Casing pipe stamping die structure

Abstract

The utility model relates to the field of stamping dies, and discloses a sleeve stamping die structure which comprises an upper die structure and a lower die structure which are arranged up and down, the stamping die structure is installed on a punch press, the upper die structure comprises an upper die block and a stamping die fixed at the bottom of the upper die block, and the upper die block drives the stamping die to move up and down under the action of a power device; the lower die structure comprises a lower die base and a lower die block fixed to the lower die base, a lower die cavity is formed in the lower die block, the shape of the lower die cavity is matched with the circumferential direction of the machining sleeve, and the machining sleeve penetrates through the lower die cavity and is connected with an elastic supporting piece in the lower die base. The lower die cavity is located under the stamping die, and the stamping die moves downwards to conduct stamping forming on a pipe opening of the machining sleeve in the lower die cavity. The mold has the beneficial effects that the demolding is easy, the forming precision is improved, the processing cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of stamping dies, in particular to a sleeve stamping die structure. Background Art

[0002] A sleeve stamping die is a special process equipment used to process metal or non-metallic pipe fittings into the desired shape and size. It is a type of stamping die, and is mainly used to apply pressure to the sleeve to cause it to separate or plastically deform, thereby obtaining the desired workpiece. The working principle of the sleeve stamping die is to use a die installed on a press to apply pressure to the pipe mouth of the sleeve at room temperature to stamp it into shape, thereby obtaining a finished product of the desired shape and size. However, when the existing sleeve stamping die is used to stamp the sleeve, the sleeve will deform and its own height will be reduced, making it difficult to demold from the mold cavity where the sleeve is installed, resulting in low production efficiency and high processing time cost. In addition, during the stamping process, the upper mold structure and the lower mold structure are prone to misalignment, resulting in poor molding accuracy. Utility Model Content

[0003] In order to overcome the problems of difficulty in demoulding, low production efficiency and poor forming accuracy when stamping the tube mouth of the sleeve in the above-mentioned background technology, the utility model provides a sleeve die structure, by arranging an elastic support member under the lower mold cavity where the processing sleeve is installed, so that the processing sleeve can be pushed out by the elastic support member after the processing is completed, which is convenient for demoulding, and the positioning function is realized by arranging matching positioning pins and positioning holes to avoid displacement during the processing process, which has the beneficial effects of easy demoulding, improved forming accuracy, reduced processing costs and improved production efficiency.

[0004] The technical solution of the utility model is as follows:

[0005] A sleeve die structure includes an upper die structure and a lower die structure arranged up and down, and the die structure is installed on a punching machine. The upper die structure includes an upper module and a die mold fixed to the bottom of the upper module. The upper module drives the die mold to move up and down under the action of a power device; the lower die structure includes a lower die base and a lower module fixed on the lower die base, and a lower model cavity is opened in the lower module. The shape of the lower model cavity matches the circumference of the processing sleeve. The processing sleeve passes through the lower model cavity and is connected to the elastic support member in the lower die base; the lower model cavity is located directly below the die mold, and the die mold moves downward to punch and form the pipe mouth of the processing sleeve in the lower model cavity.

[0006] Preferably, a positioning pin fixed in the upper module is provided on one side of the punch die. The positioning pin extends vertically downward and is inserted into the positioning hole of the lower module to be connected therewith when descending.

[0007] Preferably, the upper module is fixedly connected to the movable crossbeam of the punch press via an upper fixed plate, the die mold is installed in the die base, and bolts pass through the die base, the upper module and the upper fixed plate for fixed connection.

[0008] Preferably, the lower module and the lower die base are fixedly connected by a plurality of hexagon socket bolts, which extend upward from the bottom of the lower die base into the lower module and are evenly arranged around the circumference of the lower mold cavity; the lower die base is fixedly connected to the punch base through a lower fixing plate.

[0009] Preferably, an installation cavity communicating with the lower model cavity is opened in the lower mold base, and an elastic support member is arranged in the installation cavity. The elastic support member includes a vertically arranged lower mold top block and a spring sleeved on the circumference of the lower mold top block, and the top of the lower mold top block is connected to the bottom of the processing sleeve.

[0010] Further preferably, the lower mold top block includes an upper top block, a connecting block and a lower top block that are integrally connected. The upper top block passes upward through the installation cavity and is located below the lower mold cavity. The top and bottom surfaces of the connecting block are respectively abutted against the top wall of the installation cavity and the top surface of the spring, and the lower top block extends into the spring.

[0011] Further preferably, the length of the spring is greater than the length of the lower top block.

[0012] Further preferably, the wire diameter of the spring is in the range of 2.7-3.0 mm, and the outer diameter is in the range of 27-32 mm.

[0013] Preferably, it also includes a pressing plate, which is horizontally arranged on one side of the lower mold base, with one end pressed on the surface of the lower mold base and fixedly connected to the lower fixed plate through a vertically arranged connecting column.

