Pipe fitting and thin-wall part welding tool

Abstract

The utility model provides a welding tool for a pipe fitting and a thin-wall part, and solves the technical problem that the pipe fitting and the thin-wall part are easy to move up and down and left and right during welding in the prior art. The pipe fitting and thin-wall part welding tool comprises a connecting unit supported in the pipe fitting and a plug block unit supported in the thin-wall part, and when the plug block unit is connected with the connecting unit, a to-be-welded part of the pipe fitting is attached to a to-be-welded part of the thin-wall part. By arranging the connecting unit arranged in the pipe fitting and the plug block unit arranged in the thin-wall part in a connected mode, when the pipe connector and the thin-wall part are welded, the pipe connector and the thin-wall part are supported, consistency and stability are guaranteed, meanwhile, thermal stress deformation of the thin-wall part is prevented by means of the crimping unit, and the welding quality of the thin-wall part is improved. And protective gas is introduced into the gas channel to protect the welding seam and rapidly cool the welded part, so that the influence of thermal deformation is effectively reduced, and overheating is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to a welding tool for pipe fittings and thin-walled parts. Background Art

[0002] When pipe fittings and thin-walled parts are connected by welding: 1. Since the welding part is located at the edge of the thin-walled part and the welding temperature is high, it is very easy to cause welding shrinkage deformation or the welded parts to melt and penetrate, which cannot meet the welding requirements and ultimately affect the performance of the product; 2. Based on product design requirements, strict welding accuracy requirements are imposed on thin-walled parts and pipe fittings. Excessive concentration of welding heat will cause thermal stress deformation and affect the accuracy of parts; 3. Traditional manual welding has strong flexibility, but manual operation is easily affected by factors such as hand experience and environment, and it is difficult to achieve consistency and stability of the weld.

[0003] In order to solve the above problems and improve the accuracy and effect of welding between pipe fittings and thin-walled parts, a Chinese utility model patent with an authorization announcement date of 2017-12-8 and an authorization announcement number of CN206717355U discloses a flexible full-circle welding tool for thin-walled containers, wherein the thin-walled container comprises an upper cylinder section and a lower cylinder section, wherein the upper cylinder section is provided with a positioning group, and the lower cylinder section is provided with a pair of positioning groups and a bushing, wherein the pair of positioning groups are arranged up and down, and the bushing is connected to the expansion tube of the pair of positioning groups, and the bushing is provided with a plurality of welding holes in the annular direction, and the welding holes are located between the pair of positioning groups.

[0004] When using the above-mentioned flexible full-circle welding tooling for thin-walled containers, although the positioning group can play a certain fixing role, the pipe fittings and thin-walled parts are prone to move up and down during the welding process, making it difficult to achieve consistency and stability of the weld. In addition, there are problems such as welding shrinkage and deformation caused by concentrated heat during welding, and melting and penetration of the welded parts. Utility Model Content

[0005] The utility model provides a welding tool for pipe fittings and thin-walled parts, which solves the technical problem in the prior art that pipe fittings and thin-walled parts are prone to move up and down during welding.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A welding tool for pipe fittings and thin-walled parts, comprising a connection unit supported inside the pipe fitting and a plug unit supported inside the thin-walled part. When the plug unit is connected to the connection unit, the part to be welded of the pipe fitting fits the part to be welded of the thin-walled part. By providing a connection unit placed inside the pipe fitting and connecting the plug unit placed inside the thin-walled part, a supporting effect is played when welding the pipe joint and the thin-walled part, ensuring consistency and stability.

[0008] Furthermore, the plug unit is provided with a connection groove, and the connection groove is engaged with the lower end of the connection unit. By engaging the connection groove with the lower end of the connection unit, a firm connection between the connection unit and the plug unit can be ensured. The design of the connection groove makes the connection between the connection unit and the plug unit more stable, can withstand the force and vibration during the welding process, and reduces displacement and deformation during the welding process.

[0009] Furthermore, the lower end of the connecting unit is a stepped first protrusion, and the connecting groove is a stepped inverted cone-shaped first groove. This ensures that the pipe fitting and the thin-walled part are correctly aligned and fitted during the welding process. Through the design of the stepped first protrusion of the connecting unit and the stepped inverted cone-shaped first groove of the plug unit, accurate positioning and alignment between the pipe fitting and the thin-walled part can be achieved. When the connecting unit and the plug unit are connected, the inverted cone-shaped first groove and the first protrusion are embedded in each other, ensuring close contact between the part to be welded of the pipe fitting and the part to be welded of the thin-walled part.

[0010] Furthermore, a threaded column is connected to the center of the first protrusion, and a screw hole is provided at the center of the groove to be threadedly matched with the threaded column. Through the cooperation of the threaded column and the screw hole, the degree of fastening between the connection unit and the plug unit can be adjusted as needed, thereby ensuring the fit between the pipe fitting and the thin-walled part. By rotating the threaded column, the assembly and disassembly of the tooling can be conveniently realized, thereby improving the convenience and efficiency of the operation.

[0011] Furthermore, a knob is connected to the upper end of the connection unit, and the knob is connected to the threaded column through a connection rod that penetrates the connection unit. The degree of fastening between the connection unit and the plug unit can be adjusted conveniently and quickly. By operating the knob, the connection unit and the plug unit can be easily tightened or loosened, thereby adjusting the degree of fit between the pipe fitting and the thin-walled part. This adjustability can meet the welding requirements of pipe fittings and thin-walled parts of different specifications and sizes, and improve the flexibility and applicability of the tooling.

[0012] Furthermore, the upper end of the plug unit is connected to a second protrusion, and the lower end of the connection unit is provided with a second groove that is engaged with the block. The second protrusions can be three, distributed in a triangle, and the second grooves are also distributed in three corresponding ways. The three-point positioning is more stable and reliable, and the consistency of the welding process is improved.

[0013] Furthermore, the connecting surfaces of the plug unit and the connecting unit are both provided with magnetic units, which can be quickly positioned during the clamping and assist in assembly and disassembly.

[0014] Furthermore, a crimping unit connected to the plug unit is provided outside the thin-walled member, and the crimping unit is connected to the plug unit via a limiting pin. The connection between the crimping unit and the plug unit is fixed by the limiting pin, ensuring that the relative position of the thin-walled member and the plug unit remains stable during the welding process, avoiding movement or displacement, thereby ensuring the accuracy and consistency of the welding. This can improve the quality of welding and reduce errors and defects during the welding process.

[0015] Furthermore, an annular groove is provided between the connection unit and the plug unit, and the plug unit is provided with an air channel penetrating the annular groove. The dual-channel air channel allows flowing gas to cool the welded part, thereby effectively reducing the influence of thermal deformation to prevent overheating.

[0016] Furthermore, a blocking member for blocking the pipe from sliding upward is provided at the upper end of the connection unit. The setting of the blocking member prevents the pipe from sliding upward during the welding process, thereby ensuring the stability and accuracy of the welding.

[0017] The beneficial effects of the utility model are:

[0018] The utility model provides a connecting unit placed in the pipe fitting, which is connected to the plug unit placed in the thin-walled part. When welding the pipe interface and the thin-walled part, the utility model supports the thin-walled part and ensures consistency and stability. At the same time, the thin-walled part is prevented from being deformed by thermal stress by means of the crimping unit. The protective gas is passed through the airway to protect the weld and quickly cool the welded part, thereby effectively reducing the influence of thermal deformation to prevent overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0020] Figure 2 It is an exploded diagram of the utility model;

[0021] Figure 3 It is a cross-sectional view of the plug of the utility model;

[0022] Figure 4 It is a cross-sectional view of the pipe interface of the utility model.

