Application of laser cutting machine in sheet metal processing

Following the rapid development of Shanghai sheet metal processing technology, the domestic processing technology is changing with each passing day, and the gap between foreign and foreign countries is getting smaller and smaller. Many well-known foreign-funded enterprises have transferred their manufacturing bases to China, together with sheet metal processing belts. There are many ideas of resistance.

As a traditional sheet metal cutting device, there are first (CNC and non-CNC) shearing machines, punching machines, flame cutting, plasma cutting, high pressure water cutting and other wrists. These devices occupy a considerable share of the mall in the mall, one is well known, and the other is cheap, of course, they are very advantageous in relation to modern processes such as laser cutting, but they also have their own advantages. .

(CNC) shears, because of their primary linear cutting, can of course cut a sheet of up to 4 meters, but it can only be used in sheet metal processing that requires only straight cuts. It is generally used in the career of cutting straight cuts, etc., which are only required to cut straight.

(CNC/Brick Tower) Punch has more sensitivity in curve processing. One punch can have one or more sets of squares, circles or other specially requested punches, which can process some specific sheet metal work at a time. The most common is the chassis cabinet occupation. The processing technology they are begging for is mainly the cutting of straight lines, square holes, round holes, etc. The pictures are relatively simple and fixed. They are primarily faced with carbon steel plates below 2mm, and the width is generally 2.5mX1.25m. Stainless steel with a thickness of 1.5mm or more is generally not used because of the viscosity of the raw material. Its strength is that it has a fast processing speed for simple graphics and thin plates. The disadvantage is that it can only be limited when punching thick steel plates. Even if it can be punched, the surface of the workpiece will fall, the mold is required, the mold development cycle is long, the cost is high, and the level of flexibility is not high enough. Exceeding 2mm or more of steel plate cutting process in foreign countries generally uses more modern laser cutting, instead of punching, the surface quality of a thick steel plate is not high, and the second thick steel plate requires a larger tonnage punch. Three times the thick steel plate is too noisy, which is not conducive to environmental protection.

Flame cutting is the traditional cutting method that started because of its low capital, and the processing quality is not high. When the pleading is too high, a machining process can be processed, and the store has a large amount. It is now used primarily to cut thick steel plates that exceed 40 mm. Its disadvantage is that the thermal deformation is too large when cutting, the slit is too wide, the material is expensive, and the processing speed is too slow, which is only suitable for rough processing.

Plasma incision and fine plasma incision are similar to flame incision. The heat affected zone is too large, the precision is much larger than the flame cut, and the speed has an order of magnitude leap. It has become the main force in the middle plate processing. Huagong Farley's CNC fine plasma cutting start-up as the world's top plasma cutting device practice cut-off precision has reached the lower line of laser cutting, reaching more than 2 meters per minute when cutting 22mm carbon steel plate The speed and the cut end face are smooth and flat, and the best inclination can be controlled within 1.5 degrees. The disadvantage is that the thermal deformation is too large when the steel sheet is cut, and the inclination is also large. When the precision is high, the force is not enough. The product is more expensive.

High-pressure water incision is the use of high-speed water jet doped diamond to carry out the cutting of sheet metal. It has almost no restrictions on the raw material, and the thickness of the cut can be almost 100mm or more. It is simple for hot cutting of ceramics, glass, etc. The cracked raw material can also be cut, and the copper, aluminum and the like can be cut for the laser high-reflection material water jet, but the laser cutting has a big obstacle. The disadvantage is that the processing speed is too slow, too dirty, not environmentally friendly, and the consumables are also high.

Laser cutting is a process resistance of sheet metal processing, and it is the “machining center” in Shanghai sheet metal processing;

The laser cutting has a high level of flexibility, high cutting speed, high consumption power, and short product consumption cycle, which has won customers a shopping mall. Laser cutting without cutting force, no distortion in processing; no tool wear, good material compliance; whether it is simple or messy parts, laser can be used for fine and rapid shape cutting; its slit is narrow, cutting quality is good, and it is active. The level is high, the operation is cumbersome, the labor intensity is low, and there is no pollution; the active layout and nesting can be completed, the material utilization rate is advanced, the consumption cost is low, and the economic benefit is good. The useful life of this skill is long. Most of the plates that exceed 2 mm thickness abroad are laser-cut. Many foreign experts disagree that the next 30-40 years is the golden age of laser processing skills (the direction of sheet metal processing) ).

