Honing tool for honing blind bores

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...

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