[0023] As shown in the figure:

[0024] 1. Pipe fittings;

[0025] 111, thin-walled part; 112, crimping unit; 113, limiting pin; 114, first groove;

[0026] 1131, nut; 1132, thick screw; 1133, thin screw;

[0027] 2. Tooling structure;

[0028] 211, connecting unit; 212, plug unit; 213, airway; 214, fixing groove; 215, connecting groove;

[0029] 2111, connecting column; 2112, knob; 2113, first protrusion; 2114, threaded column; 2115, blocking member. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention are only for the purpose of describing specific implementation methods and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] Embodiment 1, a welding tool for pipe fittings and thin-walled parts, such as Figure 1 , Figure 2 As shown, it includes a connection unit 211 supported inside the pipe fitting 1 and a plug unit 212 supported inside the thin-walled part 111. When the plug unit 212 is connected to the connection unit 211, the part to be welded of the pipe fitting 1 fits with the part to be welded of the thin-walled part 111. By providing the connection unit 211 placed inside the pipe fitting 1 and connecting the plug unit 212 placed inside the thin-walled part 111, when welding the pipe interface and the thin-walled part 111, it plays a supporting role to ensure consistency and stability. The specific connection methods of the connection unit 211 and the plug unit 212 include but are not limited to mechanical connection, threaded connection, etc.

[0033] Example 2, as a preferred implementation of the welding tool for pipe fittings and thin-walled parts, as shown in Figure 2 As shown, the difference from Example 1 is that the plug unit 212 is provided with a connecting groove 215, and the connecting groove 215 is engaged with the lower end of the connecting unit 211. By engaging the connecting groove 215 with the lower end of the connecting unit 211, a firm connection between the connecting unit 211 and the plug unit 212 can be ensured. The design of the connecting groove 215 makes the connection between the connecting unit 211 and the plug unit 212 more stable, can withstand the force and vibration during the welding process, and reduce displacement and deformation during the welding process.

[0034] Example 3, as a preferred implementation of the welding tool for pipe fittings and thin-walled parts, as shown in Figure 2 As shown, the difference from Example 2 is that the lower end of the connecting unit 211 is a stepped first protrusion 2113, and the connecting groove 215 is a stepped first groove 114. The first groove can also be a stepped inverted cone groove to ensure the correct alignment and fit between the pipe fitting 1 and the thin-walled part 111 during the welding process. Through the design of the stepped first protrusion 2113 of the connecting unit 211 and the stepped inverted cone first groove 114 of the plug unit 212, accurate positioning and alignment between the pipe fitting 1 and the thin-walled part 111 can be achieved. When the connecting unit 211 and the plug unit 212 are connected, the inverted cone first groove 114 and the first protrusion 2113 are embedded in each other, ensuring the close contact between the part to be welded of the pipe fitting 1 and the part to be welded of the thin-walled part 111.

[0035] Example 4, as a preferred implementation of the welding tool for pipe fittings and thin-walled parts, as shown in Figure 2 , Figure 4 As shown, the difference from Example 3 is that a threaded column 2114 is connected to the center of the first protrusion 2113, and a screw hole is provided at the center of the groove to threadably cooperate with the threaded column 2114. Through the cooperation between the threaded column 2114 and the screw hole, the degree of fastening between the connecting unit 211 and the plug unit 212 can be adjusted as needed, thereby ensuring the fit between the pipe 1 and the thin-walled part 111. By rotating the threaded column 2114, the assembly and disassembly of the tooling can be conveniently realized, thereby improving the convenience and efficiency of the operation.

[0036] Example 5, as a preferred implementation of the welding tool for pipe fittings and thin-walled parts, as shown in Figure 2 , Figure 3 As shown, the difference from Example 4 is that the upper end of the connecting unit 211 is connected with a knob 2112, and the knob 2112 is connected to the threaded column 2114 through a connecting rod that penetrates the connecting unit 211. The degree of fastening between the connecting unit 211 and the plug unit 212 can be adjusted conveniently and quickly. Through the operation of the knob 2112, the connecting unit 211 and the plug unit 212 can be easily tightened or loosened, thereby adjusting the degree of fit between the pipe fitting 1 and the thin-walled part 111. This adjustability can adapt to the welding requirements of pipe fittings 1 and thin-walled parts 111 of different specifications and sizes, and improve the flexibility and applicability of the tooling.

