Laser welding equipment and welding method for motor iron core

Abstract

The invention relates to the technical field of motor production, in particular to laser welding equipment for a motor iron core and a welding method.The laser welding equipment comprises a transmission component, a conveying device is fixedly installed at the front end of the top of the transmission component, and an alignment component is fixedly installed at the rear end of the conveying device; the conveying device comprises a storage cavity, first springs, an L-shaped blocking plate and extension frames, the extension frames are symmetrically and fixedly installed at the front end of the storage cavity, the L-shaped blocking plate is slidably connected to the extension frames in a sleeving mode, the first springs are symmetrically and fixedly installed between the L-shaped blocking plate and the storage cavity, and the alignment component comprises a contact device and a positioning device. The contact device is fixedly installed at the bottom end of the positioning device, the positioning device comprises a front end support, a positioning top plate, a hydraulic cylinder, a contact disc, a positioning cylinder and a sleeve, and the positioning top plate is fixedly installed at the top end of the front end support. Through the arrangement of the conveying device, the alignment part and the transmission part, the purposes of welding and guiding type conveying during alignment of the motor iron core welding equipment are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor production, and specifically relates to a laser welding device and welding method for a motor iron core. Background Art

[0002] Motor iron core sheets (also known as silicon steel sheets and electrical steel sheets) are the core magnetic conduction components of motors (such as electric motors and generators), and their performance directly affects the efficiency, power density, and temperature rise of the motors.

[0003] Laser welding has become the core process for welding motor iron cores (especially for electric vehicle drive motors and high-efficiency industrial motors) due to its advantages such as high precision, low heat input, and automation compatibility.

[0004] Currently, when using a motor iron core welding device, since the motor iron core sheets need to be clamped and then the motor iron core is rotated multiple times before welding, but when welding the motor iron core in this way, a variety of devices are required for cumbersome connection and assembly pairing. At the same time, a pressurizing component needs to be added for assistance during welding. Therefore, when the existing motor iron core welding device is in use, it cannot perform rapid and precise alignment welding, and at the same time, it cannot perform the function of matching and guiding transportation. Therefore, an equipment is needed to improve the above problems. Summary of the Invention

[0005] Aiming at the problems in the prior art, the present invention provides a laser welding device and welding method for a motor iron core.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a laser welding device for a motor iron core, including a transmission component. A conveying device is fixedly installed at the front end of the top of the transmission component. A positioning component is fixedly installed at the rear end of the conveying device. The conveying device includes a storage cavity, a first spring, an L-shaped blocking plate, and an extension frame. The extension frames are symmetrically and fixedly installed at the front end of the storage cavity. The L-shaped blocking plate is slidably sleeved on the extension frames. The first springs are symmetrically and fixedly installed between the L-shaped blocking plate and the storage cavity. The positioning component includes a contact device and a positioning device. The contact device is fixedly installed at the bottom end of the positioning device. The positioning device includes a front-end support, a positioning top plate, a hydraulic cylinder, a contact disk, a positioning cylinder, and a sleeve. The positioning top plate is fixedly installed at the top end of the front-end support. The hydraulic cylinder is fixedly installed on the positioning top plate. The contact disk is fixedly installed at the bottom end of the hydraulic cylinder. The sleeve and the positioning cylinder are both fixedly installed on the outer ring of the front-end support.

