Rear longitudinal beam energy absorption box laser welding equipment and welding process

Abstract

The invention discloses rear longitudinal beam energy absorption box laser welding equipment and a welding process, and relates to the technical field of laser welding equipment.The rear longitudinal beam energy absorption box laser welding equipment comprises a servo motor, the output end of the servo motor is rotationally connected with a transmission part, and the end, away from the servo motor, of the transmission part is rotationally connected with a rotating shaft; a protective shell is rotatably connected to the side, close to the moving assembly, of the rotating shaft and fixedly connected with the moving assembly, a compression spring is fixedly connected to the outer side of the protective shell, a fixing ring is fixedly connected to the end, away from the protective shell, of the compression spring, and a circular ring is fixedly connected to the outer side, close to the fixing ring, of the rotating shaft. The ends, away from the moving assemblies, of the rotating shafts are fixedly connected with welding pieces. According to the rear longitudinal beam energy absorption box laser welding equipment and the welding process, the fixing ring and the circular ring are arranged to be meshed, a welding piece stops rotating and deviating, the self-locking effect is achieved, the welding gun angle deviation caused by external factors can be effectively prevented, and it is ensured that welding work can be normally conducted under various working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding equipment, and in particular to a laser welding equipment and a welding process for a rear longitudinal beam energy absorption box. Background Art

[0002] At present, with the popularization of automobiles and the improvement of people's living standards, people are gradually focusing on the safety performance of automobiles. In terms of safety performance, the anti-collision safety performance of automobiles is highly valued. In current automobile design, a bumper system installed at the front and rear of the car is usually used to ensure that the car body frame is not seriously damaged in a low-speed collision, thereby ensuring the safety of the occupants and the main structure of the car itself. In order to absorb the kinetic energy of the collision as much as possible, a deformation element, namely a collision energy absorption box, is often added to the current bumper system design.

[0003] In the related art, the energy absorption box includes a support plate and a fixed frame, and the support plate and the fixed frame form an installation box. A shock-absorbing buffer mechanism is provided inside the installation box to buffer the vibration generated when the car collides. The connection between the fixed frame and the support plate generally requires a welding process. Often, the staff manually aligns the support plate and the fixed frame for welding. When the staff manually aligns the support plate and the fixed frame for welding, there is shaking, which will cause a large deviation in the welding position during welding. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A rear longitudinal beam energy absorption box laser welding device, comprising a base, the outer side of the base is fixedly connected to a driving motor, the top of the base is provided with a square hole, the inside of the square hole is rotatably connected to a screw rod, the screw rod passes through the square hole and is fixedly connected to the driving motor; A moving component is fixedly mounted on the top of the base and is located at the rear end of the square hole; A welding assembly, wherein the welding assembly is fixedly mounted on the moving assembly; A fixing component is fixedly installed on the top of the base, the fixing component and the square hole are located on the same vertical plane, and the outer side of the fixing component is fixedly connected with a motor; A positioning component, the positioning component is slidably connected to the square hole; Wherein, the welding assembly includes a servo motor, the output end of the servo motor is rotatably connected with a transmission part, the servo motor is fixedly installed on the outside of the moving assembly, the end of the transmission part away from the servo motor is rotatably connected with a rotating shaft, the rotating shaft is rotatably connected with the moving assembly, the rotating shaft and the servo motor are located on two adjacent surfaces of the moving assembly, and the side of the rotating shaft close to the moving assembly is rotatably connected with a protective shell, the servo motor is connected to an external power supply to work, the servo motor drives the rotating shaft to rotate through the transmission part, the rotating shaft drives the circular ring to rotate, the circular ring and the fixed ring are relatively squeezed, so that the compression spring is compressed and deformed by pressure, so that the fixed ring moves on the outside of the rotating shaft toward the direction away from the circular ring, so that the circular ring drives the welding part to rotate, and then the inclination angle of the welding part is adjusted. After adjustment, the servo motor stops working, and the fixed ring is reset under the elastic force of the compression spring. At this time, the fixed ring and the circular ring are meshed with each other, the welding part stops rotating and deviating, which plays a self-locking role. The inclination angle self-locking can ensure that the welding part always maintains the set precise inclination angle, and the welding part The change of the gun angle during the welding process will lead to uneven distribution of laser energy, which may cause problems such as uneven weld width and inconsistent penetration depth. The self-locking function effectively avoids this situation, thereby ensuring the stability of welding quality and improving the strength and sealing of the weld joint. The stable tilt angle is conducive to the formation of high-quality welds. When the angle is fixed, the laser energy can act evenly on the welding part, making the parameters such as the penetration depth and width of the weld more uniform, reducing the occurrence of welding defects. The protective shell is fixedly connected to the moving component, and a compression spring is fixedly connected to the outside of the protective shell. A fixed ring is fixedly connected to the end of the compression spring away from the protective shell, and a circular ring is fixedly connected to the outside of the rotating shaft near the fixed ring. The fixed ring is slidably connected to the rotating shaft, and a welding piece is fixedly connected to the end of the rotating shaft away from the moving component. The contact surface between the fixed ring and the circular ring is a gear meshing setting. By setting the meshing between the fixed ring and the circular ring, the welding gun angle deviation caused by external factors can be effectively prevented, ensuring that the welding work can be carried out normally under various working conditions.