[0014] Further preferably, the upper and lower ends of the connecting column are fixedly connected to the pressing plate and the lower fixing plate respectively by means of threaded connections.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] (1) Since an elastic support member is provided below the lower mold cavity where the processing sleeve is installed, and the bottom of the processing sleeve is connected to the elastic support member, when the nozzle at the top of the processing sleeve is punched, the elastic support member will be compressed and exert an elastic buffering force on the bottom of the processing sleeve, thereby preventing the bottom of the processing sleeve from being deformed due to excessive punching pressure at the top of the sleeve, thereby affecting the shape of the finished product;

[0017] (2) By providing an elastic support member, the top of the processed sleeve can be pushed out of the lower mold cavity after the stamping is completed, which makes it easier to demould and improve production efficiency;

[0018] (3) By setting a positioning pin in the upper die structure and cooperating with the positioning hole in the lower die structure, the upper die block and the lower die block can be positioned to prevent the two from being laterally misaligned during the processing process, causing the die to shift and unable to process the pipe mouth of the processing sleeve normally, thereby improving the finished product rate of the processing sleeve and ensuring the dimensional accuracy of the processing sleeve;

[0019] (4) This die structure is installed on a punching machine. Compared with the production using special equipment, it not only saves the cost of purchasing special equipment, but also greatly improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be described with reference to the accompanying drawings, in which:

[0021] Figure 1 This is a schematic diagram of the overall structure of the utility model before processing;

[0022] Figure 2 It is a schematic diagram of the overall structure of the utility model during processing;

[0023] Figure 3 This is a schematic structural diagram of the lower die top block of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the sleeve after processing of the utility model is completed.

[0025] Figure numerals: upper mold structure 1, upper module block 11, die mold 12, positioning pin 13, upper fixed plate 14, movable crossbeam 15, die base 16, lower mold structure 2, lower mold base 21, lower module block 22, lower model cavity 23, positioning hole 24, lower fixed plate 25, punch base 26, mounting cavity 27, lower mold top block 3, upper top block 31, connecting block 32, lower top block 33, spring 34, connecting channel 35, pressure plate 4, connecting column 41, processing sleeve 5. DETAILED DESCRIPTION

[0026] Example 1: Figures 1 to 4The illustrated embodiment of a sleeve die structure comprises an upper die structure 1 and a lower die structure 2 arranged vertically. The die structure in this embodiment is mounted on a punch press, which can be powered by a hydraulic system, servo motor, or other power source. The upper die structure 1 includes an upper module 11 and a die mold 12 fixed to the bottom of the upper module 11. The structure and size of the die mold 12 are compatible with the shape and size of the nozzle of the sleeve 5 to be processed. The upper module 11, driven by the power source, drives the die mold 12 up and down. The lower mold structure 2 includes a lower mold base 21 and a lower module 22 fixed above the lower mold base 21. A lower mold cavity 23 for installing the processing sleeve 5 is opened in the lower module 22. The shape of the lower mold cavity 23 is matched with the circumference of the processing sleeve 5. The processing sleeve 5 extends downward into the lower mold cavity 23 and maintains a stable connection with it. The bottom surface of the processing sleeve 5 passes through the lower mold cavity 23 and is connected to the elastic support member in the lower mold base 21. The lower mold cavity 23 is located directly below the die mold 12. The die mold 12 moves downward to punch and form the pipe mouth of the processing sleeve 5 in the lower mold cavity 23.

[0027] When the processing sleeve 5 is stamped, the power device is started, and the power device drives the upper mold structure 1 to move downward as a whole, and the punch die 12 moves downward to connect with the pipe mouth at the top of the processing sleeve 5. The punch die 12 continues to move downward, pressing down to widen the pipe mouth so that the pipe mouth of the processing sleeve 5 is stamped and formed. At the same time, the bottom of the processing sleeve 5 will exert pressure on the elastic support member to compress it; after the stamping process is completed, the power device drives the upper mold structure 1 to move upward and reset as a whole, and at the same time, the elastic support member stretches and resets and pushes the processing sleeve 5 upward to facilitate demoulding.

[0028] Since an elastic support is provided below the lower mold cavity 23 where the processing sleeve 5 is installed, and the bottom of the processing sleeve 5 is connected to the elastic support, when the nozzle at the top of the processing sleeve 5 is punched, the elastic support will compress and apply an elastic buffering force to the bottom of the processing sleeve 5, which can prevent the bottom of the processing sleeve 5 from being deformed due to excessive punching pressure at the top of the gas, thereby affecting the shape of the finished product; at the same time, the provision of the elastic support can also facilitate demoulding by pushing the top of the processing sleeve 5 out of the lower mold cavity 23 after the punching is completed, thereby improving production efficiency. In addition, the present die structure is installed on a punching machine, which not only saves the cost of purchasing special equipment, but also greatly improves production efficiency compared to the use of special equipment.

