Laser welding device for aluminum alloy material for automobile

Abstract

The invention discloses an automobile aluminum alloy material laser welding device which comprises a box body, a button, a handle and a laser welding gun, the top end of the handle is installed on the right side of the lower surface of the box body, the button is embedded in the top of the upper surface of the handle, the box body is moved when the handle is held by hand, and the button is electrically connected with the laser welding gun. The button controls starting and stopping of the laser welding gun, the widening mechanism is installed in an inner cavity of the box body, the buffering mechanism is installed at the rear end of the widening mechanism, the supporting frame is installed at the rear end of the buffering mechanism, and the laser welding gun is installed on the inner side of the supporting frame. The problem that welding is broken due to too large pressure or welding is not firm due to too small pressure is effectively solved, the requirement for the proficiency degree of operators is lowered, both green hands and technicians can stably work, the consistency of welding quality is remarkably improved, irregularity of manual operation is thoroughly eradicated through mechanical linkage, and the production efficiency is improved. And the risks of low welding precision and wrong welding and missing welding are effectively avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of automobile repair welding, in particular to a laser welding device for aluminum alloy materials for automobiles. BACKGROUND

[0002] Aluminum alloys are increasingly widely applied in the automobile industry due to their light weight and high strength, mainly in core parts that need to reduce weight and improve performance and efficiency, such as engine systems, vehicle body structures, chassis and suspension systems, and wheel and transmission components, thereby providing important support for energy saving and performance optimization of automobiles.

[0003] In vehicle collision accidents, the vehicle body structure is often the most severely damaged part. In the field of automobile sheet metal repair, welding technology is a core means for repairing damaged vehicle body structures and connecting parts. For example, in the collision repair process, technicians need to fix the damaged metal plates through welding to restore the original structural strength and driving safety of the vehicle body.

[0004] At present, laser welding technology is mainly used for automobile aluminum alloy welding. The principle is to press the welding wire at the joint gap of the automobile sheet metal, and melt the welding wire through laser energy to achieve repair. The diameter of the welding wire used in this technology is usually between 0.6mm-1.2mm, and the welding quality requires high pressing force: too large pressing force is easy to cause welding wire fracture and lead to broken welding, and too small pressing force will cause unstable welding and affect the repair effect; at the same time, the gap width generated by automobile collision is unpredictable, and for the welding of wide gap, the operator needs to rely on his own experience to repeatedly shake the welding gun for operation. This operation method depending on manual experience not only has high requirements for the proficiency of the operator, but also has the risk of low welding precision and miswelding, which is difficult to meet the high quality demand of automobile sheet metal repair. SUMMARY

[0005] The purpose of the present application is to provide a laser welding device for aluminum alloy materials for automobiles to at least solve the problems of poor control of welding wire pressure and difficulty in accurately completing ultra-wide gap welding in the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a laser welding device for aluminum alloy materials for automobiles, comprising a box body, a button, a handle and a laser welding gun, the top end of the handle is installed on the lower surface right side of the box body, the button is embedded on the top of the upper surface of the handle, the box body is moved when the handle is held, the button is electrically connected with the laser welding gun, the button controls the start and stop of the laser welding gun, a widening mechanism is installed in the inner cavity of the box body, a buffer mechanism is installed at the rear end of the widening mechanism, a support frame is installed at the rear end of the buffer mechanism, the laser welding gun is installed on the inner side of the support frame, the widening mechanism swings back and forth, the welding width of the laser welding gun is adjusted, and the buffer mechanism applies welding pressure to ensure the stability of automobile welding.

[0007] Preferably, the widening mechanism comprises a swing rod mounted on the front end of the left inner wall of the box body through a pin shaft, a plurality of positioning holes are equidistantly arranged on the upper surface of the swing rod from left to right, a motor is mounted on the right side of the lower surface of the box body, a crankshaft is locked at one end of the output end of the motor through a shaft coupling, a first connecting rod is sleeved at the other end of the crankshaft, and the other end of the first connecting rod is connected with the right end of the swing rod through a pin shaft; under the driving of the motor, the crankshaft drives the first connecting rod to make a circular motion, and the first connecting rod drags the swing rod to reciprocate forward and backward; a limiting sleeve is mounted on the rear side of the box body, a sliding seat in the shape of an I-beam is slidably connected to the inner wall of the limiting sleeve, the complex shape of the sliding seat can enhance the sliding stability, a second connecting rod is mounted at the front end of the sliding seat through a pin shaft, and a positioning assembly is inserted into the other end of the second connecting rod; the positioning assembly is connected with the second connecting rod and the swing rod in a rotatable mode through cooperation with the positioning hole. Through linkage of the swing rod, the motor, the crankshaft, the first connecting rod and the second connecting rod, the laser welding gun can be reciprocated forward and backward, and welding of a wider gap can be completed.

