Patent ID: 9506513
Filing Date: 2016-11-29
CPC Classification: B21J,B23D,F16D,Y10T

Claim Text:
1. A steel back two-way synchronous broaching device, comprising an upper die base, an upper die board and a lower die base, wherein the broaching device further comprises a molded upper die and a working positioning lower die, the molded upper die comprising a blade sliding board, a left blade, a right blade, a left inner slider, a right inner slider, a left outer slider, and a right outer slider, and the working positioning lower die comprising a concave die, a product floating block and a floating spring, wherein the upper die base is connected with an oil hydraulic machine, the upper die board is mounted at the lower part of the upper die base, the lower die base is connected with the oil hydraulic machine and the lower die board is mounted on the upper part of the lower die base in parallel, wherein the molded upper die is mounted on the upper die board; wherein the left and the right inner sliders are mounted at the lower part of the blade sliding board, symmetrically, horizontally and slidably; wherein the left and the right blades are respectively fixed and mounted at the lower surfaces of the left and the right inner sliders and have surfaces provided with a plurality of broaching teeth; wherein a spring is mounted between the left and the right inner sliders horizontally; wherein the left and the right outer sliders are respectively slidably mounted at the outer sides of the left and the right inner sliders; wherein the working positioning lower die is mounted on the lower die board; wherein a working positioning type cavity is formed between the concave die and the product floating block; wherein a pushing rod is provided at the lower part of the lower die base fixed and mounted with a left and right supporting blocks corresponding to the left and right outer sliders; and wherein the left and the right supporting blocks are passed through and mounted on the lower die board lengthwise.