Numerical control plasma flame cutting machine

Abstract

The invention discloses a numerical control plasma flame cutting machine, which comprises a longitudinal bracket, a transverse bracket, a follow-up mechanism and a control system. The follow-up mechanism comprises a plasma follow-up mechanism and a flame follow-up mechanism; the plasma follow-up mechanism and the flame follow-up mechanism are respectively provided with a vertical step motor and a transverse step motor which respectively drive a cutting gun to move vertically and transversely; the control system comprises a microcomputer, a cutting gun lifting control module, a follow-up mechanism transverse subdivision control module, a longitudinal bracket longitudinal subdivision module, a capacitance transmitting module, an arc-voltage voltage dividing module and a follow-up mechanism vertical driving module; the transverse bracket is provided with two sets of plasma follow-up mechanisms or two sets of flame follow-up mechanisms; the microcomputer is connected with the transverse step motor of the follow-up mechanism; the cutting gun lifting control module is connected with a capacitance inducting ring, a workpiece and the plasma cutting gun; and the follow-up mechanism vertical driving module is connected with the vertical step motor of the follow-up mechanism. The numerical control plasma flame cutting machine has strong interference resistance capability; a cutting power supply is economical; and the vertical displacement precision of the follow-up mechanism is high.

Description

technical field [0001] The invention belongs to the electromechanical field, and in particular relates to a numerical control plasma flame cutting machine. Background technique [0002] In the field of metal processing, the cutting of sheet metal is usually carried out with plasma or flame cutting machines or plasma flame cutting machines. At present, domestic and foreign plasma flame cutting machines mainly use DC motor as the driving device of the servo mechanism, and use analog quantity control method to adjust the vertical distance between the plasma or flame cutting torch and the workpiece; Short service life leads to low product service life and high maintenance cost; especially important is that the magnetic field generated by the DC motor will further increase the interference to the system, so the requirements for the plasma cutting power supply are high; and the analog control technology it adopts There is also strong interference from common plasma cutting power ...

AI Technical Summary

Problems solved by technology

At present, domestic and foreign plasma flame cutting machines mainly use DC motor as the driving device of the servo mechanism, and use analog quantity control method to adjust the vertical distance between the plasma or flame cutting torch and the workpiece; Short service life leads to low product service life and high maintenance cost; especially important is that the magnetic field generated by the DC motor will further increase the interference to the system, so the requirements for the plasma cutting power supply are high; and the analog control technology it adopts There is also strong interference from common plasma cutting power sources, which will further affect the accuracy of its height control and even malfunction

Due to the above reasons, as long as the workpiece is slightly uneven or artificially uneven during the cutting process, it needs to be stopped for adjustment, which eventually leads to non-continuous cutting, low efficiency, waste, wasted steel plates, and poor cutting quality of the workpiece

Images