A semiconductor laser welding automatic positioning device and positioning method thereof

Abstract

The present invention discloses a semiconductor laser welding automatic positioning device and a positioning method thereof, and relates to the technical field of laser welding positioning devices. A semiconductor laser welding automatic positioning device comprises a mounting frame, and also comprises: two first turntables and two second turntables connected to the mounting frame by rotating a shaft; the present invention can not only realize batch and stable pipe welding, but also because the slots on the first turntable and the second turntable are coaxial, so that the pipe is placed in the slot and automatically realizes coaxial positioning, and can also make two pipes to be welded automatically close to each other and position, and when the pipe reaches the bottom of the laser welding end, the clamping plate realizes continuous clamping of the pipe, and the clamping plate is driven by the first motor to rotate and then the pipe rotates, so as to realize axial stable welding of the pipe, so the present device effectively improves the automation degree of laser welding, reduces the time loss caused by manual operation steps, and effectively improves welding efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of laser welding positioning devices, and in particular relates to an automatic semiconductor laser welding positioning device. Background Art

[0002] Semiconductor laser welding is a welding method that uses a focused laser beam as energy to bombard the weldment to generate heat;

[0003] In the operation of welding two pipe fittings, the coaxial accuracy requirements of the pipe fittings are very strict. If there is a misalignment between the two pipe fittings, the coaxiality of the pipe fittings will deviate. At this time, during laser welding, defects will appear at the weld, and the pipe fittings after welding will not be coaxial, and the quality of the pipe fittings cannot meet the requirements;

[0004] In the prior art, corresponding clamps are usually made to clamp the two pipes respectively so that the two pipes remain coaxial. However, when clamping the pipes, such clamps need to be placed on the clamps one by one manually, and then the two pipes are adjusted so that the two pipe ends are close together, and the two pipes are driven to rotate during the welding process to complete the circumferential welding. Therefore, when the prior art performs laser welding on pipes, there are many positioning operation steps, which leads to an increase in the time consumed for a single welding, and thus reduces the welding efficiency. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a semiconductor laser welding automatic positioning device that can overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a semiconductor laser welding automatic positioning device, including a mounting frame, and also including: two first turntables and two second turntables connected to the mounting frame by rotating shafts, and a spacing is left between the two first turntables and the two second turntables; a clamping groove, which is circumferentially opened on the first turntable and the second turntable, and the clamping groove is an open circle, and the center of the clamping groove is biased to the outer circle of the first turntable and the second turntable; a bending plate, which is respectively located on the outside of the first turntable and the second turntable, and the pipe fittings are respectively placed in the clamping grooves of the first turntable and the second turntable, and the pipe fittings on the first turntable and the second turntable will be close to each other when passing through the bending plate; a laser welding end located above the first turntable and the second turntable; a rotating mechanism, which is used to drive the pipe fittings on the first turntable and the second turntable to rotate when the pipe fittings on the first turntable and the second turntable reach the laser welding end, and perform axial welding on the pipe fittings.

[0007] Preferably, clamping plates are provided on both sides of the first turntable and the second turntable, and the clamping plates are elastically connected to the mounting frame to clamp the pipes on the first turntable and the second turntable when the pipes on the first turntable and the second turntable reach below the laser welding end.

[0008] Preferably, the rotating mechanism includes a connecting shaft located on both sides of the first turntable and the second turntable, the connecting shaft is rotatably connected to the mounting frame, a polygonal rod is fixedly connected to the clamping plate, the polygonal rod is slidably connected in the connecting shaft, a first motor is installed on the mounting frame, synchronous wheels are installed on the rotating shaft of the first motor and the connecting shaft, the connecting shaft and the first motor are connected by a synchronous belt, a spring is sleeved on the polygonal rod, and both ends of the spring are fixedly connected to the clamping plate and the synchronous wheel respectively.

[0009] Furthermore, an arc chamfer is provided on the outer circumference of the clamping plate away from the polygonal rod.

