Efficient repairing device and method based on laser cold welding

Abstract

The efficient repairing device based on laser cold welding comprises a base, a workbench and a chuck, linear guide rails are arranged on the front side and the rear side of the front end of the base correspondingly, electric sliding blocks are arranged on the linear guide rails, the two electric sliding blocks are each provided with a mounting base, and an adjusting mechanism is arranged on the top face of one mounting base; the welding repairing mechanism is detachably assembled on the top of the adjusting mechanism, the adjusting mechanism comprises a transverse moving mechanism, a rotating mechanism and synchronous wheels, and the two synchronous wheels are connected through a synchronous belt. The adjusting mechanism drives the welding repairing mechanism to perform left-right adjusting motion by utilizing a linear guide rail and an electric sliding block, front-back alignment of the welding repairing mechanism and a to-be-repaired position is realized, meanwhile, the adjusting mechanism is formed by combining a transverse moving mechanism and a rotating mechanism, and the transverse moving mechanism and the rotating mechanism are linked through a synchronous wheel and a synchronous belt; and front-back and angle rapid adjustment is achieved, and the time needed by position adjustment is greatly shortened.

Description

Technical Field

[0001] The invention relates to the field of laser cold welding repair, and in particular to a high-efficiency repair device and method based on laser cold welding. Background Art

[0002] In industrial production and manufacturing, many parts will be damaged and defective due to wear, corrosion, fatigue and other reasons, and need to be repaired to restore their performance and service life. Traditional repair methods such as arc welding and gas shielded welding have problems such as large heat affected zone, severe deformation, and low bonding strength. Laser cold welding, as a new repair technology, has the advantages of low heat input, small deformation, and high bonding strength, and is gradually gaining attention.

[0003] However, due to the size of the workpiece, when repairing workpieces of different sizes, the position of the laser generator and the cooling device needs to be adjusted in the front-to-back direction and the angle direction. The existing adjustment method generally adjusts in each direction, which is not only inefficient but also requires repeated calibration, thus wasting a lot of time. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-efficiency repair device based on laser cold welding to solve the problems existing in the above-mentioned background technology.

[0005] The present invention provides the following technical solutions: an efficient repair device based on laser cold welding, comprising a base, a workbench and a chuck, wherein the workbench is placed at the rear end of the base, and linear guides are arranged at the front and rear edges of the front end of the base, and an electric slider is arranged on the linear guide, and a mounting seat is installed on each of the two electric sliders, and an adjustment mechanism is arranged on the top surface of one of the mounting seats, and a welding repair mechanism is detachably assembled on the top of the adjustment mechanism, wherein the adjustment mechanism comprises a transverse movement mechanism and a rotation mechanism, and a synchronous wheel is sleeved on the tail of the output end of the transverse movement mechanism and the rotation mechanism, and the two synchronous wheels are connected by a synchronous belt, and a rotary handle is connected to the head of the output end of the transverse movement mechanism and the rotation mechanism, and rotating any one of the rotary handles makes the transverse movement mechanism and the rotation mechanism operate synchronously, thereby realizing synchronous adjustment of the front and back and angle of the welding repair mechanism.

[0006] Preferably, it also includes a cooling laser installed on another of the electric sliders, wherein the cooling mechanism includes a water storage box installed between the two electric sliders, and a water pump detachably installed on the other of the electric sliders, one end of the water pump is connected to a circulation pipe, and the end of the circulation pipe extends to the inner bottom end of the water storage box, the other end of the water pump is connected to a hard water pipe, and the top of the hard water pipe is connected to a universal joint pipe.

[0007] Preferably, a self-locking mechanism is elastically provided on one side of the front end of the workbench, a concave hole is opened at the corresponding position of the chuck and the automatic mechanism, and a stop switch is provided at the bottom of the concave hole. In the initial state, the rear end of the self-locking mechanism is inserted into the concave hole and abuts against the stop switch to trigger the workbench to stop working.

