We all know that the spiral rotation in CNC precision parts processing is rented by three parts: screw, nut and frame, and our spiral rotation is divided into three types, namely force transmission spiral rotation, transmission spiral rotation and Adjust the spiral rotation, here is not too much to describe the composition of the spiral rotation, interested friends can go to Baidu Encyclopedia to understand, today we focus on understanding the calculation method of the relationship between the spiral rotation movement in CNC precision parts processing.
In precision machining, in the spiral transmission, the rectangular lead screw and the untoothed lead screw are used for the transmission force. Trapezoidal screws are used to transmit power and also to transmit motion. Static pressure screw and liquid ball wire are mainly used for communication movement. It is difficult to process and install the static pressure screw, and it also requires a complicated oil supply system, which limits its use.
At present, ball screws are mainly used in precision machining transmission, which is an important part of precision transmission and positioning. Liquid ball screws are not only used for precision transmission. It can also be used for precise positioning, which can change the angular displacement of rotation into linear displacement.
For example, if you install a dial or an encoder on one end of a CNC precision machined ball screw, the relationship between the spiral motion is:
In the formula, Q is the angle of the lead screw;
△p is the axial displacement corresponding to the rotation angle of the screw;
p-The pitch of the lead screw is set to 1mm.
When Q is 1°, △p=0.003mm, and the circle scale is less than 1°, then the axial movement of 0.001mm or less can be easily distinguished.
CNC machine tools, machining centers, measurement centers, precision automatic measuring instruments, automatic mechanical controls, etc. all use ball screw transmission surfaces to achieve high-efficiency, high-precision, and high-sensitivity transmission. At present, the ball screws have been standardized and serialized, and are produced by professional CNC processing custom manufacturers.