CN206854871U - A kind of four pin mark welding head devices - Google Patents

Abstract

The utility model provides a four-pin spot welding head device, which includes a laser alignment mechanism, a position sensing mechanism, a fixed base, a welding needle guiding mechanism, a pressure adjustment mechanism, a welding needle position adjustment mechanism and a fast welding needle adjustment mechanism; The base is provided with a spot welding head vertical plate with holes, the fast welding needle adjustment mechanism is set at the front end of the spot welding head vertical plate, and the fast welding needle adjustment mechanism is provided with a guide through hole; At the rear end of the board, the laser alignment mechanism is set on the fixed base; the welding needle position adjustment mechanism is movably connected with the welding needle guiding mechanism, and the welding needle guiding mechanism slides on the fast welding needle adjustment mechanism; the front end of the pressure adjustment mechanism is fixed on the On the welding needle guiding mechanism, the end extends to the front end of the position sensing mechanism. The utility model has the advantages: the spot welding head device of the utility model can improve the welding efficiency of the solder joints, ensure the welding quality of the solder joints, and can greatly increase the speed of needle adjustment.

Description

A four-pin spot welding head device

technical field

The utility model relates to the field of spot welding equipment, in particular to a four-pin spot welding head device.

Background technique

Lithium batteries are currently the main batteries used in China. They are widely used in notebook computers, mobile power supplies, electric tools, electric bicycles, electric motorcycles, electric vehicles, solar energy storage power supplies, wind energy storage power supplies, base station energy storage power supplies, etc. in the field. In the process of assembling the battery cells into modules, it is necessary to perform spot welding on the battery cells. In the field of spot welding machine welding, people are pursuing various aspects such as high welding efficiency, small area of welding materials, and convenient debugging of welding needles of spot welding machines. A combination of products. The basic mode used in battery cell welding is to weld a pair of lug nickel sheets with the battery cell, and a single spot welding node needs to be soldered everywhere.

In order to solve the above problems, the existing production technology generally adopts double welding to carry out two spot welding on the end face of a single cell, so as to achieve spot welding of four welding points. Therefore, the existing method is not only low in welding efficiency, but also in operation During the long-term debugging of personnel and the process of changing the module alignment, due to the tedious and time-consuming debugging steps, it is easy to have inaccurate alignment and poor spot welding.

After retrieval, the application date is 2016.05.13, and the Chinese invention patent with the application number 201610319405.0 discloses a four-point welding device. Although the device can realize spot welding of four welding points at the same time and improve the efficiency of spot welding, however, the The welding device has the following defects: 1. Radial rotation is used to adjust the angle of the welding needle clamp, but in actual implementation, the angle of radial rotation is often difficult to accurately grasp, and the fast and accurate adjustment of the welding needle position cannot be realized. And the needle adjustment rate is relatively low; 2. Without using a special alignment mechanism, it is impossible to achieve accurate alignment of the position to be spot welded, and the spot welding accuracy is relatively poor; 3. The pressure control uses a linear bearing, which requires an additional rotation limit This also makes the entire pressure regulation mechanism more complicated.

Contents of the invention

The technical problem to be solved by the utility model is to provide a four-needle spot welding head device, through which the welding efficiency of the welding points can be improved, the welding quality of the welding points can be ensured, and the speed of needle adjustment can be greatly improved at the same time .

The utility model is achieved as follows: a four-pin spot welding head device, including a laser alignment mechanism, a position sensing mechanism, a fixed base, a welding needle guiding mechanism, a pressure adjustment mechanism, and a welding needle position adjustment mechanism And a fast welding needle adjustment mechanism;

The middle part of the fixed base is provided with a point welding head vertical plate, and the middle part of the spot welding head vertical plate is provided with an opening, and the fast welding pin adjustment mechanism is arranged at the front end of the opening, and the fast welding pin The center of the adjustment mechanism is provided with a guide through hole; the position sensing mechanism is arranged at the rear end of the vertical plate of the spot welding head, and the laser alignment mechanism is arranged on the fixed base, and the laser alignment mechanism is in the the rear end of the position sensing mechanism;

The welding needle position adjusting mechanism is movably connected with the welding needle guiding mechanism, and the welding needle guiding mechanism is slidably arranged on the fast welding needle adjusting mechanism; the front end of the pressure adjusting mechanism is fixed on the welding needle guiding mechanism In terms of mechanism, the end of the pressure adjustment mechanism passes through the vertical plate of the spot welding head and extends outward to the front end of the position sensing mechanism.

