A hollow servo motor-driven electric spindle for ultrasonic cutting

Abstract

The invention provides an ultrasonic cutting electric spindle driven by a hollow servo motor. The ultrasonic cutting electric spindle comprises an electric spindle body and an acoustic assembly, wherein the electric spindle body comprises a hollow main shaft, a shaft sleeve, a shell, a motor mounting plate and a hollow servo motor; the hollow main shaft is installed in the shaft sleeve through bearings, the shaft sleeve is coaxially installed at the lower end of the shell, the motor mounting plate is arranged at the upper end of the shell, and the hollow servo motor is installed on the motor mounting plate; and the acoustic assembly is coaxially installed in the hollow main shaft through a conical flange. According to the ultrasonic cutting electric spindle, the hollow shaft servo motor isused for driving, the hollow shaft is driven to rotate through an expansion sleeve and a hollow shaft so as to drive the acoustic assembly to realize ultrasonic cutting, a transmission chain is short, so that the rotating motion precision of the main shaft is improved, and therefore machining precision is improved; and meanwhile, a mercury conductive slip ring is used for conducting electricity,compared with a traditional ultrasonic cutting electric spindle utilizing the carbon brush to transmit electric signals, the space layout is more compact, and electric transmission is more reliable.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic cutting processing equipment, and in particular relates to an ultrasonic cutting electric spindle driven by a hollow servo motor. Background technique [0002] Honeycomb composite material is a kind of man-made structural material prepared by aramid fiber and other composite materials imitating the shape of honeycomb in nature. It has the characteristics of light weight, low density, high specific strength, good self-extinguishing property, excellent insulation performance and chemical properties. These characteristics make it one of the indispensable and important materials in the fields of aviation and aerospace manufacturing, and it is more and more widely used in the structural design and manufacture of important parts in these fields. [0003] Honeycomb composites are currently one of the most difficult materials to machine in composites. The traditional high-speed milling of honeycomb co...

AI Technical Summary

Problems solved by technology

The traditional high-speed milling of honeycomb composite materials has the following problems: ①. The cutting force is large and the surface quality is not good. The tearing of the material during the cutting process causes burrs and uneven corners on the edge and contour surface of the part; ②. The processing efficiency is not high and requires A large amount of glue, cutting processing will produce a large pulling force. In order to prevent the parts from being pulled up, the processing feed rate and cutting depth must be reduced to reduce the cutting force, thereby reducing the processing efficiency of the parts; ③. Generate a lot of dust and noise The wind and dust pollution is serious. During the cutting process, the materials are continuously shredded, which generates a lot of noise and dust, which damages the factory environment and damages the health of workers.

However, domestic honeycomb composite material ultrasonic cutting theory and process technology research is still in its infancy, there is no related process theory and cutting equipment with independent intellectual property rights, and most aviation manufacturing enterprises still use traditional high-speed milling process to process honeycomb composite material structural parts

This situation not only hinders the level of autonomy of my country's aviation manufacturing equipment, but also seriously affects the industrial upgrading of the aviation industry and related fields.

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