[0008] Preferably, the center line of the sliding seat is perpendicular to the laser welding gun.

[0009] Preferably, the positioning assembly comprises a plug rod inserted into the front end of the second connecting rod, the plug rod can be inserted into the inner cavity of the positioning hole, a spring and a pressing column are sequentially inserted into the inner cavity of the plug rod from top to bottom, the spring exerts downward pressure on the pressing column through elastic force, and a plurality of clamping blocks are equidistantly inserted into the outer wall of the plug rod in a circumferential direction. The moving range of the second connecting rod is changed, so that the welding width is adjusted.

[0010] Preferably, the bottom of the pressing column is in the shape of a cone.

[0011] Preferably, the inner side of the clamping block is in the shape of an inclined plane, and the outer side is in the shape of a triangle.

[0012] Preferably, the buffering mechanism comprises a base mounted on the rear end of the sliding seat, an observation window is arranged on the outer wall of the base, a stop block is mounted on the inner wall of the base, a rotating shaft is mounted on the center position of the inner cavity of the base through a bearing, the rear end of the rotating shaft is mounted with the front end of a supporting frame, a torsional spring is sleeved on the outer wall of the rotating shaft, and a rotating disc corresponding to the position of the observation window is further mounted on the middle part of the outer wall of the rotating shaft; under the action of the torsional force of the torsional spring, the rotating disc is driven to rotate counterclockwise; the rotating disc is a notched rotating disc, the rotating angle of the rotating disc is restricted through the stop block, and a color plate is bonded to the outer wall of the rotating disc. The mechanical pressure is used to replace artificial pressure, the pressure temperature provided to the welding wire is ensured, and the welding quality is guaranteed.

[0013] Preferably, the color plate is divided into three parts, and the colors of the three parts are different.

[0014] The laser welding device for the aluminum alloy material for automobiles has the beneficial effects that: 1、The present application is designed by the coaxial rotation of the shaft, the turntable and the laser welding gun, and the torsional force characteristics of the torsional spring are used to make the welding pressure change accurately with the rotation angle of the turntable; in combination with the observation window on the base and the color plate designed on the outer wall of the turntable, the operator can intuitively judge the current pressure size through the color of the color plate, and can match the optimal pressure for welding wires of different diameters without relying on experience, effectively avoiding the problems of broken welding caused by excessive pressure and unstable welding caused by insufficient pressure, reducing the requirement for the proficiency of the operator, and enabling both beginners and experienced technicians to work stably, which not only significantly improves the consistency of welding quality, but also widens the application scenarios and user coverage of the device.

[0015] 2、Relying on the circular motion of the motor-driven crankshaft, the front and rear reciprocating swing is realized through the first connecting rod pulling the swing rod, and then the linkage transmission of the second connecting rod and the sliding seat drives the laser welding gun to complete the regular and stable mechanical swing welding. Compared with the traditional manual shaking operation mode of the welding gun, the mechanical linkage completely eliminates the irregularity of manual operation, effectively avoids the risks of low welding precision, miswelding and missed welding, and ensures the uniformity and accuracy of ultra-wide gap welding.

[0016] 3、Through the detachable connection of the inserting rod and the swing rod in the positioning assembly, combined with the synergistic effect of the spring, the extrusion column and the clamping block, the extrusion column pushes the clamping block outward under the spring force, greatly enhancing the connection resistance of the inserting rod and the positioning hole, and ensuring the stability of the linkage structure. By switching the connection position of the positioning hole, the moving range of the second connecting rod can be flexibly changed, and then the swing range of the laser welding gun can be adjusted, realizing accurate welding of different width gaps, without the need for additional equipment to adapt to the unpredictable variety of gap scenarios after automobile collision, significantly reducing the difficulty and cost of automobile sheet metal repair. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of the present application; Figure 2 is a perspective view of the widening mechanism of the present application; Figure 3 is an exploded view of the positioning assembly of the present application; Figure 4 is a perspective view of the present application Figure 3 is an enlarged view of A in the present application; Figure 5 is a schematic view of the clamping block structure of the present application; Figure 6 is a perspective view of the buffering mechanism of the present application; Figure 7 is a perspective view of the turntable of the present application.

