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目前主要的热切割技术有氧气切割、激光切割和等离子弧切割。在0.1～30mm厚的钢材切割中,等离子弧切割应用已越来越走向主流地位。这是它不断向高效,优质、低成本发展的结果。一、等离子弧切割方法等离子弧切割方法很多。可以作为形成等离子弧的工作气体已有氩、氢、氮、氧、空气、水蒸气及某些混合气体和水。从当前应用角度分析可以作如下归纳: 1.一般各种金属薄板(0.1～30mm)的切割采用空气等离子弧切割最为合适。 2.要求高速和高质量切割碳钢和低合金钢时,选用氧等离子弧和氧-水再压缩等离子弧切割为最佳。 3.要求优质切割不锈钢和铝合金时,选用氩-氢和氮-水再压缩等离于弧切割为宜。 4.对环境污染要求高的厚板切割时,选用水再压缩等离子弧切割为适合。二、等离子弧切割设备的发展趋势等离子弧切割设备发展趋势可归纳为如下几点:
At present the main thermal cutting technology oxygen cutting, laser cutting and plasma arc cutting. In the 0.1 ~ 30mm thick steel cutting, plasma arc cutting applications have become increasingly mainstream. This is the result of its continuous high-quality, low-cost development. First, the plasma arc cutting method A lot of plasma arc cutting. Argon, hydrogen, nitrogen, oxygen, air, water vapor, and some mixed gases and water are available as working gases for plasma arc formation. From the perspective of the current application can be summarized as follows: 1. General cutting of various metal sheets (0.1 ~ 30mm) using air plasma arc cutting the most appropriate. 2. When high-speed and high-quality cutting of carbon steel and low-alloy steel is required, oxygen plasma arc and oxygen-water recompression plasma arc cutting are the best choice. 3. Require high-quality cutting stainless steel and aluminum alloy, the choice of argon - hydrogen and nitrogen - water and then compressed in the arc cutting is appropriate. 4. On the environmental pollution demanding thick plate cutting, the choice of water and then compressed plasma arc cutting suitable. Second, the development trend of plasma arc cutting equipment Plasma arc cutting equipment trends can be summarized as follows: