Rotary cutting head having cutting edges extending past key actuating portion
AssigneeIscar, Ltd.
InventorHanoch Guy
Life of this patent
Estimating the term…
Abstract
A replaceable milling head rotatable in a cutting direction about a longitudinal central axis, the central axis defining a forward direction and an opposite rearward direction, has a forward cutting portion and a rear threaded coupling portion for coupling to a shank. The cutting portion includes two or more key actuating portions which assist in mounting the milling head onto the shank. The cutting portion includes a plurality of helical chip flutes alternating with cutting edges. At least one or more of the cutting edges and flutes extend axially rearward of at least a portion of the key actuating portions.
Claims19
A replaceable milling head (10) rotatable in a cutting direction (RD) about a longitudinal central axis (S) defining a forward direction (F) and an opposite rearward direction (R), the milling head (10) comprising:
- a cutting portion (20), comprising:
- an abutment surface (22), facing in the rearward direction (R) and extending annularly about the central axis (S);
- a peripheral surface (24) extending forward (F) from the abutment surface (22);
- a plurality of chip removal flutes (26) extending along the peripheral surface (24);
- a plurality of cutting edges (28), each extending along a respective chip removal flute (26);
- and
- a first and second key actuating portions (32a, 32c) formed on radially opposite sides of the peripheral surface (24), each of the first and second key actuating portions (32a, 32c) comprising:
- a rearward-facing top shoulder (34a, 34c);
- a forward-facing bottom shoulder (36a, 36c) located rearward of the top shoulder (34a, 34c);
- and
- a bracing surface (38a, 38c) extending between the top shoulder (34a, 34c) to the bottom shoulder (36a, 36c);
- and
- a threaded coupling portion (40), extending rearward (R) of the abutment surface (22);
- wherein:
- at least one cutting edge (28) has an active rear cutting edge portion (30) located axially rearward of at least one of the top shoulders (34a, 34c);
- and
- at least one of the chip removal flutes (26) intersects at least one of the bottom shoulders (36a, 36c).
A replaceable milling head (10) rotatable in a cutting direction (RD) about a longitudinal central axis (S) defining a forward direction (F) and an opposite rearward direction (R), the milling head (10) comprising:
- a cutting portion (20), comprising:
- an abutment surface (22), facing in the rearward direction (R) and extending annularly about the central axis (S);
- a peripheral surface (24) extending forward (F) from the abutment surface (22);
- a plurality of chip removal flutes (26) extending along the peripheral surface (24);
- a plurality of cutting edges (28), each extending along a respective chip removal flute (26);
- and
- a first and second key actuating portions (32a, 32c) formed on radially opposite sides of the peripheral surface (24), each of the first and second key actuating portions (32a, 32c) comprising:
- a rearward-facing top shoulder (34a, 34c);
- a forward-facing bottom shoulder (36a, 36c) located rearward of the top shoulder (34a, 34c);
- and
- a bracing surface (38a, 38c) extending between the top shoulder (34a, 34c) to the bottom shoulder (36a, 36c);
- and
- a threaded coupling portion (40), extending rearward (R) of the abutment surface (22);
- wherein:
- at least one cutting edge (28) has an active rear cutting edge portion (30) located axially rearward of at least one of the top shoulders (34a, 34c);
- and
- the at least one active rear cutting edge portion (30) extends axially rearward of at least one of the bottom shoulders (36a, 36c).
A replaceable milling head (10) rotatable in a cutting direction (RD) about a longitudinal central axis (S) defining a forward direction (F) and an opposite rearward direction (R), the milling head (10) comprising:
- a cutting portion (20), comprising:
- an abutment surface (22), facing in the rearward direction (R) and extending annularly about the central axis (S);
- a peripheral surface (24) extending forward (F) from the abutment surface (22);
- a plurality of chip removal flutes (26) extending along the peripheral surface (24);
- a plurality of cutting edges (28), each extending along a respective chip removal flute (26);
- and
- a first and second key actuating portions (32a, 32c) formed on radially opposite sides of the peripheral surface (24), each of the first and second key actuating portions (32a, 32c) comprising:
- a rearward-facing top shoulder (34a, 34c);
- a forward-facing bottom shoulder (36a, 36c) located rearward of the top shoulder (34a, 34c);
- and
- a bracing surface (38a, 38c) extending between the top shoulder (34a, 34c) to the bottom shoulder (36a, 36c);
- and
- a threaded coupling portion (40), extending rearward (R) of the abutment surface (22);
- wherein:
- at least one cutting edge (28) has an active rear cutting edge portion (30) located axially rearward of at least one of the top shoulders (34a, 34c);
- the number of chip removal flutes (26) is four, and the number of cutting edges (28) is four;
- and
- all four chip removal flutes (26) intersect the abutment surface (22).
Dependencies are inferred from the claim text.