公开(公告)号：US5910183A

公开(公告)日：1999-06-08

申请号：US5334

申请日：1998-01-09

Applicant: Jesse Carl Ford ,  Larry Alexander Polen

Inventor： Jesse Carl Ford ,  Larry Alexander Polen

IPC: B21D25/04 ,  B21D11/02 ,  B21D25/00 ,  B21D43/10

CPC classification number: B21D11/02 ,  B21D25/00

Abstract: A stretch-forming machine of the type wherein a pair of opposed curving jaws grips opposing ends of a metal sheet to be stretch-formed in a curved configuration. Each of the jaws are formed of an array of adjacent grippers movable relative to each other by respective hydraulic cylinders to define a part of the curve of the jaw. The improvement to the stretch-forming machine which is the subject of this application comprises a closed-loop servo-control means for moving each one of the grippers into a predetermined position relative to each other. Each of the servo-control means comprises a hydraulic cylinder position controller carried by the hydraulic cylinder of the one gripper for controlling hydraulic fluid flow to the hydraulic cylinder responsive to stored data representing the desired predetermined position of one of the grippers. A motor is provided for actuating the position controller in response to the data received by the position controller to move the hydraulic cylinder. Hydraulic cylinder position feedback means is positioned on the hydraulic cylinder for sensing the position of the hydraulic cylinder and communicating a signal representing the position of the hydraulic cylinder to the position controller.

公开(公告)号：US6018970A

公开(公告)日：2000-02-01

申请号：US177184

申请日：1998-10-22

Applicant: Jesse Carl Ford ,  Larry Alexander Polen

Inventor： Jesse Carl Ford ,  Larry Alexander Polen

IPC: B21D25/04 ,  B21D11/02 ,  B21D25/00 ,  B21D43/10

CPC classification number: B21D11/02 ,  B21D25/00

Abstract: A stretch-forming machine of the type wherein a pair of opposed curving jaws grips opposing ends of a metal sheet to be stretch-formed in a curved configuration. Each of the jaws are formed of an array of adjacent grippers movable relative to each other by respective hydraulic cylinders to define a part of the curve of the jaw. The improvement to the stretch-forming machine which is the subject of this application comprises a closed-loop servo-control means for moving each one of the grippers into a predetermined position relative to each other. Each of the servo-control means comprises a hydraulic cylinder position controller carried by the hydraulic cylinder of the one gripper for controlling hydraulic fluid flow to the hydraulic cylinder responsive to stored data representing the desired predetermined position of one of the grippers. A motor is provided for actuating the position controller in response to the data received by the position controller to move the hydraulic cylinder. Hydraulic cylinder position feedback means is positioned on the hydraulic cylinder for sensing the position of the hydraulic cylinder and communicating a signal representing the position of the hydraulic cylinder to the position controller.

Abstract translation: 一种拉伸成形机，其中一对相对的弯曲夹爪以弯曲的形状夹持在金属板的相对端部以进行拉伸成形。 每个夹爪由相邻夹具的阵列形成，相邻的夹具可通过相应的液压缸相对于彼此移动，以限定颚的曲线的一部分。 作为本申请的主题的拉伸成型机的改进包括用于将每个夹持器相对于彼此移动到预定位置的闭环伺服控制装置。 每个伺服控制装置包括由一个夹持器的液压缸承载的液压缸位置控制器，用于根据存储的代表一个夹具的预定位置的数据来控制液压缸的液压流体。 提供电动机以响应于位置控制器接收的数据来驱动位置控制器以移动液压缸。 液压缸位置反馈装置位于液压缸上，用于感测液压缸的位置，并将表示液压缸位置的信号传递到位置控制器。