A welding tongs

Abstract

The application discloses a welding butt joint clamp, relates to the technical field of clamps, and aims to solve the technical problem that it is difficult to guarantee the coaxiality of workpiece butt joint welding in the prior art. The welding butt joint clamp comprises a clamp body and a fixing portion. One end of the clamp body is provided with a clamp opening. The fixing portion is arranged on the clamp opening, and the fixing portion comprises two symmetrical scale blocks which are connected with the clamp body. An arc-shaped groove is arranged on the adjacent side wall of each of the two scale blocks. When the scale blocks are close to each other, the two arc-shaped grooves form a containing hole, so that the butt joint of multiple workpieces can be aligned and the workpieces can be clamped. Therefore, the welding butt joint clamp has the advantages of simple operation and high welding quality.

Description

Technical Field

[0001] This application relates to the technical field of pliers, and more specifically, to a welding clamping pliers. Background Technology

[0002] In existing technologies, various conveying and diversion devices are required in high-purity special gas delivery systems. These devices adhere to a "3D" design principle with minimal dead angles, necessitating the welding of numerous mini-adaptors at the connection points to facilitate the transition and connection of pipelines. When welding these mini-adaptors, the welding distance is extremely short, requiring technicians to use a spirit level to ensure the coaxiality of the joints. Furthermore, this welding operation demands a high level of skill from the workers. Therefore, current welding operations for adapters and related components are generally inefficient and costly. Summary of the Invention

[0003] The purpose of this application is to provide a welding clamp that can weld multiple workpieces at a preset angle, and can reduce the technical skill requirements of welding operators while ensuring the welding quality of the workpieces.

[0004] The embodiments of this application are implemented as follows:

[0005] This application provides a welding clamp, comprising: a clamp body and a fixing part.

[0006] The clamp body has a jaw at one end; a fixing part is located at the jaw, and the fixing part includes two symmetrically arranged scale blocks, both of which are connected to the clamp body; each of the two scale blocks has an arc-shaped groove on its adjacent side wall, and when the scale blocks approach each other, the two arc-shaped grooves form a receiving hole to align the joints of multiple workpieces and clamp the workpieces.

[0007] In one embodiment, one end of the fixing part is provided with a welding port, which communicates with the receiving hole.

[0008] In one embodiment, each scale block has a reference surface that is perpendicular to the axis of the receiving hole, and angle scales are provided on the reference surface.

[0009] In one embodiment, the reference surface includes a first reference surface and a second reference surface, which are disposed on opposite sides of each scale block.

[0010] In one embodiment, the clamp body includes a linkage assembly and a clamping portion.

[0011] The linkage assembly includes a first linkage and a second linkage; the clamping part includes a fixed clamp block and a movable clamp block; the fixed clamp block is connected to the first linkage, the movable clamp block is rotatably disposed on the first linkage, and the second linkage is rotatably disposed on the movable clamp block; a jaw is formed between the adjacent sidewalls of the movable clamp block and the fixed clamp block; two scale blocks are respectively connected to the movable clamp block and the fixed clamp block; the second linkage drives the movable clamp block to bring the two scale blocks closer to each other.

[0012] In one embodiment, the linkage assembly further includes a first elastic element, one end of which is connected to a movable clamping block, and the other end of which is connected to a first linkage; when the two scale blocks are close together, the first elastic element is stretched and undergoes elastic deformation.

[0013] In one embodiment, the linkage assembly further includes a strut, the first linkage is provided with a strip-shaped mounting groove, one end of the strut is movably disposed in the strip-shaped mounting groove, and the other end of the strut is rotatably disposed on the second linkage.

[0014] In one embodiment, the linkage assembly further includes an adjusting screw, and the first linkage is also provided with an adjusting hole that communicates with a strip mounting groove. One end of the adjusting screw extends into the adjusting hole and abuts against the end face of the support rod.

