A welding device for machining a crankshaft of a single-cylinder air-cooled two-roller diesel engine

Abstract

The application relates to a welding device for machining a crankshaft of a single-cylinder air-cooled double-roller diesel engine, and belongs to the technical field of welding machining. The device comprises a body, a servo motor one is arranged on one side of the body, a machining bin is formed in the front end of the body, supporting blocks are arranged on the inside of the machining bin, a brake disc is arranged on the inside of the left supporting block, the brake disc is fixedly connected with the output end of the servo motor one, a three-jaw chuck is arranged on the inside of the brake disc, servo motors two are arranged on the upper and lower ends of the left supporting block, a screw rod one is arranged on the output end of the servo motor two, a sliding block is threadedly connected with the outer wall of the screw rod one, and a limiting frame is arranged on the outside of the sliding block. The detection assembly is arranged, so that the camera two closely collects fine cracks, rust and local defects of a curve surface of the crankshaft by abutting against the obstacle wheel one; meanwhile, the concave lens is matched with the flexible lamp strip to uniformly project soft light on the crankshaft, so that the shadow at the crank and the journal is eliminated.

Description

Technical Field

[0001] This invention relates to the field of welding processing technology, and in particular to a welding device for machining crankshafts of single-cylinder air-cooled double-roll diesel engines. Background Technology

[0002] Single-cylinder air-cooled twin-roll diesel engines are widely used in agricultural machinery, small construction machinery, generator sets and other fields. The crankshaft, as the core load-bearing component of the diesel engine, is subjected to alternating bending and torsional loads for a long time. After long-term service, it is prone to defects such as journal wear, surface corrosion, micro-cracks and impact damage. Replacing the crankshaft directly with a brand new one is costly. The industry generally adopts welding and overlay repair process to remanufacture and repair damaged crankshafts, thereby reducing equipment maintenance costs and improving the recycling rate of parts.

[0003] Because crankshafts accumulate oil sludge, metal dust, rust, and oxide scale on their working surfaces over long periods, existing welding equipment relies solely on manual, point-to-point cleaning with handheld air guns, resulting in extremely low automation. Furthermore, conventional fixed air-blowing structures cannot conform to the irregular curved surfaces of crankshafts, making it difficult to thoroughly clean hard-to-reach areas such as journals and crankshaft transition fillets. This allows residual dust and oxide layers to enter the molten pool during welding, leading to welding defects such as porosity and slag inclusions, significantly reducing weld strength. Additionally, traditional cleaning processes lack real-time visual monitoring, making it impossible to directly assess surface cleanliness. Relying solely on operator judgment can easily result in inadequate cleaning before proceeding to the welding stage, making it difficult to reduce the scrap rate.

[0004] Therefore, this application provides a welding apparatus for machining crankshafts of single-cylinder air-cooled twin-roll diesel engines to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a solution to the problems of existing crankshaft welding and repair processing equipment, such as incomplete pre-welding cleaning, low defect detection accuracy, easy displacement of welded workpieces, dispersed process and low degree of automation, and insufficient adaptive operation capability of curved surfaces, which seriously affect the processing quality and production efficiency of single-cylinder air-cooled diesel engine crankshaft welding and repair.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A welding device for machining crankshafts of a single-cylinder air-cooled twin-roll diesel engine includes a main body. A servo motor is mounted on one side of the main body. A machining chamber is located at the front end of the main body. Support blocks are mounted on both sides inside the machining chamber. A brake disc is mounted on the inner side of the left support block and is fixedly connected to the output end of the servo motor. A three-jaw chuck is mounted inside the brake disc. Servo motors are mounted at the upper and lower ends of the left support block. A screw is mounted on the output end of the servo motor. A slider is threaded onto the outer wall of the screw, and a limit bracket is mounted on the outer side of the slider. A camera is mounted on the top of the machining chamber, and a robotic arm is mounted on the inner wall of the end of the machining chamber. A detection component is mounted on the top of the lower slider for detecting the crankshaft surface. A dust removal component is mounted on the bottom of the upper slider for blowing away dust from the crankshaft surface. An anti-deviation component is mounted on the top of the brake disc to prevent the crankshaft from shifting during welding.

