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一、概述飞机上薄壁圆筒形零件很多,如机翼防冰前缘件、起落架外筒、各种作动筒内外筒、各种精密防尘罩、贮压器外筒等。一类是采用鈑金弯曲、拉形、焊接而成,一类是由机械加工制成。其特点是:壁薄、精度高、有配合要求。这些薄壁圆筒形零件往往由于热处理、机加切削热以及工艺安排不合理等不良因素以致产生椭圆和轴向变形。这种变形的量一般不太大(0.05～0.2毫米),但又不符合技术要求(一般要求0.02毫米),以往采用搪磨和三点
First, an overview of the aircraft a lot of thin-walled cylindrical parts, such as wing anti-ice front pieces, landing gear outer tube, a variety of inner and outer cylinder, a variety of precision dust cover, cylinder and so on. One is the use of sheet metal bending, drawing, welding is made, one is made by machining. Its features are: thin wall, high precision, with the requirements. These thin-walled cylindrical parts often due to heat treatment, machining cutting heat and unreasonable arrangements and other adverse factors resulting in elliptical and axial deformation. The amount of deformation is generally not too large (0.05 ~ 0.2 mm), but does not meet the technical requirements (generally require 0.02 mm), the past with honing and three