[0008] Preferably, the transverse movement mechanism includes a loading frame fixedly mounted on the electric slider, a screw rod rotatably mounted in the loading frame, and a slide table slidably mounted inside the loading frame, wherein the slide table is a T-shaped structure, and the sliding bottom is slidably placed inside the loading frame and is threadedly sleeved on the screw rod.

[0009] Preferably, the rotating mechanism includes a U-shaped bracket fixedly mounted on the top of the slide, a vertical plate fixedly mounted on the front and rear ends of the U-shaped bracket, a worm rotatably mounted on the vertical plate, bearings embedded in the tops of both ends of the U-shaped bracket, a rotating shaft plugged into the two bearings, a turbine fixedly mounted on the rotating shaft, and a mounting frame fixedly mounted at one end of the rotating shaft, wherein the worm and the turbine are transmission connected, and the mounting frame is used to assemble the welding repair device.

[0010] Preferably, the worm and the lead screw are in an upper and lower relationship, the front ends of the worm and the lead screw are fixedly connected with a rotary handle, the rear ends of the worm and the lead screw are sleeved with a synchronous wheel, and the synchronous wheels on the worm and the lead screw are connected through a synchronous belt transmission.

[0011] Preferably, the welding repair mechanism includes a mechanism welding gun detachably mounted on a mounting frame, a feed head movably mounted at the bottom of one end of the mechanism welding gun, a feed pipe connected to one end of the feed head, and a welding wire is arranged in the feed pipe, one end of the welding wire extends from the feed head for cooperating with a laser generator for welding repair.

[0012] Preferably, the self-locking mechanism includes two fixed plates fixedly mounted on the middle part of the front end of the workbench, a plug rod with a movable socket on the two fixed plates, a ball rotatably embedded in one end of the plug rod, a baffle and a spring fixedly mounted on the plug rod, and a pull ring fixedly mounted on the other end of the plug rod, wherein the baffle is located between the two fixed plates on the plug rod, the spring is sleeved on the plug rod, and both ends of the spring abut against a fixed plate and the baffle at the front end, and in the initial state, one end of the self-plug rod is inserted into the recessed hole, and abuts against the stop switch to trigger the workbench to stop working.

[0013] An efficient repair method based on laser cold welding, based on the repair device according to any one of claims 1 to 8, characterized in that it comprises the following steps:

[0014] S1: Surface pretreatment of the workpiece to be repaired to remove oil, rust and oxide layer;

[0015] S2: Design and prepare the filling material for repair according to the shape and size of the area to be repaired;

[0016] S3: Fix the workpiece to be repaired on the workbench, and adjust the position and angle of the laser head of the laser generator so that it is aligned with the area to be repaired;

[0017] S4: Start the laser generator to emit a laser beam to preheat the filling material and the area to be repaired;

[0018] S5: After preheating is completed, the power, scanning speed and scanning trajectory of the laser beam are controlled to achieve metallurgical bonding between the filling material and the area to be repaired;

[0019] S6: During the repair process, the temperature and deformation of the repair area are monitored in real time, and the laser parameters are adjusted according to the monitoring results;

[0020] S7: After the repair is completed, the repair area is ground and polished to make its surface roughness meet the requirements.

[0021] Preferably, before repair, the laser generator is started to emit a laser beam with a power of 500-1500W to preheat the filling material and the area to be repaired for 5-20s. During repair, the power of the laser beam is 800-2500W, the scanning speed is 3-10mm / s, and the scanning trajectory is one of a spiral, a broken line or a circle.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention utilizes a linear guide rail and an electric slider to enable the adjustment mechanism to drive the welding repair mechanism to perform left and right adjustment movements, thereby realizing the front and rear alignment of the welding repair mechanism with the position to be repaired. At the same time, the adjustment mechanism is composed of a combination of a transverse movement mechanism and a rotation mechanism, and the transverse movement mechanism and the rotation mechanism are linked by a synchronous wheel and a synchronous belt to realize rapid front and rear and angle adjustment, thereby greatly shortening the time required for adjusting the position.