[0007] Optionally, the detection component includes a support shell, the bottom of which is mounted on the top of the lower slider. An electric telescopic rod is mounted on the inner wall of the bottom of the support shell, and a movable ring is mounted on the output end of the electric telescopic rod.

[0008] Optionally, connecting rods are installed on both sides of the front end of the movable ring, a movable block is installed at the other end of the connecting rod, and a support rod is installed on the top of the movable block away from the support shell.

[0009] Optionally, a rotating rod is installed on the top of the support rod, an obstacle avoidance wheel is installed on the top of the rotating rod, and a camera is installed on the side of the obstacle avoidance wheel near the support shell.

[0010] Optionally, a concave lens is installed on the outer wall of the support rod, the other end of the concave lens is installed on the top of the support shell, a flexible light strip is installed at the bottom of the concave lens, and a camera is installed at the center of the top of the support shell.

[0011] Optionally, the dust removal assembly includes a second support shell, the top of which is mounted on the bottom of the upper slider, and an electric telescopic rod is mounted on the inner wall of the top of the second support shell. A movable ring is mounted on the output end of the electric telescopic rod.

[0012] Optionally, connecting rods 2 are installed on both sides of the front end of the movable ring 2, and a moving block 2 is installed on the other end of the connecting rod 2. A support rod 2 is installed at the bottom of the moving block 2 on the side away from the support shell 2, and a rotating rod 2 is installed at the bottom of the support rod 2.

[0013] Optionally, air vents are installed on both sides of the outer wall of the rotating rod 2, obstacle avoidance wheels 2 are installed at the bottom of the rotating rod 2, and a camera 4 is installed at the center of the bottom of the support shell 2.

[0014] Optionally, the anti-deviation component includes a support frame, one side of which is mounted on the side wall of the support block. A servo motor three is mounted on the top of the support frame on the side away from the support block, and a screw two is mounted on the bottom output end of the servo motor three.

[0015] Optionally, the outer wall of the screw is threaded with a screw barrel, a movable ring three is installed at the bottom of the screw barrel, a connecting rod three is installed on both sides of the front end of the movable ring three, a clamping block is installed at the other end of the connecting rod three, and a brake pad is installed on the side of the clamping block near the brake disc. The brake pad is made of ceramic material so as to enable long-term braking of the brake disc. The brake disc is made of gray cast iron material so as to facilitate smooth braking friction and low noise.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a dust removal component, the electric telescopic rod 2 drives the connecting rod 2 to open or tighten the two sets of support rods 2, thereby causing the support rod 2 to drive the rotating rod 2 and the obstacle avoidance wheel 2 to move. At the same time, when the obstacle avoidance wheel 2 contacts the crankshaft obstruction, it can drive the rotating rod 2 to rotate, so that the obstacle avoidance wheel 2 and the rotating rod 2 can fit the irregular curved surface of the crankshaft. Then, the air outlets on both sides spray high-pressure airflow while the crankshaft rotates in the circumferential direction, ensuring that the workpiece can be completely blown away by the air outlets, and can blow away oil sludge, metal dust and oxide scale.