[0018] In the figure: 1, box body; 2, button; 3, handle; 4, widening mechanism; 5, buffer mechanism; 6, support frame; 7, laser welding gun; 41, swing rod; 42, positioning hole; 43, motor; 44, crankshaft; 45, first connecting rod; 46, limiting sleeve; 47, sliding seat; 48, second connecting rod; 49, positioning assembly; 491, insertion rod; 492, spring; 493, extrusion column; 494, clamping block; 51, base; 52, observation window; 53, stop block; 54, rotating shaft; 55, torsional spring; 56, rotating disc; 57, color plate. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0020] Please refer to Figures 1-7 The present application provides a technical solution: a laser welding device for aluminum alloy material for automobiles, comprising a box body 1, a button 2, a handle 3 and a laser welding gun 7. The top end of the handle 3 is installed on the right side of the lower surface of the box body 1. The button 2 is embedded on the top of the upper surface of the handle 3. The box body 1 is moved when the handle 3 is held. The button 2 is electrically connected with the laser welding gun 7. The button 2 controls the start and stop of the laser welding gun 7. The widening mechanism 4 is installed in the inner cavity of the box body 1. The buffer mechanism 5 is installed at the rear end of the widening mechanism 4. The support frame 6 is installed at the rear end of the buffer mechanism 5. The laser welding gun 7 is installed on the inner side of the support frame 6. The widening mechanism 4 swings back and forth to adjust the welding width of the laser welding gun 7. The buffer mechanism 5 applies welding pressure to ensure the stability of automobile welding.

[0021] As a preferred further, the widening mechanism 4 comprises a swing rod 41 mounted on the front end of the left inner wall of the box body 1 through a pin shaft, a plurality of positioning holes 42 are equidistantly arranged on the upper surface of the swing rod 41 from left to right, a motor 43 is mounted on the right side of the lower surface of the box body 1, a crankshaft 44 is locked at one end of the output end of the motor 43 through a shaft coupling, the other end of the crankshaft 44 is sleeved with one end of a first connecting rod 45, and the other end of the first connecting rod 45 is connected with the right end of the swing rod 41 through a pin shaft, under the driving of the motor 43, the crankshaft 44 drives the first connecting rod 45 to make a circular motion, the first connecting rod 45 pulls the swing rod 41 to reciprocate back and forth, the positioning holes 42 at different positions have different swing amplitudes, the welding width is adjusted, a limiting sleeve 46 is mounted on the rear side of the box body 1, a I-shaped sliding seat 47 is slidingly connected to the inner wall of the limiting sleeve 46, the complex shape of the sliding seat 47 can enhance the sliding stability, the sliding seat 47 is perpendicular to the laser welding gun 7, the sliding seat 47 drives the laser welding gun 7 to move transversely, which is convenient for the operator to change the welding position, the second connecting rod 48 is mounted at one end of the front end of the sliding seat 47 through a pin shaft, the other end of the second connecting rod 48 is inserted with a positioning assembly 49, the positioning assembly 49 is connected with the second connecting rod 48 and the swing rod 41 through the cooperation of the positioning holes 42; Instead of manual operation, the welding deviation caused by manual shaking is avoided, and the welding precision is improved.

