Title:
MULTI-EDGED MACHINING TOOL FOR POST-MACHINING OF BORES
Document Type and Number:
WIPO Patent Application WO/2010/054641
Kind Code:
A3
Abstract:
The invention relates to a multi-edged machining tool for the post-machining or precision machining of bores, in particular to a reamer for machining deep bores or several axially interspaced bores of the same dimensions and quality, such as bores for receiving bearing bushes for a camshaft. The tool has at least one cutting insert (32) with a pre-determined nominal diameter measurement and with cutting edges that are distributed substantially uniformly around the periphery, in addition to a guide body assembly that is axially offset in relation to said edges. The aim of the invention is to improve the guide accuracy whilst providing greater flexibility during the adaptation of the tool to the machining problem at hand. To achieve this, the guide body assembly is an integral component of a substantially cylindrical guide body (36) that consists of a solid carbide. Said guide body forms at least n helical guide ribs (38) which are equidistant around the periphery and which have a nominal diameter measurement (D38) that is substantially smaller than the nominal diameter measurement (D32) of the cutting insert (32) by a value equating to double the dimension of the lubricant gap that is formed during the operation of the tool. Each guide rib (38) extends over an angle of contact or a central angle that is greater than 360°/n, where n ≥ 2.
Inventors:
BITZER JOCHEN (DE)
HECKEL GERD (DE)
HECKEL GERD (DE)
Application Number:
PCT/DE2009/001596
Publication Date:
July 22, 2010
Filing Date:
November 13, 2009
Export Citation:
Assignee:
GUEHRING OHG (DE)
BITZER JOCHEN (DE)
HECKEL GERD (DE)
BITZER JOCHEN (DE)
HECKEL GERD (DE)
International Classes:
B23D77/00
Foreign References:
| JPS52131293A | 1977-11-04 | |||
| JPS5955624U | 1984-04-11 | |||
| JPS5628824U | 1981-03-18 | |||
| JPH01310816A | 1989-12-14 |
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