An interchangeable, correctable, and gas shieldable piercing die for extruding seamless pipe

Abstract

The utility model relates to be applicable to non ferrous metal processing field discloses a kind of interchangeable perforating die for extruding seamless pipe, gas protection can be vented, including die body, the right side of the die body is fixedly connected with extruding cylinder, the inside of the die body is installed with perforating head, the inside of the extruding cylinder is installed with perforating needle support, the inside of the perforating needle support is detachably installed with perforating needle body, the inside of the perforating head is provided with reserved through slot.This interchangeable perforating die for extruding seamless pipe, gas protection can be vented, design into three pieces of conical split structure from thick to thin, while guaranteeing the strength of perforating needle body, it is favorable to the adjustment of the eccentricity of the wall thickness size of seamless pipe, it is favorable to the universality and interchangeability of routine perforating needle, the transmission of low-temperature nitrogen gas from tail to head is favorable to the improvement of pipe inner surface quality, and the design method of perforating die for gas protection is novel, solve the problem of inconvenient adjustment pipe wall thickness.

Description

Technical Field

[0001] This utility model relates to the field of non-ferrous metal processing technology, specifically a perforation mold for extruding seamless tubes that is interchangeable, can correct deviations, and can be protected by gas. Background Technology

[0002] Currently, the internal surface quality of extruded seamless tubes, especially 2-series and 7-series seamless tubes, is poor, mainly manifested in defects such as burrs, skin tearing, and stringing in the inner hole, as well as severe wall thickness eccentricity. Existing countermeasures include frequent die changes and reducing extrusion temperature and speed, but these are only temporary solutions. The poor internal surface quality and severe wall thickness eccentricity of the extruded tubes significantly affect the yield, the difficulty of subsequent processing, and increase the probability of customer complaints. The dies for extruding seamless tubes have unique characteristics and are more complex than those for seamed tubes. There is an urgent need to develop a piercing die design suitable for mass production of seamless tubes that is interchangeable, capable of correcting deviations, and can be protected by inert gas to address the technical deficiencies mentioned above. Utility Model Content

[0003] The purpose of this invention is to provide a perforation mold for extruding seamless pipes that is interchangeable, can correct deviations, and can be protected by gas, so as to solve the problem of inconvenience in adjusting the pipe wall thickness mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a perforating mold for extruding seamless pipes that is interchangeable, corrective, and gas-protected, comprising a mold body, an extrusion cylinder fixedly connected to the right side of the mold body, a perforating head installed inside the mold body, a perforating needle support installed inside the extrusion cylinder, a perforating needle body detachably installed inside the perforating needle support, a reserved through groove provided inside the perforating head, an extrusion channel provided inside the perforating needle body, a pipe provided inside the extrusion channel, and an assembly groove provided on the left side inside the perforating needle body.

[0005] As a further technical solution of this utility model, the position of the countersunk hole of the piercing needle support head is provided and it is equipped with an M90mm connection method to assemble with the piercing needle body.

[0006] As a further technical solution of this utility model, the tail of the perforating needle support is fixedly connected to the extrusion cylinder using an M175mm connection method.

[0007] As a further technical solution of this utility model, the tail of the perforating head and the head of the perforating needle body are connected by an M45 connection.

[0008] As a further technical solution of this utility model, an extrusion pad is provided inside the extrusion cylinder, and the extrusion pad is disposed on the inner side of the perforating needle support.

[0009] As a further technical solution of this utility model, the inner hole of the perforating needle support is machined with a nitrogen gas passage hole with an outer diameter of 10mm, and is connected to an externally configured nitrogen gas pipeline using a ZG1 / 4 tapered pipe thread.

[0010] Compared with the prior art, the beneficial effects of this utility model are: the interchangeable, corrective and gas-protected perforating mold for extruding seamless pipes not only realizes the function of facilitating the adjustment of the pipe wall thickness eccentricity and the function of facilitating replacement, but also realizes the function of reducing the processing difficulty.

