Tool and method for machining variable-section hole through total reflection laser and jet flow electrolysis assisted by dry ice impact

Abstract

The invention discloses a tool and method for machining a variable cross-section hole through total reflection laser and jet flow electrolysis assisted by dry ice impact, and relates to the field of non-traditional machining, and the tool comprises a hollow annular glass tube, a metal layer and an insulating coating; a metal layer is electroformed on the outer side wall of the hollow annular glass tube, insulating coatings are coated on the outer side wall of the metal layer except a plurality of annular areas without insulating coatings in the axial direction, and secondary electrolysis is carried out on a hole processed at the end part of a tool electrode in the annular areas so as to realize reaming and polishing. According to the machining method, laser beams between the inner tube and the outer tube of the hollow annular glass tube form annular laser beams through total reflection conduction of electrolyte, so that machining efficiency is improved, and meanwhile the flatness of the machined surface is improved; the laser beams reach a machined area on a workpiece through multiple times of total reflection of the wall surfaces of the inner tube and the outer tube; dry ice microparticles are sprayed from the inner pipe of the hollow annular glass pipe to a processing area to promote disturbance and rapid cooling of the processing area. According to the invention, one-time forming processing of the variable cross-section hole can be realized.

Description

technical field [0001] The invention relates to the technical field of special processing, in particular to a tool and method for machining variable-section holes with dry ice impact assisted total reflection laser and jet electrolysis. Background technique [0002] There are many deep and small hole structures of various shapes in the key parts of military fields such as aerospace and navigation. For example, the depth-to-diameter ratio of the oil channel hole and the deep hole on the trailing edge of a certain type of aero-engine exceeds 50 to 1, and there are even ultra-deep small holes with a depth-to-diameter ratio of 500 to 1 in the shipbuilding industry. These deep and small holes are difficult to process and the processing technology is complex, which has become one of the key areas of research by scholars at home and abroad. Especially in the key parts of aero-engines, the number of tiny holes is particularly large, and most of these key parts are made of difficult...

AI Technical Summary

Problems solved by technology

However, the composite process does not improve the comprehensive processing speed of small holes with large depth-to-diameter ratio. This is because in deep hole processing, the transportation of processed products is difficult, and sufficient processing clearance must be reserved to ensure the effective transportation of processed products. Difficult to improve the overall processing efficiency

In addition, for the machining of micro-holes with variable cross-sections, multiple machining processes are usually required, which also reduces the machining efficiency

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