Sheet metal fabrication is a vital process that involves creating various components and structures made from metal sheets. This project involved the fabrication of 105,000 metal parts for the bodywork of metro cars. The parts were made of stainless steel with thicknesses ranging from 0.8mm to 4.5mm, and up to 7 specifications. The fabrication process involved coil grinding, straightening, laser cutting, edge milling, rolling, bending, punching, and welding. The longest stainless steel plate that was straightened was 13m. All steel parts were custom-made according to the drawings provided by the customer.
The fabrication process for the metro car bodywork involves several steps, including coil grinding, straightening, laser cutting, edge milling, rolling, bending, punching, and welding. Each of these steps is critical to ensuring that the final product meets the customer's specifications.
The first step in the process is coil grinding, where the raw stainless steel material is ground to a uniform thickness. The material is then straightened to ensure that it is flat and free of any warping or twisting. This is a critical step as it ensures that the material is ready for the next steps in the process.
Once the material is straightened, it is laser-cut to the required shape and size. The laser cutting process is highly accurate and allows complex shapes to be cut quickly and precisely. The parts are then subjected to edge milling, rolling, bending, and punching to create the final shape.
Welding is also a critical step in the process as it ensures that the different parts of the bodywork are securely attached to each other. The welding process used in this project is MIG (Metal Inert Gas) welding, which is a highly effective welding method for stainless steel.
Finally, Quality control is critical in the fabrication of sheet metal parts, and this project is no exception. The final product must meet strict standards of accuracy and quality to ensure that it is safe and functional for use in metro cars.
To ensure quality control, the project team uses advanced inspection tools and techniques, such as NDT(include ultrasonic testing, X-ray inspection, and dye penetrant inspection, etc) to verify that each part meets the customer's specifications. The team also performs visual inspections to ensure that there are no defects or imperfections in the parts.
This project was a success. We were able to fabricate 105,000 metal parts for the bodywork of metro cars, on time and within budget. The customer was very happy with the quality of the parts and they placed a repeat order with us.
The sheet metal fabrication for the bodywork of metro cars had several benefits, including the production of high-quality parts that met the customer's specifications. The use of CAD software a nd precision machines ensured that the fabrication process was efficient and accurate, reducing the likelihood of errors and reducing the time required to fabricate each part. The use of stainless steel also ensured that the final product was durable, rust-resistant, and could withstand the harsh conditions of the metro environment.
Sheet metal fabrication for the bodywork of metro cars is a complex and challenging process that requires expertise and experience in sheet metal fabrication. The fabrication process involves several stages, including coil grinding, straightening, laser cutting, edge milling, rolling, bending, punching, welding, etc. The precision required in each stage of the fabrication process is crucial to ensure that the final product meets the customer's specifications and is safe and functional. The use of CAD software and precision machines can help achieve this precision, resulting in high-quality parts that meet all safety standards.
For more information about the project case or to request a free quotation, feel free to contact us at yuki.zhou@openex.com.cn.