A method and device for electro-spark bronze plating on the surface of aircraft metal parts

Abstract

The invention discloses a method and a device for electro-spark bronze plating on the surface of aircraft metal parts. The electrodes of the device vibrate by means of a vibrator to periodically connect and disconnect the circuit, and instantaneously form sparks of instantaneous thermal pulse discharge on the surface of the metal workpiece. , so that the contact part of the electrode material is melted, boiled and evaporated. This method uses different power, vibration frequency, and amplitude for electro-spark bronze plating. The end surface of the electrode material contacts the workpiece surface and swings to both sides to make a uniform movement back and forth, so that the surface layer of the workpiece alloying. The invention solves the problem that the traditional electric spark strengthening has a large thermal impact on the workpiece substrate and the hardness drops significantly, and at the same time it cannot meet the use requirements that there should be gaps on the coating surface, improves the wear resistance and scratch resistance of the surface, and breaks through the constraints The technical bottleneck of surface alloying repair of aircraft overhaul metal parts.

Description

technical field [0001] The invention belongs to the surface alloying treatment technology of Su series aircraft workpieces. More precisely, it is to coat and infiltrate one conductive material onto the surface of another conductive material through the action of electric spark discharge, thereby changing the surface physical and chemical properties of the latter. Process methods with special properties such as chemistry. Background technique [0002] During the overhaul of the Su-27 aircraft, the original coating on the mating surfaces of workpieces such as the piston rod and the inner ring on the landing gear was worn, and the working surfaces needed to be repaired by alloying. Since the factory cannot introduce relevant Russian technology, conventional methods such as electroplating deposition or spraying cannot meet the bonding strength requirements of the pattern design. The traditional EDM has a large thermal impact on the substrate of the workpiece, and the hardness dr...

AI Technical Summary

Problems solved by technology

Since the factory cannot introduce relevant Russian technology, conventional methods such as electroplating deposition or spraying cannot meet the bonding strength requirements of the pattern design. The traditional EDM has a large thermal impact on the substrate of the workpiece, and the hardness drops significantly. At the same time, it cannot meet the requirements of the coating surface. In order to break through the bottleneck restricting aircraft overhaul and ensure the repair cycle of the aircraft, it is necessary to study a coating method for surface alloying

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