Laser welding device for electrical equipment machining

Abstract

The invention belongs to the technical field of laser welding, and particularly relates to a laser welding device for electrical equipment machining, which comprises a bottom plate, a placing plate and a mechanical arm are mounted on the bottom plate, and a laser welding head is mounted on the mechanical arm; a lifting column is mounted on the placing plate, and a ball is mounted on the lifting column; the lifting column comprises an upper ejector rod and a lower ejector rod, the lower ejector rod is installed at the lower end of the upper ejector rod in a sliding mode, a buffer spring is installed between the upper ejector rod and the lower ejector rod, and the lower ejector rod is driven by a motor to ascend and descend. An elastic layer is installed on the upper ejector rod, a vent hole is formed in the upper ejector rod and communicates with the expansion cavity, and a communicating hole is formed in the lower ejector rod; the equipment cabinet welding device is simple in structure, equipment cabinets of different specifications can be conveniently and fully fixed, it is guaranteed that the position of the equipment cabinet is stable in the welding process, the welding quality is prevented from being affected, welding fume generated in the welding process is cleaned, and pollution is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of laser welding, in particular to a laser welding device for processing electrical equipment. Background Art

[0002] Laser welding uses high-energy laser pulses to locally heat the material in a tiny area, melting the material into a specific molten pool without the need for flux. It welds thin-walled materials and precision parts through spot welding, butt welding, stack welding, and seal welding. During laser welding of electrical equipment cabinet housings, the electrical equipment cabinet housings need to be clamped and positioned.

[0003] At the same time, when laser welding is performed on the housing of the electrical equipment cabinet, the fixing effect of the electrical equipment cabinet is not good, and the housing of the electrical equipment cabinet is prone to displacement, which affects the accuracy of laser welding and causes reduced product quality. Moreover, after the welding of the electrical equipment cabinet is completed, the operation of disassembling the electrical equipment cabinet from the clamping and positioning mechanism is cumbersome, which will cause inconvenience to the staff. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, facilitate the full fixation of cabinets of different specifications, ensure the stable position of the cabinets during welding, avoid affecting the welding quality, and clean the welding smoke generated during welding to reduce pollution, the present invention proposes a laser welding device for electrical equipment processing.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: the laser welding device for processing electrical equipment described in the present invention comprises a bottom plate, the bottom plate is installed on a frame, a placement plate and a mechanical arm are installed on the bottom plate, a laser welding head is installed on the mechanical arm, conveyor belts for loading and unloading are arranged on both sides of the welding device, and guide rollers are installed at both ends of the placement plate along the X-axis direction; The placement plate is provided with a mounting hole, a lifting column is slidably mounted in the mounting hole, a mounting block is mounted on the upper end of the lifting column, and a ball bearing is mounted on the mounting block; The lifting column comprises an upper push rod and a lower push rod, the mounting block is located at the upper end of the upper push rod, a sliding groove is provided in the upper push rod, the upper end of the lower push rod is installed in the sliding groove, a buffer spring is installed between the upper end of the lower push rod and the top surface in the sliding groove, a mounting frame is installed at the lower end of the lower push rod, a motor is installed below the bottom plate, the motor drives the mounting frame to rise and fall through a screw rod, a retaining ring is installed at the lower end of the upper push rod, a limiting frame is installed below the bottom plate, the limiting frame is located between the retaining ring and the mounting frame, and the limiting frame supports the retaining ring; An elastic layer is installed on the side of the upper push rod, an expansion cavity is provided in the elastic layer, a vent hole is provided in the upper push rod, the vent hole and the expansion cavity are connected to each other, a connecting hole is provided in the lower push rod, the connecting hole and the vent hole are connected to each other through a slide groove, and the connecting hole is connected to an external air source; The lifting column first rises upward, then the expansion chamber expands, and then moves downward.

[0006] Preferably, a control cavity is provided in the upper push rod, a blocking ring is slidably installed in the control cavity, a blocking block is installed above the blocking ring, and the blocking ring and the blocking block cooperate with each other to form a one-way valve structure that conducts one-way flow from bottom to top; The blocking block is installed in the control cavity through a movable frame, an extrusion frame is installed on the blocking ring, a pressure rod is installed on the extrusion frame, the pressure rod is located in the vent hole above the control cavity, the upper end of the pressure rod is connected to the mounting block, and a deformation layer is installed between the mounting block and the upper push rod.

[0007] Preferably, the elastic layer is provided with a plurality of groups from top to bottom, a stepped protrusion is provided on the surface of the elastic layer, and the thickness of the side wall of the expansion cavity close to the upper part is smaller than the thickness of the side wall at the lower part.

[0008] Preferably, the heights of the lifting columns at both sides of the placement plate along the Y-axis direction are higher than those of the lifting columns at other positions.

[0009] Preferably, a slot is provided on the inner wall of the mounting hole, and the diameter of the slot is larger than the diameter of the elastic layer in the initial state.