[0037] Example 6, as a preferred implementation of the welding tool for pipe fittings and thin-walled parts, as shown in Figure 1 , Figure 3As shown, the difference from Example 1 is that the upper end of the plug unit 212 is connected to a second protrusion, and the lower end of the connecting unit 211 is provided with a second groove that is engaged with the block. The second protrusions can be three, distributed in a triangle, and the second grooves are also distributed in three corresponding ways. The three-point positioning is more stable and reliable, and the consistency of the welding process is improved.

[0038] Example 7, as a preferred implementation of the welding tool for pipe fittings and thin-walled parts, as shown in Figure 2 As shown, the difference from the embodiment 1 to the embodiment 6 is that the connection surfaces of the plug unit 212 and the connection unit 211 are both provided with magnetic units, which can be positioned quickly during the snap connection and the embedding, and play a role in assisting the disassembly and assembly.

[0039] Example 8, as a preferred implementation of the welding tool for pipe fittings and thin-walled parts, as shown in Figure 2 , Figure 3 As shown, the difference from Example 7 is that the outside of the thin-walled member 111 is provided with a crimping unit 112 connected to the plug unit 212, and the crimping unit 112 is connected to the plug unit 212 through a limiting pin 113. The limiting pin 113 includes a nut (1131) placed above the crimping structure, a thick screw (1132) located below the nut (1131) and penetrating the crimping structure, and a thin screw (1133) located below the thick screw (1132) and penetrating the plug (212). The crimping structure and the plug (212) are provided with a fixing groove (214) having a shape corresponding to the thick screw (1132) and the thin screw (1133), respectively. The connection between the crimping unit 112 and the plug unit 212 is fixed by the limiting pin 113, ensuring that the relative position of the thin-walled member 111 and the plug unit 212 remains stable during the welding process to avoid movement or displacement, thereby ensuring the accuracy and consistency of welding. This can improve the quality of welding and reduce errors and defects in the welding process.

[0040] Example 9, as a preferred implementation of the welding tool for pipe fittings and thin-walled parts, Figure 2 As shown, the difference from Example 8 is that an annular groove is provided between the connecting unit 211 and the plug unit 212, and the plug unit 212 is provided with an air passage 213 passing through the annular groove. The air passage 213 is passed with protective gas to protect the weld and quickly cool the welded part, thereby effectively reducing the influence of thermal deformation to prevent overheating.

[0041] Example 10, as a preferred implementation of the welding tool for pipe fittings and thin-walled parts, as shown in Figure 2As shown, the difference from Example 9 is that a stopper 2115 for stopping the pipe 1 from sliding upward is provided at the upper end of the connecting unit 211. The setting of the stopper 2115 prevents the pipe 1 from sliding upward during the welding process, thereby ensuring the stability and accuracy of the welding.

[0042] Embodiment 11, as Figure 1 and Figure 3 As shown, the welding tool provided by the utility model includes a pipe interface 1, a thin-walled member 111 located below the pipe interface 1, and a tool structure 2 located inside the pipe interface 1 and penetrating the pipe interface 1 and extending inside the thin-walled member 111. A pressing plate 112 is provided above the tool structure 2 and is sleeved outside the pipe interface 1 and placed on the thin-walled member 111. The pressing plate 112 is provided with a screw 113 penetrating the pressing plate 112 and the plug 212. The screw 113 includes a nut 1131 located above the pressing plate 112, a thick screw 1131 located below the nut 1131 and penetrating the pressing plate 112. 132. A thin screw 1133 is located below the coarse screw 1132 and passes through the plug 212. A stepped inverted cone-shaped groove 114 is provided on one side of the screw 113 and passes through the pressure plate 112. The tooling structure 2 includes a fixed column 211 placed inside the pipe interface 1. A plug 212 is provided below the fixed column 211 and is placed inside the thin-walled part 111 and corresponding to the fixed column 211. Fixed grooves 214 with shapes corresponding to the coarse screw 1132 and the thin screw 1133 are provided inside the pressure plate 112 and the plug 212, and an airway 213 is provided inside the plug 212.