[0010] Furthermore, a stripping plate is fixedly connected to the mounting frame via a connecting frame, so as to automatically detach from the first rotating disk and the second rotating disk after the welding of the pipe fitting is completed.

[0011] Furthermore, the extension plate on the discharge plate extends into the interval between the first turntable and the second turntable.

[0012] Furthermore, a first eccentric wheel is fixedly connected to the connecting shaft, a first piston cylinder is fixedly connected to the mounting frame, a first piston rod is slidably connected in the first piston cylinder, one end of the first piston rod is slidably connected to the first eccentric wheel, an oil suction pipe and an oil injection pipe are respectively fixedly connected to the first piston cylinder, a one-way valve is provided on the oil suction pipe and the oil injection pipe, an oil injection nozzle is installed on the oil injection pipe, and the oil injection nozzles are respectively facing the first turntable and the second turntable.

[0013] Furthermore, a friction pad is provided on the upper surface of the discharge plate.

[0014] Furthermore, a second eccentric wheel is fixedly connected to the connecting shaft, a second piston cylinder is fixedly connected to the mounting frame, a second piston rod is slidably connected in the second piston cylinder, one end of the second piston rod is slidably connected to the second eccentric wheel, and an air inlet pipe and an air outlet pipe are respectively fixedly connected to the second piston cylinder, a one-way valve is provided on the air inlet pipe and the air outlet pipe, a nozzle is installed on the air outlet pipe, and the nozzle faces the laser welding end from bottom to top.

[0015] An automatic positioning method for semiconductor laser welding mainly includes the following steps:

[0016] S1, insert two pipes into the slots on the first turntable and the second turntable at the same time, and drive the pipes to rotate clockwise through the first turntable and the second turntable;

[0017] S2. When the pipe passes through the bending plate, the bending plate will make one end of the pipe on the first turntable and the second turntable automatically approach each other and close to each other to achieve automatic positioning;

[0018] S3, when the pipe fitting reaches below the laser welding end, the clamping plate continuously clamps the pipe fitting, and the first motor drives the clamping plate to rotate so as to rotate the pipe fitting, thereby achieving axially stable welding of the pipe fitting;

[0019] S4. After welding is completed, the pipes are unloaded automatically after welding when passing through the unloading plate.

[0020] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0021] 1. The semiconductor laser welding automatic positioning device can well support the pipe in the length direction by setting two first turntables and two second turntables, can effectively avoid the skew of the pipe, and can realize continuous feeding, and then realize continuous welding. The setting of the bending plate can realize the effect of automatic close positioning of the two ends of the pipe when the pipe moves below the laser welding end, and after the pipe reaches the bottom of the laser welding end, the clamping plate realizes continuous clamping of the pipe, and the first motor drives the clamping plate to rotate and then the pipe to rotate, so as to realize axial stable welding of the pipe. Therefore, the device effectively improves the automation degree of laser welding, reduces the time loss caused by manual operation steps, and effectively improves welding efficiency.

[0022] 2. The semiconductor laser welding automatic positioning device can not only realize batch and stable pipe welding, but also because the slots on the first turntable and the second turntable are coaxial, the pipe can be automatically coaxially positioned after being placed in the slot, and the two pipes to be welded can be automatically positioned close together, and when the pipe reaches the bottom of the laser welding end, the clamping plate continuously clamps the pipe, and the first motor drives the clamping plate to rotate and then the pipe to rotate, so as to realize axial stable welding of the pipe. Therefore, the device effectively improves the automation degree of laser welding, reduces the time loss caused by manual operation steps, and effectively improves welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the attached picture:

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a semiconductor laser welding automatic positioning device proposed by the present invention Figure 1 ;

[0025] Figure 2A semiconductor laser welding automatic positioning device proposed by the present invention Figure 1 The structural diagram at A in the middle;

[0026] Figure 3 A schematic diagram of the three-dimensional structure of a semiconductor laser welding automatic positioning device proposed by the present invention Figure 2 ;

[0027] Figure 4 A semiconductor laser welding automatic positioning device proposed by the present invention Figure 3 Schematic diagram of the structure at B in the middle;

[0028] Figure 5 A schematic diagram of the structure of a first rotating disk and a second rotating disk of a semiconductor laser welding automatic positioning device proposed by the present invention;

[0029] Figure 6 A top view of a semiconductor laser welding automatic positioning device proposed by the present invention;

[0030] Figure 7 The present invention provides a schematic structural diagram of a stripping plate and an extension plate of an automatic positioning device for semiconductor laser welding.