[0015] In one embodiment, one end of the adjusting screw that extends into the first connecting rod abuts against the support rod via a second elastic element.

[0016] In one embodiment, the linkage assembly further includes a pressure rod, one end of which is connected to the second linkage.

[0017] The advantages of this application compared to existing technologies are as follows: By setting an arc-shaped groove on the scale block of the fixing part, this application achieves the clamping and alignment of multiple workpieces to be welded in subsequent welding operations; by setting angle scales on the scale block, the reference positions of multiple workpieces are made to form a preset angle after welding. This application ensures the welding quality of the welded parts while simplifying operation, avoiding material waste and increased costs caused by substandard welding quality, and greatly reducing the technical requirements for welding operators and improving the efficiency of welding operations. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a welding clamp according to an embodiment of this application;

[0020] Figure 2 for Figure 1 The enlarged view of point A shown in the image;

[0021] Figure 3 This is a schematic diagram of the structure of a welding clamp according to an embodiment of this application;

[0022] Figure 4 This is an exploded view of a welding clamp according to an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the structure of a welding clamp according to an embodiment of this application.

[0024] Icons: 1-Welding clamping pliers; 2-Pliers body; 20-Jaws; 200-Serrated structure; 21-Clamping part; 22-Link assembly; 211-Fixed clamp block; 212-Modible clamp block; 221-First link; 222-Second link; 223-First elastic element; 224-Support rod; 225-Adjusting screw; 226-Pressure rod; 2121-First rotating shaft; 2122-Second rotating hole; 2210-Strip mounting groove; 2222-Second rotating shaft; 2221-Third fixed shaft; 2211-First rotating hole; 22 12-Adjusting hole; 2213-First fixed shaft; 2214-Second fixed shaft; 2251-Second elastic element; 3-Fixing part; 30-Scale block; 300-Reference surface; 3001-First reference surface; 3002-Second reference surface; 301-Angle scale; 302-Angle ruler; 310-Arc-shaped groove; 31-Receiving hole; 32-Weld joint; 4-Workpiece; 41-First workpiece; 42-Second workpiece; 410-First mating joint; 420-Second mating joint; 411-First reference part; 421-Second reference part. Detailed Implementation

[0025] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.

[0029] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.

[0030] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the overall structure of a welding clamp 1 according to an embodiment of this application. The welding clamp 1 includes a clamp body 2 and a fixing part 3. One end of the clamp body 2 has a jaw 20; the fixing part 3 is disposed on the jaw 20 and includes two scale blocks 30, which are symmetrically arranged and both connected to the clamp body 2.

[0031] In one embodiment, the two scale blocks 30 of the fixing part 3 and the clamp body 2 can be integrally formed by welding, or they can be fixed together by means of buckles, screws or the like.

[0032] The clamp body 2 includes a clamping part 21 and a connecting rod assembly 22. The connecting rod assembly 22 includes a first connecting rod 221 and a second connecting rod 222. The clamping part 21 includes a fixed clamp block 211 and a movable clamp block 212. The fixed clamp block 211 is connected to the first connecting rod 221, and the movable clamp block 212 is connected to the second connecting rod 222 and the first connecting rod 221. The movable clamp block 212 can be driven by the second connecting rod 222 to gradually approach the fixed clamp block 211.

[0033] The welding clamp 1 provided in this application is mainly used to clamp workpiece 4 during welding. In actual gas transmission equipment, workpiece 4 is mainly an adapter for connecting pipelines or equipment. The fixing part 3 of the welding clamp 1 ensures the coaxiality of the butt joint position of the workpiece 4 (adapter) while also achieving a required preset angle between the corresponding reference positions of multiple workpieces 4 (adapters) after welding. The specific structure to achieve the above functions is as follows:

[0034] Please refer to Figure 2 , Figure 2 for Figure 1 A magnified view of a portion at point A is shown in the image. Figure 2 As shown, each of the two scale blocks 30 of the fixing part 3 is provided with an arc-shaped groove 310 on the adjacent side wall. When the two scale blocks 30 approach each other, the two arc-shaped grooves 310 form a receiving hole 31. The receiving hole 31 is used to clamp the docking position of the workpiece 4 to facilitate subsequent welding.

