Laser welding device with protection facility

Abstract

The invention discloses a laser welding device with a protection facility, and belongs to the technical field of laser welding, the laser welding device comprises a machine base, and a through hole is formed in the top of the machine base; the movable frame is slidably connected to the outer side of the machine base in a sleeving mode, driving motors are fixedly installed on the two sides of the machine base, and lead screws are fixedly connected to output shafts of the driving motors; the welding mechanism comprises a mounting frame, an electric push rod, a laser welding gun and a triggering mechanism, and the electric push rod is fixedly mounted at the top of the mounting frame; the thickness measuring mechanism comprises a support, two rotating wheels and two sliding frames, and the two sliding frames are connected to the bottom of the moving frame in a sliding and sleeving mode. Through the cooperation of the welding mechanism and the thickness measuring mechanism, the welding power and the feeding speed can be automatically adjusted in the welding process according to the thickness of the plates, the welding device adapts to welding work of the plates with different thicknesses, the welding temperature can be monitored, and accidents caused by overheating can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding, and in particular to a laser welding device with built-in protective facilities. Background Art

[0002] Laser welding is a process in which a high-power density laser beam is directly projected onto the surface of the material, causing the material to melt quickly and form a deep-penetrating weld. During the welding process, the temperature of the welding area is very high, but conventional laser welding devices cannot monitor the temperature of the welding area. Excessive temperature will cause the workpiece to deform, affecting the welding quality. Different welding powers and welding speeds are required when welding materials of different thicknesses. The current welding device cannot be automatically adjusted during the welding process, which will directly affect the welding quality. Therefore, we propose a laser welding device with built-in protection facilities to solve this problem. Summary of the invention

[0003] The purpose of the present invention is to provide a laser welding device with built-in protection facilities to solve the problems raised in the above background technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A laser welding device with built-in protection facilities, comprising: A machine base, wherein a through hole is formed on the top of the machine base; A moving frame, the moving frame is slidably sleeved on the outside of the machine base, and a driving motor is fixedly installed on both sides of the machine base, a screw rod is fixedly connected to the output shaft of the driving motor, and a screw rod is fixedly connected to the output shafts of the two driving motors, and the moving frame is threadedly sleeved on the outside of the two screw rods; A welding mechanism, the welding mechanism comprising a mounting frame, an electric push rod, a laser welding gun and a trigger mechanism, the electric push rod is fixedly mounted on the top of the mounting frame, and a U-shaped frame is fixedly connected to the output end of the electric push rod, infrared thermometers are fixedly mounted on both sides of the bottom of the U-shaped frame, and the laser welding gun is fixedly mounted in the U-shaped frame; The thickness measuring mechanism comprises: a bracket, two rotating wheels and two sliding frames, the two sliding frames are slidably sleeved on the bottom of the moving frame, and the two rotating wheels are rotatably installed on the inner walls on both sides of the bracket, and the front and rear sides of the sliding frame are rotatably connected with connecting rods, and the other end of the connecting rod is rotatably connected to the bracket.

[0005] Preferably, the trigger mechanism comprises two abutment wheels, two fixed conductive sheets and two movable conductive sheets, the two fixed conductive sheets are fixedly connected with a same conductive rod, and the conductive rod is fixedly installed in the mounting frame, the movable conductive sheet is arranged below the corresponding movable conductive sheet, and a concave disk is fixedly installed at the bottom of the movable conductive sheet; The interior of the abutment wheel is fixedly connected with a rotating shaft, and the two rotating shafts are rotatably connected to the inner walls of both sides of the mounting frame, and the other end of the rotating shaft is fixedly connected with a driving bevel gear, and the outer side of the driving bevel gear is meshed with a driven bevel gear, and the interior of the driven bevel gear is fixedly connected with a vertical shaft, and the top of the vertical shaft is fixedly connected with a rotating frame, and the outer side of the rotating frame is slidably sleeved with two counterweight plates, and the top of the counterweight plate is provided with a semicircular groove, and a ball is arranged in the semicircular groove, and the ball movably abuts against the bottom of the corresponding concave disk, and a compression spring is fixedly connected to one side of the counterweight plate, and the other end of the compression spring is fixedly connected to the corresponding rotating frame; A U-shaped rod and two horizontal plates are fixedly installed on both sides of the mounting frame. The horizontal plates are rotatably sleeved on the outside of the vertical axis, and a plurality of guide rods are fixedly connected to the top of the concave plate. The U-shaped rods are slidably sleeved on the outside of the corresponding guide rods.