[0031] In the figure: 1. mounting frame; 10. pipe fitting; 11. first turntable; 12. second turntable; 121. second motor; 13. slot; 131. connecting rod; 132. bending plate; 14. clamping plate; 141. polygonal rod; 142. spring; 143. connecting shaft; 144. synchronous belt; 145. first motor; 15. first eccentric wheel; 151. first piston cylinder; 152. first piston rod; 153. oil suction pipe; 154. oil injection pipe; 155. oil injection nozzle; 16. second eccentric wheel; 161. second piston cylinder; 162. second piston rod; 163. air inlet pipe; 164. air outlet pipe; 165. nozzle; 2. unloading plate; 21. extension plate; 22. friction pad; 23. connecting frame; 3. laser welding end. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0033] Example 1: Reference Figure 1-Figure 7A semiconductor laser welding automatic positioning device includes a mounting frame 1, and also includes: two first turntables 11 and two second turntables 12 connected to the mounting frame 1 by a rotating shaft, and driven to rotate by a second motor 121 installed on the mounting frame 1, and a gap is left between the two first turntables 11 and the two second turntables 12; a slot 13, which is circumferentially opened on the first turntable 11 and the second turntable 12, and the slots 13 on the first turntable 11 and the second turntable 12 are coaxial, so that the pipe 10 is automatically coaxially positioned after being placed in the slot 13, and the slot 13 is open and circular, and the center of the slot 13 is biased toward the first turntable 11 and the second turntable 1 2; a bending plate 132, which is respectively located on the outside of the first turntable 11 and the second turntable 12, and the bending plate 132 is connected to the mounting frame 1 through a connecting rod 131, and the pipe fittings 10 are respectively placed in the clamping grooves 13 of the first turntable 11 and the second turntable 12, and the pipe fittings 10 located on the first turntable 11 and the second turntable 12 will be close to each other when passing through the bending plate 132; a laser welding end 3 located above the first turntable 11 and the second turntable 12; a rotating mechanism, which is used to drive the pipe fittings 10 on the first turntable 11 and the second turntable 12 to rotate when the pipe fittings 10 on the first turntable 11 and the second turntable 12 reach the laser welding end 3, and perform axial welding on the pipe fittings 10;

[0034] A clamping plate 14 is provided on both sides of the first rotating disk 11 and the second rotating disk 12. The clamping plate 14 is elastically connected to the mounting frame 1 to clamp the pipe fittings 10 on the first rotating disk 11 and the second rotating disk 12 when the pipe fittings 10 on the first rotating disk 11 and the second rotating disk 12 reach below the laser welding end 3.

[0035] The rotating mechanism includes a connecting shaft 143 located on both sides of the first rotating disk 11 and the second rotating disk 12, the connecting shaft 143 is rotatably connected to the mounting frame 1, a multi-faceted rod 141 is fixedly connected to the clamping plate 14, the multi-faceted rod 141 is slidably connected to the connecting shaft 143, a first motor 145 is installed on the mounting frame 1, a synchronous wheel is installed on the rotating shaft of the first motor 145 and the connecting shaft 143, the connecting shaft 143 and the first motor 145 are connected by a synchronous belt 144, a spring 142 is sleeved on the multi-faceted rod 141, and both ends of the spring 142 are fixedly connected to the clamping plate 14 and the synchronous wheel respectively;

[0036] An arc chamfer is formed on the outer periphery of the clamping plate 14 away from the polygonal rod 141;