Further, the laser alignment mechanism includes a quick-release laser alignment block and a cross laser, a base groove is provided on the fixed base, and at least one magnet block is arranged in the base groove; the quick The detachable laser alignment block is adsorbed in the groove of the base through the magnet block; the front end of the quick-detachable laser alignment block is provided with a laser installation hole at the position aligned with the guide through hole, and the The cross laser is installed in the laser installation hole; the top of the quick release laser alignment block is provided with at least one laser for up and down adjustment jacking wire, and the side end of the quick release laser alignment block is provided with at least one laser for left and right adjustment top wire.

Further, the position sensing mechanism includes four photoelectric switches and two U-shaped mounting frames; the two U-shaped mounting frames are fixed on the rear end of the vertical plate of the spot welding head, and the two The U-shaped mounting frames are symmetrically located on both sides of the opening; the upper and lower ends of each U-shaped mounting frame are each provided with a photoelectric switch.

Further, the fast welding needle adjustment mechanism includes a welding needle needle guide block, a welding needle fast needle alignment beam and a linear sliding reference block; the rear end of the welding needle needle guide block abuts against the opening At the front end, the linear sliding reference block is butted on the front end of the needle guide block; the fast needle alignment crossbeam is inserted into the guide through hole.

Further, the front end of the welding needle guide block is provided with several butt joint protrusions, the rear end of the linear sliding reference block is provided with several butt joint gaps, the front end of the welding needle guide block and the linear sliding The rear end of the reference block is mated and docked with the docking protrusion and the docking notch.

Further, the welding needle guide mechanism includes four linear sliding guide rails, four linear sliding sliders and four moving reference blocks; the four linear sliding guide rails are respectively arranged symmetrically on both sides of the linear sliding reference block, Each of the linear sliding sliders is slidably connected to one of the linear sliding guide rails, each of the moving reference blocks is fixedly arranged on the upper end of one of the linear sliding sliders, and the middle of the upper end surface of each of the moving reference blocks All are horizontally provided with a moving groove.

Further, the welding needle position adjustment mechanism includes four chuck adapter blocks, four welding needle chucks, four first adjusting bolts, four second adjusting bolts and four spot welding welding needles; A first waist-shaped hole is arranged horizontally on the chuck adapter block, and a moving protrusion matching the moving groove is horizontally provided on the bottom of each chuck adapter block; The connecting blocks are all locked on the moving reference block through the first adjusting bolt and the first waist-shaped hole; each of the welding pin chucks is vertically provided with a second waist-shaped hole, each of the The welding pin chucks are all locked to the front end of the chuck adapter block through the second adjusting bolt and the second waist hole, and each of the spot welding welding pins is inserted into one of the welding pin clamps on the head.

Further, the pressure adjustment mechanism includes four photoelectric induction columns, four welding pin pressure springs, four first double nut groups and four second double nut groups; the front end of each photoelectric induction column is fixed on On the moving reference block, and the front end of each photoelectric induction column is equipped with a first double nut group, and each welding needle pressure spring is sleeved on one of the photoelectric induction columns; The ends of the photoelectric induction columns pass through the spot welding head vertical plate and extend outward to the front end of the position sensing mechanism, and each end of the photoelectric induction column is equipped with a second double nut group.

Further, a ball groove is provided on both sides of the linear sliding guide rail, and a number of balls are placed in each ball groove; the bottom of the linear sliding slider is provided with a sliding grooves, and both ends of the linear sliding slider are provided with a blocking piece at a position corresponding to each of the ball grooves.