[0006] Preferably, a first resistor bar is fixedly installed on the top of the movable frame, two first conductive tubes are slidably sleeved on the outer side of the first resistor bar, a connecting frame is fixedly connected to the bottom of the first conductive tube, the connecting frame is slidably sleeved on the outer side of the movable frame, and the front and rear sides of the connecting frame are rotatably connected with arc-shaped connecting rods, and the bottom end of the arc-shaped connecting rod is rotatably connected to the mounting frame; A second resistor bar is fixedly mounted on the inner wall of the bottom of the movable frame, a second conductive cylinder is slidably sleeved on the outer side of the second resistor bar, and the two sliding frames are respectively fixedly sleeved on the outer sides of the corresponding second conductive cylinders; A power supply and a controller are fixedly installed on the top of the base, and a control switch is arranged on the top of the controller. The control switch, the infrared thermometer and the controller are connected by signals. When the infrared thermometer detects that the temperature exceeds the safety threshold, the signal is transmitted to the controller, and the controller disconnects the control switch after receiving the signal. The positive pole of the power supply is electrically connected to one end of the control switch, the other end of the control switch is electrically connected to the positive pole of the drive motor on the right, the first resistor bar is electrically connected to one end of the second resistor bar, the other end of the second resistor bar and the movable conductive sheet on the right are electrically connected to the negative pole of the drive motor on the right, the movable conductive sheet on the left is electrically connected to the positive pole of the laser welding gun, the negative pole of the laser welding gun and the other end of the first resistor bar are electrically connected to the positive pole of the drive motor on the left, and the negative pole of the drive motor on the left is electrically connected to the negative pole of the power supply.

[0007] Preferably, a plurality of vertical rods are fixedly connected to the bottom of the bracket, and the movable frame is slidably sleeved on the outer sides of the vertical rods; The two sliding frames are fixedly connected with a return spring at one side away from each other, and the other end of the return spring is fixedly connected with the moving frame.

[0008] Preferably, slide rails are fixedly installed on both sides of the top of the machine base, and the slide rails are slidably sleeved with a plurality of clamping seats, an upper slide groove and a lower slide groove are opened on one side of the clamping seat, an upper slide plate and a lower slide plate are slidably connected in the upper slide groove and the lower slide groove respectively, an upper clamping plate and a lower clamping plate are fixedly installed on one side of the upper slide plate and the lower slide plate respectively, a first screw rod and a second screw rod are rotatably connected on the top of the clamping seat, the upper slide plate is threadedly sleeved on the outer side of the corresponding first screw rod, the lower slide plate is threadedly sleeved on the outer side of the second screw rod, and the top ends of the first screw rod and the second screw rod are fixedly installed on the first knob and the second knob respectively; A square groove is provided on the other side of the clamping seat, a square plate is slidably installed in the square groove, a clamping plate is fixedly installed at the bottom of the square plate, a plurality of clamping grooves are provided on both sides of the top of the base, the clamping plates are movably clamped in the corresponding clamping grooves, and a fastening spring and a pull ring are fixedly connected to the top of the square plate, and the top end of the fastening spring is fixedly connected to the top inner wall of the square groove; Limiting rods are fixedly installed in the upper sliding groove, the lower sliding groove and the square groove, and the upper sliding plate, the lower sliding plate and the square plate are respectively slidably sleeved on the outer sides of the corresponding limiting rods.

[0009] Preferably, T-shaped plates are fixedly mounted on both inner walls of the movable frame, T-shaped slots are provided on both sides of the base, and two T-shaped plates are slidably connected in corresponding T-shaped slots respectively; Guide rails are fixedly installed on both sides of the bottom of the machine base, and a guide seat is fixedly installed on the inner wall of the bottom of the movable frame. The guide seat is slidably sleeved on the outer side of the guide rails.

[0010] Preferably, two guide posts and two vertical springs are fixedly connected to the top of the mounting frame, the guide posts are slidably connected to the top of the moving frame, and the top ends of the vertical springs are fixedly connected to the top inner wall of the moving frame.

