公开(公告)号：US4148203A

公开(公告)日：1979-04-10

申请号：US840315

申请日：1977-10-07

Applicant: Assadollah Farazandeh ,  Buford R. Everett

Inventor： Assadollah Farazandeh ,  Buford R. Everett

IPC: B21D5/02 ,  B30B15/24 ,  G05B19/23 ,  G05B19/4093 ,  G05B19/414

CPC classification number: G05B19/232 ,  B21D5/004 ,  B21D5/02 ,  B30B15/24 ,  G05B19/4093 ,  G05B19/4142 ,  G05B2219/34215 ,  G05B2219/35556 ,  G05B2219/36162 ,  G05B2219/41092 ,  G05B2219/41309 ,  G05B2219/42318 ,  Y02P90/265

Abstract: A computer-controlled hydraulic press brake includes an actuator and control system which automatically provides variable pre-programmable ram opening and closing strokes. A microprocessor within the control system responds to stroke parameters entered by the operator and an encoder-generated signal indicative of ram position to generate a velocity command signal defining a velocity profile for positioning the ram to the stroke limits. Closed-loop servo systems associated with each ram cylinder respond to the velocity command signal to cause movement of the ram in accordance with the velocity profile. A ram leveling circuit responsive to individual position sensors associated with respective sides of the ram compensates for ram tilt by simultaneously applying complimentary correction signals to the respective servo systems. A second velocity profile may be generated in response to stored parameters to position a back gauge concurrently with ram movement by means of a second motor drive servo system.

Abstract translation: 计算机控制的液压式制动器包括致动器和控制系统，其自动地提供可变的可预先编程的开启和关闭冲程。 控制系统内的微处理器响应由操作员输入的冲程参数和指示压头位置的编码器产生的信号，以产生速度指令信号，该速度指令信号限定将冲头定位到行程极限的速度分布。 与每个压头气缸相关联的闭环伺服系统响应于速度指令信号，以根据速度曲线引起压头的移动。 响应于与冲头的相应侧面相关联的各个位置传感器的冲击平衡电路通过同时向相应的伺服系统施加补偿校正信号来补偿冲头倾斜。 可以响应于存储的参数产生第二速度分布，以通过第二电动机驱动伺服系统与压头运动同时定位后测量器。