[0037] In the present device, two first turntables 11 and two second turntables 12 are respectively provided, and there is a certain distance between them, wherein the distance between the first turntable 11 and the second turntable 12 is the largest. The two first turntables 11 and the two second turntables 12 can well support the pipe 10 in the length direction, and can effectively prevent the pipe 10 from being skewed;

[0038] When in use, the two pipe fittings 10 are respectively inserted into the clamping grooves 13 on the first rotating disk 11 and the second rotating disk 12 at the same time. Since the center of the clamping groove 13 deviates inwardly from the outer circle of the first rotating disk 11 and the second rotating disk 12, the clamping groove 13 can also clamp the pipe fittings 10, and can prevent the pipe fittings 10 from falling off the first rotating disk 11 and the second rotating disk 12 when the first rotating disk 11 and the second rotating disk 12 rotate clockwise.

[0039] After the pipe 10 is inserted into the slot 13, the first turntable 11 and the second turntable 12 rotate, and the first turntable 11 and the second turntable 12 bring the pipe 10 to the bottom of the laser welding end 3. When the pipe 10 moves to the bottom of the laser welding end 3, one end of the pipe 10 on the first turntable 11 and the second turntable 12 will contact the bending plate 132, and the distance between the two ends of the bending plate 132 and the corresponding outer side surfaces of the first turntable 11 and the second turntable 12 is greatly reduced. Therefore, when one end of the pipe 10 contacts the bending plate 132, the bending plate 132 will make one end of the pipe 10 on the first turntable 11 and the second turntable 12 automatically approach and press against each other, so that one end of the pipe 10 to be welded is automatically positioned tightly, and no manual positioning is required, which saves operation steps and effectively improves welding efficiency.

[0040] The clamping plate 14 is located on one side of one end of the bending plate 132. Therefore, when the pipe 10 passes through the bending plate 132 to make the two ends close together, when the pipe 10 is separated from the bending plate 132, it will be clamped by the clamping plate 14 located on one side of the first rotating disk 11 and the second rotating disk 12, so that the pipe 10 is continuously close together before welding.

[0041] When the pipe 10 reaches the bottom of the laser welding end 3, the first rotating disk 11 and the second rotating disk 12 stop rotating. At this time, the laser welding end 3 welds the two pipes 10. At the same time, the first motor 145 rotates to drive the connecting shaft 143 to rotate, and then drives the clamping plate 14 to rotate, so that the pipe 10 rotates to achieve axial welding of the pipe 10. Therefore, the setting of the rotating mechanism also reduces the steps of manual operation, so that the device improves the degree of automation, reduces the time loss caused by the manual operation steps, and effectively improves the welding efficiency.

[0042] Therefore, the device can well support the pipe 10 in the length direction by setting two first turntables 11 and two second turntables 12, can effectively prevent the pipe 10 from tilting, and can realize continuous feeding and thus continuous welding. The setting of the bending plate 132 can realize the effect of automatic positioning of the two ends of the pipe 10 when it moves under the laser welding end 3. After the pipe 10 reaches under the laser welding end 3, the clamping plate 14 realizes continuous clamping of the pipe 10, and the first motor 145 drives the clamping plate 14 to rotate and then the pipe 10 rotates, thereby realizing axial stable welding of the pipe 10. Therefore, the device effectively improves the degree of automation of laser welding, reduces the time loss caused by manual operation steps, and thus effectively improves welding efficiency.

