Ball screw in general need to put forward what technical requirements?
Basically has the following several aspects
1, Geometric precision, including stroke deviation test, jitter check, positional tolerance test. Stroke deviation includes targeted stroke tolerances, effective stroke compensation value, the amount of variation within the effective stroke, stroke deviation within one revolution. Jitter deviation includes thread diameter of the axis radial runout, journal circle runout, shaft shoulder circle runout, mounting end face with nut preload of axis circle runout.
2, Material and heat treatment.
3, Magnitude of preload, pre-tensioning load.
Ball screw produced by professional manufacturers, if no special requirements, as long as its accuracy class and geometric dimensioning is given.
Ball screw structure:
The ball screw nut is rotary motion convert into linear motion of commonly used transmission device. With the balls rolling instead of the sliding of ball screw nut, the friction is small, has good performance.
The composition of ball screw: mainly consists of the screw, nut, ball and circulators, labyrinth seals, oil hole and other components. How it works: the screw and nut processed with arc spiral groove, when they suit together to form a spiral raceway, and filled with balls in the raceway. The ball is rolling along the raceway, and for the cycle of circular motion by a circulator. Both ends of the circulator also played the role of stopper beads, to prevent the ball from falling out along the raceway.
Source: http://www.machineballscrew.com Ball Screw And Parts.
No comments:
Post a Comment