According to the cutting energy and process methods used in the cutting, the numerical control cutting can be divided into several types such as numerical flame cutting, CNC plasma cutting, CNC laser cutting, and digital control line cut.
1, wire cutting
The wire cut is also known as the electric spark processing. It is a metal wire as a negative electrode, and the workpiece of the conductive or semiconductive material relies on an electric spark discharge, so that the workpiece is constantly electrically etched. The wire is constantly moving (lower), and the workpiece is moved to the moving member under the drive of the CNC system, thereby completing the size processing of the workpiece. The wire cut is generally cutting speed of 30-50mm2, which is very slow, but its processing accuracy and high degree of finish are high, which belongs to finishing categories, and is widely used in parts such as abrasive.
2, laser cutting
The laser cutting is a processing method for thermal cutting using high energy laser beam as a "cutting tool". Cutting of metals, non-metal sheets, etc. can be realized. The laser cuts can be divided into a gas laser cutting and solid laser cutting. The laser cutting speed is fast and the processing precision is high. The thickness of the laser cut is determined by the power of the laser generator. High-power laser generator, currently relying on imported, high prices, the price of CNC laser cutting machine is also very expensive. Generally, the price of a CNC laser cutting machine with a thickness of 12 mm is typically priced for more than 2 million.
3, high pressure water jet cutting
High-pressure water jet cuts, after boiling water to ultra high pressure (100-400 MPa), shot by throttling small hole (110.15-0.4mm), with high-speed high-intensive water jet (or addition of abrasive) The role is cut.
Various metals and non-metallic materials can be cut by high pressure water jets. Water jet is cut, it is not very common.
4, plasma cutting
Plasma cutting is the use of high-energy density plasma arc and high-speed plasma flow, blowing the dissolved metal from the sproker to form a continuous cutout. Plasma cutting, can cut a variety of metal materials such as carbon steel, stainless steel, copper, aluminum or some non-metallic materials. Its cutting speed is fast and the heat is small, but the width of the cutting and cutting surface is large. And the cutting of the cutting and cutting of the plasma cutting power supplied by different manufacturers (the width and the slope of the cutting angle) differ.
Plasma power is also called a plasma cutting machine. According to the quality of the sprogem, it can be divided into three kinds of common plasma, fine plasma, laser plasma (cutting mass close to laser cutting). Ordinary plasma cut mouth is typically 15 degrees, fine plasma is generally 5 degrees, and the laser plasma can be controlled to 3 degrees. Take the plasma power of 100A current as an example, the domestic price of 4,000-12,000 yuan, the Chinese and foreign joint venture price is 20,000 to 30,000 yuan. Imported US sea treasure price of 35,000.
Fine plasma and class laser plasma, generally 150,000 to 300,000.
5, flame cutting
The flame cutting is a method of preheating the workpiece cut to a certain temperature with oxygen and gas (acetylene, propane, liquefied gas, etc.), and then discharges the high-speed cutting oxygen stream to make the preheating metal combust to achieve the cutting method. The process of flame cutting, essence is the process of burning in pure oxygen, is not a melting process.
The whole flame cutting process is divided into the following four stages:
2 The metal surface of the cut point is heated to the combustion point with a hot flame, and the combustion reflection is started in the cutting oxygen.
2 Burning reflects progress to the lower layer of the metal.
3 exclude combustion reflecting the generated slag.
4 Heat the metal upper layer of the cutting lead to the combustion point using the heat of the slag and the preheating flame, so that the combustion reflection is continued to produce the oxygen.
Only FE, low carbon steel, Mn, Ti and other materials have better flame cutting properties, high carbon steel, cast iron, stainless steel, non-ferrous metals, etc., can not cut with flames. Flame cut adaptation to cutting thickness is 5 mm or more, generally can be cut to 200 mm, or even thicker. For different sheet thicknesses, the corresponding model of the mouth must be selected. As the plummet is increased, the cut oxygen pressure used should also be increased accordingly. In various cutting methods, the CNC flames and plasma cuts occupy most specific gravity due to various factors such as cutting efficiency, equipment cost.
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