Control system of numerical control machine tool

Abstract

The invention relates to a control system of a numerical control machine tool. The control system comprises an MCU controller, a stepping motor, a lead screw, a machine tool working table, a main shaft, a tool and bearings. An instruction pulse output by the MCU controller is connected with the stepping motor. A drive shaft of the stepping motor is connected with and provided with the lead screw. The two ends of the lead screw are connected with and provided with the bearings. The lead screw and the machine tool working table are matched and connected with each other. A main shaft box is arranged above the machine tool working table. A feeding instruction signal output by the MCU controller controls and drives the motor through a pulse distributor. In addition, a speed detector and a position detector are arranged, the position detector is connected with a position comparator through a signal line, and the speed detector is connected with the speed controller through a signal line. Transmission error in a whole mechanical transmission chain from the motor to the machine tool working table is eliminated through feedback, and therefore the accurate position of the machine tool working table is obtained; the control system is convenient to control, simple in structure and low in price.

Description

technical field [0001] The invention relates to the technical field of control systems of numerical control machine tools, in particular to a control system of numerical control machine tools. Background technique [0002] CNC machine tools are high-tech machine tools with high machining accuracy and stable loading quality. They can perform multi-coordinate linkage and process parts with complex shapes. The existing CNC machining center has the following problems: (1) The positioning accuracy and rotation accuracy are low, and the dynamic rigidity is poor, so that the processed products have low dimensional accuracy, large shape and position errors, and poor surface accuracy, which cannot meet product quality requirements. Increase superfinishing and polishing process. (2) Insufficient rigidity of the machine tool produces vibration, making it impossible to perform high-speed and powerful grinding. (3) Friction and wear cause poor precision retention, many faults and sho...

AI Technical Summary

Problems solved by technology

The existing CNC machining center has the following problems: (1) The positioning accuracy and rotation accuracy are low, and the dynamic rigidity is poor, so that the processed products have low dimensional accuracy, large shape and position errors, and poor surface accuracy, which cannot meet product quality requirements. Added superfinishing and polishing process

(2) Insufficient rigidity of the machine tool produces vibration, making it impossible to perform high-speed powerful grinding

(3) Friction and wear cause poor precision retention of machine tools, many faults, and short service life

(4) The structure of the grinding wheel shaft and the workpiece shaft is outdated, which can no longer meet the current high-speed and powerful grinding requirements

(9) The manufacturing accuracy and component wear of the feed transmission system, and the lack of corresponding monitoring and compensation, make the size distribution of batch processed products too large, which is not conducive to size grouping and assembly

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