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Drilling tool set, drilling tool and indexable drill bit therefor

A drilling tool and drill bit technology, which is applied in the direction of drilling/drilling equipment, drilling tool accessories, tool holder accessories, etc.

Inactive Publication Date: 2009-10-14
SANDVIK INTELLECTUAL PROPERTY AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In four-edged drills, i.e., drills with four similar cutting edges, which allow the four edges on one and the same drill to be switched to the working position, the prior known art also exists where the attached cutting edges have been switched Issues of edge protection for separate, non-working surfaces before reaching the working position

Method used

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  • Drilling tool set, drilling tool and indexable drill bit therefor
  • Drilling tool set, drilling tool and indexable drill bit therefor
  • Drilling tool set, drilling tool and indexable drill bit therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] figure 1 with 2 A tool in the form of a drill 1 is shown in, which includes a base 2 and two drill bits 3 and 4. In this example, the base body 2 is formed by a rear fastening portion 5 and a long narrow rod portion 6 whose basic shape is a cylinder at the front. The length of the rod 6 can vary considerably. For the sake of clarity, the rod is shown in a limited length. Drill bits 3, 4 are arranged from the front end or the top marked 7, and the two debris passages 8, 8'are advantageously spirally extended. Adjacent to the front ends of these debris passages, grooves 9 and 10 are formed for accommodating drill bits 3 and 4. More precisely, a central groove 9 is located near the geometric center axis of the drill for accommodating the drill bit 3 constituting the center drill bit. The peripheral groove 10 is arranged at a greater distance from the central axis of the drill in order to accommodate the drill bit 4 forming the peripheral drill bit.

[0028] in figure 1 with...

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PUM

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Abstract

In a first aspect, the invention relates to a drilling tool set comprising a plurality of drilling tools with a plurality of different working diameters. Each drill of the drill string comprises a base body and two drill bits, namely a central drill bit (3) and a peripheral drill bit (4). They are housed in grooves in the top of the drill. To balance the drill, the difference in radial distance between different pairs of bit flutes on two different bases within a drill string differs from the radial distance between the central axis and peripheral flutes within the same drill string poor distance. In a second aspect, the invention also relates to such a drilling tool. In a third aspect, the invention also relates to a convertible drill for a drilling tool of the type in question.

Description

Technical field [0001] In the first aspect, the present invention relates to a type of drilling tool set, including a set of drilling tools or drills, in order to be able to carry out burst drilling of different diameters, they have different diameters of working drill diameter, drilling tool set A single drilling tool includes on the one hand a base body that rotates around the geometric center axis, and on the other hand two replaceable and convertible drill bits. They exist in the form of a center drill bit and a peripheral drill bit. They can be placed on the front end of the base body. In the groove, to be more precise, a central groove is associated with the central axis, a peripheral groove is associated with the periphery of the base, and for all the different bases included in the tool set, the drilling tool set has Similar center drills and similar peripheral drills, and the different working diameters of drilling tools are affected by the fact that the peripheral groove...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B51/00B23B27/14B23B51/04
CPCB23B27/141B23B2200/125Y10S408/713B23B51/048B23B2200/204B23B2200/201Y10T408/906Y10T408/9097Y10T408/90993Y10T407/23Y10T408/905B23B51/00B23B51/02
Inventor 斯特凡·勒曼
Owner SANDVIK INTELLECTUAL PROPERTY AB