GB991143A - Improvements relating to grinding wheels - Google Patents
Improvements relating to grinding wheelsInfo
- Publication number
- GB991143A GB991143A GB2427362A GB2427362A GB991143A GB 991143 A GB991143 A GB 991143A GB 2427362 A GB2427362 A GB 2427362A GB 2427362 A GB2427362 A GB 2427362A GB 991143 A GB991143 A GB 991143A
- Authority
- GB
- United Kingdom
- Prior art keywords
- copper
- resin
- furfural
- per cent
- volume per
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
- B24D3/344—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent the bonding agent being organic
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
A grinding wheel for electrolytically assisted grinding having an electrical resistivity below 0.0065 ohms/c.c. is formed from a moulded and cured mixture of 10 to 50 volume per cent of (a) electrically non-conducting abrasive particles, and up to 90% volume per cent of (b) a combination of 40 to 75 volume per cent of deoxidized copper or copper alloy powder having a specific resistance less than 7.5 microhms/cm. and 60 to 25 volume per cent of a powdered thermosetting resin. A liquid binder, e.g. furfural or a liquid synthetic resin may also be included in the mixture. In examples, wheels are made from alumina, copper and phenol-formaldehyde resin, with and without furfural as a binding assistant. The phenolic resin may be replaced by an epoxy resin.ALSO:A grinding wheel for electrolytically assisted grinding having an electrical resistivity below 0.0065 ohm/c.c., is formed from a moulded and cured mixture of (a) 10-50% (by volume) of electrically non-conducting abrasive particles and (b) up to 90% a combination of 40-75% of deoxidized copper or copper alloy powder of specific resistance below 7.5 microhm/cm. and 60-25% of a powdered thermosetting resin. A liquid binder e.g. furfural or a liquid synthetic resin may also be included to assist shaping before cure. In examples wheels are made from alumina, copper and phenolic or epoxy resin, with and without furfural and have resistivities of 0.000434 and 0.0059 ohms/ cm. respectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2427362A GB991143A (en) | 1962-06-25 | 1962-06-25 | Improvements relating to grinding wheels |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2427362A GB991143A (en) | 1962-06-25 | 1962-06-25 | Improvements relating to grinding wheels |
Publications (1)
Publication Number | Publication Date |
---|---|
GB991143A true GB991143A (en) | 1965-05-05 |
Family
ID=10209130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2427362A Expired GB991143A (en) | 1962-06-25 | 1962-06-25 | Improvements relating to grinding wheels |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB991143A (en) |
-
1962
- 1962-06-25 GB GB2427362A patent/GB991143A/en not_active Expired
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