An ultrasonic-assisted laser cladding apparatus

Abstract

The application discloses an ultrasonic-assisted laser cladding device and relates to the technical field of laser cladding.The device comprises a mounting table, a turnover self-rotation mechanism and a cladding forging mechanism.The turnover self-rotation mechanism is arranged above the mounting table in a left-right symmetrical mode and comprises a motor one.The motor one drives the clamped crankshaft to rotate around the central axis of the connecting rod journal, and the motor one drives the crankshaft of the cross arm to rotate around the central axis of the main journal.The cladding forging mechanism is arranged above the pair of turnover self-rotation mechanisms and comprises a motor two, a laser cladding head and an ultrasonic forging head.The motor two drives the laser cladding head and the ultrasonic forging head to move along the axial direction of the crankshaft, the laser cladding head performs laser cladding on the surface of the connecting rod journal to form a cladding layer, and the ultrasonic forging head performs ultrasonic-assisted forging on the cladding layer after electromagnetic induction heating.The device has the characteristics of reasonable scheme design, ingenious structure and compactness.

Description

Technical Field

[0001] This invention relates to the technical field of laser cladding, and more specifically to an ultrasonic-assisted laser cladding device. Background Technology

[0002] Laser cladding, also known as laser welding or laser coating, is a novel surface modification technology. It involves adding a cladding material to the surface of a substrate and then using a high-energy-density laser beam to fuse the material with a thin layer on the substrate surface, thus forming a metallurgically bonded cladding layer.

[0003] Currently, when using laser cladding to repair crankshaft connecting rod journals, the rapid heating of the laser beam completely melts the metal powder. The heat cannot be transferred quickly enough, resulting in a substrate temperature far lower than the cladding layer temperature. This creates a large temperature gradient between the cladding and substrate materials. During the subsequent rapid solidification process, there is insufficient liquid to replenish the gradient. This temperature gradient difference, combined with the difference in thermal expansion coefficients between the cladding and substrate materials, causes inconsistent volume shrinkage between the cladding and substrate materials. Generally, the shrinkage rate of the cladding layer is greater than that of the substrate material. The cladding layer is constrained by the surrounding environment (the cold substrate), thus creating residual tensile stress within it. Furthermore, solid metals also experience structural stress due to phase transformation during cooling.

[0004] When the combined stress exceeds the material's strength limit, cracks will occur in weak areas of the workpiece, such as pores and inclusions. Residual stress generated during laser cladding is the root cause of cracks in the cladding layer. Therefore, reducing or eliminating residual stress during the cladding process is the most important method to suppress cracks in the laser cladding layer.

[0005] Therefore, developing efficient and reliable stress homogenization technology within the micro-region of the laser cladding pool, starting from regulating the stress field of the cladding layer, is the key and effective way to solve the problem of laser cladding cracks. Summary of the Invention

[0006] The purpose of this invention is to provide an ultrasonic-assisted laser cladding device to solve the above-mentioned defects caused by the prior art.

[0007] An ultrasonic-assisted laser cladding device includes a mounting platform, a tilting and rotating mechanism, and a cladding and forging mechanism, wherein:

[0008] The flipping and rotating mechanism is provided in pairs and is symmetrically arranged on the top of the mounting platform. The flipping and rotating mechanism includes a motor. The motor rotates forward and drives the clamped crankshaft to flip around the central axis of its connecting rod journal. The motor rotates in reverse and drives the crankshaft of the crossarm to rotate around the central axis of its main journal.

[0009] The cladding forging mechanism is arranged above the pair of flipping and self-rotating mechanisms and includes a second motor, a laser cladding head, and an ultrasonic forging head. The second motor drives the laser cladding head and the ultrasonic forging head to move along the axial direction of the crankshaft. The laser cladding head is used to perform laser cladding on the surface of the connecting rod journal to form a cladding layer, and the ultrasonic forging head is used to perform ultrasonic-assisted forging on the cladding layer after electromagnetic induction heating.

