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1990年10月,在长春第一汽车厂举行的首届全国青工技术大赛,车工应会赛题是加工5个零件,定额工时为8h。这次大赛评分标准:一是精度;二是加工速度。5个零件包括轴类和套类两大类,加工内容有双头蜗杆螺纹;内外锥度的配合,在锥度配合后还要控制两平面的间隙为0.02～0.04mm之间;偏心加工;M16×1.5左-6g的内外螺纹配合;环形槽的加工;在车床上要拉出一条2×3mm端面槽。下面我们分析每一零件的加工要点。
In October 1990, the first National Youth Technology Competition held in Changchun No.1 Automobile Factory, Che GouYingDing’s contest was to process 5 parts with a fixed working hour of 8 hours. The contest scoring standards: First, the accuracy; the second is the processing speed. Five parts, including shaft and sleeve two categories, the processing content of double-headed worm thread; inside and outside the taper with the taper with the plane but also to control the gap between 0.02 ~ 0.04mm; Eccentric machining; M16 × 1.5 left -6g of internal and external threads with; annular groove processing; in the lathe to pull out a 2 × 3mm face groove. Below we analyze the processing points of each part.