Laser cladding and adaptive milling integrated compound CNC machine tool for blade repair

Abstract

The invention discloses a laser cladding and self-adaptive milling integrated composite numerical control machine tool for blade repair, which mainly solves the problems caused by multiple clamping, such as large cutting residue, easy cutting of the repair layer, and manual grinding. Problems such as unstable machining accuracy and low efficiency. This machine tool mainly consists of double T-shaped bed, first column mechanism, second column mechanism, CNC rotary table, top, milling spindle and laser powder cladding device. The first column mechanism slide plate is equipped with a milling spindle for swinging , The milling cutter or coordinate measuring head can be installed on the milling spindle, the gas protection nozzle is set on the sliding plate of the second column mechanism, and the blade is clamped between the CNC rotary table and the top for repair. The invention has ingenious structural design, flexible process combination, strong versatility, good repair and removal processing precision, high yield, greatly reduces production cost, and has good practical and popularization value.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and relates to automation equipment for the remanufacturing process of blade parts. Specifically, it relates to a method of using laser fusion to repair the damaged blade surface and simultaneously combining with numerical control milling to realize cladding and surfacing welding. An integrated compound processing machine tool for high-precision and high-efficiency removal of excess material on parts. Background technique [0002] As an important core part of power plants such as aero-engines and steam turbines, blades operate in harsh working environments such as high temperature, high pressure, vibration, and huge centrifugal force for a long time. The blade surface will inevitably produce corrosion, fatigue cracks, and even fractures. cause a major accident. In addition, the blade is a key part of the turbine that is easy to wear, high in cost and large in quantity. Generally speaking,...

AI Technical Summary

Problems solved by technology

[0006] 1. All existing laser cladding processes cannot achieve precise surface forming, and cannot directly meet the relevant technical requirements in terms of dimensional accuracy and surface quality. The removal of redundant cladding layers on general-purpose CNC machine tools involves two Inconsistent secondary clamping standards, uneven allowance, thin-walled deformation characteristics of the blade, secondary programming and many other technical problems lead to easy cutting of the repair layer, low machining efficiency for removing the allowance, and low yield of processing repairs;

[0007] 2. Manually grinding the blades of the laser fusion repair layer has high technical requirements for workers, and the labor load is large, so it is difficult to maintain a stable removal of material surplus processing. In addition, manual grinding dust pollution is serious, and the working environment is extremely harsh and harmful

[0008] 3. It is difficult for industrial robots to achieve high-precision blade fusion surfacing due to the limitation of their own repeat positioning accuracy, which not only leads to excessive subsequent grinding allowances, but also limits the low stiffness of the robot to the removal of the fusion repair layer. The efficiency is so low that it directly affects the production efficiency of blade repair and remanufacturing

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