What are the bending processes of CNC bending machines in special sheet metal products?

How does the CNC bending machine bend under special steel?

CNC bending machine

The special steel plate is extremely hard and tough. By optimizing the alloy composition, combined with the unique direct quenching process, high hardness and high toughness are obtained. The elongation is only about 7%, and the hardness generally reaches 550HBW. The structure and hardness of ordinary bending molds , Bending parameters can not meet its processing requirements, large springback, easy to crack, and the outer surface is easy to produce indentation. General processing and manufacturing enterprises use V-shaped and U-shaped bending molds. The R corner of the lower mold is a fixed structure. The width of the V port is generally 4 to 6 times the thickness of the material. The R corner of the upper mold is usually 1 to 1.5 times the thickness of the material. ,

For special sheet metal products, the R angle of the lower mold adopts a removable and rollable LD material roller structure, and the R angle, V port width and angle of the upper mold and the lower mold are redesigned. Special sheet metal must be taken into consideration here. For example, the R angle of the upper mold can be 3-6 times the material thickness, the R angle of the lower mold can be 4-8 times the material thickness, and the V-port width can be 6-12 times the material thickness. It plays a very good role in controlling bending rebound, cracking, and indentation on the outer surface. Wuxi Shenchong In addition, the following problems need to be paid attention to when bending: (1) Be careful to bend at right angles to the rolling direction, polish to remove all defects before bending, and the cutting edge should also be polished flat. (2) The bending force and springback will increase with the increase of the strength of the special sheet metal. The higher the hardness of the sheet, the greater the bending force and the greater the springback.

Based on cost and maintenance considerations, the upper mold R angle, the lower mold R angle, and the upper and lower mold bodies can all adopt a removable structure, which is convenient for maintenance and can reduce costs. The use of special sheet metal bending technology has the advantages of flexible production, which is convenient for product upgrade and adjustment, and can effectively meet the accuracy requirements of welding. The initial investment is small, the investment cycle is short, and the requirements for equipment personnel are relatively low, which is conducive to reducing enterprise costs.