In order to meet the needs of export and domestic upgrading, the production of small batches and multiple varieties of vehicles has become normal in the automobile manufacturing industry. The processing technology of the original general automobile body parts can no longer fully meet today's product quality and production needs. Among them, the laser cutting machine has the characteristics of processing high-precision, porous and complex shaped parts, which has an irreplaceable role.
Now freight car manufacturers have been equipped with CNC fine plasma cutting machines, laser cutting machines, etc., which are used for processing sheet metal parts with complex shapes and high precision requirements in automobiles.
Main advantages of laser cutting technology in automobile manufacturing Laser cutting machine has been widely used in automobile manufacturing industry and plays an irreplaceable role in other CNC cutting equipment. Its main advantages are as follows:
1. Suitable for accessories made of various materials
Automotive materials include low carbon low alloy steel, high-strength steel, atmospheric corrosion resistant steel, ferritic stainless steel, austenitic stainless steel and aluminum alloy. Laser cutting equipment can be used to process, and its processing range can cover almost all materials in the automobile.
2. High processing precision
Laser cutting equipment has higher processing precision than other cutting equipment and can meet the processing requirements of high-precision accessories.
3. The slit width is narrow
Small slitting is conducive to reducing the spacing of accessories, improving the utilization rate of materials, and producing less cutting slag during cutting.
4. High material utilization rate
When cutting accessories, different accessories with the same thickness and material can be cut by nesting, making full use of the leftovers of raw materials.
5. Low cutting roughness
When laser cutting equipment is used to cut accessories made of the same material, the cutting roughness value is lower than that of other equipment. In the automobile manufacturing industry, the section roughness of workpieces processed by different CNC cutting equipment is obviously different, and the section roughness value of laser cutting is low.
6. Small heat affected zone
In the process of laser cutting, the edge of the material to be cut will have a heat affected zone due to heating. However, compared with other processing methods, laser cutting has less energy concentrated heat input. Compared with fine plasma cutting and flame cutting, the heat affected zone is relatively small and the heat input is small. It is very important for ferritic stainless steels that are prone to grain growth when heated and high-strength steels that are prone to hardening, and it is conducive to improving the weld quality.
7. Low cost of laser cutting in small batch production
In mass production, the die blanking process is selected for processing and mass production. The cost of making the die is shared equally among each accessory, so the production cost is low. However, if it is a small batch production and the processing technology of die blanking is adopted, not only the production cycle of the die is long, which cannot meet the timeliness of parts processing, but also the cost of die production is shared equally among each part, so the processing cost is relatively high.
Therefore, NC cutting is generally used for processing. When numerical control fine plasma cutting is adopted, due to the weak perforation capacity, low cutting accuracy and poor hole forming quality of plasma cutting, another drilling process needs to be added and drilling jigs need to be made. Not only the processing time is longer, but also the cost is higher. Laser cutting can ensure the one-time forming of accessories, which is conducive to improving the timeliness of accessories processing, and is suitable for small batch production. How to select the cutting process should be comprehensively considered according to the size, shape, cost and accuracy requirements of accessories. When the size of the accessories is small and the requirements for the shape and size of the holes and the positioning size are high, it is more economical to use laser cutting.
With the change of the automobile manufacturing industry and the global economic integration, the automobile manufacturing enterprises have changed from the original single, large batch production of national railway vehicles to small batch, multi variety export vehicles. This transformation has also brought revolutionary changes to the manufacturing of auto parts. The original sheet metal processing equipment, such as plate shears and punches, has been used less and less frequently, and has been replaced by CNC fine plasma cutting machines, CNC flame cutting machines, and laser cutting machines, which have the advantage of processing high-precision, small size, complex shape accessories, and being able to process a variety of materials, It plays an irreplaceable role.