Vibration information display device for machine tool that acquires information only during time that vibration value and rate of change exceed respective threshold

Patent metadata

Field	Value
Publication number	US-10228677-B2
Application number	US-201615097533-A
Country	US
Kind code	B2
Filing date	Apr 13, 2016
Priority date	May 29, 2015
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

A vibration information display device includes a monitor, a vibration information acquisition unit, an operating information acquisition unit, a storage unit, and a display control unit. The monitor displays information on the chatter vibrations. The vibration information acquisition unit acquires vibration information when the chatter vibrations are detected. The operating information acquisition unit acquires operating information of the machine tool when the chatter vibrations are detected. The storage unit stores the acquired vibration information and operating information. The display control unit displays the vibration information and the operating information stored in the storage unit on the monitor. Alternatively, the display control unit displays the vibration information stored in the storage unit on the monitor together with trajectory information of a blade edge of the tool included in the operating information.

First claim

What is claimed is:

1. A vibration information display device for a machine tool in which a tool or workpiece is rotated to process the workpiece, the vibration information display device being disposed in the machine tool having a vibration detection configured to detect chatter vibrations occurring during processing, the vibration information display device comprising:
a monitor configured to display information on the chatter vibrations;
a vibration information acquisition unit configured to acquire vibration information only during time that a vibration value exceeds a vibration threshold and a rate of change of vibration exceeds a set value;
an operating information acquisition unit configured to acquire operating information of the machine tool only during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value;
a storage unit storing vibration values acquired during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value, and said storage unit storing operating information acquired during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value; and
a display control unit configured to display on the monitor vibration information acquired during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value, and operating information acquired during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value, alternatively, the display control unit being configured to display on the monitor vibration information acquired during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value together with trajectory information of a blade edge of the tool included in operating information acquired during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value.

2. The vibration information display device for machine tool according to claim 1 , wherein the vibration information display device further comprises:
a vibration-restraining function configured to ensure restraining detected chatter vibrations, wherein
the display control unit is configured to display the vibration information acquired during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value, together with an accomplished state of the vibration-restraining function on the monitor.

3. The vibration information display device for machine tool according to claim 2 , wherein the vibration information display device further comprises:
an input unit to the monitor, wherein
when the input unit is operated, the display control unit is configured to display a screen regarding countermeasures to restrain chatter vibrations.

4. The vibration information display device for machine tool according to claim 3 , wherein
to display the vibration information on the monitor together with the trajectory information of the blade edge of the tool, the display control unit is configured to display a position of chatter vibrations on a trajectory of the blade edge of the tool, and when the position is selected with the input unit, [1] the display control unit is configured to display the screen regarding countermeasures to restrain the chatter vibrations at the selected position on the monitor, and [2] the display control unit is configured to ensure changing information required to create the screen with the input unit.

5. The vibration information display device for machine tool according to claim 4 , wherein
the positions of the chatter vibrations on the trajectory of the blade edge of the tool are configured to be selectable in plural with the input unit, and when a plurality of the positions are selected with the input unit, the monitor is configured to display a screen regarding countermeasures to restrain the chatter vibrations at each of the selected positions.

Assignees

• Okuma Machinery Works Ltd

Inventors

• Ando Tomoharu

Classifications

• B23Q15/12 Primary

  Adaptive control, i.e. adjusting itself to have a performance which is optimum according to a preassigned criterion · CPC title

• G05B19/404 Primary

  characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia (G05B19/19, G05B19/41 take precedence) · CPC title

• G05B2219/41256

  Chattering control · CPC title

• G05B2219/37081

  Display machining parameters · CPC title

• Y02P90/265

  Cross-Sectional Technologies · mapped topic