In the electromechanical system of the CNC rotary tool holder, the main parts are the worm gear, the screw nut, and the upper and lower ends. The working principle of the tool holder indexing is as follows: (1) The CPU sends a forward rotation signal from the CPO. The electric control system turns on the indexing motor, rotates the worm wheel through the reduction gear and the worm, and drives the middle screw shaft and the sleeve to rotate counterclockwise. At this time, since the end sprocket is in the meshing state, the nut cannot be rotated, and when the screw is rotated, the nut is caused to have an upward axial lifting motion, thereby driving the upper turret and the spur to generate the upper movement. (2) When the round sleeve rotates 120 degrees counterclockwise, the toothed disc should be completely disengaged. At this time, the steel ball enters the groove accurately. Under the screw shaft, the upper knife holder starts to index. (3) When the upper tool post is turned to the required tool position (rotation 90, 180 or 270), the detection switch K sends an in-position signal to the CUP. After the detection program is confirmed twice, the CPU sends a motor reversal signal from the PC1, and the axis passes. The sleeve and the steel ball drive the upper tool holder to start the reverse movement. (4) During the reverse process of the upper tool post, the opposite pin first collides with the lower tool post, so that the upper tool post stops and completes the rough positioning; the upper tool post starts to descend axially under the motor, and the tooth The disc enters the meshing fine positioning and starts to clamp. When the predetermined clamping time is reached, the CPU cuts off the reverse signal and the entire tool post indexing process ends. Reliability measures in the hardware design of the control system: The control system consists of interface circuit and high-power control. The interface circuit sends forward and reverse signals from PC0 and PC1. The intermediate relays K1 and K2 are controlled by the optical coupling chip TLP521, and then K1. The K2 contact controls the AC contactors K3 and K4 to make the three-phase asynchronous motor M3 forward or reverse. In the interface circuit, K is the tool holder in-position detection switch. After the photoelectric coupling is turned on and off, the PC2 inputs 0 and 1 signals to the CPU. (Finish) Injection Molding Machine,Injection Moulding Machine For Crate Products,Injection Moulding Machine For Pvc Fitting Products,Injection Moulding Machine For Pet Products Zhejiang Golden Eagle Plastic Machinery Co.,Ltd , https://www.goldeneagle-machinery.com