CN105750731A - Laser welding device for automobile shift fork - Google Patents

Abstract

The invention relates to the technical field of laser processing, and discloses a laser welding device for an automobile shift fork. The welding device includes a laser, an optical fiber, a laser welding head, a manipulator, a PLC control system and a welding auxiliary device, wherein the workpiece is installed on the welding auxiliary device; the laser is used to emit laser light; the optical fiber transmits the laser light to the laser welding head; The laser welding head is used to collimate and focus the laser and act on the workpiece for processing; the manipulator drives the laser welding head to move; the welding auxiliary device is used to rotate, position and compress the workpiece; the PLC control system is respectively connected to the laser, manipulator and The welding auxiliary device realizes automatic control. The welding device of the invention has the advantages of simple structure, convenient operation, high degree of automation and high welding strength and precision.

Description

A laser welding device for an automobile shift fork

technical field

The invention relates to the technical field of laser welding, and more specifically, relates to a laser welding device for an automobile shift fork.

Background technique

The car shift fork is a very important part in the car gearbox, mainly used to move the sliding gear and change its position on the gear shaft. An automobile shift fork generally includes a spring plate 72 and a locking plate 73 (see FIG. 2 ), both of which need to be welded on the control shaft 71 , and the requirements for welding precision and welding strength are high. However, the traditional automotive shift fork welding device has poor welding precision, large deformation, poor welding strength, poor surface shape, and is not easy to automate. It cannot meet the requirements of modern industry and life for high quality, high precision, high efficiency and beauty.

Contents of the invention

The object of the present invention is to solve the technical problems in the prior art and provide a laser welding device for an automobile shift fork, which has simple structure, convenient operation, high degree of automation and high welding strength and precision.

In order to solve the problems raised above, the technical solution adopted in the present invention is:

A laser welding device for an automobile shift fork, the welding device includes a laser, an optical fiber, a laser welding head, a manipulator, a PLC control system and a welding auxiliary device, wherein a workpiece is installed on the welding auxiliary device;

The laser is used to emit laser light; the optical fiber transmits the laser light to the laser welding head; the laser welding head is used to collimate and focus the laser and act on the workpiece for processing; the manipulator drives the laser welding head to move; the welding auxiliary device is used It is used to rotate, position and press the workpiece; the PLC control system is respectively connected to the laser, manipulator and welding auxiliary device to realize automatic control.

The welding auxiliary device includes a main drive module, a slave drive module, an auxiliary positioning module and a connecting base plate, wherein the main drive module and the slave driving module are arranged on the upper end surface of the connecting base plate, and the auxiliary positioning module is arranged on the lower end face of the connecting base plate;

The main driving module is used to drive the workpiece to rotate, and the slave driving module and the auxiliary positioning module are used to position and compress the workpiece.

The main drive module includes a servo motor, a fastening sleeve, a connecting sleeve, a profiling sleeve, a first guide rail, a first slider, a mounting plate, a cylinder mounting plate and a cylinder;

The first guide rail and the cylinder mounting plate are fixed on the connection base plate, the first slider is arranged on the first guide rail; the cylinder is arranged on the cylinder installation plate, and the installation plate is arranged on the first slider and connected to the output end of the cylinder; the servo The motor is fixed on the mounting plate, the connecting sleeve is set on the output shaft of the servo motor through the tightening sleeve, the profiling sleeve is set in the inner cavity of the connecting sleeve, and the inner hole of the profiling sleeve is matched with the workpiece; the servo motor and the cylinder are connected to the PLC Control System.

A notch is formed in the center of the connecting sleeve along the axial direction.