[0035] One end of the fixing part 3 is provided with a welding port 32, which is connected to the receiving hole 31. In actual operation, the operator puts the welding butt joint parts of multiple workpieces 4 into the receiving hole 31 and clamps the multiple workpieces 4 through the arc-shaped groove 310. Then, the operator uses a spot welding machine (or other welding tool) to weld the butt joint parts of the workpieces 4 through the welding port 32 from the outside of the welding butt joint device.

[0036] Each scale block 30 has a reference surface 300, which is perpendicular to the axis of the receiving hole 31. Angle graduations 301 are provided on the reference surface 300. When two scale blocks 30 are brought close together to form the receiving hole 31, the angle graduations 301 on the two reference surfaces 300 combine to form a fan-shaped angle ruler 302. This angle ruler 302 is mainly used to adjust the orientation of the workpiece 4 after it is placed in the machine to align with the preset angle graduations 301.

[0037] In the embodiments of this application, the angle scale 301 can be evenly distributed on the reference surface 300 by various methods such as laser engraving, digital punching, screen printing, and pasting. The angle scale 301 can be fixed in 15-degree units, or other angle sizes can be set as fixed units as needed.

[0038] A jaw 20 is formed between the adjacent sidewalls of the fixed jaw block 211 and the movable jaw block 212. In one embodiment of this application, a serrated structure 200 is provided on the adjacent sidewalls of the fixed jaw block 211 and the movable jaw block 212, and a fixing part 3 is provided at the end of the jaw 20. In other embodiments of this application, the adjacent sidewalls of the fixed jaw block 211 and the movable jaw block 212 can be smooth planes or arc-shaped surfaces, and two scale blocks 30 are connected only at the end of the jaw 20.

[0039] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the welding clamp 1 shown in one embodiment of this application. Please refer to... Figure 2 , Figure 3As shown, the receiving hole 31 of the fixing part 3 is used to align the welding positions of multiple workpieces 4 (e.g., the butt joints on an adapter) and clamp the workpieces 4. Generally, there are two workpieces 4 to be aligned and clamped for subsequent welding; if it is necessary to weld a simple part with the same outer diameter between the welding positions of two workpieces 4, then there are three workpieces 4 to be welded (aligned and clamped). Taking two workpieces 4 to be welded as an example, in actual operation, the operator needs to place the first butt joint 410 of the first workpiece 41 and the second butt joint 420 of the second workpiece 42 between the arc-shaped grooves 310 of the two scale blocks 30, and then apply force to the second connecting rod 222 to bring the two scale blocks 30 closer together. The receiving hole 31 formed by the arc-shaped groove 310 aligns and clamps the first butt joint 410 and the second butt joint 420, so that the operator can use welding tools to weld the exposed butt joint of the first butt joint 410 and the second butt joint 420 from the welding port 32.

[0040] The arc radius of the arc groove 310 is used to ensure the coaxiality of the joints of multiple workpieces 4 during welding. The arc radius of the arc groove 310 is designed in various ways depending on the outer diameter of the joint of the workpiece 4. For example, based on the outer diameter of the joint of commonly used adapters, the specific size of the arc radius can be set to 1 / 4 inch, 3 / 8 inch, or 1 / 2 inch to ensure a better fit to the outer wall of the joint when clamping the joint of the workpiece 4, thereby achieving stability of the workpiece 4 during the subsequent welding process and ensuring the coaxiality of the joints.