[0007] Specifically, the contact device includes a leading frame, a support ring, a laser welding gun, a first rack, an extended side frame, a displacement rod, and a second spring. The displacement rod and the second spring are both fixedly installed at the top of the support ring, and the displacement rod and the second spring are arranged alternately. The extended side frames are symmetrically and fixedly installed at the front end of the support ring. The first rack is fixedly installed at the bottom end of the extended side frame. The laser welding gun is fixedly installed at the bottom end of the support ring, and the laser welding guns are distributed in a ring shape. The leading frames are symmetrically and fixedly installed at the top of the rear end of the support ring. Specifically, the transmission component includes a displacement device and a power device. The displacement device is slidably sleeved on the top of the power device. Specifically, the displacement device includes a support cavity, a movable frame, a sleeve plate, a third spring, a second rack, a third rack, a displacement base, a synchronous rod, a first gear, a fourth spring, a positioning substrate, and a positioning cylinder. The positioning cylinder is fixedly installed at the center of the top end of the displacement base. The support cavity is fixedly installed at the rear sides of both sides of the displacement base. The third spring is fixedly installed at the rear end inside the support cavity. The movable frame is fixedly installed behind the third spring. The sleeve plate is fixedly installed behind the movable frame. The second rack is fixedly installed at the bottom end of the sleeve plate. The positioning substrate is slidably inserted into the front end inside the positioning cylinder. The synchronous rod is fixedly installed in front of the bottom of the positioning substrate. The fourth spring is symmetrically fixedly installed between the synchronous rod and the displacement base. The third rack is fixedly installed at both ends of the synchronous rod. The first gear is rotatably installed at the front sides of both sides of the displacement base. Specifically, the power device includes a first fence, a connecting rope, a photoelectric sensor, a shaft rod, a second gear, a guiding side rod, a lead screw, a driving motor, a transmission sprocket, a transmission chain, a second fence, and a support base plate. The second fence is fixedly installed at the front end of the top of the support base plate. The first fence is fixedly installed at the rear end of the top of the support base plate. The second gear is rotatably installed on both sides of the support base plate close to the first fence. The shaft rod is fixedly installed between the two second gears. The connecting ropes are symmetrically fixedly installed on the outer circle of the shaft rod. The photoelectric sensors are symmetrically fixedly installed on the top of the support base plate close to the first fence. The guiding side rods are symmetrically fixedly installed on the top of the support base plate. The transmission sprockets are symmetrically rotatably installed at the front end of the support base plate. The transmission chain is meshed and sleeved on the outer circle of the transmission sprocket. The driving motor is fixedly installed at the front end of the support base plate. The lead screw is fixedly installed at the center of the rear end of the transmission sprocket.

[0008] Specifically, the accumulation cavity is fixedly installed at the front end of the top of the support base plate. The displacement rod is slidably inserted into the inner bottom end of the positioning cylinder. The top end of the second spring is connected to the inner top end of the sleeve. The front bracket is fixedly installed at the rear end of the accumulation cavity. The bottom end of the front guide frame is connected to the top end of the connecting rope. The displacement base is slidably sleeved on the guiding side rod. The sleeve plate is threadedly sleeved on the lead screw. The first gear meshes with the third rack.

[0009] Specifically, the inner top end of the L-shaped blocking plate is flush with the bottom end of the accumulation cavity. Vertical grooves are formed around the positioning cylinder. A horizontal groove is formed at the center of the inner part of the positioning substrate. Through holes are formed in the inner side end of the sleeve plate close to the positioning cylinder.

[0010] Specifically, a discharge hole is formed at the center of the bottom end of the displacement base. The photoelectric sensor is electrically connected to the hydraulic cylinder. A square groove is formed at the rear end of the inner part of the support base plate. The top end of the positioning cylinder is flush with the bottom end of the accumulation cavity.

[0011] Specifically, the support base plate further includes a guide plate, a buffer spring, and a support shell. The support shell is fixedly installed at the rear of the bottom of the support base plate. The buffer springs are symmetrically and fixedly installed at the inner bottom end of the support shell. The guide plate is fixedly installed at the top end of the buffer spring.

[0012] A welding method for a laser welding device for motor iron cores includes the following steps: S1. First, stack the motor iron core sheets inside the accumulation cavity so that the motor iron core sheets can be placed inside the positioning cylinder. Subsequently, start the driving motor to drive the lead screw to rotate, so that the displacement base can move backward. At this time, the positioning cylinder can drive the motor iron core sheets to move, and the L-shaped blocking plate closes the bottom end of the accumulation cavity. S2. After that, when the displacement base moves to contact the first baffle, the positioning cylinder can be vertically aligned with the contact disc. At this time, the sleeve plate can continue to move backward, so that the second rack can drive the second gear to rotate, causing the connecting rope to pull the support ring downward. At this time, the support ring can contact the photoelectric sensor to start the hydraulic cylinder, so that the contact disc can press the motor iron core sheet inside the positioning cylinder. At the same time, when the laser welding gun senses the motor iron core sheet, it can perform the welding work from top to bottom. S3. Finally, when the support ring is about to move downward to the limit position, the first rack can mesh with the first gear. At this time, the first rack drives the third rack to move forward through the first gear, so that the positioning substrate can be pulled out from the inside of the positioning cylinder until the laser welding gun completely passes through all the motor iron core sheets. When the first rack moves subsequently, it can drive the third rack to move forward to the limit position, so that the welded motor iron core sheets can fall out from the inside of the displacement base to complete the welding work of the motor iron core sheets.

