连杆是动力机械中的一个重要零件。连杆小头孔的为2级精度;铜套底孔光洁度要求▽7;铜套孔为▽8。我厂原铜套底孔和铜套孔的最终加工在立式金钢镗床上进行,成批生产中很难保证高光洁度要求,成了生产中的一项障碍。连杆小头孔的滚压试验成功,大大地提高了产品质量和劳动生产率。铜套底孔的加工光洁度可由▽5提高到▽7～9,一般为▽8,铜套孔可由▽6提高到▽8～9。孔的其余精度都在允许的公差范围内。 Connecting rod is an important part of power machinery. Connecting rod small hole for 2 precision; copper bottom hole finish requirements ▽ 7; copper sleeve hole ▽ 8. I plant the original copper and copper holes at the end of the hole in the final processing of the vertical boring machine in the gold, it is difficult to ensure high quality finishings in mass production has become an obstacle in the production. Rolling trial of small hole in connecting rod has succeeded, greatly improving product quality and labor productivity. Copper bottom hole machining finish can be increased from ▽ 5 to ▽ 7 ~ 9, generally ▽ 8, copper sleeve hole can be increased from ▽ 6 to ▽ 8 ~ 9. The remaining accuracy of the hole is within the allowable tolerance.