[0010] Preferably, an elastic membrane is installed at the opening of the vent hole at the upper end of the upper push rod, the upper surface of the elastic membrane is in contact with the lower surface of the mounting block, the elastic membrane closes the opening of the vent hole, the upper end of the pressure rod abuts against the lower surface of the elastic membrane, and the cross-section of the elastic membrane is an upwardly raised arc.

[0011] Preferably, a centralizing groove is provided on the surface of the placement plate, the centralizing groove is located between the mounting holes, and the bottom surface of the centralizing groove close to one end in the negative direction of the X-axis is higher than the bottom surface of the other end; A collecting box is installed between the guide roller and the placing plate, and bristles are installed in the collecting box.

[0012] Preferably, a cleaning mechanism is installed on the laser welding head, and the cleaning mechanism includes a connecting ring, an air pipe and a contact pipe, the air pipe is connected to the contact pipe through the connecting ring, and the air pipe is connected to an external air source; The connecting ring comprises an air inlet ring and an air outlet ring, the air inlet ring is connected to an air inlet pipe and an air blowing pipe, and the air outlet ring is connected to an air outlet pipe and an air extraction pipe; The air blowing pipe and the air exhaust pipe are symmetrically distributed around the laser welding head. A plurality of evenly distributed groups of the air blowing pipe and the air exhaust pipe are arranged around the laser welding head. The air blowing pipe and the air exhaust pipe are made of flexible hoses.

[0013] The beneficial effects of the present invention are as follows: 1. The laser welding device for processing electrical equipment described in the present invention facilitates the movement of a cabinet onto the placement plate and the adjustment of the position of the cabinet on the placement plate by providing a placement plate, a lifting column, a ball bearing, and an elastic layer. Afterwards, the cabinet is fully fixed by the lifting column and the expanded elastic layer and is conveniently removed from the welding device after welding is completed, thereby preventing the cabinet from moving and affecting the quality of welding.

[0014] 2. The laser welding device for processing electrical equipment described in the present invention, by setting a control cavity, a pressure rod, a slot, a blocking block and a blocking ring, causes the elastic layer on the lifting column under the cabinet to expand and get stuck in the slot, thereby preventing the lifting column under the cabinet from rising and causing adverse effects on the fixation of the cabinet, thereby ensuring that the cabinet is fully fixed.