[0043] Example 2: Reference Figure 5 , a semiconductor laser welding automatic positioning device, which is basically the same as the embodiment 1, and furthermore: a stripper plate 2 is fixedly connected to the mounting frame 1 through a connecting frame 23, so as to automatically detach from the first rotating disk 11 and the second rotating disk 12 after the pipe 10 is welded;

[0044] The extension plate 21 on the unloading plate 2 extends into the interval between the first rotating disk 11 and the second rotating disk 12;

[0045] When the pipe fittings 10 on the first rotating disk 11 and the second rotating disk 12 are welded, the first rotating disk 11 and the second rotating disk 12 drive the pipe fittings 10 to continue to rotate clockwise. Since the extension plate 21 extends into the outer circle of the first rotating disk 11 and the second rotating disk 12, when the pipe fittings 10 welded on the first rotating disk 11 and the second rotating disk 12 contact with the extension plate 21, the pipe fittings 10 will be separated from the clamping groove 13 under the rotation of the first rotating disk 11 and the second rotating disk 12, so that the pipe fittings 10 fall on the unloading plate 2, and the self-unloading after welding is completed;

[0046] Therefore, the device can not only realize batch and stable welding of the pipe fittings 10, but also because the slots 13 on the first turntable 11 and the second turntable 12 are coaxial, the pipe fittings 10 can be automatically coaxially positioned after being placed in the slots 13, and the two pipe fittings 10 to be welded can be automatically positioned close together, and when the pipe fittings 10 reach below the laser welding end 3, the clamping plate 14 can continuously clamp the pipe fittings 10, and the first motor 145 drives the clamping plate 14 to rotate and then the pipe fittings 10 to rotate, so as to realize axial stable welding of the pipe fittings 10. Therefore, the device effectively improves the degree of automation of laser welding, reduces the time loss caused by manual operation steps, and effectively improves welding efficiency.

[0047] Example 3: Reference Figure 1-Figure 7, a semiconductor laser welding automatic positioning device, which is basically the same as Example 2, and further: a first eccentric wheel 15 is fixedly connected to the connecting shaft 143, a first piston cylinder 151 is fixedly connected to the mounting frame 1, a first piston rod 152 is slidably connected in the first piston cylinder 151, one end of the first piston rod 152 is slidably connected to the first eccentric wheel 15, an oil suction pipe 153 and an oil injection pipe 154 are fixedly connected to the first piston cylinder 151, a one-way valve is provided on the oil suction pipe 153 and the oil injection pipe 154, an oil injection nozzle 155 is installed on the oil injection pipe 154, and the oil injection nozzle 155 faces the first rotating disk 11 and the second rotating disk 12 respectively;

[0048] When the pipe 10 reaches below the laser welding end 3, the first motor 145 drives the connecting shaft 143 to rotate, and the first eccentric wheel 15 pushes the first piston rod 152 to slide in the first piston cylinder 151, and squeezes the oil in the first piston cylinder 151, and sprays the oil from the oil spray nozzle 155 to the pipes 10 on the first rotating disk 11 and the second rotating disk 12, thereby lubricating the rotating pipe 10;

[0049] It should be understood that a baffle is provided on the side of the laser welding end 3 close to the oil spray nozzle 155 to prevent sparks from splashing onto the oil on the pipe 10 during laser welding, further improving safety;

[0050] An oil storage barrel is provided outside, and the oil suction pipe 153 extends into the oil storage barrel to suck oil into the first piston cylinder 151 .

[0051] The upper surface of the discharge plate 2 is provided with a friction pad 22;

[0052] When the pipe fitting 10 is welded and slides onto the unloading plate 2, the oil on the surface of the pipe fitting 10 will be smeared onto the friction pad 22 when the pipe fitting 10 slides on the unloading plate 2, so that the friction pad 22 is adhered with oil, which makes the surface of the pipe fitting 10 that slides onto the unloading plate 2 subsequently be smeared with oil, and then the surface of the pipe fitting 10 is automatically smeared with oil, thereby improving the corrosion resistance of the pipe fitting 10.