[0043] In this embodiment, a fixed column arranged in the pipe interface 1 is connected to a plug block 212 placed in the thin-walled part 111, so as to support the pipe interface 1 and the thin-walled part 111 during welding to ensure consistency and stability. At the same time, the pressure plate 112 is used to prevent thermal stress deformation, and the protective gas is introduced into the air duct 213 to protect the weld and quickly cool the welded part, thereby effectively reducing the impact of thermal deformation to prevent overheating.

[0044] like Figure 2 and Figure 4 As shown, the fixed column 211 includes a connecting column 2111 placed in the pipe interface 1 and corresponding to the pipe interface 1, a knob 2112 is connected to the top of the connecting column 211, and the other end of the connecting column 211 is connected to the threaded column 2114 through an inverted cone-shaped connecting piece 2113, and the plug 212 is provided with a connecting groove 215215 corresponding to the threaded column 2114 and the connecting piece 2113, the connecting groove 215215 is connected to the airway 213, and the knob 2112 is provided with a notch for easy rotation. The upper end of the fixed column 211 is sleeved with a blocking ring 2115 whose inner diameter is larger than the diameter of the upper end opening of the pipe interface 1, and the blocking ring 2115 plays a limiting role.

[0045] In this embodiment, the plug block 212 in the utility model can be changed according to the different shapes of the welded thin-walled part 111, so as to achieve the adaptability of the tooling to the workpiece. The fixed column 211 is mounted on the pipe interface 1 to fix it. Its structure can be set to different shapes and specifications according to the shape and size of the pipe interface 1, and the middle can be used as a hollow part to reduce the weight of the tooling; the pressure plate 112 is fixed to the plug block 212 by screws 113. The screw 113 connection is conducive to controlling the degree of compression, which is convenient for adjusting and controlling the spacing between welded parts, thereby improving the accuracy of the workpiece after welding.

[0046] When in use, the plug block 212 is inserted into the thin-walled part 111, and the pipe interface 1 is fixed on the thin-walled part 111 using the fixing column 211. At the same time, the pressure plate 112 is pressed on the plug block 212 and the thin-walled part 111 by the screw 113, so that the relative position of the tooling and the workpiece is completely fixed, thereby realizing the preparation before welding.

[0047] The purpose of this innovative achievement is to solve the problem of thermal stress deformation caused by concentrated heat in argon arc welding when welding pipe interfaces and thin-walled parts, and to improve the one-time welding pass rate, avoid repeated welding and correction that lead to the inability to guarantee workpiece accuracy and reduced performance.

[0048] In the component connection, the pipe interface and the exhaust groove are welded together by argon arc welding. In view of the problem that the heat of argon arc welding is relatively concentrated and easily generates thermal stress deformation, a reasonable welding route is formulated and a segmented welding method is adopted to avoid excessive concentration of heat in continuous welding, which causes thermal stress deformation and affects the accuracy of parts. Reasonable tooling is designed, and air ducts are left on the tooling. During welding, shielding gas is passed to protect the weld and play a cooling role; in addition, a thick plate is used outside the exhaust groove for tightening, and a plug is added inside, which plays a role in shape correction on the one hand, and can timely conduct part of the heat on the other hand, thereby avoiding thermal stress deformation caused by concentrated heat.

[0049] Taking into account the environmental and human influences on the welding of pipe joints and thin-walled parts, special welding tools are designed to be more widely applicable to all products that use argon arc welding to weld pipe joints and thin-walled parts.

[0050] A new fixed tooling structure is used to reduce thermal stress deformation during welding and improve the adaptability of the tooling to the workpiece.

[0051] By setting a plug inside and using a pressure plate to tighten the outside, the workpiece being welded can be corrected to ensure the design accuracy of the workpiece.

[0052] There is an air channel on the tooling. When argon arc welding is used, shielding gas is introduced to protect the weld and quickly cool the welded part, thereby effectively reducing the impact of thermal deformation.

