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Honing tool for honing blind bores

A honing and tool technology, applied in the field of honing blind drilling, can solve the problems of frequent disassembly of honing tools, and achieve the effect of improving the drilling geometry and high durability

Inactive Publication Date: 2013-03-20
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The honing tool must therefore be disassembled relatively frequently

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

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] figure 1 A honing tool 1 and a workpiece 2 according to a first exemplary embodiment of the invention are shown schematically.

[0021] The honing tool 1 has a bar holder 3 ( figure 2 ), a honing tool body 3' and a cylindrical section 4 at which the honing tool 1 can be clamped in a chuck of a machine. For the sake of illustration, the honing tool 1 is inserted into a borehole 5 , which is designed as a blind borehole 5 . The blind bore 5 here has a widened section 7 at a lower end 6 . Furthermore, a borehole 8 with a reduced diameter is provided, which opens into the widened section 7 .

[0022] The widened section 7 predetermines a limited overrun 9 for machining the bore 5 with the honing tool 1 . The limited overtravel 9 is here limited by the stop of the lower end 10 of the honing tool body 3' on the lower end 6 of the widened section 7.

[0023] The honing tool 1 has a longitudinal axis 15 . The honing tool 1 is moved in the direction of the longitudinal ax...

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PUM

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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

technical field [0001] The invention relates to a honing tool which is especially suitable for honing blind drilled holes. Background technique [0002] To hon a blind hole, overtravel is required at the upper and lower hole ends. The required overtravel is usually approximately one-third or one-half the length of the honing stone. In the specific application case, the actual overtravel is also determined by the borehole shape. If, for example, the upper end of the borehole is narrower than the lower end, a greater overtravel is required upwards. If, on the other hand, the lower part of the borehole is narrow, a greater overtravel is also required downwards. This is achieved through correct selection of the overtravel, and the borehole remains always straight. But overtravel is very limited when drilling blind. If the borehole is now narrower in the lower part than in the upper part, the overtravel may not be increased downwards for geometrical reasons. The honing tool...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B33/08
CPCB24B33/083B24B33/084B24B33/086
Inventor G·施托普
Owner ROBERT BOSCH GMBH
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