[0010] Preferably, the flipping and self-rotating mechanism further includes a mounting plate, a first cylinder, and a side mounting plate. The mounting plate is vertically installed on the upper side of the mounting table. The first motor is horizontally installed on the upper part of the mounting plate, and a first gear is key-connected to its output end. The first cylinder is horizontally installed in the middle of the mounting plate, and a connecting block is rotatably connected to the end of its piston rod. The center of the connecting block is connected with two steel wire ropes. The side mounting plate is parallel to and beside the mounting plate and is vertically installed on the upper side of the mounting table. A rotating tube is rotatably connected to the middle of the side mounting plate, and a second gear is connected to the outer end of the rotating tube through a first one-way bearing. The second gear meshes with the first gear. A first clamping block is welded to the inner end of the rotating tube, and a second clamping block is movably arranged below the first clamping block. The two steel wire ropes are jointly installed in the rotating tube and respectively pass through the front and back sides of the first clamping block and the second clamping block.

[0011] Preferably, a rotating shaft is rotatably connected to the lower part of the side mounting plate, and a third gear is connected to the outer end of the rotating shaft through a second one-way bearing. The third gear meshes with the second gear. A friction wheel is key-connected to the inner end of the rotating shaft.

[0012] Preferably, the cladding forging mechanism further includes a mounting box, a lead screw, a moving frame, and a second cylinder. There are a pair of mounting boxes which are symmetrically distributed left and right. The mounting boxes are installed above the mounting plate and the side mounting plate on the same side. There are a pair of second motors which are symmetrically distributed left and right. The second motors are horizontally installed in the middle of the mounting boxes on the same side, and a fourth gear is key-connected to their output ends. There are a pair of lead screws which are parallelly connected to the left and right mounting boxes. The two ends of the lead screw are both key-connected with a fifth gear. The fifth gear meshes with the adjacent fourth gear. The moving frame is in a "soil" shape structure and is connected to the two lead screws through a pair of lead screw nuts. A first guide rail is vertically connected to the middle of the moving frame, and a first slider is slidably connected to the first guide rail. A first sliding plate is vertically connected to the side of the first slider. The second cylinder is vertically and upwardly installed on the moving frame through a fixing plate, and a C-shaped moving plate is connected to the end of its piston rod. The moving plate is vertically connected to the upper part of the first sliding plate. The laser cladding head is vertically and downwardly installed on the first sliding plate.

[0013] Preferably, the lower part of the moving frame is connected with a pair of rails two symmetrically in front and back, and a sliding block two is slidably connected on the rails two, the side of the sliding block two is connected with an L-shaped sliding plate two, and a hinge strip is hingedly connected between the sliding plate two and the sliding plate one, a copper coil in the shape of inverted "2" is arranged below the sliding plate two, the copper coil is mounted on the sliding plate two through an insulating plate, and the upper end of the copper coil is electrically connected with a power line, a pair of connecting columns are connected in parallel on the outside of the copper coil, and a sliding frame is slidably connected on the connecting columns, an amplitude transformer is coaxially connected on the sliding frame, and a transducer is coaxially connected on the inner end of the amplitude transformer, and the ultrasonic forging head is coaxially connected on the inner end of the transducer.

[0014] Preferably, the lower side of the clamping block one is pasted with a rubber pad one, and the upper side of the clamping block two is pasted with a rubber pad two.

[0015] Preferably, the steel wire rope is sleeved with a compression spring one between the clamping block one and the clamping block two.

[0016] Preferably, the lower end of the copper coil in front is provided with a plug-in slot, the lower end of the copper coil in back is integrally connected with a plug-in block, and the plug-in block is gap-fitted with the plug-in slot.

[0017] Preferably, the connecting columns are sleeved with a compression spring two between the copper coil and the sliding frame.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] 1、The piston rod of the cylinder two is elongated to drive the laser cladding head to approach the connecting rod journal of the crankshaft, the laser cladding head is used to perform laser cladding on the surface of the connecting rod journal to form a cladding layer, meanwhile, the motor two drives the lead screw to rotate through the transmission of the gear four and the gear five, thereby driving the laser cladding head on the moving frame to move along the axial direction of the crankshaft, in addition, the motor one drives the clamped crankshaft to rotate 360° around the central axis of the connecting rod journal, thereby forming a complete cladding layer on the surface of the connecting rod journal.

[0020] 2、The piston rod of the cylinder two is retracted to drive the laser cladding head to move away from the connecting rod journal of the crankshaft, meanwhile, the two copper coils are coaxially sleeved on the connecting rod journal of the crankshaft, the connecting rod journal and the cladding layer thereon are subjected to electromagnetic induction heating through the energized copper coils, then the cladding layer is subjected to ultrasonic forging and pressing through the ultrasonic forging head with high-frequency vibration, so as to reduce or eliminate the residual stress generated in the cladding process, refine the crystal grains of the cladding layer, and enhance the bonding effect between the cladding layer and the connecting rod journal of the crankshaft, in addition, the motor one drives the clamped crankshaft to rotate 360° around the central axis of the connecting rod journal, thereby performing ultrasonic forging and pressing on the entire cladding layer. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of the overall three-dimensional structure of the present application.