[0005] Preferably, the moving assembly includes a transverse axis, which is fixedly mounted on the top of the base, the top of the transverse axis is slidably connected to the longitudinal axis, and the outer side of the longitudinal axis is slidably connected to the moving axis. After the material is fixed, the longitudinal axis moves on the transverse axis, the moving axis moves on the longitudinal axis, and the moving plate moves on the moving axis, so that it can move in three directions, so that the welding assembly is moved to the welding position, the transverse axis, the longitudinal axis and the moving axis are arranged perpendicular to each other, the outer side of the moving axis is slidably connected to the moving plate, the top of the moving plate is fixedly connected to a connecting belt, and the moving plate is rotatably connected to the rotating shaft.

[0006] Preferably, the welding part includes a fixing plate, which is fixedly connected to the rotating shaft, a welding gun is fixedly connected to the bottom of the fixing plate, and a bracket is fixedly connected to the outer side of the welding gun. Since the energy absorption box is placed horizontally, welding is performed in the vertical direction at this time. When the moving assembly drives the welding assembly to the welding position, the limit plates on both sides of the welding gun are respectively in contact with the two materials to be welded, so that the welding gun can be accurately located at the welding position, which greatly reduces the position deviation of the welding gun caused by human operating errors or equipment vibrations, improves the quality of the welding joint, and reduces the probability of welding defects such as incomplete welding and welding deviation. The end of the bracket is fixedly connected to the limit plate, and the number of the limit plates is two The two limit plates are symmetrically arranged with the bracket as the center, the angle between the two limit plates is a right angle, and the limit plates on both sides are vertically arranged. During the welding process, the welding gun will be subjected to various forces, and the contact between the limit plates on both sides and the materials to be processed provides stable support and constraint for the welding gun, so that it can maintain a relatively static state during welding, reducing unnecessary jitter and displacement, and ensuring that the welding gun can stably act on the welding part, thereby making the parameters such as the penetration depth and penetration width of the weld more uniform and stable, which is beneficial to improving the welding quality. The fixed plate is fixedly connected to the outside of the limit plate near the limit plate, and the side plate is fixedly connected to the limit plate. The limit plate is fixedly connected to the side of the welding gun near the limit plate with a bent plate.

