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Air plasma cutter

A technology of air plasma and cutting machine, applied in the direction of plasma welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of cutting machine cost increase, increase pressure switch, etc., and achieve the effect of low cost

Inactive Publication Date: 2017-03-22
SHANGHAI TAYOR HEAVY IND GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of compressed gas supply method can effectively prevent the nozzle of the cutting machine from burning out due to the low pressure of the compressed gas, but the cost of the cutting machine will increase due to the addition of a pressure switch.

Method used

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Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, the air plasma cutting machine includes a cutting torch, a cutting power supply, a control circuit, and an arc voltage feedback circuit;

[0035] Such as Figure 4 As shown, the cutting torch includes a nozzle 3 and an electrode 1;

[0036] The nozzle 3 is tubular and has an open lower end;

[0037] The electrode 1 is placed in the nozzle 3, and the lower end is located at the opening of the lower end of the nozzle 3;

[0038] The positive and negative ends of the cutting power supply are respectively used to connect the workpiece 8 and the electrode 1;

[0039] The arc voltage feedback circuit is used to collect the arc voltage between the electrode 1 and the workpiece 8;

[0040] After the cutting power is connected between the electrode 1 and the workpiece and the arc 7 is started, if the arc voltage between the electrode 1 and the workpiece is lower than the set voltage, the control circuit controls to cut off the cutting power supply ...

Embodiment 2

[0050] Based on the air plasma cutting machine of Embodiment 1, after the cutting power is connected between the electrode and the workpiece and the arc is started, if the arc voltage between the electrode and the workpiece is lower than the set voltage, the control circuit also controls to close the air valve, Thereby saving compressed air.

[0051] Preferably, after the cutting power is connected between the electrode and the workpiece and the arc is started, if the arc voltage between the electrode and the workpiece is lower than the set voltage, the control circuit also controls the output of an alarm signal to prompt the air plasma cutting machine to work abnormal.

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PUM

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Abstract

The invention discloses an air plasma cutter which comprises a cutting gun, a cutting power supply, a control circuit and an arc voltage feedback circuit. The cutting gun comprises a spray nozzle and an electrode. The spray nozzle is tubular and is provided with an open lower end. The electrode is arranged in the spray nozzle, and the lower end of the electrode is located at an opening of the lower end of the spray nozzle. The positive and negative ends of the cutting power supply are separately used for being connected with a workpiece and the electrode. The arc voltage feedback circuit is used for collecting the arc voltage between the electrode and the workpiece. After the electrode and the workpiece are connected with the cutting power supply and electric arcing is achieved, if the arc voltage between the electrode and the workpiece is lower than the preset voltage, power supply between the cutting power supply and the electrode or the workpiece is controlled to be cut off by the control circuit. According to the air plasma cutter, the phenomenon that the spray nozzle of the cutting gun is damaged due to the fact that the gas pressure is too low is avoided in the using process, a pressure switch does not need to be additionally arranged, and the cost is low.

Description

technical field [0001] The invention relates to cutting machine technology, in particular to an air plasma cutting machine. Background technique [0002] Plasma is a gas heated to an extremely high temperature and highly ionized, which transfers the arc power to the workpiece, and the high heat causes the workpiece to melt and be blown off, forming the working state of plasma arc cutting. [0003] The basic principle of the air plasma cutting machine (the cutting here generally refers to the cutting of metal materials) is to use a very thin and high-temperature plasma arc to melt the local metal rapidly, and then use the airflow to blow away the molten metal. Due to the advantages of high cutting efficiency, low loss and wide application range, plasma arc cutting has been widely used in various engineering construction, manufacturing and other industries. [0004] We usually call the arc with the arc density under natural conditions (uncompressed) as a free arc; the conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K10/00
CPCB23K10/006
Inventor 张慧智王进成王成多蔡涛赵尔新苗金成
Owner SHANGHAI TAYOR HEAVY IND GRP