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Six commonly used cutting processes

The six commonly used cutting processes, as traditional cutting equipment, mainly include (CNC and non CNC) automatic saws, punches, flame cutting, plasma cutting, high-pressure water cutting, and other means. These devices have a considerable market share in the market. Firstly, they are well-known and secondly, they are cheap. Although they have obvious disadvantages compared to modern processes such as laser cutting, they also have their own unique advantages.


First type: (CNC) automatic saw

When cutting off common hardware metal materials such as copper, iron, aluminum, and stainless steel on the market (round bars and profiles), we usually consider their operational safety, universality, stability, efficiency, accuracy, and cost-effectiveness.

Its advantages are: high degree of automation, high precision, smooth and bright cutting surface, and simple operation; Compared to other cutting processes on the market, its price is low and its versatility is high; For example, when cutting round bars with an outer diameter of 1.0mm to 20mm, it can be universally completed on one device; For example, when cutting irregular materials, such as hexagonal bars, triangular bars, or other complex shapes, they can be universally completed on one device.


Second type: (CNC/turret) punching machine

There is more flexibility in curve machining. A punch can have one or more sets of square, circular, or other special requirements of punches, which can process specific sheet metal workpieces at once. The most common is in the chassis and cabinet industry, where the processing techniques required are mainly cutting straight lines, square holes, circular holes, etc., with relatively simple and fixed patterns. They mainly face carbon steel plates with a width of less than 2mm, usually 2.5m × 1.25m. Stainless steel with a thickness of over 1.5mm generally does not use a punch due to the high viscosity of the material and the cost of the mold.

Its advantages are: fast processing speed for simple shapes and thin plates,

The disadvantage is that the ability to punch thick steel plates is limited, and even if it can be punched, the surface of the workpiece will collapse, requiring a long mold development cycle, high cost, and insufficient flexibility. The cutting and processing of steel plates exceeding 2mm in foreign countries generally use more modern laser cutting instead of punching machines. Firstly, the surface quality of thick steel plates during punching and shearing is not high. Secondly, punching thick steel plates requires a larger tonnage punching machine, which wastes resources. Thirdly, the noise during punching thick steel plates is too loud, which is not conducive to environmental protection.

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Third type: flame cutting

As the initial traditional cutting method, due to its low investment, the requirements for processing quality were not high in the past. When the requirements were too high, adding another machining process could solve the problem, and the market share was very large. Now it is mainly used to cut thick steel plates exceeding 40mm.

Its disadvantages are: excessive thermal deformation during cutting, too wide cutting seams, waste of material, and slow processing speed, which is only suitable for rough machining.


Fourth type: plasma cutting&fine plasma cutting

Similar to flame cutting, the heat affected zone is too large, but the accuracy is much greater than flame cutting, and the speed has also made an order of magnitude leap, becoming the main force in plate processing.

The actual cutting accuracy of the top CNC precision plasma cutting machine in China has reached the lower limit of laser cutting, reaching a speed of over 2 meters per minute when cutting 22mm carbon steel plate. The cutting end face is smooth and flat, and the best slope can be controlled within 1.5 degrees,

Its disadvantages are that when cutting thin steel plates, the thermal deformation is too large, the slope is also large, and it is powerless when precision requirements are high, and consumables are relatively expensive.

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Fifth type: high-pressure water cutting

It uses high-speed water jet mixed with diamond sand to cut sheet metal. It has almost no restrictions on the material, and the cutting thickness can also reach over 100mm. It can also cut materials such as ceramics and glass that are prone to cracking during thermal cutting. Copper, aluminum, and other materials with high laser reflection can be cut by water jet, but laser cutting has significant obstacles.

The disadvantages of water cutting are: the processing speed is too slow, too dirty, not environmentally friendly, and the consumables are also high.

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The sixth type is: laser cutting

Laser cutting has a high degree of flexibility, fast cutting speed, high production efficiency, and short product production cycle, which has won a wide market for customers. Laser cutting without cutting force, processing without deformation; No tool wear, good material adaptability; Whether it is a simple or complex part, it can be precisely and rapidly formed and cut with a laser in one go; Its cutting seam is narrow, the cutting quality is good, the degree of automation is high, the operation is simple, the labor intensity is low, and there is no pollution; It can achieve automatic cutting layout and nesting, improve material utilization, reduce production costs, and achieve good economic benefits.

Its drawbacks are: taking fiber laser as an example, most machines are priced at over 1.5 million yuan, and low-power ones are basically around 500000 yuan. During cutting, due to the fine slits of the fiber, the gas consumption is huge (especially in nitrogen cutting). In addition, fiber laser cutting machines are difficult or even unable to cut high reflective materials such as aluminum and copper plates, and the speed is very slow when cutting thick plates.

Mr. Zhu
159 1686 0579
Inside Jixin Factory, No.1 Shenshui Road, Tiesong Village, Qingxi Town, Dongguan City, Guangdong Province
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