[0024] 2. The present invention installs both the cooling mechanism and the adjusting mechanism by means of linear guides and electric sliders, and the water storage box designed for the cooling mechanism is connected to another mounting seat. When the left and right positions of the adjusting mechanism are adjusted, the cooling mechanism follows the adjusting mechanism and is adjusted synchronously, so that the cooling mechanism follows the adjusting mechanism and quickly reaches the area to be repaired and corresponds to the front and back of the repair area. Then, the universal joint tube is used for fine-tuning. At this time, the water storage box is placed just below the workpiece to receive cooling water for recycling. This not only eliminates the need for position adjustment of the cooling mechanism, but also realizes water recycling.

[0025] 3. The present invention uses the set self-locking mechanism to locate the initial position of the chuck. During repair, the concave hole added to the chuck is pulled out to rotate the chuck. At this time, the self-locking mechanism is released, so that the self-locking mechanism and the outer surface of the chuck are in sliding contact until the concave hole of the chuck overlaps with the self-locking mechanism again. At this time, one end of the self-locking mechanism is embedded in the concave hole again under the elastic force and contacts the trigger switch at the stop switch, thereby completing a circle of positioning and locking, so that the workbench and the welding repair mechanism stop working immediately, ensuring the accuracy of one circle of repair, and avoiding multiple welding and leaking welding to cause inconvenience to subsequent work. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0028] Figure 3 It is a schematic diagram of the structure of the regulating mechanism of the present invention.

[0029] Figure 4 It is a schematic diagram of the cooling mechanism structure of the present invention.

[0030] Figure 5 It is a schematic diagram of the installation structure of the self-locking mechanism of the present invention.

[0031] Figure 6 For the present invention Figure 5 Enlarged structural diagram at A in the middle.

[0032] The accompanying drawings are marked as follows: 1, base; 2, workbench; 3, chuck; 31, concave hole; 32, stop switch; 4, linear guide; 5, electric slider; 6, mounting seat; 7, adjustment mechanism; 71, lateral movement mechanism; 711, loading frame; 712, screw rod; 713, slide; 72, rotating mechanism; 721, U-shaped bracket; 722, vertical plate; 723, worm; 724, bearing; 725, rotating shaft; 726, turbine; 727, installation Frame; 73, synchronous wheel; 74, synchronous belt; 75, rotary handle; 8, welding repair mechanism; 81, laser generator; 82, feed head; 83, material pipe; 84, welding wire; 9, cooling mechanism; 91, water storage box; 92, water pump; 93, circulation pipe; 94, hard water pipe; 95, universal joint pipe; 10, self-locking mechanism; 101, fixing plate; 102, plug rod; 103, ball bearing; 104, baffle; 105, spring; 106, pull ring. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0034] The present invention provides an efficient repair device based on laser cold welding, such as Figure 1-4 As shown, it includes a base 1, a workbench 2 and a chuck 3, the workbench 2 is placed at the rear end of the base 1, and linear guides 4 are provided on the front and rear edges of the front end of the base 1, and an electric slider 5 is arranged on the linear guide 4, and a mounting seat 6 is installed on each of the two electric sliders 5, and an adjusting mechanism 7 is provided on the top surface of one of the mounting seats 6, and a welding repair mechanism 8 is detachably assembled on the top of the adjusting mechanism 7, wherein the adjusting mechanism 7 includes a transverse movement mechanism 71 and a rotating mechanism 72, and the tail ends of the output ends of the transverse movement mechanism 71 and the rotating mechanism 72 are both sleeved with a synchronous wheel 73, and the two synchronous wheels 73 are connected by a synchronous belt 74, and the heads of the output ends of the transverse movement mechanism 71 and the rotating mechanism 72 are both connected with a rotary handle 75, and rotating any one of the rotary handles 75 makes the transverse movement mechanism 71 and the rotating mechanism 72 operate synchronously, so as to realize the synchronous adjustment of the front and rear directions and angles of the welding repair mechanism 8.