[0017] By setting up a detection component, the operation of the electric telescopic rod 1 drives the connecting rod 1 to open or tighten the two sets of support rods 1, thereby causing the camera 2 and the obstacle avoidance wheel 1 to move with the support rods and the rotating rod 1. At the same time, when the obstacle avoidance wheel 1 contacts the crankshaft obstruction, the obstacle avoidance wheel 1 can drive the camera 2 and the rotating rod 1 to rotate, so that the camera 2 follows the obstacle avoidance wheel 1 to closely collect fine cracks, corrosion, and local defects caused by impacts on the curved surface of the crankshaft. The camera 4 is installed on the support shell 2, so that the camera 4 can move with the support shell 2 to collect images of the workpiece surface in real time. The system automatically judges the cleanliness to avoid the formation of porosity and slag inclusions due to impurities entering the molten pool, thereby effectively improving the weld bonding strength and reducing the welding scrap rate. At the same time, the concave lens and the flexible light strip project soft light evenly onto the curved surface of the crankshaft to eliminate shadows at the crank and journal. The opening range of the two sets of support rods can be adjusted by the electric telescopic rod 1 and the connecting rod 1 to adapt to the crankshafts of different specifications of single-cylinder air-cooled double-roll diesel engines, replacing the traditional subjective judgment by human eyes, and significantly reducing the rate of missed and false defects.

[0018] By setting up an anti-deviation component, the servo motor drives the screw two to move the screw barrel and the movable ring three, thereby causing the connecting rod three to push the clamping blocks on both sides to clamp the brake disc synchronously. In conjunction with the three-jaw chuck, the crankshaft displacement is double-constrained to counteract the workpiece movement caused by the high temperature thermal deformation during welding and the impact force of the robotic arm welding gun. This prevents weld seam deviation and uneven weld layer thickness, ensuring the dimensional accuracy of the weld repair, improving the dynamic balance performance of the crankshaft after repair, and extending the service life of the repaired crankshaft. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of the welding device for machining the crankshaft of a single-cylinder air-cooled double-roll diesel engine; Figure 2 This is a schematic cross-sectional view of the internal structure of the processing chamber; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional structural diagram of the main body, support block, servo motor 2, screw 1, slider, limit frame, detection component and dust removal component; Figure 5 This is a schematic diagram of the component structure for testing; Figure 6 A schematic diagram of the cross-sectional disassembly structure of the inspection component; Figure 7 This is a schematic diagram of the dust removal component structure; Figure 8 This is a schematic diagram of the disassembled cross-section of the dust removal component; Figure 9 A schematic diagram of the brake disc, three-jaw chuck, and anti-deviation assembly; Figure 10 A schematic diagram of the cross-sectional structure of the component to prevent displacement.

[0020] Figure label: 1. Main body; 101. Servo motor one; 102. Machining chamber; 103. Support block; 104. Brake disc; 105. Three-jaw chuck; 106. Servo motor two; 107. Screw one; 108. Slider; 109. Limiting frame; 110. Camera one; 111. Robotic arm; 2. Detection components; 201. Support shell one; 202. Electric telescopic rod one; 203. Movable ring one; 204. Connecting rod one; 205. Moving block one; 206. Support rod one; 207. Rotating rod one; 208. Obstacle avoidance wheel one; 209. Camera two; 210. Concave 211. Shaped lens; 212. Flexible light strip; 213. Camera 3; 3. Dust removal assembly; 301. Support shell 2; 302. Electric telescopic rod 2; 303. Movable ring 2; 304. Link 2; 305. Moving block 2; 306. Support rod 2; 307. Rotating rod 2; 308. Air outlet; 309. Obstacle avoidance wheel 2; 310. Camera 4; 4. Anti-deviation assembly; 401. Support frame; 402. Servo motor 3; 403. Screw 2; 404. Screw barrel; 405. Movable ring 3; 406. Link 3; 407. Clamping block; 408. Brake pad. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0022] like Figures 1 to 10As shown, an embodiment of the present invention provides a welding device for machining crankshafts of a single-cylinder air-cooled double-roll diesel engine, including a main body 1, which is an enclosed cabinet structure with adjustable support feet at the bottom for easy leveling on site. A servo motor 101 is installed on one side of the main body 1. A machining chamber 102 is opened at the front end of the main body 1. The enclosed space can block welding sparks and dust from escaping, improving operational safety. Support blocks 103 are installed on both sides inside the machining chamber 102. A brake disc 104 is installed inside the left support block 103. The brake disc 104 is fixedly connected to the output end of the servo motor 101. A three-jaw chuck 105 is installed inside the brake disc 104. The servo motor 101 can drive the brake disc 104, the three-jaw chuck 105, and the crankshaft to rotate synchronously at a constant speed of 360°, which is suitable for all-round surface cleaning, defect photography, and welding operations. Servo motors 106 are installed at the upper and lower ends of the left support block 103. A screw 107 is installed at the output end of the 06. A slider 108 is threadedly connected to the outer wall of the screw 107. A limit frame 109 is installed on the outer side of the slider 108. The limit frame 109 is used to restrict the slider 108 to only move linearly along the axial direction of the screw 107, preventing the slider 108 from deflecting and getting stuck. A camera 110 is installed on the top of the processing chamber 102. A robotic arm 111 is installed on the inner wall of the end of the processing chamber 102. The end of the robotic arm 111 is equipped with a plasma welding torch, which can receive system defect coordinate data and automatically plan the welding trajectory to complete the welding repair of crankshaft wear and crack areas. A detection component 2 is installed on the top of the lower slider 108. The detection component 2 is used to detect the surface of the crankshaft. A dust removal component 3 is installed on the bottom of the upper slider 108. The dust removal component 3 is used to blow away dust from the surface of the crankshaft. An anti-deviation component 4 is installed on the top of the brake disc 104. The anti-deviation component 4 is used to prevent the crankshaft from moving during welding.

