Welding clamping device and welding system

Abstract

The utility model relates to welding clamping device and welding system, welding clamping device includes two first clamping unit, second clamping unit and elastic clamping unit. Its advantage lies in, compared with the traditional positioning clamping pipe and easy welding deformation leading to positioning error, the rectangular part of workpiece is positioned and clamped, and the positioning error caused by welding deformation is reduced, compared with the traditional clamping pipe and easy welding deformation leading to positioning error, the rectangular part of workpiece is positioned and clamped, and displacement deviation does not appear when workpiece rotates, elastic buffer clamping is carried out by using elastic clamping unit, and it is avoided that workpiece is damaged by excessive clamping due to accident.

Description

Technical Field

[0001] This utility model relates to the field of component welding technology, particularly the welding of overcurrent switch components, and relates to a welding clamping device and welding system. Background Technology

[0002] In fields such as machinery manufacturing, pipeline engineering, and automotive parts production, welding of circular workpieces (such as steel pipes, shaft parts, and circular flanges) is an extremely common processing procedure. The welding quality directly affects the structural strength, sealing performance, and service life of the product. To ensure the stability of the workpiece during the welding process and to ensure accurate weld positioning and uniform weld formation, it is usually necessary to use fixtures to position and hold the circular workpiece. Currently, welding fixtures for circular workpieces in the industry generally use the cylindrical part of the workpiece as the core positioning and clamping point. Through structures such as three-jaw chucks, V-blocks, and arc-shaped chucks, clamping force is applied radially from the cylindrical surface to fix the workpiece in a preset welding position before welding. However, when welding circular workpieces with special structures (such as circular pipe fittings with flow switches), the positioning and clamping methods of traditional fixtures reveal significant limitations: In addition to the main cylindrical structure, these workpieces also integrate a square block component with a flow switch. To ensure the installation accuracy and functional stability of the flow switch, the square block must be pressed against the end face of the three-jaw chuck during welding. The rigid contact between the square block and the chuck assists in positioning, limiting the axial and circumferential displacement of the workpiece. However, even with the aforementioned auxiliary positioning methods, traditional fixtures still have unresolved problems in actual welding processes, resulting in welding quality that is difficult to meet standards. The specific defects are as follows: First, traditional positioning and clamping methods are prone to positioning errors due to welding deformation. During welding, the high temperature generated by the electric arc causes a rapid increase in the temperature of local areas of the workpiece. The cylindrical part of a circular workpiece is mostly made of metal, which undergoes thermal expansion and contraction upon heating. Although the fixture applies clamping force to the workpiece, the thermal deformation of the metal caused by the high temperature often exceeds the constraint capacity of the fixture, resulting in slight radial shrinkage, axial elongation, or bending deformation of the cylindrical part. This deformation may not be obvious after a single weld, but when the other side of the workpiece needs to be processed (such as the continuation welding of symmetrical welds or circumferential welds), the deformed cylindrical surface can no longer completely fit with the positioning reference of the fixture. The cylindrical contour that originally matched the positioning surface of the fixture deviates, causing the workpiece to be unable to be accurately reset to the initial welding position. The butt joint position of the weld becomes misaligned (such as misalignment or uneven gaps), which seriously affects the strength and sealing of the weld joint. For example, when welding circular pipe fittings with flow switches, if the cylindrical part has a radial deviation of 0.5 to 1 mm due to welding deformation, it will cause a gap between the mating surface of the square block and the three-jaw chuck, further aggravating the positioning inaccuracy, causing the weld seam of subsequent welding to deviate from the preset trajectory, and even requiring rework and correction, thus reducing production efficiency. Secondly, traditional clamping methods are prone to displacement due to workpiece rotation. The cylindrical surface of a round workpiece is a smooth curved surface. When traditional clamps achieve fixation through radial clamping force, the friction between the clamping point and the cylindrical surface is the main force resisting workpiece rotation. However, during welding, multiple factors can disrupt this balance: on the one hand, the movement of the welding torch and the feeding of the welding wire may generate slight lateral impact forces on the workpiece; on the other hand, uneven heating of the workpiece leading to localized stress release can cause a slight torsional tendency; furthermore, when adjusting the welding angle (such as when welding circumferential welds), a slight loosening of the clamping force, or a decrease in friction on the cylindrical surface due to oil or oxide scale, can cause the workpiece to unconsciously rotate around its own axis. This rotational displacement is often difficult to detect, but it directly leads to the weld position deviating from the design reference. For example, a weld that should be symmetrical along the workpiece axis may become skewed, or its relative position to the square block of the overcurrent switch may not meet assembly requirements, ultimately preventing the workpiece from being installed and used properly. Especially in mass production, the randomness of this rotational offset can cause fluctuations in product quality and significantly increase the defect rate. In summary, existing welding fixtures for circular workpieces have significant shortcomings in positioning and clamping stability and anti-interference capabilities. They struggle to address positioning errors caused by welding deformation and workpiece rotation-induced offset problems, thus failing to meet the demands of high-precision welding. Therefore, there is an urgent need for a new type of welding fixture that can effectively suppress welding deformation and prevent workpiece rotation offset, thereby improving the welding quality and production efficiency of circular workpieces.

[0003] In summary, no effective solutions have yet been proposed for existing problems such as positioning errors caused by welding deformation and offset caused by rotation. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a welding clamping device and welding system to solve problems such as positioning errors caused by welding deformation and offset due to rotation in related technologies.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: In a first aspect, a welding clamping device is provided, comprising: Two first clamping units are arranged opposite to each other along a first direction and extend along the first direction, and are used to reciprocate along the first direction to clamp opposite first and second sides of the workpiece to be welded and to release the welded workpiece. The second clamping unit is disposed above or below the first clamping unit and extends along the second direction, and is used to clamp the third side of the workpiece to be welded and to release the welded workpiece. An elastic clamping unit is disposed opposite to and extends along the second clamping unit along the second direction, and is used to reciprocate along the second direction to clamp the fourth side of the workpiece to be welded, which is opposite to the third side, and to release the welded workpiece. Wherein, the second direction is perpendicular to the first direction, the first side and the second side are two sides of the workpiece to be welded that are symmetrical along the first direction, and the third side and the fourth side are two sides of the workpiece to be welded that are symmetrical along the second direction. In the initial state of the welding clamping device, the distance between the end of the elastic clamping unit and the end of the second clamping unit is different from the distance between the ends of the two first clamping units.

[0006] In some embodiments, the first clamping unit includes: A first clamping element extends along a first direction and is used to reciprocate along the first direction to clamp a first side or a second side of a workpiece to be welded and to release a welded workpiece.

[0007] In some embodiments, the second clamping unit includes: The second clamping element is disposed above or below the first clamping unit and extends along the second direction, and is disposed opposite to the elastic clamping unit along the second direction, for clamping the third side of the workpiece to be welded and releasing the welded workpiece.

[0008] In some embodiments, the resilient clamping unit includes: A first elastic clamping element is disposed opposite to and extends along the second direction from the second clamping unit, and is used to reciprocate along the second direction to clamp the fourth side of the workpiece to be welded and release the welded workpiece. The second elastic clamping element is disposed opposite to the first elastic clamping element along the second direction and extends along the second direction, and is used for reciprocating motion along the second direction; An elastic element is disposed between the first elastic clamping element and the second elastic clamping element, and is connected to the first elastic clamping element and the second elastic clamping element respectively.

[0009] In some of these embodiments, it also includes: A first guide unit is slidably connected to each of the two first clamping units, and is used to restrict the movement direction of the two first clamping units.

[0010] In some embodiments, the first guiding unit includes: A first substrate element is disposed above or below the two first clamping units; Two first guide elements are respectively disposed on the side of the first substrate element. The two first guide elements are disposed opposite to each other along the first direction and extend along the first direction, and are respectively slidably connected to the two first clamping units to limit the movement direction of the first clamping units. The third penetrating element is disposed through the center of the first substrate element.

[0011] In some of these embodiments, it also includes: The second guide unit is connected to the second clamping unit and the elastic clamping unit respectively, and is used to restrict the movement direction of the second clamping unit and the elastic clamping unit.

[0012] In some embodiments, the second guiding unit includes: The second substrate element is disposed above or below the second clamping unit and the elastic clamping unit; The second guide element is disposed on the side of the second substrate element and extends along the second direction, and is slidably connected to the second clamping unit to limit the movement direction of the second clamping unit. A third guide element is disposed on the side of the second substrate element and extends along the second direction, and is disposed opposite to the second guide element along the second direction, and is slidably connected to the elastic clamping unit to limit the movement direction of the elastic clamping unit. A fourth through element is disposed through the center of the second substrate element.

[0013] In some of these embodiments, it also includes: The first rotating unit is movably connected to the two first clamping units respectively, and is used to rotate to drive the two first clamping units to move towards each other or away from each other along a first direction.