[0022] Figure 2 is a schematic view of the overall front view of the present application.

[0023] Figure 3 is a schematic view of the overall first view of the flip-rotation mechanism.

[0024] Figure 4 is a schematic view of the overall second view of the flip-rotation mechanism.

[0025] Figure 5 is a schematic view of the overall first view of the cladding forging mechanism.

[0026] Figure 6 is a schematic view of the overall second view of the cladding forging mechanism.

[0027] Figure 7 is a schematic view of the local first view of the cladding forging mechanism.

[0028] wherein:

[0029] 10 - mounting table;

[0030] 20 - flip-rotation mechanism; 201 - mounting plate; 202 - motor one; 203 - gear one; 204 - cylinder one; 205 - connecting block; 206 - steel wire rope; 207 - side mounting plate; 208 - rotating tube; 209 - one-way bearing one; 210 - gear two; 211 - clamping block one; 212 - rubber pad one; 213 - clamping block two; 214 - rubber pad two; 215 - compression spring one; 216 - rotating shaft; 217 - one-way bearing two; 218 - gear three; 219 - friction wheel;

[0031] 30 - cladding forging mechanism; 301 - mounting box; 302 - motor two; 303 - gear four; 304 - lead screw; 305 - gear five; 306 - moving frame; 307 - lead screw nut; 308 - guide rail one; 309 - sliding block one; 310 - sliding plate one; 311 - cylinder two; 312 - fixed plate; 313 - moving plate; 314 - laser cladding head; 315 - guide rail two; 316 - sliding block two; 317 - sliding plate two; 318 - hinged strip; 319 - copper coil; 319a - plug-in slot; 319b - plug-in block; 320 - insulating plate; 321 - power line; 322 - connecting column; 323 - sliding frame; 324 - compression spring two; 325 - amplitude transformer; 326 - transducer; 327 - ultrasonic forging head;

[0032] 40 - crankshaft. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0034] As shown in Figures 1 to 7 An ultrasonic-assisted laser cladding device includes a mounting table 10, a flip-rotation mechanism 20, and a cladding forging mechanism 30, wherein:

[0035] The flip-rotation mechanism 20 is disposed above the mounting table 10 in a pair of left-right symmetrical manner, and includes a motor 202. The motor 202 drives the clamped crankshaft 40 to rotate around the central axis of the connecting rod journal, and reversely drives the cross arm crankshaft 40 to rotate around the central axis of the main journal.

[0036] The cladding forging mechanism 30 is disposed above the pair of flip-rotation mechanisms 20 and includes a motor 302, a laser cladding head 314, and an ultrasonic forging head 327. The motor 302 drives the laser cladding head 314 and the ultrasonic forging head 327 to move along the axial direction of the crankshaft 40. The laser cladding head 314 performs laser cladding on the surface of the connecting rod journal to form a cladding layer, and the ultrasonic forging head 327 performs ultrasonic-assisted forging on the cladding layer after electromagnetic induction heating.

[0037] In the embodiment, the overturning rotation mechanism 20 further comprises a mounting plate 201, a cylinder 204 and a side plate 207. The mounting plate 201 is vertically mounted on the upper side of the mounting table 10. The motor 202 is horizontally mounted on the upper part of the mounting plate 201, and a gear 203 is keyed connected to the output end of the motor 202. The cylinder 204 is horizontally mounted on the middle part of the mounting plate 201, and a connecting block 205 is rotatably connected to the piston rod end of the cylinder 204. Two steel wires 206 are connected to the center of the connecting block 205. The side plate 207 is parallel to the mounting plate 201 and is vertically mounted on the upper side of the mounting table 10. A rotating tube 208 is rotatably connected to the middle part of the side plate 207, and a gear 210 is connected to the outer end of the rotating tube 208 through a one-way bearing 209. The gear 210 is meshed with the gear 203. The inner end of the rotating tube 208 is welded with a clamping block 211, and a clamping block 213 is movably arranged below the clamping block 211. The two steel wires 206 are jointly arranged in the rotating tube 208 and are respectively arranged on the front and back sides of the clamping blocks 211 and 213. The piston rod of the cylinder 204 is retracted to tighten the steel wires 206, so as to clamp the clamping blocks 211 and 213 on the end of the crankshaft 40. The motor 202 is driven in forward rotation, and the rotating tube 208 is driven to rotate through the transmission of the gears 203 and 210, so as to drive the clamped crankshaft 40 to overturn 360° around the central axis of the connecting rod journal. During this period, the one-way bearing 209 is in a locked state and can transmit torque.

