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我厂有一批齿轮箱体如图1,镗孔时φ90一组孔被镗大0.01～0.02mm将造成批量报废.我们从应力分析出发,用零件在加
I plant a number of gear box shown in Figure 1, φ90 bore a group of holes were boring large 0.01 ~ 0.02mm will result in bulk scrapped. We start from the stress analysis, with parts in Canada