JPS59143596U

JPS59143596U - press cushion device

Info

Publication number: JPS59143596U
Application number: JP3749483U
Authority: JP
Inventors: 筒井　善光
Original assignee: 株式会社アマダ
Priority date: 1983-03-17
Filing date: 1983-03-17
Publication date: 1984-09-26
Also published as: JPS6110879Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案の実施例装置の説明区、第２図１及び２
は、電磁切換弁のタイムチャート、第３図は高圧油圧発
生装置の別実施例、第４図も高圧油圧発生装置の別実施
例である。（図面の主要部を表わす符号の説明）、１・・・油圧ク
ッション、５・・・高圧側油圧発生装置、１９・・・土
部油室、２１・・・下部油室、２３・・・クッションパ
ッド、４９・・・電磁切換弁、５３・・・ブースタ。第１図１，７１．４″ ／、３一−−−−＼　１１嶋韻［と：Fig. 1 is an explanation section of the embodiment of the device of the present invention, Fig. 2 is an explanation section of the device according to the present invention;
3 is a time chart of an electromagnetic switching valve, FIG. 3 is another embodiment of a high-pressure oil pressure generator, and FIG. 4 is another embodiment of a high-pressure oil pressure generator. (Explanation of symbols representing main parts of the drawing), 1... Hydraulic cushion, 5... High pressure side hydraulic generator, 19... Dobe oil chamber, 21... Lower oil chamber, 23... Cushion pad, 49... Solenoid switching valve, 53... Booster. Figure 1 1, 71. 4″ /, 3 1---＼ 11 Shima Rin [and:

Claims

[Scope of utility model registration request]

(1) A piston that moves integrally with the cushion pad, and a double-acting hydraulic cylinder that drives the piston back and forth;
A hydraulic cushion for a press consisting of a device that supplies pressure oil to one oil chamber of a fluid pressure cylinder so as to keep the force with which the cushion pad functions constant, and a device that rapidly discharges the pressure oil from the oil chamber. A hydraulic cushion for a press, characterized in that a device is provided to keep the working pressure of the cushioning function constant, and a device is provided to rapidly reduce the working pressure when the cushioning function is to be stopped.

(2) The hydraulic cushion for a press according to claim 1, which is characterized in that a pneumatic hydraulic booster is provided as a device for keeping the working pressure of the cushion function constant.

(3) As a device for rapidly lowering the working pressure of the cushion, a switching valve is provided for switching between communicating and blocking oil chambers on both sides of the piston, as set forth in claim 1 of the utility model registration claim. Hydraulic cushion of press.

(4) The hydraulic cushion for a press as set forth in claim 1 of the utility model registration claim, characterized in that the effective working areas of the oil chambers on both sides of the piston are equal areas.

(5) A detector is installed in a part of the piston rod of the pneumatic hydraulic booster to detect a decrease in the hydraulic oil in the closed circuit that keeps the working pressure of the cushion function constant, and the detection signal from the detector detects the decrease in the hydraulic fluid in the closed circuit. A hydraulic cushion for a press according to claim 1, characterized in that a pump for replenishing hydraulic oil is provided therein.