Machining method for shell through hole thickness

Abstract

The invention discloses a machining method for the shell through hole thickness. The machining method is characterized in that a rotary grinding tool is in contact with a to-be-machined annular surface of a through hole through a grinding layer, and a current detection device detects that the current of a grinding motor is suddenly changed so that a grinding reference surface of the to-be-machinedannular surface can be detected; the collision force to a shell can be reduced through the grinding force of the grinding layer, so that the step of the through hole is prevented from deforming; whenthe shell of a composite material is machined, the problems that the weight of the shell is low and elasticity exists can be solved, meanwhile, the shell is not required to be clamped again at one time, and then the to-be-machined annular surface is directly ground through the grinding layer, so that the grinding amount is obtained; and the machining reference surface of the through hole is fitted through data scanning of a base surface scanning device to obtain the thickness of the through hole of the shell, other detection instruments are not needed, the through hole with the set thicknesscan be quickly machined, and the machining efficiency of the through hole of the shell can be effectively improved. The method is used for machining the through hole of the shell.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a processing method for the thickness of a through hole of a casing. Background technique [0002] Many existing shells are made of composite materials. During the molding process of the shell, the bottom surface of the shell will be uneven or inclined. The step surface of the wall is processed, and the shell is clamped on the CNC milling machine to cut the hole and mill the plane respectively. In the existing technology, in order to ensure the position accuracy, the two processes of cutting the hole and milling the plane can be completed by clamping the shell once. When processing the step surface of the back wall of the through hole, a through hole with a set thickness and a flat step surface are processed according to the installation requirements. The existing technology uses a distance detection instrument to measure the lower step surface of the through hole. ...

AI Technical Summary

Problems solved by technology

[0002] Many existing shells are made of composite materials. During the molding process of the shell, the bottom surface of the shell will be uneven or inclined. The step surface of the wall is processed, and the shell is clamped on the CNC milling machine to cut the hole and mill the plane respectively. In the existing technology, in order to ensure the position accuracy, the two processes of cutting the hole and milling the plane can be completed by clamping the shell once. When processing the step surface of the back wall of the through hole, a through hole with a set thickness and a flat step surface are processed according to the installation requirements. The existing technology uses a distance detection instrument to measure the lower step surface of the through hole. position, and then through the processing reference of the upper step surface of the through hole, so as to obtain the initial thickness. During the process, the step of the through hole is easily deformed, which causes a certain error in the processed hole and affects the assembly of subsequent parts

Images