[0013] Advantages of the present invention: First, when the support ring moves downward, it can drive the laser welding gun to align with the gap inside the alignment cylinder, enabling the laser welding gun to weld the motor iron core chips from multiple directions. At the same time, when the laser welding gun moves downward, it can pass through the motor iron core chips, allowing all the motor iron core chips to be welded together. Moreover, the first rack can drive the first gear to rotate, so that the third rack can move forward, discharging the welded motor iron core chips. And the positioning substrate can be driven to reset by the fourth spring when the first gear loses the meshing force, enabling the positioning substrate to enter the inside of the alignment cylinder again to pick up the motor iron core chips, completing the work of butt welding of the motor iron core chips.

[0014] Second, when the driving motor is started, it can drive the lead screw to rotate, causing the displacement base to move backward. At the same time, when the displacement base moves to contact the first baffle, the sleeve plate can continue to move, so that the second rack can drive the second gear to rotate, and the connecting rope can pull the support ring downward. And through the setting of the L-shaped blocking plate, it can close the bottom end of the accumulation cavity when the alignment cylinder leaves the bottom end of the accumulation cavity, preventing the motor iron core chips inside the accumulation cavity from falling. Subsequently, when the displacement base resets, it can drive the alignment cylinder to squeeze the L-shaped blocking plate to be misaligned with the bottom end of the accumulation cavity, so that the inside of the alignment cylinder can be refilled with motor iron core chips, completing the work of guided transmission. Description of the Drawings

[0015] The present invention will be further described below with reference to the drawings and embodiments.

[0016] Figure 1 It is a front perspective three-dimensional structure schematic diagram of the main body in the present invention; Figure 2 It is a front perspective three-dimensional structure schematic diagram of the conveying device in the present invention; Figure 3 It is a front perspective three-dimensional structure schematic diagram of the alignment component in the present invention; Figure 4 It is a front perspective three-dimensional structure schematic diagram of the contact device in the present invention; Figure 5 It is a front perspective three-dimensional structure schematic diagram of the positioning device in the present invention; Figure 6 It is a front perspective three-dimensional structure schematic diagram of the transmission component in the present invention; Figure 7 It is a partial sectional view of the displacement device in the present invention; Figure 8 It is a front perspective three-dimensional structure schematic diagram of the power device in the present invention; Figure 9 It is a partial sectional view of the second embodiment of the support base plate in the present invention.

[0017] In the figure: 1. conveying device; 2. alignment component; 3. transmission component; 4. accumulation cavity; 5. first spring; 6. L-shaped blocking plate; 7. extension frame; 8. contact device; 9. positioning device; 10. leading frame; 11. support ring; 12. laser welding gun; 13. first rack; 14. extension side frame; 15. displacement rod; 16. second spring; 17. front-end support; 18. positioning top plate; 19. hydraulic cylinder; 20. contact disc; 21. positioning cylinder; 22. sleeve; 23. displacement device; 24. power device; 25. support cavity; 26. movable frame; 27. sleeve plate; 28. third spring; 29. second rack; 30. third rack; 31. displacement base; 32. synchronizing rod; 33. first gear; 34. fourth spring; 35. positioning base plate; 36. alignment cylinder; 37. first baffle; 38. connecting rope; 39. photoelectric sensor; 40. shaft rod; 41. second gear; 42. guiding side rod; 43. lead screw; 44. driving motor; 45. transmission sprocket; 46. transmission chain; 47. second baffle; 48. support bottom plate; 49. guiding plate; 50. buffer spring; 51. support shell. Detailed implementation mode

[0018] In order to enable those skilled in the art of this technology to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Embodiment 1 As Figure 1 , Figure 2 , Figure 3 and Figure 5As shown in the figure, the present invention is a laser welding device for a motor iron core, including a transmission component 3. A conveying device 1 is fixedly installed at the front end of the top of the transmission component 3. A positioning component 2 is fixedly installed at the rear end of the conveying device 1. The conveying device 1 includes an accumulation cavity 4, a first spring 5, an L-shaped blocking plate 6, and an extension frame 7. The extension frame 7 is symmetrically and fixedly installed at the front end of the accumulation cavity 4. The L-shaped blocking plate 6 is slidably sleeved on the extension frame 7. The first spring 5 is symmetrically and fixedly installed between the L-shaped blocking plate 6 and the accumulation cavity 4. The positioning component 2 includes a contact device 8 and a positioning device 9. The contact device 8 is fixedly installed at the bottom end of the positioning device 9. The positioning device 9 includes a front-end support 17, a positioning top plate 18, a hydraulic cylinder 19, a contact disc 20, a positioning cylinder 21, and a sleeve 22. The positioning top plate 18 is fixedly installed at the top end of the front-end support 17. The hydraulic cylinder 19 is fixedly installed on the positioning top plate 18. The contact disc 20 is fixedly installed at the bottom end of the hydraulic cylinder 19. Both the sleeve 22 and the positioning cylinder 21 are fixedly installed on the outer ring of the front-end support 17.

