Bending device of a spring forming machine

Abstract

A bending device used in a spring forming machine is disclosed to include a vertical rail at the machine frame, an upper slide and a lower slide respectively driven by a respective power source to move along the vertical rail relative each other, an oblique upper holder and an oblique lower holder respectively affixed to the upper slide and the lower slide, and an upper push member and a lower push member respectively driven by a respective power source to move along the oblique upper holder and the oblique lower holder for bending a metal strip into a coiled spring.

1 . A bending device used in a spring forming machine for bending a metal strip into a coiled spring, comprising a rail vertically mounted on a machine frame, a lower slide mounted on said rail and vertically slidable along said rail, an upper slide mounted on said rail above the elevation of said lower slide and vertically slidable along said rail, an oblique lower holder fixedly mounted on said lower slide in an oblique position, an oblique upper holder fixedly mounted on said upper slide in an oblique position revered to said lower holder, a lower push member coupled to said oblique lower holder for bending a metal strip into a coiled spring, an upper push member coupled to said oblique upper holder for bending a metal strip into a coiled spring, and plurality of power sources controllable to move said lower slide and said upper slide respectively in vertical direction along said rail and to move said lower push member relative to said oblique lower holder and said upper push member relative to said oblique upper holder respectively. 
   
   
       2 . The bending device as claimed in  claim 1 , wherein power sources are servomotors controlled by a control box of the spring forming machine. 
   
   
       3 . The bending device as claimed in  claim 2 , wherein said rail is mounted on a right side of the machine frame