[0011] The beneficial effects of the present invention are: In the present invention, the laser welding device with self-protection facilities drives the square plate and the clamping plate to move upward by pulling the pull ring upward, so that the clamping plate is separated from the clamping slot and the fixation of the clamping seat is released, and then the front and rear positions of the clamping seat are adjusted according to the length of the plate to be welded. After the adjustment is completed, the pull ring is released, so that the square plate is reset downward under the elastic force of the tightening spring, and the clamping plate is re-engaged in the corresponding clamping slot to fix the clamping seat. Then, the two plates to be welded are pressed and placed between the upper clamping plate and the lower clamping plate, and then the first knob and the second knob are rotated to drive the first screw and the second screw to rotate. The first screw drives the upper clamping plate to move downward through the threaded transmission with the upper slide plate, and the second screw drives the lower clamping plate to move upward through the threaded transmission with the lower slide plate, thereby realizing the clamping of the plates, and making the top surfaces of the two plates flush, and making the abutting wheel and the rotating wheel abut against the top and bottom of the plates respectively; In the present invention, the laser welding device with self-protection facilities drives the U-shaped frame to move up and down by starting the electric push rod, so as to adjust the initial distance between the laser welding gun and the workpiece, and then the two driving motors are energized by closing the control switch, and the start-up drives the screw rod to rotate, and the screw rod drives the moving frame to move horizontally along the T-slot through the thread transmission of the moving frame, and the abutment wheel and the rotating wheel roll on the surface of the plate while the moving frame moves, and the abutment wheel rotates while the active bevel gear rotates through the rotating shaft, and the active bevel gear drives the vertical shaft and the rotating frame to rotate by meshing with the driven bevel gear, and the rotating frame drives the two counterweight plates to perform circular motion while the rotating frame rotates, and the counterweight plates move away from each other under the action of centrifugal force, and drive the ball bearings to move away from each other, and the ball bearings push the concave plate to move upward by abutting with the concave plate, and the concave plate drives the moving conductive sheet to move upward, so that the two moving conductive sheets contact the corresponding fixed conductive sheets, and the laser welding gun is energized to start working calmly, thereby realizing automatic welding of the plate; In the present invention, a laser welding device with self-protection facilities is described. During the welding process, when the laser welding gun moves to an area where the plate is thicker, the abutment wheel and the rotating wheel abut against each other, causing the abutment wheel to move upward and the rotating wheel to move downward, thereby the rotating wheel drives the mounting frame to move upward synchronously, so that the laser welding gun and the plate maintain a constant distance to perform welding work. At the same time, the mounting frame drives the two connecting frames away from each other through two arc-shaped connecting rods, and drives the two first conductive cylinders away from each other, so that the two first conductive cylinders gradually slide out from both ends of the first resistor bar, so that the length of the first resistor bar short-circuited by the first conductive cylinder becomes shorter, thereby increasing the resistance of the first resistor bar connected to the circuit, and at the same time the rotating wheel drives the bracket to move downward, and the bracket drives the two sliding frames away from each other through the connecting rod and compresses the compression spring, and the two sliding frames drive the two second conductive cylinders away from each other, so that the two second conductive cylinders It gradually slides out from both ends of the second resistor bar, so that the length of the second resistor bar short-circuited by the second conductive tube becomes shorter, thereby increasing the resistance of the second resistor bar connected to the circuit, thereby increasing the resistance of the first resistor bar and the second resistor bar in series, thereby increasing the overall resistance formed by the first resistor bar and the second resistor bar being connected in series and connected in parallel with the laser welding gun, and increasing the divided voltage, thereby increasing the voltage and power of the laser welding gun, so that welding of thicker plates can be achieved, and at the same time, the voltage divided by the two drive motors will be reduced, and the power of the drive motors will be reduced, thereby reducing the rotation speed of the screw rod, thereby reducing the forward and backward movement feed speed of the moving frame and the laser welding gun, so as to ensure the welding effect of thicker plates, on the contrary, when the laser welding gun moves to an area with thinner plate thickness, the power of the laser welding gun is reduced and the feed speed is increased, thereby avoiding overheating and deformation of the plate and improving welding efficiency; In the present invention, the laser welding device with self-contained protection facilities, when the plate shakes or deforms during welding, causing the top of the plate to be uneven, the two abutment wheels cannot contact the plate at the same time, so that one of the abutment wheels stops rotating, so that the corresponding moving conductive sheet moves downward under the action of gravity and is out of contact with the corresponding fixed conductive sheet, so that the laser welding gun is powered off, thereby avoiding welding errors; In the present invention, the laser welding device with self-protection facilities monitors the temperature of the welding area through an infrared thermometer during the welding process. When it is found that the temperature is too high, a signal is transmitted to the controller and the control switch is disconnected, so that the drive motor and the laser welding gun are powered off, thereby avoiding accidents. In the present invention, the laser welding device with self-contained protection facilities can automatically adjust the welding power and feed speed according to the thickness of the plate during the welding process through the cooperation of the welding mechanism and the thickness measuring mechanism, adapt to the welding work of plates of different thicknesses, and monitor the welding temperature to avoid accidents caused by overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the three-dimensional structure of a laser welding device with built-in protection facilities proposed by the present invention; Figure 2 A schematic diagram of the three-dimensional structure of a laser welding device with self-protection facilities proposed by the present invention from another perspective; Figure 3 This is a bottom-up stereoscopic structural schematic diagram of a laser welding device with self-protection facilities proposed by the present invention; Figure 4 This is a schematic cross-sectional view of a laser welding device with built-in protection facilities proposed by the present invention; Figure 5 for Figure 4 A partial enlarged view of part A; Figure 6 for Figure 4 A partial enlarged view of part B; Figure 7 for Figure 4 A partial enlarged view of part C in the middle; Figure 8 A partial three-dimensional structural schematic diagram of a laser welding device with self-protection facilities proposed by the present invention; Fig. 9 for Figure 8 A partial enlarged view of the Fig.10 A three-dimensional structural schematic diagram of the welding mechanism proposed by the present invention; Fig.11 It is a schematic diagram of a partial three-dimensional structure of the welding mechanism proposed by the present invention; Fig.12 It is a cross-sectional structural schematic diagram of the welding mechanism proposed by the present invention; Fig.13 for Fig.12 A partial enlarged view of part D in FIG. Fig.14 This is a schematic diagram of the three-dimensional structure of the clamping seat proposed by the present invention; Fig.15 This is a schematic cross-sectional structural diagram of the clamping seat proposed by the present invention; Fig.16 The present invention provides a circuit diagram of a laser welding device with built-in protection facilities.

