Servo pressing machine

Abstract

PROBLEM TO BE SOLVED: To provide a servo press provided with a testing function capable of more correctly discriminating brake performance in case of an emergency stop.SOLUTION: The servo press 1 performs the following brake performance testing as a series of operations: (a) the start of a test; (b) the drop of a slide at a prescribed speed; (c) an emergency stop signal command; (d) the operation of an electric brake and a mechanical brake; (e) the measurement of a time (stop time) from (c) to the stop of the slide and / or the calculation of the travel distance from the (c) to the stop of the slide; (f) a decision whether the stop time and / or travel is good or not; (g) practicing of the (b) to (e) only by operating an electric brake or mechanical brake when defects are decided in the (f); (h) the decision whether the stop time and / or travel is good or not for each brake; and (i) the display of the decided results. Since the servo press body is provided with a sequence for performing brake performance testing, there is no need of entrusting emergency stop confirmation inspection to inspection institutions, and the inspection can be performed in accordance with the convenience of working.

Description

technical field [0001] The present invention relates to a servo press that uses a servo motor to linearly move a slide. In particular, it relates to a high-safety servo press equipped with an emergency stop check function. Background technique [0002] The servo press uses a motion conversion mechanism that converts rotational motion of a servo motor such as an AC servo motor into linear motion to linearly move a slider (ram). In this servo press, the position / speed of the slider can be freely controlled, and the press pressure can also be easily controlled. Therefore, the forming accuracy of the stamped product is improved, and the productivity is also high, so it has been widely used in place of the mechanical type in recent years. [0003] In such a servo press, a mechanical brake or an electric brake is generally used to stop the slide in an emergency. A mechanical brake, for example, provides frictional resistance to an output shaft of a motor or an output shaft of a...

AI Technical Summary

Problems solved by technology

However, in this press machine, when there is an abnormality in the emergency stop, it is not possible to determine exactly which part of the abnormality occurred, and it is difficult to obtain a subsequent handling policy.

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