Press device, press system, method for controlling press device, and motion creation device

Patent metadata

Field	Value
Publication number	US-2021394477-A1
Application number	US-202017292143-A
Country	US
Kind code	A1
Filing date	Jan 17, 2020
Priority date	Feb 12, 2019
Publication date	Dec 23, 2021
Grant date	—

Abstract

The press device is a press device configured to press a workpiece, and includes a slide, a bolster, a servomotor, and a control section. The slide is movable. The bolster is placed to face the slide. The servomotor drives the slide. The control section is configured to be able to execute selectively either the productivity priority mode of setting a limit value slower than the maximum press speed of the press device to the press speed when performing a pendulum motion or a reverse motion, or the moldability priority mode of setting a stop time to the servomotor without setting the limit value.

First claim

1 . A press device for pressing a workpiece, comprising:
a slide configured to be movable; a bolster placed facing the slide; a servomotor configured to drive the slide; and a control section configured to execute selectively either a first mode of setting a limit value slower than a maximum press speed of the press device to a press speed when performing a pendulum motion or a reverse motion, or a second mode of setting a first stop time to the servomotor without setting the limit value.

2 . The press device according to claim 1 , wherein
the maximum press speed is a maximum value of the press speed during a rotational motion.

3 . The press device according to claim 1 , wherein
the limit value and the first stop time are set so as not to exceed a maximum processing speed of the press device.

4 . The press device according to claim 1 , wherein
in the first mode, when an effective load factor of the servomotor exceeds a predetermined threshold value, the control section is configured to set a second stop time to the servomotor so as not to exceed the predetermined threshold value.

5 . The press device according to claim 1 , wherein
in the second mode, when an effective load factor of the servomotor exceeds a predetermined threshold value, the control section is configured to set a third stop time to the servomotor in addition to the first stop time so as not to exceed the predetermined threshold value.

6 . The press device according to claim 1 , wherein
the limit value of the press device is set as a ratio to the press speed during a rotational motion.

7 . The press device according to claim 1 , further comprising
a setting section configured to be able to set a stroke height of the slide, and a storage section configured to store first information regarding the limit value of the press speed set with respect to the stroke height, the limit value of the press speed corresponding to a maximum processing speed of the press device, and the control section being configured to set the limit value of the press speed based on the first information from the stroke height which is set in the first mode.

8 . The press device according to claim 1 , wherein
the limit value is a limit value with respect to a rotation speed of the servomotor, and the press speed is limited by setting the limit value.

9 . The press device according to claim 1 , further comprising
a setting section configured to set a stroke height of the slide, the control section including a processing speed measurement section configured to measure a processing speed based on a press working performed at the stroke height which is set in the second mode, and a first stop time setting section configured to set the first stop time based on the processing speed which is measured.

10 . The press device according to claim 9 , further comprising
a storage section configured to store second information regarding a maximum processing speed of the press device set with respect to the stroke height of the slide, the control section further including a determination section configured to determine whether or not a processing speed of the press device obtained by operating the press device using the stroke height which is set exceeds the maximum processing speed, and when the processing speed exceeds the maximum processing speed, the first time stop setting section sets a time equal to or greater than a difference between a time of one cycle at the maximum processing speed and a time of one cycle at the processing speed as the first stop time.

11 . The press device according to claim 4 , wherein
the control section includes a calculation section configured to calculate an integral value of the effective load factor of the servomotor for one cycle time in the first mode, and a second stop time setting section configured to set a time equal to or greater than a difference between a value obtained by dividing the integrated value by the predetermined threshold value and a time of the one cycle as the second stop time.

12 . The press device according to claim 5 , wherein
the control section includes a calculation section configured to calculate an integral value of the effective load factor of the servomotor for one cycle time in the second mode, and a third stop time setting section configured to set a time equal to or greater than a difference between a value obtained by dividing the integrated value by the predetermined threshold value and a time of the one cycle as the third stop time.

13 . A press system comprising:
a press device main body including a slide configured to be movable, a bolster placed facing the slide, and a servomotor configured to drive the slide; and a control device configured to selectively cause the press device main body to execute either a first mode of setting a limit value slower than a maximum press speed of the press device main body to a press speed when performing a pendulum motion or a reverse motion, or a second mode of setting a first stop time to the servomotor without setting the limit value.

14 . A method for controlling a press device configured to drive a slide with a servomotor, comprising
a control step executing selectively either a first mode of setting a limit value slower than a maximum press speed of the press device to a press speed when performing a pendulum motion or a reverse motion, or a second mode of setting a first stop time to the servomotor without setting the limit value.

15 . A program for controlling a press device configured to drive a slide with a servomotor, the program configured to cause a computer to perform a control step executing selectively either a first mode of setting a limit value slower than a maximum press speed of the press device to a press speed when performing a pendulum motion or a reverse motion, or a second mode of setting a first stop time to the servomotor without setting the limit value.

16 . A motion creation device configured to create a motion causing a press device including a servomotor to execute a pendulum motion or a reverse motion, comprising:
a selection section, either a first mode or a second mode being selected on the selection section configured to be selected in the pendulum motion or the inversion motion; and a motion creation section configured to create a motion of setting a limit value slower than a maximum press speed of the press device to a press speed when the first mode is selected and a motion of setting a first stop time to the servomotor without setting the limit value when the second mode is selected.

Assignees

• Komatsu Ind Corp

Inventors

• Yamazaki Koyo

Classifications

• B30B15/148 Primary

  Electrical control arrangements · CPC title

• B30B15/26

  Program-control arrangements · CPC title

• B30B15/28

  Arrangements for preventing distortion of, or damage to, presses or parts thereof · CPC title