Grinding method of workpiece

Patent metadata

Field	Value
Publication number	US-2022134509-A1
Application number	US-202117450572-A
Country	US
Kind code	A1
Filing date	Oct 12, 2021
Priority date	Nov 4, 2020
Publication date	May 5, 2022
Grant date	—

Abstract

A grinding method includes a first grinding step of executing grinding feed of a rough grinding unit and grinding the workpiece to a predetermined thickness while supplying grinding water with a first grinding water amount that allows suppression of wear of grinding abrasive stones and a second grinding step of, after executing the first grinding step, promoting dressing of the grinding abrasive stones to prepare for processing of the next workpiece through executing grinding feed of the rough grinding unit and grinding the workpiece to the finished thickness while supplying the grinding water with a second grinding water amount that increases wear of the grinding abrasive stones and promotes self-sharpening through reduction relative to the first grinding water amount.

First claim

What is claimed is:

1 . A grinding method of a workpiece that is a grinding method in which the workpiece is thinned to a finished thickness by using a grinding apparatus including a holding table that holds the workpiece, a grinding unit having a spindle on which a grinding wheel on which grinding abrasive stones that grind the workpiece held by the holding table are annularly disposed is mounted and a motor that rotationally drives the spindle, a grinding feed unit that causes the grinding unit to get further away and closer to the holding table, a grinding water supply unit that supplies grinding water to an upper surface of the workpiece held by the holding table in such a manner that a flow rate is adjustable, and a control unit that controls each of the units, the grinding method comprising:
a first grinding step of executing grinding feed of the grinding unit and grinding the workpiece to a predetermined thickness while supplying the grinding water with a first grinding water amount that allows suppression of wear of the grinding abrasive stones; and a second grinding step of, after executing the first grinding step, promoting dressing of the grinding abrasive stones to prepare for processing of a next workpiece through executing grinding feed of the grinding unit and grinding the workpiece to the finished thickness while supplying the grinding water with a second grinding water amount that increases wear of the grinding abrasive stones and promotes self-sharpening through reduction relative to the first grinding water amount.

2 . The grinding method of a workpiece according to claim 1 , wherein
the grinding unit includes
a rough grinding unit that uses a grinding wheel with a coarse grain size, and
a finish grinding unit that uses a grinding wheel with a fine grain size and grinds the workpiece ground by the rough grinding unit, and
the first grinding step and the second grinding step are executed in the rough grinding unit.

Assignees

• Disco Corp

Inventors

• Akita Daisuke
• Suzuki Yoshikazu
• Saito Makoto

Classifications

• Y02P70/10

  Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working · CPC title

• B24B27/0023

  grinding machines with a plurality of working posts · CPC title

• B24B57/02

  for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents · CPC title

• B24B51/00

  Arrangements for automatic control of a series of individual steps in grinding a workpiece (if applicable to other machine tools, G05B takes precedence) · CPC title

• B24B47/20

  relating to feed movement · CPC title