The utility model has the following advantages: 1. It is equipped with a laser alignment mechanism, which can accurately align the welding spots to be spot welded, so as to improve the spot welding accuracy and spot welding quality; 2. It is equipped with a fast welding needle adjustment mechanism and a welding needle The position adjustment mechanism, in specific implementation, can quickly clamp and adjust the spot welding needles in the welding needle position adjustment mechanism for different welding needles in the fast welding needle adjustment mechanism, which can not only meet the needs of different customers 3. Simultaneous spot welding can be performed on 4 welding spots at the same time. In actual use, the spot welding rate can be increased to 1.5 to 1.8 times that of the past; 4. It is equipped with a welding needle guide mechanism and a pressure adjustment mechanism, which makes it possible not only to adjust the spot welding pressure of the spot welding needle adaptively during the spot welding operation of the welding spot, but also to ensure that the spot welding needle is It slides in a straight line without skewing; 5. It is equipped with a position sensing mechanism. During the spot welding process, it can detect whether the corresponding spot welding needle is spot welding through the photoelectric switch installed at the rear end of each photoelectric induction column. In place, so that the quality of welding can be guaranteed.

Description of drawings

The utility model will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is one of the three-dimensional state diagrams of a four-pin spot welding head device of the present invention.

Fig. 2 is the second three-dimensional state view of a four-pin spot welding head device of the present invention.

Fig. 3 is a front view of a four-pin spot welding head device of the present invention.

Fig. 4 is a structural schematic diagram of the laser alignment mechanism in the spot welding head device of the present invention.

Fig. 5 is a structural schematic diagram of the position sensing mechanism in the spot welding head device of the present invention.

Fig. 6 is a schematic diagram of the connection between the welding needle guide mechanism and the pressure adjustment mechanism in the spot welding head device of the present invention.

Fig. 7 is a structural schematic diagram of the welding needle position adjustment mechanism in the spot welding head device of the present invention.

Fig. 8 is a structural schematic diagram of the rapid welding needle adjustment mechanism in the spot welding head device of the present invention.

Fig. 9 is a schematic diagram of the connection between the welding needle guide mechanism and the fast welding needle adjustment mechanism in the spot welding head device of the present invention.

Explanation of reference signs:

100-Spot welding head device, 1-Laser alignment mechanism, 11-Quick release laser alignment block, 111-Laser installation hole, 12-Cross laser, 13-Laser up and down adjustment jackscrew, 14-Laser left and right adjustment jackscrew , 2-position sensing mechanism, 21-photoelectric switch, 22-U-shaped mounting frame, 3-fixed base, 31-base groove, 311-magnet block, 4-welding needle guide mechanism, 41-linear sliding guide rail, 411 -Ball groove, 42-Linear sliding slider, 421-Sliding groove, 422-Bracket, 43-Moving reference block, 431-Moving groove, 5-Pressure adjustment mechanism, 51-Photoelectric induction column, 52-Welding needle plus Compression spring, 53-the first double nut group, 54-the second double nut group, 6-welding needle position adjustment mechanism, 61- chuck adapter block, 611-the first waist-shaped hole, 612-moving protrusion, 62 -Welding needle chuck, 621-second waist hole, 63-first adjusting bolt, 64-second adjusting bolt, 65-spot welding welding needle, 7-fast welding needle adjustment mechanism, 71-guiding through hole, 72- Welding needle needle guide block, 721-butting protrusion, 73-welding needle fast needle alignment beam, 74-linear sliding reference block, 741-butting gap, 8-point welding head vertical plate, 81-opening hole.

detailed description

Please refer to Fig. 1 to Fig. 9, a preferred embodiment of a four-pin spot welding head device 100 of the present invention includes a laser alignment mechanism 1, a position sensing mechanism 2, a fixed base 3, a welding pin Guide mechanism 4, a pressure adjustment mechanism 5, a welding needle position adjustment mechanism 6 and a fast welding needle adjustment mechanism 7;

The middle part of the fixed base 3 is provided with a spot welding head vertical plate 8, and the middle part of the spot welding head vertical plate 8 is provided with an opening 81, and the fast welding needle adjustment mechanism 7 is arranged on the front end of the opening 81 , and the center of the fast welding needle adjustment mechanism 7 is provided with a guide through hole 71; the position sensing mechanism 2 is arranged on the rear end of the spot welding head vertical plate 8, and the laser alignment mechanism 1 is arranged on the fixed on the base 3, and make the laser alignment mechanism 1 at the rear end of the position sensing mechanism 2;

