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在100t轨道起重机生产中,有一种弹簧挡圈的材质是65Mn钢,调质HRC40～45,外形主尺寸φ272×5(mm)数量12件/台,见图1。传统加工是把坯料锻制成φ280×130(mm)实心棒料,车削φ272外圆,钻φ242孔,用切刀切成一片片5mm厚的圆环,再进行铣、钻、热处理、磨削加工,最后由钳工切口。钻制φ242孔,不仅加工困难,且浪费材料和工时。对工艺革新后,用φ75圆棒锻制成25×50(mm)的矩形毛坯,再围成外径为φ280,内
In the production of 100t orbit crane, there is a kind of material of spring retainer is 65Mn steel, quenched and tempered HRC40 ~ 45, the main dimensions of shape φ272 × 5 (mm) the number of 12 pieces / station, shown in Figure 1. The traditional processing is forging the billet into φ280 × 130 (mm) solid bar, turning the φ272 outer circle, drilling the φ242 hole, and cutting it into a piece of 5 mm thick circular ring with a cutter, then milling, drilling, heat treatment and grinding Processing, and finally cut fitter. Drilling φ242 hole, not only difficult to process, and waste materials and working hours. After the process innovation, using φ75 rod forged into a rectangular blank of 25 × 50 (mm), then surrounded by an outer diameter φ280, within