Blank and tool with cooling channels
AssigneeGuehring Ohg
InventorsManfred Schwenck, Armin Helbig
Life of this patent
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Abstract
The application comprises a blank for producing a cutting tool with at least one inner bore for conducting fluids, wherein the blank comprises at least a first and a second portion along, its longitudinal axis, wherein the inner bore in the first portion is formed substantially in a straight line and parallel to the longitudinal axis of the blank, and the inner bore in the second portion has a first twist with a first twist angle greater than zero, wherein the blank can be obtained by a continuous pressing operation, in particular a continuous extruding operation. The application also describes an extrusion device for producing a blank, wherein the extrusion device comprises a control element for controlling the twist angle, in particular the first and/or second twist angle.
Claims16
A blank for producing a cutting tool, the blank comprising:
- at least two inner bores for conducting fluids;
- a substantially continuous outer diameter;
- and
- at least a first portion, a second portion, and a third portion along a longitudinal axis of the blank,
- the inner bores in the first portion each being formed substantially rectilinear and parallel to the longitudinal axis of the blank,
- the inner bores in the second portion each having a first twist with a first twist angle greater than zero, and
- the first twist angle of at least one of the inner bores differing from the first twist angle of at least one other of the inner bores,
- the blank obtained by a continuous pressing operation wherein the third portion is between the first portion and the second portion,
- wherein in the third portion each inner bore:
- adjacent to the first portion has no twist, and
- adjacent to the second portion has a second twist with a second twist angle, wherein the second twist angle and the first twist angle are the same, wherein in the third portion the inner bore has a twist with a twist angle which changes continuously along the longitudinal axis of the blank.
Dependencies are inferred from the claim text.