The slave drive module includes a reference shaft, a bearing seat, a positioning cylinder, a positioning cylinder mounting seat, a mounting seat, a second slider and a second guide rail;

The positioning cylinder mounting seat is arranged on the connecting substrate, and the positioning cylinder is installed on the positioning cylinder mounting seat and connected to the PLC control system; the second guide rail is also arranged on the connecting substrate, and the second slide block is arranged on the second guide rail, and the mounting seat It is arranged on the second slider and connected with the output end of the positioning cylinder; the bearing seat is arranged on the mounting seat, and the reference axis is horizontally arranged on the bearing seat and corresponds to the position of the workpiece.

The slave drive module also includes a pressing block, a pressing cylinder, a connecting rod, a pin seat and a positioning pin;

The compression cylinder and pin seat are set on the mounting seat, and the positioning pin is movably set on the pin seat, and cooperates with the positioning hole on the workpiece; the pressing block is set on the outer surface of the reference shaft, and is hinged on the bearing seat. The ends are respectively connected to the positioning pin and the end of the briquetting block, and the end face of the end of the briquetting block is also connected to the output end of the compression cylinder; the compression cylinder is connected to the PLC control system.

The position of the pin seat on the mounting seat can be adjusted.

The auxiliary positioning module includes a mounting seat, an auxiliary positioning cylinder, a guide rail, a slider, a connecting plate, an auxiliary positioning block, a rotating support block, an auxiliary pressing cylinder, a rotating pressing block and a bracket, wherein the mounting seat is an L-shaped structure;

The third guide rail is arranged on one side of the long side of the mounting seat, the third slider is installed on the third guide rail, and the auxiliary positioning cylinder is installed on the short side of the mounting seat; the bottom surface of the connecting plate is fixed with the third slider, and It is connected with the output shaft of the auxiliary positioning cylinder, and the auxiliary positioning block is fixed on the connecting plate;

The rotating support block is arranged on the end of the long side of the mounting seat, and the compression cylinder is arranged on the other side of the long side of the mounting seat through the bracket. One end of the rotating pressing block is hinged on the rotating supporting block, and the other end is connected to the pressing cylinder; The auxiliary positioning module passes through the connecting substrate and is arranged on the connecting substrate through a bracket; the auxiliary positioning cylinder and the pressing cylinder are connected to the PLC control system.

The welding device uses two lasers and two laser welding heads, and the manipulator simultaneously drives the two laser welding heads for welding.

Compared with prior art, the beneficial effect of the present invention is:

1. In the present invention, the workpiece is set on the welding auxiliary device to realize the rotation and positioning of the workpiece. The laser welding head is driven to the preset position automatically by the manipulator, and the laser emits short-time pulsed laser light, which is transmitted by the optical fiber and focused by the welding head. The welding position forms laser spot welding, and the structure of the whole welding device is simple and easy to operate; in addition, the automatic control of the welding device is realized through the PLC control system, thereby improving the welding accuracy and welding strength of the whole device.

2. The welding auxiliary device in the present invention adopts the main drive module, the slave drive module and the auxiliary positioning module to realize the rotation and positioning of the workpiece. The main drive module completes the workpiece rotation through the servo motor and cylinder, and cooperates with the guide rail and the slider; the slave drive module And the auxiliary positioning module completes the positioning of the control shaft and the locking plate compression through the positioning cylinder and the compression cylinder through the positioning pin and the pressing block from the driving module; the auxiliary positioning module also completes the spring plate and the locking plate shaft by rotating the pressing block Press against the positioning and locking plate; therefore, the entire welding auxiliary device has a simple structure, is easy to operate and can reliably complete the positioning, rotation and pressing of the workpiece, thereby ensuring the welding reliability of the welding device.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the laser welding device for an automobile shift fork according to the present invention.

Fig. 2 is a schematic diagram of the structure of the workpiece to be processed in the present invention.

Fig. 3 is a schematic structural view of the welding auxiliary device of the present invention.

Fig. 4 is a schematic structural diagram of the main driving module of the present invention.

Fig. 5 is a schematic structural diagram of the slave driving module of the present invention.

Fig. 6 is a schematic structural diagram of the auxiliary positioning module of the present invention.