[0023] like Figures 1 to 6As shown, the detection assembly 2 includes a support shell 201. The bottom of the support shell 201 is mounted on the top of the lower slider 108. An electric telescopic rod 202 is installed on the inner wall of the bottom of the support shell 201. A movable ring 203 is installed at the output end of the electric telescopic rod 202. Connecting rods 204 are installed on both sides of the front end of the movable ring 203. A moving block 205 is installed at the other end of the connecting rod 204. When the electric telescopic rod 202 extends or retracts, it can push the movable ring 203 to move up and down. This allows the moving blocks 205 on both sides to be simultaneously opened outward or retracted inward through the connecting rods 204, thereby adjusting the distance between the two sets of detection mechanisms to adapt to crankshafts of single-cylinder air-cooled double-roll diesel engines with different shaft diameters. A support rod 206 is installed on the top of the side of the moving block 205 away from the support shell 201. A rotating rod 207 is installed on the top of the support rod 206. An obstacle avoidance wheel 208 is installed on the top of the rotating rod 207. When obstacle avoidance wheel 208 comes into contact with an object, it can cause rotating rod 207 to adaptively deflect. Camera 209 is installed on the side of obstacle avoidance wheel 208 near support shell 201. A concave lens 210 is installed on the outer wall of support rod 206. The concave lens 210 is made of flexible material and can move with support rod 206 to adjust the light emission range. The other end of the concave lens 210 is installed on the top of support shell 201. A flexible light strip 211 is installed at the bottom of the concave lens 210. The flexible light strip 211 is made of flexible material and can move with support rod 206 to adjust the light illumination angle. The soft light emitted by the flexible light strip 211 is diffusely reflected by the concave lens 210 and evenly covers the crankshaft surface, eliminating the shadows caused by the concave and convex structure of the crank and improving the image recognition accuracy. Camera 3 212 is installed at the center of the top of support shell 201 for close-range acquisition of images of minor defects in crankshaft cranks and journal fillets.

