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Drilling tool, drilling tool set comprising same and drilling device

A drilling tool and drilling device technology, which is applied in drilling/drilling equipment, transportation and packaging, tool and workpiece connection, etc., can solve the problem of low drill bit life and achieve a good sealing effect

Inactive Publication Date: 2009-06-24
KENNAMETAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although tools are generally regrindable, the life of a solid drill is much lower than that of a drill with one or more replaceable bits

Method used

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  • Drilling tool, drilling tool set comprising same and drilling device
  • Drilling tool, drilling tool set comprising same and drilling device
  • Drilling tool, drilling tool set comprising same and drilling device

Examples

Experimental program
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Effect test

Embodiment Construction

[0030] Figure 1a , 1b to 3a, 3b each show an embodiment of a drilling tool 1 with two drill tips 2 and 3 . Each drilling tool 1 is constructed in one piece and has an area A adjoining the first drill tip 2 , an adjoining middle area B and a rear area C adjoining the second drill tip 3 . In the illustrated embodiment, the reduced diameter D2 in the intermediate region B is smaller than the tool diameter D1. Thus, especially in Figure 2a , In a particularly preferred embodiment shown in 2b, a group of tools having different tool diameters D1, which are always determined by the outer regions A and C of the drilling tool 1, have the same reduced diameter D2. In this way, all tools of the set can be fitted with the same fixture. The cutting edges of each drilling tool 1 are designated with reference numerals 4 , 5 , 6 , 7 , and the associated chip flutes are designated with reference numerals 8 , 9 . in accordance with Figure 1a , In the embodiments of 1b and 2a, 2b, four gui...

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PUM

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Abstract

Disclosed is a drilling tool comprising a first drill bit (2) that is provided with at least two forward cutting edges (4, 5) and a second drill bit (3) which encompasses at least two rear cutting edges (6, 7). A cutting groove (8, 9) runs continuously from one respective forward cutting edge (4, 5) to a rear cutting edge (6, 7). Said cutting groove (8, 9) is embodied in an asymmetric manner in an area (A) bordering the forward drill bit (2), in a symmetric manner in a central area (B), and asymmetric in an area (C) bordering the rear drill bit (3).

Description

technical field [0001] The invention relates to a drilling tool having two drill points arranged at opposite ends thereof. The drilling tool mentioned here refers to a drill bit used to process a fixed-diameter hole, and may also be a step drill bit or a counterbore drill bit, for example. The invention also relates to a drilling tool set comprising a plurality of such drilling tools and a drilling device comprising a jig and such a drilling tool. Background technique [0002] A drilling tool of this type is known, for example, from DE 1 752 616 A1. The double-ended drilling tool is made from an extruded profile which is divided into individual segments. Due to the extrusion process, the chip flutes of the drilling tool have a shape that is constant over their length. [0003] Drilling tools, especially for metal working, usually have at least one exchangeable bit. Thus, when the service life of the cutter head is over, the base body which holds the cutter head can still...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B51/02B23B51/06B23B51/12
CPCB23B51/12B23B2260/126B23B2251/406B23B51/02B23B2251/02Y10T408/9097B23B2226/61B23B51/06B23B2251/247Y10T408/909B23B2240/08
Inventor U·克伦策H·考佩
Owner KENNAMETAL INC
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