Laser-electric arc hybrid welding method and device for truck frame

Abstract

The invention discloses a truck frame laser-electric arc hybrid welding method and device, and relates to the technical field of truck frame welding, the truck frame laser-electric arc hybrid welding device comprises a welding mechanism and a control cabinet, a quick dismounting mechanism comprises a first clamping block, a sleeve is fixed to the surface of the first clamping block, a second clamping block is arranged above the first clamping block, and the second clamping block is fixed to the surface of the sleeve. And a limiting block is arranged between the outer surfaces of the two clamping ends of the second clamping block, a spring is fixed to the top of the sleeve, clamping rods are fixed to the interiors of two grooves of the limiting block, a U-shaped block is arranged between the outer surfaces of the two clamping ends of the second clamping block, and a wedge block is additionally arranged at the top of the inner wall of the U-shaped block. The dismounting and mounting time of the electric arc welding gun and the laser welding head can be greatly shortened, and the part and the equipment main body can be quickly separated without a complicated tool, so that the use efficiency of the laser-electric arc hybrid welding equipment for the truck frame is improved.

Description

Technical Field

[0001] This invention relates to the field of truck frame welding technology, specifically to a laser-arc hybrid welding method and apparatus for truck frames. Background Technology

[0002] The truck frame is the core load-bearing component of a truck, equivalent to the "skeleton" of the entire vehicle. It is mainly composed of longitudinal beams, cross beams, and connecting parts. During the manufacturing process of the truck frame, the welding parts are generally operated using laser-arc composite welding equipment.

[0003] In laser-arc hybrid welding equipment, the arc welding gun and laser welding head are the core components. They are prone to wear, failure, or performance degradation under high-intensity welding conditions for a long time, requiring regular maintenance and replacement. However, the installation mechanism of the arc welding gun and laser welding head mostly adopts traditional fixed structures such as bolt fastening and flange connection. That is, the arc welding gun and laser welding head are rigidly fixed to the main frame or adjusting arm of the equipment by multiple sets of bolts. Although this method can ensure the stability of the connection, the bolts must be loosened one by one when disassembling, which is cumbersome and time-consuming, thereby increasing downtime for maintenance and affecting the continuity of production.

[0004] Therefore, we propose a new laser-arc hybrid welding method and apparatus for truck frames to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a laser-arc hybrid welding method and apparatus for truck frames. By setting a quick-release mechanism, the disassembly and installation time of the arc welding gun and the laser welding head can be greatly reduced, and the components can be quickly separated from the main body of the equipment without complicated tools, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a laser-arc composite welding device for truck frames, comprising a welding mechanism and a control cabinet, wherein the welding mechanism includes a robotic arm, a first rectangular plate is mounted on the bottom of the front end of the robotic arm, and a quick-release mechanism is provided on the welding mechanism; The quick-release mechanism includes a first locking block, a sleeve fixed to the surface of the first locking block, a second locking block above the first locking block, a limiting block between the outer surfaces of the two locking ends of the second locking block, a T-shaped rod fixed to the bottom center of the limiting block, a spring fixed to the top of the sleeve, locking rods fixed inside the two grooves of the limiting block, a U-shaped block between the outer surfaces of the two locking ends of the second locking block, a wedge added to the top of the inner wall of the U-shaped block, and two symmetrical mounting brackets fixed to the surface of the U-shaped block.

[0007] Preferably, the bottom end of the T-shaped rod is movably sleeved inside the sleeve, and the bottom end of the T-shaped rod is also movably sleeved inside the spring. The top end of the spring is fixed to the surface of the T-shaped rod, and a collar is fixedly sleeved on the outer surface of the T-shaped rod near the middle position.

[0008] Preferably, the two locking rods respectively movably penetrate the outer surfaces of the two locking ends of the second locking block, the two mounting brackets are symmetrically mounted on the first rectangular plate, the bottom edge of the limiting block contacts the inclined surface of the wedge block, and the top end of the T-shaped rod is located inside the inclined groove of the wedge block.

[0009] Preferably, the bottom of the first rectangular plate contacts a second rectangular plate, the top of the second rectangular plate has a pre-set cylindrical hole, a cylindrical block is fixed inside the cylindrical hole, and an arc welding gun is provided on the outer surface of the cylindrical block.