[0024] like Figures 7 to 8 As shown, the dust removal assembly 3 includes a second support shell 301. The top of the second support shell 301 is mounted on the bottom of the upper slider 108. An electric telescopic rod 302 is mounted on the inner wall of the top of the second support shell 301. A movable ring 303 is mounted on the output end of the electric telescopic rod 302. Connecting rods 304 are mounted on both sides of the front end of the movable ring 303. A movable block 305 is mounted on the other end of the connecting rod 304. The extension and retraction of the electric telescopic rod 302 can synchronously adjust the opening and closing amplitude of the two support rods 306 to match the outer diameter of the crankshaft. The movable block 305 is moved away from the second support shell 301. 01 A support rod 2 306 is installed at the bottom of one side. A rotating rod 2 307 is installed at the bottom of the support rod 2 306. Air outlets 308 are installed on both sides of the outer wall of the rotating rod 2 307. The rotating rod 2 307 is hollow inside and connected to a high-pressure air source. The airflow is sprayed from the air outlets 308 onto the surface of the crankshaft. A barrier avoidance wheel 2 309 is installed at the bottom of the rotating rod 2 307. The barrier avoidance wheel 2 309 can drive the rotating rod 2 307 to deflect adaptively, ensuring that dead corners such as the transition radius of the crank and the bottom of the journal can be covered by the airflow. A camera 4 310 is installed at the center of the bottom of the support shell 2 301.

[0025] like Figures 9 to 10 As shown, the anti-deviation component 4 includes a support frame 401. One side of the support frame 401 is mounted on the side wall of the support block 103. A servo motor 402 is mounted on the top of the side of the support frame 401 away from the support block 103. A screw 403 is mounted on the bottom output end of the servo motor 402. A screw cylinder 404 is threadedly connected to the outer wall of the screw cylinder 403. A movable ring 405 is mounted on the bottom of the screw cylinder 404. Connecting rods 406 are mounted on both sides of the front end of the movable ring 405. A clamping block 407 is mounted on the other end of the connecting rod 406. A clamping block 407 is mounted on the side of the clamping block 407 near the brake disc 104. The brake pad 408 is made of ceramic to ensure long-term braking of the brake disc 104. The brake disc 104 is made of gray cast iron to ensure smooth braking friction and low noise. The servo motor 402 drives the screw 403 to rotate, which in turn drives the screw barrel 404 and the movable ring 405 to move. This causes the connecting rod 406 to drive the clamping block 407 and the brake pad 408 to clamp or release the brake disc 104, thereby braking the brake disc 104 with the brake pad 408 to prevent the workpiece from moving due to the high temperature of welding and the impact of the welding torch.

[0026] The working principle of the technical solution provided by this invention is as follows: The crankshaft to be welded is sent into the machining chamber 102 and placed between the two support blocks 103. Then, the servo motor 101 drives the brake disc 104 to rotate, and the three-jaw chuck 105 simultaneously completes the centering clamping of one end of the crankshaft, realizing the radial basic positioning of the crankshaft.

[0027] Subsequently, the servo motor 106 above the left support block 103 synchronously drives the screw 107 to rotate. The screw 107 drives the matching slider 108 to move along the horizontal guide rail. At the same time, the limit frame 109 constrains the slider 108 to move in a straight line to prevent deviation. Then, the electric telescopic rod 302 moves down or up, driving the movable ring 303 to move. The movable ring 303 pushes the connecting rods 304 on both sides to open or tighten the moving block 305. Then, it drives the support rod 306 to fit against the outer wall of the crankshaft. At this time, the air outlets 308 on both sides of the rotating rod 307 continuously spray high-pressure airflow, which moves with the axial movement of the component, and at the same time, it cooperates with the servo motor 101 to drive the... The brake disc 104 and the three-jaw chuck 105 rotate, thereby rotating the crankshaft to blow away the dust on the crankshaft surface. Then, the camera 310 at the bottom of the support housing 301 simultaneously collects images of the dust-cleaning area and provides real-time feedback on the surface cleanliness. In addition, when the slider 108 moves the dust-cleaning assembly 3, the obstacle avoidance wheel 309 comes into contact with the crankshaft and drives the rotating rod 307 to rotate, ensuring that the air outlet 308 can work normally and can also blow away the bottom of the crankshaft. After the dust cleaning is completed, the electric telescopic rod 302 retracts, and then the servo motor 106 drives the screw 107 to rotate. The screw 107 drives the matching slider 108 to move, so that the dust-cleaning assembly 3 is reset.