[0035] The device uses a linear guide rail and an electric slider to enable the adjustment mechanism 7 to drive the welding repair mechanism 8 to perform left and right adjustment movements, so as to achieve the front and rear alignment of the welding repair mechanism 8 with the position to be repaired. At the same time, the adjustment mechanism 7 is composed of a combination of a transverse movement mechanism 71 and a rotating mechanism 72, and the transverse movement mechanism 71 and the rotating mechanism 72 are linked by a synchronous wheel 73 and a synchronous belt 74. When repairing a small-sized workpiece, one of the rotary handles 75 is turned to make the transverse movement mechanism 71 move backward, and the rotating mechanism 72 is driven by the synchronous wheel 73 and the synchronous belt 74, so that the rotating mechanism 72 drives the welding repair mechanism 8 to rotate downward, so that the distance and angle between the welding repair mechanism 8 and the workpiece are synchronously reduced. When repairing a large-sized workpiece, the transverse movement mechanism 71 moves forward, so that the rotating mechanism 72 drives the welding repair mechanism 8 to rotate upward, so that the distance and angle between the welding repair mechanism 8 and the workpiece are synchronously expanded, so that rapid front and rear adjustment and angle adjustment are achieved, which greatly shortens the time required for adjusting the position.

[0036] It also includes a cooling laser installed on another electric slider 5, wherein the cooling mechanism 9 includes a water storage box 91 installed between the two electric sliders 5, and a water pump 92 detachably installed on the other electric slider 5, one end of the water pump 92 is connected to a circulation pipe 93, and the end of the circulation pipe 93 extends to the inner bottom end of the water storage box 91, the other end of the water pump 92 is connected to a hard water pipe 94, and the top of the hard water pipe 94 is connected to a universal joint pipe 95.

[0037] The cooling mechanism 9 and the adjusting mechanism 7 are both installed by means of linear guides and electric sliders, and the water storage box 91 designed for the cooling mechanism 9 is connected to another mounting seat 6. When adjusting the left and right positions of the adjusting mechanism 7, the cooling mechanism 9 follows the adjusting mechanism 7 for synchronous adjustment, so that the cooling mechanism 9 follows the adjusting mechanism 7 to quickly reach the area to be repaired and correspond to the front and back of the repair area. Then, the universal joint tube 95 is used for fine-tuning. At this time, the water storage box 91 is placed just below the workpiece to receive cooling water for recycling. This not only eliminates the need for position adjustment of the cooling mechanism 9, but also realizes water recycling.

[0038] A self-locking mechanism 10 is elastically provided on one side of the front end of the workbench 2. A recessed hole 31 is provided at the corresponding position of the chuck 3 and the automatic mechanism, and a stop switch 32 is provided at the bottom. In the initial state, the rear end of the self-locking mechanism 10 is inserted into the recessed hole 31 and contacts the stop switch 32 to stop the workbench 2 from working.

[0039] The chuck is positioned at its initial position by using the self-locking mechanism 10. During repair, pull 10 out of the recessed hole added to the chuck 3 to rotate the chuck. At this time, the self-locking mechanism 10 is released, so that the self-locking mechanism 10 is in sliding contact with the outer surface of the chuck until the recessed hole of the chuck overlaps with the self-locking mechanism 10 again. At this time, one end of the self-locking mechanism 10 is embedded in the recessed hole again under the elastic force and contacts the trigger switch at the stop switch, thereby completing a circle of positioning and locking, causing the workbench and the welding repair mechanism 8 to stop working immediately, thereby ensuring the accuracy of one circle of repair and avoiding multiple welding and leaking welding to cause inconvenience to subsequent work.

