优选前:精镗工序是轴瓦生产流水线的薄弱环节,生产效率低,质量不稳定,光洁度只能达到▽7。优选过程:原来镗床的最高转速是2000转/分。用瞎子爬山法提高镗床转速。第一次试验改变传动皮带轮直径,把主轴转速提高到3000转/分,效果很好,产品的光洁度达到▽8～▽9。在此基础上,对机床的结构和刚性进行了分析后,第二次再改皮带 Preferred pre: Fine boring process is the weak link of the bush production line, low production efficiency, unstable quality, finish can only reach ▽ 7. The preferred process: the original maximum speed of boring machine is 2000 rev / min. Use blind climbing method to increase the speed of boring machine. The first test to change the drive pulley diameter, the spindle speed to 3000 rev / min, the effect is very good, the product of the finish ▽ 8 ~ ▽ 9. On this basis, after analyzing the structure and rigidity of the machine tool, change the belt again for the second time