[0015] 3. The laser welding device for electrical equipment processing described in the present invention, by arranging an exhaust pipe and an air blow pipe, is convenient for forming a directional airflow, so as to collect the welding smoke generated during the welding process, and the elastic exhaust pipe and the air blow pipe can deform adaptively, and will not interfere with the movement and rotation of the laser welding head, thereby avoiding affecting the normal use of the welding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 is a three-dimensional diagram of the welding device of the present invention; Figure 2 is a cross-sectional view of the welding device of the present invention from a first viewing angle; Figure 3 is a cross-sectional view of the welding device of the present invention from a second viewing angle; Figure 4 is a cross-sectional view of a lifting column in the welding device of the present invention; Figure 5 It is a three-dimensional diagram of the mechanical arm and the laser welding head in the welding device of the present invention; Figure 6 It is a schematic diagram of the installation position of the welding device of the present invention and the conveyor belts at both ends thereof; Figure 7 yes Figure 1 A partial enlarged view of the middle part; Figure 8 yes Figure 2 A partial enlarged view of point B in the middle; Fig. 9 yes Figure 2A partial enlarged view of point C in the middle; Fig.10 yes Figure 3 A partial enlarged view of point D in the middle; Fig.11 yes Figure 4 A partial enlarged view of point E in the middle; Fig.12 yes Figure 4 A partial enlarged view of point F in the middle; Fig.13 yes Figure 4 A partial enlarged view of the G in the middle; Fig.14 yes Figure 5 A partial enlarged view of the H in the middle; In the figure: bottom plate 1, frame 11, guide roller 12, collecting box 13, brush 131, mounting frame 14, motor 141, limit frame 15, placement plate 2, central slot 21, card slot 22, lifting column 3, lower push rod 31, connecting hole 311, buffer spring 312, upper push rod 32, vent hole 321, slide groove 322, retaining ring 323, elastic membrane 324, control chamber 325, mounting block 33, deformation layer 331, ball 34, elastic layer 35, expansion chamber 351, stepped protrusion 352, pressure rod 36, extrusion frame 361, blocking ring 362, blocking block 363, movable frame 364, robotic arm 4, laser welding head 41, connecting ring 42, air inlet ring 421, air outlet ring 422, air pipe 43, inlet pipe 431, outlet pipe 432, contact pipe 44, air blowing pipe 441, exhaust pipe 442. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0019] like Figures 1 to 14 As shown, a laser welding device for processing electrical equipment according to the present invention comprises a base plate 1, the base plate 1 is mounted on a frame 11, a placement plate 2 and a mechanical arm 4 are mounted on the base plate 1, a laser welding head 41 is mounted on the mechanical arm 4, conveyor belts for loading and unloading are arranged on both sides of the welding device, and guide rollers 12 are installed at both ends of the placement plate 2 along the X-axis direction; The placing plate 2 is provided with a mounting hole, in which a lifting column 3 is slidably mounted, and a mounting block 33 is mounted on the upper end of the lifting column 3, and a ball bearing 34 is mounted on the mounting block 33; The lifting column 3 includes an upper push rod 32 and a lower push rod 31, the mounting block 33 is located at the upper end of the upper push rod 32, a slide groove 322 is provided in the upper push rod 32, the upper end of the lower push rod 31 is installed in the slide groove 322, a buffer spring 312 is installed between the upper end of the lower push rod 31 and the top surface in the slide groove 322, a mounting frame 14 is installed at the lower end of the lower push rod 31, a motor 141 is installed below the bottom plate 1, the motor 141 drives the mounting frame 14 to rise and fall through a screw rod, a retaining ring 323 is installed at the lower end of the upper push rod 32, an exhaust pipe 15 is installed below the bottom plate 1, the exhaust pipe 15 is located between the retaining ring 323 and the mounting frame 14, and the exhaust pipe 15 supports the retaining ring 323; An elastic layer 35 is installed on the side of the upper push rod 32, and an expansion cavity 351 is provided in the elastic layer 35. A vent hole 321 is provided in the upper push rod 32, and the vent hole 321 and the expansion cavity 351 are connected to each other. A connecting hole 311 is provided in the lower push rod 31, and the connecting hole 311 and the vent hole 321 are connected to each other through a slide groove 322, and the connecting hole 311 is connected to an external air source. The lifting column 3 first rises upward, then the expansion chamber 351 expands, and then moves downward; During operation, the staff moves the assembled cabinet to be welded upward onto the placement plate 2 through the conveyor belt and guide roller 12 at one end of the placement plate 2 close to the positive direction of the X-axis. After that, the staff adjusts the cabinet to a suitable position on the placement plate 2, and controls the motor 141 through the controller to drive the lifting column 3 to rise, so that the surrounding area of ​​the welded cabinet is covered with lifting columns 3, and the position of the cabinet is restricted and fixed by the lifting columns 3. After that, the controller controls the robot arm 4 to drive the laser welding head 41 to weld the gap on the cabinet to ensure the good welding quality of the cabinet. At the same time, after the cabinet welding is completed, the cabinet leaves the welding device from the conveyor belt at the other end of the placement plate 2. When the motor 141 is started, the lower push rod 31 is driven to rise through the mounting plate, the lower push rod 31 is slidably mounted in the slide groove 322 in the upper push rod 32, and a buffer spring 312 is installed in the slide groove 322, so that the lifting column 3 on the placement plate 2 below the cabinet to be welded is blocked, that is, the buffer spring 312 in this part of the lifting column 3 is compressed, and this part of the lifting column 3 will not be pushed up, causing displacement or skew of the cabinet to be welded, thereby avoiding affecting the restriction and fixation of the cabinet, and affecting the efficiency and quality of subsequent welding of the cabinet; At the same time, the lifting columns 3 distributed around the cabinet to be welded can fully limit and fix the cabinet, ensuring that the cabinet is well fixed during the welding process, avoiding displacement or shaking of the cabinet during the welding process, affecting the smooth progress of welding and the quality of cabinet welding. At the same time, after the cabinet is welded, it is relatively convenient to release the limit and fixation of the cabinet, and the operation is simple, thereby improving the work efficiency of the staff; At the same time, since the lifting columns 3 are evenly distributed on the placement plate 2, and the laser welding head 41 is located on the mechanical arm 4, there is a large adjustment space for the placement position of the cabinet to be welded on the placement plate 2, which is convenient for the placement, limiting and fixing of the cabinet, and improves the use range of the welding device; At the same time, after all the lifting columns 3 around the cabinet to be welded on the placement plate 2 are raised, the controller controls the external gas source to inflate the expansion cavity 351, so that the expansion cavity 351 expands, that is, the elastic layer 35 on the lifting columns 3 around the cabinet expands and abuts against the side of the cabinet, further fully fixing the cabinet, improving the effect of limiting and fixing the cabinet, and ensuring that the cabinet welding is carried out smoothly and the cabinet welding effect is good; At the same time, after the elastic layer 35 expands and abuts against the side of the cabinet, the controller will control the motor 141 to reverse, driving the already raised lifting column 3 to move downward or have a tendency to move downward, thereby using the friction between the elastic layer 35 and the side of the cabinet to generate a downward force on the cabinet, thereby avoiding a gap between the bottom surface of the cabinet and the surface of the placement plate 2, which affects the fixing effect of the cabinet; wherein, when the motor 141 reverses, the mounting frame 14 will drive the lower push rod 31 to move downward, at this time, the lifting column 3 located below the cabinet and not raised The elastic force of the buffer spring 312 is released, reducing the upward pushing force of the lifting column 3 under the cabinet on the cabinet, preventing the cabinet from being affected by this part of the lifting column 3 during the welding process, causing displacement in the Z-axis direction, affecting the welding quality of the cabinet and the safety of the welding device. At the same time, in the raised lifting column 3 around the cabinet, the buffer spring 312 will be stretched downward, so that the lifting column 3 around the cabinet and abutting against the side of the cabinet generates a downward force on the cabinet, further ensuring the limiting and fixing effect of the cabinet during the welding process; At the same time, when the cabinet to be welded moves on the placement plate 2, the bottom surface of the cabinet contacts the ball bearings 34, thereby facilitating the movement and position adjustment of the cabinet. In addition, the conveyor belt and guide rollers 12 arranged at both ends of the welding device in the X-axis direction can facilitate the staff to move the cabinet to be welded to the welding device, thereby improving the staff's operating efficiency and reducing the staff's workload.

