Welding fixture

Abstract

The present invention provides a welding jig for fixing workpieces and components to be welded; it includes a support plate, a support device arranged on the support plate, and a pressure plate assembly. The support plate is provided with a support block mounting hole. The support device is used to place a first component; the support device includes a fixed block and a support block, the fixed block is fixedly connected to the lower surface of the support plate, and one end of the support block close to the fixed block is elastically connected to the fixed block; the support block is provided with a first support surface corresponding to the first welding surface, and a second support surface corresponding to the second welding surface; a positioning pin is provided on the first support surface. The pressure plate assembly includes a pressure plate, a first drive assembly and a second drive assembly. The welding jig provided by the present invention can solve the problems of high jig cost, complicated steps, low work efficiency, and decreased product dimensional accuracy caused by too many welding jigs.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, and in particular to a welding jig. Background Art

[0002] When assembling products, it is often necessary to weld and fix multiple components. When there are many components to be welded, multiple sets of welding jigs are often required to complete the entire welding work. However, too many welding jigs will not only increase the investment cost of the jigs, but also reduce the dimensional accuracy of the product due to repeated positioning. In addition, there are many clamping steps, which leads to low work efficiency and increases the probability of product bumps and scratches during multiple clamping processes.

[0003] The company currently produces a product that not only has the problem of a large number of components when welding components, but also has a welding surface including the front and side surfaces (two surfaces perpendicular to each other), and the components need to be clamped in two directions, which increases the difficulty of clamping the welding fixture. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a welding jig to solve the problems of excessive jig cost, complicated steps, low work efficiency, and decreased product dimensional accuracy due to multiple clamping in the prior art.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A welding jig is used to fix workpieces and components to be welded; it comprises: a support plate, a support device arranged on the support plate, and a pressure plate assembly;

[0007] The support plate is provided with a support block mounting hole;

[0008] The supporting device is used to place a first component, the first component includes a first welding surface and a second welding surface arranged perpendicular to each other; the supporting device includes a fixing block and a supporting block, the fixing block is fixedly connected to the lower surface of the supporting plate, one end of the supporting block close to the fixing block is elastically connected to the fixing block, and one end of the supporting block away from the fixing block penetrates from the lower surface side of the supporting block mounting hole and passes out from the upper surface side of the supporting block mounting hole; the supporting block is provided with a first supporting surface corresponding to the first welding surface, and a second supporting surface corresponding to the second welding surface; a positioning pin is provided on the first supporting surface, the first component is provided with a positioning hole corresponding to the positioning pin, and a pin hole corresponding to the positioning pin is provided on the workpiece;

[0009] The pressure plate assembly includes a pressure plate, a first driving assembly and a second driving assembly; the pressure plate includes a first pressing surface corresponding to the first welding surface and a second pressing surface corresponding to the second welding surface, the first pressing surface is provided with a first welding avoidance hole, and the second pressing surface is provided with a second welding avoidance hole; the first driving assembly is used to drive the pressure plate so that the pressure plate moves in a vertical direction, so that the first pressing surface presses or loosens the workpiece and the first component in the vertical direction; the second driving assembly is used to drive the pressure plate so that the pressure plate moves in a horizontal direction, so that the second pressing surface presses or loosens the workpiece and the first component in the horizontal direction.

[0010] Further improvements to the above technical solution are:

[0011] The support block also includes a third support surface, which is parallel to the first support surface and arranged lower than the first support surface; the support block is provided with a push rod mounting hole on the third support surface, and the support device also includes a push rod, and one end of the push rod close to the fixed block is elastically connected to the fixed block, the push rod is inserted into the push rod mounting hole, and the upper surface of the push rod in a free state is lower than the third support surface to form a accommodating cavity for placing the second component; the pressure plate also includes a third pressing surface corresponding to the third support surface.

[0012] The number of the supporting devices is more than two groups, and the supporting devices are arranged in parallel and at intervals on the supporting plate.

[0013] The fixing block is provided with a support block mounting groove on the upper surface close to the support plate, and the support block and the fixing block are respectively provided with corresponding spring holes, and springs are arranged in the spring holes, and the springs are respectively abutted against the support block and the fixed block; a support block limiting block is provided on the support plate, and a limiting groove is correspondingly provided on the support block.

