Integrated forging forming die for special-shaped pipe

Abstract

The invention provides a special-shaped pipe integrated forging forming die for the special-shaped pipe, aims to solve the problem of difficulty in integrated forming of the special-shaped pipe, and relates to the technical field of forging forming. According to the integrated forging forming die for the special-shaped pipe, the forming die is provided with a forming cavity used for forming the appearance of a special-shaped pipe body, the part from the bottom face of the forming cavity to one end of the forming cavity to the other end of the forming cavity is obliquely arranged, and the top face of the forming cavity is horizontally arranged from one end of the forming cavity to the other end of the forming cavity. The end, used for forming the small thickness of the top wall of the special-shaped pipe body, of the forming cavity is a high end. One end, corresponding to the lower end of the forming cavity, of the upper part cavity is opened to form a notch; and the side wall of one end, corresponding to the lower end of the forming cavity, of the lower part cavity is provided with an extension part which is matched with the notch to seal the notch. According to the method, the forge piece is easier to integrally form, integral forming can be achieved, and the mechanical property of the special-shaped pipe is improved.

Description

Technical Field

[0001] This invention relates to the field of forging technology, and specifically to an integrated forging mold for irregularly shaped tubes. Background Technology

[0002] Shaped pipes are widely used in various industrial fields such as construction, petrochemicals, and aerospace. Their main function is to transport fluids of different properties, such as crude oil, chemical raw materials, gases, and wastewater. Traditional manufacturing of shaped pipes typically involves processes such as cutting, rolling, and welding to form the required shape and size. However, for shaped pipes used in special applications, such as complex working environments with high temperature, high pressure, or strong corrosiveness, this method suffers from weak weld structures, limiting their application in industrial fields. Therefore, integrated molding technology for shaped pipes is the current and future development trend.

[0003] like Figures 1 to 4 The illustrated irregularly shaped tube includes a tube body 1. The tube body 1 has a circular flow channel hole 11 extending linearly from one end to the other. The diameter of the circular flow channel hole 11 is consistent from one end to the other. The top wall of the tube body 1 gradually increases in thickness from one end to the other, and the side walls gradually increase in thickness from the thicker end to the thinner end of the top wall. The bottom wall has the same thickness from one end to the other. Due to its special structure, this forging is difficult to integrally form using conventional die forging methods. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an integrated forging mold for the above-mentioned irregular tubes, so as to solve the problem of difficulty in integrated molding.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an integrated forging mold for irregular tubes, wherein the irregular tube includes an irregular tube body, and the irregular tube body is provided with a circular flow channel hole extending in a straight line from one end of the irregular tube body to the other end. The diameter of the circular flow channel hole is the same from one end to the other end. The thickness of the top wall of the irregular tube body gradually increases from one end to the other end. The thickness of both side walls gradually increases from the end with the thicker top wall to the end with the thinner top wall. The thickness of the bottom wall is the same from one end to the other end.

[0006] The forming mold is provided with a forming cavity for forming the shape of the irregular tube body. The bottom surface of the forming cavity is inclined from one end to the other end. The top surface of the forming cavity is horizontal from one end to the other end. The end of the forming cavity used to form the irregular tube body with a smaller top wall thickness is the high end.

[0007] The forming die comprises an upper die, a lower die and a core rod for forming the circular runner hole, and the forming cavity is formed by cooperation of an upper part cavity arranged on the upper die and a lower part cavity arranged on the lower die;

[0008] The upper part cavity is arranged with an opening at one end corresponding to the lower end of the forming cavity to form a notch;

[0009] The side wall of one end of the lower part cavity corresponding to the lower end of the forming cavity is provided with an extension part matched with the notch to close the notch, and the two ends of the lower part cavity are respectively provided with core rod limiting platforms for limiting the downward stroke of the core rod.

[0010] Further, the side wall of one end of the lower part cavity corresponding to the lower end of the forming cavity is provided with a core rod guide groove extending downward and matched with one end of the core rod, and the side wall of one end of the upper part cavity corresponding to the upper end of the forming cavity is provided with a clamping groove extending downward and matched with the other end of the core rod in sliding mode.

[0011] Further, the core rod limiting platform is provided with a material storage groove.

[0012] Further, the upper part cavity and the lower part cavity are both provided with a draft angle of 7°-9°.

[0013] Further, the lower die is provided with a flash groove communicated with the forming cavity at the joint with the upper die.