[0041] Please combine Figure 2 , Figure 3 As shown, the reference surface 300 on the scale block 30 includes a first reference surface 3001 and a second reference surface 3002. Both the first reference surface 3001 and the second reference surface 3002 are perpendicular to the axis of the receiving hole 31 and are located on opposite sides of each scale block 30. The first reference surfaces 3001 of the two scale blocks 30 face the same direction, and the second reference surfaces 3002 of the two scale blocks 30 face another same direction. In one embodiment of this application, angle scales 301 can be provided on both the first reference surface 3001 and the second reference surface 3002, so that when the two scale blocks 30 are close to each other, the angle scales 301 on the corresponding first reference surface 3001 can be combined to form a fan-shaped angle ruler 302, and the angle scales 301 on the corresponding second reference surfaces 3002 of the two scale blocks 30 can be combined to form a fan-shaped angle ruler 302. In each scale block 30, the angle scale 301 of the first reference surface 3001 and the angle scale 301 of the second reference surface 3002 are projected to completely coincide along the axial direction of the receiving hole 31, so that when the workpiece 4 to be welded is aligned with the angle scale 301, the reference degree orientation is consistent.

[0042] During an operation, standard lines can be engraved on the first workpiece 41 and the second workpiece 42. The axis of the first reference part 411 on the first workpiece 41 has a fixed first preset angle with the standard line, and the axis of the second reference part 421 on the second workpiece 42 has a fixed second preset angle with the standard line. When clamping the first connector 410 and the second connector 420 through the receiving hole 31, the operator adjusts the first workpiece 41 based on the first preset angle, the second preset angle, and the preset angle formed by the axes of the first reference part 411 and the second reference part 421 after welding. The rotation of workpiece 41 and the second workpiece 42 is such that the standard line of the first workpiece 41 is aligned with the corresponding angle scale 301 on the first reference surface 3001, and the standard line on the second workpiece 42 is aligned with the corresponding angle scale 301 on the second reference surface 3002. After alignment, they are clamped together. Thus, after the butt joint of the two workpieces 4 is welded, the conversion angle required for the connection between various devices in actual gas transportation can be formed between the first reference part 411 and the second reference part 421. The conversion angle is the preset angle formed by the axes of the first reference part 411 and the second reference part 421 after welding.

[0043] In one embodiment of this application, the two scale blocks 30 are identical; in other embodiments of this application, the two scale blocks 30 can be set to different shapes or sizes according to the needs of actual welding operations (for example, the thicknesses of the two scale blocks 30 are different). Different styles of scale blocks 30 need to ensure that the arc radii of the two arc grooves 310 that hold the butt joint are consistent, aligned and clamped, and that the adjacent sidewalls of the scale blocks 30 do not interfere with each other during the welding process, that the scale blocks 30 do not interfere with the workpiece 4, and that the angle gauge 302 of the scale blocks 30 is used normally, so as to further ensure normal welding operations and welding quality.

[0044] Please refer to Figure 4 , Figure 4 This is an exploded view of the welding clamp 1 shown in one embodiment of this application; please refer to... Figure 5 , Figure 5 This is a schematic diagram of the structure of a welding clamp 1 shown in one embodiment of this application.

[0045] Please combine Figure 3 , Figure 4 and Figure 5As shown, the movable clamp block 212 is provided with a first rotating shaft 2121, and the first connecting rod 221 is provided with a first rotating hole 2211. The movable clamp block 212 is rotatably mounted on the first connecting rod 221 through the connection between the first rotating shaft 2121 and the first rotating hole 2211. The second connecting rod 222 is provided with a second rotating shaft 2222, and the movable clamp block 212 is provided with a second rotating hole 2122. The movable clamp block 212 extends into the second connecting rod 222 from one end of the second connecting rod 222, and is connected to the second connecting rod 222 through the second rotating shaft 2222, the first rotating shaft 2121, and the second connecting rod 222. The second connecting rod 222 is rotatably mounted on the movable clamp block 212. The fixed clamp block 211 is inserted into the first connecting rod 221 from one end of the first connecting rod 221, and is fixed on the first connecting rod 221 through the first fixed shaft 2213 and the second fixed shaft 2214.