[0007] Preferably, the fixing assembly includes a support plate, which is fixedly mounted on the top of the base, and a fixing seat is fixedly connected to one side of the support plate close to the square hole, and a through hole is opened on the outer side of the fixing seat, and there are multiple through holes, and the multiple through holes are evenly distributed around the fixing seat as the center, and a spring plate is fixedly connected to the inside of the through hole, and the spring plate is L-shaped, and one end of the spring plate is located inside the inclined groove. In the initial state, under the elastic force of the spring plates on both sides, the spring plate is squeezed between the inclined groove and the moving block, and under the action of the squeezing force, the moving block is located near the middle of the round rod, and the workpiece to be processed is moved to the workpiece body. The material is placed inside the fixed seat, and the energy absorbing box is sleeved on the outside of the round rod. The energy absorbing box and the moving block are in contact and squeezed, so that the moving block moves away from the energy absorbing box, thereby clamping the material. Since the energy absorbing box is mostly irregular or cylindrical, by setting a spring plate, multiple moving blocks clamp the energy absorbing box in multiple directions, so that the clamping force can be evenly distributed, and then during the processing, the energy absorbing box is prevented from being displaced and shaken due to external force, which affects the processing accuracy and reduces the product quality. The movable block is slidably connected to the part, the spring plate is symmetrically arranged with the movable block as the center, an inclined groove is opened on the side of the movable block close to the spring plate, the inner wall of the through hole close to the inclined groove is fixedly connected to the limit block, the limit block is symmetrically arranged with the movable block as the center, a cylinder is fixedly connected to the inner wall of the through hole, an annular hole is opened in the middle of the outer side of the movable block, the cylinder is located inside the annular hole, the fixed seat is fixedly connected to the motor, the motor is connected to the external power supply to work, the motor drives the fixed seat to rotate, and the friction between the fixed sleeve and the circular plate drives the energy absorption box and the frame to rotate, thereby welding the material A round rod is fixedly connected to the middle part of the fixing seat, and a reset spring is fixedly connected to the end of the round rod away from the fixing seat. By arranging the reset spring, the energy absorption box is in close contact with the frame to prevent gaps or loose contact at the welding point, avoid uneven filling of the welding molten pool, and easily produce welding defects such as pores, slag inclusions, and incomplete penetration, thereby reducing the strength of the welded joint, affecting the energy absorption and force transmission performance of the energy absorption box at the critical moment, and failing to ensure the collision safety of the vehicle. A fixed sleeve is provided on the outer side of the round rod close to the reset spring, and the fixed sleeve is slidably connected to the round rod.

[0008] The positioning assembly includes a slider, which is slidably connected to the inner wall of the square hole, and the slider is threadedly connected to the screw. The top of the slider is fixedly connected to a square plate. The frame welded to the energy absorption box is placed on the circular plate, and bolts are placed inside multiple circular holes on the side of the frame to position and fix the frame, which is convenient for loading and unloading. After the frame and the energy absorption box are placed, the drive motor is connected to an external power supply, and the drive motor drives the screw to rotate. The screw drives the slider to move inside the square hole toward the direction of the fixed assembly, so that the fixed sleeve contacts the circular plate, thereby docking the energy absorption box and the frame. The square plate is rotatably connected to the circular plate, and a circular hole is opened on the outside of the circular plate, and a threaded groove is provided inside the circular hole.

[0009] A laser welding process for a rear longitudinal beam energy absorption box includes the following steps: S1. Fix the material. Place the material to be processed inside the fixed seat. The energy absorbing box is sleeved on the outside of the round rod. The energy absorbing box and the moving block are in contact and squeezed. Under the elastic force of the spring plate, multiple moving blocks clamp the energy absorbing box in multiple directions. S2, angle adjustment, the servo motor drives the shaft to rotate, the shaft drives the ring to rotate, the ring and the fixed ring are squeezed relative to each other, the compression spring is compressed and deformed, so that the fixed ring moves away from the ring, and the ring drives the weldment to rotate; S3, mobile positioning, when the mobile assembly drives the welding assembly to move to the welding position, the limit plates on both sides of the welding gun are in contact with the two materials to be welded respectively, so that the welding gun can be accurately positioned at the welding position; S4, welding materials, the motor drives the fixed seat to rotate, and through the friction between the fixed sleeve and the circular plate, the energy absorption box and the frame are driven to rotate, and then the materials are welded.

[0010] The present invention provides a laser welding device and welding process for a rear longitudinal beam energy absorption box, which has the following beneficial effects: 1. The laser welding equipment for the energy absorption box of the rear longitudinal beam meshes with the fixed ring and the circular ring, so that the welded parts stop rotating and deviating, and play a self-locking role. The self-locking of the tilt angle can ensure that the energy absorption box of the absorption box always maintains the set precise tilt angle.

[0011] 2. The rear longitudinal beam energy absorption box laser welding equipment is conducive to forming high-quality welds through a stable tilt angle. When the angle is fixed, the laser energy can act evenly on the welding position, making the weld depth, weld width and other parameters more uniform and reducing the occurrence of welding defects.

[0012] 3. The laser welding equipment for the energy absorption box of the rear longitudinal beam contacts the two materials to be welded respectively through the limit plates on both sides of the welding gun, so that the welding gun can be accurately positioned at the welding point, which greatly reduces the position deviation of the welding gun caused by human operating errors or equipment vibration and improves the quality of the welding joint.