[0014] In some embodiments, the first clamping unit further includes: A plurality of first sliding elements are spaced apart on the side of the first clamping unit along the length direction of the first clamping unit and are slidably connected to the first rotating unit respectively, for cooperating with the first rotating unit to make the first clamping unit reciprocate along the first direction.

[0015] In some embodiments, the first rotating unit includes: A first base element is disposed above or below the two first clamping units and is used for rotation; The first vortex element is disposed on the side of the first base element and is slidably connected to the two first clamping units respectively, and is used to drive the two first clamping units to move towards each other or away from each other along the first direction under the action of the first base element. The first penetrating element is disposed through the center of the first base element.

[0016] In some of these embodiments, it also includes: The second rotating unit is movably connected to the second clamping unit and the elastic clamping unit, respectively, and is used to rotate to drive the elastic clamping unit to reciprocate along the second direction.

[0017] In some embodiments, the second clamping unit further includes: A plurality of second sliding elements are provided at intervals along the length direction of the second clamping unit on the side of the second clamping unit and are slidably connected to the second rotating unit for cooperating with the second rotating unit.

[0018] In some embodiments, the resilient clamping unit further includes: A plurality of third sliding elements are spaced apart along the length direction of the elastic clamping unit at the first end of the elastic clamping unit and are respectively slidably connected to the second rotating unit for cooperating with the second rotating unit to make the first end of the elastic clamping unit reciprocate along the second direction; A plurality of fourth sliding elements are spaced apart along the length direction of the elastic clamping unit at the second end of the elastic clamping unit and are respectively slidably connected to the second rotating unit for cooperating with the second rotating unit to make the second end of the elastic clamping unit reciprocate along the second direction.

[0019] In some embodiments, the second rotating unit includes: The second base element is disposed above or below the second clamping unit and the elastic clamping unit, and is used for rotation; The second vortex element is disposed on the side of the second base element and is slidably connected to the second clamping unit and the elastic clamping unit respectively, and is used to drive the elastic clamping unit to reciprocate along the second direction under the action of the second base element; The second through element is disposed through the center of the second base element.

[0020] In some of these embodiments, it also includes: A first cover plate unit is disposed on the side of the first guide unit and connected to the first guide unit, for covering the two first clamping units.

[0021] In some embodiments, the first guiding unit further includes: A plurality of first connecting elements are distributed on the side of the first guide unit and are respectively connected to the first cover plate unit.

[0022] In some embodiments, the first cover plate unit includes: A first cover plate element is disposed on the side of the first guide unit; The fifth penetrating element is disposed through the center of the first cover plate element; A plurality of third connecting elements are distributed on the side of the first cover plate element and are respectively connected to the first guide unit.

[0023] In some of these embodiments, it also includes: The second cover plate unit is disposed on the side of the second guide unit and connected to the second guide unit, and is used to cover the second clamping unit and the elastic clamping unit.

[0024] In some embodiments, the second guiding unit further includes; A plurality of second connecting elements are distributed on the side of the second guide unit and are respectively connected to the second cover plate unit.

[0025] In some embodiments, the second cover plate unit includes: The second cover plate element is disposed on the side of the second guide unit; The sixth through element is disposed through the center of the second cover element; A plurality of fourth connecting elements are distributed on the side of the second cover plate element and are respectively connected to the second guide unit.

[0026] Secondly, a welding system is provided, comprising: The welding clamping device as described in the first aspect.

[0027] The present invention adopts the above technical solution and has the following technical effects compared with the prior art: 1) Compared with traditional positioning and clamping of pipe fittings, which is prone to welding deformation and positioning errors, positioning and clamping the rectangular part of the workpiece reduces positioning errors caused by welding deformation. 2) Compared with traditional clamping of pipe fittings, which is prone to displacement due to rotation during welding, positioning and clamping the rectangular part of the workpiece will not cause displacement deviation when the workpiece rotates. 3) Use elastic clamping units for elastic buffer clamping to avoid damage to the workpiece due to over-clamping caused by accidents. Attached Figure Description

[0028] Figure 1 This is a schematic diagram (a) of a welding clamping device according to an embodiment of the present utility model; Figure 2 This is a schematic diagram (II) of the welding clamping device according to an embodiment of the present utility model; Figure 3 This is a schematic diagram (III) of the welding clamping device according to an embodiment of the present utility model; Figure 4 yes Figure 3 A cross-sectional view along the first direction; Figure 5 yes Figure 3 A cross-sectional view along the second direction; Figure 6 This is a schematic diagram of the first clamping unit according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of the second clamping unit according to an embodiment of the present utility model; Figure 8This is a schematic diagram of an elastic clamping unit according to an embodiment of the present utility model; Figure 9 This is a schematic diagram of the first rotating unit according to an embodiment of the present utility model; Figure 10 This is a schematic diagram of the second rotating unit according to an embodiment of the present utility model; Figure 11 This is a schematic diagram of the first guide unit according to an embodiment of the present utility model; Figure 12 This is a schematic diagram of the second guide unit according to an embodiment of the present utility model; Figure 13 This is a schematic diagram of the first cover plate unit according to an embodiment of the present utility model; Figure 14 This is a schematic diagram of the second cover plate unit according to an embodiment of the present utility model.

[0029] The reference numerals in the accompanying drawings are: 100, first clamping unit; 101, first clamping element; 102, first sliding element; 200, Second clamping unit; 201, Second clamping element; 202, Second sliding element; 300, elastic clamping unit; 301, first elastic clamping element; 302, second elastic clamping element; 303, elastic element; 400. First rotating unit; 401. First base element; 402. First vortex element; 403. First through element; 500, Second rotating unit; 501, Second base element; 502, Second vortex element; 503, Second through element; 600, First guiding unit; 601, First substrate element; 602, First guiding element; 603, Third through element; 604, First connecting element; 700, Second guiding unit; 701, Second substrate element; 702, Second guiding element; 703, Third guiding element; 704, Fourth through element; 705, Second connecting element; 800, First cover plate unit; 801, First cover plate element; 802, Fifth through element; 803, Third connecting element; 900, Second cover plate unit; 901, Second cover plate element; 902, Sixth through element; 903, Fourth connecting element. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0033] Example 1 An illustrative embodiment of this utility model, such as Figures 1-5 As shown, a welding clamping device includes two first clamping units 100, a second clamping unit 200, and an elastic clamping unit 300. The two first clamping units 100 are arranged opposite to each other and extend along a first direction, and are used to reciprocate along the first direction to clamp opposing first and second sides of a workpiece to be welded and to release the welded workpiece. The second clamping unit 200 is disposed above or below the first clamping units 100 and extends along a second direction, and is used to clamp a third side of the workpiece to be welded and to release the welded workpiece. The elastic clamping unit 300 is arranged opposite to the second clamping unit 200 along the second direction and extends along the second direction, and is used to reciprocate along the second direction to clamp a fourth side of the workpiece to be welded opposite to the third side and to release the welded workpiece.

[0034] In this invention, the workpiece is an overcurrent switch.

[0035] In this invention, the welding clamping device and the welding device are used together to form a welding system. The welding device is a conventional technique in this field and will not be described in detail here.

[0036] Wherein, the second direction is perpendicular to the first direction, the first side and the second side are two sides of the workpiece to be welded that are symmetrical along the first direction, and the third side and the fourth side are two sides of the workpiece to be welded that are symmetrical along the second direction.

[0037] For example, the first direction is the X direction of the horizontal plane, and the second direction is the Y direction of the horizontal plane.

[0038] The workpiece has six sides: the front side, the rear side, the left side, the right side, the top side, and the bottom side. For example, if the workpiece is placed horizontally, the first side is the left side, the second side is the right side, the third side is the bottom side, and the fourth side is the top side. Other configurations can be deduced similarly.

[0039] In this invention, the cross-section of a portion of the workpiece is rectangular, which facilitates the clamping of the four sides of the rectangular cover by the two first clamping units 100, the second clamping unit 200, and the elastic clamping unit 300.

[0040] In the initial state of the welding clamping device, the distance between the end of the elastic clamping unit 300 and the end of the second clamping unit 200 is different from the distance between the ends of the two first clamping units 100.

[0041] The initial state refers to the state in which the welding clamping device has not yet clamped the workpiece.

[0042] In the initial state, the two first clamping units 100, the second clamping unit 200, and the elastic clamping unit 300 are eccentrically arranged. Specifically, the two adjacent ends of the two first clamping units 100 form a virtual first line segment, and the two adjacent ends of the second clamping unit 200 and the elastic clamping unit 300 form a virtual second line segment. The center of the first line segment does not coincide with the center of the second line segment.

