US 10,766,062 B2Granted

Servomotor control device in processing machine

AssigneeFanuc Corporation

InventorsShougo Shinoda, Tsutomu Nakamura

Life of this patent

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Abstract

A servomotor control device in a processing machine that processes an object to be processed on a press supporting unit driven by a servomotor includes: a pressure detection unit configured to detect an actual pressure applied on the object to be processed; a pressure command generation unit configured to generate a pressure command that commands a pressure that the object to be processed preferably receives; a pressure control unit configured to generate a speed command for the servomotor on the basis of the pressure command generated by the pressure command generation unit and the actual pressure detected by the pressure detection unit; and a speed command limiting unit configured to limit the speed command generated by the pressure control unit using a predetermined value.

Claims7

Dependent claims

A servomotor control device in a processing machine configured to process an object to be processed on a press support driven by a second servomotor by applying pressure by means of a press driven by a first servomotor, comprising:

a first position sensor configured to detect an actual position of the first servomotor;
a pressure sensor configured to detect an actual pressure applied by the press to the object to be processed;
and
a processor configured to:
generate a position command for controlling the first servomotor;
generate a speed command for controlling the first servomotor, based on the position command generated and the actual position detected;
generate a pressure command to control a pressure applied by the press to the object to be processed;
generate a speed command for controlling the second servomotor, based on the pressure command generated and the actual pressure detected;
and
limit the speed command generated for controlling the second servomotor using a predetermined value.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/213,342Filed 7 Dec 2018
Priority: JP 2017-24672522 Dec 2017
Published: US 2019/0193139 A127 Jun 2019
Granted: 8 Sep 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B21J 15/285
Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups: for controlling the rivet upset cycle
B21J 15/28
Riveting machines: control devices specially adapted to riveting machines not restricted to one of the preceding subgroups
G05B 19/19
Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to…
G05B 2219/45126
Nc applications: riveting machine