[0013] 4. The laser welding equipment for the rear longitudinal beam energy absorption box is vertically set by the limit plates on both sides. During the welding process, the welding gun will be subjected to various forces, and the contact between the limit plates on both sides and the material to be processed provides stable support and constraint for the welding gun, so that it can maintain a relatively static state during welding, reducing unnecessary shaking and displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the external structure of a laser welding device and welding process of a rear longitudinal beam energy absorption box of the present invention; Figure 2It is another side view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the local structure of the present invention; Figure 4 This is a schematic diagram of the structure of the mobile assembly of the present invention; Figure 5 This is a schematic diagram of the structure of the welding assembly of the present invention; Figure 6 It is a schematic diagram of the structure of the welding part of the present invention; Figure 7 It is a schematic diagram of the structure of the fixing assembly of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the fixing assembly of the present invention; Fig. 9 It is a schematic diagram of the local structure of the fixing assembly of the present invention; Fig.10 This is a schematic diagram of the positioning assembly structure of the present invention; Fig.11 It is a schematic diagram of the welding process of the present invention.

[0015] In the figure: 1, base; 2, moving assembly; 21, horizontal axis; 22, vertical axis; 23, moving axis; 24, connecting belt; 25, moving plate; 3, welding assembly; 31, servo motor; 32, transmission part; 33, protective shell; 34, compression spring; 35, fixing ring; 36, circular ring; 37, rotating shaft; 38, welding part; 381, fixing plate; 382, ​​welding gun; 383, bracket; 384, limit plate; 385, bending plate; 386. Side plate; 4. Fixing assembly; 41. Support plate; 42. Fixing seat; 43. Round rod; 44. Fixing sleeve; 45. Return spring; 46. Ring hole; 47. Moving block; 48. Bevel groove; 49. Spring plate; 410. Limit block; 411. Through hole; 412. Cylinder; 5. Positioning assembly; 51. Slider; 52. Square plate; 53. Round plate; 54. Round hole; 6. Driving motor; 7. Electric motor; 8. Square hole; 9. Screw. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0017] The first embodiment, as Figures 1 to 5As shown, the present invention provides a technical solution: a laser welding device and welding process for a rear longitudinal beam energy absorption box, comprising a base 1, a driving motor 6 is fixedly connected to the outside of the base 1, a square hole 8 is opened on the top of the base 1, a screw 9 is rotatably connected inside the square hole 8, and the screw 9 passes through the square hole 8 and is fixedly connected to the driving motor 6; A moving component 2, which is fixedly mounted on the top of the base 1 and is located at the rear end of the square hole 8; A welding assembly 3, wherein the welding assembly 3 is fixedly mounted on the moving assembly 2; A fixing component 4, which is fixedly mounted on the top of the base 1, the fixing component 4 and the square hole 8 are located on the same vertical plane, and the outer side of the fixing component 4 is fixedly connected with a motor 7; A positioning component 5, the positioning component 5 is slidably connected to the square hole 8; The welding assembly 3 includes a servo motor 31, the output end of the servo motor 31 is rotatably connected to a transmission member 32, the servo motor 31 is fixedly mounted on the outside of the moving assembly 2, the end of the transmission member 32 away from the servo motor 31 is rotatably connected to a shaft 37, the shaft 37 is rotatably connected to the moving assembly 2, the shaft 37 and the servo motor 31 are located on two adjacent surfaces of the moving assembly 2, the side of the shaft 37 close to the moving assembly 2 is rotatably connected to a protective shell 33, the servo motor 31 is connected to an external power supply to work, the servo motor 31 works by driving the shaft 37 to rotate through the transmission member 32, and the shaft 37 drives the circular The ring 36 rotates, and the circular ring 36 and the fixed ring 35 are relatively squeezed, so that the compression spring 34 is compressed and deformed by the pressure, so that the fixed ring 35 moves on the outer side of the rotating shaft 37 in the direction away from the circular ring 36, so that the circular ring 36 drives the welding part 38 to rotate, and then the inclination angle of the welding part 38 is adjusted. After the adjustment, the servo motor 31 stops working, and the fixed ring 35 is reset under the elastic force of the compression spring 34. At this time, the fixed ring 35 and the circular ring 36 are meshed with each other, and the welding part 38 stops rotating and deviating, which plays a self-locking role. The self-locking of the inclination angle can ensure the welding The components are always kept at the set precise tilt angle. The change of the welding gun angle during the welding process will lead to uneven distribution of laser energy, which may cause problems such as uneven weld width and inconsistent penetration depth. The self-locking function effectively avoids this situation, thereby ensuring the stability of welding quality and improving the strength and sealing of the welded joint. The stable tilt angle is conducive to the formation of high-quality welds. When the angle is fixed, the laser energy can act evenly on the welding part, making the weld penetration depth, weld width and other parameters more uniform, reducing the occurrence of welding defects. The protective shell 33 is fixedly connected to the mobile component 2 Then, a compression spring 34 is fixedly connected to the outer side of the protective shell 33, and a fixing ring 35 is fixedly connected to the end of the compression spring 34 away from the protective shell 33. A circular ring 36 is fixedly connected to the outer side of the rotating shaft 37 near the fixing ring 35. The fixing ring 35 is slidably connected to the rotating shaft 37, and a welding part 38 is fixedly connected to the end of the rotating shaft 37 away from the moving component 2. The contact surface between the fixing ring 35 and the circular ring 36 is a gear meshing setting. By setting the meshing between the fixing ring 35 and the circular ring 36, the welding gun angle deviation caused by external factors can be effectively prevented, ensuring that the welding work can be carried out normally under various working conditions.