[0043] In some of these embodiments, the center of the first line segment is near the end of the second clamping unit 200.

[0044] In this utility model, the working process of the welding clamping device is as follows: The workpiece to be welded is placed in the welding clamping device, and the third side of the workpiece abuts against the second clamping unit 200. The elastic clamping unit 300 moves, gradually approaches the workpiece, and abuts against the fourth side of the workpiece; The two first clamping units 100 move and gradually approach the workpiece, and respectively abut against the first side and the second side of the workpiece to complete the clamping process; After the clamping process is completed, the welding process is performed. After the welding process is completed, the two first clamping units 100 move away from the workpiece and release the first and second sides of the workpiece. The elastic clamping unit 300 moves, gradually moving away from the workpiece and releasing the fourth side of the workpiece; Simply remove the welded workpiece.

[0045] In this invention, generally speaking, the second clamping unit 200 does not move. Alternatively, when the second clamping unit 200 moves, the displacement of the second clamping unit 200 is less than the displacement of the elastic clamping unit 300.

[0046] like Figure 6As shown, the first clamping unit 100 includes a first clamping element 101. The first clamping element 101 extends along a first direction and is used to reciprocate along the first direction to clamp a first side or a second side of the workpiece to be welded and to release the welded workpiece.

[0047] In this invention, the first clamping element 101 is strip-shaped, that is, its cross-section is rectangular.

[0048] In some embodiments, the first clamping element 101 has a convex cross-section. Specifically, the first clamping element 101 includes a first clamping member and a second clamping member. The first clamping member extends along a first direction and is used to reciprocate along the first direction to clamp a first side or a second side of the workpiece to be welded and to release the welded workpiece. The second clamping member is disposed on the side of the first clamping member and extends along the first direction, and is used to follow the first clamping member in reciprocating along the first direction to clamp a first side or a second side of the workpiece to be welded and to release the welded workpiece.

[0049] The second clamping member is fixedly connected to the first clamping member, including but not limited to being integrally formed. This connection method is a conventional technical means in this field and will not be described in detail here.

[0050] The length of the second clamping member is equal to the length of the first clamping member, and the width of the second clamping member is less than the width of the first clamping member.

[0051] In some of these embodiments, the first clamping element 101 includes, but is not limited to, a first clamping block, a first clamping plate, etc.

[0052] In some embodiments, the first clamping unit 100 further includes a first buffer element. The first buffer element is disposed at the end of the first clamping element 101 and is used to buffer when the first clamping element 101 contacts the workpiece.

[0053] The first buffer element and the first clamping element 101 are detachably connected, including but not limited to sleeve connection, adhesive connection, etc. The above connection method is a conventional technique in this field and will not be described in detail here. The purpose of using this connection method is to facilitate the replacement of the first buffer element.

[0054] In some of these embodiments, the first buffer element includes, but is not limited to, a buffer sleeve, a buffer pad, etc.

[0055] like Figure 7 As shown, the second clamping unit 200 includes a second clamping element 201. The second clamping element 201 is disposed above or below the first clamping unit 100 and extends along the second direction, and is disposed opposite to the elastic clamping unit 300 along the second direction, for clamping the third side of the workpiece to be welded and releasing the welded workpiece.

[0056] Specifically, the second clamping element 201 is disposed above or below the first clamping element 101 and is perpendicular to the first clamping element 101.

[0057] In this invention, the second clamping element 201 is strip-shaped, that is, its cross-section is rectangular.

[0058] In some embodiments, the second clamping element 201 has a convex cross-section. Specifically, the second clamping element 201 includes a third clamping member and a fourth clamping member. The third clamping member extends along a second direction and is used to clamp the third side of the workpiece to be welded and release the welded workpiece; the fourth clamping member is disposed on the side of the third clamping member and extends along the second direction, and is used to clamp the third side of the workpiece to be welded and release the welded workpiece.

[0059] The fourth clamping member is fixedly connected to the third clamping member, including but not limited to being integrally formed. This connection method is a conventional technical means in this field and will not be described in detail here.

[0060] The length of the fourth clamping member is equal to the length of the third clamping member, and the width of the fourth clamping member is less than the width of the third clamping member.

[0061] In some embodiments, the second clamping element 201 includes, but is not limited to, a second clamping block, a second clamping plate, etc.

[0062] In some embodiments, the second clamping unit 200 further includes a second buffer element. The second buffer element is disposed at the end of the second clamping element 201 and is used to buffer when the second clamping element 201 contacts the workpiece.

[0063] The second buffer element is detachably connected to the second clamping element 201, including but not limited to sleeve connection, adhesive connection, etc. The above connection method is a conventional technique in this field and will not be described in detail here. The purpose of using this connection method is to facilitate the replacement of the second buffer element.

[0064] In some of these embodiments, the second buffer element includes, but is not limited to, a buffer sleeve, a buffer pad, etc.

[0065] like Figure 8As shown, the elastic clamping unit 300 includes a first elastic clamping element 301, a second elastic clamping element 302, and an elastic element 303. The first elastic clamping element 301 is disposed opposite to and extends along the second direction of the second clamping unit 200, and is used for reciprocating motion along the second direction to clamp the fourth side of the workpiece to be welded and to release the welded workpiece. The second elastic clamping element 302 is disposed opposite to and extends along the second direction of the first elastic clamping element 301, and is used for reciprocating motion along the second direction. The elastic element 303 is disposed between the first elastic clamping element 301 and the second elastic clamping element 302, and is connected to both the first elastic clamping element 301 and the second elastic clamping element 302.

[0066] Specifically, the first elastic clamping element 301 and the second clamping element 201 are arranged opposite each other along the second direction.

[0067] In this invention, the first elastic clamping element 301 is strip-shaped, that is, its cross-section is rectangular.

[0068] The height of the first elastic clamping element 301 is equal to the height of the second clamping element 201, and the length of the first elastic clamping element 301 is less than the length of the second clamping element 201.

[0069] Generally, the width of the first elastic clamping element 301 is equal to the width of the second clamping element 201.

[0070] In some embodiments, the first elastic clamping element 301 has a convex cross-section. Specifically, the first elastic clamping element 301 includes a fifth clamping member and a sixth clamping member. The fifth clamping member extends along a second direction and is used to reciprocate along the second direction to clamp the fourth side of the workpiece to be welded and release the welded workpiece; the sixth clamping member is disposed on the side of the fifth clamping member and extends along the second direction, and is used to follow the fifth clamping member in reciprocating along the second direction to clamp the fourth side of the workpiece to be welded and release the welded workpiece.

[0071] The sixth clamping member is fixedly connected to the fifth clamping member, including but not limited to being integrally formed. This connection method is a conventional technical means in this field and will not be described in detail here.

[0072] The length of the sixth clamping member is equal to the length of the fifth clamping member, and the width of the sixth clamping member is less than the width of the fifth clamping member.

[0073] In some of these embodiments, the first elastic clamping element 301 includes, but is not limited to, a first elastic clamping block, a first elastic clamping plate, etc.

[0074] In this invention, the second elastic clamping element 302 is strip-shaped, that is, its cross-section is rectangular.

[0075] The height of the second elastic clamping element 302 is equal to the height of the first elastic clamping element 301, and the width of the second elastic clamping element 302 is equal to the width of the first elastic clamping element 301.

[0076] Generally, the length of the second elastic clamping element 302 is equal to the length of the first elastic clamping element 301.

[0077] In some embodiments, the cross-section of the second elastic clamping element 302 is convex. Specifically, the second elastic clamping element 302 includes a seventh clamping member and an eighth clamping member. The seventh clamping member extends along a second direction for reciprocating motion along the second direction; the eighth clamping member is disposed on the side of the seventh clamping member and extends along the second direction for following the reciprocating motion of the seventh clamping member along the second direction.

[0078] The eighth clamping member is fixedly connected to the seventh clamping member, including but not limited to being integrally formed. This connection method is a conventional technical means in this field and will not be described in detail here.

[0079] The length of the eighth clamping member is equal to the length of the seventh clamping member, and the width of the eighth clamping member is less than the width of the seventh clamping member.

[0080] In some embodiments, the second elastic clamping element 302 includes, but is not limited to, a second elastic clamping block, a second elastic clamping plate, etc.

[0081] The elastic element 303 is fixedly connected to the first elastic clamping element 301 and the second elastic clamping element 302, including but not limited to welding. This connection method is a conventional technique in the field and will not be described in detail here.

[0082] In some of these embodiments, the elastic element 303 includes, but is not limited to, a spring.

[0083] In some embodiments, the third clamping unit 300 further includes a third buffer element. The third buffer element is disposed at the end of the first elastic clamping element 301 and is used to buffer when the first elastic clamping element 301 contacts the workpiece.