[0014] The beneficial effects of the present application are that the special-shaped pipe integrated forging forming die can limit one end of the special-shaped pipe top wall thicker by using one side wall of the extension part 222 of the lower die to limit the blank 3 in the forming process, and the material of the blank 3 side wall located at the thicker end of the special-shaped pipe top wall of the forming cavity 24 can be moved to the other end of the blank in the forming process, which is also beneficial to the flow of the material at the top of the blank to the thicker part of the special-shaped pipe top wall of the forming cavity, so that the integrated forging is easier to form, and the integrated forming is easier, thereby solving the problem of integrated forming difficulty and improving the mechanical properties of the special-shaped pipe. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a special-shaped pipe perspective view of the present application;

[0016] Figure 2 is a special-shaped pipe left view of the present application;

[0017] Figure 3 is a special-shaped pipe right view of the present application;

[0018] Figure 4 is Figure 3 is a sectional view along A-A;

[0019] Figure 5 is a schematic diagram of a conventional way of forming a profiled pipe by die forging;

[0020] Figure 6 is a schematic diagram of the structure of the forming die of the present application;

[0021] Figure 7 is a sectional view of the forming die of the present application;

[0022] Figure 8 is a schematic diagram of the structure of the upper die;

[0023] Figure 9 is a schematic diagram of the structure of the lower die;

[0024] Figure 10 is an enlarged view of B of Figure 7

[0025] Figure 11 is a schematic diagram of the profiled pipe formed by the forming die of the present application;

[0026] Figure 12 is an enlarged view of C of Figure 7

[0027] In the drawings: profiled pipe body 1, forming die 2, blank 3, circular flow channel hole 11, upper die 21, lower die 22, core rod 23, forming cavity 24, upper part cavity 211, notch 212, clamping groove 213, lower part cavity 221, extension 222, core rod guide groove 223, core rod limiting platform 224, storage groove 225, flash groove 226. DETAILED DESCRIPTION

[0028] The present application will be further described below in conjunction with the drawings and examples.

[0029] As shown in Figures 1 to 4 , the profiled pipe targeted by the present application comprises a profiled pipe body 1, which is provided with a circular flow channel hole 11 extending linearly from one end to the other end of the profiled pipe body 1, the diameter of the circular flow channel hole 11 being consistent from one end to the other end, the top wall of the profiled pipe body 1 gradually increasing in thickness from one end to the other end, the two side walls both gradually increasing in thickness from the thicker end to the thinner end of the top wall, and the bottom wall having the same thickness from one end to the other end. For the profiled pipe with the above special structure, since the two side walls both gradually increase in thickness from the thicker end to the thinner end of the top wall, the material at the end of the pipe-shaped blank corresponding to the thicker end of the top wall of the profiled pipe body needs to be moved to the other end of the blank during forming. As shown in Figure 5 ​​As shown, if the corresponding forming die is designed by using the conventional die design method, the upper die 21 and the lower die 22 of the die cannot well limit the blank 3 during the forming process, which is not conducive to moving the material at the end of the top wall of the formed special-shaped pipe body (the end corresponding to the end of the blank and the top wall of the formed special-shaped pipe body) to the other end of the blank, nor is it conducive to the flow of the material at the top of the blank to the thick part of the top wall of the formed special-shaped pipe body, and thus the forming is difficult.

[0030] As shown in the drawings, Figures 6 to 9 The forming die 2 of the present application is provided with a forming cavity 24 for forming the shape of the special-shaped pipe body 1. The forming cavity 24 is designed according to the shape size of the special-shaped pipe body 1, the bottom surface of the forming cavity 24 is inclined from one end to the other end of the forming cavity 24, the top surface of the forming cavity 24 is horizontally arranged from one end to the other end of the forming cavity 24, and the forming cavity 24 is used to form the end of the top wall of the special-shaped pipe body 1 with smaller thickness as the high end (the height of the end of the forming cavity corresponding to the end of the top wall of the formed special-shaped pipe body 1 with smaller thickness is higher than the height of the other end of the forming cavity bottom surface); the forming die 2 comprises an upper die 21, a lower die 22 and a core rod 23 for forming the circular flow channel hole 11; the diameter of the core rod 23 is correspondingly arranged according to the diameter of the circular flow channel hole 11; the forming cavity 24 is formed by the upper part of the cavity 211 arranged on the upper die 21 and the lower part of the cavity 221 arranged on the lower die 22; the upper part of the cavity 211 is provided with an opening at the end corresponding to the low end of the forming cavity 24 to form a notch 212; the lower part of the cavity 221 is provided with an extension 222 on the side wall of the end corresponding to the low end of the forming cavity 24, which is adapted to the notch 212 to close the notch 212, and the two ends of the lower part of the cavity 221 are respectively provided with a core rod limiting table 224 for limiting the downward stroke of the core rod 23.

[0031] As shown in the drawings, Figure 11 During forming, the blank 3 made of pipe material is placed in the lower die 22, the core rod 23 is inserted into the blank 3, and then the upper die 21 is used to press down the blank, so that the blank material fills the forming cavity 24 of the die. The core rod limiting table 224 limits the stroke of the downward movement of the core rod 23, thereby controlling the thickness of the bottom wall of the special-shaped pipe body to be consistent with the required size.