[0053] The relative position of the air guide pipe and the exhaust groove is determined by the fixing column to ensure the consistent state of the whole batch of welding products.

[0054] How to use: insert the plug into the exhaust groove, use the fixing column to fix the pipe interface on the thin-walled part, and use screws to press the pressing plate on the plug and the exhaust groove, so that the relative position of the tooling and the workpiece is completely fixed, thereby realizing the preparation before welding;

[0055] The plug can be changed according to the different shapes of the thin-walled parts to be welded, so as to achieve the adaptability of the tooling to the workpiece;

[0056] The fixed column sleeve plays a fixing role on the pipe joint. Its structure can be set in different shapes and specifications according to the shape and size of the pipe joint, and the middle can be used as a hollow part to reduce the weight of the tooling;

[0057] The pressure plate is fixed to the plug block by threaded connection. The screw connection is conducive to controlling its degree of compression, facilitating adjustment and control of the spacing between welded parts, thereby improving the accuracy of the workpiece after welding;

[0058] The welding and fixation between thin-walled tubes and thin-walled parts are achieved through tooling. Reasonable tooling structure can effectively reduce welding thermal deformation and ensure the consistent welding status of products in the same batch.

[0059] Pipe joint material model: steel plate GJB2295A-2006, 0Cr18Ni10Ti, δ0.5 GB / T708-20063

[0060] Thin-walled parts material model: steel plate GJB2295A-2006, 0Cr18Ni10Ti, δ0.5 GB / T708-20063

[0061] Used for argon arc welding, bench work, deburring, smooth transition and flaw detection.

[0062] Although the present invention has been disclosed as above in terms of preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A welding tool for pipe fittings and thin-walled parts, characterized in that: It comprises a connection unit (211) supported inside a pipe fitting (1) and a plug unit (212) supported inside a thin-walled member (111); when the plug unit (212) is connected to the connection unit (211), the portion to be welded of the pipe fitting (1) fits with the portion to be welded of the thin-walled member (111).

2. The pipe and thin-walled parts welding tool according to claim 1 is characterized in that: The plug unit (212) is provided with a connection groove (215), and the connection groove (215) is clamped with the lower end of the connection unit (211).

3. The welding tool for pipe fittings and thin-walled parts according to claim 2, characterized in that: The lower end of the connection unit (211) is a stepped first protrusion (2113), and the connection groove (215) is a stepped inverted cone-shaped first groove (114).

4. The pipe and thin-walled parts welding tool according to claim 3 is characterized in that: A threaded column (2114) is connected to the center of the first protrusion (2113), and a screw hole threadably matched with the threaded column (2114) is provided at the center of the groove (114).

5. The pipe and thin-walled parts welding tool according to claim 4, characterized in that: The upper end of the connection unit (211) is connected to a knob (2112), and the knob (2112) is connected to the threaded column (2114) via a connection rod that passes through the connection unit (211).

6. The pipe and thin-walled parts welding tool according to claim 1, characterized in that: The upper end of the plug unit (212) is connected to a second protrusion, and the lower end of the connection unit (211) is provided with a second groove for clamping with the block.

7. The pipe and thin-walled parts welding tool according to any one of claims 1 to 6, characterized in that: The connecting surfaces of the plug unit (212) and the connecting unit (211) are both provided with magnetic attraction units.

8. The pipe and thin-walled parts welding tool according to claim 7, characterized in that: A crimping unit (112) connected to the plug unit (212) is provided outside the thin-walled member (111), and the crimping unit (112) and the plug unit (212) are connected via a limiting pin (113).

9. The pipe and thin-walled parts welding tool according to claim 8, characterized in that: An annular groove is provided between the connection unit (211) and the plug unit (212), and the plug unit (212) is provided with an air passage (213) penetrating the annular groove.

10. The pipe and thin-walled parts welding tool according to claim 9, characterized in that: A blocking member (2115) is provided at the upper end of the connection unit (211) for blocking the pipe member (1) from sliding upward.

Images