[0040] The transverse movement mechanism 71 includes a loading frame 711 fixedly mounted on the electric slider 5, a screw rod 712 rotatably mounted in the loading frame 711, and a slide 713 slidably mounted inside the loading frame 711, wherein the slide 713 is a T-shaped structure, and the sliding bottom is slidably placed inside the loading frame 711 and threadedly sleeved on the screw rod 712.

[0041] Rotating one of the rotary handles 75 causes the screw rod 712 to rotate. Since the screw rod 712 is threadedly connected with the slide 713, the slide 713 can move in the front-to-back direction, thereby driving the rotating mechanism 72 on the top and the welding repair mechanism 8 to move in the front-to-back direction.

[0042] The rotating mechanism 72 includes a U-shaped bracket 721 fixedly mounted on the top of the slide 713, a vertical plate 722 fixedly mounted on the front and rear ends of the U-shaped bracket 721, a worm 723 rotatably mounted on the vertical plate 722, bearings 724 embedded in the tops of both ends of the U-shaped bracket, a rotating shaft 725 plugged into the two bearings 724, a turbine 726 fixedly mounted on the rotating shaft 725, and a mounting frame 727 fixedly mounted on one end of the rotating shaft 725, wherein the worm 723 and the turbine 726 are transmission-connected, and the mounting frame 727 is used to assemble the welding repair device.

[0043] The turbine 726 and the worm 723 are connected to achieve self-locking operation to prevent the welding repair mechanism 8 from bending downward due to gravity and causing position displacement. Rotate one of the handles 75 to rotate the worm 723, and the worm 723 drives the turbine 726 to rotate, so that the shaft runs and drives the welding repair mechanism 8 to rotate for handover adjustment.

[0044] The worm 723 and the lead screw 712 are in an upper and lower relationship. The front ends of the worm 723 and the lead screw 712 are fixedly connected with a rotary handle 75, and the rear ends of the worm 723 and the lead screw 712 are sleeved with a synchronous wheel 73, and the worm 723 and the synchronous wheel 73 on the lead screw 712 are connected through a synchronous belt 74. Rotating one of the rotary handles 75 can cause one of the lead screw 712 or the worm 723 to rotate, and the other worm 723 or the lead screw 712 can be driven to rotate synchronously through the connected synchronous wheel 73 and synchronous belt 74, thereby realizing the linkage adjustment between the transverse movement mechanism 71 and the rotation mechanism 72.

[0045] The welding repair mechanism 8 includes a mechanism welding gun detachably mounted on a mounting frame 727, a feed head 82 movably mounted at the bottom of one end of the mechanism welding gun, a feed pipe 83 connected to one end of the feed head 82, and a welding wire 84 is arranged in the feed pipe 83, one end of the welding wire 84 extends from the feed head 82 for cooperating with the laser generator 81 for welding repair.

[0046] The self-locking mechanism 10 includes two fixed plates 101 fixedly mounted at the middle of the front end of the workbench 2, an insert rod 102 with a movable socket on the two fixed plates 101, a ball 103 rotatably embedded in one end of the insert rod 102, a baffle 104 and a spring 105 fixedly mounted on the insert rod 102, and a pull ring 106 fixedly mounted on the other end of the insert rod 102, wherein the baffle is located between the two fixed plates 101 on the insert rod 102, the spring 105 is sleeved on the insert rod 102, and both ends of the spring 105 are in contact with a fixed plate 101 at the front end and the baffle. In the initial state, one end of the self-insertion rod 102 is inserted into the recessed hole, and abuts against the stop switch to trigger the workbench 2 to stop working.

[0047] In the initial state, under the elastic force of the spring 105, one end of the rod 102 is inserted into the recessed hole 31. During repair, the pull ring 106 is pulled to pull the rod 102 out of the recessed hole 31. At this time, the device is started, and then the pull ring 106 is loosened. Under the action of the spring 105, one end of the rod 102 moves toward the chuck 3 and makes the ball 103 abut against the chuck 3 and slide with the chuck 3. After the chuck 3 rotates one circle, one end of the rod 102 is inserted into the recessed hole 31 and contacts the trigger switch at the stop switch 32, thereby completing one circle of positioning and locking, so that the workbench and the welding repair mechanism 8 stop working immediately, ensuring the accuracy of one circle of repair and avoiding multiple welding and leaking welding to cause inconvenience to subsequent work.