[0022] As a preferred further, the positioning assembly 49 comprises an insertion rod 491 inserted into the front end of the second connecting rod 48, the insertion rod 491 can be inserted into the inner cavity of the positioning hole 42, the swing rod 41 and the sliding seat 47 are connected, springs 492 and extrusion columns 493 are sequentially inserted into the inner cavity of the insertion rod 491 from top to bottom, the spring 492 exerts downward pressure on the extrusion column 493, the bottom of the extrusion column 493 is conical, the inclined surface of the extrusion column 493 can extrude the clamping block 494 outward, so that the clamping block 494 extends out of the insertion rod 491, preventing the insertion rod 491 from being separated from the swing rod 41, a plurality of clamping blocks 494 are equidistantly inserted into the outer wall of the insertion rod 491, the inner side of the clamping block 494 is inclined, and the outer side is triangular, the inner side of the clamping block 494 moves relative to the extrusion block 493, and the outer side moves automatically into the insertion rod 491 when the clamping block 494 is subjected to an external force; The positioning assembly 49 and the positioning hole 42 are connected, the second connecting rod 48 and the swing rod 41 are connected, the adjustment mode is simple, the connection is firm, and the stable operation of the linkage structure is guaranteed; different positioning holes 42 are connected to correspond to different swing amplitudes, the welding width can be flexibly adjusted, and the diversified gaps in automobile repair cannot be predicted.

[0023] When the wider gap of the automobile aluminum alloy sheet metal needs to be welded, the motor 43 is started, the motor 43 outputs the rotating power to drive the crankshaft 44 to rotate around its axis, and since one end of the first connecting rod 45 is sleeved on the eccentric position of the crankshaft 44, the rotating movement of the crankshaft 44 is converted into the circular movement of one end of the first connecting rod 45; the other end of the first connecting rod 45 drives the swing rod 41 through the pin shaft, so that the swing rod 41 realizes the reciprocating swing around the pin shaft connected with the box body 1.

[0024] During the forward and backward swing of the swing rod 41, the second connecting rod 48 is driven by the positioning assembly 49 to move synchronously, and the second connecting rod 48 drives the sliding seat 47 to slide back and forth along the inner wall of the limiting sleeve 46; since the laser welding gun 7 is connected with the buffer mechanism 5 at the rear end of the sliding seat 47 through the support frame 6, the reciprocating sliding of the sliding seat 47 directly drives the laser welding gun 7 to realize the forward and backward swing, so that the welding range of the laser welding gun 7 covers a wider gap area, and the welding work of the wide gap is completed.

[0025] In this process, the I-shaped structure of the sliding seat 47 effectively avoids the deviation in the sliding process, and ensures the accurate swing track of the laser welding gun 7; at the same time, the center line of the sliding seat 47 is vertically arranged with the laser welding gun 7, so that the swing direction of the welding gun is consistent with the width direction of the gap, further improving the uniformity and accuracy of the wide gap welding, completely replacing the traditional manual shaking operation mode of the welding gun, avoiding the welding deviation caused by irregular human operation, and significantly improving the welding precision.

[0026] When the width of the automobile sheet metal gap changes and the welding width needs to be adjusted, the operator can realize the adjustment by switching the connection position of the positioning assembly 49 and the positioning hole 42 on the swing rod 41. When adjusting, the plug rod 491 is pulled upward, and the upper surface of the swing rod 41 exerts an upward extrusion force on the outer triangular structure of the clamping block 494; since the outer side of the clamping block 494 is triangular, the extrusion force is decomposed into a component force along the radial direction of the plug rod 491, which promotes the clamping block 494 to automatically shrink into the inner cavity of the plug rod 491; at this time, the plug rod 491 can be easily taken out of the current positioning hole 42. According to the target welding width requirement, the second connecting rod 48 is rotated, the plug rod 491 is aligned with the corresponding positioning hole 42 on the swing rod 41 and inserted; during the insertion process, the spring 492 releases the elastic force to push the extrusion column 493 downward, the conical surface at the bottom of the extrusion column 493 and the inner inclined surface of the clamping block 494 are extruded with each other, a component force along the radial direction of the plug rod 491 is generated, the clamping block 494 is pushed out from the outer wall of the plug rod 491 and clamped on the inner wall of the positioning hole 42, the firm connection of the plug rod 491 and the positioning hole 42 is realized, the pullout resistance of the plug rod 491 is greatly enhanced, and the stable operation of the linkage structure in the welding process is ensured.

[0027] Due to the different distances between each positioning hole 42 on the swing rod 41 and the swing axis of the swing rod 41, when the positioning assembly 49 is connected with different positioning holes 42, the swing range of the second connecting rod 48 changes accordingly, thereby changing the swing range of the slide 47 and the laser welding gun 7: the closer the positioning hole 42 is to the left end of the swing rod 41 away from the swing axis, the greater the swing range of the laser welding gun 7, and the wider the welding width; the closer the positioning hole 42 is to the right end of the swing rod 41 close to the swing axis, the smaller the swing range of the laser welding gun 7, and the narrower the welding width. Through this step-by-step adjustment mode, the flexible adaptation to the unpredictable and various gap width scenarios after the automobile collision can be realized, without the need for additional equipment replacement, thereby significantly reducing the difficulty and cost of automobile sheet metal repair.