[0021] As Figure 4 , the contact device 8 includes a front guide frame 10, a support ring 11, a laser welding gun 12, a first rack 13, an extension side frame 14, a displacement rod 15, and a second spring 16. The displacement rod 15 and the second spring 16 are both fixedly installed at the top end of the support ring 11, and the displacement rod 15 and the second spring 16 are arranged alternately. The extension side frame 14 is symmetrically and fixedly installed at the front end of the support ring 11. The first rack 13 is fixedly installed at the bottom end of the extension side frame 14. The laser welding gun 12 is fixedly installed at the bottom end of the support ring 11, and the laser welding guns 12 are annularly distributed. The front guide frame 10 is symmetrically and fixedly installed at the top of the rear end of the support ring 11. When the support ring 11 is displaced upward to the limit position, it can drive the front guide frame 10 to move out of the photoelectric sensor 39, so that the hydraulic cylinder 19 will lose the induction signal. As Figure 6 , the transmission component 3 includes a displacement device 23 and a power device 24. The displacement device 23 is slidably sleeved on the top end of the power device 24, which can support the displacement and sliding of the displacement device 23. By making the outer surface of the motor iron core chip fit with the inner wall of the circular hole inside the accumulation cavity 4, it can avoid the phenomenon of the motor iron core chip being skewed during transmission. As Figure 7, the displacement device 23 includes a support cavity 25, a movable frame 26, a sleeve plate 27, a third spring 28, a second rack 29, a third rack 30, a displacement base 31, a synchronous rod 32, a first gear 33, a fourth spring 34, a positioning substrate 35 and an alignment cylinder 36. The alignment cylinder 36 is fixedly installed at the center of the top end of the displacement base 31. The support cavity 25 is fixedly installed at the rear sides of both sides of the displacement base 31. The third spring 28 is fixedly installed at the inner rear end of the support cavity 25. The movable frame 26 is fixedly installed behind the third spring 28. The sleeve plate 27 is fixedly installed behind the movable frame 26. The second rack 29 is fixedly installed at the bottom end of the sleeve plate 27. The positioning substrate 35 is slidably inserted into the inner front end of the alignment cylinder 36. The synchronous rod 32 is fixedly installed in front of the bottom of the positioning substrate 35. The fourth spring 34 is symmetrically fixedly installed between the synchronous rod 32 and the displacement base 31. The third rack 30 is fixedly installed at both ends of the synchronous rod 32. The first gear 33 is rotatably installed at the front sides of both sides of the displacement base 31. When the positioning substrate 35 is in a normal state, it can be located inside the alignment cylinder 36, so that the motor iron core chips can be received for placement. As Figure 8 , the power device 24 includes a first baffle 37, a connecting rope 38, a photoelectric sensor 39, a shaft rod 40, a second gear 41, a guiding side rod 42, a lead screw 43, a driving motor 44, a transmission sprocket 45, a transmission chain 46, a second baffle 47 and a support base plate 48. The second baffle 47 is fixedly installed at the front end of the top of the support base plate 48. The first baffle 37 is fixedly installed at the rear end of the top of the support base plate 48. The second gear 41 is rotatably installed on both sides of the support base plate 48 close to the first baffle 37. The shaft rod 40 is fixedly installed between the two second gears 41. The connecting rope 38 is symmetrically fixedly installed on the outer ring of the shaft rod 40. The photoelectric sensor 39 is symmetrically fixedly installed on the top of the support base plate 48 close to the first baffle 37. The guiding side rod 42 is symmetrically fixedly installed on the top of the support base plate 48. The transmission sprocket 45 is symmetrically rotatably installed at the front end of the support base plate 48. The transmission chain 46 is meshingly sleeved on the outer ring of the transmission sprocket 45. The driving motor 44 is fixedly installed at the front end of the support base plate 48. The lead screw 43 is fixedly installed at the center of the rear end of the transmission sprocket 45 and is connected to the driving motor 44 through the transmission sprocket 45. When the driving motor 44 is started and runs, it can drive the two transmission sprockets 45 to rotate through the transmission chain 46.