[0084] The third buffer element is detachably connected to the first elastic clamping element 301, including but not limited to sleeve connection, adhesive connection, etc. The above connection method is a conventional technique in this field and will not be described in detail here. The purpose of using this connection method is to facilitate the replacement of the third buffer element.

[0085] In some of these embodiments, the third buffer element includes, but is not limited to, a buffer sleeve, a buffer pad, etc.

[0086] The purpose of providing the elastic clamping unit 300 in this utility model is as follows: 1) It can be applied to workpieces of different specifications, such as workpieces with eccentric shafts; 2) If the external force continues to drive the elastic clamping unit 300 to move when the first elastic clamping element 301 is against the workpiece, the elastic element 303 can be used to buffer the movement, so that the second elastic clamping element 302 can continue to move while the first elastic clamping element 301 remains stationary, thus preventing the first elastic clamping element 301 from causing indentation on the workpiece.

[0087] The method of using this utility model is as follows: The workpiece to be welded is placed in the welding clamping device, and the third side of the workpiece abuts against the second clamping element 201; The elastic clamping unit 300 moves toward the direction of the second clamping element 201 and gradually approaches the workpiece, while the first elastic clamping element 301 abuts against the fourth side of the workpiece. The two first clamping elements 101 move toward each other, gradually approach the workpiece, and respectively abut against the first and second sides of the workpiece to complete the clamping process; After the clamping process is completed, the welding process is performed. After the welding process is completed, the two first clamping elements 101 move away from each other, gradually moving away from the workpiece, and releasing the first and second sides of the workpiece. The elastic clamping unit 300 moves away from the second clamping element 201, gradually moving away from the workpiece, and releases the fourth side of the workpiece; Simply remove the welded workpiece.

[0088] The technical effects of this utility model are as follows: 1) Compared with traditional positioning and clamping of pipe fittings, which is prone to welding deformation and positioning errors, positioning and clamping the rectangular part of the workpiece reduces positioning errors caused by welding deformation. 2) Compared with traditional clamping of pipe fittings, which is prone to displacement due to rotation during welding, positioning and clamping the rectangular part of the workpiece will not cause displacement deviation when the workpiece rotates. 3) Use elastic clamping units for elastic buffer clamping to avoid damage to the workpiece due to over-clamping caused by accidents.

[0089] Example 2 This embodiment is a modified embodiment of embodiment 1.

[0090] like Figures 2-5As shown, the welding clamping device further includes a first rotating unit 400, which is movably connected to two first clamping units 100 respectively, and is used to rotate to drive the two first clamping units 100 to move towards each other or away from each other along a first direction; a second rotating unit 500, which is movably connected to a second clamping unit 200 and an elastic clamping unit 300 respectively, and is used to rotate to drive the elastic clamping unit 300 to reciprocate along a second direction; a first guiding unit 600, which is slidably connected to two first clamping units 100 respectively, and is used to limit the movement direction of the two first clamping units 100; and a second guiding unit 700, which is connected to a second clamping unit 200 and an elastic clamping unit 300 respectively, and is used to limit the movement direction of the second clamping unit 200 and the elastic clamping unit 300.

[0091] Two first clamping units 100 are symmetrically arranged on both sides of the first rotating unit 400 with the first rotating unit 400 as the center. The first rotating unit 400 rotates around its own axis (clockwise or counterclockwise) to drive the two first clamping units 100 to move synchronously. That is, the two first clamping units 100 move with the same displacement at the same time.

[0092] The second clamping unit 200 and the elastic clamping unit 300 are arranged on both sides of the second rotating unit 500 with the second rotating unit 500 as the center (generally asymmetrical, with the second clamping unit 200 close to the center of the second rotating unit 500 and the elastic clamping unit 300 far away from the center of the second rotating unit 500). The second rotating unit 500 rotates around its own axis (clockwise or counterclockwise) to drive the elastic clamping unit 300 to move closer to or away from the second clamping unit 200.

[0093] like Figure 6 As shown, the first clamping unit 100 further includes a plurality of first sliding elements 102. The plurality of first sliding elements 102 are spaced apart along the length direction of the first clamping unit 100 on the side of the first clamping unit 100 and are slidably connected to the first rotating unit 400 respectively, for cooperating with the first rotating unit 400 to make the first clamping unit 100 reciprocate along the first direction.

[0094] Specifically, a plurality of first sliding elements 102 are spaced apart on the side of the first clamping element 101 along the length direction of the first clamping element 101.

[0095] More specifically, a plurality of first sliding elements 102 are spaced apart along the length of the second clamping member at the ends of the second clamping member away from the first clamping member.

[0096] A plurality of first sliding elements 102 are fixedly connected to the first clamping element 101, including but not limited to integral molding. This connection method is a conventional technique in the art and will not be described in detail here.

[0097] Generally, several first sliding elements 102 are distributed at equal intervals.

[0098] Generally, the first sliding element 102 is arranged in an arc shape.

[0099] In some embodiments, the first sliding element 102 includes a first slider and a first groove. The first slider is disposed on the side of the second clamping member and is slidably connected to the first rotating unit 400; the first groove is disposed on the side of the second clamping member and located on the side of the first slider, and is slidably connected to the first rotating unit 400.

[0100] Specifically, for two adjacent first sliding elements 102, the first sliding groove of the preceding first sliding element 102 is located between the first slider of the first sliding element 102 and the first slider of the following first sliding element 102.

[0101] In this invention, the first side of the first slider is an arc surface, and the second side of the first slider is a plane. Generally, the first side of the first slider faces the first groove of the same first sliding element 102, and the second side of the first slider faces the first groove of another first sliding element 102.

[0102] like Figure 7 As shown, the second clamping unit 200 further includes a plurality of second sliding elements 202. The plurality of second sliding elements 202 are spaced apart along the length direction of the second clamping unit 200 on the side of the second clamping unit 200 and are slidably connected to the second rotating unit 500 respectively, for cooperating with the second rotating unit 500.

[0103] Specifically, a plurality of second sliding elements 202 are spaced apart on the side of the second clamping element 201 along the length direction of the second clamping element 201.

[0104] More specifically, a plurality of second sliding elements 202 are spaced apart along the length of the fourth clamping member at the end of the fourth clamping member away from the third clamping member.

[0105] Several second sliding elements 202 are fixedly connected to the second clamping element 201, including but not limited to integral molding. This connection method is a conventional technique in the field and will not be described in detail here.

[0106] Generally, several second sliding elements 202 are distributed at equal intervals.

[0107] Generally, the second sliding element 202 is arranged in an arc shape.

[0108] In some embodiments, the second sliding element 202 includes a second slider and a second groove. The second slider is disposed on the side of the fourth clamping member and is slidably connected to the second rotating unit 500; the second groove is disposed on the side of the fourth clamping member and located on the side of the second slider, and is slidably connected to the second rotating unit 500.

[0109] Specifically, for two adjacent second sliding elements 202, the second sliding groove of the first second sliding element 202 is located between the second slider of the second sliding element 202 and the second slider of the second second sliding element 202.

[0110] In this invention, the first side of the second slider is an arc surface, and the second side of the second slider is a plane. Generally, the first side of the second slider faces the second groove of the same second sliding element 202, and the second side of the second slider faces the second groove of another second sliding element 202.

[0111] like Figure 8 As shown, the elastic clamping unit 300 further includes a plurality of third sliding elements 304 and a plurality of fourth sliding elements 305. The plurality of third sliding elements 304 are spaced apart along the length direction of the elastic clamping unit 300 at the first end of the elastic clamping unit 300 and are slidably connected to the second rotating unit 500 respectively, for cooperating with the second rotating unit 500 to make the first end of the elastic clamping unit 300 reciprocate along the second direction; the plurality of fourth sliding elements 305 are spaced apart along the length direction of the elastic clamping unit 300 at the second end of the elastic clamping unit 300 and are slidably connected to the second rotating unit 500 respectively, for cooperating with the second rotating unit 500 to make the second end of the elastic clamping unit 300 reciprocate along the second direction.

[0112] Specifically, a plurality of third sliding elements 304 are spaced apart on the side of the first elastic clamping element 301 along the length direction of the first elastic clamping element 301; a plurality of fourth sliding elements 305 are spaced apart on the side of the second elastic clamping element 302 along the length direction of the second elastic clamping element 302.

[0113] More specifically, a plurality of third sliding elements 304 are spaced apart along the length direction of the sixth clamping member at the end of the sixth clamping member away from the fifth clamping member; a plurality of fourth sliding elements 305 are spaced apart along the length direction of the eighth clamping member at the end of the eighth clamping member away from the seventh clamping member.

[0114] Several third sliding elements 304 are fixedly connected to the first elastic clamping element 301, including but not limited to integral molding. This connection method is a conventional technique in the art and will not be described in detail here.

