GB991143A - Improvements relating to grinding wheels - Google Patents

Improvements relating to grinding wheels

Info

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
Application number
GB2427362A
Inventor
Frank Anthony Leonard Turner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Norton Abrasives Ltd
Original Assignee
Norton Abrasives Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Norton Abrasives Ltd filed Critical Norton Abrasives Ltd
Priority to GB2427362A priority Critical patent/GB991143A/en
Publication of GB991143A publication Critical patent/GB991143A/en
Expired legal-status Critical Current

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

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.
GB2427362A 1962-06-25 1962-06-25 Improvements relating to grinding wheels Expired GB991143A (en)

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)

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