Punch
Punch has more flexibility in curve processing. One punch can have one or more sets of square, round or other special requirements. It can process some special sheet metal workpieces at one time. The most common one is the chassis. In the cabinet industry, the processing technology they require is mainly straight, square holes, round holes and the like, and the pattern is relatively simple and fixed. The advantage is that the processing speed of the simple pattern and the thin plate is fast, and the disadvantage is that the capacity of the thick steel plate is limited, and even if the punching is performed, the surface of the workpiece is collapsed, the mold is required, the mold development cycle is long, the cost is high, and the degree of flexibility is not high enough. Foreign steel cutting of more than 2mm generally uses more modern laser cutting instead of punching. The surface quality of a thick steel plate is not high when punching and shearing. The second thick steel plate requires a punch with a larger tonnage, which wastes resources. When the steel plate is thick, the noise is too high, which is not conducive to environmental protection. Flame cutting As the original traditional cutting method, flame cutting has low investment requirements. In the past, the processing quality was not high. When the requirements were too high, a machining process could be solved, and the market holding amount was very large. It is now mainly used to cut thick steel plates over 40mm. Its disadvantage is that the thermal deformation is too large when cutting, the slit is too wide, the material is wasted, and the processing speed is too slow, only suitable for roughing. Plasma cutting Plasma cutting and fine plasma cutting are similar to flame cutting. The heat affected zone is too large, the precision is much larger than the flame cutting, and the speed has an order of magnitude leap. It has become the main force in the middle plate processing. The actual cutting precision of the domestic top-grade CNC fine plasma cutting machine has reached the lower limit of laser cutting. When cutting 22mm carbon steel plate, it has reached a speed of more than 2 meters per minute, and the cutting end face is smooth and flat, and the slope is the best. The control is within 1.5 degrees. The disadvantage is that the thermal deformation is too large when cutting the steel sheet, the slope is also large, and there is no power when the precision is high, and the consumables are relatively expensive. High pressure water cutting High-pressure water cutting is the use of doped diamond in high-speed water jet to cut the sheet metal. It has almost no restrictions on the material, and the thickness of the cutting is almost 100mm. It is also easy to burst when hot cutting is used for ceramics and glass. Can be cut, copper, aluminum, etc. can be cut for laser high-reflection material waterjet, but laser cutting has a big obstacle. The disadvantage of water cutting is that the processing speed is too slow, too dirty, not environmentally friendly, and the consumables are also high.
Laser cutting
Laser cutting is a technological revolution in sheet metal processing and a "machining center" in sheet metal processing. Laser cutting has a high degree of flexibility, high cutting speed, high production efficiency and short production cycle, which has won a wide market for customers. Laser cutting without cutting force, no distortion in processing; no tool wear, good material adaptability; whether simple or complex parts, laser can be used for precision and rapid prototyping; its slit is narrow, cutting quality is good, automation is high, operation Simple, low labor intensity, no pollution; can realize automatic cutting and nesting of cutting, improve material utilization rate, low production cost and good economic benefit. The technology has a long effective life. At present, most of the super-structured 2 mm plates are laser-cut in foreign countries. Many foreign experts agree that the next 30-40 years is the golden age of laser processing technology development (the direction of sheet metal processing development) .