[0018] The moving assembly 2 includes a transverse axis 21, which is fixedly installed on the top of the base 1. The top of the transverse axis 21 is slidably connected to the longitudinal axis 22, and the outer side of the longitudinal axis 22 is slidably connected to the moving axis 23. After the material is fixed, the longitudinal axis 22 moves on the transverse axis 21, the moving axis 23 moves on the longitudinal axis 22, and the moving plate 25 moves on the moving axis 23, so that it can move in three directions, so that the welding assembly 3 is moved to the welding position. The transverse axis 21, the longitudinal axis 22 and the moving axis 23 are arranged perpendicular to each other, and the outer side of the moving axis 23 is slidably connected to the moving plate 25, and the top of the moving plate 25 is fixedly connected to the connecting belt 24, and the moving plate 25 is rotatably connected to the rotating shaft 37.

[0019] The second embodiment is based on the first embodiment. Figure 6 As shown, the welding part 38 includes a fixed plate 381, which is fixedly connected to the rotating shaft 37. A welding gun 382 is fixedly connected to the bottom of the fixed plate 381, and a bracket 383 is fixedly connected to the outer side of the welding gun 382. Since the energy absorption box is placed horizontally, welding is performed in the vertical direction at this time. When the moving component 2 drives the welding component 3 to move to the welding position, the limiting plates 384 on both sides of the welding gun 382 are respectively in contact with the two materials to be welded, so that the welding gun can be accurately located at the welding position, which greatly reduces the position deviation of the welding gun caused by human operating errors or equipment vibrations, improves the quality of the welding joint, and reduces the probability of welding defects such as incomplete penetration and welding deviation. The end of the bracket 383 is fixedly connected to the limiting plate 384, and the number of the limiting plates 384 is Two, two limit plates 384 are symmetrically arranged with the bracket 383 as the center, the angle between the two limit plates 384 is a right angle, and the limit plates 384 on both sides are vertically arranged. During the welding process, the welding gun will be subjected to various forces, and the contact between the limit plates on both sides and the material to be processed provides stable support and constraint for the welding gun, so that it can maintain a relatively static state during welding, reducing unnecessary shaking and displacement, and ensuring that the welding gun can stably act on the welding part, thereby making the parameters such as the penetration depth and penetration width of the weld more uniform and stable, which is beneficial to improving the welding quality. The fixed plate 381 is fixedly connected to the outer side of the limit plate 384 near the side plate 386, and the side plate 386 is fixedly connected to the limit plate 384. The limit plate 384 is fixedly connected to the side of the welding gun 382 with a bent plate 385.

