Search International and National Patent Collections

1. (WO2017154792) PRESS BRAKE CROWNING METHOD USING FORCE-INCREASING MECHANISM, AND PRESS BRAKE

Pub. No.:    WO/2017/154792    International Application No.:    PCT/JP2017/008581
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Mar 04 00:59:59 CET 2017
IPC: B21D 5/02
B30B 15/24
Applicants: AMADA HOLDINGS CO.,LTD.
株式会社アマダホールディングス
Inventors: SUZUKI Taishi
鈴木 大志
AOKI Makoto
青木 誠
Title: PRESS BRAKE CROWNING METHOD USING FORCE-INCREASING MECHANISM, AND PRESS BRAKE
Abstract:
Provided are a crowning method and a press brake wherein, when crowning with a lower table is performed, the crowning is performed while rotating eccentric shafts using a force-increasing mechanism. In this press brake crowning method a front plate 11 and a back plate 13 are provided respectively at the front and back of a lower table 5, which is supported by left and right side frames 3L and 3R in a press brake 1, and crowning is performed while rotating eccentric shafts 23, which are provided in the lower table 5 with intervals therebetween in the left-right directions. A force-increasing mechanism 41 is provided between each eccentric shaft 23 and an actuator 31 for rotating each eccentric shaft 23, the output of the actuator 31 is increased by the force-increasing mechanism 41 and is transmitted to each eccentric shaft 23, and each eccentric shaft 23 is rotated, thereby performing crowning.