[0115] Generally, several third sliding elements 304 are distributed at equal intervals.

[0116] Generally, the third sliding element 304 is arranged in an arc shape.

[0117] In some embodiments, the third sliding element 304 includes a third slider and a third groove. The third slider is disposed on the side of the sixth clamping member and is slidably connected to the second rotating unit 500; the third groove is disposed on the side of the sixth clamping member and located on the side of the third slider, and is slidably connected to the second rotating unit 500.

[0118] Among them, for two adjacent third sliding elements 304, the third sliding groove of the first third sliding element 304 is located between the third slider of the third sliding element 304 and the third slider of the second third sliding element 304.

[0119] In this invention, the first side of the third slider is an arc surface, and the second side of the third slider is a plane. Generally, the first side of the third slider faces the third groove of the same third sliding element 304, and the second side of the third slider faces the third groove of another third sliding element 304.

[0120] Several fourth sliding elements 305 are fixedly connected to the second elastic clamping element 302, including but not limited to integral molding. This connection method is a conventional technique in the field and will not be described in detail here.

[0121] Generally, several fourth sliding elements 305 are distributed at equal intervals.

[0122] Generally, the fourth sliding element 305 is arranged in an arc shape.

[0123] In some embodiments, the fourth sliding element 305 includes a fourth slider and a fourth groove. The fourth slider is disposed on the side of the sixth clamping member and is slidably connected to the second rotating unit 500; the fourth groove is disposed on the side of the sixth clamping member and located on the side of the fourth slider, and is slidably connected to the second rotating unit 500.

[0124] Specifically, for two adjacent fourth sliding elements 305, the fourth sliding groove of the previous fourth sliding element 305 is located between the fourth slider of the fourth sliding element 305 and the fourth slider of the subsequent fourth sliding element 305.

[0125] In this invention, the first side of the fourth slider is an arc surface, and the second side of the fourth slider is a flat surface. Generally, the first side of the fourth slider faces the fourth groove of the same fourth sliding element 305, and the second side of the fourth slider faces the fourth groove of another fourth sliding element 305.

[0126] like Figure 9As shown, the first rotating unit 400 includes a first base element 401, a first vortex element 402, and a first through element 403. The first base element 401 is disposed above or below the two first clamping units 100 for rotation; the first vortex element 402 is disposed on the side of the first base element 401 and slidably connected to the two first clamping units 100 respectively, for driving the two first clamping units 100 to move towards or away from each other along a first direction under the action of the first base element 401; the first through element 403 is disposed through the center of the first base element 401.

[0127] Specifically, the first base element 401 is disposed above or below the two first clamping elements 101; the first vortex element 402 is slidably connected to a plurality of first sliding elements 102, and is used to drive the two first clamping elements 101 to move toward each other or toward each other along the first direction.

[0128] The cross-section of the first base element 401 is circular.

[0129] In some of these embodiments, the first base element 401 includes, but is not limited to, a first base and a first rotating plate.

[0130] The first vortex element 402 is fixedly connected to the first base element 401, including but not limited to being integrally formed. This connection method is a conventional technique in the field and will not be described in detail here.

[0131] In some embodiments, the first vortex element 402 includes a first vortex slider and a first vortex groove. The first vortex slider is disposed on the side of the first base element 401, with a first end near the center of the first base element 401 and a second end near the outer edge of the first base element 401, and both are slidably connected to the first grooves of a plurality of first sliding elements 102. The first vortex groove is disposed on the side of the first base element 401 and is disposed synchronously with the first vortex slider, and is slidably connected to the first sliders of a plurality of first sliding elements 102.

[0132] The first vortex slider is composed of several first arc-shaped blocks of increasing size. The several first arc-shaped blocks are connected end to end to form the first vortex slider.

[0133] The first vortex slide is composed of several first arc-shaped grooves of increasing size. The several first arc-shaped grooves are connected end to end to form the first vortex slide.

[0134] In this invention, the width of the first vortex slider is approximately the same as the width of the first slide groove, meaning that one first slide groove cannot accommodate multiple first arc-shaped blocks arranged side by side.

[0135] In this invention, the width of the first vortex groove is approximately the same as the width of the first slider, meaning that one first arc-shaped groove cannot accommodate multiple first sliders arranged side by side.

[0136] The cross-section of the first through element 403 is circular.

[0137] The first through element 403 is formed on the first base element 401. Generally, it is formed by machining processes (such as cutting, stamping, etc.). Such machining processes are conventional techniques in this field and will not be described in detail here.

[0138] Generally, in the initial state, when viewed from a side view (e.g., from above), the ends of the two first clamping elements 101 are located inside the first through element 403.

[0139] In some of these embodiments, the first through element 403 includes, but is not limited to, a first through hole.

[0140] Furthermore, the first rotating unit 400 also includes a first operating element. The first operating element is disposed on the side of the first base element 401 and is used to rotate the first base element 401.

[0141] The first operating element is formed on the first base element 401. Generally, it is formed by a machining process (such as welding). This machining process is a conventional technique in the art and will not be described in detail here.

[0142] In this invention, the first operating element has the following two forms: 1) The first operating element is disposed on the outer edge surface of the first base element 401; 2) The first operating element is disposed on the side of the first base element 401 where the first vortex element 402 is not disposed, and is disposed close to the first through element 403.

[0143] In some of these embodiments, the first operating element includes, but is not limited to, a first operating lever.

[0144] like Figure 10 As shown, the second rotating unit 500 includes a second base element 501, a second vortex element 502, and a second through element 503. The second base element 501 is disposed above or below the second clamping unit 200 and the elastic clamping unit 300, and is used for rotation. The second vortex element 502 is disposed on the side of the second base element 501 and is slidably connected to the second clamping unit 200 and the elastic clamping unit 300, respectively, and is used to drive the elastic clamping unit 300 to reciprocate along a second direction under the action of the second base element 501. The second through element 503 is disposed through the center of the second base element 501.

[0145] Specifically, the second base element 501 is disposed above or below the second clamping element 201, the first elastic clamping element 301, and the second elastic clamping element 302; the second vortex element 502 is slidably connected to a plurality of second sliding elements 202, a plurality of third sliding elements 304, and a plurality of fourth sliding elements 305, respectively, for driving the first elastic clamping element 301 and the second elastic clamping element 302 to move or move along the second direction.

[0146] The cross-section of the second base element 501 is circular.

[0147] Generally, the diameter of the second base element 501 is equal to the diameter of the first base element 401.

[0148] In some of these embodiments, the second base element 501 includes, but is not limited to, a second base and a second rotating plate. The second vortex element 502 is fixedly connected to the second base element 501, including but not limited to being integrally formed. This connection method is a conventional technique in the field and will not be described in detail here.

[0149] In some embodiments, the second vortex element 502 includes a second vortex slider and a second vortex groove. The second vortex slider is disposed on the side of the second base element 501, with a first end near the center of the second base element 501 and a second end near the outer edge of the second base element 501, and is slidably connected to the second grooves of a plurality of second sliding elements 202, the third grooves of a plurality of third sliding elements 304, and the fourth grooves of a plurality of fourth sliding elements 305, respectively. The second vortex groove is disposed on the side of the second base element 501 and is disposed synchronously with the second vortex slider, and is slidably connected to the second sliders of the plurality of second sliding elements 202, the third sliders of the plurality of third sliding elements 304, and the fourth sliders of the plurality of fourth sliding elements 305, respectively.

[0150] The second vortex slider is composed of several second arc-shaped blocks of increasing size. Several second arc-shaped blocks are connected end to end to form the second vortex slider.

[0151] The second vortex slide is composed of several second arc-shaped grooves with increasing dimensions. The several second arc-shaped grooves are connected end to end to form the second vortex slide.

[0152] In this invention, the width of the second vortex slider is approximately the same as the width of the second slide groove, meaning that one second slide groove cannot accommodate multiple second arc-shaped blocks arranged side by side.

[0153] In this invention, the width of the second vortex groove is greater than the width of the second slider, meaning that one second arc-shaped groove can accommodate multiple second sliders arranged side by side. For example, one second arc-shaped groove can accommodate two second sliders arranged side by side.

[0154] In this invention, the width of the second vortex slider is approximately the same as the width of the third (fourth) slide groove, meaning that one third (fourth) slide groove cannot accommodate multiple second arc-shaped blocks arranged side by side.

[0155] In this invention, the width of the second vortex groove is approximately the same as the width of the third slider (fourth slider), meaning that one second arc groove cannot accommodate multiple third sliders (fourth sliders) arranged side by side.

[0156] The cross-section of the second through element 503 is circular.

[0157] The second through element 503 is formed on the second base element 501. Generally, it is formed by machining processes (such as cutting, stamping, etc.). Such machining processes are conventional techniques in this field and will not be described in detail here.