[0020] The third embodiment is based on the first and second embodiments. Figures 7 to 11As shown, the fixing assembly 4 includes a support plate 41, which is fixedly mounted on the top of the base 1, and a fixing seat 42 is fixedly connected to one side of the support plate 41 close to the square hole 8. A through hole 411 is provided on the outer side of the fixing seat 42. There are multiple through holes 411, and the multiple through holes 411 are evenly distributed around the fixing seat 42. A spring plate 49 is fixedly connected to the inside of the through hole 411. The spring plate 49 is L-shaped, and one end of the spring plate 49 is located inside the inclined groove 48. In the initial state, under the elastic force of the spring plates 49 on both sides, the spring plates 49 are squeezed between the inclined groove 48 and the moving block 47. Under the action of the squeezing force, the moving block 47 is located close to The material to be processed is placed inside the fixed seat 42 in the middle of the round rod 43, and the energy absorbing box is sleeved on the outside of the round rod 43. The energy absorbing box contacts and squeezes the moving block 47, so that the moving block 47 moves away from the energy absorbing box, thereby clamping the material. Since the energy absorbing box is mostly irregular or cylindrical, by setting the spring plate 49, multiple moving blocks 47 clamp the energy absorbing box in multiple directions, so that the clamping force can be evenly distributed, and then in the processing process, the energy absorbing box is prevented from being displaced and shaken due to external force, thereby affecting the processing accuracy and reducing the product quality. The internal sliding connection of the through hole 411 has The moving block 47 and the spring plate 49 are symmetrically arranged with the moving block 47 as the center. The moving block 47 is provided with an oblique groove 48 on one side close to the spring plate 49. The inner wall of the through hole 411 close to the oblique groove 48 is fixedly connected to the limit block 410. The limit block 410 is symmetrically arranged with the moving block 47 as the center. The inner wall of the through hole 411 is fixedly connected with a cylinder 412. The middle of the outer side of the moving block 47 is provided with an annular hole 46. The cylinder 412 is located inside the annular hole 46. The fixed seat 42 is fixedly connected to the motor 7. The motor 7 is connected to an external power supply to work. The motor 7 drives the fixed seat 42 to rotate, and the friction between the fixed sleeve 44 and the circular plate 53 drives the energy absorption box and the frame The frame rotates to weld the material. A round rod 43 is fixedly connected to the middle of the fixed seat 42. A return spring 45 is fixedly connected to the end of the round rod 43 away from the fixed seat 42. The return spring 45 is arranged to make the energy absorption box in close contact with the frame to prevent gaps or loose contact at the welding point, avoid uneven filling of the welding molten pool, and easily produce welding defects such as pores, slag inclusions, and incomplete penetration, thereby reducing the strength of the welded joint, affecting the energy absorption and force transmission performance of the energy absorption box at the critical moment, and failing to ensure the collision safety of the vehicle. A fixed sleeve 44 is provided on the outer side of the round rod 43 near the return spring 45, and the fixed sleeve 44 is slidably connected to the round rod 43.

[0021] The positioning assembly 5 includes a slider 51, which is slidably connected to the inner wall of the square hole 8. The slider 51 is threadedly connected to the screw 9. The top of the slider 51 is fixedly connected to a square plate 52. The frame welded to the energy absorption box is placed on a circular plate 53. Bolts are placed inside multiple circular holes 54 on the side of the frame to position and fix the frame, which is convenient for loading and unloading. After the frame and the energy absorption box are placed, the drive motor 6 is connected to an external power supply to work. The drive motor 6 drives the screw 9 to rotate. The screw 9 drives the slider 51 to move inside the square hole 8 toward the direction of the fixing assembly 4, so that the fixing sleeve 44 contacts the circular plate 53, thereby docking the energy absorption box and the frame. The inside of the square plate 52 is rotatably connected to the circular plate 53. A circular hole 54 is opened on the outside of the circular plate 53, and a threaded groove is provided inside the circular hole 54.

[0022] A laser welding process for a rear longitudinal beam energy absorption box includes the following steps: S1. Fix the material. Place the material to be processed inside the fixed seat 42. The energy absorbing box is sleeved on the outside of the round rod 43. The energy absorbing box and the moving block 47 are in contact and squeezed. Under the elastic force of the spring plate 49, the multiple moving blocks 47 clamp the energy absorbing box in multiple directions. S2, angle adjustment, the servo motor 31 drives the rotating shaft 37 to rotate, the rotating shaft 37 drives the circular ring 36 to rotate, the circular ring 36 and the fixed ring 35 are relatively squeezed, the compression spring 34 is compressed and deformed, so that the fixed ring 35 moves away from the circular ring 36, so that the circular ring 36 drives the welding part 38 to rotate; S3, moving and positioning, when the moving assembly 2 drives the welding assembly 3 to move to the welding position, the limiting plates 384 on both sides of the welding gun 382 are respectively in contact with the two materials to be welded, so that the welding gun can be accurately positioned at the welding position; S4, welding materials, the motor 7 drives the fixed seat 42 to rotate, and through the friction between the fixed sleeve 44 and the circular plate 53, the energy absorption box and the frame are driven to rotate, and then the materials are welded.