[0013] In the figure: 1, base; 101, slide rail; 102, guide rail; 103, slot; 2, clamping seat; 201, upper clamping plate; 202, lower clamping plate; 203, upper slide plate; 204, lower slide plate; 205, first screw rod; 206, second screw rod; 207, first knob; 208, second knob; 209, square plate; 210, fastening spring; 211, pull ring; 212, clamping plate; 3, moving frame; 301, T-plate; 302, guide seat; 303, screw rod; 304, driving motor; 4, mounting frame; 401, vertical spring; 402, electric push rod; 5, abutment wheel; 501, rotating shaft; 502, driving bevel gear; 503, driven bevel gear; 504, Vertical axis; 505, horizontal plate; 506, rotating frame; 507, counterweight plate; 508, compression spring; 509, ball bearing; 510, concave plate; 511, guide rod; 512, U-shaped rod; 513, fixed conductive sheet; 514, movable conductive sheet; 515, conductive rod; 6, laser welding gun; 601, U-shaped frame; 602, infrared thermometer; 7, first resistor bar; 701, first conductive tube; 702, connecting frame; 703, arc connecting rod; 8, bracket; 801, rotating wheel; 802, vertical rod; 803, connecting rod; 9, second resistor bar; 901, second conductive tube; 902, sliding frame; 903, reset spring; 10, power supply; 11, controller; 12, control switch. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0015] Reference Figure 1 - Fig.16 , a laser welding device with self-contained protection facilities, comprising: A machine base 1, wherein a through hole is formed on the top of the machine base 1; The moving frame 3 is slidably sleeved on the outside of the machine base 1, and driving motors 304 are fixedly installed on both sides of the machine base 1, and the output shaft of the driving motor 304 is fixedly connected with a screw rod 303, and the output shafts of the two driving motors 304 are fixedly connected with the screw rods 303, and the moving frame 3 is threadedly sleeved on the outside of the two screw rods 303; The welding mechanism includes a mounting frame 4, an electric push rod 402, a laser welding gun 6 and a trigger mechanism. The electric push rod 402 is fixedly mounted on the top of the mounting frame 4, and a U-shaped frame 601 is fixedly connected to the output end of the electric push rod 402. Infrared thermometers 602 are fixedly mounted on both sides of the bottom of the U-shaped frame 601, and the laser welding gun 6 is fixedly mounted in the U-shaped frame 601; The thickness measuring mechanism includes: a bracket 8, two rotating wheels 801 and two sliding frames 902. The two sliding frames 902 are slidably sleeved on the bottom of the moving frame 3, and the two rotating wheels 801 are rotatably installed on the inner walls of both sides of the bracket 8, and the front and rear sides of the sliding frame 902 are rotatably connected with a connecting rod 803, and the other end of the connecting rod 803 is rotatably connected to the bracket 8.

[0016] In this embodiment, the trigger mechanism includes two abutment wheels 5, two fixed conductive sheets 513 and two movable conductive sheets 514. The two fixed conductive sheets 513 are fixedly connected with a conductive rod 515, and the conductive rod 515 is fixedly installed in the mounting frame 4. The movable conductive sheets 514 are arranged below the corresponding movable conductive sheets 514, and a concave plate 510 is fixedly installed at the bottom of the movable conductive sheets 514. The bottom of the concave plate 510 is concave in the middle and convex at the periphery. A rotating shaft 501 is fixedly connected inside the abutting wheel 5, and the two rotating shafts 501 are rotatably connected to the inner walls on both sides of the mounting frame 4, and the other end of the rotating shaft 501 is fixedly connected to a driving bevel gear 502, and a driven bevel gear 503 is meshed on the outer side of the driving bevel gear 502. A vertical shaft 504 is fixedly connected inside the driven bevel gear 503, and a rotating frame 506 is fixedly connected to the top of the vertical shaft 504. Two counterweight plates 507 are slidably sleeved on the outer side of the rotating frame 506. A semicircular groove is opened on the top of the counterweight plate 507, and a ball 509 is arranged in the semicircular groove. The ball 509 movably abuts against the bottom of the corresponding concave plate 510, and a compression spring 508 is fixedly connected to one side of the counterweight plate 507, and the other end of the compression spring 508 is fixedly connected to the corresponding rotating frame 506. U-shaped rods 512 and two horizontal plates 505 are fixedly installed on both sides of the mounting frame 4. The horizontal plates 505 are rotatably sleeved on the outside of the vertical shaft 504, and a plurality of guide rods 511 are fixedly connected to the top of the concave plate 510. The U-shaped rods 512 are slidably sleeved on the outside of the corresponding guide rods 511.

