Drill bit and production method
AssigneeHilti Aktiengesellschaft
InventorsKlaus-Peter Bohn, Stefan Grasberger, Werner Kleine
Life of this patent
Estimating the term…
Abstract
A drill bit 1 has a drill head 3 and a shank 4. The shank 4 has a body 20, an add-on part 40 and an internal channel 50. The drill head 3 is attached to the body 20. The add-on part 40 is attached to a lateral surface 21 of the body 20 and arranged completely within a cylindrical envelope 29 that circumscribes the body 20. The internal channel is configured within the add-on part and/or between the add-on part 40 and the lateral surface 21.
Claims26
A drill bit with a drill head and a shank, comprising:
- a body, the drill head attached to the body;
- and
- an add-on part attached to a lateral surface of the body and arranged completely within a cylindrical envelope circumscribing the body, the cylindrical envelope having a radius equal to an outermost radius of the body, the lateral surface including a first flank and a second flank each extending radially to the outermost radius, the first flank and the second flank forming a flute with a width of 10 to 25% of the cylindrical envelope, the add-on part extending laterally between the first and second flanks, the add-on part forming an internal channel, for moving material in a direction away from the drill head, laterally between the first and second flanks configured within the add-on part and/or radially inside of the add-on part between the add-on part and the lateral surface.
A production method for a drill bit, comprising the following steps:
- creating at least one flute in a cylindrical blank to define a body, the flute being oriented along an axis of the blank, the creating the at least one flute including forming first and second flanks of the body each extending radially to an outermost radius of the body, the flute being laterally between the first and second flanks, a width of the flute at the outermost radius of the body being in the range of 10% to 25% of the circumference of the body;
- placing an add-on part into the flute such that the add-on part extends laterally between the first and second flanks, the add-on part forming a channel, for moving material in a direction away from the drill head, running along the flute laterally between the first and second flanks inside the add-on part and/or radially inside of the add-on part between the add-on part and a lateral surface of the body, the add-on part being arranged completely within a cylindrical envelope circumscribing the body;
- and
- arranging a cutting element on a face of the blank.
A drill bit with a drill head and a shank, comprising:
- a body, the drill head attached to the body, the body having a circumference;
- a flute extending in the body, a width of the flute at the circumference being in the range of 10% to 25% of the circumference of the body;
- and
- an add-on part inserted into the flute and attached to a lateral surface of the body and arranged completely within a cylindrical envelope circumscribing the body, an internal channel, for moving material in a direction away from the drill head, being configured within the add-on part and/or between the add-on part and the lateral surface.
Dependencies are inferred from the claim text.