[0023] When in use, the frame welded with the energy absorbing box is placed on the circular plate 53, and the frame is positioned and fixed by placing bolts inside the multiple circular holes 54 on the side of the frame to facilitate loading and unloading. The material to be processed is placed inside the fixed seat 42, and the energy absorbing box is sleeved on the outside of the round rod 43. The energy absorbing box and the moving block 47 are in contact and squeezed, so that the moving block 47 moves away from the energy absorbing box, thereby clamping the material. Since the energy absorbing box is mostly irregularly shaped or cylindrical, by setting a spring plate 49, multiple moving blocks 47 clamp the energy absorbing box in multiple directions. After placing the frame and the energy absorbing box, the external power supply of the driving motor 6 works, and the driving motor 6 drives the screw 9 to rotate. The screw 9 drives the slider 51 to move inside the square hole 8 toward the fixed component 4, so that the fixing sleeve 44 contacts the circular plate 53, thereby docking the energy absorbing box and the frame.

[0024] After the materials are fixed, the longitudinal axis 22 moves on the transverse axis 21, the movable axis 23 moves on the longitudinal axis 22, and the movable plate 25 moves on the movable axis 23, so that it can move in three directions, so that the welding assembly 3 is moved to the welding position, so that the limit plates 384 on both sides of the welding gun 382 are respectively in contact with the two materials to be welded, so that the welding gun can be accurately located at the welding position.

[0025] The motor 7 drives the fixing seat 42 to rotate, and through the friction between the fixing sleeve 44 and the circular plate 53, the energy absorbing box and the frame are driven to rotate, thereby welding the material.

[0026] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A laser welding device for a rear longitudinal beam energy absorption box, characterized in that: include: A base (1), the outer side of the base (1) being fixedly connected to a driving motor (6), the top of the base (1) being provided with a square hole (8), the interior of the square hole (8) being rotatably connected to a screw rod (9), the screw rod (9) passing through the square hole (8) and being fixedly connected to the driving motor (6); A moving component (2), the moving component (2) being fixedly mounted on the top of the base (1), the moving component (2) being located at the rear end of the square hole (8); A welding assembly (3), wherein the welding assembly (3) is fixedly mounted on the moving assembly (2); A fixing component (4), the fixing component (4) being fixedly mounted on the top of the base (1), the fixing component (4) and the square hole (8) being located on the same vertical plane, and the outer side of the fixing component (4) being fixedly connected to a motor (7); A positioning component (5), wherein the positioning component (5) is slidably connected to the square hole (8); The welding assembly (3) comprises a servo motor (31), an output end of the servo motor (31) is rotatably connected to a transmission member (32), the servo motor (31) is fixedly mounted on the outside of the moving assembly (2), one end of the transmission member (32) away from the servo motor (31) is rotatably connected to a rotating shaft (37), the rotating shaft (37) is rotatably connected to the moving assembly (2), the rotating shaft (37) and the servo motor (31) are located on two adjacent surfaces of the moving assembly (2), and a protective shell (33) is rotatably connected to a side of the rotating shaft (37) close to the moving assembly (2). The protective shell (33) is fixedly connected to the moving assembly (2); a compression spring (34) is fixedly connected to the outer side of the protective shell (33); a fixing ring (35) is fixedly connected to one end of the compression spring (34) away from the protective shell (33); a circular ring (36) is fixedly connected to the outer side of the rotating shaft (37) close to the fixing ring (35); the fixing ring (35) is slidably connected to the rotating shaft (37); a welding piece (38) is fixedly connected to one end of the rotating shaft (37) away from the moving assembly (2); and the contact surfaces of the fixing ring (35) and the circular ring (36) are gear meshing arrangements.

2. The rear longitudinal beam energy absorption box laser welding equipment according to claim 1 is characterized in that: The moving assembly (2) comprises a transverse axis (21), the transverse axis (21) being fixedly mounted on the top of the base (1), the top of the transverse axis (21) being slidably connected to a longitudinal axis (22), the outer side of the longitudinal axis (22) being slidably connected to a moving axis (23), the transverse axis (21), the longitudinal axis (22) and the moving axis (23) being arranged perpendicular to each other, the outer side of the moving axis (23) being slidably connected to a moving plate (25), the top of the moving plate (25) being fixedly connected to a connecting belt (24), and the moving plate (25) being rotatably connected to a rotating shaft (37).