Description of reference signs: 1-laser, 2-optical fiber, 3-laser welding head, 4-manipulator, 5-PLC control system, 6-welding auxiliary device, 61-main drive module, 62-slave drive module, 63-auxiliary Positioning module, 64-connecting base plate, 611-servo motor, 612-tightening sleeve, 613-connecting sleeve, 614-profiling bushing, 615-first guide rail, 616-first slider, 617-installation plate, 618 -Cylinder mounting plate, 619-cylinder, 621-briquetting block, 622-reference shaft, 623-bearing seat, 624-pressing cylinder, 625-positioning cylinder, 626-positioning cylinder mounting seat, 627-mounting seat, 628-th Second slider, 629-second guide rail, 6210-connecting rod, 6211-pin seat, 6212-locating pin, 631-mounting seat, 632-auxiliary positioning cylinder, 633-third guide rail, 634-third slider, 635 -connecting plate, 636-auxiliary positioning block, 637-rotary support block, 638-auxiliary compression cylinder, 639-rotary pressing block, 640-bracket, 71-control shaft, 72-spring plate, 73-locking plate

detailed description

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

Referring to shown in Fig. 1, a kind of automobile shift fork laser welding device provided by the present invention, this welding device comprises laser 1, optical fiber 2, laser welding head 3, manipulator 4, PLC control system 5 and welding auxiliary device 6, wherein workpiece installation On welding aid 6.

The laser 1 is used to convert electrical energy into light energy and emit laser light; the optical fiber 2 is used to transmit laser light, one end of the optical fiber 2 is connected to the laser 1, and the other end is connected to the laser welding head 3; the laser welding head 3 is used for Collimate and focus the laser to obtain high-energy-density laser, which can be used for workpiece welding; the manipulator 4 is used to install the laser welding head 3, and drives the laser welding head 3 to complete the corresponding walking track; the PLC control system 5 respectively connect the laser 1, the manipulator 4 and the welding auxiliary device 6 to realize automatic control.

As shown in accompanying drawing 3, described auxiliary welding device 6 comprises main drive module 61, slave drive module 62, auxiliary positioning module 63 and connection base plate 64, wherein connection base plate 64 main drive module 61, slave drive module 62, auxiliary positioning The modules 63 are connected together by bolts and positioning pins, that is, the main driving module 61 and the slave driving module 62 are arranged on the upper end surface of the connecting base plate 64 , and the auxiliary positioning module 63 is arranged on the middle part of the lower end surface of the connecting base plate 64 .

As shown in Figure 4, the main drive module 61 is mainly used to drive the rotation of the workpiece to cooperate with the manipulator 4 to complete the welding of the circular seam, including a servo motor 611, a fastening sleeve 612, a connecting sleeve 613, and a profiling shaft sleeve. 614 , a first guide rail 615 , a first slider 616 , a mounting plate 617 , a cylinder mounting plate 618 and a cylinder 619 .

The first guide rail 615 and the cylinder mounting plate 618 are fixed on the connection base plate 64, and the first slider 616 is arranged on the first guide rail 615 and can slide along the direction of the guide rail. The mounting plate 617 is a structural member welded by steel plates, fixed on the first slider 615, the servo motor 611 can be controlled by the PLC control system 5, fixed on the mounting plate 617 and used to drive the workpiece to rotate accurately; the tightening sleeve 612 connects the output shaft of the servo motor 611 with the connection sleeve 613 through screws; the profiling shaft sleeve 614 is connected with the connection sleeve 613 through a key, and the inner hole of the profiling shaft sleeve 614 is according to the control shaft 71 (refer to FIG. 2 ) It is manufactured by profiling. When installing, one end of the control shaft 71 is inserted into the profiling sleeve 614. When the profiling sleeve 614 rotates, it can drive the control shaft 71 to rotate without relative rotation.

