公开(公告)号：US4784058A

公开(公告)日：1988-11-15

申请号：US80477

申请日：1987-07-31

Applicant: Noriharu Nakagawa ,  Masanobu Kurumaji ,  Kazuyuki Kijayama ,  Koichi Fukushima ,  Nobuo Kimura ,  Satoshi Hirota ,  Hiroaki Kondo ,  Hiroyuki Kuwano ,  Toshiaki Akita ,  Tsutomu Sano

Inventor： Noriharu Nakagawa ,  Masanobu Kurumaji ,  Kazuyuki Kijayama ,  Koichi Fukushima ,  Nobuo Kimura ,  Satoshi Hirota ,  Hiroaki Kondo ,  Hiroyuki Kuwano ,  Toshiaki Akita ,  Tsutomu Sano

IPC: B30B15/24

CPC classification number: B30B15/245

Abstract: A press working control method for controlling the press working operation of a press having a pressure cylinder for applying a working pressure to a workpiece, a press slide operatively connected to the pressure cylinder and carrying a movable die, a bed fixedly mounted with a fixed die, a plurality of control cylinders supporting the press slide in a level position during the press working operation, and a press control system for carrying out the press working control method. The press control system comprises a first pressure detector for detecting the operative pressure of the pressure cylinder, quick-response control valves each for regulating the height of the control cylinder, height detectors each for detecting the height of the control cylinder, second pressure detectors each for detecting the operative pressure of the control cylinder, servovalves each for detecting the operative pressure of the control cylinder, and a control unit including a computer for deciding manipulated variables for the height and operative pressure control of the control cylinders on the basis of data obtained by the detectors. The respective heights of the control cylinders are regulated individually so that the press slide is maintained in a level position during the press working operation, while the respective operative pressure of the control cylinders are regulated so that a desired working pressure is applied to the workpiece.

Abstract translation: 一种压制工作控制方法，用于控制具有用于向工件施加工作压力的压力缸的压力机的冲压加工操作，可操作地连接到压力缸并承载可动模具的压力机滑块，固定地安装有固定模具的床 在冲压加工动作期间将压入滑块支撑在水平位置的多个控制缸，以及用于进行冲压加工控制的压力控制系统。 压力控制系统包括用于检测压力缸的工作压力的第一压力检测器，用于调节控制气缸高度的快速响应控制阀，用于检测控制气缸高度的高度检测器，每个 用于检测控制气缸的操作压力，用于检测控制气缸的操作压力的伺服阀，以及包括计算机的控制单元，用于基于获得的数据来确定控制气缸的高度和操作压力控制的操纵变量 由检测器。 控制缸的相应高度被单独调节，使得在压力加工操作期间压力机滑块保持在水平位置，同时调节控制气缸的相应操作压力，使得对工件施加期望的工作压力。

公开(公告)号：US5071603A

公开(公告)日：1991-12-10

申请号：US283925

申请日：1988-12-13

Applicant: Masanobu Kurumaji ,  Naoki Takeuchi ,  Tutomu Sano ,  Kazuyuki Kajiyama ,  Noriharu Nakagawa ,  Hiroaki Kondo ,  Etujiro Imanishi ,  Hiroshi Ueda ,  Yoshihiro Fukuda

Inventor： Masanobu Kurumaji ,  Naoki Takeuchi ,  Tutomu Sano ,  Kazuyuki Kajiyama ,  Noriharu Nakagawa ,  Hiroaki Kondo ,  Etujiro Imanishi ,  Hiroshi Ueda ,  Yoshihiro Fukuda

IPC: B30B15/20 ,  B30B15/22 ,  B30B15/26 ,  B29C45/80

CPC classification number: B30B15/26 ,  B29C43/58 ,  B30B15/20 ,  B30B15/22 ,  B29C2043/5808

Abstract: A method of controlling a hydraulic press wherein changing over from velocity control to pressure control can be effected at an optimum point of time in accordance with a condition of material being filled. When a movable mold half of a metal mold is moved by a hydraulic cylinder to compression mold a work within a cavity defined in the metal mold, the velocity of movement of the mold half by the hydraulic cylinder is controlled until pressurization of the work is started, but after starting of the pressurization, the pressurizing force of the hydraulic cylinder is controlled. During the velocity control, a parameter which varies as the compression proceeds is successively detected during the velocity control, and changing over from the velocity control to the pressure control is effected at a point of time when the detected parameter coincides with a preset value--that is, when the work is fully filled in the cavity. A device for controlling a hydraulic press is also disclosed wherein optimal pressure control can be assured in accordance with a current condition of material for molding.