What are the functions of the drive system that contains the transmission links?
Blind, can you elaborate some more?
According to the ball back to the different ways can be divided into two kinds of internal circulation and external circulation: (1) within the cycle of the ball in the cycle of the screw is always in contact with the surface. The advantage of the inner circulation is that the loop of the ball cycle is short, the fluidity is good, the efficiency is high, the radial dimension of the nut is also small, but the manufacturing precision is high. (2) the outer circulation of the ball in the reverse direction when leaving the screw thread raceway, in the nut body or in vitro for circular motion. External circulation structure is simple, easy to manufacture, but the radial size, and the elbow at both ends of the wear resistance and impact resistance is poor. The common machine tool drive is screw and nut drive table movement, screw and nut easy to produce gaps, the operation of poor precision, unstable work, the product is likely to cause errors.
CNC machine tool feed system is generally used to improve the ball screw nut nut pair to improve the friction characteristics. Ball screw is a pair of screw and nut between the ball as a rolling body of the original spiral drive. Its working principle is: when the screw relative to the nut rotation, both the occurrence of axial only, and the ball can flow along the raceway.
