Manufacturing process of hexagonal runner pipe fitting

Abstract

The invention discloses a manufacturing process of a hexagonal runner pipe fitting, which comprises the following process steps of: A1, manufacturing two symmetrical semicircular solid pieces, and closing the two solid pieces to form a circular piece; a2, grooves are formed in the opposite faces of the two solid parts, the grooves penetrate through the solid parts in the length direction of the solid parts, and a hexagonal flow channel is formed in the middle after the two solid parts are folded; a3, the opposite faces of the two solid pieces are made into inclined faces, the inclined faces are located on the two sides of the groove, and after the two solid pieces are folded, a welding seam area is formed between the two vertically-opposite inclined faces; a4, two solid pieces are welded and fixed in the welding seam area, and a hexagonal runner pipe fitting is obtained; and A5, a flange is welded to the end of the hexagonal flow channel pipe fitting. According to the method, the hexagonal runner with the accurate size can be manufactured in the pipe fitting, the process is simple and reliable, and the quality of the manufactured pipe fitting meets the requirement.

Description

Technical Field

[0001] The invention relates to the technical field of pipe fitting manufacturing, and in particular to a manufacturing process of a hexagonal flow channel pipe fitting. Background Art

[0002] Generally, the cross-section of the flow channel inside the pipe fitting is circular, which can be achieved by a drill bit. However, in some special cases, the pipe fitting needs a flow channel with a hexagonal cross-section. The current manufacturing process cannot directly achieve the production of hexagonal flow channels through a drill bit, and some equipment cannot produce hexagonal flow channels with dimensions that meet the requirements. Therefore, a manufacturing process for hexagonal pipe fittings is urgently needed. Summary of the invention

[0003] The purpose of the present invention is to provide a manufacturing process for a hexagonal flow channel pipe fitting, which can manufacture a hexagonal flow channel with precise size inside the pipe fitting, the process is simple and reliable, and the quality of the manufactured pipe fitting meets the requirements.

[0004] In order to solve the above technical problems, the present invention adopts the following solutions:

[0005] A manufacturing process for a hexagonal flow channel pipe fitting includes the following process steps:

[0006] A1: Make two symmetrical semicircular solid pieces, which will form a circular piece when put together;

[0007] A2: A groove is provided on the opposite surfaces of the two solid parts. The groove runs through the solid parts along the length direction. When the two solid parts are closed, a hexagonal flow channel is formed in the middle;

[0008] A3: The opposite surfaces of the two solid parts are made into inclined surfaces, and the inclined surfaces are located on both sides of the groove. When the two solid parts are closed, the welding seam area is formed between the two inclined surfaces facing each other up and down;

[0009] A4: Weld and fix two solid parts in the weld area to obtain a hexagonal flow channel fitting;

[0010] A5: Hexagonal flow channel pipe end welding flange.

[0011] In this scheme, two symmetrical semicircular solid parts are first made, and the opposite surfaces of the two solid parts are flat surfaces. Then, grooves that meet the precision are opened on the flat surfaces along the length direction of the solid parts. After the two solid parts are closed, the two opposite grooves constitute a hexagonal flow channel with composite precision. After the grooves are opened, the surfaces on both sides of the grooves are still flat surfaces. At this time, the flat surfaces are processed into inclined surfaces, so that after the two solid parts are closed, the two upper and lower opposite inclined surfaces form a welding area. Then, welding equipment is used to weld in the welding area, and the two solid parts are welded and fixed to obtain a hexagonal flow channel pipe fitting. After the two solid parts are welded and fixed, flanges are welded at one or both ends of the pipe fitting, and the flanges are connected to the corresponding pipelines later. Through this process, hexagonal flow channel pipe fittings with precise dimensions can be obtained. This process is simple and reliable, and the quality of the manufactured pipe fittings meets the requirements.

[0012] Optionally, in the process of making the inclined surface, a card block is formed on the bottom surface of the upper solid piece, and the card block is located on both sides of the groove. A card slot adapted to the card block is formed on the top surface of the lower solid piece, and the card slot is located on both sides of the groove. After the two solid pieces are closed, the card block is inserted into the card slot.