[0010] Preferably, the second locking block is used to fix the cylindrical block and the arc welding gun, a wire feeder is installed on the surface of the second rectangular plate, the wire feeder's wire outlet end is connected to a wire guide tube, and a set of sliding grooves is preset at the bottom of the first rectangular plate.

[0011] Preferably, each of the grooves is slidably connected to a slide bar, the bottom of each slide bar is fixed to the top of the second rectangular plate, and an electric actuator is installed at the bottom of the first rectangular plate, with the telescopic end of the electric actuator being installed with the second rectangular plate.

[0012] Preferably, a set of mounting plates is fixed at the bottom near the edge of the second rectangular plate, and a laser welding head is provided between the set of mounting plates near the bottom. The first locking block is used to fix the set of mounting plates and the laser welding head.

[0013] A method for laser-arc hybrid welding of truck frames includes the following steps: S1. When it is necessary to weld two components that make up the truck frame together, the robotic arm, the first rectangular plate, the second rectangular plate, the cylindrical block, the slide bar, the slide groove and a set of mounting plates are used to make the arc welding gun and the laser welding head move at a constant speed according to the preset welding speed. Then, the control cabinet, the conveyed shielding gas, the conveyed wire, the started arc welding gun and the started laser welding head are used to perform welding operations on the two components. S2. When it is necessary to fine-tune the position of the arc welding gun and laser welding head, the second rectangular plate can be adjusted by directly using the control cabinet, electric push rod, a set of slides, a set of slide bars and the first rectangular plate in the fixed state. S3. When it is necessary to remove the laser welding head and the arc welding gun from the corresponding set of mounting plates and the cylindrical block respectively, first use the moving second rectangular plate, the two mounting brackets, the U-shaped block, the wedge block and the fixed first rectangular plate to move the limiting block upward, remove all the clamps from the second clamp block, then remove the second clamp block to release the fixation between the cylindrical block and the arc welding gun, and then use the moving sleeve to move the first clamp block to release the fixation between the set of mounting plates and the laser welding head.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by setting a quick-release mechanism, the disassembly and installation time of the arc welding gun and the laser welding head can be greatly reduced, and the components can be quickly separated from the main body of the equipment without complicated tools, thereby improving the utilization efficiency of the laser-arc composite welding equipment for truck frames. Through the cooperation of the moving second rectangular plate, two mounting brackets, U-shaped block and wedge block, the limiting block can drive all the locking rods to move away from the second locking block. Through the cooperation of the spring contraction force, the limiting block, all locking rods, T-shaped rod, sleeve and the first locking block in the locking state, the second locking block can be prevented from moving.

[0015] 2. In this invention, by setting up a welding mechanism, two components that make up the truck frame can be welded together. By cooperating with a robotic arm, a first rectangular plate, a second rectangular plate, a cylindrical block and a set of mounting plates, the arc welding gun and the laser welding head can be moved simultaneously. By cooperating with an electric push rod, a slide groove, a slide bar and the first rectangular plate, the second rectangular plate can be driven to make fine adjustments to its position. Attached Figure Description

[0016] Figure 1 This is a frontal view of the structure of the laser-arc composite welding device for truck frames of the present invention. Figure 2 This is a partial perspective view from the side of the laser-arc composite welding device for truck frames of the present invention. Figure 3 This is a perspective view of another angle of the laser-arc composite welding device for truck frames of the present invention; Figure 4 This is a bottom-view perspective view of the laser-arc composite welding device for truck frames according to the present invention. Figure 5 This is a side view of the structure of the laser-arc composite welding device for truck frames of the present invention. Figure 6 This is a bottom-view sectional perspective view of the laser-arc composite welding device for truck frames of the present invention. Figure 7 The present invention relates to a laser-arc hybrid welding device for truck frames. Figure 6Enlarged 3D view of the structure at point A in the middle; Figure 8 This is a sectional perspective view of the quick-release mechanism of the laser-arc composite welding device for truck frames of the present invention.

