What are the characteristics of multi-station progressive molds

The station progressive die is mainly used for the mass production of small and complex stamping parts. It has a large number of stations, high precision, long service life, many small die parts and inserts, high hole position precision and large size coordination for plate parts. Therefore, compared with the conventional die, the multi-station progressive die has similar processing and assembly methods, but the requirements are higher, and there are more places to coordinate, so the processing and assembly are more complicated and difficult. Under the premise of reasonable mold design, to manufacture qualified multi-station progressive molds, advanced mold processing equipment and measurement methods and reasonable mold manufacturing process specifications must be available. Compared with other punching dies, multi-station progressive die processing has the following characteristics: 　　 (1) working parts, inserts and three major plates (punch fixed plate, concave die fixed plate and discharge insert fixed plate, referred to as three plates ) Is the processing difficulty and key control parts of multi-station progressive die. The processing difficulties are embodied in the profile size and accuracy of the working parts, and the hole size and position accuracy of the three major plates. (2) Because of the complex shape, small size and high precision of small punch and concave mold inserts, it is difficult to complete the processing by traditional machining, and must be supplemented by advanced processing methods such as high-precision CNC wire cutting, forming grinding, and curve grinding Can only be completed (usually using CNC wire cutting + forming grinding). Since the small punches and female mold inserts are vulnerable parts, they need to be replaced and must have a certain interchangeability. Therefore, the production of small punches and female mold inserts cannot be matched and processed, but they are interchangeable and separated. For processing, whether it is a punch or a die in the drawings, the specific dimensions and tolerances of the guaranteed gap must be marked in the drawings to facilitate the production of spare parts. (3) The punch fixing plate, the concave mold fixing plate and the discharge insert fixing plate in the multi-station progressive die have high hole position accuracy and large size coordination. They are the three with the most difficult manufacturing, the most man-hours, and the longest cycle. The key part is the concentrated expression of the precision of the mold. The position accuracy and verticality of the punches or inserts installed on it are guaranteed by these three plates. Therefore, the three plates must be selected correctly, the processing method and heat treatment method must be determined to ensure the processing quality. In addition to traditional mechanical processing methods, three-plate processing must also use advanced processing methods such as high-precision CNC wire cutting, coordinate boring, and coordinate grinding, and combined processing when necessary. (4) Multi-station progressive die requires high accuracy, long life, and high dimensional stability. Therefore, the selection of mold parts requires high wear resistance, high strength and high hardness, as well as small heat treatment deformation and stable dimensions. Good sex.　　According to the processing requirements of the multi-station progressive die, the finishing equipment of the multi-station progressive die is mainly high-precision equipment such as slow-moving wire cutting machine tools, precision CNC grinders, coordinate grinders, and optical curve grinders. In particular, the slow-moving wire-cutting machine has to undertake semi-finishing and finishing work, and the slot and position of some parts are also processed by cutting instead of grinding and cutting and grinding to ensure the accuracy of size and step distance.