Importance

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Abstract

A punching tool for a press, includes a punch guide having a stripper plate at a lower end thereof. A punch body is formed with a blade portion at a lower end thereof and disposed within the punch guide for up and down movement. A punch driver includes a piston rod fixed to the punch body. A gas spring section has a gas cylinder, the piston rod of the punch driver extending through the gas cylinder for up and down movement. A high pressure gas is contained in the gas cylinder to bias the punch driver upward, and an annular elastic member is interposed between an upper surface of the punch guide and a lower surface of the gas cylinder of the gas spring section to absorb shock generated when the stripper plate attached to the punch guide collides against work during a punching process. The punching tool can reduce noise generated during punching processing and further can prevent a punching mark (scar) from being formed on the surface of the punched work.

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First Claim