[0038] In the embodiment, the lower part of the side plate 207 is rotatably connected with a rotating shaft 216, and a gear 218 is connected to the outer end of the rotating shaft 216 through a one-way bearing 217. The gear 218 is meshed with the gear 210. The inner end of the rotating shaft 216 is keyed connected with a friction wheel 219. The piston rod of the cylinder 204 is elongated to loosen the steel wires 206, so as to horizontally support the clamping blocks 213 on the left and right sides of the crankshaft 40. The two ends of the crankshaft 40 respectively contact the friction wheels 219 on the left and right sides. The motor 202 is driven in reverse rotation, and the rotating shaft 216 is driven to rotate through the transmission of the gears 203, 210 and 218, so as to drive the horizontally supported crankshaft 40 to overturn 180° around the central axis of the main shaft journal. During this period, the one-way bearing 209 is in a movable state and cannot transmit torque, and the one-way bearing 217 is in a locked state and can transmit torque.

[0039] In this embodiment, the cladding forging mechanism 30 further includes mounting boxes 301, a lead screw 304, a moving frame 306 and a second cylinder 311. There are a pair of mounting boxes 301 which are symmetrically distributed left and right. The mounting boxes 301 are mounted above the mounting plate 201 and the side mounting plate 207 on the same side. There are a pair of second motors 302 which are symmetrically distributed left and right. The second motors 302 are horizontally mounted in the middle of the mounting boxes 301 on the same side, and a fourth gear 303 is key-connected to the output end thereof. There are a pair of lead screws 304 which are parallelly connected to the left and right mounting boxes 301. Fifth gears 305 are key-connected to both ends of the lead screw 304. The fifth gears 305 are meshed with the adjacent fourth gears 303. The moving frame 306 is in a "soil" - shaped structure and is connected to the two lead screws 304 through a pair of lead screw nuts 307. A first guide rail 308 is vertically connected to the middle of the moving frame 306, and a first slider 309 is slidably connected to the first guide rail 308. A first slide plate 310 is vertically connected to the side surface of the first slider 309. The second cylinder 311 is vertically upwardly mounted on the moving frame 306 through a fixing plate 312, and a C - shaped moving plate 313 is connected to the end of its piston rod. The moving plate 313 is perpendicularly connected to the upper part of the first slide plate 310. The laser cladding head 314 is vertically downwardly mounted on the first slide plate 310. By the piston rod of the second cylinder 311 extending to drive the laser cladding head 314 to approach the connecting rod journal of the crankshaft 40, and the laser cladding head 314 performs laser cladding on the surface of the connecting rod journal to form a cladding layer. At the same time, after being transmitted by the fourth gear 303 and the fifth gear 305, the second motor 302 drives the lead screw 304 to rotate, thereby driving the laser cladding head 314 on the moving frame 306 to move along the axial direction of the crankshaft 40. In addition, the first motor 202 drives the clamped crankshaft 40 to rotate 360° around the central axis of its connecting rod journal, thereby forming a complete cladding layer on the surface of the connecting rod journal.

