公开(公告)号：US5644915A

公开(公告)日：1997-07-08

申请号：US637447

申请日：1996-04-25

Applicant: Paul A. Dressing ,  Dean M. Valvano

Inventor： Paul A. Dressing ,  Dean M. Valvano

IPC: B30B15/16 ,  F15B21/08 ,  F16D31/02 ,  F15B11/00

CPC classification number: B30B15/24 ,  F15B21/087

Abstract: A control system for controlling the movement of the ram of a press or press brake of the type having one or two main cylinders with pistons operatively attach to the ram. The control system comprises a programmable processor with inputs from a pressure transducer indicating the pressure applied to the one or two pistons and a linear potentiometer for each side of the ram to indicate ram position and levelness. The control system further includes a hydraulic circuit operated by outputs from the processor. The hydraulic circuit comprises a variable volume load sense-controlled pump supplying hydraulic fluid through a speed control assembly to a solenoid-actuated directional valve determining upward and downward movement of the ram. The speed control assembly comprises at least two lines connected to the output line of the pump and to the speed control assembly output line to the directional valve. At least one of the at least two speed control assembly lines is provided with a restricting orifice. At least one of the at least two speed control assembly lines is provided with a normally closed solenoid-actuated valve. All of the solenoid actuated valves of the hydraulic circuit are controlled by outputs from the processor.

Abstract translation: 一种用于控制具有一个或两个主缸的类型的压力机或压力制动器的压头的运动的控制系统，活塞可操作地附接到冲头。 该控制系统包括可编程处理器，其具有来自压力传感器的输入，其指示施加到一个或两个活塞的压力，以及用于柱塞每侧的线性电位计，以指示压头位置和水平度。 控制系统还包括由处理器的输出操作的液压回路。 该液压回路包括一个可变容积的负载感测控制泵，其通过速度控制组件向液压流体供应电磁致动的换向阀，以确定压头的向上和向下运动。 速度控制组件包括连接到泵的输出管线和连接到方向阀的速度控制组件输出线的至少两条管线。 至少两个速度控制组装线中的至少一个设置有限制孔。 所述至少两个速度控制装配线中的至少一个设置有常闭电磁致动阀。 液压回路的所有电磁致动阀都由处理器的输出控制。

公开(公告)号：US4797831A

公开(公告)日：1989-01-10

申请号：US932107

申请日：1986-11-18

Applicant: Paul A. Dressing ,  John L. Macdonald

Inventor： Paul A. Dressing ,  John L. Macdonald

IPC: B30B15/20 ,  B30B15/24 ,  G05B19/23 ,  G06F15/46 ,  B21D5/02

CPC classification number: G05B19/231 ,  B30B15/20 ,  B30B15/24 ,  Y10S72/702

Abstract: An electronic control system for operating the hydraulic cylinders associated with a press brake wherein independent control of each of the hydraulic cylinders is achieved to insure that the cylinders track against a fixed reference to insure more accurate forming of the workpiece. The cylinder tracking is under computer control which also establishes a creep speed slower than the normal forming speed near the point of ram reversal. A plurality of press brake may be operated simultaneously from the same tracking reference.

Abstract translation: 一种用于操作与压制机相关联的液压缸的电子控制系统，其中实现了对每个液压缸的独立控制，以确保气缸跟踪固定的参考，以确保更精确地形成工件。 气缸跟踪处于计算机控制之下，其也建立了在接近反冲点附近的正常成形速度下的蠕变速度。 多个压制机可以从相同的跟踪参考同时操作。