Wood-drilling device, wood-drilling system, and method for producing a wood-drilling device
A wood-drilling device includes at least one drill shank, at least one drill tip, and at least one cutting body. The cutting body has at least one cutting wing, wherein at least one of the cutting wings has a cutting surface, which is arranged on a base side facing towards the drill tip. The cutting surface is formed by at least two mutually adjoining cutting partial surfaces which are angled away from a drill plane, oriented perpendicular to the rotation axis, in the direction of the drill shank and which are angled to each other at an angle and each have an angle to the rotation axis different from 0°.
1 . A wood drilling device for drilling a wood material, comprising:
at least one drill shank configured to be clamped on a machine tool,
at least one drill tip having a thread, and
at least one cutting body (i) configured to cut the wood material, (ii) and defining a rotation axis,
wherein the at least one cutting body has at least one cutting wing,
wherein the at least one cutting wing has a cutting surface which is arranged on a base side facing the drill tip,
wherein the base side is arranged in relation to an imaginary cylinder about the rotation axis, and
wherein the cutting surface is formed by at least two cutting partial surfaces bordering one another, angled from a drill plane perpendicular to the rotation axis in the direction of the drill shank, the at least two cutting partial surfaces are angled at an angle to one another and each cutting partial surface has an angle other than 0° to the rotation axis; wherein the at least two cutting partial surfaces are formed as flat surfaces.
2 . A wood-drilling device according to claim 1 , wherein one cutting partial surface of the at least two cutting partial surfaces arranged facing the drill tip has an angle of 5° to the drill plane except for deviations of no more than 2°.
3 . A wood-drilling device according to claim 1 , wherein a cutting partial surface of the at least two cutting partial surfaces that are arranged facing away from the drilling tip has an angle of 45° to the drill plane except for deviations of no more than 5°.
4 . A wood-drilling device according to claim 1 , wherein a cutting partial surface of the at least two cutting partial surfaces that are arranged facing the drill tip has a maximum extension perpendicular to the rotation axis which extends no more than twice as far as a maximum extension perpendicular to the rotation axis of a cutting partial surface of the at least two cutting partial surfaces that are arranged facing away from the drill tip.
5 . A wood-drilling device according to claim 1 , wherein a cutting partial surface of the at least two cutting partial surfaces that are arranged facing the drill tip has a maximum extension perpendicular to the rotation axis which extends at least as far as a maximum extension perpendicular to the rotation axis of a cutting partial surface of the at least two cutting partial surfaces that are arranged facing away from the drill tip.
6 . A wood-drilling device according to claim 1 , wherein the at least one of the cutting wing has at least two radial outer surfaces which are angled with respect to one another over a radial edge, which extends parallel to the rotation axis up to deviations of no more than 15°, and which are arranged at a free end of the respective cutting wing radially facing away at a maximum distance from the rotation axis.
7 . A wood-drilling device according to claim 1 , wherein the wood-drilling device is configured for impact drilling a wood material containing metal fragments.
8 . A wood-drilling device according to claim 7 , wherein the cutting body, on at least one outer side, which is defined in relation to an imaginary cylinder about the rotation axis, has (i) a chipping surface for chip removal from the wood material and/or the metal fragments, and (ii) a chip conveying surface which is adjacent to the chipping surface and which is designed to have a partly concave and partly convex curvature.
9 . A wood-drilling device according to claim 1 , wherein a ratio of the threaded length of the drill tip to the maximum diameter of the drill tip is greater than 2.0.
10 . A wood-drilling device according to claim 1 , wherein the at least one cutting wing includes at least two cutting wings arranged symmetrically in relation to one another in relation to the rotation axis of the cutting body.
11 . A wood-drilling device according to claim 1 , characterized in that the wherein:
the at least one drill shank, the at least one drill tip and the at least one cutting body form a drilling unit which is formed from a material composition,
the at least one drilling unit has at least two distinguishable hardness ranges as measured according to Rockwell,
the at least one drill shank in particular has a shank body with a uniform diameter and a tool connecting body which are directly connected to one another,
the shank body has a hardness limit which divides the shank body into two hardness regions with different hardness levels, and
the hardness boundary is arranged at a distance from the tool connecting body.
12 . A wood-drilling system, comprising: an electric machine tool; and at least one wood-drilling device according to claim 1 .
13 . A method of producing a wood-drilling device according to claim 1 , comprising: forging at least one drilling unit from a drill head blank, and wherein
a maximum diameter of the cutting body, perpendicular to a longitudinal axis of the drill shank, is at least one and a half times the original diameter of the drill head blank as measured perpendicular to a longitudinal axis of the drill head blank, prior to the forging process.