US 9,808,849 B2
Slide cushion device of press machine
Yasuyuki Kohno, Kanagawa (JP)
Assigned to AIDA ENGINEERING, LTD., Kanagawa (JP)
Filed by AIDA ENGINEERING, LTD., Sagamihara-shi, Kanagawa (JP)
Filed on Dec. 1, 2016, as Appl. No. 15/366,237.
Claims priority of application No. 2015-234450 (JP), filed on Dec. 1, 2015.
Prior Publication US 2017/0151600 A1, Jun. 1, 2017
Int. Cl. B21D 24/08 (2006.01); B21D 24/02 (2006.01); B21D 24/14 (2006.01)
CPC B21D 24/02 (2013.01) [B21D 24/08 (2013.01); B21D 24/14 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A slide cushion device of a press machine, comprising:
a plurality of hydraulic cylinders integrally formed in a board included in a slide of the press machine, or in a board provided immediately below the slide;
a pressing member that is disposed in a recessed portion of an upper die that vertically moves together with the slide, in a vertically movable manner, and that presses a material with a projecting portion of a lower die facing the upper die;
a plurality of cushion pins that is provided in the pressing member and penetrates the upper die to be brought into contact with a piston member of the hydraulic cylinder, wherein a number of the plurality of cushion pins is less than a number of hydraulic cylinders disposed in a plane of projection of the recessed portion of the upper die; and
a slide cushion hydraulic device that controls at least hydraulic pressure that is to be supplied to a compression chamber of the hydraulic cylinder with which the cushion pins are to be brought into contact.