[0017] In the diagram: 1. Welding mechanism; 101. Robotic arm; 102. First rectangular plate; 103. Wire feeder; 104. Second rectangular plate; 105. Cylindrical hole; 106. Cylindrical block; 107. Arc welding torch; 108. Wire guide tube; 109. Slide groove; 110. Slide bar; 111. Electric push rod; 112. Mounting plate; 113. Laser welding head; 2. Quick release mechanism; 201. First locking block; 202. Sleeve; 203. Second locking block; 204. T-shaped rod; 205. Spring; 206. Collar; 207. Limiting block; 208. Locking rod; 209. Mounting bracket; 210. U-shaped block; 211. Wedge block; 3. Control cabinet. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1-7 As shown, the present invention provides a technical solution: a laser-arc hybrid welding device for truck frames, including a welding mechanism 1 and a control cabinet 3. The welding mechanism 1 includes a robotic arm 101, with a first rectangular plate 102 mounted on the bottom of the front end of the robotic arm 101. The bottom of the first rectangular plate 102 contacts a second rectangular plate 104. A cylindrical hole 105 is pre-set on the top of the second rectangular plate 104, and a cylindrical block 106 is fixed inside the cylindrical hole 105. An arc welding gun 107 is provided on the outer surface of the cylindrical block 106. A wire feeder 103 is mounted on the surface of the second rectangular plate 104. The wire outlet end of 103 is connected to the wire guide tube 108. The bottom of the first rectangular plate 102 is pre-set with a set of sliding grooves 109. Each sliding groove 109 is slidably connected with a sliding strip 110. The bottom of each sliding strip 110 is fixed to the top of the second rectangular plate 104. An electric push rod 111 is installed at the bottom of the first rectangular plate 102. The telescopic end of the electric push rod 111 is installed with the second rectangular plate 104. A set of mounting plates 112 is fixed at the bottom of the second rectangular plate 104 near the edge. A laser welding head 113 is set between the mounting plates 112 near the bottom.

[0020] In this embodiment, when two components forming a truck frame need to be welded together, the two components are first fixed on the workbench. Then, the front end of the robotic arm 101 is moved by the motor on the control cabinet 3 and the robotic arm 101. The moving front end of the robotic arm 101 will drive all the components on it to move. When the welding end of the arc welding gun 107 moves to the connection between the two components, the control cabinet 3 will feed wire into the arc welding gun 107 through the wire feeder 103. At the same time, the arc welding gun 107 and the laser welding head 113 will be started. The laser emitted by the laser welding head 113 will act on the surface of the connection between the two weldments, forming an initial molten pool. Then, the arc welding gun 107 will ignite the wire and act on the molten pool area together with the laser. At the same time, the control cabinet 3 will also drive the arc welding gun 107 and the laser welding head 113 through the robotic arm 101, the first rectangular plate 102, the second rectangular plate 104, the cylindrical block 106, the slide bar 110, the slide groove 109 and the mounting plate 112. 13. Moving at a constant speed according to the preset welding speed, the welding operation is performed on the connection between the two parts. At the same time, the shielding gas is sprayed to prevent the weld from oxidizing. When it is necessary to fine-tune the position of the arc welding gun 107 and the laser welding head 113, the control cabinet 3 will start the electric push rod 111. The started electric push rod 111 will use the slide groove 109, the slide bar 110 and the first rectangular plate 102 to drive the second rectangular plate 104 to move. The moving second rectangular plate 104 will be driven by the mounting plate 112. As the arc welding gun 107 moves, the second rectangular plate 104, which also moves simultaneously, will drive the laser welding head 113 to move with the cooperation of the cylindrical block 106 and the cylindrical hole 105. After the arc welding gun 107 and the laser welding head 113 have completed their position fine-tuning, the electric push rod 111 is paused. When the welding reaches the end point, the arc welding gun 107 is turned off first, and then the laser welding head 113 is turned off after a delay of 1-2 seconds. Finally, the shielding gas supply is paused to ensure that the weld at the end is filled and to avoid incomplete penetration or porosity defects.

