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我厂在加工柴油机摇臂轴攻丝时,原来是用三爪卡盘夹紧零件,由于孔与外圆有偏心,因而经常折断丝锥。现改用浮动定心攻丝钳后,只要零件外圆与丝孔偏心量在0.5毫米范围内,都不会折断丝锥,攻丝质量也有所提高。被加工零件的材料为45、20号钢,螺孔为M8×1。底盘1固定在攻丝机或立钻工作台上,活动盘3的孔和定位轴5之间有1.5毫米的间隙,所以在攻丝时,使零件有一定浮动量,限位销2防止活动盘3旋转。
I plant processing diesel engine rocker shaft tapping, the original is to use three jaw chuck clamping parts, due to the eccentric hole and the outer cylindrical, and thus often broken taps. Now switch to floating centering tapping pliers, as long as the parts eccentricity of the outer circle and the hole is within 0.5 mm, will not break the tap, tapping quality has also been improved. The material of the parts to be machined is steel No. 45 and 20, and the screw hole is M8 × 1. The chassis 1 is fixed on the tapping machine or vertical drilling table. There is a gap of 1.5mm between the hole of the movable plate 3 and the positioning shaft 5. Therefore, when tapping, the parts have a certain floating amount, the stopper pin 2 prevents the activities Disk 3 rotates.