[0048] An efficient repair method based on laser cold welding comprises the following steps:

[0049] S1: Surface pretreatment of the workpiece to be repaired to remove oil, rust and oxide layer;

[0050] S2: Design and prepare the filling material for repair according to the shape and size of the area to be repaired;

[0051] S3: Fix the workpiece to be repaired on the workbench, and adjust the position and angle of the laser head of the laser generator so that it is aligned with the area to be repaired;

[0052] S4: Start the laser generator to emit a laser beam to preheat the filling material and the area to be repaired;

[0053] S5: After preheating is completed, the power, scanning speed and scanning trajectory of the laser beam are controlled to achieve metallurgical bonding between the filling material and the area to be repaired;

[0054] S6: During the repair process, the temperature and deformation of the repair area are monitored in real time, and the laser parameters are adjusted according to the monitoring results;

[0055] S7: After the repair is completed, the repair area is ground and polished to make its surface roughness meet the requirements.

[0056] Before repair, start the laser generator and emit a laser beam with a power of 500-1500W to preheat the filling material and the area to be repaired for 5-20s. During repair, the power of the laser beam is 800-2500W, the scanning speed is 3-10mm / s, and the scanning trajectory is one of spiral, broken line or circle.

[0057] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0058] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. An efficient repair device based on laser cold welding, comprising a base (1), a workbench (2) and a chuck (3), characterized in that: The workbench (2) is placed at the rear end of the base (1). The front and rear edges of the front end of the base (1) are both provided with linear guide rails (4), and the linear guide rails (4) are provided with electric sliders (5). A mounting seat (6) is respectively installed on the two electric sliders (5). An adjustment mechanism (7) is provided on the top surface of one of the mounting seats (6). A welding repair mechanism (8) is detachably mounted on the top of the adjustment mechanism (7). The adjustment mechanism (7) includes a transverse movement mechanism (71) and a rotation mechanism (72). The tails of the output ends of the transverse movement mechanism (71) and the rotation mechanism (72) are both sleeved with a synchronous wheel (73). The two synchronous wheels (73) are connected by a synchronous belt (74). The heads of the output ends of the transverse movement mechanism (71) and the rotation mechanism (72) are both connected with a rotary handle (75). Rotating any one of the rotary handles (75) causes the transverse movement mechanism (71) and the rotation mechanism (72) to operate synchronously, thereby realizing synchronous adjustment of the front and rear ends and the angle of the welding repair mechanism (8).

2. According to claim 1, a high-efficiency repair device based on laser cold welding is characterized in that: It also includes a cooling laser installed on another electric slider (5), wherein the cooling mechanism (9) includes a water storage box (91) installed between the two electric sliders (5), and a water pump (92) detachably installed on the other electric slider (5), one end of the water pump (92) is connected to a circulation pipe (93), and the end of the circulation pipe (93) extends to the inner bottom end of the water storage box (91), the other end of the water pump (92) is connected to a hard water pipe (94), and the top of the hard water pipe (94) is connected to a universal joint pipe (95).

3. According to claim 1, a highly efficient repair device based on laser cold welding is characterized in that: A self-locking mechanism (10) is elastically provided on one side of the front end of the workbench (2); a concave hole is provided at a position corresponding to the automatic mechanism of the chuck (3); a stop switch is provided at the bottom of the concave hole; in an initial state, the rear end of the self-locking mechanism (10) is inserted into the concave hole and contacts the stop switch to stop the workbench (2).

