In the field of mold manufacturing, the selection of materials is regarded as the cornerstone of improving auto mold strength. Especially in the application of automotive molds, working parts usually use high-strength and high-wear-resistant tool steel. Such materials show excellent shape retention ability when subjected to large loads and have excellent fatigue resistance and wear resistance. For example, the elastic modulus of carbon steel and alloy steel is about 206GPa, which ensures that the mold maintains stable shape during long-term use. In addition, with the popularization of high-strength sheet hot stamping forming technology, the selection of mold materials also needs to consider high temperature resistance and thermal fatigue resistance to meet the requirements of modern manufacturing processes.

In the mold design stage, reasonable structural design is also crucial to improving mold strength. Designers need to fully consider the various forces that the mold may encounter during the working process, including tension, compression and bending, and reduce stress concentration through structural optimization. For example, in the stamping die of automotive cover parts, the reasonable arrangement of support structures can significantly improve the load-bearing capacity and deformation resistance of the mold. At the same time, for key components in the mold, such as the die and the punch, the design should consider using thicker materials or introducing rib design to enhance its structural strength and ensure the stability and reliability of the mold under high load conditions.

Optimizing the manufacturing process is also an important means to improve the strength of the mold. During the mold manufacturing process, the processing accuracy and surface quality must be strictly controlled. Since the mold working part surface often presents a complex three-dimensional surface combination, the processing process is both cumbersome and challenging. Therefore, the use of advanced processing technology and equipment, such as multi-axis CNC milling machines and gantry milling machines, can significantly improve processing accuracy and efficiency. In addition, by optimizing heat treatment processes, such as quenching and tempering, the microstructure of the mold material can be further improved, thereby improving its strength and hardness.