[0028] As a preferred solution, further, the buffer mechanism 5 includes a base 51 installed at the rear end of the slide 47, an observation window 52 is formed in the outer wall of the base 51, a stop block 53 is installed at the bottom of the inner wall of the base 51, a rotating shaft 54 is installed at the center position of the inner cavity of the base 51 through a bearing, the rear end of the rotating shaft 54 is installed with the front end of the support frame 6, so that the laser welding gun 7 rotates around the rotating shaft 54 as the center, a torsional spring 55 is sleeved on the outer wall of the rotating shaft 54, a rotating disc 56 corresponding to the position of the observation window 52 is also installed on the outer wall of the rotating shaft 54, the rotating disc 56 is driven to rotate counterclockwise under the action of the torsional force of the torsional spring 55, the rotating disc 56 is a notched rotating disc, the rotating angle of the rotating disc 56 is restricted by the stop block 53, a color plate 57 is bonded to the outer wall of the rotating disc 56, the color plate 57 is divided into three parts, and each part has a different color, as the rotating disc 56 rotates, the size of the reverse force applied by the torsional spring 55 also changes, and the color of the color plate 57 displayed by the observation window 52 reflects the size of the applied pressure, and according to the different thicknesses of the welding wire, the appropriate welding pressure is selected.

[0029] In the laser welding operation of automobile aluminum alloy materials, the operator holds the handle 3 to aim the laser welding gun 7 at the welding gap, so that the welding wire on the welding gun contacts the surface of the workpiece to be welded and applies a pressing force: During the pressing process, the laser welding gun 7 drives the rotating shaft 54 to rotate in the clockwise direction through the support frame 6, since the two ends of the torsional spring 55 are fixed to the base 51 and the rotating shaft 54 respectively, the clockwise rotation of the rotating shaft 54 will cause the torsional spring 55 to deform, the reverse torsional force generated by the torsional deformation is transmitted to the laser welding gun 7 through the rotating shaft 54 and the support frame 6, and finally converted into the welding pressure acting on the welding wire, achieving the effect of replacing manual pressure with mechanical pressure.

[0030] As the clockwise rotation angle of the rotating shaft 54 increases, the degree of torsional deformation of the torsional spring 55 gradually increases, and the reverse torsional force generated by the torsional spring 55 also increases, that is, the welding pressure gradually increases; on the contrary, as the clockwise rotation angle of the rotating shaft 54 decreases, the welding pressure also decreases accordingly, thereby realizing the precise linear adjustment of the welding pressure with the rotation angle.

[0031] Since the rotating disc 56 is fixedly connected with the rotating shaft 54, the rotating shaft 54 rotates synchronously to drive the rotating disc 56 to rotate in the clockwise direction, and the color plate 57 on the outer wall of the rotating disc 56 rotates synchronously, at this time, the operator can observe the color exposed by the color plate 57 through the observation window 52 on the base 51 in real time, and judge the current welding pressure according to the color: The three parts of the preset color plate 57 correspond to the optimal welding pressure of the commonly used welding wire diameters (0.6mm, 0.8mm-1.0mm, 1.2mm) of the automobile aluminum alloy: for example, the red color corresponds to the minimum pressure (adapted to 0.6mm thin welding wire, to avoid the breakage of the welding wire caused by excessive pressure), the yellow color corresponds to the medium pressure (adapted to 0.8mm-1.0mm medium diameter welding wire, to ensure the welding firmness), and the blue color corresponds to the maximum pressure (adapted to 1.2mm thick welding wire, to ensure that the welding wire is fully attached to the workpiece and melts).

[0032] Before welding, the operator adjusts the rotating angle of the rotating shaft 54 by slightly pressing the laser welding gun 7 according to the specific diameter of the welding wire used, until the corresponding color is displayed in the observation window 52, and then the current welding pressure can be locked, and the subsequent welding process can be maintained at this pressing degree, so that the welding wire can be provided with stable and suitable welding pressure without relying on the experience of the operator.

