Stamping technology and mould design
Stamping is a kind of precision machining process whose main purpose is to process parts with complex shape and high precision. Over the years, stamping technology has developed rapidly, and it has now become an integral part of the modern manufacturing industry. The stamping product has gradually entered peoples daily life and the production of auto parts, furniture, construction accessories and other industries.
In general, moulds are divided into three categories: dies, punches and mandrels. Dies are generally used for pressing outer shapes, punches for making inner shapes, and mandrels for bending and forming processes. The design principles of pressing molds aim to reduce the number of components, simplify production processes, reduce production costs, and maintain high precision. At the same time, the design of molds also requires pay attention to the choice of materials, lubrication factors and mode of operation of the process.
Material selection is the core factor of mold design. Generally speaking, die steel is widely used for molds with higher precision requirements. On the one hand, high-quality die steel ahs high strength, good wear resistance and high hardness. In addition, molds with long life cycle require special surface treatment process such as chromium plating and shot peening on die steel. Moreover, due to its comprehensiveness, the mold structure needs to be designed reasonably to obtain the best combination of strength and durability.
The design of stamping molds also requires the selection of reasonable lubrication. Generally, the requirements of lubrication for stamping process include two aspects: lubricant and anti-rust. Improper lubrication can cause adhesion between molds and materials, resulting in surface scratches and noisy operations. In order to solve this problem, specialty lubricants should be applied to the process. For example, a mixture of sulfur, paraffin wax and molybdenum disulfide can be used to lubricate the punch and die surfaces.
In addition, it is very important to choose the right method of operation in the process design. For example, in the multi-stage progressive process, the feed step is similar to the setting process. It controls the length of the processed part and the total amount of material that enters the die. If a progressive process is used, the part must carefully control the position of the material along with its deformation degree.
In conclusion, stamping is a kind of precision machining process that requires a lot of attention in terms of material selection, lubrication, and operation method design. Selecting the right material, lubricant, and injection method is the key to ensuring that all processes are carried out smoothly. With the increasing demand for high-precision components, the role of stamping technology in the manufacturing industry will further increase and its application will become more and more extensive.