[0158] Generally, in the initial state, when viewed from a side view (e.g., from above), the ends of the second clamping element 201 and the first elastic clamping element 301 are located within the second through element 503.

[0159] Generally, the diameter of the second through element 503 is equal to the diameter of the first through element 403.

[0160] In some of these embodiments, the second through element 503 includes, but is not limited to, a second through hole.

[0161] Furthermore, the second rotating unit 500 also includes a second operating element. The second operating element is disposed on the side of the second base element 501 and is used to rotate the second base element 501.

[0162] The second operating element is formed on the second base element 501. Generally, it is formed by a machining process (such as welding). This machining process is a conventional technique in the art and will not be described in detail here.

[0163] In this invention, the second operating element can be implemented in the following two ways: 1) The second operating element is disposed on the outer edge surface of the second base element 501; 2) The second operating element is disposed on the side of the second base element 501 where the second vortex element 502 is not disposed, and is disposed close to the second through element 503.

[0164] In some of these embodiments, the second operating element includes, but is not limited to, a second operating lever.

[0165] like Figure 11As shown, the first guiding unit 600 includes a first substrate element 601, two first guiding elements 602, and a third through element 603. The first substrate element 601 is disposed above or below the two first clamping units 100; the two first guiding elements 602 are respectively disposed on the sides of the first substrate element 601, are arranged opposite to each other along a first direction and extend along the first direction, and are slidably connected to the two first clamping units 100 to restrict the movement direction of the first clamping units 100; the third through element 603 is disposed through the center of the first substrate element 601.

[0166] Specifically, the first substrate element 601 is disposed above or below the two first clamping elements 101; the two first guiding elements 602 are slidably connected to the two first clamping elements 101 respectively, for limiting the first clamping elements 101 to reciprocate only in the first direction; the third through element 603 is disposed corresponding to the first through element 403.

[0167] The cross-section of the first substrate element 601 is circular.

[0168] Generally, the diameter of the first substrate element 601 is equal to the diameter of the first base element 401.

[0169] In some of the embodiments, the first substrate element 601 includes, but is not limited to, a first substrate and a first limiting plate.

[0170] Two first guide elements 602 are symmetrically arranged on both sides of the first substrate element 601 with the first substrate element 601 as the center.

[0171] Two first guiding elements 602 are formed on the surface of the first substrate element 601. Generally, they are formed by machining processes (such as cutting, stamping, etc.). These machining processes are conventional techniques in the art and will not be described in detail here.

[0172] In this invention, the first guide element 602 is strip-shaped, that is, its cross-section is rectangular.

[0173] In some embodiments, the first guide element 602 has a convex cross-section. Specifically, the first guide element 602 includes a first guide member and a second guide member. The first guide member extends along a first direction and is slidably connected to the first clamping member of the first clamping element 101, thereby restricting the first clamping member to reciprocate only along the first direction. The second guide member is disposed on the side of the first guide member and extends along the first direction, and is slidably connected to the second clamping member of the first clamping element 101, thereby restricting the second clamping member to reciprocate only along the first direction.

[0174] Generally, the width of the first guide member is equal to the width of the first clamping member, the height of the first guide member is equal to the height of the first clamping member, and the length of the first guide member is greater than the length of the first clamping member.

[0175] The second guide member is fixedly connected to the first guide member, including but not limited to being integrally formed. This connection method is a conventional technique in the field and will not be described in detail here.

[0176] The length of the second guide member is equal to the length of the first guide member, and the width of the second guide member is less than the width of the first guide member.

[0177] Generally, the width of the second guide is equal to the width of the second clamping member, the height of the second guide is equal to the height of the second clamping member, and the length of the second guide is greater than the length of the second clamping member.

[0178] In some of the embodiments, the first guide element 602 includes, but is not limited to, a first guide groove and a first limiting groove.

[0179] The cross-section of the third through element 603 is circular.

[0180] The third through element 603 is formed on the first substrate element 601. Generally, it is formed by mechanical processing (such as cutting, stamping, etc.). This mechanical processing is a conventional technique in the art and will not be described in detail here.

[0181] Generally, the third through element 603 is connected to the two first guide elements 602.

[0182] Generally, the diameter of the third through element 603 is equal to the diameter of the first through element 403.

[0183] In some of these embodiments, the third through element 603 includes, but is not limited to, a third through hole.

[0184] like Figure 12 As shown, the second guiding unit 700 includes a second substrate element 701, a second guiding element 702, a third guiding element 703, and a fourth through element 704. The second substrate element 701 is disposed above or below the second clamping unit 200 and the elastic clamping unit 300. The second guiding element 702 is disposed on the side of the second substrate element 701 and extends along a second direction, and is slidably connected to the second clamping unit 200 to restrict the movement direction of the second clamping unit 200. The third guiding element 703 is disposed on the side of the second substrate element 701 and extends along a second direction, and is disposed opposite to the second guiding element 702 along the second direction, and is slidably connected to the elastic clamping unit 300 to restrict the movement direction of the elastic clamping unit 300. The fourth through element 704 is disposed through the center of the second substrate element 701.

[0185] Specifically, the second substrate element 701 is disposed above or below the second clamping element 201, the first elastic clamping element 301, and the second elastic clamping element 302; the second guide element 702 is slidably connected to the second clamping element 201 to restrict the second clamping element 201; the third guide element 703 is slidably connected to the first elastic clamping element 301 and the second elastic clamping element 302 to restrict the first elastic clamping element 301 and the second elastic clamping element 302 to reciprocate only in the second direction; and the fourth through element 704 is disposed corresponding to the second through element 503.

[0186] The cross-section of the second substrate element 701 is circular.

[0187] Generally, the diameter of the second substrate element 701 is equal to the diameter of the second base element 501.

[0188] In some of these embodiments, the second substrate element 701 includes, but is not limited to, a second substrate and a second limiting plate.

[0189] The second guide element 702 and the third guide element 703 are symmetrically arranged on both sides of the second substrate element 701 with the second substrate element 701 as the center.

[0190] The second guiding element 702 is formed on the surface of the second substrate element 701. Generally, it is formed by a machining process (such as cutting, stamping, etc.). This machining process is a conventional technique in the art and will not be described in detail here.

[0191] In this invention, the second guide element 702 is strip-shaped, that is, its cross-section is rectangular.

[0192] In some embodiments, the second guide element 702 has a convex cross-section. Specifically, the second guide element 702 includes a third guide and a fourth guide. The third guide extends along a second direction and is slidably connected to the third clamping member of the second clamping element 201, thereby restricting the third clamping member to reciprocate only along the second direction. The fourth guide is disposed on the side of the third guide and extends along the second direction, and is slidably connected to the fourth clamping member of the second clamping element 201, thereby restricting the fourth clamping member to reciprocate only along the second direction.

[0193] Generally, the width of the third guide is equal to the width of the third clamping member, the height of the third guide is equal to the height of the third clamping member, and the length of the third guide is greater than the length of the third clamping member.

[0194] The fourth guide member is fixedly connected to the third guide member, including but not limited to being integrally formed. This connection method is a conventional technique in this field and will not be described in detail here.

[0195] The length of the fourth guide member is equal to the length of the third guide member, and the width of the fourth guide member is less than the width of the third guide member.

[0196] Generally, the width of the fourth guide is equal to the width of the fourth clamping member, the height of the fourth guide is equal to the height of the fourth clamping member, and the length of the fourth guide is greater than the length of the fourth clamping member.

[0197] In some of these embodiments, the second guide element 702 includes, but is not limited to, a second guide groove and a second limiting groove.

[0198] The third guiding element 703 is formed on the surface of the second substrate element 701. Generally, it is formed by a machining process (such as cutting, stamping, etc.). This machining process is a conventional technique in the art and will not be described in detail here.

[0199] In this invention, the third guide element 703 is strip-shaped, that is, its cross-section is rectangular.

[0200] In some embodiments, the cross-section of the third guide element 703 is convex. Specifically, the third guide element 703 includes a fifth guide member and a sixth guide member. The fifth guide member extends along the second direction and is slidably connected to the fifth clamping member of the first elastic clamping element 301 and the seventh clamping member of the second elastic clamping element 302, thereby restricting the fifth and seventh clamping members to reciprocate only along the second direction. The sixth guide member is disposed on the side of the fifth guide member and extends along the second direction, and is slidably connected to the sixth clamping member of the first elastic clamping element 301 and the eighth clamping member of the second elastic clamping element 302, thereby restricting the sixth and eighth clamping members to reciprocate only along the second direction.

[0201] Generally, the width of the fifth guide is equal to the width of the fifth clamping member (seventh clamping member), the height of the fifth guide is equal to the height of the fifth clamping member (seventh clamping member), and the length of the fifth guide is greater than the length of the fifth clamping member (seventh clamping member).