[0046] The linkage assembly 22 also includes a pressure rod 226, one end of which is fixedly connected to the second linkage 222 via a third fixed shaft 2221. The pressure rod 226 is held and applied by the operator to facilitate easier movement of the scale block 30. The pressure rod 226 can be fixed to the second linkage 222 via the third fixed shaft 2221 after forming the required angle with it. In other embodiments of this application, the first fixed shaft 2213, the second fixed shaft 2214, and the third fixed shaft 2221 can be made of various general-purpose fasteners such as rivets.

[0047] Linkage assembly 22 also includes strut 224, combined with Figure 5 As shown, a strip-shaped mounting groove 2210 is provided on the side wall of the first connecting rod 221, one end of the support rod 224 is movably disposed in the strip-shaped mounting groove 2210, and the other end of the support rod 224 is rotatably disposed on the second connecting rod 222.

[0048] In one embodiment, the connecting rod assembly 22 further includes an adjusting screw 225, and the other end of the first connecting rod 221 is provided with an adjusting hole 2212. The adjusting hole 2212 communicates with the strip mounting groove 2210, and one end of the adjusting screw 225 extends into the adjusting hole 2212 and abuts against the end face of the support rod 224.

[0049] In one embodiment, one end of the adjusting screw 225 extending into the first connecting rod 221 can also abut against the support rod 224 via a second elastic element 2251 to reduce wear on the support rod 224. One end of the second elastic element 2251 is connected to the adjusting screw 225, and the other end abuts against the end face of the support rod 224. In one embodiment of this application, the first elastic element 223 can be a spring, with one end of the spring sleeved on the outside of the adjusting screw 225 and connected to the adjusting screw 225, or one end of the spring directly abutting against the end face of the adjusting screw 225; the other end of the spring abuts against the end face of the support rod 224. In other embodiments, the second elastic element 2251 can be an elastic element such as a rubber strip.

[0050] The linkage assembly 22 also includes a first elastic element 223. One end of the first elastic element 223 is connected to the movable clamp block 212, and the other end is connected to the first connecting rod 221. When the operator applies force to the pressure rod 226 to bring the two scale blocks 30 closer together, the first elastic element 223 is stretched and undergoes elastic deformation. In one embodiment of this application, the first elastic element 223 may be a spring; in other embodiments of this application, the first elastic element 223 may be other elastic elements such as rubber strips. When the operator releases the pressure rod 226 and no longer applies force to it, the first elastic element 223 restores its deformation and pulls the movable clamp block 212 back to its original position, away from the fixed clamp block 211, so that the two scale blocks 30 are moved away from each other.

[0051] Please combine Figures 1 to 5 During the operation, before welding, the operator first loosens the adjusting screw 225 to its maximum position, aligns the butt joint of the first workpiece 41 with the butt joint of the second workpiece 42, and places them between the arc-shaped grooves 310 of the two scale blocks 30. Then, force is applied to the pressure rod 226 to bring the two scale blocks 30 closer together, and the arc-shaped grooves 310 clamp the butt joint of the workpiece 4. While maintaining the clamping action and applying force, the operator screws the adjusting screw 225 to continuously press against the end face of the support rod 224, and moves the end of the support rod 224 adjacent to the adjusting screw 225 within the strip mounting groove 2210 until the adjusting screw 225 is no longer easy to turn.