The welding needle position adjusting mechanism 6 is movably connected with the welding needle guiding mechanism 4, and the welding needle guiding mechanism 4 is slidably arranged on the fast welding needle adjusting mechanism 7; the front end of the pressure adjusting mechanism 5 is fixed on On the welding needle guide mechanism 4 , the end of the pressure adjustment mechanism 5 passes through the spot welding head vertical plate 8 and extends outward to the front end of the position sensing mechanism 2 .

in,

Please focus on referring to Figure 4, the laser alignment mechanism 1 includes a quick release laser alignment block 11 and a cross laser 12, the fixed base 3 is provided with a base groove 31, the base groove 31 is set At the tail of the fixed base 3, at least one magnet block 311 is arranged in the base groove 31; the quick-release laser alignment block 11 (the quick-release laser alignment block 11 is made of iron material) passes The magnet block 311 is adsorbed in the groove 31 of the base; the front end of the quick-release laser alignment block 11 is provided with a laser installation hole 111 at a position aligned with the guide through hole 71, and the cross laser 12 is installed in the laser installation hole 111; the top of the quick-release laser alignment block 11 is provided with at least one laser up and down adjustment top wire 13, and the laser up and down adjustment top wire 13 is used to adjust the cross laser 12. Up and down micro-adjustment, the side end of the quick-release laser alignment block 11 is provided with at least one laser left and right adjustment top wire 14, and the laser left and right adjustment top wire 14 is used for left and right fine adjustment of the cross laser 12. During specific work, when laser alignment is required, the quick-release laser alignment block 11 is placed in the groove 31 of the base, and the quick-release laser alignment block 11 is sucked by the magnet block 311, and then Utilize the cross laser cursor that cross laser 12 sends to carry out alignment, to ensure that the spot welding needle 65 is aligned with the position to be spot welded on the spot welded object (not shown), thereby improving the accuracy of spot welding; When laser alignment is required, the quick-release laser alignment block 11 is disassembled from the groove 31 of the base.

Please focus on referring to Figure 5, the position sensing mechanism 2 includes four photoelectric switches 21 and two U-shaped mounting frames 22; the two U-shaped mounting frames 22 are fixed on the vertical plate of the spot welding head 8, and make the two U-shaped mounts 22 symmetrically located on both sides of the opening 81; the upper and lower ends of each U-shaped mount 22 are respectively provided with a photoelectric switch 21. When carrying out spot welding work, the end of described pressure adjustment mechanism 5 can extend the length of about 5mm to the rear end, and this position sensing mechanism 2 can be used for sensing the length that the end of pressure adjustment mechanism 5 protrudes, to determine spot welding Is it in place.

Please refer to Fig. 8, the fast welding needle adjustment mechanism 7 includes a welding needle needle guide block 72, a welding needle fast alignment beam 73 and a linear sliding reference block 74; the welding needle needle guide block 72 The rear end is abutted against the front end of the opening 81, the linear sliding reference block 74 is butted against the front end of the welding needle guide block 72; the welding needle quick alignment beam 73 is inserted in the guide through hole 71, the guide through hole 71 can ensure that the inserted welding needle fast alignment beam 73 will not shake. During specific implementation, the spot welding welding needle 65 can be quickly clamped and adjusted according to the different welding needles inserted into the needle crossbeam 73, and after the position of the spot welding welding needle 65 is adjusted, the welding The fast needle alignment beam 73 is drawn out to facilitate laser alignment.

The front end of the welding needle guide block 72 is provided with several docking protrusions 721, and the rear end of the linear sliding reference block 74 is provided with several docking gaps 741, and the front end of the welding needle guide block 72 is connected to the The rear end of the linear sliding reference block 74 is mated and docked with the docking protrusion 721 and the docking notch 741 .

Please refer to Fig. 6, the welding pin guide mechanism 4 includes four linear sliding guide rails 41, four linear sliding sliders 42 and four moving reference blocks 43; the four linear sliding guide rails 41 are symmetrically arranged on On both sides of the linear sliding reference block 74, each of the linear sliding sliders 42 is slidably connected to a linear sliding guide rail 41, and each of the moving reference blocks 43 is fixedly arranged on one of the linear sliding sliders 42. The upper end of each moving datum block 43 is horizontally provided with a moving groove 431 in the middle of the upper end surface. When working, the welding needle guiding mechanism 4 can realize linear sliding through the linear sliding guide rail 41 and the linear sliding slider 42, which can effectively ensure that the spot welding welding needle 65 slides in a straight line during spot welding without skewing.