[0011] (1) By setting a perforation head, a reserved through groove, a perforation needle support and a perforation needle body, and by optimizing the mold structure design of the extrusion perforation needle for seamless pipe, the theoretical idea of ​​designing the solid perforation needle body as a hollow split type is creatively proposed. By designing it into three conical split structures from coarse to fine, while ensuring the strength of the perforation needle body, it is conducive to the adjustment of the wall thickness eccentricity of the seamless pipe, and also conducive to the versatility, interchangeability and maintainability of the daily perforation needle. The solid perforation needle body is designed as a hollow through hole, and the transmission of low temperature nitrogen from the tail to the head is conducive to the improvement of the inner surface quality of the pipe. The perforation mold design method with gas protection is novel.

[0012] (2) By setting up a perforation head, a perforation needle support and a perforation needle body, the perforation mold design method of the present invention is novel, interchangeable, corrective and gas-protected. It is easy for employees to operate, easy to adjust the eccentricity of seamless tubes, and has high production efficiency. It has targeted the improvement of the wall thickness accuracy and inner surface quality of seamless tubes and creatively proposed a split hollow structure, which has reduced the cost of production and improved the versatility and maintainability, and promoted the mass production of extruded seamless tube hard aluminum materials. Attached Figure Description

[0013] Figure 1 This is a frontal cross-sectional view of the present invention.

[0014] Figure 2 This is a front view cross-sectional structural diagram of the perforating needle of this utility model;

[0015] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0016] Figure 4 This is a frontal cross-sectional view of the perforation head of this utility model.

[0017] In the diagram: 1. Mold body; 2. Piercing head; 3. Reserved through slot; 4. Extrusion cylinder; 5. Piercing needle support; 6. Piercing needle body; 7. Pipe; 8. Extrusion pad; 9. Extrusion channel; 10. Assembly slot. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 An embodiment of this utility model is provided: a perforation mold for extruding seamless pipes that is interchangeable, can correct deviation, and can be gas-protected, including a mold body 1, an extrusion cylinder 4 fixedly connected to the right side of the mold body 1, a perforation head 2 installed inside the mold body 1, a perforation needle support 5 installed inside the extrusion cylinder 4, a perforation needle body 6 detachably installed inside the perforation needle support 5, a reserved through groove 3 provided inside the perforation head 2, an extrusion channel 9 provided inside the perforation needle body 6, a pipe 7 provided inside the extrusion channel 9, and an assembly groove 10 provided on the left side inside the perforation needle body 6;

[0020] The head of the piercing needle support 5 is machined with a countersunk hole and is equipped with an M90mm connection to assemble with the piercing needle body 6.

[0021] Specifically, such as Figure 1 and Figure 2 As shown, the outer diameter of the perforating needle support 5 is designed to be 180mm instead of the original 90mm. The length of this section is designed to be 2405mm. The tail of the perforating needle support 5 is fixed to the equipment using an M175mm connection. A countersunk hole is machined at the head of the perforating needle support 5 and equipped with an M90mm connection to assemble it with the perforating needle body 6. A nitrogen inlet with an outer diameter of 10mm is machined in the inner hole of the perforating needle support 5, and it is connected to the externally configured nitrogen pipeline using a ZG1 / 4 tapered pipe thread. This is the low-temperature nitrogen inlet.

[0022] The tail of the piercing needle support 5 is fixedly connected to the extrusion cylinder 4 using an M175mm connection method, and the tail of the piercing head 2 is connected to the head of the piercing needle body 6 using an M45 connection method.

[0023] Specifically, such as Figure 1 and Figure 4 As shown, the outer diameter of the main body 6 of the perforating needle remains the same as the original 90mm outer diameter. The total length of this section is designed to be 815mm. The tail of the main body 6 of the perforating needle is connected and fixed to the head of the perforating needle support 5 using an M90. The middle through hole Φ10mm serves as the ventilation and transmission channel for the intermediate low-temperature nitrogen. The head of the main body 6 of the perforating needle is machined into an M45 countersunk hole to facilitate subsequent connection with the perforating head 2.

[0024] The extrusion cylinder 4 is equipped with an extrusion pad 8, which is located inside the piercing needle support 5. The piercing needle support 5 has a nitrogen passage hole with an outer diameter of 10mm, and is connected to the external nitrogen pipeline using a ZG1 / 4 tapered pipe thread.

