Device and method for measuring and adjusting pressing load values on a press

摘要

A pressing load measuring device including a memory (104) for storing a data map representative of a relationship between the output level of a strain sensor (90) attached to a press frame (12) and the actual pressing load value on the press, and a converter (92) for converting the output of the strain sensor into the pressing load value on the basis of the sensor output and according to the stored relationship. Local pressing load values acting on local portions of a press slide (14,160) through fluid-actuated cylinders (44,244) are measured by a method wherein the actual local pressing load values at the local portions of the press slide are measured, and the pressure values of a fluid in the fluid-actuated cylinders are adjusted independently of each other so that the measured actual local pressing load values at the local portions of the press slide substantially coincide with respective predetermined optimum values.