[0028] After the dust removal process is completed, the servo motor 106 below the left support block 103 synchronously drives the screw 107 to rotate, causing the slider 108 to move the detection component 2 along the crankshaft axis. Subsequently, the electric telescopic rod 202 moves up or down, causing the movable ring 203 to drive the connecting rod 204 to open or tighten the two sets of moving blocks 205, causing the support rod 206 to move to both sides of the crankshaft, so that the obstacle avoidance wheel 208 at the top of the rotating rod 207 fits against the crankshaft surface. At this time, the camera 209 follows the obstacle avoidance wheel 208 to move along the crankshaft surface, collecting close-up images of minor cracks, bumps, and rust defects on the side of the crankshaft. At the same time, the moving block 205 drives the bottom flexible light strip 211 to move evenly towards the concave lens. 210 projects soft light onto the crankshaft surface to eliminate surface shadows and improve image clarity. In addition, the camera 212 at the top center of the support shell 201 captures the overall outline of the crankshaft from top to bottom. Combined with close-up shots from the camera 209 and the camera 212, complete crankshaft surface image data is generated and transmitted to the control system to identify defects. When the slider 108 moves the detection component 2, the obstacle avoidance wheel 208 comes into contact with the crankshaft and drives the rotating rod 207 to rotate, allowing the camera 209 to tilt and capture the inner surface of the crankshaft. After the inspection is completed, the servo motor 106 drives the screw 107 to rotate, causing the slider 108 to retract the detection component 2 to avoid the welding station.

[0029] Subsequently, the anti-deviation component 4 operates, and the servo motor 3 402 drives the screw 2 403 to rotate, causing the screw 2 403 to drive the screw barrel 404 and the movable ring 3 405 to move, thereby causing the connecting rod 3 406 to drive the clamping block 407 and the brake pad 408 to clamp the brake disc 104 to avoid the workpiece from moving due to the high temperature of welding and the impact of the welding gun; then the robotic arm 111 at the end of the processing chamber 102 is equipped with a welding gun, and moves along the preset trajectory to perform welding according to the crankshaft size and weld position data collected in the early stage.

[0030] After all welding processes for a single crankshaft are completed, the robotic arm 111 drives the welding torch to return to the initial standby position along the guide rail. Then, the servo motor 3 402 rotates in the opposite direction, causing the screw 2 403 to drive the screw barrel 404 upward, which allows the clamping block 407 and brake pad 408 to release the brake disc 104. Then, the three-jaw chuck 105 releases the workpiece, and the operator can take out the finished crankshaft. After that, the equipment enters the standby state for processing the next crankshaft.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A welding apparatus for machining crankshafts of a single-cylinder air-cooled double-roll diesel engine, characterized in that, The system includes a main body (1), a servo motor (101) is installed on one side of the main body (1), a processing chamber (102) is opened at the front end of the main body (1), support blocks (103) are installed on both sides inside the processing chamber (102), a brake disc (104) is installed on the inner side of the support block (103) on the left side, the brake disc (104) is fixedly connected to the output end of the servo motor (101), a three-jaw chuck (105) is installed on the inner side of the brake disc (104), a servo motor (106) is installed at the upper and lower ends of the support block (103) on the left side, a screw (107) is installed at the output end of the servo motor (106), a slider (108) is threaded to the outer wall of the screw (107), a limit frame (109) is installed on the outer side of the slider (108), a camera (110) is installed on the top of the processing chamber (102), and a robotic arm (111) is installed on the inner wall of the end of the processing chamber (102). The lower slider (108) is equipped with a detection component (2) on its top, which is used to detect the crankshaft surface; The upper slider (108) is equipped with a dust removal component (3) at the bottom, which is used to blow away dust from the crankshaft surface; The brake disc (104) is equipped with an anti-deviation component (4) on top, which is used to prevent the crankshaft from moving during welding.