[0022] The accumulation cavity 4 is fixedly installed at the front end of the top of the support base plate 48. The displacement rod 15 is slidably inserted into the inner bottom end of the positioning cylinder 21. The top end of the second spring 16 is connected to the inner top end of the sleeve 22. The front-end support 17 is fixedly installed at the rear end of the accumulation cavity 4. The bottom end of the front guide frame 10 is connected to the top end of the connecting rope 38. The displacement base 31 is slidably sleeved on the guiding side rod 42. The sleeve plate 27 is threadedly sleeved on the lead screw 43. The first gear 33 meshes with the third rack 30. The inner top end of the L-shaped blocking plate 6 is flush with the bottom end of the accumulation cavity 4. Vertical grooves are formed around the alignment cylinder 36. A horizontal groove is formed at the center of the inner part of the positioning substrate 35. Through holes are formed in the inner side end of the sleeve plate 27 close to the alignment cylinder 36. A discharge hole is formed at the center of the bottom end of the displacement base 31. The photoelectric sensor 39 is electrically connected to the hydraulic cylinder 19. A square groove is formed at the rear end of the inner part of the support base plate 48. The top end of the alignment cylinder 36 is flush with the bottom end of the accumulation cavity 4.

[0023] A welding method for a laser welding device for motor iron cores, comprising the following steps: S1. First, stack the motor iron core sheets inside the accumulation cavity 4 so that the motor iron core sheets can be placed inside the alignment cylinder 36. Subsequently, start the drive motor 44 to drive the lead screw 43 to rotate, so that the displacement base 31 can displace backward. At this time, the alignment cylinder 36 can drive the motor iron core sheets to displace, and the L-shaped blocking plate 6 closes the bottom end of the accumulation cavity 4; S2. After that, when the displacement base 31 displaces to contact the first baffle 37, the alignment cylinder 36 can be vertically aligned with the contact disk 20. At this time, the sleeve plate 27 can continue to displace backward, so that the second rack 29 can drive the second gear 41 to rotate, causing the connecting rope 38 to pull the support ring 11 to displace downward. At this time, the support ring 11 can contact the photoelectric sensor 39 to start the hydraulic cylinder 19, so that the contact disk 20 can press the motor iron core sheet inside the alignment cylinder 36. At the same time, when the laser welding gun 12 senses the motor iron core sheet, it can perform the welding work from top to bottom; S3. Finally, when the support ring 11 is about to move downward to the limit position, the first rack 13 can mesh with the first gear 33. At this time, the first rack 13 drives the third rack 30 to displace forward through the first gear 33, so that the positioning substrate 35 can be pulled out from the inside of the alignment cylinder 36 until the laser welding gun 12 completely passes through all the motor iron core sheets. When the first rack 13 displaces subsequently, it can drive the third rack 30 to move forward to the limit position, so that the welded motor iron core sheets can fall out from the inside of the displacement base 31 to complete the welding work of the motor iron core sheets. The working principle of Embodiment 1 is as follows: During use, the motor iron core chips can be stacked inside the accumulation cavity 4. Through the communication between the alignment cylinder 36 and the inside of the accumulation cavity 4, the motor iron core chips can be stacked until they are flush with the top inside the accumulation cavity 4. Then, the driving motor 44 is turned on to drive the transmission sprocket 45 and the transmission chain 46 to rotate. Since the lead screw 43 is connected to the transmission sprocket 45, the lead screw 43 can rotate. The sleeve plate 27 is threadedly sleeved on the lead screw 43, so that the sleeve plate 27 can pull the displacement base 31 to displace backward through the third spring 28. At this time, through the setting of the positioning substrate 35, the motor iron core chips can be supported to be placed inside the alignment cylinder 36. At the same time, the motor iron core chips can be flush with the top of the alignment cylinder 36. Therefore, when the displacement base 31 displaces backward, it can drive the motor iron core chips to displace backward. At the same time, when the displacement base 31 drives the alignment cylinder 36 to displace, the elastic force of the first spring 5 will drive the L-shaped blocking plate 6 to move backward and reset, so that the L-shaped blocking plate 6 can close the bottom of the accumulation cavity 4 to prevent the motor iron core chips on the upper layer inside the accumulation cavity 4 from falling down prematurely; Subsequently, when the displacement base 31 continues to displace backward, it can contact the first baffle 37, so that the displacement base 31 cannot continue to displace. At the same time, the alignment cylinder 36 can be vertically aligned with the contact disk 20. And the sleeve plate 27 can drive the second rack 29 to move to engage with the second gear 41. Therefore, when the sleeve plate 27 continues