[0014] The first driving assembly is arranged near the support plate on one side close to the supporting device, and includes a first fixing plate and a second fixing plate spaced apart from top to bottom, and a first driving device arranged on the first fixing plate; the first fixing plate on one side close to the supporting plate extends toward the supporting plate at both ends in the length direction to form protrusions, and the first fixing plate is fixedly connected to the pressing plate through the two protrusions and the first fixing plate between the two protrusions; a driving hole is provided at a position of the second fixing plate corresponding to the first driving device, and a driving end of the first driving device is inserted into the driving hole, and when the driving end of the first driving device is extended or retracted, it can drive the first fixing plate to move up and down.

[0015] The support plate and the convex blocks are respectively provided with guide posts at positions corresponding to the convex blocks, and the convex blocks are provided with corresponding guide holes.

[0016] The second fixing plate is provided with a support bar and a guide mechanism; the support bar is used to support the first fixing plate; when the first fixing plate moves up and down, the guide mechanism is used to guide the first fixing plate.

[0017] The second driving assembly includes a second driving device disposed below the supporting plate and a driving block disposed on the lower surface of the second fixing plate; a driving end of the second driving device is fixedly connected to the driving block.

[0018] The second driving assembly also includes a guide rail assembly arranged under the second fixed plate, a blocking plate arranged on the surface of the second fixed plate on the side away from the support plate, and a blocking block arranged corresponding to the blocking plate; the guide rail assembly is used to guide the second fixed plate in the driving direction of the second driving device; the blocking plate and the blocking block are used to limit the minimum distance between the second fixed plate and the support plate.

[0019] The pressure plate assembly also includes a welding insert, which is fixed to the upper surface of the pressure plate. The welding insert is provided with a conical hole corresponding to the first welding avoidance hole, and the cross-sectional area of ​​the conical hole gradually decreases from the end away from the pressure plate to the end close to the pressure plate; a plurality of positioning blocks are provided on the support plate, and the plurality of positioning blocks are arranged to form a placement space for placing the workpiece.

[0020] According to the technical solution of the present invention, the welding jig of the present invention positions the relative positions of the first component and the workpiece by setting a first positioning pin on the supporting device, thereby ensuring the welding accuracy between the first component and the workpiece. The upper surface of the workpiece is pressed by the first pressing surface of the pressing plate, and the vertical surface of the workpiece is pressed by the second pressing surface of the pressing plate. The first welding avoidance hole is set on the first pressing surface and the second welding avoidance hole is set on the second pressing surface to avoid the parts that need to be welded, so as to avoid the interference of the pressing plate with the welding when pressing the workpiece. At the same time, by setting the elastic connection between the support block and the fixed block, the pressing plate keeps the first welding surface of the first component always in contact with the surface of the workpiece when pressing the workpiece downward, so as to improve the precision of welding and improve the stability of welding. The welding jig of the present invention can press the workpiece and the component in two directions, reduce the investment quantity and cost of the jig, improve work efficiency, reduce the number of clamping times, and avoid the problem of low dimensional accuracy of the workpiece caused by too many clamping times. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the overall structure of a welding fixture according to an embodiment of the present invention.

[0022] Figure 2This is a structural schematic diagram of the welding fixture according to an embodiment of the present invention without the first driving assembly.

[0023] Figure 3 for Figure 2 A is an enlarged structural diagram of FIG.

[0024] Figure 4 This is a schematic structural diagram of the welding fixture according to an embodiment of the present invention without the first driving assembly and the workpiece.

[0025] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at B.

[0026] Figure 6 Schematic diagram of the structure of the support device according to an embodiment of the present invention.

[0027] Figure 7 It is a schematic diagram of the exploded structure of the supporting device according to an embodiment of the present invention.

[0028] Figure 8 It is a schematic diagram of the front structure of the pressing plate according to an embodiment of the present invention.

[0029] Fig. 9 It is a schematic diagram of the reverse structure of the pressing plate according to an embodiment of the present invention.

[0030] Fig.10 Schematic diagram of the structure of the first drive assembly and the second drive assembly according to an embodiment of the present invention.

[0031] Fig.11 Schematic diagram of the structure of the first drive assembly and the second drive assembly according to an embodiment of the present invention.

[0032] Fig.12 Schematic diagram of the structure of the second component of an embodiment of the present invention.

[0033] Fig.13 Schematic diagram of the structure of the first component of an embodiment of the present invention.

[0034] Fig.14 Schematic diagram of the structure of a workpiece according to an embodiment of the present invention.