[0021] Example 2: According to Figures 1-8As shown, the welding mechanism 1 includes a robotic arm 101. A first rectangular plate 102 is mounted on the bottom front end of the robotic arm 101. The welding mechanism 1 is equipped with a quick-release mechanism 2, which includes a first locking block 201. A sleeve 202 is fixed to the surface of the first locking block 201. A second locking block 203 is positioned above the first locking block 201. A limiting block 207 is positioned between the outer surfaces of the two locking ends of the second locking block 203. A T-shaped rod 204 is fixed to the middle position of the bottom of the limiting block 207. A spring is fixed to the top of the sleeve 202. 205. A locking rod 208 is fixed inside each of the two grooves of the limiting block 207. A U-shaped block 210 is provided between the outer surfaces of the two locking ends of the second locking block 203. A wedge 211 is installed on the top of the inner wall of the U-shaped block 210. Two symmetrical mounting brackets 209 are fixed to the surface of the U-shaped block 210. The bottom end of the T-shaped rod 204 is movably sleeved inside the sleeve 202, and simultaneously, the bottom end of the T-shaped rod 204 is also movably sleeved inside the spring 205. The top end of the spring 205 is fixed to the surface of the T-shaped rod 204. A collar 206 is fixedly fitted onto the outer surface of the second locking block 203 near the middle position. Two locking rods 208 respectively movably pass through the outer surfaces of the two locking ends of the second locking block 203. The bottom edge of the limiting block 207 contacts the inclined surface of the wedge block 211. The top of the T-shaped rod 204 is located inside the inclined groove of the wedge block 211. Two mounting brackets 209 are symmetrically mounted on the first rectangular plate 102. The bottom of the first rectangular plate 102 contacts the second rectangular plate 104. The top of the second rectangular plate 104 has a pre-set cylindrical hole 105. A cylindrical block 106 is fixed inside the 05, and an arc welding gun 107 is provided on the outer surface of the cylindrical block 106. The second locking block 203 is used to fix the cylindrical block 106 and the arc welding gun 107. An electric push rod 111 is installed at the bottom of the first rectangular plate 102. A set of mounting plates 112 is fixed at the bottom of the second rectangular plate 104 near the edge. A laser welding head 113 is provided between the set of mounting plates 112 near the bottom. The first locking block 201 is used to fix the set of mounting plates 112 and the laser welding head 113.

[0022] In this embodiment, when it is necessary to remove the laser welding head 113 and the arc welding gun 107 from the corresponding set of mounting plates 112 and the cylindrical block 106 respectively, the wedge block 211 is first installed back onto the U-shaped block 210, and then the second rectangular plate 104 is moved. At this time, the moving second rectangular plate 104 will use the cylindrical hole 105 and the cylindrical block 106 to move the second locking block 203. At the same time, the moving second rectangular plate 104 will also use a set of mounting plates 112 to drive the first locking block 201 to move. When the second locking block 203 moves, the limiting block 207 will move up the inclined plane with the cooperation of the two mounting brackets 209, the U-shaped block 210 and the wedge block 211. At the same time, the upward moving limiting block 207 will drive all the locking rods 208 connected to it to move. At the same time, the moving limiting block 207 will also move at the T-shaped rod 2 With the sleeve 202 in a fixed state, spring 205 is stretched. When all the locking rods 208 are removed from the second locking block 203, the electric push rod 111 is paused. Then, the second locking block 203 is removed from between the cylindrical block 106 and the arc welding gun 107, and the arc welding gun 107 can be removed from the cylindrical block 106. Then, the second rectangular plate 104 is reset to its original position. When the second rectangular plate 104 is reset to its original position, spring 205 will also be reset to its original position. Then, the sleeve 202 is moved so that the moving sleeve 202 removes the first locking block 201 from between a set of mounting plates 112. Then, the laser welding head 113 is removed from between a set of mounting plates 112. The operation is simple and the disassembly speed is fast, thereby reducing downtime maintenance time and ensuring production continuity.

