High-Strength Steel Used In Stamping Dies And Taping

Today’s high-strength steel and ultra-high-strength steel have achieved the lightweight of vehicles and improved the collision strength and safety performance of vehicles. Therefore, they have become an important development direction of automotive steel. However, as the strength of the sheet metal increases, the traditional cold stamping process is prone to cracking during the forming process, which cannot meet the processing requirements of high-strength steel plates. Under the condition that the forming conditions cannot be met, the hot stamping forming technology of ultra-high-strength steel plates has been gradually studied internationally. This technology is a new process that integrates forming, heat transfer and structural phase transformation. It mainly uses the characteristics of increased plasticity of sheet metal and decreased yield strength under high-temperature austenite state, and the process of forming through molds. However, thermoforming requires in-depth research on process conditions, metal phase transition, and CAE analysis technology. This technology is monopolized by foreign manufacturers and has slow domestic development.

In the past, in the production of deep-drawn or re-punched workpieces, everyone believed that EP lubricants were the best choice for mold protection. Sulfur and chlorine EP additives have been mixed into pure oil to increase the life of the mold has a long history. However, with the emergence of a new metal—high-strength steel and strict environmental protection requirements, the value of EP oil-based lubricants has decreased, and even lost the market.

In the molding of high-strength steel at high temperatures, EP oil-based lubricants lose their properties and cannot provide a physical mold protection diaphragm in extreme temperature applications. The extreme temperature type IRMCO high solid polymer lubricant can provide the necessary protection. As the metal deforms in the stamping die and the temperature continues to rise, EP oil-based lubricants will become thinner, and in some cases will reach the flash point or burn (smoke). IRMCO polymer lubricants generally have a much lower consistency when they are sprayed on. As the temperature rises during the forming process, it becomes thicker and tougher. In fact, high-molecular polymer extreme temperature lubricants are “heat-seeking” and will stick to the metal, forming a diaphragm that can reduce friction. This protective barrier can allow the workpiece to extend without cracking and bonding when the most demanding workpiece is formed, thereby controlling friction and metal flow. It effectively protects the mold, prolongs the service life of the mold, and improves the strength of stamping.

In-Mold Tapping

In-mold tapping, also known as in-mold tapping, is a new technology that replaces traditional manual tapping. Traditional tapping equipment can no longer meet the needs of stamping products, with low efficiency and long processing time. Far from meeting the needs of the market. The introduction of in-mold tapping technology makes the stamping die truly automated and efficient. The tapping range can reach the minimum M0.6, the maximum can reach M45, and the accuracy can reach 0.01mm. The in-mold tapping technology makes the punch out. The product does not need a second manual tapping. The quality of the extruded product is guaranteed, the surface finish is good, the efficiency is high, and the cost is low. It is widely used in stamping