[0035] The meanings of the symbols in the accompanying drawings are:

[0036] 1-working platform; 2-support plate; 3-pressing plate; 4-welding insert; 5-second drive assembly; 6-first drive assembly; 7-support device; 100-workpiece; 200-second assembly; 300-first assembly;

[0037] 21-positioning block; 22-supporting foot; 23-guide column; 24-support block limit block; 31-third pressing surface; 32-first pressing surface; 33-side wall receiving groove; 34-second pressing surface; 35-workpiece pressing surface; 36-first welding avoidance hole; 37-second welding avoidance hole; 51-second driving device; 52-guide rail assembly; 53-driving block; 54-blocking plate; 55-blocking block; 61-first driving device; 62-guide mechanism; 63-first fixing plate; 631-guide hole; 632-bump; 64-support bar; 65-second fixing plate; 71-fixing block ;711-third supporting surface;712-first supporting surface;713-second supporting surface;714-top rod mounting hole;715-limiting groove;72-first fixing block;721-first spring;722-support block mounting groove;73-second fixing block;731-second spring;74-locating pin;75-top rod;101-main body;102-side wall;103-first connecting part;104-second connecting part;105-pin hole;201-threaded boss;202-third welding surface;301-locating hole;302-first welding surface;303-second welding surface. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0040] Example 1: Figures 1 to 11 As shown, the welding fixture of this embodiment is used to fix the workpiece 100 and components to be welded. The number of the components is 4, including two first components 300 and two second components 200. Fig.13 As shown, the first component 300 includes a first welding surface 302 and a second welding surface 303 that are perpendicular to each other, and a positioning hole 301 is provided on the first component 300. Fig.12 As shown, the second component 200 includes a third welding surface 202 and a threaded boss 201 protruding from the third welding surface 202. Fig.14As shown, the workpiece 100 includes a body 101, a side wall 102 vertically arranged with respect to the body 101, and a first connection part 103 and a second connection part 104 formed by bending outwardly at one end of the side wall 102 away from the body 101, wherein the first connection part 103 is used for welding and fixing with the first component 300, and the second connection part 104 is used for welding and fixing with the second component 200; the distance between the second connection part 104 and the body 101 is smaller than the distance between the first connection part 103 and the body 101. Pin holes 105 corresponding to the positioning holes 301 are provided on the first connection part 103 and the second connection part 104.

[0041] The welding fixture of this embodiment includes a working platform 1 , a supporting plate 2 and a pressing plate assembly arranged on the working platform 1 , and a supporting device 7 arranged on the supporting plate 2 .

[0042] like Figures 1 to 5 As shown, the support plate 2 in this embodiment is fixed above the work platform 1 by four spaced legs 22, and a plurality of positioning blocks 21 are provided on the support plate 2, and the plurality of positioning blocks 21 are arranged to form a placement space for placing the workpiece 100. Specifically, in this embodiment, the number of the positioning blocks 21 is 6.

[0043] like Figure 6 and Figure 7 As shown, the supporting device 7 is used to place the first component 300 and the second component 200. The supporting device 7 includes a fixing block 71, a supporting block and a push rod 75.

[0044] One end of the support block close to the fixed block 71 is elastically connected to the fixed block 71, and one end of the support block away from the fixed block 71 is inserted from the lower surface side of the support block mounting hole on the support plate 2 and is passed out from the upper surface side of the support block mounting hole. The support block is provided with a first support surface 712 corresponding to the first welding surface 302, a second support surface 713 corresponding to the second welding surface 303, and a third support surface 711. The third support surface 711 is parallel to the first support surface 712 and is arranged lower than the first support surface 712. A positioning pin 74 is provided on the first support surface 712, a positioning hole 301 corresponding to the positioning pin 74 is provided on the first component 300, and a pin hole 105 corresponding to the positioning pin 74 is provided on the workpiece 100.

[0045] The fixing block 71 is fixedly connected to the lower surface of the support plate 2, and the fixing block 71 includes a first fixing block 72 and a second fixing block 73. The second fixing block 73 is arranged below the first fixing block 72 and is fixedly connected to the first fixing block 72. A support block mounting groove 722 is arranged on the upper surface of the first fixing block 72. The support block mounting groove 722 is formed by the upper surface of the first fixing block 72 being recessed downward and extending along the length direction of the first fixing block 72. The support block mounting groove 722 is used to mount the support block. The support block and the fixing block 71 are respectively provided with corresponding first spring holes (not shown). The first spring holes are provided with first springs 721. The first springs 721 are respectively in contact with the support block and the first fixing block 72. The support block is elastically connected to the first fixing block 72 through the first springs 721.