[0020] As an embodiment of the present invention, a control chamber 325 is provided in the upper push rod 32, a blocking ring 362 is slidably installed in the control chamber 325, a blocking block 363 is installed above the blocking ring 362, and the blocking ring 362 and the blocking block 363 cooperate with each other to form a one-way valve structure that conducts one-way from bottom to top; The blocking block 363 is installed in the control cavity 325 through a movable frame 364, an extrusion frame 361 is installed on the blocking ring 362, a pressure rod 36 is installed on the extrusion frame 361, the pressure rod 36 is located in the vent hole 321 above the control cavity 325, the upper end of the pressure rod 36 is connected to the mounting block 33, and a deformation layer 331 is installed between the mounting block 33 and the upper push rod 32; When the cabinet to be welded is moved onto the placement plate 2, the lifting column 3 located below the cabinet to be welded will be squeezed by the cabinet. In this process, the deformation layer 331 between the mounting block 33 and the upper push rod 32 will be squeezed and deformed, so that the pressure rod 36 is squeezed downward, driving the blocking ring 362 in the control cavity 325 to move downward, thereby creating a gap between the blocking ring 362 and the blocking block 363, and releasing the unidirectional conductivity of the one-way valve structure formed between the blocking ring 362 and the blocking block 363. Similarly, the lifting column 3 located around the cabinet and not yet raised has no Due to the squeezing of the cabinet, the one-way valve structure formed between the blocking ring 362 and the blocking block 363 still has unidirectional conductivity. Therefore, when the controller controls the external gas source to inflate the expansion chamber 351, the gas will first enter the expansion chamber 351 in the lifting column 3 under the cabinet, so that the elastic layer 35 on the lifting column 3 under the cabinet is expanded, so that the part of the lifting column 3 is stuck in the installation hole, avoiding or reducing the possibility of the lifting column 3 under the cabinet being lifted up, and reducing the influence of the lifting column 3 under the cabinet on the fixing effect of the cabinet; At the same time, the motor 141 starts to start only after the external gas source starts to supply gas. Before the pressure of the external gas source is less than the opening pressure of the one-way valve structure in the lifting column 3 around the cabinet, the lifting column 3 around the cabinet has been driven to rise by the motor 141, thereby completing the limiting and fixing of the cabinet. At the same time, when the external gas source provides gas, the pressure of the gas will push the block 363 upward, creating a gap between the block 363 and the blocking ring 362, making it easier for the gas to enter the expansion chamber 351. Since the elastic force generated by the deformation layer 331 is smaller than the elastic force of the spring in the control chamber 325 used to control the movement of the block 363 and the air pressure in the control chamber 325, during the cabinet welding process, the external gas source will continue to provide air pressure to ensure that the expansion chamber 351 remains expanded and the cabinet is fixed. At the same time, after the cabinet welding is completed, when the external gas source stops providing air pressure, the gas pressure in the expansion chamber 351 will be greater than the elastic force provided by the deformation layer 331, thereby causing the blocking ring 362 to move downward and create a gap between the blocking ring 362 and the block 363, so that the expansion chamber 351 no longer expands and the elastic layer 35 returns to its original state, thereby releasing the fixation of the cabinet.

[0021] As an embodiment of the present invention, the elastic layer 35 is provided with multiple groups from top to bottom, and a stepped protrusion 352 is provided on the surface of the elastic layer 35, and the thickness of the side wall of the expansion cavity 351 near the top is smaller than the thickness of the side wall at the bottom; By providing a stepped protrusion 352 on the surface of the elastic layer 35, after the elastic layer 35 expands and contacts the side of the cabinet, the force between the elastic layer 35 and the side of the cabinet is relatively large, thereby preventing the cabinet and the elastic layer 35 from sliding, ensuring a good fixing effect on the cabinet, thereby preventing the cabinet from being displaced and affecting the welding quality of the cabinet; At the same time, since the thickness of the side wall of the expansion cavity 351 located at the top is relatively thin, the deformation of the elastic layer 35 near the top after expansion will be larger, so that the elastic layer 35 will exert a downward force on the side of the cabinet after expansion, thereby further increasing the restriction and fixing effect on the cabinet, ensuring the good welding quality of the cabinet. At the same time, since the thickness of the side wall below the expansion cavity 351 is relatively large, it can also avoid the side wall of the expansion cavity 351 being affected by burrs and protrusions when contacting the side of the cabinet, causing damage to the elastic layer 35 and affecting the normal use of the welding device.

