1, the number of working procedures of precision stamping parts mainly depends on the complexity of its structure and shape, and depends on the number of bending angles, relative positions and bending directions. When the bending radius of the bending part is less than the allowable value, the shaping process is added after bending.
2. The number of processes of precision stamping parts is related to material properties, drawing height, drawing steps, drawing diameter, material thickness and other conditions, and can only be determined by drawing process calculation. When the fillet radius of the drawing part is small or the dimensional accuracy is high, it is necessary to add a shaping process after drawing.
3, the determination of the number of processes should also be consistent with the existing forming capacity of enterprises and the status of stamping equipment. Mould-making ability should meet the requirements of improving mould processing and assembly accuracy. Otherwise, it can only increase the number of operations.
4. When the section quality and dimensional accuracy of precision stamping parts are required, we can consider adding trimming process after blanking process or directly adopting precision blanking process.
5. In order to improve the stability of precision stamping process, it is sometimes necessary to increase the number of processes to ensure the quality of precision stamping parts. For example, the additional positioning process hole punching of bending parts, the additional deformation release hole punching in the forming process to transfer the deformation area and so on.
6. The stamping of precision stamping parts with simple shape is completed by single-process die. Due to the limited structure or strength of the die, the inner and outer contours of the workpiece with complex blanking shape should be divided into several parts, and multiple stamping processes should be adopted.
7. Special stamping oil should be selected for precision stamping. Non-special oils such as rapeseed oil, machine oil and recycled oil do not contain additives suitable for stamping, which will cause quality problems such as decreased workpiece accuracy, burr and surface potholes. Moreover, the chemicals in non-special oil products will cause the machine to rust and yellow robe, and the workers' skin will be allergic.
Today, I will introduce the matters needing attention in the processing technology of precision stamping parts. There are many processing steps of precision stamping parts, so the staff should know the precautions of each step in detail and operate correctly to avoid mistakes and affect the forming quality of products.