[0202] The sixth guide component is fixedly connected to the fifth guide component, including but not limited to being integrally formed. This connection method is a conventional technical means in this field and will not be described in detail here.

[0203] The length of the sixth guide member is equal to the length of the fifth guide member, and the width of the sixth guide member is less than the width of the fifth guide member.

[0204] Generally, the width of the sixth guide is equal to the width of the sixth clamp (eighth clamp), the height of the sixth guide is equal to the height of the sixth clamp (eighth clamp), and the length of the sixth guide is greater than the length of the sixth clamp (eighth clamp).

[0205] In some of these embodiments, the third guide element 703 includes, but is not limited to, a third guide groove and a third limiting groove.

[0206] The cross-section of the fourth through element 704 is circular.

[0207] The fourth through element 704 is formed on the second substrate element 701. Generally, it is formed by a machining process (such as cutting, stamping, etc.). This machining process is a conventional technique in the art and will not be described in detail here.

[0208] Generally, the fourth through element 704 is connected to the second guide element 702 and the third guide element 703 respectively.

[0209] Generally, the diameter of the fourth through element 704 is equal to the diameter of the second through element 503.

[0210] In some of these embodiments, the fourth through element 704 includes, but is not limited to, a fourth through hole.

[0211] The usage method of this embodiment is as follows: The workpiece to be welded is placed in the welding clamping device, and the third side of the workpiece abuts against the second clamping element 201; Rotate the second base element 501, and through the cooperation of the second vortex element 502 with a number of third sliding elements 304 and a number of fourth sliding elements 305, the elastic clamping unit 300 moves toward the second clamping element 201 and gradually approaches the workpiece. The first elastic clamping element 301 abuts against the fourth side of the workpiece, and the rotation of the second base element 501 stops. Rotate the first base element 401, and through the cooperation of the first vortex element 402 and several first sliding elements 102, make the two first clamping elements 101 move towards each other, gradually approach the workpiece, and respectively abut against the first side and the second side of the workpiece to complete the clamping process, and stop rotating the first base element 401. It should be noted that the second base element 501 and the first base element 401 can rotate simultaneously, that is, there is no order of rotation. After the clamping process is completed, the welding process is performed. After the welding process is completed, the first base element 401 is rotated. Through the cooperation of the first vortex element 402 and several first sliding elements 102, the two first clamping elements 101 move away from each other, gradually moving away from the workpiece, and releasing the first side and the second side of the workpiece, and stopping the rotation of the first base element 401. Rotate the second base element 501, and through the cooperation of the second vortex element 502 with a number of third sliding elements 304 and a number of fourth sliding elements 305, the elastic clamping unit 300 moves away from the second clamping element 201, gradually moves away from the workpiece, and releases the fourth side of the workpiece, and stops rotating the second base element 501. It should be noted that the second base element 501 and the first base element 401 can rotate simultaneously, that is, there is no order of rotation. Simply remove the welded workpiece.

[0212] The technical effects of this embodiment are as follows: 1) By cooperating with the first rotating unit and the first clamping unit, and by cooperating with the second rotating unit, the second clamping unit, and the elastic clamping unit, rotation is converted into linear motion, reducing the overall volume of the welding clamping device; 2) The first guide unit and the second guide unit limit the movement direction of the first clamping unit and the elastic clamping unit, so as to avoid movement deviation and improve movement accuracy.

[0213] Example 3 This embodiment is a modified embodiment of embodiment 2.

[0214] like Figures 3-5 As shown, the welding clamping device also includes a first cover plate unit 800 and a second cover plate unit 900. The first cover plate unit 800 is disposed on the side of the first guide unit 600 and connected to the first guide unit 600, and is used to cover the two first clamping units 100; the second cover plate unit 900 is disposed on the side of the second guide unit 700 and connected to the second guide unit 700, and is used to cover the second clamping unit 200 and the elastic clamping unit 300.

[0215] Furthermore, the first rotating unit 400 is disposed between the first guiding unit 600 and the first cover plate unit 800; the second rotating unit 500 is disposed between the second guiding unit 700 and the second cover plate unit 900.

[0216] In this invention, the first guide unit 600 and the second guide unit 700 abut against each other. That is, the first substrate element 601 and the second substrate element 701 abut against each other, the first guide element 602 is located on the side of the first substrate element 601 away from the second substrate element 701, and the second guide element 702 and the third guide element 703 are located on the side of the second substrate element 701 away from the first substrate element 601.

[0217] like Figure 11As shown, the first guide unit 600 also includes a plurality of first connecting elements 604. The plurality of first connecting elements 604 are distributed on the side of the first guide unit 600 and are respectively connected to the first cover plate unit 800.

[0218] Specifically, a plurality of first connecting elements 604 are distributed on the side of the first substrate element 601.

[0219] The first connecting element 604 is formed on the first substrate element 601. Generally, it is formed by a machining process (such as stamping, welding, etc.). This machining process is a conventional technique in the art and will not be described in detail here.

[0220] A plurality of first connecting elements 604 are arranged around the first substrate element 601.

[0221] In some of these embodiments, the first connecting element 604 includes, but is not limited to, a first connecting ear plate.

[0222] like Figure 12 As shown, the second guide unit 700 further includes a plurality of second connecting elements 705. The plurality of second connecting elements 705 are distributed on the side of the second guide unit 700 and are respectively connected to the second cover plate unit 900.

[0223] Specifically, a plurality of second connecting elements 705 are distributed on the side of the second substrate element 701.

[0224] The second connecting element 705 is formed on the second substrate element 701. Generally, it is formed by a machining process (such as stamping, welding, etc.). This machining process is a conventional technique in the art and will not be described in detail here.

[0225] Several second connecting elements 705 are arranged around the second substrate element 701.

[0226] In some of these embodiments, the second connecting element 705 includes, but is not limited to, a second connecting ear plate.

[0227] like Figure 13 As shown, the first cover plate unit 800 includes a first cover plate element 801, a fifth through element 802, and a plurality of third connecting elements 803. The first cover plate element 801 is disposed on the side of the first guide unit 600; the fifth through element 802 is disposed through the center of the first cover plate element 801; and the plurality of third connecting elements 803 are distributed on the side of the first cover plate element 801 and are respectively connected to the first guide unit 600.

[0228] Specifically, the first cover plate element 801 is disposed on the side of the first substrate element 601, and a first base element 401 is disposed between the first cover plate element 801 and the first substrate element 601; the fifth through element 802 is disposed corresponding to the first through element 403 and the third through element 603; and a plurality of third connecting elements 803 are respectively connected to the corresponding first connecting elements 604.

[0229] The first cover plate element 801 has a circular cross-section.

[0230] Generally, the diameter of the first cover element 801 is equal to the diameter of the first substrate element 601.

[0231] In some of these embodiments, the first cover element 801 includes, but is not limited to, a first cover.

[0232] The cross-section of the fifth through element 802 is circular.

[0233] The fifth through element 802 is formed on the first cover element 801. Generally, it is formed by machining processes (such as cutting, stamping, etc.). Such machining processes are conventional techniques in this field and will not be described in detail here.

[0234] Generally, the diameter of the fifth through element 802 is not less than the diameter of the first through element 403.

[0235] In some of these embodiments, the fifth through element 802 includes, but is not limited to, a fifth through hole.

[0236] In this utility model, if the diameter of the fifth through element 802 is equal to the diameter of the first through element 403, the first operating element is disposed on the outer edge surface of the first base element 401; if the diameter of the fifth through element 802 is greater than the diameter of the first through element 403, the first operating element is disposed on the side surface of the first base element 401.

[0237] The third connecting element 803 is formed on the first cover element 801. Generally, it is formed by machining processes (such as stamping, welding, etc.). These machining processes are conventional techniques in the art and will not be described in detail here.

[0238] Several third connecting elements 803 are arranged around the first cover element 801.

[0239] The third connecting element 803 is detachably connected to the first connecting element 604, including but not limited to the use of bolt sets (a combination of bolts and nuts). This connection method is a conventional technique in the field and will not be described in detail here.

[0240] In some of these embodiments, the third connecting element 803 includes, but is not limited to, a third connecting lug.

[0241] like Figure 14 As shown, the second cover plate unit 900 includes a second cover plate element 901, a sixth through element 902, and a plurality of fourth connecting elements 903. The second cover plate element 901 is disposed on the side of the second guide unit 700; the sixth through element 902 is disposed through the center of the second cover plate element 901; and the plurality of fourth connecting elements 903 are distributed on the side of the second cover plate element 901 and are respectively connected to the second guide unit 700.