[0025] Specifically, such as Figure 1 and Figure 3 As shown, the piercing head 2 is designed with a conical tip structure, which facilitates online piercing during online extrusion. The length of this section is designed to be 116mm. The tail of the piercing head 2 is connected to the head of the piercing needle body 6 using an M45 connection. The head of the piercing head 2 is designed with an inner diameter of Φ30mm, which is the inner diameter of the tube. The working band at the head of the piercing head 2 is Φ30mm. The transition part with the working band adopts a 120° conical design, which can effectively perform axial positioning. The through hole in the middle is designed with a diameter of Φ12mm as an output channel for low-temperature nitrogen gas. Nitrogen gas can be directly applied to the inner wall of the extruded seamless tube. The extrusion is accompanied by the protection of low-temperature nitrogen inert gas, which can well ensure the quality of the inner wall of the tube.

[0026] Working Principle: The piercing needle support 5 has a 10mm outer diameter nitrogen inlet hole machined inside, and connects to the externally configured nitrogen pipeline using a ZG1 / 4 tapered pipe thread. The transition section with the working zone adopts a 120° conical design for effective axial positioning. The central through hole is designed with a Φ12mm size as a low-temperature nitrogen output channel, allowing nitrogen to be directly applied to the inner wall of the extruded seamless pipe. The extrusion process is accompanied by the protection of low-temperature nitrogen inert gas, which effectively ensures the quality of the pipe's inner wall. This optimization of the extrusion process for seamless pipes... The mold structure design of the perforation needle creatively proposes the theoretical concept of designing the solid perforation needle body 6 as a hollow split type. By designing it into three tapered split structures from coarse to fine, it not only ensures the strength of the perforation needle body 6, but also facilitates the adjustment of the eccentricity of the seamless pipe wall thickness. It also improves the versatility, interchangeability, and maintainability of the perforation needle in daily use. Designing the solid perforation needle body 6 as a hollow through-hole shape allows for the transmission of low-temperature nitrogen gas from the tail to the head, which is beneficial to improving the quality of the inner surface of the pipe. The perforation mold design method with gas protection is novel.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A perforating die for extruding seamless pipes that is interchangeable, corrective, and gas-protected, comprising a die body (1), characterized in that: An extrusion cylinder (4) is fixedly connected to the right side of the mold body (1). A perforating head (2) is installed inside the mold body (1). A perforating needle support (5) is installed inside the extrusion cylinder (4). A perforating needle body (6) is detachably installed inside the perforating needle support (5). A reserved through groove (3) is provided inside the perforating head (2). An extrusion channel (9) is provided inside the perforating needle body (6). A pipe (7) is provided inside the extrusion channel (9). An assembly groove (10) is provided on the left side inside the perforating needle body (6).

2. The piercing die for extruding seamless tubes, which is interchangeable, can correct deviations, and is protected by gas, as described in claim 1, is characterized in that: The head of the perforating needle support (5) is machined with a countersunk hole and is equipped with an M90mm connection to be assembled with the perforating needle body (6).

3. The piercing die for extruding seamless tubes, which is interchangeable, can correct deviations, and is protected by gas, as described in claim 1, is characterized in that: The end of the perforating needle support (5) is fixedly connected to the extrusion cylinder (4) using an M175mm connection method.

4. A perforating die for extruding seamless tubes that is interchangeable, corrective, and gas-protected, as described in claim 1, characterized in that: The tail of the perforating head (2) is connected to the head of the perforating needle body (6) using an M45 connection method.

5. A perforating die for extruding seamless tubes that is interchangeable, corrective, and gas-protected, as described in claim 1, characterized in that: The extrusion cylinder (4) is provided with an extrusion pad (8) inside, and the extrusion pad (8) is located on the inner side of the perforation needle support (5).

6. A perforating die for extruding seamless tubes that is interchangeable, corrective, and gas-protected, as described in claim 1, characterized in that: The inner hole of the perforated needle support (5) is machined with a nitrogen passage hole with an outer diameter of 10mm, and is connected to the externally configured nitrogen pipeline using a ZG1 / 4 tapered pipe thread.

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