The cylinder 619 is fixed on the cylinder mounting plate 618 with bolts and connected to the PLC control system 5. Its effect is to drive the mounting plate 617 to slide on the first guide rail 615, so that the profiling shaft sleeve 614 is pressed or loosened the control shaft 71.

In the above, the center of the connecting sleeve 613 is machined to form a gap along the axial direction. Since the profiling sleeve 614 is arranged in the inner cavity of the connecting sleeve 613 , the installation and disassembly of the profiling sleeve 614 is facilitated.

As shown in Figure 5, the slave drive module 62 is mainly used to axially position the control shaft 71, press the locking plate 73, and cooperate with the main drive to rotate the workpiece, including a pressing block 621, a reference shaft 622 , Bearing seat 623, compression cylinder 624, positioning cylinder 625, positioning cylinder mounting seat 626, mounting seat 627, second slide block 628, second guide rail 629, connecting rod 6210, pin seat 6211 and positioning pin 6212.

The positioning cylinder mount 626 is fixed on the connecting base plate 64 , and the positioning cylinder 625 is mounted on the positioning cylinder mount 626 . The second guide rail 629 is also fixed on the connection base plate 64, and the second sliding block 628 is arranged on the second guide rail 629 and freely slides along the direction of the guide rail. The mounting seat 627 is a structural member welded by steel plates, and is fixed on the second slider 628 by bolts. As a carrier, the compression cylinder 624, the bearing seat 623 and the pin seat 6211 are all fixed on the mounting seat 627. The bearing seat 623 is located above the pin seat 6211 , the mounting seat 627 is connected to the output end of the positioning cylinder 625 , and the positioning cylinder 625 can drive the mounting seat 627 to move along the second guide rail 629 .

A copper sleeve is installed in the pin seat 6211, and the positioning pin 6212 is installed in the copper sleeve of the pin seat 6211, and can slide freely in the axial direction. The position of the pin seat 6211 on the mounting seat 627 is adjustable, so it is convenient to adjust the positioning pin 6212 location. The positioning pin 6212 is used for positioning the locking plate 73, that is, the positioning pin 212 cooperates with the positioning hole on the locking plate 73, so that the relative position between the locking plate 73 and the control shaft 71 is fixed, and the positioning pin 6212 is hardened and chrome-plated on the surface. After that, it has high wear resistance.

The reference shaft 622 is used to axially position the control shaft 71 and assist the main drive module 61 to rotate the workpiece. The reference shaft 622 is arranged on the bearing seat 623 through a bearing, that is, the reference shaft 622 can rotate freely in the axial direction. Corresponds to the position of the control shaft 71 . The pressing block 621 is sleeved on the outer surface of the reference shaft 622 and hinged on the bearing seat 623 for pressing the locking plate 73 tightly.

One end of the connecting rod 6210 is connected to the positioning pin 6212 , and the other end is connected to the end of the pressing block 621 , and the end surface of the end of the pressing block 621 is also connected to the output end of the pressing cylinder 624 . When the pressing cylinder 624 drives the pressing block 621 to move, it can simultaneously drive the positioning pin 6212 to move to realize the positioning of the locking plate 73 . The compression cylinder 624 and the positioning cylinder 625 are also connected to the PLC control system 5 .

As shown in Figure 6, the auxiliary positioning module 63 is mainly used to axially position the spring plate 72 and the locking plate 73, and press the spring plate 72, including a mounting seat 631, an auxiliary positioning cylinder 632, and a third guide rail. 633, the third slide block 634, connecting plate 635, auxiliary positioning block 636, rotating support block 637, auxiliary pressing cylinder 638, rotating pressing block 639 and support 640, wherein mounting seat 631 is welded by steel plate, fixed on the On the connection substrate 64 , the mounting seat 631 is an L-shaped structure.