[0022] As an embodiment of the present invention, the heights of the lifting columns 3 at both sides of the placement plate 2 along the Y-axis direction are higher than the lifting columns 3 at other positions; Since the height of the lifting columns 3 on both sides of the placement plate 2 near the Y-axis direction is relatively high, when the staff adjusts or moves the position of the cabinet on the placement plate 2, the cabinet will be affected by the higher lifting columns 3 on both sides of the Y-axis direction, increasing the resistance of the cabinet to move on both sides of the Y-axis direction, guiding and restricting the movement of the cabinet, that is, avoiding or reducing the possibility of the cabinet slipping out of the placement plate 2 or falling during the movement on the placement plate 2, thereby ensuring the normal welding and good cabinet welding quality.

[0023] As an embodiment of the present invention, a slot 22 is provided on the inner wall of the mounting hole, and the diameter of the slot 22 is larger than the diameter of the elastic layer 35 in the initial state; By providing a card slot 22 in the mounting hole, when the elastic layer 35 on the lifting column 3 below the cabinet begins to expand, the elastic layer 35 will be embedded in the card slot 22, thereby improving the effect of clamping and limiting the lifting column 3 below the cabinet, and avoiding the lifting column 3 below the cabinet being loosely clamped when only relying on the friction between the elastic layer 35 and the inner wall of the mounting hole for clamping and limiting, resulting in the lifting column 3 having a tendency to completely or partially rise upward, thereby affecting the fixing effect of the cabinet.

[0024] As an embodiment of the present invention, an elastic membrane 324 is installed at the opening of the vent hole 321 at the upper end of the upper push rod 32, the upper surface of the elastic membrane 324 is in contact with the lower surface of the mounting block 33, the elastic membrane 324 closes the opening of the vent hole 321, the upper end of the pressure rod 36 abuts against the lower surface of the elastic membrane 324, and the cross-section of the elastic membrane 324 is an arc shape that is pushed up. By installing an elastic membrane 324 at the opening of the vent hole 321, the vent hole 321 is relatively closed from the outside world, avoiding the occurrence of a gap between the pressure rod 36 and the vent hole 321 when the mounting block 33 squeezes the pressure block, resulting in gas leakage in the vent hole 321, thereby ensuring the stability of the pressure in the vent hole 321 and the expansion chamber 351, that is, ensuring the stability of the cabinet limit and fixation effect.

[0025] As an embodiment of the present invention, a centralizing groove 21 is provided on the surface of the placement plate 2, and the centralizing groove 21 is located between the mounting holes, and the bottom surface of the centralizing groove 21 close to one end of the negative direction of the X-axis is higher than the bottom surface of the other end; A collecting box 13 is installed between the guide roller 12 and the placing plate 2, and bristles 131 are installed in the collecting box 13; Since the components constituting the cabinet need to be cut from raw materials and the components need to be assembled and moved to the welding device, dust and impurities may exist on the surface of the cabinet to be welded. Therefore, a collection box 13 is installed between the guide roller 12 and the placement plate 2, and a brush 131 is installed on the collection box 13, so that when the cabinet to be welded changes its movement direction through the guide roller 12 and is transferred to the placement plate 2, the bottom surface of the cabinet will pass over the collection box 13, and the brush 131 will clean the bottom surface of the cabinet, thereby cleaning off the dust and impurities attached to the bottom surface of the cabinet, preventing the dust and impurities on the bottom surface of the cabinet from contaminating the surface of the placement plate 2 and affecting the lifting of the lifting column 3 and the rotation of the ball 34; At the same time, some particulate matter and welding smoke will be generated during the laser welding process. If these particulate matter and welding smoke cannot be fully collected, the remaining parts of the particulate matter and welding smoke will settle on the placement plate 2 and in the collecting tank 21. At this time, the surface of the placement plate 2 is cleaned, so that the settled particulate matter or welding smoke enters the collecting tank 21 and is then collected in the collecting box 13, thereby facilitating the cleaning of the surface of the placement plate 2.

