公开(公告)号：US06581427B2

公开(公告)日：2003-06-24

申请号：US09768713

申请日：2001-01-24

Applicant: Gerrit Gerritsen

Inventor： Gerrit Gerritsen

IPC: B21J740

CPC classification number: B21D5/02 ,  Y10T29/53235

Abstract: A method of adjusting the stroke of a press brake having a movable beam (1) supporting a punch (2), a fixed beam (3) supporting a die (4), means of displacing (5, 5′) the movable beam with respect to the fixed beam, said displacement means resting on side frames (6, 6′) immovably attached to the fixed beam, linear encoders (9, 9′) for measuring the displacement of the movable beam with respect to the side frames, at least one sensor (8, 8′) measuring a physical parameter (p) varying with the force exerted by said punch on a metal sheet placed on said die, and an electronic device for controlling (7) the bending movement controlling the speed of said displacement movement between top dead center and bottom dead center (BDC), provided with a calculation means for correcting the value of said bottom dead center depending on the measurement of said displacement and said physical parameter. The difference in thickness between the actual thickness of the metal sheet and the reference value (e) of the thickness of the metal sheet is measured by comparing the actual position of said displacement at which there occurs a predetermined variation &Dgr;p of said physical parameter (p) with the theoretical position of said displacement where this variation &Dgr;p should occur, and the electronic control device (7) calculates a correction of bottom dead center by taking account of said difference in thickness.

Abstract translation: 一种调整具有支撑冲头（2）的可移动梁（1）和支撑模具（4）的固定梁（3）​​的冲压制动器的行程的方法，用于将活动梁移动（5,5'）的装置 相对于固定光束，所述位移装置搁置在不可移动地附接到固定光束的侧框架（6,6'）上，用于测量可移动光束相对于侧框架的位移的线性编码器（9,9'）， 测量由所述冲头施加在放置在所述模具上的金属板上的力所改变的物理参数（p）的至少一个传感器（8,8'）和用于控制（7）控制所述模具的速度的弯曲运动的电子设备 具有上死点和下死点（BDC）之间的位移运动，具有根据所述位移和所述物理参数的测量值校正所述下死点值的计算装置。 金属板的实际厚度与金属板的厚度的参考值（e）之间的厚度差异是通过比较所述位移的实际位置，其中出现所述物理参数的预定变化量DELTAp（p ），其中所述位移的理论位置将发生该变化DELTAp，并且电子控制装置（7）通过考虑所述厚度差来计算下死点的校正。