滚珠丝杆间隙题目发生的启事(国外英文资料).docVIP

滚珠丝杆间隙问题发生的原因(国外英文资料) In recent years, more and more of the ball screw is used in a wide variety of machine tools to satisfy the demand of high precision and high performance equipment, ball screw has become one of the most widely used transmission components. In CNC machines, using the ball screw can increase its positioning accuracy and extend its service life. On traditional machines, the ball screw also gradually replaces the kum screw. ???? The ball screw usually matches the prepressure to remove the backspace of the machine, but if the ball screw is improperly installed, it cant show its high accuracy and long life No prepressure or underpressure ? ? ? Without the ball screw preloading vertically. Nut would turn down due to the weight of itself, without preloading of the screw will be a gap, therefore can only be used for small resistance of the machine operation, but the main is based on the requirements of the positioning accuracy without too much. ? ? ? Ball screw factory in different application places when they are given the right amount of preloading, and before they go out to adjust the preloading: so when you order please give details of equipment operation condition before ball screw. The reverse displacement is too big ? ? ? The screw is small, the rigidity is higher, the limit of the slenderness ratio is usually below 60 (the relation of precision and slenderness ratio refer to table 1 slender ratio and accuracy table). If the elongated ratio is too large, the bolt will cause self-weight drooping. If the ball screw is supported only by side, this design is less rigid and should be avoided as possible. The bearing is misused ? ? ? With ball screw must usually oblique bearing. Especially in high stress Angle design of the bearing to the better choice: when the ball screw axial load under normal deep groove roller bearing among will produce a certain amount of axial gap. Therefore deep groove ball bearing is not applicable to this. Improper installati