Liquid nitrogen inner spraying type numerical control drilling and milling machine main shaft device

Abstract

The invention discloses a liquid nitrogen inner spraying type numerical control drilling and milling machine main shaft device, belongs to the field of numerical control machine tool main shaft design and relates to a numerical control drilling and milling machine main shaft device. According to the numerical control drilling and milling machine main shaft device, liquid nitrogen flows in an inner cavity of a main shaft to positions near a hollow cutter cutting edge and is sprayed out through thin holes, and therefore copious cooling and low temperature cutting are achieved. The liquid nitrogen inner spraying type main shaft device is composed of a main shaft assembly, a liquid nitrogen heat insulation pipe assembly and a rivet assembly. A main shaft in the main shaft assembly is in a hollow shape, two bearings in the liquid nitrogen heat insulating pipe are arranged on two bearing adapter sleeves respectively in a sleeved mode, and two clamp nuts are screwed to conical face external threads of the two bearing adapter sleeves respectively. Two bevel gears in the rivet assembly are symmetrically installed in two outer round holes of a cutter connection frame, and rotation and limiting of axial moving are achieved through inner groove balls. A vacuum heat insulating hard pipe is composed of an inner steel pipe set and an outer steel pipe set. According to the liquid nitrogen inner spraying type numerical control drilling and milling machine main shaft device, the machining precision and the cutter durability of materials which are difficult to cut are reduced, liquid nitrogen losses are reduced, the machining range of a complicated structural workpiece is expanded, and the liquid nitrogen inner spraying type numerical control drilling and milling machine main shaft device can be used for machining in different working conditions and high in practicability.

Description

technical field [0001] The invention belongs to the design field of the spindle of a numerical control machine tool, and relates to a spindle device of a numerical control drilling and milling machine for realizing deep cooling and low temperature cutting through liquid nitrogen flowing through the inner cavity of the spindle until it is sprayed out from fine holes near the cutting edge of a hollow tool. Background technique [0002] With the continuous development of modern manufacturing industry, the use of CNC machine tools to precisely process difficult-to-machine materials and complex structural parts has become common, and the importance of precision machining technology has become increasingly prominent. As an important equipment in the manufacturing industry, CNC machine tools are also facing opportunities and challenges in the new era. Improving the stability of CNC machine tool machining accuracy, processing efficiency, and reducing tool wear are the key to improvi...

AI Technical Summary

Problems solved by technology

This device can effectively improve the quality of tool processing products, reduce tool wear, prolong the service life of the tool, and improve work efficiency, but the device can only use conventional cutting fluid as the cooling fluid, which cannot process difficult-to-cut materials and ensure cutting accuracy , Improve tool life requirements

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