Patent ID: 9132462
Filing Date: 2015-09-15
Classification: B21D

Abstract:
1. A bending press system, comprising: a base; a slider disposed above the base and moving downwardly toward the base or moving upwardly from the base; a curvature die mounted at the base and the slider, and integrated by descent of the slider such that a pipe member inserted in the curvature die is formed to have a predetermined curvature; and a pair of clamping units disposed to be rotatable by a predetermined angle corresponding to the curvature die at both sides of the base, and to clamp both end portions of the pipe member, wherein each clamping unit comprises: a clamping die fixed on the base and including a space formed therein; a clamping block positioned in the space of the clamping die, mounted at the clamping die to be rotatable by the predetermined angle through a rotation shaft, and including a receiving end, formed to face the curvature die, and a supporting end formed at a lower portion thereof; a clamping cylinder mounted at an upper portion of the clamping block to face the receiving end and including an operating rod moving forward or rearward by hydraulic pressure; a clamper mounted at a front end of the operating rod, to clamp an end portion of the pipe member inserted between the clamper and the receiving end by pressing the end portion of the pipe member together with the receiving end; and a return spring mounted corresponding to a surface of the supporting end in the space of the clamping die, and applying restoring force to the supporting end so as for the clamping block to rotate to an original position of the clamping block, wherein the return spring comprises a rod and a roller mounted at a front end of the rod, and slidably contacts with the surface of the supporting end through the roller.