Comparison of the development of precision progressive die at home and abroad

The level of precision progressive die technology is an important indicator to measure the level of product manufacturing in a country. The market for precision progressive dies is vast. Therefore, industrially developed countries continue to develop and upgrade in terms of mold technology and functions.　　(1) Progressive die of motor core. Take the representative large-scale one-mould 3-row iron core automatic lamination progressive die manufactured by the representative American companies such as Aoberg, Japan's Kuroda and Mitsui as an example. The manufacturing accuracy and step accuracy are both up to 2μm, and the mold life is up to 200 million. For more than strokes, the life of sharpening can reach more than 3 million strokes, and the stroke speed can reach more than 300 strokes/min. Mold manufacturing is 3-4 months in the same period. According to demand, the mold can be equipped with 'electronic monitoring technology device'.　　(2) Progressive die for air-conditioning fins. Take the representative large-scale one-mould 36-row fin progressive die manufactured by Japanese Hidaka, American OAK and Italian GBS as an example. The manufacturing precision is 2μm and the surface roughness is Ra.

0.10μm, mold life is more than 500 million strokes, one-time sharpening life is more than 10 million times, punching speed is more than 280 times/min, and mold manufacturing cycle is 3-4 months. Mold technology function, one mold can punch 72 rows of products.　　 (3) Lead frame progressive die. Take a typical progressive die with a frame, 3 rows and 48 legs manufactured by Yamada Corporation of Japan as an example. The manufacturing accuracy is 2μm, the surface roughness is Ra0.10μm, the die life is more than 100 million strokes, and the sharpening life is 300. More than 10,000 punches, the punching speed is more than 450 times/min, and the mold manufacturing cycle is 2 months. According to demand, multiple progressive dies and multiple high-speed punching machines are used to form an automatic production line to punch 208 leg products.　　(4) Progressive die of connecting device. Take the typical 60-station progressive die for connecting parts manufactured by Klansky in Germany as an example, with a manufacturing accuracy of 2μm, a die life of more than 200 million strokes, a sharpening life of more than 4 million strokes, and a punching speed. Up to 450 times/min, the mold manufacturing cycle is 2 months. Mold technology function, can punch two parts with different materials in one mold and encapsulate them into an integrated assembly.　　(5) Progressive die for electron gun parts. Take the representative progressive die for color tube electron gun parts manufactured by Japanese companies such as Toshiba and Hitachi as an example, with a manufacturing accuracy of 2μm, a die life of more than 100 million strokes, and a manufacturing cycle of 2-3 months. The mold technology function can realize products of the same material and different models in one mold.　　(6) Progressive die for shell parts. The casing parts progressive die manufactured by the representative American Oberg Company has a manufacturing accuracy of 2μm, a die life of more than 100 million strokes, and a manufacturing cycle of 3 months. The technical function of the mold, the product is drawn in both directions and 5 parts are punched out in one mold, which reflects the high level of the mold and the high efficiency of the product.　　The main gap between the domestic progressive mold and the international advanced level　　The gap is mainly manifested in the following aspects: 　　(1) Compared with the international advanced level, the precision of mold manufacturing is one level lower in the degree of refined mold manufacturing.　　(2) Compared with the international advanced level, the service life of the mold is more than 30% lower. In particular, the low life of one-time sharpening leads to an increase in the number of mold maintenance and reduces the efficiency of stamping production. In addition, the punching speed used by the mold on the high-speed punching machine is about 150 times/min lower.　　(3) Compared with the international advanced level in terms of mold reliability and stability, the adjustment and maintenance time during mold trial and mold use has increased by more than 30%. The gap in reliability and stability of domestic molds is lower than the international advanced level, which is a factor that directly affects the market competitiveness of domestic molds.　　(4) Compared with the international advanced level in the mold manufacturing cycle, the gap has been narrowing, and the manufacturing cycle of some mold categories has been synchronized with the international advanced level. However, in the case of a large number of orders and a concentrated manufacturing cycle, the mold cannot be delivered on schedule. From an overall point of view, the realization rate of large-scale mold production capacity and delivery time is more than 10% lower than the international advanced level.