(CNC) shears, because they are mainly straight-cut, can cut a sheet of up to 4 meters in one knife, but it can only be used in sheet metal processing that only requires straight cutting. It is commonly used in industries where sheet metal cutting, cutting, etc., which only require straight cutting.
(CNC/Brick Tower) Punch has more sensitivity in curve processing. One punch can have one or more sets of square, round or other special request punches, which can process some specific sheet metal work at a time. The most common one is the chassis cabinet industry. The processing technology they request is mainly cutting such as straight lines, square holes and round holes, and the pattern is relatively simple and fixed. They mainly face carbon steel plates of 2mm or less, and the width is usually 2.5mX1.25m. Stainless steel with a thickness of 1.5mm or more is generally not used because of the viscosity of the material. The advantage is that the processing speed of the simple pattern and the thin plate is fast, and the defect is limited when the thick steel plate is punched. Even if the punching is performed, the workpiece has a collapse appearance, the mold is required, the mold development cycle is long, the cost is high, and the flexibility level is not high enough. Foreign steel cutting beyond 2mm is generally more modern laser cutting, instead of using punching machine, the thickness of a thick steel plate is not high when punching and shearing, and the second is thicker steel plate requiring more tonnage of punching, costing resources, three When the steel plate is thick, the noise is too high, which is not conducive to environmental protection.
As the original traditional cutting method, flame cutting has low investment requirements. In the past, the processing quality was not high. When the request was too high, a machining process could be processed, and the market was very large. Today it is mainly used to cut thick steel plates that exceed 40mm. Its defect is that the thermal deformation is too large when cutting, the slit is too wide, the data is too expensive, and the processing speed is too slow, only suitable for roughing.
Plasma cutting and precision 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 processing of the middle plate. Huagong Farley's CNC precision plasma cutting machine has reached the lower limit of laser cutting as the cutting-edge precision of the world's top plasma cutting equipment. It has reached a speed of more than 2 meters per minute when cutting 22mm carbon steel plate. The end face is smooth and flat, and the best slope can be controlled within 1.5 degrees. The defect is that the thermal deformation is too large when the steel sheet is cut, and the slope is also large. When the precision request is high, there is no power and the cost is relatively expensive.
High-pressure water cutting is the application of high-precision water jet doped diamond to cut the sheet metal. It has no restrictions on the material, and the thickness of the cutting can be as much as 100mm. It is also easy to burst when hot cutting is used for ceramics and glass. It can cut, copper, aluminum, etc. can cut the laser high-reflection waterjet, but laser cutting has a big obstacle. The defect is that the processing speed is too slow, too dirty, not environmentally friendly, and the cost is high.
Laser cutting is a process reaction of sheet metal processing, and is the "machining center" in sheet metal processing;
Laser cutting has a high level of flexibility, fast cutting speed, high consumption efficiency, and short product consumption cycle, which has won a common market for customers. Laser cutting has no cutting force, no distortion in processing; no tool wear and good data compliance; whether simple or complex parts, it can be laser-finished and fine-formed and cut quickly; its slit is narrow, cutting quality is good, automation level is high, operation Troublesome, low labor intensity, no pollution; can complete automatic cutting and nesting of cutting, improve the application rate of data, low consumption cost and good economic benefit. The technology has a long effective life. At present, most of the plates that exceed the thickness of 2 mm in foreign countries use laser cutting. Many foreign experts disagree that the next 30-40 years is the golden period of laser processing technology (the direction of sheet metal processing).
Generally speaking, it is recommended to use carbon steel plates within 20mm, stainless steel plates within 10mm, non-metallic materials such as acrylic and wood, and laser cutting. The steel plates within 20-50mm are recommended for plasma cutting, and the thicker steel plates are flame-cut. In the processing of copper, aluminum and other high-reflection materials for lasers and fragile non-metallic materials such as glass and marble, waterjet cutting is used. Manufacturers of chassis cabinets within 1mm use CNC punching machines in large quantities and relatively single sheet metal processing industries. , and then assist other cutting wrists to carry out the cutting process.
First of all, the traditional laser cutting machine as the mainstream uses CO2 laser, which can stably cut carbon steel within 20mm, stainless steel within 10mm, and aluminum alloy below 8mm. Secondly, the fiber laser has obvious advantages when cutting thin plates within 4mm. The effect of the solid laser wavelength is that it is of poor quality when cutting thick plates. Laser cutting machines are not omnipotent. The wavelength of CO2 lasers is 10.6um. The wavelength of solid-state lasers such as YAG or fiber lasers is 1.06um. The former is easy to be absorbed by non-metals. It can cut wood, acrylic, PP and plexiglass with high quality. Non-metallic materials, the latter is not easily absorbed by non-metals, so it is impossible to cut non-metallic materials, but the two lasers are forced to encounter high-reflection materials such as copper, silver, and pure aluminum.
With the rapid development of laser technology and the increasing consumption process, laser cutting is quietly replacing traditional punching and shearing equipment as a fine cutting device, facing dizzy, cumbersome laser cutting machine models, and some merchants messing around. The boasting of the laser cutting machine buyers is even more foggy. Wuhan Honglei Laser put forward the following opinions on the selection of modern laser cutting machine:
From the application scope of laser laser cutting machine and the technical request put forward by users, the future development direction of laser cutting machine is undoubtedly high power, large format, high efficiency, one-time molding and high intelligence. The wide application of wide-format series in the locomotive industry and heavy industry has brought high-efficiency and high-quality consumption power to users; high-speed and high-precision series cutting machines are widely used in engineering machinery and high value-added production and operation industry; as a foreign processing industry, super A cost-effective cantilever laser cutting machine is the best choice.
In addition, the flexible processing system of fiber lasers with robots has a long history in the automotive industry and supporting industries. In the past, it was monopolized by foreign integrators. In recent years, due to the financial crisis and the consumption technology of the automobile industry, many foreign cars have been upgraded. High-end brands and national brands taste crabs, and the arrogance and mystery of foreign high prices have been unveiled and torn. In recent years, car body-in-white welding, car dashboard laser weakening, car airbags have been provided to car users in recent years. Laser welding, car bumper, door, center column and other robotic flexible cutting machine, car bumper laser welding, automobile exhaust pipe online welding system, automotive variable gear set laser automatic cutting equipment, etc., stable and efficient consumption at the user's site for 24 hours It can be seen that domestic enterprises have already possessed certain strength.
There are many factors to be considered in the selection of laser cutting machine. In addition to thinking about the maximum size, material, maximum thickness of the required cutting and the size of the original data, more needs are considered in the future direction, for example, The maximum workpiece size to be processed after the technical modification of the product, and the format of the information provided by the steel market, which is the most material for the product, the loading and unloading time, and so on. The laser cutting machine is a modern equipment with high input and high output. Saving one minute per time may mean earning more than ten yuan. The current status of laser cutting machines is also a key point for laser cutting machine buyers. The fierce market competition must try to prevent homogenization competition.
In the railway locomotive, heavy industry, engineering machinery and other industries, the contours of the parts to be processed are not too complicated. In order to enhance the processing ability and efficiency, the wide-format series is recommended. The width is usually 3-4.5 meters wide and the length is 6-30 meters. It can complete one-time processing of medium and heavy plates, saving time and materials. When the thickness of the workpiece exceeds 20mm, the wide-format and precision plasma (thickness over 45mm plus flame cutting) common rail cutting equipment is the best choice. It is suitable for processing steel plates of 3-50mm or even thicker. The simultaneous cutting of thin and thick plates will greatly improve the processing efficiency. For local small workpieces, the high speed and high precision series is the best choice.