How to solve the problem of too long precision life of ball screw? How to restore the precision of t

Ball screw is usually used for precise positioning. The high mechanical efficiency, low transmission torque and axial clearance are almost zero, making the ball screw become an important device in the tool positioning and aircraft aileron driven applications. However, resistance and heat generated by continuous work may cause great friction and positioning errors. When long time continuous use or improper lubrication will wear out the gap, the processing error will increase.

The design factors that increase friction in ball screw also increase torque, and in turn affect positioning accuracy. When the ball is pressed between the ball screw nut and the screw shaft, the wedge effect is a potential friction source. When rotating, the ball is usually pressed against the nut. When reversing, the ball is pressed against the shaft of the screw. Because the sliding friction coefficient is much larger than the rolling friction coefficient (not moving 0.1 to 0.3, rolling 0.001 to 0.003), the wedge effect greatly increases the torque.

When the ball screw shaft vibrates at a fixed angle, the torque caused by extrusion is particularly troublesome. This motion can cause vibration torque, and it is difficult to completely eliminate the use of very precise parts. However, by using Goethe arches instead of circular groove trenches or by reducing the stiffness of ball screws, this torque can be reduced to a minimum. Goethe arch has a better V shape with better circulation.

When the ball screw can not meet the accuracy requirement, how should the operator handle it?

The ball screw has accepted the test of precision when entering the warehouse. It can directly eliminate the problem of the product itself, but it is necessary to remember that the wire rod of the machine tool should be placed vertically when it is preserved. This is to prevent the precision value of the precision when the ball screw is placed under the influence of gravity.

When high precision ball screws appear related problems, they should:

1 after using the hinged hinges, we must leave the allowance for the finishing stranding and then hand twist.

The advantage: this method can correct the taper error after the machine hanging, reduce the roughness of the surface of the hole wall, and increase the precision of the contact surface in order to ensure enough friction torque.

The cone pin should be used regularly when 2 stranded holes are made

Advantage: the ball screw is easy to control the aperture of the hinges.

3 actively do well in the action process of the surface dust prevention of the ball screw rod and so on, the dust prevention measures should be done well on the surface of the silk rod. At this time, the clean cloth should be used and the naked part of the silk rod is wrapped up in order to prevent dust into the transmission surface of the silk rod, so as to prolong the service life of the precision element, and at the same time, improve the use of the precision element. The precision of assembly ensures the quality of the product.

To identify the accuracy and true and false of the ball screw can be used as a dial meter, in the horizontal platform, respectively at both ends and the center of the test, if the 300 within the beating of the 0.02 in the accuracy is in C3, that means that the ball screw is no problem, you should check to see if the coaxiality of their own machine is not adjusted. Or the problem of the ball screw! In addition, see what brand of the ball screw you bought, C3 should be grind grade, as long as it does not buy cold rolled wire, cold rolling is not that high precision.