The center when turning slightness axis is worn bearing and with method of tool carrier bearing

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  • source:BACHTEL CNC Machining
One, use center wears axis of bearing car slightness to be when turning slightness axis, can use central wearing to increase workpiece tigidity. Axis of general turning slightness uses the method that the center wears to have: 1, the center wears direct bearing to be among workpiece when workpiece can when section turning, the center wears bearing to be among workpiece, such bearing, l/d value reduced an in part, the tigidity when turning of long and thin axis can increase several times. Before workpiece mount center is worn, must the groove that in semifinished product mid car goes center of a paragraph of bearing to wear bearing claw, exterior surface roughness and cylinder spend an error to want small, can affect the precision of workpiece otherwise. When turning, the bearing claw that the center wears and workpiece contact place often should add lubricating oil. To make bearing claw and workpiece maintain good contact, also can wear bearing in the center an emery cloth or abrasive are added between claw and workpiece, undertake abrade hold in the arms close. 2, with transfer axis of slightness of sleeve bearing car uses afore-mentioned methodological turning bearing bear the groove that the center wears is more difficult. To solve this problem, can add with transfer the surface contact is in a watch of sleeve, see a picture. Transfer the two end of sleeve contain each 4 bolt, clip semifinished product workpiece with these bolt, the round axes outside adjusting sleeve and coincide of photograph of main shaft axis of rotation, can turning. 2, use with slightness of car of tool carrier bearing the axis is secured with tool carrier go up in bed saddle, have two bearing claw commonly, can follow with tool carrier lathe tool is mobile, offset the stiffness of workpiece can increase when radial cutting, decrease be out of shape. The appearance precision that raises long and thin axis thereby and reduce exterior surface roughness. From the point of the design principle that follows tool carrier, it is OK to need two bearings claw only, because lathe tool gives the cutting of workpiece to fight force F`r, make workpiece is stuck. But when be being used actually, workpiece itself has to be down gravity, and workpiece bends inevitably, accordingly, when turning, workpiece often leaves bearing claw, contact because of centrifugal force instantaneous bearing is ungual and generation is oscillatory. If use 3 bearing to follow one side of workpiece of tool carrier bearing ungually to be touched by lathe tool, make workpiece fluctuation, left and right sides cannot move, the stability when turning, not easy generation is oscillatory. A very crucial question when because this car is fine,looking for an axis is to should apply 3 claw to follow tool carrier. CNC Milling CNC Machining