Title:
プレス機械及びプレス加工方法
Document Type and Number:
Japanese Patent JP6550481
Kind Code:
B2
Abstract:
In a press machine, a ram (1) is vertically moved by rotations of an eccentric shaft. The press machine includes a striker housing (9) provided beneath the ram (1) and vertically moved together with the ram (1), a striker (3) vertically movable with respect to the striker housing (9), and a hold mechanism (11, 13, 15, 19, 21, 25) for holding the striker (3) at a lift-up position and a lift-down position. According to the press machine, press working can be done surely even when reciprocating rotations of the eccentric shaft are done in a vicinity of a rotational angle 90° (or 270°) of the eccentric shaft.
Inventors:
Keiji Kawamoto
Application Number:
JP2018002471A
Publication Date:
July 24, 2019
Filing Date:
January 11, 2018
Export Citation:
Assignee:
Amada Holdings Co., Ltd.
International Classes:
B30B1/26; B21D28/20; B30B15/06; B30B15/14
Domestic Patent References:
| JP2000024729A | ||||
| JP2003340599A | ||||
| JP2004122172A |
Foreign References:
| DE102007012638A1 |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Shunichi Takahashi
Masakazu Ito
Toshio Takamatsu
Shunichi Takahashi
Masakazu Ito
Toshio Takamatsu