[0242] Specifically, the second cover plate element 901 is disposed on the side of the second substrate element 701, and a second base element 501 is disposed between the second cover plate element 901 and the second substrate element 701; the sixth through element 902 is disposed corresponding to the second through element 503 and the fourth through element 704; and a plurality of fourth connecting elements 903 are respectively connected to the corresponding second connecting elements 705.

[0243] The cross-section of the second cover element 901 is circular.

[0244] Generally, the diameter of the second cover element 901 is equal to the diameter of the second substrate element 701.

[0245] In some of these embodiments, the second cover element 901 includes, but is not limited to, a second cover.

[0246] The cross-section of the sixth through element 902 is circular.

[0247] The sixth through element 902 is formed on the second cover element 901. Generally, it is formed by machining processes (such as cutting, stamping, etc.). These machining processes are conventional techniques in the field and will not be described in detail here.

[0248] Generally, the diameter of the sixth penetrating element 902 is not less than the diameter of the second penetrating element 503.

[0249] In some of these embodiments, the sixth through element 902 includes, but is not limited to, the sixth through hole.

[0250] In this utility model, if the diameter of the sixth through element 902 is equal to the diameter of the second through element 503, the second operating element is disposed on the outer edge surface of the second base element 501; if the diameter of the sixth through element 902 is greater than the diameter of the second through element 503, the second operating element is disposed on the side surface of the second base element 501.

[0251] The fourth connecting element 903 is formed on the second cover element 901. Generally, it is formed by machining processes (such as stamping, welding, etc.). These machining processes are conventional techniques in the field and will not be described in detail here.

[0252] Several fourth connecting elements 903 are arranged around the second cover element 901.

[0253] The fourth connecting element 903 is detachably connected to the second connecting element 705, including but not limited to the use of bolt sets (a combination of bolts and nuts). This connection method is a conventional technique in the field and will not be described in detail here.

[0254] In some of these embodiments, the fourth connecting element 903 includes, but is not limited to, a fourth connecting lug.

[0255] The usage method of this embodiment is basically the same as that of embodiment 2, and will not be repeated here.

[0256] The technical effects of this embodiment are basically the same as those of Embodiment 2, and will not be repeated here.

[0257] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A welding clamping device, characterized in that, include: Two first clamping units are arranged opposite to each other along a first direction and extend along the first direction, and are used to reciprocate along the first direction to clamp opposite first and second sides of the workpiece to be welded and to release the welded workpiece. The second clamping unit is disposed above or below the first clamping unit and extends along the second direction, and is used to clamp the third side of the workpiece to be welded and to release the welded workpiece. An elastic clamping unit is disposed opposite to and extends along the second clamping unit along the second direction, and is used to reciprocate along the second direction to clamp the fourth side of the workpiece to be welded, which is opposite to the third side, and to release the welded workpiece. Wherein, the second direction is perpendicular to the first direction, the first side and the second side are two sides of the workpiece to be welded that are symmetrical along the first direction, and the third side and the fourth side are two sides of the workpiece to be welded that are symmetrical along the second direction. In the initial state of the welding clamping device, the distance between the end of the elastic clamping unit and the end of the second clamping unit is different from the distance between the ends of the two first clamping units.

2. The welding clamping device according to claim 1, characterized in that, The first clamping unit includes: A first clamping element, extending along a first direction, is used to reciprocate along the first direction to clamp a first side or a second side of a workpiece to be welded and to release a welded workpiece; and / or The second clamping unit includes: A second clamping element is disposed above or below the first clamping unit and extends along a second direction, and is disposed opposite to the elastic clamping unit along the second direction, for clamping the third side of the workpiece to be welded and releasing the welded workpiece; and / or The elastic clamping unit includes: A first elastic clamping element is disposed opposite to and extends along the second direction from the second clamping unit, and is used to reciprocate along the second direction to clamp the fourth side of the workpiece to be welded and release the welded workpiece. The second elastic clamping element is disposed opposite to the first elastic clamping element along the second direction and extends along the second direction, and is used for reciprocating motion along the second direction; An elastic element is disposed between the first elastic clamping element and the second elastic clamping element, and is connected to the first elastic clamping element and the second elastic clamping element respectively.

3. The welding clamping device according to claim 1 or 2, characterized in that, Also includes: A first guide unit is slidably connected to two first clamping units respectively, and is used to restrict the movement direction of the two first clamping units; and / or A second guide unit, connected to both the second clamping unit and the elastic clamping unit, is used to restrict the movement direction of the second clamping unit and the elastic clamping unit; and / or A first rotating unit is movably connected to two first clamping units respectively, and is used to rotate to drive the two first clamping units to move towards each other or away from each other along a first direction. and / or The second rotating unit is movably connected to the second clamping unit and the elastic clamping unit, respectively, and is used to rotate to drive the elastic clamping unit to reciprocate along the second direction.

4. The welding clamping device according to claim 3, characterized in that, The first guiding unit includes: A first substrate element is disposed above or below the two first clamping units; Two first guide elements are respectively disposed on the side of the first substrate element. The two first guide elements are disposed opposite to each other along the first direction and extend along the first direction, and are respectively slidably connected to the two first clamping units to limit the movement direction of the first clamping units. A third penetrating element, wherein the third penetrating element is disposed through the center of the first substrate element; and / or The second guiding unit includes: The second substrate element is disposed above or below the second clamping unit and the elastic clamping unit; The second guide element is disposed on the side of the second substrate element and extends along the second direction, and is slidably connected to the second clamping unit to limit the movement direction of the second clamping unit. A third guide element is disposed on the side of the second substrate element and extends along the second direction, and is disposed opposite to the second guide element along the second direction, and is slidably connected to the elastic clamping unit to limit the movement direction of the elastic clamping unit. A fourth through element is disposed through the center of the second substrate element.

5. The welding clamping device according to claim 3, characterized in that, The first clamping unit further includes: A plurality of first sliding elements are spaced apart along the length direction of the first clamping unit on the side of the first clamping unit and are slidably connected to the first rotating unit, for cooperating with the first rotating unit to cause the first clamping unit to reciprocate along a first direction; and / or The second clamping unit further includes: A plurality of second sliding elements are spaced apart along the length of the second clamping unit on the side of the second clamping unit and are slidably connected to the second rotating unit for cooperating with the second rotating unit; and / or The elastic clamping unit further includes: A plurality of third sliding elements are spaced apart along the length direction of the elastic clamping unit at the first end of the elastic clamping unit and are respectively slidably connected to the second rotating unit for cooperating with the second rotating unit to make the first end of the elastic clamping unit reciprocate along the second direction; A plurality of fourth sliding elements are spaced apart along the length direction of the elastic clamping unit at the second end of the elastic clamping unit and are respectively slidably connected to the second rotating unit for cooperating with the second rotating unit to make the second end of the elastic clamping unit reciprocate along the second direction.

6. The welding clamping device according to claim 3, characterized in that, The first rotating unit includes: A first base element is disposed above or below the two first clamping units and is used for rotation; The first vortex element is disposed on the side of the first base element and is slidably connected to the two first clamping units respectively, and is used to drive the two first clamping units to move towards each other or away from each other along the first direction under the action of the first base element. A first penetrating element, wherein the first penetrating element is disposed through the center of the first base element; and / or The second rotating unit includes: The second base element is disposed above or below the second clamping unit and the elastic clamping unit, and is used for rotation; The second vortex element is disposed on the side of the second base element and is slidably connected to the second clamping unit and the elastic clamping unit respectively, and is used to drive the elastic clamping unit to reciprocate along the second direction under the action of the second base element; The second through element is disposed through the center of the second base element.

7. The welding clamping device according to claim 3, characterized in that, Also includes: A first cover plate unit, disposed on the side of the first guide unit and connected to the first guide unit, is used to cover the two first clamping units; and / or The second cover plate unit is disposed on the side of the second guide unit and connected to the second guide unit, and is used to cover the second clamping unit and the elastic clamping unit.

8. The welding clamping device according to claim 7, characterized in that, The first guiding unit further includes: A plurality of first connecting elements are distributed on the side of the first guide unit and are respectively connected to the first cover plate unit; and / or The second guiding unit also includes; A plurality of second connecting elements are distributed on the side of the second guide unit and are respectively connected to the second cover plate unit.

9. The welding clamping device according to claim 7, characterized in that, The first cover plate unit includes: A first cover plate element is disposed on the side of the first guide unit; The fifth penetrating element is disposed through the center of the first cover plate element; A plurality of third connecting elements are distributed on the side of the first cover plate element and are respectively connected to the first guide unit; and / or The second cover plate unit includes: The second cover plate element is disposed on the side of the second guide unit; The sixth through element is disposed through the center of the second cover element; A plurality of fourth connecting elements are distributed on the side of the second cover plate element and are respectively connected to the second guide unit.

10. A welding system, characterized in that, include: The welding clamping device as described in any one of claims 1 to 9.

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