The metal stamping parts are made by the stamping process. The stamping process is a method of applying force to the workpiece sheet blank through the die to deform or separate it, thereby obtaining a workpiece of a certain size, shape and performance. The stamping and drawing process should be combined with the actual situation, and a reliable process plan should be selected. The following is a brief introduction to how metal stamping parts are manufactured:

Process characteristics of metal stamping parts

1. The stamping method can obtain workpieces with complex shapes, and the dimensional accuracy of cold stamping parts is guaranteed by the mold, so the size is stable.
2. The material utilization rate is high, the workpiece is light in weight and high in strength, and the stamping process consumes less energy, so the process investment is low.
3. Simple operation, low labor intensity, easy to realize mechanization and automation.
4. The structure of the die used for stamping is generally complex, and the manufacturing cycle is long.

Process division of metal stamping parts

A die is a tool that separates or deforms the sheet metal, and it consists of an upper die and a lower die. According to the structure of the die, the process can be basically divided into three types: simple stamping, continuous stamping and compound stamping.

1. Simple stamping is a stamping process in which only one process is completed in one stroke of the punch. That is a simple die for blanking or punching.
2. Continuous stamping means that in one stroke of the punching machine, several stamping processes are simultaneously completed on different parts of the mold, and the feeding distance of each time is controlled by the stopper pin.
3. Compound stamping is to complete several stamping processes on the same part of the mold in one stroke. The biggest feature of composite stamping is that there is a convex and concave die in the mold, and the composite die is suitable for stamping parts with large batches and high precision.

Material selection of metal stamping parts

Common metal stamping sheets are low titanium alloys, magnesium alloys, carbon steel stainless steel, aluminum, copper, and their alloys. They have high plasticity and low deformation resistance and are suitable for metal stamping processes.

1. Copper, aluminum and their alloys are widely used as components of electrical equipment because of their good ductility and excellent electrical conductivity.
2. The stamping process of carbon steel and stainless steel is often used to manufacture equipment shells, structural parts, boxes, etc., but due to their strong rigidity, stamping oil is usually used to improve the process.
3. Titanium alloy stamping is mainly used in large equipment, aircraft, ships, satellites and other scenarios that require low weight and high strength. The process is difficult, so special stamping oil must be used to improve the process level when stamping.

Selection method of metal stamping oil

Stamping oil plays a key role in the stamping process. Good cooling performance and extreme pressure and anti-wear performance have made a qualitative leap in the service life of the mold and the improvement of workpiece accuracy. Depending on the material of the workpiece, the emphasis on the performance of stamping oil is also different.

1. Silicon steel plate is a material that is relatively easy to punch. Generally, for the ease of cleaning of the finished workpiece, a low-viscosity punching oil is selected on the premise of preventing punching burrs.
2. When selecting stamping oil for carbon steel plate, the best viscosity is determined according to the difficulty of the process, the oil supply method and the degreasing condition.
3. Galvanized steel sheet will react chemically with chlorine-based additives, so when selecting stamping oil for galvanized steel sheet, attention should be paid to the possibility of white rust in chlorine-type stamping oil, and the use of sulfur-type stamping oil can avoid the rust problem. But it should be degreased as soon as possible after stamping.
4. Stainless steel plate is a material that is prone to hardening, and requires the use of stretching oil with high oil film strength and good sintering resistance. Generally, stamping oil containing sulfur-chlorine compound additives is used to ensure extreme pressure performance while avoiding problems such as burrs and cracks in the workpiece.

Conclusion

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