Grinding apparatus

Patent metadata

Field	Value
Publication number	US-2022281063-A1
Application number	US-202217651466-A
Country	US
Kind code	A1
Filing date	Feb 17, 2022
Priority date	Mar 5, 2021
Publication date	Sep 8, 2022
Grant date	—

Abstract

There is provided a grinding apparatus including a chuck table configured to hold a workpiece, a grinding unit configured to grind the workpiece held by the chuck table by grinding stones fixed to a grinding wheel, a grinding feed mechanism configured to raise or lower the grinding unit, a reading unit configured to read a thickness of a base which thickness is recorded on a recording medium on which the thickness of the base of the grinding wheel is recorded, a base thickness storage section configured to store the thickness of the base which thickness is read by the reading unit, and a detecting unit configured to make the grinding unit perform processing by the grinding feed mechanism, and detect a fitting surface of a mount and the lower surface of a grinding stone of the grinding wheel fitted to the mount.

First claim

What is claimed is:

1 . A grinding apparatus comprising:
a chuck table configured to hold a workpiece by a holding surface; a grinding unit in which a grinding wheel having grinding stones arranged annularly on a lower surface of a base is fitted to a mount coupled to a lower end of a spindle, the grinding unit being configured to grind the workpiece by the grinding stones; a grinding feed mechanism configured to raise or lower the grinding unit in a direction perpendicular to the holding surface; a control unit; a reading unit configured to read a thickness of the base, the thickness being recorded on a recording medium on which at least the thickness of the base of the grinding wheel is recorded; a base thickness storage section configured to store the thickness of the base, the thickness being read by the reading unit; and a detecting unit configured to lower the grinding unit by the grinding feed mechanism, and detect a fitting surface of the mount and a lower surface of the grinding stones of the grinding wheel fitted to the mount; the control unit including
a fitting surface height storage section configured to store a height of the grinding unit when the grinding unit is lowered by the grinding feed mechanism and the detecting unit detects the fitting surface of the mount,
a grindstone lower surface height storage section configured to store a height of the grinding unit when the grinding unit is lowered by the grinding feed mechanism and the detecting unit detects the lower surface of the grinding stones after the grinding wheel is fitted to the mount, and
a grindstone remaining amount calculating section configured to calculate a remaining amount of the grinding stones by subtracting the thickness of the base, the thickness being stored in the base thickness storage section, from a difference between the height stored in the fitting surface height storage section and the height stored in the grindstone lower surface height storage section.

Assignees

• Disco Corp

Inventors

• Genozono Jiro

Classifications

• B24B27/0046 Primary

  Column grinding machines · CPC title

• B24B27/02

  Bench grinders · CPC title

• B24B47/20

  relating to feed movement · CPC title

• B24B41/06

  Work supports, e.g. adjustable steadies (B24B37/27 takes precedence) · CPC title

• B24B49/12

  involving optical means · CPC title