Stamping molds are a type of mold product we use in production and manufacturing, and some people may not be very familiar with them. Stamping die is a special process equipment used in cold stamping processing to process materials (metal or non-metal) into parts (or semi-finished products), known as cold stamping die (commonly known as cold stamping die). Stamping is a pressure processing method that uses a mold installed on a press to apply pressure to a material at room temperature, causing separation or plastic deformation, in order to obtain the required parts.
Different smelting processes
The smelting process of large factory materials includes electric furnace smelting, external refining, and vacuum degassing. This process accurately controls the chemical composition of steel, with low gas content and high purity. Small factory materials are generally made by fusing scrap steel and furnace materials in a medium frequency furnace, and directly pouring flat steel ingots. This process has a large chemical composition deviation, more impurities in the steel, and a high gas content, which leads to more shrinkage and internal cracks in the finished product, seriously affecting the processing and use performance of the steel
Different rolling processes for finished products
Large factory steel ingots are forged and then rolled into products, and during the rolling process, they are continuously rolled with multiple deformations by multiple rolling mills. Small factory materials are made by directly rolling steel ingots back and forth using a single rolling mill. The deformation of the steel ingots is small, the rolling ratio is small, the internal microstructure is uneven, and the non-metallic inclusion particles are large. Directly manifested as the inability of the material to be sawn or drilled locally.
Different appearance quality
Due to the continuous rolling of large factory materials and the high number of deformations, the accuracy of their appearance dimensions is relatively high, with both sides approximately at right angles. Due to the fact that the production process of small factory materials is entirely controlled by manual labor, there is a large deviation in appearance dimensions, a large tolerance in thickness and width, a large rounded corner of flat steel, and a deviation from rectangular cross-section.
Different heat treatment methods for finished products
After the production of large factory materials, complete spheroidization annealing process is adopted to ensure that the carbide level in the steel is not greater than level 4, and to ensure the uniformity of hardness. The small factory material adopts the general softening annealing process, and even natural cooling, which cannot ensure the uniformity of carbide level and hardness in the steel.
Different usage effects
Due to differences in production processes, they directly affect the effectiveness of material usage. Firstly, the size deviation and flatness of small factory materials are relatively large, resulting in the need to leave sufficient machining allowance during processing, otherwise they cannot be processed. Secondly, due to the uneven hardness of small factory materials, it is difficult to process and drill holes, resulting in low processing efficiency. After processing, the workpiece is prone to deformation, and even mold scrap may occur.