2. The welding apparatus for machining crankshafts of a single-cylinder air-cooled twin-roll diesel engine according to claim 1, characterized in that, The detection component (2) includes a support shell (201), the bottom of which is installed on the top of the lower slider (108). An electric telescopic rod (202) is installed on the inner wall of the bottom of the support shell (201), and a movable ring (203) is installed at the output end of the electric telescopic rod (202).

3. The welding apparatus for machining crankshafts of a single-cylinder air-cooled twin-roll diesel engine according to claim 2, characterized in that, Connecting rods (204) are installed on both sides of the front end of the movable ring (203), and a moving block (205) is installed on the other end of the connecting rod (204). A support rod (206) is installed on the top of the moving block (205) on the side away from the support shell (201).

4. The welding apparatus for machining crankshafts of a single-cylinder air-cooled double-roll diesel engine according to claim 3, characterized in that, The top of the support rod (206) is equipped with a rotating rod (207), the top of the rotating rod (207) is equipped with an obstacle avoidance wheel (208), and the obstacle avoidance wheel (208) is equipped with a camera (209) on the side of the support shell (201).

5. The welding apparatus for machining crankshafts of a single-cylinder air-cooled twin-roll diesel engine according to claim 3, characterized in that, A concave lens (210) is installed on the outer wall of the support rod (206). The other end of the concave lens (210) is installed on the top of the support shell (201). A flexible light strip (211) is installed at the bottom of the concave lens (210). A camera (212) is installed at the center of the top of the support shell (201).

6. The welding apparatus for machining crankshafts of a single-cylinder air-cooled twin-roll diesel engine according to claim 1, characterized in that, The dust removal component (3) includes a second support shell (301), the top of which is installed on the bottom of the upper slider (108). An electric telescopic rod (302) is installed on the inner wall of the top of the second support shell (301), and a movable ring (303) is installed at the output end of the electric telescopic rod (302).

7. The welding apparatus for machining crankshafts of a single-cylinder air-cooled twin-roll diesel engine according to claim 6, characterized in that, Connecting rods 2 (304) are installed on both sides of the front end of the movable ring 2 (303). A moving block 2 (305) is installed at the other end of the connecting rod 2 (304). A support rod 2 (306) is installed at the bottom of the moving block 2 (305) on the side away from the support shell 2 (301). A rotating rod 2 (307) is installed at the bottom of the support rod 2 (306).

8. The welding apparatus for machining crankshafts of a single-cylinder air-cooled twin-roll diesel engine according to claim 7, characterized in that, Air outlets (308) are installed on both sides of the outer wall of the rotating rod two (307), obstacle avoidance wheel two (309) is installed at the bottom of the rotating rod two (307), and camera four (310) is installed at the center of the bottom of the support shell two (301).

9. The welding apparatus for machining crankshafts of a single-cylinder air-cooled twin-roll diesel engine according to claim 1, characterized in that, The anti-deviation component (4) includes a support frame (401), one side of which is mounted on the side wall of the support block (103). A servo motor (402) is mounted on the top of the side of the support frame (401) away from the support block (103), and a screw (403) is mounted on the bottom output end of the servo motor (402).

10. The welding apparatus for machining crankshafts of a single-cylinder air-cooled twin-roll diesel engine according to claim 9, characterized in that, The screw 2 (403) is threaded to the outer wall of the screw barrel (404). The bottom of the screw barrel (404) is equipped with a movable ring 3 (405). The front ends of the movable ring 3 (405) are equipped with connecting rod 3 (406). The other end of the connecting rod 3 (406) is equipped with a clamping block (407). The clamping block (407) is equipped with a brake pad (408) on the side near the brake disc (104). The brake pad (408) is made of ceramic material so that it can brake the brake disc (104) for a long time. The brake disc (104) is made of gray cast iron material so that the braking friction is smooth and the noise is low.

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