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我厂自生产航空产品以来,铝合金衬套精镗孔一直是生产中的薄弱环节。零件是薄壁件,要求一级精度(φ42.03~(+0.016)毫米),光洁度▽9(见图1)。在达不到要求情况下,工艺曾改为▽8。在历年加工中,光洁度多为▽8,有时更低些,只有▽7左右,而且经常出现0.01～0.03毫米的椭圆与锥度。整质工作中,我们在机床、刀具、夹具等几方面进行了探讨,使光洁度与椭圆问题基本得到解决,光洁度为▽9～▽10,有些为▽11,椭圆度与锥度在3～5微米之间,个别为6微米,达到了精镗孔工艺要求。
Since the production of aeronautical products in our factory, fine boring of aluminum alloy bushing has always been a weak link in production. Parts are thin-walled parts, requiring a precision (φ42.03 ~ (+0.016) mm), smoothness ▽ 9 (see Figure 1). In the case of less than required, the craft was changed to ▽ 8. In the past years of processing, the finish is mostly ▽ 8, and sometimes lower, only about ▽ 7, and often appear 0.01 to 0.03 mm oval and taper. The quality of work, we have several aspects of machine tools, cutting tools, fixtures and other aspects of the study so that the basic problems of finish and oval to be solved, finish ▽ 9 ~ ▽ 10, some ▽ 11, ovality and taper in 3 ~ 5 microns Between, individually 6 microns, reached the fine boring process requirements.