[0046] The support block is provided with a push rod mounting hole 714 on the third support surface 711, and one end of the push rod 75 close to the fixing block 71 is elastically connected to the second fixing block 73. The push rod 75 is inserted into the push rod mounting hole 714, and the upper surface of the push rod 75 is lower than the third support surface 711 in a free state, so as to form an accommodating cavity for placing the second component 200. The second fixing block 73 and the push rod 75 are respectively provided with corresponding second spring holes (not shown), and a second spring 731 is provided in the second spring hole, and the second spring 731 abuts against the push rod 75 and the second fixing block 73, respectively, and the push rod 75 is elastically connected to the second fixing block 73 through the second spring 731.

[0047] In this embodiment, there are two groups of support blocks and push rods 75, and the two support blocks are arranged in the support block mounting groove 722 of the fixed block 71 at intervals. Each support block is used to place a first component 300 and a second component 200. The fixed block 71 is guided by the side wall of the support block mounting hole for movement and circumferential limit. Three support block limit blocks 24 are respectively provided on the support plate 2, and corresponding limit grooves 715 are respectively provided on the two support blocks. The support block limit blocks 24 cooperate with the limit grooves 715 to limit the support blocks in the vertical direction. The support block limit blocks 24 are respectively arranged on the side away from each other of the two support blocks, and between the two support blocks.

[0048] like Figure 1 , Figure 8 and Fig. 9 As shown, the pressure plate assembly includes a pressure plate 3, a welding insert 4, a first drive assembly 6 and a second drive assembly 5.

[0049] The pressing plate 3 includes a workpiece pressing surface 35 arranged along the length direction of the supporting plate 2, a side wall receiving groove 33 adjacent to the workpiece pressing surface 35 and formed by the workpiece pressing surface 35 being recessed inwardly, a first pressing surface 32 adjacent to the side wall receiving groove 33 and formed by the workpiece pressing surface 35 being recessed inwardly, and a third pressing surface 31 adjacent to the first pressing surface 32. The first pressing surface 32 is used to press the first connecting portion 103 of the workpiece 100 and the first welding surface 302 of the first component 300. The third pressing surface 31 is used to press the second connecting portion 104 of the workpiece 100 and the second welding surface 303 of the second component 200. The side wall receiving groove 33 is used to accommodate the side wall portion 102 of the workpiece 100. The workpiece pressing surface 35 is used to press the body portion 101 of the workpiece 100. The side wall of the workpiece pressing surface 35 facing the side wall receiving groove 33 is a second pressing surface 34 , and the second pressing surface 34 is used to press or release the workpiece 100 and the first component 300 in the horizontal direction.

[0050] A first welding avoidance hole 36 is provided on the first pressing surface 32 of the pressing plate 3, and a second welding avoidance hole 37 is provided on the second pressing surface 34. In order to further enhance the pressing force of the pressing plate 3 on the workpiece 100 and the assembly so as to make the welding operation more accurate, the number of the second welding avoidance holes 37 is multiple, and the multiple second welding avoidance holes 37 are arranged at intervals, each of the second welding avoidance holes 37 is used for a welding fixing point, and the hole wall between the two second welding avoidance holes 37 can play a better pressing role on the workpiece 100 and the second welding surface 303 of the first assembly 300.

[0051] The welding insert 4 is fixed to the upper surface of the pressing plate 3 , and is provided with a conical hole corresponding to the first welding avoidance hole 36 , wherein the cross-sectional area of ​​the conical hole gradually decreases from the end away from the pressing plate 3 to the end close to the pressing plate 3 .

[0052] like Fig.10 and Fig.11 As shown, the first driving assembly 6 is used to drive the pressing plate 3 to move the pressing plate 3 in the vertical direction, so that the first pressing surface 32 presses or releases the workpiece 100 and the first assembly 300 in the vertical direction. Specifically, in this embodiment, the first driving assembly 6 is arranged near the support plate 2 on one side close to the support device 7, and includes a first fixing plate 63 and a second fixing plate 65 spaced from top to bottom, a first driving device 61 arranged on the first fixing plate 63, a guide mechanism 62 connected to the first fixing plate 63 and the second fixing plate 65 respectively, and a support bar 64 arranged on the second fixing plate 65.