[0040] In the embodiment, the lower part of the moving frame 306 is symmetrically connected with a pair of guide rails two 315, and a sliding block two 316 is slidingly connected on the guide rails two 315, the side surface of the sliding block two 316 is connected with an L-shaped sliding plate two 317, a hinge strip 318 is hingedly connected between the sliding plate two 317 and the sliding plate one 310, a reverse "2"-shaped copper coil 319 is arranged below the sliding plate two 317, the copper coil 319 is installed on the sliding plate two 317 through an insulating plate 320, and the upper end of the copper coil 319 is electrically connected with a power line 321, a pair of connecting columns 322 are connected in parallel outside the copper coil 319, and a sliding frame 323 is slidingly connected on the connecting columns 322, an amplitude transformer 325 is coaxially connected on the sliding frame 323, a transducer 326 is coaxially connected at the inner end of the amplitude transformer 325, and the ultrasonic forging head 327 is coaxially connected at the inner end of the transducer 326. Through the contraction of the piston rod of the air cylinder two 311, the laser cladding head 314 is driven away from the connecting rod journal of the crankshaft 40, the two copper coils 319 are coaxially sleeved on the connecting rod journal of the crankshaft 40, the connecting rod journal and the cladding layer thereon are subjected to electromagnetic induction heating through the energized copper coil 319, then the cladding layer is subjected to ultrasonic forging through the ultrasonic forging head 327, so as to reduce or eliminate the residual stress generated in the cladding process, refine the crystal grains of the cladding layer, and enhance the bonding effect between the cladding layer and the connecting rod journal of the crankshaft 40. In addition, the clamped crankshaft 40 is driven by the motor one 202 to rotate 360° around the central axis of the connecting rod journal, so as to perform ultrasonic forging on the entire cladding layer.

[0041] In the embodiment, the lower side of the clamping block one 211 is pasted with a rubber pad one 212, and the upper side of the clamping block two 213 is pasted with a rubber pad two 214. The rubber pad one 212 and the rubber pad two 214 can increase the friction when clamping the crankshaft 40, and can also avoid leaving marks when clamping the crankshaft 40.

[0042] In the embodiment, the steel wire rope 206 is sleeved with a compression spring one 215 between the clamping block one 211 and the clamping block two 213. When the steel wire rope 206 is loosened, the clamping block one 211 and the clamping block two 213 can be separated through the compression spring one 215.

[0043] In the embodiment, the lower end of the front copper coil 319 is provided with a plug-in slot 319a, the lower end of the rear copper coil 319 is integrally connected with a plug-in block 319b, and the plug-in block 319b is gap-fitted with the plug-in slot 319a. Through the plug-in fitting between the plug-in block 319b and the plug-in slot 319a, the contact area and the connection strength between the front and rear copper coils 319 can be increased, so as to ensure that the current can smoothly and stably flow through the copper coil 319.

[0044] In this embodiment, the connecting column 322 is sleeved with a compression spring 324 between the copper coil 319 and the sliding frame 323. When the cladding layer is ultrasonic forged on the crankshaft 40, the ultrasonic forging head 327 can be tightly pressed against the surface of the cladding layer through the compression spring 324.

[0045] The working principle of the ultrasonic auxiliary laser cladding device is as follows:

[0046] S1: The crankshaft 40 to be repaired is clamped on the left and right clamping blocks 213, and the two ends of the crankshaft 40 are in contact with the left and right friction wheels 219, respectively, while ensuring that the two connecting rod journals in the middle are coaxially distributed between the left and right rotating tubes 208.

[0047] S2: The piston rod of the cylinder 204 is retracted and the steel wire rope 206 is tightened, thereby clamping the clamping block 211 and the clamping block 213 on the end of the crankshaft 40. Then, the motor 202 is driven in the forward direction, and the rotating tube 208 is driven to rotate through the transmission of the gear 203 and the gear 210, thereby driving the clamped crankshaft 40 to rotate 360° around the central axis of the connecting rod journal. During this period, the one-way bearing 209 is in a locked state and can transmit torque.

[0048] S3: The piston rod of the cylinder 311 is extended and drives the laser cladding head 314 to approach the connecting rod journal of the crankshaft 40. The laser cladding head 314 performs laser cladding on the surface of the connecting rod journal and forms a cladding layer. At the same time, the lead screw 304 is driven to rotate through the transmission of the gear 303 and the gear 305, thereby driving the laser cladding head 314 on the moving frame 306 to move along the axial direction of the crankshaft 40. In addition, the clamped crankshaft 40 is driven to rotate 360° around the central axis of the connecting rod journal by the motor 202, thereby forming a complete cladding layer on the surface of the connecting rod journal.

[0049] S4: The piston rod of the cylinder 311 is retracted and drives the laser cladding head 314 to move away from the connecting rod journal of the crankshaft 40. At the same time, the two copper coils 319 are coaxially sleeved on the connecting rod journal of the crankshaft 40. The connecting rod journal and the cladding layer thereon are subjected to electromagnetic induction heating through the energized copper coil 319. Then, the cladding layer is subjected to ultrasonic forging through the high-frequency vibrating ultrasonic forging head 327, so as to reduce or eliminate the residual stress generated during the cladding process, refine the grains of the cladding layer, and enhance the bonding effect between the cladding layer and the connecting rod journal of the crankshaft 40. In addition, the clamped crankshaft 40 is driven to rotate 360° around the central axis of the connecting rod journal by the motor 202, thereby performing ultrasonic forging on the entire cladding layer.

