Dressing, honing and grinding tool

Abstract

In a negative mould (1) closed by a lid (3), hard material abrasive grains (5) are nickel-attached to the peripheral inside surface. The negative mould (1) contains, in addition to the outside contour (4) of the tool to be manufactured, also the surfaces for the location bore (7) and the end face locations (7') of the said tool. Subsequently the inner space of the negative mould (1) is completely filled with a casting mass (6) interspersed with solid particles (8) and the said mass allowed to harden. The mould (1) is removed by machining or etching. This process permits the inexpensive and economic manufacture of tools coated with hard material abrasive grains.

Description

FIELD AND BACKGROUND OF THE INVENTION[0001] Tools of which the working surfaces are provided with a layer of hard material abrasive grains, such as CBN or diamond, are being used more and more in many manufacturing fields as grinding, honing, cut-off grinding or dressing tools under the designation CBN grinding wheel or grinding worm, CBN honing stone, cut-off grinding disc, form or profile dressing roller, diamond dressing gear etc. Particularly in those applications where they are employed as profile grinding wheel, profile dressing roller or dressing gear, the demands made on the topological accuracy of their cutting (abrading) surface are high. Since a subsequent machining of the hard abrasive grain studded cutting surfaces is only possible to a limited extent and at great expenditure, such tools are often made by the so-called reversal process, the tool being built up -starting with an exactly made negative mould - from the outside, i.e. the peripheral hard material abrasive gr...

AI Technical Summary

Problems solved by technology

Since a subsequent machining of the hard abrasive grain studded cutting surfaces is only possible to a limited extent and at great expenditure, such tools are often made by the so-called reversal process, the tool being built up -starting with an exactly made negative mould - from the outside, i.e. the peripheral hard material abrasive grain layer, inwards to the tool-locating bore.

The numerous manufacturing operations and the long bath times for the nickel-embedding of the hard abrasive grains result in long manufacturing times, however, and high manufacturing costs which limit the economic efficiency of the processes in which they are currently used.

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