[0052] At this point, the operator can release the pressure rod 226 and adjust the orientation of the two workpieces 4 according to the welding requirements, so that the standard line of the first workpiece 41 is aligned with the corresponding angle scale 301 on the first reference surface 3001, and the standard line of the second workpiece 42 is aligned with the corresponding angle scale 301 on the second reference surface 3002. This way, after welding the workpieces 4, the first reference part 411 of the first workpiece 41 and the second reference part 421 of the second workpiece 42 can form the conversion angle required for connecting the gas conveying equipment. After aligning the scales, the operator can again turn the adjusting screw 225 to adjust the clamping width of the receiving hole 31. Then, force is applied to the pressure rod 226 again. The second connecting rod 222 moves under the support and rotation of the support rod 224. The movable clamp block 212 is pushed by the second connecting rod 222 and rotates around the first rotating hole 2211 so that the movable clamp block 212 and the fixed clamp block 211 move closer to each other. The arc-shaped groove 310 of the scale block 30 clamps the joint of the two workpieces 4. The operator uses welding tools to perform welding operations on the joint of the workpieces from the welding port 32.

[0053] During the above operation, if the operator feels that the clamping of the connector is not tight enough, the adjusting screw 225 can be turned in or out appropriately to change the clamping degree.

[0054] This application provides an arc-shaped groove 310 on the scale block 30 of the fixing part 3, thereby forming a receiving hole 31 when the scale blocks 30 approach each other. This allows multiple workpieces 4 to be welded to be clamped and aligned in subsequent welding operations by the receiving hole 31, ensuring the coaxiality of the welded joint. This application also provides an angle scale 301 on the scale block 30, which fixes the reference position (e.g., the reference part of the workpiece 4) of multiple workpieces 4 and allows for angle conversion between the reference positions after welding to adapt to equipment connection requirements. This application ensures the welding quality of the welded parts while simplifying operation, reduces the technical requirements for welding operators, and greatly improves the efficiency of welding operations.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A welding alignment tongs characterized by, The utility model relates to a kind of welding fixture, including: Pliers body, one end of the pliers body has jaw; Fixed part, the fixed part is located in the jaw, the fixed part includes two symmetrical scales, two The scale is connected with the pliers body; Two adjacent side walls of the scale are each provided with an arc-shaped groove, when the scale is close to each other, two The arc-shaped grooves form a receiving hole, to align the butt joint of multiple workpieces and clamp the workpiece; One end of the fixed part is provided with a welding interface, and the welding interface is communicated with the receiving hole; Each scale has a reference surface, and the reference surface is perpendicular to the axis of the receiving hole, and an angle scale is provided on the reference surface.

2. The welding alignment clamp of claim 1, wherein, The reference surface includes a first reference surface and a second reference surface, and the first reference surface and the second reference surface are provided on opposite sides of each scale.

3. The welding alignment tool of claim 1, wherein, The pliers body includes: Linkage assembly, including a first link and a second link; Clamping part, the clamping part includes a fixed jaw and a movable jaw; The fixed jaw is connected with the first link, the movable jaw is rotatably provided on the first link, and the second link is rotatably provided on the movable jaw; The adjacent side walls between the movable jaw and the fixed jaw form the jaw; Two scales are connected with the movable jaw and the fixed jaw respectively; The second link drives the movable jaw to make two scales close to each other.

4. The welding alignment tool of claim 3, wherein, The linkage assembly further includes: One end of the first elastic member is connected with the movable jaw, and the other end of the first elastic member is connected with the first link; When two scales are close, the first elastic member is elongated and elastically deformed.

5. The welding alignment tool of claim 3, wherein, The linkage assembly further includes: Supporting rod, the first link is provided with a strip-shaped mounting groove, one end of the supporting rod is movably provided in the strip-shaped mounting groove, and the other end of the supporting rod is rotatably provided on the second link.

6. The welding alignment tool of claim 5, wherein, The linkage assembly further includes: Adjusting screw, the first link is further provided with an adjusting hole, the adjusting hole is communicated with the strip-shaped mounting groove, one end of the adjusting screw extends into the adjusting hole and abuts on the end face of the supporting rod.

7. The welding alignment tool of claim 6, wherein, The end of the adjusting screw extending into the first link abuts on the supporting rod through the second elastic member.

8. The welding alignment tool of claim 3, wherein, The linkage assembly further includes a pressing rod, one end of the pressing rod is connected with the second link.

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