The third guide rail 633 is fixed on one side of the long side of the mounting seat 631 , and the third sliding block 634 is installed on the third guide rail 633 and can slide freely along the third guide rail 633 . The auxiliary positioning cylinder 632 is installed on the short side of the mounting seat 631 . The bottom surface of the connecting plate 635 is fixed to the third sliding block 634 and also connected to the output shaft of the auxiliary positioning cylinder 632 . The auxiliary positioning block 636 is fixed on the connecting plate 635 for the axial positioning of the spring plate 72 and the locking plate 73 , and is driven to a set position by the auxiliary positioning cylinder 632 .

The rotating support block 637 is fixed on the end of the long side of the mounting seat 631, and a rotating shaft is arranged on it. The auxiliary pressing cylinder 638 is used to drive the pressing block 639 to press the spring plate 72 , which is arranged on the other side of the long side of the mounting base 631 through the bracket 640 . One end of the rotary pressing block 639 is installed on the rotating shaft of the rotating support block 637, and one end is connected with the auxiliary pressing cylinder 638, which can drive the rotating pressing block 639 to rotate around the rotating shaft to compress the spring plate. The auxiliary positioning cylinder 634 and the auxiliary pressing cylinder 632 are also connected to the PLC control system 5 .

The entire auxiliary positioning module 63 passes through the connecting base plate 64 and is fixed on the connecting base plate through a bracket. The end of the rotating pressing block 639 and the top end of the auxiliary positioning block 636 cooperate with the spring plate 72 and the locking plate 73 respectively.

The working principle of the present invention is as follows:

Manually put the profiling shaft sleeve 614, the spring plate 72 and the locking plate 73 on the control shaft 71, manually press the "ready" button, the PLC control system 5 gives a command, and the auxiliary positioning cylinder 632 of the auxiliary positioning module 63 takes in air , push the auxiliary positioning block 636 to the set position; manually place the workpiece on the auxiliary positioning block 636 so that the spring plate 72 and the locking plate 73 are respectively located on both sides of the auxiliary positioning block 636 .

Air intake from the positioning cylinder 625 of the driving module 62 pushes the mounting base 627 and the reference shaft 622 on it to move to the set position; the air cylinder 619 on the main driving module 61 pushes the mounting plate 617, the profiling shaft sleeve 614 and The control shaft 71 moves in the axial direction, so that the reference plane of the control shaft 71 is positioned and pressed against the reference plane of the reference shaft 622 . At this time, the intake air from the compression cylinder 624 on the drive module 62 pushes the briquetting block 621 and the positioning pin 6212 to move forward, so that the locating pin 6212 is inserted into the positioning hole of the locking plate 73, and the briquetting block 621 will be locked. Plate 73 is compressed and fixed. The auxiliary pressing cylinder 638 on the auxiliary positioning module 63 takes in air, and drives the rotating pressing block 639 to rotate around the rotation axis of the rotating supporting block 637, so that the rotating pressing block 639 compresses and fixes the spring plate 72 well.

When the parts are in place, the PLC control system 5 gives a command to control the manipulator 4 to drive the laser welding head 3 to move to the set position on the left side of the spring plate 72, and the laser 1 emits a short-time pulse laser, which is transmitted by the optical fiber 2 and then welded by the laser. Focusing in the head 3, the focused laser is irradiated at the contact between the control shaft 71 and the spring plate 72 at a certain angle to the axis of the workpiece to form laser spot welding. Control the manipulator 4 to drive the laser welding head 3 to move to another set position on the left side to complete laser spot welding at another position. After more than 2 times of laser spot welding, the spring plate 72 is welded on the control shaft 71, but still Not very firmly connected together. Control the manipulator 4 to drive the laser welding head 3 to move to the set position on the left side of the locking plate 73, so that the laser beam forms a certain angle with the axis of the workpiece, and the laser 1 emits a short-time pulse laser to complete a laser spot welding, which is carried out at multiple positions After laser spot welding, the locking plate 73 is welded on the control shaft 71, but it is not connected together very firmly.

