A high-speed ball screw pair double nut pretightening force control device and method

Abstract

The present invention discloses a high-speed ball screw pair double-nut pretightening force control device and method. A pair of nuts is arranged on the screw, and sector cavities connected with a temperature control system are distributed around the pair of the nuts; the I-type piece between a pair of nut pretightening end is provided with a fine tuning screw configured to regulate a pair of nut pretightening end pretightening force; and the I-shaped piece is connected with a work table, a press sensor connected with a collection processing module and a computer is arranged between the pair of the nut pretightening end and the I-shaped piece, the temperature control system is controlled by a computer to regulate the flow speed of the sector cavity liquid and change the temperature of the leading screw nut so as to realize the control for the leading screw double-nut pretightening force. The high-speed ball screw pair double-nut pretightening force control device is able to perform real-time detection and regulation of non-uniform pretightening force. The high-speed ball screw pair double-nut pretightening force control device is used for performing pretightening force changing state monitoring system and identifying vibration signals of the screw nuts in the state of different pretightening forces through the computer to realize pretightening force changing state monitoring. The high-speed ball screw pair double-nut pretightening force control device and method are simple in structure and high in feasibility and has a certain intelligent degree.

Description

technical field [0001] The invention belongs to the technical field of motion precision research of a feed system of a high-speed, high-precision metal cutting numerical control machine tool, and specifically relates to a high-speed ball screw pair double-nut pretightening force control device and method. Background technique [0002] The research on motion accuracy of the feed system of high-speed CNC machine tools is the basis for realizing high-speed and high-efficiency cutting of metal cutting machine tools and improving the surface processing quality of workpieces. As a key component of linear motion, its preload is of great significance for improving the stiffness and motion accuracy of the feed system. During the high-speed movement of the feed system, the friction of the screw nut generates a large amount of heat to deform the screw nut, and this thermal deformation is uneven, resulting in uneven changes in the pre-tightening force between the double nuts of the scre...

AI Technical Summary

Problems solved by technology

The feed system of the machine tool cannot manually adjust the pre-tightening force of the screw nut during high-speed motion. The automatic adjustment of the pre-tightening force is feasible, but the automatic adjustment of the pre-tightening force by using the giant magnetostrictive brake is affected by environmental factors Large, inconvenient to install, high cost

Images