A processing technology and processing device for the tooth-shaped surface of the inner hole of a waveguide with a large length-to-diameter ratio

Abstract

The invention belongs to the technical field of precise machining, and relates to a machining technology and a machining device for machining a large-length-diameter waveguide tube inner hole toothed face. The machining device comprises a standard horizontal numerical control lathe, two automatic centering clamps, one double-support boring bar and an ultrasonic vibration cutting device. The machining technology comprises five steps that rigidity of a workpiece is increased through a workpiece dual-support; the rigidity of a cutter bar is increased through a cutter bard dual-support; a cutter has the ultrasonic vibration, cutting force is reduced, and durability of the cutter is improved; high-pressure cooling liquid directly acts on the tool tip to improve the cooling effect, chippings are stroke off and brought away, and the scratch of the chippings on the machined surface is reduced. Through the machining system and the machining technology, the problem that an existing technology system cannot machine the large-length-diameter waveguide tube inner hole continuous sine wave toothed face is solved, the form and position error is smaller than 0.04 mm, and the surface roughness is smaller than Rz4.

Description

technical field [0001] The invention belongs to the technical field of precision machining, and relates to a processing technology and a processing device for processing the tooth profile surface of the inner hole of a corrugated waveguide with a large length-to-diameter ratio. Background technique [0002] In nuclear fusion research, in order to heat the plasma to the temperature required for the fusion reaction, various heating methods are usually required, and electron cyclotron resonance heating is one of the important heating methods. The power of a single electron cyclotron resonance heating system is usually 500kW to 1MW, and high-power microwaves need to be transmitted through the transmission system and injected into the plasma. In order to transmit high-power long-pulse microwaves with low consumption, high efficiency, and stability, a corrugated straight waveguide is usually used as the main transmission component of the electron cyclotron resonance heating system...

AI Technical Summary

Problems solved by technology

However, the boring bar can only adopt the cantilever beam structure when used for the processing of waveguides with large aspect ratio. On the other hand, due to the large cutting force, the deformation of the process system is also large, and the combined effect of unstable system deformation and vibration leads to a further increase in surface roughness and a decrease in tool durability

Therefore, the existing processing technology is difficult to meet the technical requirements of the tooth shape accuracy, uniformity and smoothness of the inner wall of the corrugated waveguide with a large length-to-diameter ratio of 1 meter required by the high-power electronic gyrosystem

The process system of the present invention aims to solve the problems of poor rigidity, low tool durability and large surface roughness in the existing turning process system: through the transformation of ordinary CNC machine tools, special fixtures and boring tool bars are designed and manufactured to meet the requirements of long parts. The processing requirements of large length-to-diameter ratio workpieces can improve the rigidity of the process system; through the use of ultrasonic vibration cutting technology, the turning force can be reduced, the tool durability can be improved, and the roughness value can be reduced

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