Rotatable cutting tool with a fine-adjustment mechanism for a cutting insert
AssigneeSandvik Antiebolag
InventorsGoran Pantzar, Lars Hellstrom
Life of this patent
Estimating the term…
Abstract
A rotatable cutting tool, e.g., a milling cutter, includes a rotatable base body and a cutting insert, which in addition to two opposite side surfaces has front and rear end surfaces. For axial fine-adjustment of the cutting insert, a set screw is arranged that is located in an area behind the cutting insert and inclined at an obtuse angle to a side surface of the cutting insert. During an unscrewing of the set screw, it presses against the rear end surface of the cutting insert with the purpose of moving the cutting insert in the direction axially forwards, whereby the screw, due to the obtuse angle, is centrifugally secured by means of the actual cutting insert.
Claims8
A rotatable cutting tool comprising:
- a base body forming a seat having a bottom surface and a support surface extending along and adjacent to an edge of the bottom surface,
- a cutting insert supported in the seat, the insert including front and rear end surfaces interconnected by a side surface, the side surface engaging the support surface of the seat,
- a clamp for clamping the insert in the seat, and
- a set screw disposed adjacent the rear end surface of the insert and formed in the base body;
- the set screw including a male thread engaging a female thread of the hole, and a head arranged to push against the rear end surface of the insert as the set screw is unscrewed, the hole arranged such that the head gradually displaces the insert as the set screw is unscrewed.
A method of adjusting a cutting insert on a rotatable tool, the tool comprising a base body forming a seat having a bottom surface and la support surface extending along and adjacent to an edge of the bottom surface, a cutting insert support in the seat, the insert including front and rear end surfaces interconnected by a side surface, the side surface engaging the support surface of the seat, a clamp for clamping the insert in the seat, and a set screw disposed adjacent the rear end surface of the insert and formed in the base body;
- the set screw including a male thread engaging a female thread of the hole, and a head arranged to push against the rear end surface of the insert as the set screw is unscrewed, the method comprising the step of:
- unscrewing the set screw to cause the head to engage and displace the insert by a distance which increases as the set screw is unscrewed.
Dependencies are inferred from the claim text.