Method for reducing cutting overburning of straight flame cutting machine and gas channel

Abstract

The invention relates to a method for reducing cutting overburning of a straight flame cutting machine. The invention is characterized in that when in closed cutting, a cutting oxygen inlet valve is firstly closed, and meanwhile, cutting oxygen from the cutting oxygen inlet valve to every flame cutting gun is quickly discharged, so that the cutting oxygen no longer takes effect; and a heating oxygen inlet valve and a combustible gas inlet valve are orderly closed until the flame goes out. The invention also relates to a gas channel for realizing the method, which comprises a control device, a cutting oxygen gas channel, a heating oxygen gas channel and a combustible gas channel, wherein the three gas channels are respectively orderly connected with a pressure relief valve, an inlet valve and a separation panel after the respective gas inlet, and the separation panel is connected with gas pipes of the flame guns. The gas channel is characterized in that the separation panel of the cutting oxygen gas channel is connected with an exhauster; and the inlet solenoid valve and the exhauster of each gas channel are controlled by the control device. Compared with the method and gas channel before improvement, the invention does not have the phenomenon of overburning in the cutting process, and does not produce any noise in the exhaust process, thus, the improvement is successful.

Description

technical field [0001] The invention belongs to the technical field of numerically controlled flame cutting machines, and in particular relates to a method and an air path for reducing overburning of a straight flame cutting machine. Background technique [0002] In the mechanical processing industry, with the continuous development of the cutting industry and technology, the requirements for blanking of various plate parts are getting higher and higher. Among various automatic cutting systems, CNC flame cutting is the most cost-effective application. most common. [0003] In the CNC flame cutting machine, in the cutting process in which multiple flame guns cut a steel plate into multiple longitudinal straight strips, the cutting efficiency is high and the cost is low compared with other mechanical processing methods. Due to the symmetrical and uniform heating of the segmented steel plate in the longitudinal direction, the deformation is small, and it has become an irreplac...

AI Technical Summary

Problems solved by technology

[0006] If only the main solenoid valve for cutting oxygen is closed when the cutting is finished, because the pipeline from the main valve to each flame gun is long, the oxygen consumption in this section of the gas pipe will take a while to cause overburning phenomenon in the cutting (that is, due to cutting oxygen, preheating Hot oxygen and gas are burning at the same time, the cutting is still effective and causes over-cutting);

[0007] Due to the large number of gas flame heads and high oxygen consumption during cutting, the heat is high during cutting, and it is impossible to manually close the hand valve at the gun end, and the hand valve at the gun end corresponds to a steel plate with a fixed thickness. Try not to close it manually

Images