JPS623221U

JPS623221U -

Info

Publication number: JPS623221U
Application number: JP9315385U
Authority: JP
Priority date: 1985-06-20
Filing date: 1985-06-20
Publication date: 1987-01-10

Description

[Brief explanation of the drawing]

第１図は本考案にかゝるプレス荷重の制御装置
の基本構造を示す系統図、第２図はその一部であ
る空気圧制御装置の構造の一例を示す系統図、第
３図はアウタラムシリンダ内油圧とアウタ荷重と
の相関を示す特性図、第４図は本制御装置の実施
態様を示す系統図、第５図はメカニカル複動プレ
ス機械の構造を模式的に示す斜視図、第６図は従
来のメカニカル複動プレス機械におけるアウタ油
気圧源を示す系統図である。５……アウタラム、６……アウタラムシリンダ
、７……ハンドロブランクホルダ、１１……空気
圧源、１３……エアタンク、２１……空気圧制御
回路、２２……圧力センサ、２３……コントロー
ラ、２４……アンプ、２５……荷重表示計、２６
……レギユレータ、２７……エア電流制御レギユ
レータ、２８……切換弁、２９……リリーフ弁。 Fig. 1 is a system diagram showing the basic structure of the press load control device according to the present invention, Fig. 2 is a system diagram showing an example of the structure of the pneumatic pressure control device that is a part of the system, and Fig. 3 is the system diagram of the outer ram. A characteristic diagram showing the correlation between the cylinder oil pressure and the outer load, Fig. 4 is a system diagram showing an embodiment of this control device, Fig. 5 is a perspective view schematically showing the structure of a mechanical double-acting press machine, and Fig. 6 The figure is a system diagram showing an outer hydraulic pressure source in a conventional mechanical double-action press machine. 5... Outer ram, 6... Outer ram cylinder, 7... Handro blank holder, 11... Air pressure source, 13... Air tank, 21... Air pressure control circuit, 22... Pressure sensor, 23... Controller, 24 ...Amplifier, 25...Load indicator, 26
... Regulator, 27 ... Air current control regulator, 28 ... Switching valve, 29 ... Relief valve.

Claims

[Claims for Utility Model Registration] (1) An air pressure control circuit that controls the air pressure supplied to the air chamber is provided in the air pressure circuit connected to the air chamber of the hydro blank holder, and connects the hydro blank holder and the outer ram cylinder. The hydraulic circuit is equipped with a pressure sensor that detects the oil pressure inside the outer ram cylinder, and furthermore, the oil pressure-outer load conversion characteristic and the set outer load value at the bottom dead center of the outer ram are stored in advance, and the outer ram is detected from the pressure sensor. A controller receives a hydraulic pressure signal at bottom dead center, converts it into an outer load value, compares it with the set outer load value, and outputs a control signal for changing the air pressure to the front air pressure control circuit until the two values match. A press load control device characterized by being provided. (2) The press load control device according to claim 1 of the utility model registration, characterized in that an air pressure control circuit is interposed between the air pressure source connected to the air chamber of the hydro blank holder and the air tank. (3) The air pressure control circuit is characterized by comprising a regulator that adjusts the air pressure supplied to the air tank, an air current control regulator that is connected to a controller and controls the operation of the regulator, and a switching circuit that reduces the pressure inside the air tank. A press load control device according to claim 1 or 2 of the utility model registration claim. (4) Between the controller and the pneumatic control circuit,
The press load control device according to claim 1, further comprising an amplifier for relaying control signals. (5) The press load control device according to claim 1 of the utility model registration, characterized in that the controller is provided with a load indicator for displaying the outer load value.