4. According to claim 1, a highly efficient repair device based on laser cold welding is characterized in that: The transverse movement mechanism (71) comprises a loading frame (711) fixedly mounted on the electric slider (5), a screw rod (712) rotatably mounted in the loading frame (711), and a slide table (713) slidably mounted inside the loading frame (711), wherein the slide table (713) is in a T-shaped structure, and the sliding bottom is slidably placed inside the loading frame (711) and is threadedly sleeved on the screw rod (712).

5. According to claim 1, a highly efficient repair device based on laser cold welding is characterized in that: The rotating mechanism (72) comprises a U-shaped bracket (721) fixedly mounted on the top of the slide (713), a vertical plate (722) fixedly mounted at the front and rear ends of the U-shaped bracket (721), a worm (723) rotatably mounted on the vertical plate (722), bearings (724) embedded and mounted on the tops of both ends of the U-shaped bracket, a rotating shaft (725) plugged into the two bearings (724), a turbine (726) fixedly mounted on the rotating shaft (725), and a mounting frame (727) fixedly mounted on one end of the rotating shaft (725), wherein the worm (723) and the turbine (726) are transmission-connected, and the mounting frame (727) is used to assemble the welding repair device.

6. The high-efficiency repair device based on laser cold welding according to claim 6 is characterized in that: The worm (723) and the screw (712) are in a vertically opposed relationship, the front ends of the worm (723) and the screw (712) are fixedly connected with a rotary handle (75), the rear ends of the worm (723) and the screw (712) are sleeved with a synchronous wheel (73), and the worm (723) and the synchronous wheel (73) on the screw (712) are connected by a synchronous belt (74).

7. The high-efficiency repair device based on laser cold welding according to claim 1 is characterized in that: The welding repair mechanism (8) comprises a mechanism welding gun detachably mounted on a mounting frame (727), a feed head (82) movably mounted at the bottom of one end of the mechanism welding gun, and a feed pipe (83) connected to one end of the feed head (82), wherein a welding wire (84) is arranged in the feed pipe (83), and one end of the welding wire (84) extends from the feed head (82) for cooperating with a laser generator (81) for welding repair.

8. The high-efficiency repair device based on laser cold welding according to claim 1 is characterized in that: The self-locking mechanism (10) comprises two fixed plates (101) fixedly mounted on the middle of the front end of the workbench (2), a plug rod (102) with a movable socket on the two fixed plates (101), a ball (103) rotatably embedded in one end of the plug rod (102), a baffle (104) and a spring (105) fixedly mounted on the plug rod (102), and a pull ring (106) fixedly mounted on the other end of the plug rod (102), wherein the baffle is located between the two fixed plates (101) on the plug rod (102), the spring (105) is sleeved on the plug rod (102), and the two ends of the spring (105) abut against a fixed plate (101) and the baffle at the front end, and in the initial state, one end of the self-plug rod (102) is inserted into the concave hole and abuts against the stop switch to trigger the workbench (2) to stop working.

9. An efficient repair method based on laser cold welding, based on the repair device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Surface pretreatment of the workpiece to be repaired to remove oil, rust and oxide layer; S2: Design and prepare the filling material for repair according to the shape and size of the area to be repaired; S3: Fix the workpiece to be repaired on the workbench, and adjust the position and angle of the laser head of the laser generator so that it is aligned with the area to be repaired; S4: Start the laser generator to emit a laser beam to preheat the filling material and the area to be repaired; S5: After preheating is completed, the power, scanning speed and scanning trajectory of the laser beam are controlled to achieve metallurgical bonding between the filling material and the area to be repaired; S6: During the repair process, the temperature and deformation of the repair area are monitored in real time, and the laser parameters are adjusted according to the monitoring results; S7: After the repair is completed, the repair area is ground and polished to make its surface roughness meet the requirements.

10. The efficient repair method based on laser cold welding according to claim 9, characterized in that: Before repair, start the laser generator and emit a laser beam with a power of 500-1500W to preheat the filling material and the area to be repaired for 5-20s. During repair, the power of the laser beam is 800-2500W, the scanning speed is 3-10mm / s, and the scanning trajectory is one of spiral, broken line or circle.

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