Grinding pin for grinding machines comprising resin bonded selections of rough grit and fine grit
US6739954B2 · kind B2 · utility
4Cited by
9References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 1, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Aug 1, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23Q2210/002
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A grinding pin (53) for grinding notches in the edges of disc workpieces, such as semi-conductor wafers, comprises a metal spindle (132) for mounting in a grinding machine, and an adjoining cylindrical region having axially spaced sections of fine grit (160) and rough grit (162), the latter being axially nearer the spindle (132). In use on a grinding machine having a rotatable forming wheel, similar profiled notch-grinding grooves (140) and (142) are formed by the wheel in the grinding sections (162) and (160) respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.