[0013] Optionally, the cross section of the weld area is triangular, and the angle between the two inclined surfaces is an acute angle.

[0014] Optionally, before welding the two solid parts, a matching support part needs to be placed in the hexagonal flow channel, and the length of the support part is greater than the length of the solid part.

[0015] Optionally, the support member is a hexagonal cube with a hexagonal cross section.

[0016] Optionally, before welding, one of the solid parts is placed on the welding table, and then the support part is placed in the groove of the solid part, with both ends of the support part located outside the solid part, and then the other solid part is buckled on the solid part below, and the two solid parts and the support part are locked and fixed along the length direction of the welding table through multiple clamps.

[0017] Optionally, when welding the flange, a hexagonal hole matching the support member is provided in the middle of the flange, and the end of the support member passes through the hexagonal hole in the middle of the flange. Welding begins after the inner side surface of the flange contacts the end surface of the pipe fitting.

[0018] Optionally, when welding two solid parts, symmetrical welding is performed layer by layer.

[0019] Optionally, after the flange welding is completed, the entire pipe fitting is subjected to stress relief heat treatment.

[0020] Optionally, the pipe fitting is cooled after the heat treatment is completed, and after cooling, the support member is destroyed using a deep hole boring machine, the support member is removed, and finally the pipe fitting is ground.

[0021] The present invention has the beneficial effects:

[0022] 1. In the present invention, hexagonal flow channel pipe fittings with precise dimensions can be obtained by processing the hexagonal flow channel in sections. The process is simple and reliable, and the quality of the manufactured pipe fittings meets the requirements.

[0023] 2. Before welding the two solid parts, a support member that matches the size of the hexagonal flow channel is set between the two grooves. After fixing the two solid parts, the support member can slide along the length direction of the hexagonal flow channel. The straightness of the hexagonal flow channel can be checked by sliding the support member. If there is no sticking during the sliding process, the straightness of the hexagonal flow channel is considered to be qualified. At the same time, during welding, the support member causes the inner side of the flow channel weld to be subjected to an external force, which can reduce the shrinkage of the weld during the welding process.

[0024] 3. When two solid parts are spliced, the socket method of inserting the card block into the card slot is adopted to avoid the misalignment of the two solid parts during the welding process and ensure that the size of the hexagonal flow channel meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the process flow of the present invention;

[0026] Figure 2 It is a structural schematic diagram of a semicircular solid piece;

[0027] Figure 3 It is a schematic diagram of the structure after the groove is processed in the semicircular solid part;

[0028] Figure 4 A structural diagram for processing a solid part with a clamping block;

[0029] Figure 5 A structural diagram for processing a solid part with a slot;

[0030] Figure 6 It is a schematic diagram of the cross-sectional structure before the card block is inserted into the card slot;

[0031] Figure 7 It is a schematic diagram of the cross-sectional structure after the card block is inserted into the card slot;

[0032] Figure 8 The end structure diagram of the solid part locked on the welding table;

[0033] Fig. 9 is the distribution structure diagram of the clamp;

[0034] Fig.10 This is the structural diagram of the flange and the support when assembled;

[0035] Fig.11 A cross-sectional view of the support member.

[0036] Figure numerals: 1-solid part, 2-groove, 3-flat surface, 4-block, 5-slot, 6-inclined surface, 7-welding area, 8-hexagonal flow channel, 9-welding platform, 10-clamp, 11-flange, 12-support part, 13-through hole, 14-through groove. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0038] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Example

[0041] like Figure 1 As shown, a manufacturing process of a hexagonal flow channel pipe fitting includes the following process steps:

[0042] A1: Two symmetrical semicircular solid pieces 1 are manufactured, and the two solid pieces 1 are put together to form a circular piece;

[0043] A2: A groove 2 is provided on the opposite surfaces of the two solid pieces 1. The groove 2 penetrates the solid piece 1 along the length direction of the solid piece 1. When the two solid pieces 1 are closed, a hexagonal flow channel 8 is formed in the middle;

[0044] A3: The opposite surfaces of the two solid pieces 1 are made into inclined surfaces 6, and the inclined surfaces 6 are located on both sides of the groove 2. When the two solid pieces 1 are closed, the two inclined surfaces 6 facing each other form a welding seam area 7;

[0045] A4: Weld and fix two solid parts 1 in the weld area 7 to obtain a hexagonal flow channel 8 pipe fitting;

[0046] A5: Hexagonal flow channel 8 pipe end welding flange 11.