[0023] The overall effect and working principle of the mechanism are as follows: In use, the robotic arm 101 and all components mounted on it are first installed on the worktable. Simultaneously, the control cabinet 3 is installed around the worktable. Once the control cabinet 3 is installed, all motors, wire feeders 103, electric actuators 111, arc welding guns 107, and laser welding heads 113 on the robotic arm 101 are connected to the control cabinet 3. The control cabinet 3 is then connected to the power supply equipment. Subsequently, the wire feeder is installed around the worktable, and the wire on the wire feeder is then passed through the mechanical arm. The pipe on the arm 101 is then fed into the inlet of the wire feeder 103. The wire feeder 103 is then controlled by the control cabinet 3 and fed into the inside of the arc welding gun 107 through the wire guide tube 108. When the wire emerges from the outlet of the arc welding gun 107, the wire feeder 103 is paused. Then, the equipment for conveying the protective gas is installed around the workbench. The hose for conveying the protective gas is then passed through the pipe on the robotic arm 101 and the outlet of the hose is connected to the inlet of the arc welding gun 107. Finally, the wedge 211 is removed from the U-shaped block 210. When two components forming a truck frame need to be welded together, the two components are first fixed on the workbench. Then, the front end of the robotic arm 101 is moved by the motors on the control cabinet 3 and the robotic arm 101. The moving front end of the robotic arm 101 will drive all the components on it to move. When the welding end of the arc welding gun 107 moves to the connection between the two components, the control cabinet 3, in coordination with the wire feeder 103, feeds wire into the arc welding gun 107 and starts the arc welding gun 107 and the laser welding head 113. The laser emitted by the laser welding head 113 will act on the surface of the connection between the two weldments, forming an initial molten pool. Then, the arc welding gun 107 will ignite the wire and work together with the laser to act on the molten pool area. At the same time, the control cabinet 3, in coordination with the robotic arm 101, the first rectangular plate 102, the second rectangular plate 104, the cylindrical block 106, the slide bar 110, the slide groove 109, and the mounting plate 112, will drive the arc welding gun 107. 7 and the laser welding head 113 move at a preset welding speed to perform welding operations on the connection between the two parts. At the same time, the shielding gas is sprayed to prevent the weld from oxidizing. When it is necessary to fine-tune the position of the arc welding gun 107 and the laser welding head 113, the control cabinet 3 will start the electric push rod 111. The started electric push rod 111 will use the slide groove 109, the slide bar 110 and the first rectangular plate 102 to drive the second rectangular plate 104 to move. The moving second rectangular plate 104 will use the mounting plate 112 to drive the arc welding gun 107 to move. At the same time, the moving second rectangular plate 104 will also drive the laser welding head 113 to move with the help of the cylindrical block 106 and the cylindrical hole 105. After the arc welding gun 107 and the laser welding head 113 have completed the position fine-tuning, the electric push rod 111 is paused. When the welding reaches the end point, the arc welding gun 107 is turned off first, and then the laser welding head 113 is turned off after a delay of 1-2 seconds. Finally, the shielding gas supply is stopped. When it is necessary to remove the laser welding head 113 and the arc welding gun 107 from the corresponding set of mounting plates 112 and the cylindrical block 106 respectively, first install the wedge block 211 back onto the U-shaped block 210, and then move the second rectangular plate 104. At this time, the moving second rectangular plate 104 will use the cylindrical hole 105 and the cylindrical block 106 to move the second locking block 203. At the same time, the moving second rectangular plate 104 will also use the set of mounting plates 112 to drive the first locking block 201 to move. When the second locking block 203 moves, the limiting block 207 will move up the inclined plane with the cooperation of the two mounting brackets 209, the U-shaped block 210 and the wedge block 211. At the same time, the upward moving limiting block 207 will drive all the locking rods 208 connected to it to move. With the cooperation of the T-shaped rod 204 and the sleeve 202 in a fixed state, the spring 205 is stretched. When all the locking rods 208 are removed from the second locking block 203, the electric push rod 111 is paused. Then, the second locking block 203 is removed from between the cylindrical block 106 and the arc welding gun 107, and the arc welding gun 107 can be removed from the cylindrical block 106. Then, the second rectangular plate 104 is reset to its original position (in the retracted state). When the second rectangular plate 104 is reset to its original position, the spring 205 will also be reset to its original position. Then, the sleeve 202 is moved so that the moving sleeve 202 removes the first locking block 201 from between a set of mounting plates 112. Then, the laser welding head 113 is removed from between a set of mounting plates 112.

[0024] The cables between the arc welding gun 107 and the control cabinet 3, and between the laser welding head 113 and the control cabinet 3, need to pass through the pipes on the robotic arm 101 before connecting the two components. At the same time, the equipment for delivering protective gas is also connected to the control cabinet 3.

[0025] The wiring diagram between control cabinet 3, robotic arm 101, wire feeder 103, electric actuator 111, arc welding gun 107, and laser welding head 113 is a publicly disclosed technology in this field. The model can be selected according to the actual situation. The control method and layout between control cabinet 3, robotic arm 101, wire feeder 103, electric actuator 111, arc welding gun 107, and laser welding head 113 are not described in detail here.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser-arc hybrid welding device for truck frames, comprising a welding mechanism (1) and a control cabinet (3), characterized in that: The welding mechanism (1) includes a robotic arm (101), a first rectangular plate (102) is installed at the bottom of the front end of the robotic arm (101), and a quick-release mechanism (2) is provided on the welding mechanism (1). The quick-release mechanism (2) includes a first locking block (201), a sleeve (202) is fixed on the surface of the first locking block (201), a second locking block (203) is provided above the first locking block (201), a limiting block (207) is provided between the outer surfaces of the two locking ends of the second locking block (203), a T-shaped rod (204) is fixed at the middle position of the bottom of the limiting block (207), a spring (205) is fixed at the top of the sleeve (202), a locking rod (208) is fixed inside the two grooves of the limiting block (207), a U-shaped block (210) is provided between the outer surfaces of the two locking ends of the second locking block (203), a wedge (211) is added to the top of the inner wall of the U-shaped block (210), and two symmetrical mounting brackets (209) are fixed on the surface of the U-shaped block (210).