[0050] S5: By the piston rod of the cylinder 204 is elongated and relax the steel wire rope 206, in turn, the cross arm of the crankshaft 40 is clamped on the two sides of the clamping block two 213, and the two ends of the crankshaft 40 are respectively contacted on the two sides of the friction wheel 219.

[0051] S6: Again by the motor 202 is reversed and after the transmission of gear one 203, gear two 210 and gear three 218 drive the rotating shaft 216 rotation, in turn, the cross arm of the crankshaft 40 is rotated around its main journal axis 180°, at the same time, ensure the two ends of the two connecting rod journal and the two rotating tube 208 coaxial distribution, during this period, the one-way bearing one 209 is active state, can't transmit torque, the one-way bearing two 217 is in the state of lock, can transmit torque.

[0052] S7: By the piston rod of the cylinder 311 is elongated and drive the laser cladding head 314 close to the connecting rod journal of the crankshaft 40, and by the laser cladding head 314 in the surface of the connecting rod journal laser cladding and form the cladding layer, at the same time, by the motor 302 after the transmission of gear four 303 and gear five 305 drive the lead screw 304 rotation, in turn, drive the laser cladding head 314 on the moving frame 306 along the axial direction of the crankshaft 40 movement, in addition, by the motor 202 drive the clamped crankshaft 40 around its connecting rod journal axis 360° rotation, in turn, form a complete cladding layer on the surface of the connecting rod journal.

[0053] S8: By the piston rod of the cylinder 311 is contracted and drive the laser cladding head 314 away from the connecting rod journal of the crankshaft 40, at the same time, drive the front and rear two copper coil 319 coaxial sleeve on the connecting rod journal of the crankshaft 40, and by the copper coil 319 electromagnetic induction heating of the connecting rod journal and the cladding layer on it, then by the high frequency vibration of the ultrasonic forging head 327 on the cladding layer ultrasonic forging, to reduce or eliminate the residual stress generated in the process of cladding, refine the grain of the cladding layer, enhance the combination effect between the cladding layer and the connecting rod journal of the crankshaft 40. In addition, by the motor 202 drive the clamped crankshaft 40 around its connecting rod journal axis 360° rotation, in turn, the whole cladding layer is ultrasonic forging.

[0054] S9: By the piston rod of the cylinder 204 is elongated and relax the steel wire rope 206, in turn, the cross arm of the crankshaft 40 is clamped on the two sides of the clamping block two 213, and the two ends of the crankshaft 40 are respectively contacted on the two sides of the friction wheel 219, finally take away the repaired crankshaft 40.

[0055] Therefore, the above disclosed embodiments, in various aspects, are only illustrative, not the only. All changes within the scope of the invention or within the scope equivalent to the invention are included in the invention.