[0047] In this embodiment, the length of the semicircular solid body is generally 2000 mm. Figure 2 As shown, two symmetrical semicircular solid pieces 1 are first made, and the opposite surfaces of the two solid pieces 1 are flat surfaces 3, as shown in FIG. Figure 3 As shown, a groove 2 with a precision is then opened on the flat surface 3 along the length direction of the solid piece 1. After the two solid pieces 1 are closed, the two opposite grooves 2 form a hexagonal flow channel 8 with a composite precision. After the groove 2 is opened, the surfaces on both sides of the groove 2 are still flat surfaces 3, as shown in FIG. Figure 4 and Figure 5 As shown, at this time, the flat surface 3 is processed into an inclined surface 6 so that after the two solid pieces 1 are closed, as shown in FIG. Figure 7 As shown, a weld area 7 is formed between two upper and lower inclined surfaces 6 that are opposite to each other. Then, welding is performed in the weld area 7 by welding equipment to weld and fix two solid pieces 1 to obtain a hexagonal flow channel 8 pipe fitting. After the two solid pieces 1 are welded and fixed, a flange 11 is welded at one or both ends of the pipe fitting. The flange 11 can be connected to the corresponding pipeline later. Through this process, a hexagonal flow channel 8 pipe fitting with precise size can be obtained. This process is simple and reliable, and the quality of the manufactured pipe fitting meets the requirements.

[0048] Further, such as Figure 6 As shown, in the process of making the inclined surface 6, a block 4 is formed on the bottom surface of the upper solid piece 1 at the same time, and the block 4 is located on both sides of the groove 2. A slot 5 adapted to the block 4 is formed on the top surface of the lower solid piece 1, and the slot 5 is located on both sides of the groove 2. After the two solid pieces 1 are closed, the block 4 is inserted into the slot 5.

[0049] Specifically, when the two solid pieces 1 are spliced, a socket-and-socket method of inserting the clamping block 4 into the clamping groove 5 is adopted, which can avoid the misalignment of the two solid pieces 1 during welding and ensure that the size of the hexagonal flow channel 8 meets the requirements.

[0050] Furthermore, the cross section of the weld area 7 is triangular, and the angle between the two inclined surfaces 6 is an acute angle.

[0051] Specifically, the angle between the two upper and lower inclined surfaces 6 is 60°, and a triangular weld area 7 is used. During the welding process, the weld area 7 is completely filled with solder to form a triangular connection portion. The triangle has higher stability, thereby making the welding of the two solid parts 1 more secure.

[0052] Furthermore, before welding the two solid pieces 1 , an adaptable support piece 12 needs to be placed in the hexagonal flow channel 8 , and the length of the support piece 12 is greater than the length of the solid piece 1 .

[0053] Furthermore, the support member 12 is a hexagonal cube with a hexagonal cross section.

[0054] Furthermore, before welding, one of the solid parts 1 is placed on the welding table 9, and then the support part 12 is placed in the groove 2 of the solid part 1, with both ends of the support part 1 located on the outside of the solid part 1, and then the other solid part 1 is buckled on the lower solid part 1, and the two solid parts 1 and the support part 12 are locked and fixed along the length direction of the welding table 9 by multiple clamps 10.

