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Honing tool for honing blind bores

a technology for honing tools and blind bores, applied in the field of honing tools, can solve the problems of limited idle travel, and achieve the effects of reducing wear and tear, keeping the bore straight, and not so fas

Inactive Publication Date: 2013-05-09
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a tool used for machining by honing that improves and simplifies the process, even in challenging geometries. It especially becomes useful when a straight bore needs to be machined in a small idle travel. The tool has two honing stones that can be adjusted close to the end of the tool, and the outermost stone has higher wear resistance than the other stones, which results in a wider bore at the end. This compensates for increased idle travel on the other side of the bore.

Problems solved by technology

In the case of a blind bore, the lower idle travel is however severely limited.

Method used

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  • Honing tool for honing blind bores
  • Honing tool for honing blind bores
  • Honing tool for honing blind bores

Examples

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Embodiment Construction

[0019]FIG. 1 shows a honing tool 1 and a work piece 2 in a schematic depiction according to a first exemplary embodiment of the invention.

[0020]The honing tool 1 comprises a stone carrier 3 (FIG. 2), a honing tool body 3′ and a cylindrical section 4, on which the honing tool 1 can be clamped into a chuck of a machine. By way of illustration, the honing tool 1 is introduced into a bore 5, which is configured as a blind bore 5. In this case, the blind bore 5 has an expanded section 7 at a lower end 6. In addition, provision is made for a bore 8 with reduced diameter, which opens out into the expanded section 7.

[0021]The expanded section 7 specifies a limited idle travel 9 for machining the bore using the honing tool 1. The limited idle travel 9 is hereby limited by a lower end of the honing tool body 3′ striking against the lower end 6 of the expanded section 7.

[0022]The honing tool 1 has a longitudinal axis 15. In order to machine the bore 5, the honing tool 1 is displaced in the dir...

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Abstract

The invention relates to a honing tool (1) that is suitable in particular for honing blind bores (5), comprising a stone carrier (3), a first honing stone segment (16) and a second honing stone segment (17). The first honing stone segment (16) and the second honing stone segment (17) are fastened in a groove (22) of the stone carrier (3). In addition, the stone carrier (3) comprises an end (10) with which the stone carrier (3) can be introduced into a bore (5). The second honing stone segment (17) is fastened closer to the end (10) of the stone carrier (3) than the first honing stone segment (16). Moreover, the wear resistance of the second honing stone segment (17) is greater than a wear resistance of the first honing stone segment (16). In this way, a straight bore (5) can be honed even in the case of limited idle travel (9).

Description

BACKGROUND OF THE INVENTION[0001]The invention relates to a honing tool that is suitable in particular for honing blind bores.[0002]In order to hone a through bore, an idle travel is required at the upper and lower end of the bore. The required idle travel generally corresponds approximately to a third or the half of the honing stone length. In the case of a particular application, the actual idle travel is also determined by the shape of the bore. If, for example, the bore is narrower at the upper end than at the lower end, a larger idle travel is then required towards the top. If on the other hand the bore is narrower at the lower end, a larger idle travel is then necessary towards the bottom. By the correct selection of the idle travel, the bore is always kept straight. In the case of a blind bore, the lower idle travel is however severely limited. If the bore is now narrower at the bottom than at the top, the idle travel then cannot be increased towards the bottom for geometric ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B24B33/08
CPCB24B33/083B24B33/086B24B33/084
Inventor STOPP, GUIDO
Owner ROBERT BOSCH GMBH
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