In order to weld the spring plate 72 and the locking plate 73 firmly on the control shaft 71, a continuous circular weld seam should be formed. After the laser spot welding is completed, the PLC control system 5 issues an order to make the compression cylinder 624 and the auxiliary compression cylinder 638 exhaust simultaneously, so that the positioning pin 6212 is withdrawn, the briquetting block 621 and the rotary briquetting block 639 are released, and the auxiliary positioning cylinder 632 is rowed. Gas, make the auxiliary positioning block 636 move downwards, exit the positioning area. After the above-mentioned three cylinders are in place, the PLC control system 5 gives an order to make the manipulator 4 drive the laser welding head 3 to move to the left side of the locking plate 73, and keep the laser incident direction during laser spot welding, and the laser 1 emits laser light. Simultaneously, the servo motor 611 drives the control shaft 71 to start rotating. When the servo motor 611 drives the control shaft 71 to rotate once, the laser beam forms a continuous circular weld at the contact position between the locking plate 73 and the control shaft 71 . Similarly, the manipulator 4 drives the laser welding head 3 to move to the left side of the spring plate 72 to complete the continuous laser welding of the spring plate 72 and the control shaft 71 .

After the welding is completed, the air cylinder 619 and the positioning cylinder 625 are exhausted, the reference shaft 622 and the connecting sleeve 613 are withdrawn, the welded workpiece is taken off, and the profiling shaft sleeve 614 is removed from the welded workpiece. The profiling shaft sleeve 614, the spring plate 72 and the locking plate 73 are installed on the next control shaft 71 ready to be welded, and placed together on the welding auxiliary device 6, ready for welding.

The present invention can increase the number of lasers 1, optical fibers 2, and laser welding heads 3 according to actual needs, so that one manipulator 4 drives two laser welding heads 3 to perform welding at the same time, that is, the two laser welding heads 3 simultaneously perform welding on the spring plate 72 and the lock respectively. The stop plate 73 is subjected to laser spot welding or laser continuous welding, thereby improving the welding efficiency of the entire welding device.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (9)

1. an automobile shift fork laser soldering device, it is characterized in that: this welder includes laser instrument (1), optical fiber (2), laser welding system (3), mechanical hand (4), PLC control system (5) and auxiliary welding equipment (6), and wherein workpiece is arranged on auxiliary welding equipment (6)；

Described laser instrument (1) is used for launching laser；Optical fiber (2) is by described Laser Transmission to laser welding system (3)；Laser welding system (3) acts on after laser alignment being focused on and is processed on workpiece；Mechanical hand (4) drives laser welding system (3) to move；Auxiliary welding equipment (6) is for rotating workpiece, position and compressing；PLC control system (5) connecting laser (1), mechanical hand (4) and auxiliary welding equipment (6) respectively realize Automated condtrol.

2. automobile shift fork laser soldering device according to claim 1, it is characterized in that: described auxiliary welding equipment (6) include main driving module (61), from drive module (62), auxiliary positioning module (63) and connection substrate (64), wherein main driving module (61) and from drive module (62) be arranged on connect substrate (64) upper surface, auxiliary positioning module (63) be arranged on connect substrate (64) lower surface；

Described main driving module (61) is used for driving workpiece to rotate, from driving module (62) and auxiliary positioning module (63) for workpiece being positioned and compressing.

3. automobile shift fork laser soldering device according to claim 2, it is characterised in that: described main driving module (61) includes servomotor (611), adapter sleeve (612), adapter sleeve (613), profiling axle sleeve (614), the first guide rail (615), the first slide block (616), installing plate (617), cylinder mounting plate (618) and cylinder (619)；

Described first guide rail (615) and cylinder mounting plate (618) are fixed in connection substrate (64), and the first slide block (616) is arranged on the first guide rail (615)；Cylinder (619) is arranged on cylinder mounting plate (618), and installing plate (617) is arranged on the first slide block (616) and connects the outfan of cylinder (619)；Servomotor (611) is fixed on installing plate (617), adapter sleeve (613) is arranged on the output shaft of servomotor (611) by adapter sleeve (612), profiling axle sleeve (614) is arranged on adapter sleeve (613) inner chamber, the endoporus of profiling axle sleeve (614) and work pieces mate；Servomotor (611) and cylinder (619) connect PLC control system (5).

