The end of the elastic rod 9 away from the module 10 is fixed with an end block 13, and a tension spring 14 is fixed between the end block 13 and the base 1. The end of the base 1 close to the end block 13 is provided with a countersunk hole, and the two ends of the tension spring 14 are respectively fixed in the countersunk hole and on the end block 13 to realize the elastic setting of the top rod. The base 1 is provided with a receiving groove 15 for the module 10; when the module 10 is completely pressed in the receiving groove 15, the upper end surface of the module 10 is parallel to the upper end surface of the base 1. When in use, the process of holding the half block 5 and driving the inclined guide block 4 to press down together is the process of cold heading the end of the I-shaped sleeve 11. The cold heading operation requires a large bearing force, and cold heading cannot be achieved by relying on the elastic force of the tension spring 14. Even if it can be achieved, the quality of the processed product is difficult to guarantee due to the instability of the elastic force. By setting the module 10 and the accommodating groove 15, during the cold heading operation, the module 10 shrinks into the accommodating groove 15, and relies on the contact with the bottom of the accommodating groove 15 to prevent the position of the elastic rod 9 from moving downward, thereby realizing cold heading production.

[0043] An outer mold 16 is fixed to the outside of the base 1, and a flange 17 is provided at the upper opening of the outer mold 16. In a natural state, the upper end surface of the inclined guide block 4 abuts against the inner wall of the flange 17. On the one hand, the stability of the structure of the entire device in an idle state can be achieved; on the other hand, it ensures that the inclined guide block 4 will not slide down when the holding half block 5 slides down relative to the inclined guide block 4; a limit strip 18 is fixed to the upper end of the inclined guide block 4 to prevent the holding half block 5 from slipping off.

[0044] A slide rod 19 is slidably connected between the outer mold 16 and the base 1 , one end of the slide rod 19 is fixed to the inclined guide block 4 , and the other end is connected to a compression spring 20 . The compression spring 20 is arranged in the outer mold 16 , wherein the elastic coefficient of the compression spring 20 is greater than the elastic coefficient of the tension spring 14 .

[0045] In summary:

[0046] When the present invention is used, the present invention adopts the principle of opening and closing molds to perform auxiliary processing on the I-shaped sleeve 11, effectively avoiding the problem that the I-shaped sleeve 11 is clamped on the clamping block and is difficult to remove after the stamping process is completed, which is convenient for improving production efficiency and reducing the physical labor of workers; the opening and closing movement of the clamping half block 5 in the present invention utilizes the reset performance of the spring, and the I-shaped sleeve 11 does not add new driving force while realizing convenient production and processing, thereby reducing processing energy consumption; during the cold forging process, the punch 8 is coaxially inserted into the positioning hole 12, which is used to realize the cold forging flanging 17 while also realizing the correction of the position of the punch die 7, thereby improving the cold forging dimensional accuracy of the product.

[0047] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An I-shaped sleeve cold forming device, characterized in that: It comprises a base (1), on which a push rod is elastically and telescopically arranged, and the upper end of the push rod is provided with a sink groove (3) for facilitating cold forging of the end of the I-shaped sleeve; Inclined guide blocks (4) are arranged opposite to each other on both sides of the push rod. The inclined guide blocks (4) are elastically telescopically arranged on the base (1). The distance between the inclined surfaces of the two inclined guide blocks (4) gradually decreases in the direction approaching the push rod. The inclined surfaces of the inclined guide blocks (4) are slidably connected with clamping half blocks (5). Clamping holes (6) are provided on the opposite surfaces of the two clamping half blocks (5). A punching die (7) is provided above the two inclined guide blocks (4) for lifting, and a punching rod (8) is detachably connected to the punching die (7), and the punching rod (8) is coaxially arranged with the clamping hole (6); When in use, the straight tube is inserted into the punch rod (8), and the end with the folded edge is placed upwards; the punch die (7) punches downwards, driving the punch rod (8) and the straight tube to be inserted between the clamping hole (6), and at the same time, the punch die (7) presses down the clamping half block (5), and the clamping half blocks (5) move closer to each other while sliding down along the inclined surface of the inclined guide block (4), clamping the side wall of the straight tube; the punch rod (8) continues to press downwards, the clamping half block (5) does not move relative to the inclined guide block (4) and moves downward with the inclined guide block (4), and cooperates with the sink groove (3) on the push rod, and the other end of the straight tube is cold-forged to form a flange (17); the punch die (7) rises, and the push rod pushes the clamping half block (5) to move upward, and the clamping half blocks (5) separate from each other during the upward movement; The clamping half block (5) is slidably connected to the inclined surface of the inclined guide block (4) through a slider rail structure; the top rod comprises an elastic rod (9) elastically arranged on the base (1), a module (10) is fixed to one end of the elastic rod (9), and the sink groove (3) is formed between the module (10) and the elastic rod (9); An outer mold (16) is fixed outside the base (1), and a flange (17) is provided at the upper opening of the outer mold (16); in a natural state, the upper end surface of the inclined guide block (4) abuts against the inner wall of the flange (17); A sliding rod (19) is slidably connected between the outer mold (16) and the base (1), one end of the sliding rod (19) is fixed to the inclined guide block (4), and the other end is top-connected with a compression spring (20), and the compression spring (20) is arranged in the outer mold (16).

2. The I-shaped sleeve cold forming device according to claim 1, characterized in that: The bottom of the sink (3) is provided with a positioning hole (12) for plugging and cooperating with the punch rod (8).

3. The I-shaped sleeve cold forming device according to claim 2, characterized in that: An end block (13) is fixed to one end of the elastic rod (9) away from the module (10), and a tension spring (14) is fixed between the end block (13) and the base (1).

4. The I-shaped sleeve cold forming device according to claim 1, characterized in that: The base (1) is provided with a receiving groove (15) that matches the module (10); When the module (10) is completely pressed into the accommodating groove (15), the upper end surface of the module (10) is parallel to the upper end surface of the base (1).

5. The I-shaped sleeve cold forming device according to claim 1, characterized in that: A limiting strip (18) is fixed to the upper end of the inclined guide block (4) to prevent the clamping half block (5) from slipping off.

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