2. The truck frame laser-arc hybrid welding device according to claim 1, characterized in that: The bottom end of the T-shaped rod (204) is movably sleeved inside the sleeve (202), and the bottom end of the T-shaped rod (204) is also movably sleeved inside the spring (205). The top end of the spring (205) is fixed to the surface of the T-shaped rod (204), and a collar (206) is fixedly sleeved on the outer surface of the T-shaped rod (204) near the middle position.

3. The truck frame laser-arc hybrid welding device according to claim 2, characterized in that: The two locking rods (208) respectively move through the outer surfaces of the two locking ends of the second locking block (203), the two mounting brackets (209) are symmetrically mounted on the first rectangular plate (102), the bottom edge of the limiting block (207) contacts the inclined surface of the wedge block (211), and the top of the T-shaped rod (204) is located inside the inclined groove of the wedge block (211).

4. The truck frame laser-arc hybrid welding device according to claim 3, characterized in that: The bottom of the first rectangular plate (102) is in contact with the second rectangular plate (104). The top of the second rectangular plate (104) is pre-set with a cylindrical hole (105). A cylindrical block (106) is fixed inside the cylindrical hole (105). An arc welding gun (107) is provided on the outer surface of the cylindrical block (106).

5. The truck frame laser-arc composite welding device according to claim 4, characterized in that: The second locking block (203) is used to fix the cylindrical block (106) and the arc welding gun (107). A wire feeder (103) is installed on the surface of the second rectangular plate (104). The wire feeder (103) is connected to the wire guide tube (108) at the wire outlet end. A set of sliding grooves (109) is preset at the bottom of the first rectangular plate (102).

6. The truck frame laser-arc hybrid welding device according to claim 5, characterized in that: Each of the slide grooves (109) is slidably connected to a slide bar (110), the bottom of each slide bar (110) is fixed to the top of the second rectangular plate (104), and an electric push rod (111) is installed at the bottom of the first rectangular plate (102), the telescopic end of the electric push rod (111) is installed with the second rectangular plate (104).

7. The truck frame laser-arc hybrid welding device according to claim 6, characterized in that: A set of mounting plates (112) is fixed at the bottom near the edge of the second rectangular plate (104). A laser welding head (113) is provided between the set of mounting plates (112) near the bottom. The first locking block (201) is used to fix the set of mounting plates (112) and the laser welding head (113).

8. A method for laser-arc hybrid welding of truck frames, characterized in that, The use of the truck frame laser-arc hybrid welding apparatus of claim 7 includes the following steps: S1. When it is necessary to weld two components that make up the truck frame together, the robotic arm (101), the first rectangular plate (102), the second rectangular plate (104), the cylindrical block (106), the slide bar (110), the slide groove (109) and a set of mounting plates (112) are used to make the arc welding gun (107) and the laser welding head (113) move at a uniform speed according to the preset welding speed. Then, the control cabinet (3), the conveyed shielding gas, the conveyed wire, the started arc welding gun (107) and the started laser welding head (113) are used to perform welding operations on the two components. S2. When it is necessary to fine-tune the position of the arc welding gun (107) and the laser welding head (113), the second rectangular plate (104) can be adjusted directly by using the control cabinet (3), the electric push rod (111), a set of slides (109), a set of slide bars (110) and the first rectangular plate (102) in a fixed state. S3. When it is necessary to remove the laser welding head (113) and the arc welding gun (107) from the corresponding set of mounting plates (112) and the cylindrical block (106), first use the moving second rectangular plate (104), two mounting brackets (209), U-shaped block (210), wedge block (211) and the fixed first rectangular plate (102) to move the limiting block (207) upward, remove all the clamping rods (208) from the second clamping block (203), then remove the second clamping block (203) to release the fixation between the cylindrical block (106) and the arc welding gun (107), and then use the moving sleeve (202) to move the first clamping block (201) to release the fixation between the set of mounting plates (112) and the laser welding head (113).

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