[0017] In this embodiment, a first resistor bar 7 is fixedly installed on the top of the moving frame 3, two first conductive tubes 701 are slidably sleeved on the outer side of the first resistor bar 7, a connecting frame 702 is fixedly connected to the bottom of the first conductive tube 701, the connecting frame 702 is slidably sleeved on the outer side of the moving frame 3, and the front and rear sides of the connecting frame 702 are rotatably connected to arc-shaped connecting rods 703, and the bottom end of the arc-shaped connecting rod 703 is rotatably connected to the mounting frame 4; A second resistor bar 9 is fixedly mounted on the inner wall of the bottom of the moving frame 3, a second conductive tube 901 is slidably sleeved on the outer side of the second resistor bar 9, and two sliding frames 902 are respectively fixedly sleeved on the outer sides of the corresponding second conductive tubes 901; It should be noted that the first conductive tube 701 and the second conductive tube 901 are both made of copper. Due to the excellent conductivity of copper, the areas where the first resistor strip 7 and the second resistor strip 9 contact the first conductive tube 701 and the second conductive tube 901 are short-circuited. A power supply 10 and a controller 11 are fixedly installed on the top of the base 1. A control switch 12 is arranged on the top of the controller 11. The control switch 12 and the infrared thermometer 602 are connected to the controller 11 by signals. When the infrared thermometer 602 detects that the temperature exceeds the safety threshold, the signal is transmitted to the controller 11. After receiving the signal, the controller 11 disconnects the control switch 12. The positive pole of the power supply 10 is electrically connected to one end of the control switch 12, the other end of the control switch 12 is electrically connected to the positive pole of the drive motor 304 on the right, the first resistor bar 7 and one end of the second resistor bar 9 are electrically connected, the other end of the second resistor bar 9 and the movable conductive sheet 514 on the right are electrically connected to the negative pole of the drive motor 304 on the right, the movable conductive sheet 514 on the left is electrically connected to the positive pole of the laser welding gun 6, the negative pole of the laser welding gun 6 and the other end of the first resistor bar 7 are electrically connected to the positive pole of the drive motor 304 on the left, and the negative pole of the drive motor 304 on the left is electrically connected to the negative pole of the power supply 10.

[0018] In this embodiment, a plurality of vertical rods 802 are fixedly connected to the bottom of the bracket 8, and the moving frame 3 is slidably sleeved on the outer side of the vertical rods 802, so as to guide the bracket 8 to move vertically; A return spring 903 is fixedly connected to the side of the two sliding frames 902 that are away from each other, and the other end of the return spring 903 is fixedly connected to the moving frame 3, so as to reset the sliding frames 902.

[0019] In this embodiment, slide rails 101 are fixedly installed on both sides of the top of the machine base 1, and a plurality of clamping seats 2 are slidably sleeved on the slide rails 101. An upper slide groove and a lower slide groove are opened on one side of the clamping seat 2. An upper slide plate 203 and a lower slide plate 204 are slidably connected in the upper slide groove and the lower slide groove, respectively. An upper clamping plate 201 and a lower clamping plate 202 are fixedly installed on one side of the upper slide plate 203 and the lower slide plate 204, respectively. A first screw rod 205 and a second screw rod 206 are rotatably connected on the top of the clamping seat 2. The upper slide plate 203 is threadedly sleeved on the outer side of the corresponding first screw rod 205, and the lower slide plate 204 is threadedly sleeved on the outer side of the second screw rod 206. The top ends of the first screw rod 205 and the second screw rod 206 are fixedly installed on the first knob 207 and the second knob 208, respectively. A square groove is provided on the other side of the clamping seat 2, a square plate 209 is slidably installed in the square groove, a clamping plate 212 is fixedly installed at the bottom of the square plate 209, a plurality of clamping grooves 103 are provided on both sides of the top of the base 1, the clamping plate 212 is movably clamped in the corresponding clamping grooves 103, and a fastening spring 210 and a pull ring 211 are fixedly connected to the top of the square plate 209, and the top end of the fastening spring 210 is fixedly connected to the top inner wall of the square groove; Limit rods are fixedly installed in the upper slide groove, the lower slide groove and the square groove, and the upper slide plate 203, the lower slide plate 204 and the square plate 209 are respectively slidably sleeved on the outer sides of the corresponding limit rods, thereby guiding the upper slide plate 203, the lower slide plate 204 and the square plate 209 to move up and down.

