A jig and method for high-speed laser cladding remanufacturing of engine connecting rods

Abstract

The invention discloses a fixture and method for high-speed laser cladding and remanufacturing of engine connecting rods, including a workbench, a first motor, a main shaft, a clamping mechanism, a turntable, a self-rotating index plate, a connecting rod clamping mechanism, a second Composed of a gear, a second gear and a second motor; the main shaft is driven by the first motor, and the main shaft passes through the center holes of the two turntables and is fixed on the workbench by two bearing seats; multiple autorotators are respectively installed on the two turntables. Indexing plate; a connecting rod clamping mechanism is installed between the two self-rotating indexing plates at the opposite positions of the two rotating discs, and the connecting rod clamping mechanism is used to clamp the connecting rod to be repaired, and the connecting rod on one of the rotating discs The self-rotating indexing plate is controlled by the clamping mechanism whether it can rotate; the self-rotating indexing plate on the other turntable is connected with the pinion; the second motor is connected with the large gear, and when the small gear moves to the position of the large gear, the small The gear can mesh with the bull gear.

Description

technical field [0001] The invention relates to the field of remanufacturing and repairing, in particular to a fixture and method for repairing engine connecting rods by high-speed laser cladding. Background technique [0002] The crank connecting rod mechanism is the main movement mechanism of the engine, in which the connecting rod is between the piston and the crankshaft, which plays the role of transmitting motion, transmits the force borne by the piston to the crankshaft, and converts the reciprocating motion of the piston into the rotational motion of the crankshaft . During the operation of the engine, the inner hole of the big end of the connecting rod and the crankshaft rotate relatively. Under the action of complex alternating stress, the inner hole of the big end of the connecting rod is prone to deformation and out of round phenomenon, which increases the standard fit clearance with the crankshaft, which will aggravate the deformation of the inner hole At the sa...

AI Technical Summary

Problems solved by technology

During the operation of the engine, the inner hole of the big end of the connecting rod and the crankshaft rotate relatively. Under the action of complex alternating stress, the inner hole of the big end of the connecting rod is prone to deformation and out of round phenomenon, which increases the standard fit clearance with the crankshaft, which will aggravate the deformation of the inner hole At the same time, it will also affect the smoothness and reliability of motion transmission

When the out-of-tolerance can no longer be used, the connecting rod needs to be repaired or remanufactured. The commonly used repair methods include size reduction repair method and brush plating remanufacturing, etc. The size reduction repair method limits the interchangeability of parts and weakens the strength of parts , the brush plating technology is still difficult to control the surface roughness and dimensional accuracy of the coating, and there is some pollution in the brush plating solution

[0003] High-speed laser cladding technology has the advantages of high efficiency, energy concentration, small heat-affected zone, high material utilization rate, and high bonding strength between coating and substrate. It has received extensive attention in parts remanufacturing and repair, but there is no high-speed laser cladding Application of Repair Connecting Rod

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