Both sides of described linear sliding guide rail 41 are respectively provided with a ball groove 411, and all are placed with several balls (not shown) in each ball groove 411; The sliding groove 421 that the sliding guide rail 41 matches, and the two ends of the linear sliding slider 42 are all provided with a stop piece 422 at the position corresponding to each of the ball grooves 411, and the stop piece 422 is used to prevent the ball from running out Ball groove 411.

Please focus on referring to FIG. 7 , the welding needle position adjustment mechanism 6 includes four chuck adapter blocks 61, four welding needle chucks 62, four first adjusting bolts 63, four second adjusting bolts 64 and Four spot welding welding pins 65; all horizontally be provided with a first waist-shaped hole 611 on each described chuck adapter block 61, and the bottom of each described chuck adapter block 61 is horizontally provided with one and described moving concave The moving protrusion 612 matched with the groove 431, when adjusting the position, the moving protrusion 612 will slide along the moving groove 431; each chuck adapter block 61 passes through a first adjusting bolt 63 and a second A waist-shaped hole 611 is locked on one of the moving reference blocks 43; a second waist-shaped hole 621 is vertically arranged on each of the welding needle chucks 62, and each of the welding needle chucks 62 passes through a The second adjusting bolt 64 and the second waist-shaped hole 621 are locked on the front end of a chuck adapter block 61 , and each of the spot welding pins 65 is inserted into a welding pin chuck 62 . The welding needle position adjustment mechanism 6 can adjust the position of the spot welding welding needle 65 within a certain range according to the different needs of customers. For example, when the lateral position of the spot welding welding needle 65 needs to be adjusted, the first adjustment Bolt 63 unscrews, then moves the position of collet transfer block 61 laterally, to realize the lateral adjustment of spot welding needle 65, and after adjusting the position of spot welding welding needle 65, just the first adjusting bolt 63 is tightened on On the first waist-shaped hole 611; when the vertical position of the spot welding needle 65 needs to be adjusted, the second adjusting bolt 64 is unscrewed, and then the position of the welding needle chuck 62 is moved vertically to realize spot welding The vertical adjustment of the welding pin 65, and after adjusting the position of the spot welding welding pin 65, just tighten the second adjusting bolt 64 on the second waist-shaped hole 621 and get final product. The cooperation of the position adjustment mechanism 6 and the quick welding needle adjustment mechanism 7 realizes the quick adjustment of the spot welding welding needle 65 .

Please refer to FIG. 6 , the pressure adjustment mechanism 5 includes four photoelectric induction columns 51, four welding pin pressure springs 52, four first double nut groups 53 and four second double nut groups 54; The front ends of the photoelectric induction columns 51 are all fixed on the moving reference block 43, and each front end of the photoelectric induction columns 51 is equipped with a first double nut group 53, and each welding pin pressurizes the spring 52 are all sleeved on a described photoelectric induction column 51; The end of each described photoelectric induction column 51 all passes through described spot welding head riser 8 and extends outwards to the front end of described position sensing mechanism 2 (promptly extends to the front end of the photoelectric switch 21, so that when spot welding, each photoelectric switch 21 can be used to detect whether each spot welding needle 65 is spot welded in place), and the end of each photoelectric induction column 51 is equipped with a Describe the second double nut group 54. When working, the pressure adjustment mechanism 5 can adjust the pressure of the spot welding needle 65 during spot welding, specifically the pressure of the welding needle pressurizing spring 52 can be realized by the first double nut group 53 and the second double nut group 54 adjustment.

