Large three-plate type multistation progressive die

Abstract

The invention discloses a large three-plate type multistation progressive die which comprises an upper die and a lower die, wherein the upper die and the lower die are arranged correspondingly, the upper die comprises an upper die holder, a discharging plate, a pressing block, a punching terrace die assembly arranged on the lower end face of the upper die holder, a forming terrace die assembly, alimit sleeve assembly and a nitrogen spring; the upper die holder, the discharging plate and the pressing block are sequentially arranged; the nitrogen spring is arranged in the upper die holder; thelower die comprises a lower die holder, a lower cushion block, a lower support plate, a floating assembly, a punching concave die and a forming concave die; the lower die holder, the lower cushion block and the lower support plate are sequentially arranged, and the floating assembly is arranged in the lower die holder; the punching concave die and the forming concave die are fixed in a positioning cavity formed by finely milling at the lower die holder; and the punching concave die and the forming concave die are respectively arranged corresponding to the punching terrace die assembly and theforming terrace die assembly. The large three-plate type multistation progressive die can be used for massively producing high-strength and high-precision thick plate products; and the service life of the die is greatly prolonged.

Description

technical field [0001] The invention relates to a stamping progressive die, in particular to a three-plate large-scale multi-station progressive die, which belongs to the technical field of die manufacturing. Background technique [0002] At present, for the high-strength and large-thickness stamping parts used in the automobile, building materials, hardware machinery and other industries with a thickness of less than 6mm and a tensile strength of more than 500N / mm??, single-process molds are usually used to complete their production, but they are limited to Its process characteristics require many sets of molds to complete the manufacture of a complete part. At the same time, it needs to be equipped with a large number of personnel, stamping equipment, semi-finished turnover boxes, sites, etc. The manufacturing accuracy and production efficiency of the parts are low, and the size of the parts is unstable. The traditional extensive production mode, another way is to use ordi...

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Problems solved by technology

[0002] At present, for the high-strength and large-thickness stamping parts used in the automobile, building materials, hardware machinery and other industries with a thickness of less than 6mm and a tensile strength of more than 500N / mm??, single-process molds are usually used to complete their production, but they are limited to Its process characteristics require many sets of molds to complete the manufacture of a complete part. At the same time, it needs to be equipped with a large number of personnel, stamping equipment, semi-finished turnover boxes, sites, etc. The manufacturing accuracy and production efficiency of the parts are low, and the size of the parts is unstable. The traditional extensive production mode, another way is to use ordinary eight-plate progressive die, according to the characteristics of its die structure, for punching high-strength, high-precision thick plate products, the strength of the die is weak, in the mass production process In the middle, under the action of alternating load, the template will be broken, twisted, etc., the precision and life of the mold will be greatly reduced, and it will not be possible to complete large-scale and long-term production, and it will also be subject to many side forming effects during the product forming process. Under the influence of force, the mold will have punches, guide post breakage, etc., and even serious consequences such as safety accidents.

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