Claims

1. An ultrasonic-assisted laser cladding device, characterized in that, It includes a mounting platform (10), a tilting and rotating mechanism (20), and a cladding and forging mechanism (30), wherein: The flipping and rotating mechanism (20) is provided in pairs and symmetrically arranged above the mounting platform (10). The flipping and rotating mechanism (20) includes a motor (202). The motor (202) rotates forward and drives the clamped crankshaft (40) to flip around the central axis of its connecting rod journal. The motor (202) rotates in reverse and drives the crankshaft (40) of the crossarm to rotate around the central axis of its main journal. The cladding and forging mechanism (30) is located above the pair of rotating mechanisms (20) and includes a second motor (302), a laser cladding head (314), and an ultrasonic forging head (327). The second motor (302) drives the laser cladding head (314) and the ultrasonic forging head (327) to move along the axial direction of the crankshaft (40). The laser cladding head (314) performs laser cladding on the surface of the connecting rod journal to form a cladding layer. The ultrasonic forging head (327) performs ultrasonic-assisted forging on the cladding layer after electromagnetic induction heating. The rotating mechanism (20) further includes a mounting plate (201), a cylinder (204), and a side mounting plate (207). The mounting plate (201) is vertically mounted on the upper side of the mounting platform (10). The motor (202) is horizontally mounted on the upper part of the mounting plate (201) and a gear (203) is keyed to its output end. The cylinder (204) is horizontally mounted in the middle of the mounting plate (201) and a connecting block (205) is rotatably connected to the end of its piston rod. Two steel wire ropes (206) are connected to the center of the connecting block (205). The side mounting plate (207) is parallel to the side of the mounting plate (201) and vertically mounted on the upper side of the mounting platform (10). A rotating tube (208) is rotatably connected to the middle of the side mounting plate (207), and a passage is opened at the outer end of the rotating tube (208). A gear 2 (210) is connected via a one-way bearing 1 (209), and the gear 2 (210) meshes with the gear 1 (203). A clamping block 1 (211) is welded to the inner end of the rotating tube (208), and a clamping block 2 (213) is movably provided below the clamping block 1 (211). Two steel wire ropes (206) are jointly installed in the rotating tube (208) and respectively installed on the front and rear sides of the clamping block 1 (211) and the clamping block 2 (213). A rotating shaft (216) is rotatably connected to the lower part of the side plate (207), and a gear 3 (218) is connected to the outer end of the rotating shaft (216) via a one-way bearing 2 (217). The gear 3 (218) meshes with the gear 2 (210), and a friction wheel (219) is keyed to the inner end of the rotating shaft (216). The cladding forging mechanism (30) further includes mounting boxes (301), lead screws (304), a moving frame (306) and a second cylinder (311). There are a pair of mounting boxes (301) which are symmetrically distributed left and right. The mounting boxes (301) are installed above the same-side mounting plate (201) and side mounting plate (207). There are a pair of second motors (302) which are symmetrically distributed left and right. The second motors (302) are horizontally installed in the middle of the same-side mounting boxes (301), and a fourth gear (303) is key-connected to the output end thereof. There are a pair of lead screws (304) which are parallelly connected to the left and right mounting boxes (301). Fifth gears (305) are key-connected to both ends of the lead screws (304). The fifth gears (305) are meshed with the adjacent fourth gears (303). The moving frame (306) is in a "soil" shape and is connected to the two lead screws (304) through a pair of lead screw nuts (307). A first guide rail (308) is vertically connected to the middle of the moving frame (306), and a first slider (309) is slidably connected to the first guide rail (308). A first slide plate (310) is vertically connected to the side of the first slider (309). The second cylinder (311) is vertically upwardly installed on the moving frame (306) through a fixing plate (312), and a C-shaped moving plate (313) is connected to the end of its piston rod. The moving plate (313) is perpendicularly connected to the upper part of the first slide plate (310). The laser cladding head (314) is vertically downwardly installed on the first slide plate (310); A pair of second guide rails (315) are symmetrically connected to the front and rear of the lower part of the moving frame (306), and a second slider (316) is slidably connected to the second guide rails (315). An L-shaped second slide plate (317) is connected to the side of the second slider (316), and a hinge bar (318) is hinged between the second slide plate (317) and the first slide plate (310). An inverted "2" - shaped copper coil (319) is provided below the second slide plate (317). The copper coil (319) is installed on the second slide plate (317) through an insulating plate (320), and a power cord (321) is electrically connected to the upper end of the copper coil (319). A pair of connecting columns (322) are parallelly connected to the outside of the copper coil (319), and a sliding frame (323) is slidably connected to the pair of connecting columns (322). A second compression spring (324) is sleeved on the connecting columns (322) between the copper coil (319) and the sliding frame (323). A transducer (325) is coaxially connected to the sliding frame (323), and a transducer (326) is coaxially connected to the inner end of the transducer (325). The ultrasonic forging head (327) is coaxially connected to the inner end of the transducer (326).

2. The ultrasonic-assisted laser cladding equipment according to claim 1, characterized in that, A first rubber pad (212) is pasted on the lower side of the first clamping block (211), and a second rubber pad (214) is pasted on the upper side of the second clamping block (213).

3. The ultrasonic-assisted laser cladding equipment according to claim 1, characterized in that, A first compression spring (215) is sleeved on the wire rope (206) between the first clamping block (211) and the second clamping block (213).

4. The ultrasonic-assisted laser cladding equipment according to claim 1, characterized in that, The lower end of the front copper coil (319) is provided with a plug groove (319a), and the lower end of the rear copper coil (319) is integrally connected with a plug block (319b), and the plug block (319b) and the plug groove (319a) are fitted with a gap.

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