The working principle of the present utility model is as follows: when the spot welding head device 100 needs to be used, at first, four spot welding welding needles 65 need to be respectively assembled on the welding needle chuck 62, and when assembling the spot welding welding welding needle 65, it is necessary to Note that the lengths of the front ends of the four spot welding needles 65 are the same; Insert the needle crossbeam 73 into the guide through hole 71 from the rear end, and move the positions of the four chuck adapter blocks 61 and the four welding needle chucks 62, so that the spot welding needle 65 is quickly attached to the welding needle fast alignment beam 73 on the outer surface, so as to realize the fast clamping and adjustment of the spot welding needle 65; then, the four first adjusting bolts 63 and the four second adjusting bolts 64 are all tightened, and the welding needle is quickly aligned with the needle beam 73 Take it out to complete the clamping and adjustment work of the spot welding needle 65.

When using this spot welding head device 100 to carry out spot welding operations, at first this spot welding head device 100 will be installed on the use equipment (not shown), at the same time, the laser alignment mechanism 1 is installed on the base of the fixed base 3 afterbody In the groove 31; Then, utilize the cross laser cursor that cross laser 12 emits to carry out alignment, make four spot welding welding pins 65 be aligned one by one with the four point positions that need spot welding on the object to be spot welded respectively , after the laser alignment is completed, the laser alignment mechanism 1 is removed; then, the spot welding pressure suitable for spot welding is adjusted through the pressure adjustment mechanism 5, specifically through the first double nut group 53 and the second double nut group 54 To realize the pressure adjustment of the welding needle pressurizing spring 52; at last, the spot welding head device 100 can be started to carry out the spot welding operation, and in the process of spot welding, the photoelectric switch arranged at the rear end of each photoelectric induction column 51 can 21 to detect whether the corresponding spot welding needle 65 is spot welded in place, like this, when finding spot welded spot welds that are not in place, it can be processed in time (such as repair welding), to ensure that the quality of each spot weld can be guaranteed .

In a word, the utility model has the following beneficial effects: 1. It is equipped with a laser alignment mechanism, which can accurately align the welding spots to be spot welded, so as to improve the spot welding accuracy and spot welding quality; 2. It is equipped with a fast welding needle adjustment mechanism And the welding needle position adjustment mechanism, in the specific implementation, the spot welding welding needle in the welding needle position adjustment mechanism can be quickly clamped and adjusted for different welding needles in the fast welding needle adjustment mechanism. Meet the needs of different customers, and can greatly improve the speed of needle adjustment; 3. Simultaneous spot welding can be performed on 4 welding points at the same time. In actual use, the spot welding speed can be increased to 1.5 to 1.8 times the previous one. ; 4. A welding needle guide mechanism and a pressure adjustment mechanism are provided, which not only can adapt the spot welding pressure of the spot welding needle to the spot welding pressure when performing the spot welding operation of the welding spot, but also can ensure that the spot welding welding needle is in the When spot welding, it slides in a straight line without skewing; 5. It is equipped with a position sensing mechanism. During the spot welding process, the corresponding spot welding needle can be detected by the photoelectric switch set at the rear end of each photoelectric induction column Whether spot welding is in place so that the quality of welding can be guaranteed.

Although the specific embodiments of the present utility model have been described above, those skilled in the art should understand that the specific embodiments we describe are only illustrative, rather than used to limit the scope of the present utility model. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present utility model shall fall within the protection scope of the claims of the present utility model.

Claims (9)

1. A four-needle point welding head device is characterized in that: comprises a laser alignment mechanism, a position sensing mechanism, a fixed base, a welding pin guide mechanism, a pressure adjusting mechanism, a welding pin position adjusting mechanism and a rapid welding pin adjusting mechanism;

a welding head vertical plate is vertically arranged in the middle of the fixed base, an opening is formed in the middle of the welding head vertical plate, the rapid welding needle adjusting mechanism is arranged at the front end of the opening, and a guide through hole is formed in the center of the rapid welding needle adjusting mechanism; the position sensing mechanism is arranged at the rear end of the spot welding head vertical plate, the laser alignment mechanism is arranged on the fixed base, and the laser alignment mechanism is positioned at the rear end of the position sensing mechanism;

the welding pin position adjusting mechanism is movably connected with the welding pin guiding mechanism, and the welding pin guiding mechanism is arranged on the rapid welding pin adjusting mechanism in a sliding mode; the front end of the pressure adjusting mechanism is fixed on the welding needle guide mechanism, and the tail end of the pressure adjusting mechanism penetrates through the spot welding head vertical plate and extends outwards to the front end of the position sensing mechanism.