[0032] In this invention, the bottom surface of the molding cavity 24 is inclined from one end to the other, and the top surface of the molding cavity 24 is horizontal from one end to the other. The end of the molding cavity 24 where the top wall thickness of the shaped tube body 1 is smaller is designated as the high end. A notch 212 is provided at the end of the upper cavity 211 corresponding to the low end of the molding cavity 24, and an extension 222 is provided on the side wall of the lower cavity 221 corresponding to the low end of the molding cavity 24 to fit and close the notch 212. Figure 11 As shown, during the molding process, the side wall of the extension 222 of the lower mold can be used to limit the thicker end of the top wall of the shaped tube formed from the blank 3. Therefore, during the molding process, the material of the side wall of the blank 3 located at the thicker end of the top wall of the shaped tube body in the molding cavity 24 can move to the other end of the blank. It is also beneficial for the material at the top of the blank to flow to the thicker part of the top wall of the shaped tube body in the molding cavity. Therefore, the molding is easier and can be integrally molded, which solves the problem of the difficulty of integral molding and improves the mechanical properties of the shaped tube.

[0033] In this invention, the lower cavity 221, corresponding to the lower end of the forming cavity 24, has a mandrel guide groove 223 extending downward and slidingly engaging with one end of the mandrel 23 on its sidewall. The upper cavity 211, corresponding to the upper end of the forming cavity 24, has a retaining groove 213 extending downward and slidingly engaging with the other end of the mandrel 23 on its sidewall. The retaining groove 213 and the mandrel guide groove 223 can be used to position both ends of the mandrel, preventing mandrel position displacement during the forming process and better ensuring that the formed forging meets the requirements.

[0034] like Figure 10 As shown, the mandrel limiting stage 224 of the present invention is provided with a storage tank 225 for storing excess material.

[0035] To facilitate demolding, both the upper cavity 211 and the lower cavity 221 of the present invention are provided with a draft angle of 7° to 9°.

[0036] like Figure 12 In this invention, the junction of the lower mold 22 and the upper mold 21 is provided with a flash groove 226 that communicates with the molding cavity 24 to accommodate excess material.

Claims

1. An integrated forging mold for irregularly shaped tubes, wherein the irregularly shaped tube includes an irregularly shaped tube body (1), the irregularly shaped tube body (1) having a circular flow channel hole (11) extending linearly from one end to the other end, the circular flow channel hole (11) having the same diameter from one end to the other end, the top wall of the irregularly shaped tube body (1) gradually increasing in thickness from one end to the other end, both side walls gradually increasing in thickness from the thicker end to the thinner end of the top wall, and the bottom wall having the same thickness from one end to the other end, characterized in that: The forming mold is provided with a forming cavity (24) for forming the shape of the shaped tube body (1). The bottom surface of the forming cavity (24) is inclined from one end to the other end. The top surface of the forming cavity (24) is horizontal from one end to the other end. The end of the forming cavity (24) used to form the shaped tube body (1) with a smaller top wall thickness is the high end. The molding die includes an upper die (21), a lower die (22) and a mandrel (23) for molding the circular flow channel hole (11). The molding cavity (24) is formed by the cooperation of an upper cavity (211) on the upper die (21) and a lower cavity (221) on the lower die (22). The upper cavity (211) is provided with an opening at one end corresponding to the lower end of the molding cavity (24) to form a notch (212). The lower cavity (221) has an extension (222) on one side wall corresponding to the lower end of the molding cavity (24) that is adapted to the notch (212) to close the notch (212). The two ends of the lower cavity (221) are respectively provided with a mandrel limiting platform (224) for limiting the downward movement of the mandrel (23).

2. The integrated forging mold for irregularly shaped tubes as described in claim 1, characterized in that: The lower cavity (221) has a mandrel guide groove (223) that extends downward and slides with one end of the mandrel (23) on one side wall corresponding to the lower end of the molding cavity (24). The upper cavity (211) has a slot (213) that extends downward and slides with the other end of the mandrel (23) on one side wall corresponding to the upper end of the molding cavity (24).

3. The integrated forging mold for irregularly shaped tubes as described in claim 1 or 2, characterized in that: The mandrel limiting stage (224) is provided with a storage tank (225).

4. The integrated forging mold for irregularly shaped tubes as described in claim 1, characterized in that: Both the upper cavity (211) and the lower cavity (221) are provided with a draft angle of 7° to 9°.

5. The integrated forging mold for irregularly shaped tubes as described in claim 1, characterized in that: The lower mold (22) and the upper mold (21) are provided with a flash groove (226) that communicates with the forming cavity (24).

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