[0020] In this embodiment, T-shaped plates 301 are fixedly installed on the inner walls of both sides of the moving frame 3, and T-shaped slots are opened on both sides of the base 1. The two T-shaped plates 301 are slidably connected in the corresponding T-shaped slots respectively; Guide rails 102 are fixedly installed on both sides of the bottom of the machine base 1 , and guide seats 302 are fixedly installed on the inner wall of the bottom of the moving frame 3 . The guide seats 302 are slidably sleeved on the outer sides of the guide rails 102 .

[0021] In this embodiment, two guide posts and two vertical springs 401 are fixedly connected to the top of the mounting frame 4, the guide posts are slidably connected to the top of the moving frame 3, and the top ends of the vertical springs 401 are fixedly connected to the top inner wall of the moving frame 3, so as to reset the mounting frame 4 so that the abutting wheel 5 keeps in contact with the workpiece; In this embodiment, when in use, the square plate 209 and the clamping plate 212 are driven upward by pulling the pull ring 211 upward, so that the clamping plate 212 is separated from the clamping groove 103, and the clamping seat 2 is released. Then, the front and rear positions of the clamping seat 2 are adjusted according to the length of the plate to be welded. After the adjustment is completed, the pull ring 211 is released, so that the square plate 209 is reset downward under the elastic force of the fastening spring 210, and the clamping plate 212 is re-engaged in the corresponding clamping groove 103 to fix the clamping seat 2. Then, the two plates to be welded are pressed together. Place it between the upper clamping plate 201 and the lower clamping plate 202, then rotate the first knob 207 and the second knob 208, thereby driving the first screw 205 and the second screw 206 to rotate, the first screw 205 drives the upper clamping plate 201 to move downward through the thread transmission with the upper slide plate 203, and the second screw 206 drives the lower clamping plate 202 to move upward through the thread transmission with the lower slide plate 204, thereby clamping the plate, and making the top surfaces of the two plates flush, and making the abutment wheel 5 and the rotating wheel 801 abut against the top and bottom of the plate respectively; The U-shaped frame 601 is driven up and down by starting the electric push rod 402, so as to adjust the initial distance between the laser welding gun 6 and the workpiece. Then, the control switch 12 is closed to power on the two driving motors 304, and the screw rod 303 is driven to rotate. The screw rod 303 drives the moving frame 3 to move horizontally along the T-slot through the thread transmission of the moving frame 3, and the abutting wheel 5 and the rotating wheel 801 roll on the surface of the plate while the moving frame 3 moves. When the abutting wheel 5 rotates, the active bevel gear 502 is driven to rotate through the rotating shaft 501. The active bevel gear 502 rotates with the driven bevel gear 502. The meshing of the bevel gear 503 drives the vertical shaft 504 and the rotating frame 506 to rotate. The rotating frame 506 drives the two counterweight plates 507 to perform circular motion while rotating. The counterweight plates 507 move away from each other under the action of centrifugal force, and drive the balls 509 to move away from each other. The balls 509 push the concave plate 510 to move upward by contacting with the concave plate 510. The concave plate 510 drives the movable conductive sheet 514 to move upward, so that the two movable conductive sheets 514 contact with the corresponding fixed conductive sheets 513, so that the laser welding gun 6 is powered on and starts working, thereby realizing automatic welding of the plate. During the welding process, when the laser welding gun 6 moves to the area where the plate is thicker, the plate abuts against the abutting wheel 5 and the rotating wheel 801, causing the abutting wheel 5 to move upward and the rotating wheel 801 to move downward, so that the rotating wheel 801 drives the mounting frame 4 to move upward synchronously, so that the laser welding gun 6 and the plate maintain a constant distance for welding. At the same time, the mounting frame 4 drives the two connecting frames 702 away from each other through the two arc-shaped connecting rods 703, and drives the two first conductive cylinders 701 away from each other, so that the two first conductive cylinders 701 gradually slide out from the two ends of the first resistor bar 7, so that the length of the first resistor bar 7 short-circuited by the first conductive cylinder 701 becomes shorter, so that the resistance of the first resistor bar 7 connected to the circuit increases, and at the same time, the rotating wheel 801 drives the bracket 8 to move downward, and the bracket 8 drives the two sliding frames 902 away from each other through the connecting rod 803 and compresses the compression spring 508, and the two sliding frames 902 drive the two second conductive cylinders 901 away from each other, so that the two second conductive cylinders 901 The cylinder 901 gradually slides out from both ends of the second resistor bar 9, so that the length of the second resistor bar 9 short-circuited by the second conductive cylinder 901 becomes shorter, thereby increasing the resistance of the second resistor bar 9 connected to the circuit, thereby increasing the resistance of the first resistor bar 7 and the second resistor bar 9 in series, thereby increasing the overall resistance formed by the first resistor bar 7 and the second resistor bar 9 connected in series and in parallel with the laser welding gun 6, and increasing the voltage obtained, thereby increasing the voltage and power of the laser welding gun 6, so that welding of thicker plates can be achieved, and at the same time, the voltage obtained by the two drive motors 304 is reduced, and the power of the drive motor 304 is reduced, thereby reducing the rotation speed of the screw rod 303, thereby reducing the forward and backward movement feed speed of the moving frame 3 and the laser welding gun 6, so as to ensure the welding effect of thicker plates, on the contrary, when the laser welding gun 6 moves to an area with thinner plate thickness, the power of the laser welding gun 6 is reduced and the feed speed is increased, thereby avoiding overheating and deformation of the plate and improving welding efficiency; When the plate shakes or deforms during welding, causing the top of the plate to be uneven, the two abutting wheels 5 cannot contact the plate at the same time, causing one of the abutting wheels 5 to stop rotating, thereby causing the corresponding movable conductive sheet 514 to move downward under the action of gravity and to be out of contact with the corresponding fixed conductive sheet 513, thereby cutting off the power supply to the laser welding gun 6, thereby avoiding welding errors. During the welding process, the temperature of the welding area is monitored by the infrared thermometer 602. When the temperature is found to be too high, a signal is transmitted to the controller 11, and the control switch 12 is disconnected, so that the drive motor 304 and the laser welding gun 6 are powered off, thereby avoiding accidents.

