Hollow drill and a production process for the same
AssigneeHilti Aktiengesellschaft
InventorsKlaus-Peter Bohn, Zsolt Kosa, Roland Foser
Life of this patent
Estimating the term…
Abstract
A production process is provided for a drill including the following steps. From a rod-shaped blank comprising an end section, a central section, and a hollow space extending at least through the end section and the central section along an axis of the blank, the end section is formed in a direction extending radially relative to the axis, the diameter of the hollow space in the end section being reduced. Either a cutting element is attached to the end section or grooves are introduced into the end section for forming a shank.
Claims12
A method for producing a drill, the method comprising:
- providing a rod-shaped blank having a first end section and a second end section, a central section disposed between the first and second end sections, and a hollow space, the hollow space extending at least through the central section and one of the first and second end sections along an axis of the rod-shaped blank, processing the rod-shaped blank so that the first end section has an enlarged outer diameter relative to the outer diameter of the central;
- forming the enlarged first end section in a direction extending radially relative to the axis of the rod-shaped blank, wherein a diameter of the hollow space in the first end section is reduced;
- and
- attaching a cutting element to the first end section.
A method for producing a drill, the method comprising:
- providing a rod-shaped blank having a first end section and a second end section, a central section disposed between the first and second end sections, and a hollow space, the hollow space extending at least through the central section and one of the first and second end sections along an axis of the rod-shaped blank:
- compressing the blank along the axis, whereby the outer diameter of the first end section is increased relative to the outer diameter of the central section;
- forming the first end section in a direction extending radially relative to the axis of the rod-shaped blank, wherein a diameter of the hollow space in the first end section is reduced;
- and
- attaching a cutting element to the first end section.
A method for producing a drill, the method comprising:
- providing a rod-shaped blank having a first end section, a second end section, a central section disposed between the first and second end sections;
- processing the blank so that at least one of the first and second end sections has an enlarged diameter relative to the central section;
- providing a hollow space in the blank, the hollow space extending along an axis of the blank at least through the central section and the enlarged diameter end section;
- and
- forming the enlarged diameter end section in a direction extending radially relative to the axis of the rod-shaped blank, wherein a diameter of the hollow space in the enlarged diameter end section is reduced.
Dependencies are inferred from the claim text.