[0029] Example 2: An optimal design is made based on Example 1. A positioning pin 13 is provided on one side of the die mold 12 and is fixed in the upper module 11. The positioning pin 13 extends vertically downward. A positioning hole 24 is provided in the lower module 22 just below the positioning pin 13. When the upper mold structure 1 moves downward, the positioning pin 13 is inserted into the positioning hole 24 in the lower module 22 and is connected with it. By setting the positioning pin 13 in the upper mold structure 1 and the positioning hole 24 in the lower mold structure 2, the upper module 11 and the lower module 22 can be positioned to prevent the two from being laterally misaligned during the processing process, causing the die mold 12 to shift and unable to normally process the pipe mouth of the processing sleeve 5, thereby improving the finished product rate of the processing sleeve 5 and also ensuring the dimensional accuracy of the processing sleeve 5.

[0030] Example 3: Based on Example 1, the fixing method of the upper mold structure 1 is optimally designed. The upper module 11 is connected to the movable crossbeam 15 of the punch press through the upper fixed plate 14. The upper fixed plate 14 and the movable crossbeam 15 are fixed by threaded connection. The movable crossbeam 15 is connected to the power device. The power device drives the upper mold structure 1 to move up and down through the movable crossbeam 15. The die mold 12 is installed in the die base 16 by threaded connection. This detachable connection method makes it easier to replace the die mold 12 when the processing shape or size of the processing sleeve 5 needs to be changed, and saves material costs. Bolts pass through the die base 16, the upper module 11 and the upper fixed plate 14 to fix the three together, while maintaining the overall stability of the upper mold structure 1.

[0031] Example 4: Based on Example 1, the fixing method of the lower mold structure 2 is preferably designed, and the lower module 22 and the lower mold base 21 are fixedly connected by a number of hexagon socket bolts. Each hexagon socket bolt passes through the bottom of the lower mold base 21 and extends into the lower module 22. The tops of all hexagon socket bolts extend into the lower module 22 and are evenly arranged around the lower model cavity 23. This connection method can ensure the connection stability of the lower module 22 and the lower mold base 21.

[0032] Furthermore, the lower die base 21 is fixed to the punch base 26 via a lower fixing plate 25 , and the upper and lower surfaces of the lower fixing plate 25 can be fixedly connected to the lower die base 21 and the punch base 26 respectively by threaded connection.

[0033] Example 5: Based on Example 1, the elastic support is optimally designed. A mounting cavity 27 communicating with the lower mold cavity 23 is provided in the lower mold base 21. The elastic support is arranged in the mounting cavity 27. The elastic support includes a vertically arranged lower mold top block 3 and a spring 34 sleeved on the circumference of the lower mold top block 3. The top of the lower mold top block 3 is connected to the bottom of the processing sleeve 5. Specifically, Figure 3As shown, the lower mold top block 3 includes an upper top block 31, a connecting block 32 and a lower top block 33 that are integrally connected. The upper top block 31 passes through the installation cavity 27 upward and is located below the lower model cavity 23, wherein the bottom of the lower module 22 below the lower model cavity 23 and the top of the lower mold base 21 above the installation cavity 27 are each provided with a groove, and the two grooves together constitute a connecting channel 35 connecting the lower model cavity 23 and the installation cavity 27, and the upper top block 31 is located in the connecting channel 35; the top surface and bottom surface of the connecting block 32 are respectively in contact with the top wall of the cavity of the installation cavity 27 (that is, the circumferential inner wall of the bottom of the groove at the top of the above-mentioned lower mold base 21) and the top surface of the spring 34, and the lower top block 33 extends into the spring 34.

[0034] Furthermore, when the spring 34 is sleeved on the lower mold top block 3, the length of the spring 34 is greater than the length of the lower top block 33, so as to avoid the lower top block 33 being too long and the spring 34 being unable to be compressed.

[0035] Furthermore, the wire diameter range of the spring 34 is 2.7-3.0 mm, and the outer diameter range is 27-32 mm. Within this size range, during the stamping process, the spring 34 can always maintain good elastic force, and after the processing is completed, the spring 34 can quickly reset to push the processing sleeve 5 out of the lower mold cavity 23.

[0036] During use, the processing sleeve 5 is inserted into the lower mold cavity 23 and its bottom surface is kept in contact with the surface of the upper top block 31. At the same time, the connecting block 32 of the lower mold top block 3 abuts against the top wall of the lower mold cavity 23 under the action of the spring 34. When the stamping process is performed, the processing sleeve 5 presses the lower mold top block 3 downward, the spring 34 is compressed, and an elastic buffering force is applied to the processing sleeve 5. After the processing is completed, the spring 34 extends and drives the lower mold top block 3 to move upward and reset. By providing this elastic structure, the elastic support can not only maintain the stable support of the processing sleeve 5 by the elastic support member, but also protect the processing sleeve 5 during the stamping process to prevent it from deformation. After the processing is completed, the processing sleeve 5 is ejected from the lower mold cavity 23 for easy demoulding.