[0026] As an embodiment of the present invention, a cleaning mechanism is installed on the laser welding head 41, and the cleaning mechanism includes a connecting ring 42, an air pipe 43 and a contact pipe 44. The air pipe 43 is connected to the contact pipe 44 through the connecting ring 42, and the air pipe 43 is connected to an external air source; The connecting ring 42 includes an air inlet ring 421 and an air outlet ring 422. The air inlet ring 421 is connected to an inlet pipe 431 and an air blowing pipe 441, and the air outlet ring 422 is connected to an outlet pipe 432 and an air extraction pipe 442. The air blowing pipe 441 and the air exhaust pipe 442 are symmetrically distributed around the laser welding head 41. Multiple groups of the air blowing pipe 441 and the air exhaust pipe 442 are evenly distributed around the laser welding head 41. The air blowing pipe 441 and the air exhaust pipe 442 are made of flexible hoses. When the laser welding head 41 welds the cabinet, the cleaning mechanism installed on the laser welding head 41 blows gas to the welding part through the air blowing pipe 441 and sucks gas from the welding part through the air exhaust pipe 442, thereby forming a relatively stable and directional airflow on both sides of the welding part, so as to facilitate the removal and cleaning of the particles and welding smoke generated by welding, and prevent the particles and welding smoke generated by welding from floating around at will, polluting the environment and damaging the health of the workers. At the same time, since the air blowing pipe 441 and the air exhaust pipe 442 are made of elastic hoses, when the robot arm 4 drives the laser welding head 41 to move and rotate, there is no need to consider too much about the interference of the cleaning mechanism on the displacement of the laser welding head 41, so that the laser welding head 41 can weld the position on the cabinet located in the angle or the gap between the components. In this process, the air blowing pipe 441 and the air exhaust pipe 442 will abut against the surface of the cabinet by themselves and deform adaptively, while ensuring the cleaning of the particles and welding smoke, without interfering with the movement and rotation of the laser welding head 41.