[0033] The rotating disc 56 adopts a notched design, when the rotating shaft 54 drives the rotating disc 56 to rotate clockwise, the notch edge of the rotating disc 56 gradually approaches the stop block 53; when the rotating disc 56 rotates to the maximum angle, the stop block 53 tightly abuts against the notch edge of the rotating disc 56, limiting the rotating shaft 54 from continuing to rotate clockwise, thereby avoiding the torsional spring 55 from being excessively twisted beyond the elastic limit and being damaged, and preventing the welding wire from being broken or the workpiece from being deformed due to excessive welding pressure, and ensuring the safety and stability of the device operation.

[0034] When the welding operation is completed, the operator releases the pressing force on the laser welding gun 7, the torsional deformation of the torsional spring 55 is restored, and the torsional force drives the rotating shaft 54 to drive the rotating disc 56 to rotate counterclockwise until the other notch edge of the rotating disc 56 abuts against the stop block 53, and the device returns to the initial state for the next welding operation.

[0035] Through the structural design and working mechanism of the above-mentioned buffer mechanism 5, the following technical effects are achieved: The torsional spring 55 provides stable mechanical welding pressure, replacing the traditional manual pressing method, avoiding the problem of uneven pressing force and difficult control in manual operation, effectively eliminating the phenomenon of broken welding caused by excessive pressure or unstable welding caused by insufficient pressure, and significantly improving the consistency of welding quality.

[0036] The three-color partition design of the color plate 57, combined with the visualization of the observation window 52, ​​makes the adjustment of welding pressure intuitive and convenient. Operators can quickly match the optimal pressure according to the diameter of the welding wire without relying on professional experience, which reduces the requirements for the operator's proficiency and broadens the coverage of the user group of the device. Both novices and experienced technicians can operate stably.

[0037] The cooperation between turntable 56 and stop block 53 achieves mechanical constraint on the rotation angle of rotating shaft 54, avoids damage to torsion spring 55 due to excessive torsion, and limits the maximum welding pressure, ensuring the service life of the device and the safety of welding operations, and further enhancing the practical value of the device.

[0038] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0039] Step 1: Hold handle 3 to move the laser welding gun 7 along the docking point. Button 2 controls the start and stop of the laser welding gun 7. The laser melts the welding wire and welds the car. When the welding wire on the laser welding gun 7 is pressed onto the workpiece to be welded, the support frame 6 drives the rotating shaft 54 ​​to rotate clockwise. At the same time, the turntable 56 rotates with the rotating shaft 54. The torsion spring 55 applies pressure to the welding wire. By observing the color displayed on the color plate 57 through the observation window 52, ​​the rotation angle of the turntable 56 is determined, and the welding pressure of the corresponding diameter welding wire is selected to make the weld stronger. Step 2: When it is necessary to increase the welding width, the motor 43 provides rotational power, which drives the crankshaft 44 to drive one end of the first connecting rod 45 to make a circular motion. The other end of the first connecting rod 45 pulls the swing rod 41 to swing back and forth. When the swing rod 41 moves, it drags the second connecting rod 48, which causes the slide 47 to drive the laser welding gun 7 to swing back and forth, thereby controlling the welding width and replacing the problem of irregular manual operation, so as to realize the welding of the butt joints with a large width of automobiles. Step 3: When the welding width needs to be adjusted, lift the insert rod 491. The swing rod 41 presses against the inclined surface of the locking block 494, causing the locking block 494 to automatically retract into the insert rod 491, removing the insert rod 491 from the positioning hole 42. With the rotation of the second connecting rod 48, the insert rod 491 is reinserted into another positioning hole 42. The spring 492 pushes the extrusion column 493 downward. Under the mutual extrusion of the extrusion column 493 and the inclined surface of the locking block 494, the locking block 494 extends out from the insert rod 491, increasing the pull-out resistance of the insert rod 491. By using the different swing amplitudes on the left and right sides of the swing rod 41, the welding width can be adjusted, which is suitable for welding various butt joints.

[0040] The above describes the basic principles, main features and advantages of the present application. However, the above description is only for specific embodiments of the present application, and the technical features of the present application are not limited thereto. Any other embodiments obtained by those skilled in the art without departing from the technical solutions of the present application should be covered in the patent scope of the present application.

