Application of progressive dies in the production of automotive stamping parts

2024-04-02 08:46:11

Automotive Dies With the development of high efficiency and automation in automotive stamping production, progressive dies will be more widely used in the production of automotive stamping parts. The progressive die is a high-tech mold product with high technical difficulty, high manufacturing precision requirements, and long production cycle. The multi-station progressive die will be one of the key mold products developed in my country. Stamping parts with complex shapes, especially some Small and medium-sized complex stamping parts that require sequential punching by multiple dies according to traditional processes are increasingly being formed using progressive dies.

The quality and performance of mold materials are important factors affecting mold quality, life and cost. In recent years, in addition to the continuous introduction of a variety of high toughness and high wear resistance cold work die steel, flame quenching cold work die steel, and powder metallurgy cold work die steel, it is worthwhile to use cast iron materials for large and medium-sized stamping dies abroad. Pay attention to the development trends. Ductile iron has good strength, toughness and wear resistance. Its welding performance, machinability and surface quenching performance are also good, and its cost is lower than alloy cast iron. Therefore, it is widely used in automotive stamping dies.

Advanced processing technology and equipment are an important basis for improving productivity and ensuring product quality. It is not uncommon for advanced automotive mold companies to find CNC machine tools equipped with dual workbenches, automatic tool changers (ATC), photoelectric control systems for automatic processing, and online workpiece measurement systems. CNC machining has developed from simple surface processing to comprehensive processing of profile and structural surfaces, from medium and low-speed processing to high-speed processing, and processing automation technology has developed very rapidly.

High-strength steel plate stamping technology for automotive molds is the future development direction

High-strength steel is increasingly used in automobiles due to its excellent properties in terms of yield ratio, strain hardening properties, strain distribution capability, and collision energy absorption. At present, the high-strength steels used in automotive stamping parts mainly include paint-hardened steel (BH steel), dual-phase steel (DP steel), phase transformation-induced plasticity steel (TRIP steel), etc. The International Ultra-Light Body Body Project (ULSAB) estimates that 97% of the materials in the advanced concept vehicle (ULSAB-AVC) launched in 2010 will be high-strength steel. The proportion of advanced high-strength steel plates in the entire vehicle will exceed 60%, and the dual-phase The proportion of steel will account for 74% of automotive steel plates.

The currently widely used mild steel series, mainly IF steel, will be replaced by high-strength steel plate series, and high-strength low-alloy steel will be replaced by dual-phase steel and ultra-high-strength steel plates. At present, the application of high-strength steel plates for domestic automobile parts is mostly limited to structural parts and beams, and the tensile strength of the materials used is mostly below 500MPa. Therefore, quickly mastering high-strength steel plate stamping technology is an important issue that needs to be solved urgently in my country's automotive mold industry.