to displace backward, it can drive the second rack 29 to pass over the top of the second gear 41, so that the shaft rod 40 can be driven to rotate, and the connecting rope 38 can pull the front guide frame 10 and the support ring 11 to move downward. At this time, when the support ring 11 moves downward, the front guide frame 10 can contact the photoelectric sensor 39, so that the photoelectric sensor 39 can start the hydraulic cylinder 19, causing the contact disk 20 to move downward to contact the top of the motor iron core chips inside the alignment cylinder 36, and the motor iron core chips can be pressed downward to prevent the motor iron core chips from warping during welding; Subsequently, when the support ring 11 continues to move downward, it can drive the laser welding gun 12 to move downward along the edge of the motor iron core chip, so that the laser welding gun 12 can sense the motor iron core chip to perform laser welding work. Subsequently, when the laser welding gun 12 continues to move downward, it can drive the first rack 13 to engage with the first gear 33. Since the widths of the first rack 13 and the third rack 30 are 1 cm and the thickness of the first gear 33 is 3 cm, and the first rack 13 and the third rack 30 are misaligned, it can be avoided that the first rack 13 interferes with the third rack 30 when moving downward. Subsequently, when the first rack 13 moves downward to engage with the first gear 33, the first gear 33 can drive the third rack 30 to displace forward, so that the positioning substrate 35 can be slowly withdrawn from the inside of the alignment cylinder 36. When the laser welding gun 12 moves downward past the motor iron core chip on the positioning substrate 35, the first rack 13 can drive the first gear 33 to rotate multiple circles, so that the third rack 30 can drive the positioning substrate 35 to completely move out of the inside of the alignment cylinder 36, so that the welded motor iron core chip can fall from the discharge hole at the bottom end inside the displacement base 31, completing the welding work of the motor iron core chip; Subsequently, the driving motor 44 can be started to drive the transmission sprocket 45 to rotate reversely, so that the lead screw 43 can drive the displacement base 31 to reset forward. At this time, the sleeve plate 27 can move forward, so that the second rack 29 can pass over the top of the second gear 41 again, so that the second gear 41 can drive the shaft rod 40 to rotate reversely. Due to the elasticity of the second spring 16, it will drive the support ring 11 to move upward and reset. At this time, by the sliding of the displacement rod 15 inside the positioning cylinder 21, it can be ensured that the support ring 11 moves up and down in a straight line. Until the second rack 29 completely passes over the top of the second gear 41, the second spring 16 can pull the support ring 11 to move upward and reset, causing the laser welding gun 12 to move to the top of the alignment cylinder 36. At this time, the front guide frame 10 can be misaligned with the photoelectric sensor 39, so that the photoelectric sensor 39 loses the sensing signal, and the hydraulic cylinder 19 can drive the contact disc 20 to reset upward. Subsequently, when the sleeve plate 27 continues to displace forward, it can drive the movable frame 26 to contact the support cavity 25, so that the movable frame 26 can squeeze the support cavity 25 to drive the displacement base 31 to move forward. When the displacement base 31 moves to the front end, through the setting of the second baffle 47, the continuous movement of the displacement base 31 can be blocked. And when the front end of the displacement base 31 contacts the second baffle 47, the alignment cylinder 36 can move to be vertically aligned with the accumulation cavity 4, so that the alignment cylinder 36 can squeeze the L-shaped blocking plate 6 to move forward to the limit position, so that the motor iron core chips on the upper layer inside the accumulation cavity 4 can fall into the inside of the alignment cylinder 36, completing the work of reloading the motor iron core chips; When the device is in use, when the support ring 11 moves upward to reset, it can drive the first rack 13 past the first gear 33, so that the first gear 33 can be driven to rotate in the reverse direction, and thus the third rack 30 moves backward. At this time, the synchronous rod 32 can drive the positioning substrate 35 to be inserted into the alignment cylinder 36 again, so that it is convenient for the positioning substrate 35 to support the motor iron core chip inside the alignment cylinder 36. Moreover, since a transverse groove is formed inside the positioning substrate 35, it is convenient for the laser welding gun 12 to move downward through the positioning substrate 35 and continue to move downward to complete the work.

[0024] Embodiment 2 On the basis of Embodiment 1, as Figure 9 shown, the support bottom plate 48 further includes a guide plate 49, a buffer spring 50 and a support shell 51. The support shell 51 is fixedly installed at the rear bottom of the support bottom plate 48. The buffer springs 50 are symmetrically and fixedly installed at the inner bottom end of the support shell 51. The guide plate 49 is fixedly installed at the top end of the buffer spring 50.