[0041] In the description of the present application, each embodiment focuses on the differences from other embodiments, and the same or similar parts between various embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.

[0042] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A laser welding device for automotive aluminum alloy materials, comprising a housing (1), a button (2), a handle (3), and a laser welding gun (7), wherein the top of the handle (3) is installed on the right side of the lower surface of the housing (1), the button (2) is embedded in the top of the upper surface of the handle (3), the housing (1) is moved when the handle (3) is held, the button (2) is electrically connected to the laser welding gun (7), and the button (2) controls the start and stop of the laser welding gun (7), characterized in that, The inner cavity of the box (1) is equipped with a widening mechanism (4), a buffer mechanism (5) is installed at the rear end of the widening mechanism (4), a support frame (6) is installed at the rear end of the buffer mechanism (5), and the laser welding gun (7) is installed inside the support frame (6). The widening mechanism (4) swings back and forth in a circular motion to adjust the welding width of the laser welding gun (7), while the buffer mechanism (5) applies welding pressure to ensure the stability of the car welding.

2. The laser welding device for automotive aluminum alloy materials according to claim 1, characterized in that, The widening mechanism (4) includes a swing rod (41) mounted on the front end of the left inner wall of the box (1) via a pin. The upper surface of the swing rod (41) has several positioning holes (42) evenly spaced from left to right. A motor (43) is mounted on the right side of the lower surface of the box (1). The output end of the motor (43) is locked with one end of a crankshaft (44) via a coupling. The other end of the crankshaft (44) is sleeved with one end of a first connecting rod (45), and the other end of the first connecting rod (45) is connected to the right end of the swing rod (41) via a pin. Under the drive of the motor (43), the crankshaft (44) drives the first connecting rod (45) to move. The rod (45) makes a circular motion, and the first connecting rod (45) pulls the swing rod (41) to swing back and forth. The box (1) is equipped with a limit sleeve (46) on the rear side. The inner wall of the limit sleeve (46) is slidably connected to an I-shaped slide block (47). The complex shape of the slide block (47) can enhance the sliding stability. The front end of the slide block (47) is installed with one end of the second connecting rod (48) through a pin. The other end of the second connecting rod (48) is inserted with a positioning component (49). The positioning component (49) cooperates with the positioning hole (42) to rotate and connect the second connecting rod (48) and the swing rod (41).

3. The laser welding device for automotive aluminum alloy materials according to claim 2, characterized in that, The centerline of the slide (47) is perpendicular to the laser welding gun (7).

4. The laser welding device for automotive aluminum alloy materials according to claim 3, characterized in that, The positioning component (49) includes a rod (491) inserted into the front end of the second connecting rod (48). The rod (491) can be inserted into the inner cavity of the positioning hole (42). A spring (492) and a pressing column (493) are inserted into the inner cavity of the rod (491) from top to bottom. The spring (492) applies downward pressure to the pressing column (493). Several locking blocks (494) are inserted at equal intervals along the circumference at the bottom of the outer wall of the rod (491).

5. The laser welding device for automotive aluminum alloy materials according to claim 4, characterized in that, The bottom of the extrusion column (493) is conical.

6. The laser welding device for automotive aluminum alloy materials according to claim 5, characterized in that, The inner side of the card block (494) is a slope, and the outer side is triangular.

7. The laser welding device for automotive aluminum alloy materials according to claim 6, characterized in that, The buffer mechanism (5) includes a base (51) installed at the rear end of the slide (47). An observation window (52) is provided on the outer wall of the base (51). A stop block (53) is installed at the bottom of the inner wall of the base (51). A rotating shaft (54) is installed at the center of the inner cavity of the base (51) via a bearing. The rear end of the rotating shaft (54) is installed at the front end of the support frame (6). A torsion spring (55) is sleeved on the outer wall of the rotating shaft (54). A turntable (56) corresponding to the position of the observation window (52) is also installed in the middle of the outer wall of the rotating shaft (54). The turntable (56) is driven to rotate counterclockwise under the torque of the torsion spring (55). The turntable (56) is a notched turntable. The rotation angle of the turntable (56) is constrained by the stop block (53). A colored plate (57) is glued to the outer wall of the turntable (56).

8. The laser welding device for automotive aluminum alloy materials according to claim 7, characterized in that, The color swatch (57) is divided into three parts, and each part has a different color.

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