[0055] Specifically, Figure 8 and Fig. 9 As shown, before welding the two solid pieces 1, a support piece 12 matching the size of the hexagonal flow channel 8 is arranged between the two grooves 2. After the two solid pieces 1 are fixed, the support piece 12 can slide along the length direction of the hexagonal flow channel 8. Through the sliding of the support piece 12, the straightness of the hexagonal flow channel 8 can be checked. If there is no jamming during the sliding process, the straightness of the hexagonal flow channel 8 is considered to be qualified. At the same time, during welding, the support piece 12 causes an external force to be applied to the inner side of the flow channel weld, which can reduce the shrinkage of the weld during the welding process. Fig.11 As shown, a through hole 13 is opened in the middle of the hexagonal body, which is convenient for the deep hole boring machine to destroy the hexagonal body later, so as to better remove the support member 12. The hexagonal body is made of copper material, and the roughness of the surface of the hexagonal body is 1.6, so that when sliding to check the straightness of the hexagonal flow channel 8, the friction resistance is smaller, and at the same time, the six top corners of the hexagonal body are chamfered, and the chamfer arc is 120°. In this way, when the hexagonal body slides in the hexagonal flow channel 8, there is a certain gap between its top corners and the six corners inside the hexagonal flow channel 8, which reduces the contact area and makes the sliding of the hexagonal body smoother. In addition, through grooves 14 can be opened on the six surfaces of the hexagonal body to save the material of the hexagonal body.

[0056] Further, such as Fig.10 As shown, when welding the flange 11, the middle of the flange 11 has a hexagonal hole adapted to the support member 12, the end of the support member 12 passes through the hexagonal hole in the middle of the flange 11, and welding begins after the inner side surface of the flange 11 contacts the end surface of the pipe fitting.

[0057] Furthermore, when welding the two solid parts 1, symmetrical welding is adopted layer by layer.

[0058] Furthermore, after the flange 11 is welded, the entire pipe is subjected to a heat treatment for stress relief.

[0059] Furthermore, after the heat treatment is completed, the pipe fitting is cooled, and after cooling, the support member 12 is destroyed by using a deep hole boring machine, the support member 12 is taken out, and finally the pipe fitting is ground.

[0060] The specific principle of this process is as follows: First, the raw material S31068 is selected as the manufacturing material of the solid part 1. The raw material is forged to obtain a semicircular solid part 1. The flat surface 3 of the solid part 1 is rough milled, heat treated, and fine milled to obtain a semi-hexagonal groove 2. Then, the measuring tool is used to check whether the size of the groove 2 meets the standard. The roughness of the groove 2 is better than 3.2. At the same time, a block 4 is milled on the bottom surface of the upper solid part 1. The block 4 is located at both ends of the side wall of the upper groove 2 and protrudes downward. A slot 5 that matches the block 4 is milled on the top surface of the lower solid part 1. The straight surfaces 3 on both sides of the groove 2 are also milled into inclined surfaces 6. A CNC gantry milling machine can be used. Its precision is 0.02mm. The CNC gantry milling machine uses imported tools from Sandvik, Sweden. After the two solid parts 1 are assembled together, a triangular welding area 7 is formed between the two inclined surfaces 6 facing each other, which reserves space for filling the solder later. After the solid part 1 is inspected, it is cleaned and dried. First, the solid part 1 with the card slot 5 at the bottom is placed on the welding table 9, and then the support part 12 is placed in the groove 2 of the solid part 1, and then the solid part 1 with the card block 4 is buckled on the support part 12. The two solid parts 1 are fixed with tooling, and the support part 12 is used inside, and the clamp 10 is used outside for installation. Fig. 9 As shown, a pair of clamps 10 is installed for every 300 mm. After the two solid parts 1 are clamped with the clamps 10, the support 12 is slid to check the straightness of the hexagonal flow channel 8. The support 12 enters from one end of the hexagonal flow channel 8 and exits from the other end. It is qualified if there is no jamming phenomenon. After the installation is completed, the hexagonal flow channel 8 is welded by argon arc welding, cooling water is passed inside, and symmetrical segmented welding is performed. After the temperature cools down, the next segment is welded. At the same time, symmetrical welding is increased layer by layer until the entire hexagonal flow channel 8 is welded. Welding material selection: The welding material is CHG-316 material, TIG welding method is adopted, argon gas protection can ensure that the welding does not introduce other materials that directly contact the liquid metal, and RT flaw detection is performed on the weld after welding; then the hexagonal hole in the middle of the flange 11 is set on the support 12, and the support 12 ensures the concentricity of the flange 11 welding. The inner side of the flange 11 contacts the end face of the pipe fitting, and welding is started to fix the flange 11. After the flange 11 is welded, the entire pipe fitting is subjected to a stress-relieving heat treatment. After the heat treatment, the pipe fitting is cooled. After cooling, the support 12 is destroyed using a deep hole boring machine, the support 12 is removed, and finally the pipe fitting is polished to obtain a hexagonal flow channel 8 pipe fitting that meets the requirements.