[0053] In this embodiment, the first driving device 61 is a cylinder, and the first driving device 61 is fixed on the first fixing plate 63. The second fixing plate 65 is provided with a driving hole at a position corresponding to the first driving device 61, and the driving end of the first driving device 61 is inserted into the driving hole. When the driving end of the first driving device 61 is extended or retracted, the driving end contacts with the fixed second fixing plate 65 to form a reaction force, so that the first fixing plate 63 moves up and down. The support bar 64 is used to support the first fixing plate 63. When the first fixing plate 63 moves up and down, the guide mechanism 62 is used to guide the first fixing plate 63. In this embodiment, the number of the guide mechanisms 62 is four, which are respectively arranged near the four corners of the first fixing plate 63 and the second fixing plate 65. The guide mechanism 62 is a linear bearing, the optical axis of the linear bearing is fixedly connected to the second fixing plate 65, and the bearing sleeve of the linear bearing is fixedly connected to the first fixing plate 63.

[0054] The first fixing plate 63 has two ends in the length direction of one side close to the supporting plate 2 extending toward the supporting plate 2 to form protrusions 632 . The first fixing plate 63 is fixedly connected to the pressing plate 3 via the two protrusions 632 and the first fixing plate 63 between the two protrusions 632 .

[0055] The support plate 2 is provided with guide posts 23 at positions corresponding to the protrusions 632 , and the protrusions 632 are provided with corresponding guide holes 631 .

[0056] The second driving assembly 5 is used to drive the pressing plate 3 to move the pressing plate 3 in a horizontal direction, so that the second pressing surface 34 presses or releases the workpiece 100 and the first assembly 300 in the horizontal direction.

[0057] The second driving assembly 5 includes a second driving device 51 arranged below the support plate 2, a driving block 53 arranged on the lower surface of the second fixed plate 65, a guide rail assembly 52 arranged under the second fixed plate 65, a blocking plate 54 arranged on the surface of the second fixed plate 65 away from the support plate 2, and a blocking block 55 arranged corresponding to the blocking plate 54.

[0058] In this embodiment, the second driving device 51 is a cylinder device. The driving end of the second driving device 51 is fixedly connected to the driving block 53. The guiding direction of the guide rail assembly 52 is the same as the driving direction of the second driving device 51. The blocking block 55 is fixedly arranged on the working platform 1. When the second driving device 51 pulls the second fixing plate 65 toward the support plate 2, the blocking plate 54 can abut against the blocking block 55 to limit the moving distance of the second fixing plate 65 in the driving direction (pulling direction) of the second driving device 51.

[0059] The working principle of the welding fixture of this embodiment is as follows: two first components 300 and two second components 200 are placed at the corresponding positions of the support block respectively. The positioning hole 301 of the first component 300 is inserted into the positioning pin 74. The second component 200 is placed in the accommodating cavity, and the threaded boss 201 is placed upward. Then the workpiece 100 is placed in the placement space surrounded by the positioning block 21 of the support plate 2, and the side wall portion 102 is set toward the side of the support block, so that the pin hole 105 is inserted into the positioning pin 74. After the workpiece 100 and the components are placed, the second driving device 51 is turned off, and the second driving device 51 pulls the second fixing plate 65 and drives the first fixing plate 63 to move toward the support plate 2, and moves the second pressing surface 34 of the pressing plate 3 to the side of the side wall portion 102 of the workpiece 100 away from the first fixing plate 63. The first driving device 61 is turned off, and the first driving device 61 drives the first fixing plate 63 to move downward, and the pressing plate 3 moves downward and presses the workpiece 100 and the components in the vertical direction. The second driving device 51 is started, and the second driving device 51 pushes the second fixing plate 65 to move away from the support plate 2, and the pressing plate 3 moves accordingly, so that the second pressing surface 34 presses the workpiece 100. When the pressing plate 3 presses the workpiece 100 downward, the first component 300 and the second component 200 are acted upon by the elastic force of the spring, and can ensure that they are always in contact with the surface of the workpiece 100, thereby improving the reliability of welding.

[0060] The welding jig of the present invention can complete the clamping and coordination of four components and a workpiece 100 at one time, greatly reducing the investment in the cost of the jig, while reducing the problem of reduced product dimensional accuracy caused by multiple clamping, and avoiding the influence of uncertain factors in multiple clamping, reducing the probability of product bumps and scratches. At the same time, the support block and the push rod 75 of the welding jig of the present invention are both elastic floating structures, which can keep the components in contact with the workpiece 100 at all times, effectively improving the reliability and stability of the welding work, and reducing the probability of rework.

