The selection of mold materials must adhere to the principle of ensuring low prices under the premise of use

The selection of mold materials must adhere to the principle of ensuring low prices under the premise of use. In terms of material selection, it is not that the higher the grade, the better. The high grade of materials generally means that the higher the price, the higher the development cost of molds and new products, and it is also related to how to reasonably determine the stamping production program. The service life requirement directly affects the structural design and material selection of the mold. Our company generally requires the service life of the mold to be 500,000 strokes, but under the current market sales situation of multi-variety, small and medium-sized batch production, whether the mold service life continues to be reasonable according to the requirement of 500,000 strokes is worth reconsidering, reducing it to 400,000 Even 300,000 strokes are under consideration. Toyota’s drawing die material mainly uses ductile iron (KSCD-800IS) instead of the alloy cast iron currently popular in our country (currently our company’s outer cover drawing die material is GM246). Toyota is from the aspect of die material cost control The reason for considering the appropriate choice is that ductile iron has good welding performance and machinability, wear resistance and surface quenching hardness are ideal, but the cost is much lower than that of alloy cast iron. Taking into account the high cost of cast steel, Toyota has now used a large number of cast iron materials integrated with the base and the cutting edge as the trimming mold, which greatly reduces the machining cost of the mold. The integral cutting edge of cast iron can be directly used for trimming dies with a life span of hundreds of thousands of times only by surface flame quenching. In our company's automotive mold development, because of concerns about problems, we always emphasize the selection of the best possible materials and continuously strengthen the mold structure. Therefore, we have to master a degree. If we emphasize too much on 'sturdinessFor example, in a bidding for molds for new models, we required cast steel ICD5 (air-cooled steel) for scrap cutters and shaping flange inserts, because cast steel has better toughness than cast iron, it is not easy to smash the edge when used, and it is easy to weld and repair. In terms of cost control, we can use ductile iron KSCD-800IS, because KSCD-800IS is much cheaper than ICD5. It should be emphasized that when using KSCD-800IS for scrap cutters and shaping flange inserts, thin plates with a thickness of less than 0.8mm are mainly used. Previous post: The impact of stamping process selection on automobile manufacturing costs