[0061] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. According to the technical essence of the present invention, within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A manufacturing process for a hexagonal flow channel pipe, characterized in that: The process steps include: A1: Two symmetrical semicircular solid pieces (1) are manufactured, and the two solid pieces (1) are put together to form a circular piece; A2: Grooves (2) are provided on the opposite surfaces of the two solid pieces (1), the grooves (2) penetrate the solid pieces (1) along the length direction of the solid pieces (1), and a hexagonal flow channel (8) is formed in the middle of the two solid pieces (1) when they are closed; A3: The opposing surfaces of the two solid pieces (1) are made into inclined surfaces (6), and the inclined surfaces (6) are located on both sides of the groove (2). When the two solid pieces (1) are closed, the two inclined surfaces (6) facing each other form a welding seam area (7); A4: Welding and fixing two solid parts (1) in the weld area (7) to obtain a hexagonal flow channel (8) pipe fitting; A5: Hexagonal flow channel (8) pipe end welding flange (11).

2. The manufacturing process of a hexagonal flow channel pipe according to claim 1, characterized in that: In the process of manufacturing the inclined surface (6), a clamping block (4) is formed on the bottom surface of the upper solid piece (1), and the clamping block (4) is located on both sides of the groove (2). A clamping groove (5) adapted to the clamping block (4) is formed on the top surface of the lower solid piece (1), and the clamping groove (5) is located on both sides of the groove (2). After the two solid pieces (1) are closed, the clamping block (4) is inserted into the clamping groove (5).

3. The manufacturing process of a hexagonal flow channel pipe according to claim 1, characterized in that: The cross section of the weld area (7) is triangular, and the angle between the two inclined surfaces (6) is an acute angle.

4. The manufacturing process of a hexagonal flow channel pipe according to claim 1, characterized in that: Before welding the two solid pieces (1), a matching support piece (12) needs to be placed in the hexagonal flow channel (8), and the length of the support piece (12) is greater than the length of the solid piece (1).

5. The manufacturing process of a hexagonal flow channel pipe according to claim 4, characterized in that: The support member (12) is a hexagonal body with a hexagonal cross section.

6. The manufacturing process of a hexagonal flow channel pipe according to claim 4, characterized in that: Before welding, one of the solid pieces (1) is first placed on a welding table (9), and then the support piece (12) is placed in the groove (2) of the solid piece (1), with both ends of the support piece (12) located outside the solid piece (1). Then, the other solid piece (1) is buckled onto the lower solid piece (1), and the two solid pieces (1) and the support piece (12) are locked and fixed along the length direction of the welding table (9) by using a plurality of clamps (10).

7. The manufacturing process of a hexagonal flow channel pipe according to claim 1, characterized in that: When welding the flange (11), the middle of the flange (11) has a hexagonal hole adapted to the support member (12), the end of the support member (12) passes through the hexagonal hole in the middle of the flange (11), and welding begins after the inner side surface of the flange (11) contacts the end surface of the pipe fitting.

8. The manufacturing process of a hexagonal flow channel pipe according to claim 1, characterized in that: When welding two solid parts (1), symmetrical welding is adopted layer by layer.

9. The manufacturing process of a hexagonal flow channel pipe according to claim 1, characterized in that: After the flange (11) is welded, the entire pipe is subjected to a heat treatment for stress relief.

10. The manufacturing process of a hexagonal flow channel pipe according to claim 9, characterized in that: After the heat treatment is completed, the pipe fitting is cooled, and after cooling, the support member (12) is destroyed by using a deep hole boring machine, the support member (12) is taken out, and finally the pipe fitting is polished.

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