[0022] The above is a detailed introduction to a laser welding device with self-contained protection facilities provided by the present invention. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A laser welding device with built-in protective facilities, characterized in that: include: A machine base (1), wherein a through hole is formed on the top of the machine base (1); A moving frame (3), the moving frame (3) being slidably sleeved on the outside of the machine base (1), and drive motors (304) being fixedly mounted on both sides of the machine base (1), a screw rod (303) being fixedly connected to the output shaft of the drive motor (304), and screw rods (303) being fixedly connected to the output shafts of the two drive motors (304), and the moving frame (3) being threadedly sleeved on the outsides of the two screw rods (303); A welding mechanism, the welding mechanism comprising a mounting frame (4), an electric push rod (402), a laser welding gun (6) and a trigger mechanism, the electric push rod (402) being fixedly mounted on the top of the mounting frame (4), and a U-shaped frame (601) being fixedly connected to the output end of the electric push rod (402), infrared thermometers (602) being fixedly mounted on both sides of the bottom of the U-shaped frame (601), and the laser welding gun (6) being fixedly mounted inside the U-shaped frame (601); A thickness measuring mechanism, the thickness measuring mechanism comprising: a bracket (8), two rotating wheels (801) and two sliding frames (902), the two sliding frames (902) being slidably sleeved on the bottom of the moving frame (3), and the two rotating wheels (801) being rotatably mounted on the inner walls of both sides of the bracket (8), and the front and rear sides of the sliding frames (902) are both rotatably connected to connecting rods (803), and the other end of the connecting rod (803) is rotatably connected to the bracket (8).

2. A laser welding device with self-contained protection facilities according to claim 1, characterized in that: The trigger mechanism comprises two abutment wheels (5), two fixed conductive sheets (513) and two movable conductive sheets (514); a conductive rod (515) is fixedly connected between the two fixed conductive sheets (513), and the conductive rod (515) is fixedly mounted in the mounting frame (4); the movable conductive sheets (514) are arranged below the corresponding movable conductive sheets (514), and a concave disk (510) is fixedly mounted at the bottom of the movable conductive sheets (514); The abutment wheel (5) is fixedly connected to a rotating shaft (501) inside, and the two rotating shafts (501) are rotatably connected to the inner walls on both sides of the mounting frame (4), and the other end of the rotating shaft (501) is fixedly connected to a driving bevel gear (502), and the outer side of the driving bevel gear (502) is meshed with a driven bevel gear (503), and the interior of the driven bevel gear (503) is fixedly connected to a vertical shaft (504), and the top end of the vertical shaft (504) is fixedly connected to A rotating frame (506), wherein two counterweight plates (507) are slidably sleeved on the outer side of the rotating frame (506), a semicircular groove is provided on the top of the counterweight plate (507), a ball (509) is arranged in the semicircular groove, and the ball (509) is movably abutted against the bottom of the corresponding concave plate (510), and a compression spring (508) is fixedly connected to one side of the counterweight plate (507), and the other end of the compression spring (508) is fixedly connected to the corresponding rotating frame (506); U-shaped rods (512) and two horizontal plates (505) are fixedly mounted on both sides of the mounting frame (4), the horizontal plates (505) are rotatably sleeved on the outside of the vertical shaft (504), and a plurality of guide rods (511) are fixedly connected to the top of the concave plate (510), and the U-shaped rods (512) are slidably sleeved on the outside of the corresponding guide rods (511).