4. automobile shift fork laser soldering device according to claim 3, it is characterised in that: described adapter sleeve (613) is centrally along being axially processed to form breach.

5. the automobile shift fork laser soldering device according to Claims 2 or 3, it is characterised in that: described from driving module (62) to include reference axis (622), bearing block (623), positioning cylinder (625), positioning cylinder mounting seat (626), mounting seat (627), the second slide block (628) and the second guide rail (629)；

Described positioning cylinder mounting seat (626) is arranged in connection substrate (64), and positioning cylinder (625) is arranged on positioning cylinder mounting seat (626) and above and connects PLC control system (5)；Second guide rail (629) is also disposed at connecting on substrate (64), second slide block (628) is arranged on the second guide rail (629), and mounting seat (627) is arranged on the second slide block (628) and above and is connected with the outfan of positioning cylinder (625)；Bearing block (623) is arranged in mounting seat (627), and reference axis (622) is horizontally set on bearing block (623), and corresponding with the location of workpiece.

6. automobile shift fork laser soldering device according to claim 5, it is characterised in that: described from driving module (62) also to include briquetting (621), compression cylinder (624), connecting rod (6210), key seat (6211) and alignment pin (6212)；

Compression cylinder (624) and key seat (6211) are arranged in mounting seat (627), and alignment pin (6212) is movably arranged on key seat (6211), and coordinates with the hole, location on workpiece；Briquetting (621) is sleeved on the outer surface of reference axis (622), and it is hinged on bearing block (623), the two ends of connecting rod (6210) connect alignment pin (6212) and the end of briquetting (621) respectively, and the end face of briquetting (621) described end is also connected with the outfan of compression cylinder (624)；Compression cylinder (624) connects PLC control system (5).

7. automobile shift fork laser soldering device according to claim 5, it is characterised in that: the described key seat (6211) position in mounting seat (627) can be adjusted.

8. the automobile shift fork laser soldering device according to claim 2 or 7, it is characterized in that: described auxiliary positioning module (63) includes mounting seat (631), auxiliary positioning cylinder (632), guide rail (633), slide block (634), connecting plate (635), auxiliary positioning block (636), rotates a bracer (637), auxiliary compression cylinder (638), rotates briquetting (639) and support (640), and wherein mounting seat (631) is L-shaped structure；

Described 3rd guide rail (633) is arranged on a side on mounting seat (631) long limit, 3rd slide block (634) is arranged on the 3rd guide rail (633), and auxiliary positioning cylinder (632) is arranged on the minor face of mounting seat (631)；Connecting plate (635) bottom surface is fixed with the 3rd slide block (634), is also connected with the output shaft of auxiliary positioning cylinder (632), and auxiliary positioning block (636) is fixed on connecting plate (635)；

Rotate a bracer (637) and be arranged on the end on mounting seat (631) long limit, compression cylinder (638) is arranged on the another side on mounting seat (631) long limit by support (640), rotating briquetting (639) one end to be hinged on rotation bracer (637), the other end is connected with compression cylinder (638)；Auxiliary positioning module (63) is through connecting substrate (64) and being arranged in connection substrate (64) by support (640)；Auxiliary positioning cylinder (632) and compression cylinder (638) connect PLC control system (5).

9. automobile shift fork laser soldering device according to claim 1, it is characterized in that: described welder adopts two laser instrument (1) and two laser welding systems (3), and mechanical hand (4) drives two laser welding systems (3) to weld simultaneously.