3. The rear longitudinal beam energy absorption box laser welding equipment according to claim 2 is characterized in that: The welding member (38) comprises a fixing plate (381), the fixing plate (381) being fixedly connected to the rotating shaft (37), a welding gun (382) being fixedly connected to the bottom of the fixing plate (381), a bracket (383) being fixedly connected to the outside of the welding gun (382), and a limiting plate (384) being fixedly connected to the end of the bracket (383).

4. The rear longitudinal beam energy absorption box laser welding equipment according to claim 3 is characterized in that: There are two limit plates (384), the two limit plates (384) are symmetrically arranged with the bracket (383) as the center, the angle between the two limit plates (384) is a right angle, the fixed plate (381) is fixedly connected to the outer side of the limit plate (384) close to the side of the limit plate (384), the side plate (386) is fixedly connected to the limit plate (384), and the limit plate (384) is fixedly connected to a bent plate (385) on one side close to the welding gun (382).

5. The rear longitudinal beam energy absorption box laser welding equipment according to claim 4 is characterized in that: The fixing assembly (4) comprises a support plate (41), the support plate (41) being fixedly mounted on the top of the base (1), a side of the support plate (41) close to the square hole (8) being fixedly connected to a fixing seat (42), a through hole (411) being provided on the outer side of the fixing seat (42), a plurality of through holes (411) being provided, and the plurality of through holes (411) being evenly distributed around the fixing seat (42).

6. The rear longitudinal beam energy absorption box laser welding equipment according to claim 5, characterized in that: A spring plate (49) is fixedly connected to the interior of the through hole (411), a moving block (47) is slidably connected to the interior of the through hole (411), the spring plate (49) is symmetrically arranged with the moving block (47) as the center, and an inclined groove (48) is provided on a side of the moving block (47) close to the spring plate (49).

7. The rear longitudinal beam energy absorption box laser welding equipment according to claim 6, characterized in that: A limit block (410) is fixedly connected to the inner wall of the through hole (411) close to the inclined groove (48); the limit block (410) is symmetrically arranged with the moving block (47) as the center; a cylinder (412) is fixedly connected to the inner wall of the through hole (411); an annular hole (46) is provided in the middle of the outer side of the moving block (47); and the cylinder (412) is located inside the annular hole (46).

8. The rear longitudinal beam energy absorption box laser welding equipment according to claim 7, characterized in that: The fixing seat (42) is fixedly connected to the motor (7); a round rod (43) is fixedly connected to the middle of the fixing seat (42); an end of the round rod (43) away from the fixing seat (42) is fixedly connected to a return spring (45); a fixing sleeve (44) is sleeved on the outer side of the round rod (43) close to the return spring (45); and the fixing sleeve (44) is slidably connected to the round rod (43).

9. The rear longitudinal beam energy absorption box laser welding equipment according to claim 1, characterized in that: The positioning assembly (5) comprises a slider (51), the slider (51) being slidably connected to the inner wall of the square hole (8), the slider (51) being threadedly connected to the screw rod (9), the top of the slider (51) being fixedly connected to a square plate (52), the inside of the square plate (52) being rotatably connected to a circular plate (53), and the outer side of the circular plate (53) being provided with a circular hole (54).

10. A laser welding process for a rear longitudinal beam energy absorption box, characterized in that: It includes the following steps: S1. Fixing the material: placing the material to be processed inside the fixing seat (42), sleeved on the outside of the round rod (43), the energy absorbing box and the moving block (47) are in contact and squeezed, and under the elastic force of the spring plate (49), the multiple moving blocks (47) clamp the energy absorbing box in multiple directions; S2, angle adjustment, the servo motor (31) drives the rotating shaft (37) to rotate, the rotating shaft (37) drives the circular ring (36) to rotate, the circular ring (36) and the fixed ring (35) are relatively squeezed, the compression spring (34) is compressed and deformed, so that the fixed ring (35) moves away from the circular ring (36), so that the circular ring (36) drives the welded part (38) to rotate; S3, moving and positioning, when the moving component (2) drives the welding component (3) to move to the welding position, the limiting plates (384) on both sides of the welding gun (382) are respectively in contact with the two materials to be welded, so that the welding gun can be accurately positioned at the welding position; S4, welding the material, the motor (7) drives the fixed seat (42) to rotate, and through the friction between the fixed sleeve (44) and the circular plate (53), the energy absorption box and the frame are driven to rotate, thereby welding the material.

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