[0025] When implementing this embodiment, when the welded motor iron core chip falls from inside the alignment cylinder 36, it can contact the guide plate 49. Since the top surface of the guide plate 49 is inclined at 45°, and a plastic gasket is fixedly installed on the top surface of the guide plate 49, it can avoid the rigid collision between the motor iron core chip and the guide plate 49. At the same time, due to the arrangement of the buffer spring 50, the impact force of the motor iron core chip falling downward can be effectively buffered, so that the motor iron core chip can slide downward along the top end of the guide plate 49 and be discharged to complete the work.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser welding device for a motor iron core, comprising a transmission component (3), wherein a conveying device (1) is fixedly installed at the front end of the top of the transmission component (3), and an alignment component (2) is fixedly installed at the rear end of the conveying device (1), characterized in that: The conveying device (1) includes an accumulation cavity (4), a first spring (5), an L-shaped blocking plate (6) and an extension frame (7). The extension frame (7) is symmetrically and fixedly installed at the front end of the accumulation cavity (4). The L-shaped blocking plate (6) is slidably sleeved on the extension frame (7). The first spring (5) is symmetrically and fixedly installed between the L-shaped blocking plate (6) and the accumulation cavity (4). The alignment component (2) includes a contact device (8) and a positioning device (9). The contact device (8) is fixedly installed at the bottom end of the positioning device (9). The positioning device (9) includes a front-end support (17), a positioning top plate (18), a hydraulic cylinder (19), a contact disc (20), a positioning cylinder (21) and a sleeve (22). The positioning top plate (18) is fixedly installed at the top end of the front-end support (17). The hydraulic cylinder (19) is fixedly installed on the positioning top plate (18). The contact disc (20) is fixedly installed at the bottom end of the hydraulic cylinder (19). Both the sleeve (22) and the positioning cylinder (21) are fixedly installed on the outer ring of the front-end support (17).

2. The laser welding device for the motor iron core according to claim 1, wherein: The contact device (8) includes a front guide frame (10), a support ring (11), a laser welding gun (12), a first rack (13), an extension side frame (14), a displacement rod (15) and a second spring (16). The displacement rod (15) and the second spring (16) are both fixedly installed at the top end of the support ring (11), and the displacement rod (15) and the second spring (16) are arranged alternately. The extension side frame (14) is symmetrically and fixedly installed at the front end of the support ring (11). The first rack (13) is fixedly installed at the bottom end of the extension side frame (14). The laser welding gun (12) is fixedly installed at the bottom end of the support ring (11), and the laser welding guns (12) are annularly distributed. The front guide frame (10) is symmetrically and fixedly installed at the top of the rear end of the support ring (11).

3. A laser welding device for a motor iron core according to claim 2, characterized in that: The transmission component (3) includes a displacement device (23) and a power device (24). The displacement device (23) is slidably sleeved on the top end of the power device (24).

4. A laser welding device for a motor iron core according to claim 3, characterized in that: The displacement device (23) includes a support cavity (25), a movable frame (26), a sleeve plate (27), a third spring (28), a second rack (29), a third rack (30), a displacement base (31), a synchronous rod (32), a first gear (33), a fourth spring (34), a positioning substrate (35) and a positioning cylinder (36). The positioning cylinder (36) is fixedly installed at the center of the top end of the displacement base (31). The support cavity (25) is fixedly installed at the rear sides of the displacement base (31). The third spring (28) is fixedly installed at the inner rear end of the support cavity (25). The movable frame (26) is fixedly installed behind the third spring (28). The sleeve plate (27) is fixedly installed behind the movable frame (26). The second rack (29) is fixedly installed at the bottom end of the sleeve plate (27). The positioning substrate (35) is slidably inserted into the inner front end of the positioning cylinder (36). The synchronous rod (32) is fixedly installed in front of the bottom of the positioning substrate (35). The fourth spring (34) is symmetrically fixedly installed between the synchronous rod (32) and the displacement base (31). The third rack (30) is fixedly installed at both ends of the synchronous rod (32). The first gear (33) is rotatably installed at the front sides of both sides of the displacement base (31).