3. The laser welding device with self-contained protection facilities according to claim 1, characterized in that: A first resistor bar (7) is fixedly mounted on the top of the movable frame (3); two first conductive tubes (701) are slidably sleeved on the outer side of the first resistor bar (7); a connecting frame (702) is fixedly connected to the bottom of the first conductive tube (701); the connecting frame (702) is slidably sleeved on the outer side of the movable frame (3); and arc-shaped connecting rods (703) are rotatably connected to the front and rear sides of the connecting frame (702); and the bottom end of the arc-shaped connecting rod (703) is rotatably connected to the mounting frame (4); A second resistor bar (9) is fixedly mounted on the inner wall of the bottom of the movable frame (3); a second conductive tube (901) is slidably sleeved on the outer side of the second resistor bar (9); and the two sliding frames (902) are respectively fixedly sleeved on the outer sides of the corresponding second conductive tubes (901); A power source (10) and a controller (11) are fixedly mounted on the top of the base (1); a control switch (12) is arranged on the top of the controller (11); the control switch (12), the infrared thermometer (602) and the controller (11) are connected by signal; when the infrared thermometer (602) detects that the temperature exceeds a safety threshold, the signal is transmitted to the controller (11); and after receiving the signal, the controller (11) disconnects the control switch (12); The positive electrode of the power supply (10) is electrically connected to one end of the control switch (12), the other end of the control switch (12) is electrically connected to the positive electrode of the right drive motor (304), the first resistor bar (7) is electrically connected to one end of the second resistor bar (9), the other end of the second resistor bar (9) and the right movable conductive sheet (514) are electrically connected to the negative electrode of the right drive motor (304), the left movable conductive sheet (514) is electrically connected to the positive electrode of the laser welding gun (6), the negative electrode of the laser welding gun (6) and the other end of the first resistor bar (7) are electrically connected to the positive electrode of the left drive motor (304), and the negative electrode of the left drive motor (304) is electrically connected to the negative electrode of the power supply (10).

4. The laser welding device with self-contained protection facilities according to claim 1, characterized in that: A return spring (903) is fixedly connected to one side of the two sliding frames (902) that is away from each other, and the other end of the return spring (903) is fixedly connected to the moving frame (3).

5. The laser welding device with self-contained protection facilities according to claim 1, characterized in that: Slide rails (101) are fixedly installed on both sides of the top of the machine base (1), and the slide rails (101) are slidably sleeved with a plurality of clamping seats (2). An upper slide groove and a lower slide groove are opened on one side of the clamping seat (2), and an upper slide plate (203) and a lower slide plate (204) are slidably connected in the upper slide groove and the lower slide groove, respectively. An upper clamping plate (201) and a lower clamping plate (202) are fixedly installed on one side of the upper slide plate (203) and the lower slide plate (204), respectively. A first screw rod (205) and a second screw rod (206) are rotatably connected at the top of the clamping seat (2), and the upper slide plate (203) is threadedly sleeved on the outer side of the corresponding first screw rod (205), and the lower slide plate (204) is threadedly sleeved on the outer side of the second screw rod (206), and the top ends of the first screw rod (205) and the second screw rod (206) are fixedly installed on the first knob (207) and the second knob (208), respectively. A square groove is provided on the other side of the clamping seat (2), a square plate (209) is slidably installed in the square groove, a clamping plate (212) is fixedly installed at the bottom of the square plate (209), a plurality of clamping grooves (103) are provided on both sides of the top of the machine base (1), the clamping plate (212) is movably clamped in the corresponding clamping grooves (103), and a fastening spring (210) and a pull ring (211) are fixedly connected to the top of the square plate (209), and the top end of the fastening spring (210) is fixedly connected to the top inner wall of the square groove; Limit rods are fixedly installed in the upper slide groove, the lower slide groove and the square groove, and the upper slide plate (203), the lower slide plate (204) and the square plate (209) are respectively slidably sleeved on the outer sides of the corresponding limit rods.

6. The laser welding device with self-contained protection facilities according to claim 1, characterized in that: T-shaped plates (301) are fixedly mounted on both inner walls of the movable frame (3), and T-shaped slots are provided on both sides of the machine base (1), and the two T-shaped plates (301) are slidably connected in the corresponding T-shaped slots respectively; Guide rails (102) are fixedly mounted on both sides of the bottom of the machine base (1), and a guide seat (302) is fixedly mounted on the inner wall of the bottom of the movable frame (3), and the guide seat (302) is slidably sleeved on the outer side of the guide rails (102).

7. The laser welding device with self-contained protection facilities according to claim 1, characterized in that: Two guide columns and two vertical springs (401) are fixedly connected to the top of the mounting frame (4), the guide columns are slidably connected to the top of the moving frame (3), and the top ends of the vertical springs (401) are fixedly connected to the top inner wall of the moving frame (3).

8. The laser welding device with self-contained protection facilities according to claim 1, characterized in that: A plurality of vertical rods (802) are fixedly mounted on the bottom of the bracket (8), and the vertical rods (802) are slidably connected to the bottom of the moving frame (3).

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