Method for high-efficiency allowance-removing numerical control machining for groove-cavity structured part with corner

Abstract

The invention provides an efficient processing method for a component with a typical deep trench cavity and relatively small rotation angle structure in the digital control processing. The processing method provides the selection strategy and the digital control processing method of tool specification during the rough machining and material removing of the component rough lumber, which is characterized in that the flank milling, material removing and processing of the trench cavity are performed through selecting a tool with 4r-16r diameter at first, and then the plunge milling and material removing of the rotation angle of the trench cavity are performed through selecting a tool with 2r-3r diameter for a plurality of times. The processing method has the advantages that the rough machining is adopted so that the processing efficiency is greatly enhanced, the milling allowance for finish-machining is basically even, and the method avoids the problem that the processing quality of finish machining is affected by overlarge rotation angle allowance.

Description

technical field [0001] The invention relates to the technical field of numerical control machining, in particular to high-efficiency numerical control milling of cavity structures in aircraft parts. Background technique [0002] At present, the material utilization rate of aviation parts is only 3-4%, and the amount of rough machining material removal is generally 70-80%. The ideal state of rough machining is based on the strategy of high-efficiency machining. While achieving high-efficiency machining, increase the amount of material removal as much as possible to ensure uniform part allowance and smooth finishing. From the perspective of improving processing efficiency, large-diameter cutters should be used as much as possible to mill the inner wall of the cavity structure of the part. However, in actual processing, especially when processing parts with similar structures such as deep grooves and small corners, after using large-diameter tools for rough milling, there is a...

AI Technical Summary

Problems solved by technology

However, in actual processing, especially when processing parts with similar structures such as deep grooves and small corners, after using large-diameter tools for rough milling, there is a large margin at the corners, which affects the accuracy of finishing. went smoothly

In order to avoid the above situation, usually only a tool with a radius equal to or slightly larger than the corner can be used for rough machining of the groove cavity. At this time, the length-to-diameter ratio of the tool is much larger than the general processing state, and the rigidity of the tool decreases sharply, which seriously affects the rough machining of the part. efficiency

Images