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我们知道,加工长丝杠整个工艺过程都伴随着振摆(百分表指针的跳动值,为弯曲度的两倍)的产生与消失。由于精密丝杠几何形状比较复杂,精度及精度的稳定性要求甚高,它在制造过程中所产生的内应力只能经时效处理来消除,而内应力的重新分布将使丝杠产生弯曲,一般都禁止使用压力校直,而采用轴线偏移的“最小振摆法”重定中心孔,以切除加工余量来消除振摆。当前在精密丝杠制造过程中,至少要安排3～4次重定中心孔工序,这些工序的合理与否,对加工长丝杠工艺过程的顺利进行影响极大。但是,一般生产精密丝杠的工厂还没有找到一种行之有效的简便
We know that the entire process of machining the lead screw is accompanied by the appearance and disappearance of the pendulum (the beating value of the dial indicator is twice that of the curve). Due to the complexity of the precision screw geometry and the high precision and precision stability requirements, the internal stress generated in the manufacturing process can only be eliminated by the aging treatment. The re-distribution of the internal stress will bend the lead screw, Generally prohibit the use of pressure straightening, and the use of axis offset “minimum pendulum method” to re-center hole to remove the machining allowance to eliminate vibration. Currently in the manufacturing process of precision screw, at least to arrange 3 to 4 times to re-center the hole process, these processes are reasonable or not, the smooth progress of the processing of the screw ball great influence. However, the general factory that manufactures precision leads has not found a proven solution