[0053] Example 4: Reference Figure 1-Figure 7 , a semiconductor laser welding automatic positioning device, which is basically the same as Example 3, and further: a second eccentric wheel 16 is fixedly connected to the connecting shaft 143, a second piston cylinder 161 is fixedly connected to the mounting frame 1, a second piston rod 162 is slidably connected in the second piston cylinder 161, one end of the second piston rod 162 is slidably connected to the second eccentric wheel 16, and an air inlet pipe 163 and an air outlet pipe 164 are fixedly connected to the second piston cylinder 161, and a one-way valve is provided on the air inlet pipe 163 and the air outlet pipe 164, and a nozzle 165 is installed on the air outlet pipe 164, and the nozzle 165 faces the laser welding end 3 from bottom to top;

[0054] When the pipe fitting 10 reaches below the laser welding end 3, when the first motor 145 drives the connecting shaft 143 to rotate, the second eccentric wheel 16 will push the second piston rod 162 to slide in the second piston cylinder 161, and squeeze the gas in the second piston cylinder 161, and spray it from the nozzle 165 to the welding point of the two pipe fittings 10, thereby cooling the welding point of the pipe fitting 10.

[0055] Example 5: Reference Figure 1-Figure 7 , an automatic positioning method for semiconductor laser welding, mainly comprising the following steps:

[0056] S1. Insert two pipe fittings 10 into the slots 13 on the first rotating disk 11 and the second rotating disk 12 at the same time, and drive the pipe fittings 10 to rotate clockwise through the first rotating disk 11 and the second rotating disk 12;

[0057] S2. When the pipe 10 passes through the bending plate 132, the bending plate 132 will make one end of the pipe 10 on the first rotating disk 11 and the second rotating disk 12 automatically approach each other and close to each other to achieve automatic positioning;

[0058] S3, when the pipe 10 reaches below the laser welding end 3, the clamping plate 14 continuously clamps the pipe 10, and the first motor 145 drives the clamping plate 14 to rotate and then the pipe 10 to rotate, so as to achieve axial stable welding of the pipe 10;

[0059] S4. After welding is completed, the pipe 10 completes autonomous unloading after welding when passing through the unloading plate 2.

[0060] The present invention can not only realize batch and stable welding of pipe fittings 10, but also because the slots 13 on the first turntable 11 and the second turntable 12 are coaxial, the pipe fittings 10 can be automatically coaxially positioned after being placed in the slots 13, and the two pipe fittings 10 to be welded can be automatically positioned close together, and when the pipe fittings 10 reach below the laser welding end 3, the clamping plate 14 can continuously clamp the pipe fittings 10, and the first motor 145 drives the clamping plate 14 to rotate and then the pipe fittings 10 to rotate, so as to realize axial stable welding of the pipe fittings 10. Therefore, the present device effectively improves the automation degree of laser welding, reduces the time loss caused by manual operation steps, and effectively improves welding efficiency.

[0061] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the present invention can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A semiconductor laser welding automatic positioning device, comprising a mounting frame (1), characterized in that: Also includes: Two first rotating disks (11) and two second rotating disks (12) are rotatably connected to the mounting frame (1) via a rotating shaft, and a distance is left between the two first rotating disks (11) and the two second rotating disks (12); The card slots (13) are respectively circumferentially opened on the first rotating disk (11) and the second rotating disk (12); the card slots (13) are in the shape of an open circle, and the center of the card slots (13) is biased toward the inner side of the outer circle of the first rotating disk (11) and the second rotating disk (12); The bent plates (132) are respectively located outside the first rotating disk (11) and the second rotating disk (12). The pipe fittings (10) are respectively placed in the slots (13) of the first rotating disk (11) and the second rotating disk (12), so that the pipe fittings (10) on the first rotating disk (11) and the second rotating disk (12) are pressed against each other when passing through the bending plate (132); A laser welding end (3) located above the first rotating disk (11) and the second rotating disk (12); A rotating mechanism, used for driving the pipe fittings (10) on the first rotating disk (11) and the second rotating disk (12) to rotate when the pipe fittings (10) on the first rotating disk (11) and the second rotating disk (12) reach the laser welding end (3), so as to perform axial welding on the pipe fittings (10); Clamping plates (14) are provided on both sides of the first rotating disk (11) and the second rotating disk (12), and the clamping plates (14) are elastically connected to the mounting frame (1) so as to clamp the pipe fittings (10) on the first rotating disk (11) and the second rotating disk (12) when the pipe fittings (10) on the first rotating disk (11) and the second rotating disk (12) reach below the laser welding end (3); The rotating mechanism comprises a connecting shaft (143) located on both sides of the first rotating disk (11) and the second rotating disk (12), the connecting shaft (143) being rotatably connected to the mounting frame (1), a polygonal rod (141) being fixedly connected to the clamping plate (14), the polygonal rod (141) being slidably connected to the connecting shaft (143), a first motor (145) being installed on the mounting frame (1), a synchronous wheel being installed on the rotating shaft of the first motor (145) and the connecting shaft (143), the connecting shaft (143) and the first motor (145) being connected via a synchronous belt (144), a spring (142) being sleeved on the polygonal rod (141), the two ends of the spring (142) being fixedly connected to the clamping plate (14) and the synchronous wheel respectively; The connecting shaft (143) is fixedly connected to a first eccentric wheel (15), the mounting frame (1) is fixedly connected to a first piston cylinder (151), a first piston rod (152) is slidably connected inside the first piston cylinder (151), one end of the first piston rod (152) is slidably connected to the first eccentric wheel (15), an oil suction pipe (153) and an oil injection pipe (154) are respectively fixedly connected to the first piston cylinder (151), both the oil suction pipe (153) and the oil injection pipe (154) are provided with a one-way valve, and an oil injection nozzle (155) is installed on the oil injection pipe (154), and the oil injection nozzle (155) faces the first rotating disk (11) and the second rotating disk (12), respectively.