[0027] The specific workflow is as follows: The staff moves the assembled cabinet to be welded upward onto the placement plate 2 through the conveyor belt and guide roller 12 at one end of the placement plate 2 close to the positive direction of the X-axis. After that, the staff adjusts the cabinet to a suitable position on the placement plate 2, and controls the motor 141 through the controller to drive the lifting column 3 to rise, so that the surrounding area of ​​the welded cabinet is covered with lifting columns 3, and the position of the cabinet is restricted and fixed. After that, the controller controls the robot arm 4 to drive the laser welding head 41 to weld the gap on the cabinet. After welding is completed, the cabinet leaves the welding device from the conveyor belt at the other end of the placement plate 2. When the motor 141 is started, the lower push rod 31 is driven to rise through the mounting plate, the lower push rod 31 is slidably mounted in the slide groove 322 in the upper push rod 32, and a buffer spring 312 is installed in the slide groove 322, so that the lifting column 3 below the cabinet to be welded is blocked, that is, the buffer spring 312 in this part of the lifting column 3 is compressed, and this part of the lifting column 3 will not be pushed up; At the same time, since the lifting columns 3 are evenly distributed on the placement plate 2 and the laser welding head 41 is located on the robot arm 4, there is a large adjustment space for the placement position of the cabinet to be welded on the placement plate 2; At the same time, after all the lifting columns 3 on the placement plate 2 around the cabinet to be welded are raised, the controller controls the external air source to inflate the expansion cavity 351, so that the expansion cavity 351 expands, that is, the elastic layer 35 on the lifting columns 3 around the cabinet expands and abuts against the side of the cabinet; At the same time, after the elastic layer 35 expands and abuts against the side of the cabinet, the controller will control the motor 141 to reverse, driving the already raised lifting column 3 to move downward or have a tendency to move downward, thereby generating a downward force on the cabinet by means of the friction between the elastic layer 35 and the side of the cabinet; wherein, when the motor 141 reverses, the mounting frame 14 will drive the lower push rod 31 to move downward, at this time, the elastic force of the buffer spring 312 in the lifting column 3 that has not been raised and is located below the cabinet is released, reducing the upward pushing force of the lifting column 3 under the cabinet on the cabinet, and at the same time, in the already raised lifting column 3 located around the cabinet, the buffer spring 312 will be stretched downward, so that the lifting column 3 around the cabinet and abutting against the side of the cabinet generates a downward force on the cabinet; At the same time, when the cabinet to be welded moves on the placement plate 2, the bottom surface of the cabinet and the ball bearing 34 are in contact with each other, which facilitates the movement and position adjustment of the cabinet. In addition, the conveyor belt and guide roller 12 arranged at both ends of the welding device in the X-axis direction can facilitate the staff to move the cabinet to be welded onto the welding device. When the cabinet to be welded is moved onto the placement plate 2, the lifting column 3 located below the cabinet to be welded will be squeezed by the cabinet. During this process, the deformation layer 331 between the mounting block 33 and the upper push rod 32 will be squeezed and deformed, so that the pressure rod 36 is squeezed downward, driving the blocking ring 362 in the control chamber 325 to move downward, so that a gap is generated between the blocking ring 362 and the blocking block 363, and the one-way conductivity of the one-way valve structure formed between the blocking ring 362 and the blocking block 363 is released. Similarly, the lifting column 3 located around the cabinet and not yet raised is not squeezed by the cabinet, and the one-way conductivity of the one-way valve structure formed between the blocking ring 362 and the blocking block 363 still exists. Therefore, when the controller controls the external air source to inflate the expansion chamber 351, the gas will first enter the expansion chamber 351 in the lifting column 3 below the cabinet, so that the elastic layer 35 on the lifting column 3 below the cabinet is expanded, so that this part of the lifting column 3 is stuck in the mounting hole; At the same time, the motor 141 starts to start only after the external gas source starts to supply gas. Before the pressure of the external gas source is less than the opening pressure of the one-way valve structure in the lifting column 3 around the cabinet, the lifting column 3 around the cabinet has been driven to rise by the motor 141; At the same time, when the external gas source provides gas, the pressure of the gas will push the block 363 upward, so that a gap is generated between the block 363 and the blocking ring 362, so that the gas can enter the expansion cavity 351. At the same time, after the cabinet welding is completed, when the external gas source stops providing gas pressure, the gas pressure in the expansion cavity 351 will be greater than the elastic force provided by the deformation layer 331, so that the blocking ring 362 moves downward, and a gap is generated between the blocking ring 362 and the block 363, so that the expansion cavity 351 no longer expands, and the elastic layer 35 returns to its original state. By providing a stepped protrusion 352 on the surface of the elastic layer 35, after the elastic layer 35 expands and contacts the side of the cabinet, the force between the elastic layer 35 and the side of the cabinet is relatively large; At the same time, since the thickness of the side wall of the expansion cavity 351 located at the top is relatively thin, the deformation amount of the elastic layer 35 near the top after expansion is larger, so that the elastic layer 35 exerts a downward force on the side of the cabinet after expansion. At the same time, since the thickness of the side wall below the expansion cavity 351 is larger, it can also prevent the side wall of the expansion cavity 351 from being affected by burrs and protrusions when contacting the side of the cabinet, causing damage to the elastic layer 35. Since the height of the lifting columns 3 on both sides of the placement plate 2 near the Y-axis direction is relatively high, when the staff adjusts or moves the position of the cabinet on the placement plate 2, the cabinet will be affected by the higher lifting columns 3 on both sides of the Y-axis direction, increasing the resistance of the cabinet to move on both sides of the Y-axis direction, guiding and restricting the movement of the cabinet, that is, avoiding or reducing the possibility of the cabinet sliding outside the placement plate 2 or falling during the movement on the placement plate 2; By providing a card slot 22 in the mounting hole, when the elastic layer 35 on the lifting column 3 under the cabinet begins to expand, the elastic layer 35 will be embedded in the card slot 22, thereby improving the effect of clamping and limiting the lifting column 3 under the cabinet, and avoiding the lifting column 3 under the cabinet being loosely clamped when the lifting column 3 is clamped and limited only by the friction between the elastic layer 35 and the inner wall of the mounting hole, resulting in the lifting column 3 having a tendency to completely or partially rise upward; By installing an elastic membrane 324 at the opening of the vent hole 321, the vent hole 321 is relatively closed from the outside, so as to avoid a gap between the pressing rod 36 and the vent hole 321 when the mounting block 33 presses the pressing block, thereby preventing gas leakage in the vent hole 321; A collection box 13 is installed between the guide roller 12 and the placement plate 2, and a brush 131 is installed on the collection box 13, so that when the cabinet to be welded changes its movement direction through the guide roller 12 and is transferred to the placement plate 2, the bottom surface of the cabinet will pass over the collection box 13, and the brush 131 will clean the bottom surface of the cabinet to remove dust and impurities attached to the bottom surface of the cabinet; At the same time, some particles and welding smoke will be generated during the laser welding process. If these particles and welding smoke are not fully collected, the remaining part of the particles and welding smoke will settle on the placement plate 2 and the concentration tank 21. At this time, the surface of the placement plate 2 is cleaned to allow the settled particles or welding smoke to enter the concentration tank 21 and then be collected in the collection box 13. When the laser welding head 41 is welding the cabinet, the cleaning mechanism installed on the laser welding head 41 blows gas to the welding part through the air blowing pipe 441 and sucks gas from the welding part through the air exhaust pipe 442, thereby forming a relatively stable and directional airflow on both sides of the welding part, which is convenient for taking away and cleaning the particulate matter and welding smoke generated by welding. At the same time, since the air blowing pipe 441 and the air exhaust pipe 442 are made of elastic hoses, when the robot arm 4 drives the laser welding head 41 to move and rotate, the air blowing pipe 441 and the air exhaust pipe 442 will automatically abut against the surface of the cabinet and deform adaptively, while ensuring the cleaning of particulate matter and welding smoke, it will not interfere with the movement and rotation of the laser welding head 41.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A laser welding device for processing electrical equipment, comprising a base plate (1), the base plate (1) being mounted on a frame (11), a placement plate (2) and a mechanical arm (4) being mounted on the base plate (1), a laser welding head (41) being mounted on the mechanical arm (4), conveyor belts for loading and unloading materials being arranged on both sides of the welding device, and guide rollers (12) being mounted at both ends of the placement plate (2) along the X-axis direction; Features: The placement plate (2) is provided with a mounting hole, a lifting column (3) is slidably mounted in the mounting hole, a mounting block (33) is mounted on the upper end of the lifting column (3), and a ball bearing (34) is mounted on the mounting block (33); The lifting column (3) comprises an upper push rod (32) and a lower push rod (31); the mounting block (33) is located at the upper end of the upper push rod (32); a slide groove (322) is provided in the upper push rod (32); the upper end of the lower push rod (31) is mounted in the slide groove (322); a buffer spring (312) is installed between the upper end of the lower push rod (31) and the top surface in the slide groove (322); and a mounting spring (312) is installed at the lower end of the lower push rod (31). A mounting frame (14), a motor (141) is installed below the bottom plate (1), the motor (141) drives the mounting frame (14) to rise and fall through a screw rod, a retaining ring (323) is installed at the lower end of the upper push rod (32), a limiting frame (15) is installed below the bottom plate (1), the limiting frame (15) is located between the retaining ring (323) and the mounting frame (14), and the limiting frame (15) supports the retaining ring (323); An elastic layer (35) is installed on the side of the upper push rod (32), an expansion cavity (351) is provided in the elastic layer (35), a vent hole (321) is provided in the upper push rod (32), the vent hole (321) and the expansion cavity (351) are connected to each other, a connecting hole (311) is provided in the lower push rod (31), the connecting hole (311) and the vent hole (321) are connected to each other through a slide groove (322), and the connecting hole (311) is connected to an external air source; The lifting column (3) first rises upward, then the expansion chamber (351) expands, and then moves downward.