[0061] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A welding jig for fixing workpieces and components to be welded; characterized in that: include: A support plate, a support device disposed on the support plate, and a pressure plate assembly; The support plate is provided with a support block mounting hole; The supporting device is used to place a first component, the first component includes a first welding surface and a second welding surface arranged perpendicular to each other; the supporting device includes a fixing block and a supporting block, the fixing block is fixedly connected to the lower surface of the supporting plate, one end of the supporting block close to the fixing block is elastically connected to the fixing block, and one end of the supporting block away from the fixing block penetrates from the lower surface side of the supporting block mounting hole and passes out from the upper surface side of the supporting block mounting hole; the supporting block is provided with a first supporting surface corresponding to the first welding surface, and a second supporting surface corresponding to the second welding surface; a positioning pin is provided on the first supporting surface, the first component is provided with a positioning hole corresponding to the positioning pin, and a pin hole corresponding to the positioning pin is provided on the workpiece; The pressing plate assembly includes a pressing plate, a first driving assembly and a second driving assembly; the pressing plate includes a first pressing surface corresponding to the first welding surface and a second pressing surface corresponding to the second welding surface, the first pressing surface is provided with a first welding avoidance hole, and the second pressing surface is provided with a second welding avoidance hole; the first driving assembly is used to drive the pressing plate to move the pressing plate in a vertical direction, so that the first pressing surface presses or loosens the workpiece and the first assembly in the vertical direction; the second driving assembly is used to drive the pressing plate to move the pressing plate in a horizontal direction, so that the second pressing surface presses or loosens the workpiece and the first assembly in the horizontal direction ; The support block also includes a third support surface, which is parallel to the first support surface and is arranged lower than the first support surface; the support block is provided with a push rod mounting hole on the third support surface, and the support device also includes a push rod, and the end of the push rod close to the fixed block is elastically connected to the fixed block, the push rod is passed through the push rod mounting hole, and the upper surface of the push rod in the free state is lower than the third support surface to form a accommodating cavity for placing the second component; the pressure plate also includes a third pressing surface corresponding to the third support surface; the number of the support devices is more than two groups, and the support devices are arranged in parallel and at intervals on the support plate.

2. The welding jig according to claim 1, characterized in that: The fixing block is provided with a support block mounting groove on the upper surface close to the support plate, and the support block and the fixing block are respectively provided with corresponding spring holes, and springs are arranged in the spring holes, and the springs are respectively in contact with the support block and the fixing block; The support plate is provided with a support block limiting block, and the support block is correspondingly provided with a limiting groove.

3. The welding jig according to claim 1, characterized in that: The first driving assembly is arranged near the support plate on one side close to the support device, and includes a first fixing plate and a second fixing plate spaced apart from top to bottom, and a first driving device arranged on the first fixing plate; both ends of the first fixing plate on one side close to the support plate extend toward the support plate to form protrusions; a driving hole is provided at a position of the second fixing plate corresponding to the first driving device, and a driving end of the first driving device is inserted into the driving hole. When the driving end of the first driving device is extended or retracted, it can drive the first fixing plate to move up and down.

4. The welding jig according to claim 3, characterized in that: The support plate and the convex blocks are respectively provided with guide posts at positions corresponding to the convex blocks, and the convex blocks are provided with corresponding guide holes.

5. The welding jig according to claim 3, characterized in that: The second fixing plate is provided with a support bar and a guide mechanism; the support bar is used to support the first fixing plate; when the first fixing plate moves up and down, the guide mechanism is used to guide the first fixing plate.

6. The welding jig according to claim 3, characterized in that: The second driving assembly includes a second driving device disposed below the supporting plate and a driving block disposed on the lower surface of the second fixing plate; The driving end of the second driving device is fixedly connected to the driving block.

7. The welding jig according to claim 6, characterized in that: The second driving assembly also includes a guide rail assembly arranged under the second fixed plate, a blocking plate arranged on the surface of the second fixed plate on the side away from the support plate, and a blocking block arranged corresponding to the blocking plate; the guide rail assembly is used to guide the second fixed plate in the driving direction of the second driving device; the blocking plate and the blocking block are used to limit the minimum distance between the second fixed plate and the support plate.

8. The welding jig according to claim 1, characterized in that: The pressing plate assembly further comprises a welding insert, the welding insert is fixed to the upper surface of the pressing plate, the welding insert is provided with a tapered hole aligned with the first welding avoidance hole, and the cross-sectional area of ​​the tapered hole gradually decreases from an end away from the pressing plate to an end close to the pressing plate; The support plate is provided with a plurality of positioning blocks, and the plurality of positioning blocks are arranged to form a placement space for placing the workpiece.

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