2. The semiconductor laser welding automatic positioning device according to claim 1, characterized in that: An arc-shaped chamfer is provided on the outer periphery of the clamping plate (14) away from the polygonal rod (141).

3. The semiconductor laser welding automatic positioning device according to claim 1, characterized in that: The mounting frame (1) is fixedly connected to a stripping plate (2) via a connecting frame (23) for automatically detaching from the first rotating disk (11) and the second rotating disk (12) after the pipe (10) is welded.

4. The semiconductor laser welding automatic positioning device according to claim 3, characterized in that: The extension plate (21) on the discharge plate (2) extends into the space between the first rotating disk (11) and the second rotating disk (12).

5. The semiconductor laser welding automatic positioning device according to claim 4, characterized in that: A friction pad (22) is provided on the upper surface of the discharge plate (2).

6. The semiconductor laser welding automatic positioning device according to claim 5, characterized in that: The connecting shaft (143) is fixedly connected to a second eccentric wheel (16), the mounting frame (1) is fixedly connected to a second piston cylinder (161), a second piston rod (162) is slidably connected inside the second piston cylinder (161), one end of the second piston rod (162) is slidably connected to the second eccentric wheel (16), an air inlet pipe (163) and an air outlet pipe (164) are respectively fixedly connected to the second piston cylinder (161), both the air inlet pipe (163) and the air outlet pipe (164) are provided with a one-way valve, and a nozzle (165) is installed on the air outlet pipe (164), and the nozzle (165) faces the laser welding end (3) from bottom to top.

7. An automatic positioning method for semiconductor laser welding, comprising the automatic positioning device for semiconductor laser welding according to claim 6, characterized in that: The main steps include: S1, simultaneously inserting the two pipe fittings (10) into the clamping grooves (13) on the first rotating disk (11) and the second rotating disk (12), respectively, and driving the pipe fittings (10) to rotate clockwise via the first rotating disk (11) and the second rotating disk (12); S2. When the pipe (10) passes through the bending plate (132), the bending plate (132) causes one end of the pipe (10) on the first rotating disk (11) and the second rotating disk (12) to automatically approach each other and press against each other to achieve automatic positioning; S3, when the pipe (10) reaches below the laser welding end (3), the clamping plate (14) continuously clamps the pipe (10), and the first motor (145) drives the clamping plate (14) to rotate, thereby rotating the pipe (10), thereby achieving axially stable welding of the pipe (10); S4. After welding is completed, the pipe (10) is automatically unloaded after welding when passing through the unloading plate (2).

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