Abrasive water jet-electrolysis composite pass making method and device for metal part with thermal barrier coating

Abstract

The invention discloses an abrasive water jet-electrolysis composite pass making method and device for metal part with thermal barrier coating. The method comprises the steps that a thermal barrier coating pass with the nonconducting workpiece surface is machined by using an abrasive water jet, and after a metal base body is exposed, a metal base body pass is machined by using electrolysis. The device comprises a workbench, a fixture, a tool electrode, a liquid inlet connector, a servo feeding device, an abrasive working liquid box, an electrolysis working liquid box, an infusion pump, a power source, an electromagnetic valve, a pressure regulating device and an infusion pipe. According to the method, it can be guaranteed that under the condition that a tool and the tool electrode are clamped and positioned at one time, the thermal barrier coating pass and the metal base body pass are sequentially machined, the position of the machined thermal barrier coating pass is coincided with the position of the machined metal base body pass, and the machining quality is easy to guarantee. According to the device, it can be guaranteed that abrasive water jet machining and electrolysis machining are carried out on same machining equipment, and the implementation of the method is guaranteed.

Description

Technical field: [0001] The invention relates to an abrasive water jet-electrolysis composite hole-making method and device for metal parts with a thermal barrier coating, which belongs to the technical field of special processing. Background technique: [0002] With the rapid development of aerospace technology, the use of metal materials alone can no longer meet the requirements for use in high-temperature environments. For example, nickel-based single crystal blades need to increase the working temperature of turbine blades by adopting film cooling structures and preparing thermal barrier coatings on the surface. Coating the ceramic thermal barrier coating on the surface of the gas turbine engine blade can achieve the effect of heat insulation and reduce the surface temperature of the blade, and is one of the important technologies to improve the high temperature resistance of the blade. Thermal barrier coating is a kind of non-conductive ceramic material, which is gener...

AI Technical Summary

Problems solved by technology

In response to this problem, a process currently used is: before the part is coated with a thermal barrier coating, the hole pattern is pre-machined, and then the thermal barrier layer is coated, and finally the thermal barrier coating is removed at the corresponding hole position with a micro drill , the process is complicated, the efficiency is low, and the quality is not easy to control; another processing technology is: first coat the ceramic thermal barrier layer on the blade, then use laser to remove the thermal barrier coating at the corresponding drilling position, and finally use electric machining technology For drilling, the process is more complicated and the processing cost is higher

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