[0037] Example 6: Based on Example 1, a preferred design is made. This die structure also includes a pressing plate 4, which is horizontally arranged on one side of the lower die base 21. One end of the pressing plate 4 is pressed on the surface of the lower die base 21. The middle and the other end are fixedly connected to the lower fixed plate 25 via connecting columns 41. Specifically, two sections of connecting columns 41 vertically pass through the middle and the other end of the pressing plate 4 respectively. The bottom ends of the two are fixedly connected to the lower fixed plate 25 via external hexagonal bolts, and the top ends are fixedly connected to the pressing plate 4 via stud bolts. By providing the pressing plate 4, the lower die structure 2 can be pressed tightly, making it more stable during the stamping process and ensuring the quality of the finished product.

[0038] The above embodiments merely represent specific implementation methods of the present application. Although the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the present application. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the technical concept of the present application, and these modifications and improvements are all within the scope of protection of the present application.

Claims

1. A sleeve die structure, comprising an upper die structure (1) and a lower die structure (2) arranged in an upper and lower manner, characterized in that: The die structure is installed on a punching machine, wherein the upper die structure (1) comprises an upper module (11) and a die mold (12) fixed at the bottom of the upper module (11), and the upper module (11) drives the die mold (12) to move up and down under the action of a power device; the lower die structure (2) comprises a lower die base (21) and a lower module (22) fixed on the lower die base (21), and a lower mold cavity (23) is provided in the lower module (22), and the shape of the lower mold cavity (23) matches the circumference of the processing sleeve (5), and the processing sleeve (5) passes through the lower mold cavity (23) and is connected to the elastic support member in the lower die base (21); the lower mold cavity (23) is located directly below the die mold (12), and the die mold (12) moves downward to punch and form the tube mouth of the processing sleeve (5) in the lower mold cavity (23).

2. A sleeve die structure according to claim 1, characterized in that: One side of the punch die (12) is provided with a positioning pin (13) fixed in the upper module (11), and the positioning pin (13) extends vertically downward and is inserted into the positioning hole (24) of the lower module (22) when descending to cooperate with it.

3. The sleeve punching die structure according to claim 1, characterized in that: The upper module (11) is fixedly connected to the movable crossbeam (15) of the punch press via an upper fixed plate (14); the punch die (12) is installed in the punch die base (16); and bolts pass through the punch die base (16), the upper module (11) and the upper fixed plate (14) for fixed connection.

4. The sleeve punching die structure according to claim 1, characterized in that: The lower die block (22) and the lower die base (21) are fixedly connected by a plurality of hexagon socket bolts, which extend upward from the bottom of the lower die base (21) into the lower die block (22) and are evenly arranged around the lower mold cavity (23); the lower die base (21) is fixedly connected to the punch base (26) via a lower fixing plate (25).

5. The sleeve punching die structure according to claim 1, characterized in that: The lower die base (21) is provided with a mounting cavity (27) communicating with the lower mold cavity (23). An elastic support member is provided in the mounting cavity (27). The elastic support member comprises a vertically arranged lower die top block (3) and a spring (34) sleeved on the circumference of the lower die top block (3). The top of the lower die top block (3) is connected to the bottom of the processing sleeve (5).

6. The sleeve punching die structure according to claim 5, characterized in that: The lower mold top block (3) comprises an upper top block (31), a connecting block (32) and a lower top block (33) which are integrally connected. The upper top block (31) extends upwardly out of the mounting cavity (27) and is located below the lower mold cavity (23). The top surface and bottom surface of the connecting block (32) respectively abut against the cavity top wall of the mounting cavity (27) and the top surface of the spring (34). The lower top block (33) extends into the spring (34).

7. The sleeve punching die structure according to claim 6, characterized in that: The length of the spring (34) is greater than the length of the lower top block (33).

8. The sleeve punching die structure according to claim 5, characterized in that: The wire diameter of the spring (34) is in the range of 2.7-3.0 mm, and the outer diameter is in the range of 27-32 mm.

9. The sleeve punching die structure according to claim 1, characterized in that: It also includes a pressing plate (4), which is horizontally arranged on one side of the lower die base (21), one end of which is pressed on the surface of the lower die base (21) and fixedly connected to the lower fixed plate (25) via a vertically arranged connecting column (41).

10. The sleeve punching die structure according to claim 9, characterized in that: The upper and lower ends of the connecting column (41) are fixedly connected to the pressing plate (4) and the lower fixing plate (25) respectively by means of threaded connection.

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