2. A four-pin bonding tool assembly according to claim 1, wherein: the laser alignment mechanism comprises a quick-release laser alignment block and a cross laser, a base groove is formed in the fixed base, and at least one magnet block is arranged in the base groove; the quick-dismantling laser alignment block is adsorbed in the base groove through the magnet block; a laser mounting hole is formed in the front end of the quick-release type laser alignment block at a position aligned with the guide through hole, and the cross laser is mounted in the laser mounting hole; the top of the quick-release type laser alignment block is provided with at least one laser vertical adjustment jackscrew, and the side end of the quick-release type laser alignment block is provided with at least one laser horizontal adjustment jackscrew.

3. A four-pin bonding tool assembly according to claim 1, wherein: the position sensing mechanism comprises four photoelectric switches and two U-shaped mounting frames; the two U-shaped mounting frames are fixedly arranged at the rear end of the spot welding head vertical plate, and are symmetrically positioned at two sides of the opening; and the upper end surface and the lower end surface of each U-shaped mounting rack are respectively provided with one photoelectric switch.

4. A four-pin bonding tool assembly according to claim 1, wherein: the rapid welding pin adjusting mechanism comprises a welding pin aligning guide block, a welding pin rapid aligning beam and a linear sliding reference block; the rear end of the welding needle guide block abuts against the front end of the open hole, and the linear sliding reference block abuts against the front end of the welding needle guide block; the welding needle is inserted into the guide through hole quickly relative to the needle cross beam.

5. A four-pin bonding tool assembly according to claim 4, wherein: the front end of the welding needle guide block is provided with a plurality of butt joint bulges, the rear end of the linear sliding reference block is provided with a plurality of butt joint notches, and the front end of the welding needle guide block is in butt joint with the rear end of the linear sliding reference block through the butt joint bulges and the butt joint notches in a matching mode.

6. A four-pin bonding tool assembly according to claim 4, wherein: the welding pin guide mechanism comprises four linear sliding guide rails, four linear sliding sliders and four moving reference blocks; the four linear sliding guide rails are symmetrically arranged on two sides of the linear sliding reference block respectively, each linear sliding slide block is connected with one linear sliding guide rail in a sliding mode, each moving reference block is fixedly arranged at the upper end of one linear sliding slide block, and a moving groove is transversely formed in the middle of the upper end face of each moving reference block.

7. A four-pin bonding tool assembly according to claim 6, wherein: the welding pin position adjusting mechanism comprises four chuck transfer blocks, four welding pin chucks, four first adjusting bolts, four second adjusting bolts and four spot welding pins; each chuck transfer block is transversely provided with a first waist-shaped hole, and the bottom of each chuck transfer block is transversely provided with a moving bulge matched with the moving groove; each chuck switching block is locked on one movable reference block through one first adjusting bolt and one first waist-shaped hole; every all vertically be provided with a second waist type hole on the welding needle chuck, every the welding needle chuck all through one the second adjusting bolt and second waist type hole lock pay in one the front end of chuck switching piece, every the spot welding needle all inserts and locates one on the welding needle chuck.

8. A four-pin bonding tool assembly according to claim 6, wherein: the pressure adjusting mechanism comprises four photoelectric induction columns, four welding pin pressurizing springs, four first double-nut groups and four second double-nut groups; the front end of each photoelectric sensing column is fixed on the movable reference block, the front end of each photoelectric sensing column is provided with a first double-nut group in a matching mode, and each welding pin pressurizing spring is sleeved on one photoelectric sensing column; the tail end of each photoelectric sensing column penetrates through the spot welding head vertical plate and extends outwards to the front end of the position sensing mechanism, and the tail end of each photoelectric sensing column is provided with the second double-nut group in a matched mode.

9. A four-pin bonding tool assembly according to claim 6, wherein: two sides of the linear sliding guide rail are respectively provided with a ball groove, and a plurality of balls are placed in each ball groove; the bottom of the linear sliding block is provided with a sliding groove matched with the linear sliding guide rail, and two ends of the linear sliding block are provided with a blocking piece at the position corresponding to each ball groove.