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在党的“九大”团结、胜利路线的鼓舞下,我厂三车间革命工人高举“鞍钢宪法”的伟大旗帜,对M8810老式无心夹具进行了改革,经过一年多的试验,效果很好,正普遍使用。其结构如图1。 主轴8是重新设计的,铁芯7安装在主轴8的孔内,密封圈3固定在铁芯上,并可随其旋转,磁极6安置在3上,法兰盘2用主轴轴承孔定位,并用螺钉紧固在机床上,其上装有线圈4、隔磁环9（黄铜制造,用以减少磁力损失）。底座1固定在摆头的横刀架上,其孔基本与主轴同心（安装时找正）,底座1上装有调整支承角度的滑块12,12上固紧支架11,支承10（弧形）装在11的孔内,并用螺丝夹紧。
Inspired by the party’s “9 Big” solidarity and triumphant victories, the revolutionary workers of the 3rd Workshop of our factory held the great banner of “Ansteel Constitution” and carried out reforms on the M8810 old-fashioned unintentional fixtures. After more than one year of trial, the effect was very good, Is commonly used. The structure shown in Figure 1. The spindle 8 is redesigned, the iron core 7 is installed in the hole of the spindle 8, the sealing ring 3 is fixed on the iron core and can rotate with it, the magnetic pole 6 is arranged on the 3, the flange 2 is positioned by the spindle bearing hole, And screwed on the machine, which is equipped with a coil 4, magnetic ring 9 (brass, to reduce the loss of magnetic). The base 1 is fixed on the horizontal turret of the oscillating head, and the hole of the base 1 is concentric with the main shaft (to be correct when installed). The base 1 is provided with a bracket 12 for adjusting the supporting angle, Fitted in hole 11 and clamped with screw.