5. A laser welding device for a motor iron core according to claim 4, characterized in that: The power device (24) includes a first baffle (37), a connecting rope (38), a photoelectric sensor (39), a shaft rod (40), a second gear (41), a guiding side rod (42), a lead screw (43), a driving motor (44), a transmission sprocket (45), a transmission chain (46), a second baffle (47) and a support bottom plate (48). The second baffle (47) is fixedly installed at the front end of the top of the support bottom plate (48). The first baffle (37) is fixedly installed at the rear end of the top of the support bottom plate (48). The second gear (41) is rotatably installed on both sides of the support bottom plate (48) close to the first baffle (37). The shaft rod (40) is fixedly installed between the two second gears (41). The connecting rope (38) is symmetrically fixedly installed on the outer ring of the shaft rod (40). The photoelectric sensor (39) is symmetrically fixedly installed at the top of the support bottom plate (48) close to the first baffle (37). The guiding side rod (42) is symmetrically fixedly installed at the top of the support bottom plate (48). The transmission sprocket (45) is symmetrically rotatably installed at the front end of the support bottom plate (48). The transmission chain (46) is meshingly sleeved on the outer ring of the transmission sprocket (45). The driving motor (44) is fixedly installed at the front end of the support bottom plate (48). The lead screw (43) is fixedly installed at the center of the rear end of the transmission sprocket (45).

6. The laser welding device for a motor iron core according to claim 5, characterized in that: The accumulation cavity (4) is fixedly installed at the front end of the top of the support base plate (48). The displacement rod (15) is slidably inserted into the inner bottom end of the positioning cylinder (21). The top end of the second spring (16) is connected to the inner top end of the sleeve (22). The front end bracket (17) is fixedly installed at the rear end of the accumulation cavity (4). The bottom end of the front guide frame (10) is connected to the top end of the connecting rope (38). The displacement base (31) is slidably sleeved on the guide side rod (42). The sleeve plate (27) is threadedly sleeved on the lead screw (43). The first gear (33) meshes with the third rack (30).

7. A laser welding device for a motor iron core according to claim 6, characterized in that: The inner top end of the L-shaped blocking plate (6) is flush with the bottom end of the accumulation cavity (4). Vertical grooves are formed around the alignment cylinder (36). A horizontal groove is formed in the center of the inner part of the positioning base plate (35). Through holes are formed in the inner side end of the sleeve plate (27) close to the alignment cylinder (36).

8. A laser welding device for a motor iron core according to claim 7, characterized in that: A discharge hole is formed in the center of the bottom end of the displacement base (31). The photoelectric sensor (39) is electrically connected to the hydraulic cylinder (19). A square groove is formed in the inner rear end of the support base plate (48). The top end of the alignment cylinder (36) is flush with the bottom end of the accumulation cavity (4).

9. A laser welding device for a motor iron core according to claim 8, characterized in that: The support base plate (48) further includes a guide plate (49), a buffer spring (50) and a support shell (51). The support shell (51) is fixedly installed at the rear of the bottom of the support base plate (48). The buffer springs (50) are symmetrically and fixedly installed at the inner bottom end of the support shell (51). The guide plate (49) is fixedly installed at the top end of the buffer spring (50).

10. A welding method for a laser welding device of an electric machine iron core, using the laser welding device for an electric machine iron core described in claim 9, characterized in that, It includes the following steps: S1. First, stack the motor iron cores in the inner part of the accumulation cavity (4) so that the motor iron cores can be placed in the inner part of the alignment cylinder (36). Subsequently, start the driving motor (44) to drive the lead screw (43) to rotate, so that the displacement base (31) can displace backward. At this time, the alignment cylinder (36) can drive the motor iron cores to displace, and the L-shaped blocking plate (6) closes the bottom end of the accumulation cavity (4). S2. Then, when the displacement base (31) displaces to contact the first baffle (37), the alignment cylinder (36) can be vertically aligned with the contact disc (20). At this time, the sleeve plate (27) can continue to displace backward, so that the second rack (29) can drive the second gear (41) to rotate, causing the connecting rope (38) to pull the support ring (11) to displace downward. At this time, the support ring (11) can contact the photoelectric sensor (39) to start the hydraulic cylinder (19), so that the contact disc (20) can press the motor iron cores in the alignment cylinder (36). At the same time, when the laser welding gun (12) senses the motor iron cores, it can perform welding work from top to bottom. S3. Finally, when the support ring (11) is about to move downward to the limit position, the first rack (13) can engage with the first gear (33). At this time, the first rack (13) drives the third rack (30) to displace forward through the first gear (33), so that the positioning substrate (35) can be pulled out from the inside of the alignment cylinder (36). Until the laser welding gun (12) completely passes through all the motor iron cores, when the first rack (13) subsequently displaces, it can drive the third rack (30) to move forward to the limit position, so that the welded motor iron cores can fall out from the inside of the displacement base (31), completing the welding work of the motor iron cores.

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