2. According to claim 1, a laser welding device for electrical equipment processing, characterized in that: A control chamber (325) is provided in the upper push rod (32), a blocking ring (362) is slidably installed in the control chamber (325), a blocking block (363) is installed above the blocking ring (362), and the blocking ring (362) and the blocking block (363) cooperate with each other to form a one-way valve structure that conducts one-way flow from bottom to top; The blocking block (363) is installed in the control cavity (325) through a movable frame (364), the blocking ring (362) is installed with an extrusion frame (361), the extrusion frame (361) is installed with a pressure rod (36), the pressure rod (36) is located in the vent hole (321) above the control cavity (325), the upper end of the pressure rod (36) is connected to the mounting block (33), and a deformation layer (331) is installed between the mounting block (33) and the upper push rod (32).

3. The laser welding device for electrical equipment processing according to claim 1, characterized in that: The elastic layer (35) is provided with multiple groups from top to bottom, a stepped protrusion (352) is provided on the surface of the elastic layer (35), and the thickness of the side wall of the expansion cavity (351) close to the upper side is smaller than the thickness of the side wall at the lower side.

4. The laser welding device for electrical equipment processing according to claim 1, characterized in that: The heights of the lifting columns (3) at both sides of the placement plate (2) along the Y-axis direction are higher than the lifting columns (3) at other positions.

5. The laser welding device for electrical equipment processing according to claim 2, characterized in that: A clamping groove (22) is provided on the inner wall of the mounting hole, and the diameter of the clamping groove (22) is larger than the diameter of the elastic layer (35) in the initial state.

6. The laser welding device for electrical equipment processing according to claim 2, characterized in that: An elastic membrane (324) is installed at the opening of the vent hole (321) at the upper end of the upper push rod (32), the upper surface of the elastic membrane (324) is in contact with the lower surface of the mounting block (33), and the elastic membrane (324) closes the opening of the vent hole (321). The upper end of the pressure rod (36) abuts against the lower surface of the elastic membrane (324), and the cross-section of the elastic membrane (324) is an arc shape that is pushed up.

7. The laser welding device for electrical equipment processing according to claim 1, characterized in that: A centralizing groove (21) is provided on the surface of the placement plate (2), the centralizing groove (21) is located between the mounting holes, and the bottom surface of the centralizing groove (21) close to one end in the negative direction of the X-axis is higher than the bottom surface of the other end; A collection box (13) is installed between the guide roller (12) and the placement plate (2), and bristles (131) are installed in the collection box (13).

8. The laser welding device for electrical equipment processing according to claim 1, characterized in that: The laser welding head (41) is provided with a cleaning mechanism, the cleaning mechanism comprising a connecting ring (42), an air pipe (43) and a contact pipe (44), the air pipe (43) being connected to the contact pipe (44) through the connecting ring (42), and the air pipe (43) being connected to an external air source; The connecting ring (42) comprises an air inlet ring (421) and an air outlet ring (422); the air inlet ring (421) is connected to an inlet pipe (431) and an air blowing pipe (441); and the air outlet ring (422) is connected to an outlet pipe (432) and an air extraction pipe (442); The air blowing pipe (441) and the air exhaust pipe (442) are symmetrically distributed around the laser welding head (41); a plurality of evenly distributed groups of the air blowing pipe (441) and the air exhaust pipe (442) are arranged around the laser welding head (41); and the air blowing pipe (441) and the air exhaust pipe (442) are made of flexible hoses.

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