In general, it is recommended to use a carbon steel plate within 20mm, a stainless steel plate within 10mm, and a non-metallic material such as acrylic or wood. It is recommended to use laser cutting. The steel plate within 20-50mm is recommended to use plasma cutting, and the thicker steel plate is used for flame. Cut open. In the processing of copper, aluminum and other laser high-reflective materials and glass, marble and other fragile non-metallic materials, the use of waterjet cutting, within 1mm of the chassis cabinet manufacturers in large quantities, the relatively single varieties of sheet metal processing professional use CNC Punch, and then assist other cut wrists to carry out the cutting process.

First of all, the traditional laser cutting and starting as the main stream uses CO2 laser, which can stably cut carbon steel within 20mm, stainless steel within 10mm, and aluminum alloy below 8mm. Secondly, the advantage of fiber laser in cutting thin plates within 4mm Significantly, it is of poor quality when cutting thick plates due to the wavelength of the solid laser. Laser cutting is not all-powerful. The wavelength of CO2 laser is 10.6um. The wavelength of solid-state laser such as YAG or fiber laser is 1.06um. The former is simpler to be absorbed by non-metal, which can cut wood, acrylic, PP, and high quality. Non-metallic materials such as plexiglass, the latter is not easily absorbed by non-metals, so non-metallic materials cannot be cut, but the two lasers are incapable of encountering high-reflection materials such as copper, silver, and pure aluminum.

With the high-speed development of laser technology and the improvement of the consumption process from time to time, laser cutting as a fine cutting equipment is quietly replacing the traditional punching and shearing equipment, facing dizzy, cumbersome laser-cut models, and some merchants messing around. The boasting of the laser, the laser cutting machine is a foggy buyer. Wuhan Honglei Laser put forward the following opinions on modern laser cutting and boot selection:

Shanghai sheet metal processing

From the current use of laser laser cutting and the user's demand for skills, the future direction of laser cutting is undoubtedly high power, large format, high power, one-shot molding, and high intelligence. The wide-format series has brought high-efficiency and high-quality consumption power to the users in the occupation of locomotive occupations and heavy-duty occupations; the high-speed and high-precision series of cutting and starting in the construction machinery, high value-added production and occupations are used throughout; as a foreign processing profession, The super cost-effective cantilever laser cutting is the best choice.

In addition, the flexible processing system of fiber lasers with robots has a long history in the car occupation and supporting industries. In the past, it was monopolized by foreign integrators. In recent years, due to the financial crisis and the consumption skills of the car industry, many foreign countries have improved from time to time. The high-end brand and national brand of the car tasted the crab. The arrogance and mystery of the foreign high price was uncovered and torn. In recent years, the car body welding of the car, the laser of the car dashboard, and the car safety were provided. Airbag laser welding, car bumper, door, center column and other robot flexible cutting start, car bumper laser welding, car exhaust pipe online welding system, car shifting sleeve laser active cutting device, etc., 24 hours at the user site Stable and efficient consumption can be seen that domestic enterprises have a certain strength.

There are many factors to be considered in the selection of laser cutting machine. In addition to thinking about the maximum size of the workpiece, the maximum thickness of the material to be cut, and the size of the raw material, more needs are considered in the future. The largest workpiece size to be processed after the product's skill is modified, and the material provided by the steel business site is the most material for the product, the loading and unloading time, and so on. Laser cutting is a modern equipment with high input and high output. Saving one minute at a time may mean earning more than ten yuan. The current situation of laser cutting and laser cutting is also the main point that laser cutting buyers must pay attention to. The fierce shopping mall competition must avoid homogenization competition.

Railway locomotives, heavy industry, engineering machinery and other occupations, the parts required for processing are not too messy. In order to strengthen the processing ability and power, it is recommended to use a wide-format series, the width is generally 3-4.5 meters wide and the length is 6-30 meters. It can finish the one-time processing of medium and heavy plates, saving time and materials. When the thickness exceeds 20mm, the width and fine plasma (thickness over 45mm plus flame cut) are the best choice. It is suitable for processing 3-50mm or thicker steel plate. Open and stop together, the thin and thick plates are cut together to greatly advance the processing power. For some small workpieces, the high-speed and high-precision series is the best choice.