Y-axis parting adaptor for a cutting tool
A cutting tool assembly having a longitudinal axis establishing upward and downward directions, includes a Y-axis parting adaptor mounted onto a holder. The parting adaptor has an insert pocket including a base jaw configured to support a cutting insert. The holder has a holder head portion and a shank portion. The holder head portion has an adaptor pocket in which the parting adaptor is mounted. If the holder shank cross-sectional shape is square or rectangular the forwardmost cutting edge is directly above the forwardmost holder shank surface, and if the holder shank cross-sectional shape is round and a centrally extending holder shank axis extends to the forwardmost cutting edge.
1 . A tool assembly comprising:
a parting adaptor;
a cutting insert; and
a holder;
the parting adaptor comprising:
a cutting portion; and
an adaptor shank portion connected to the cutting portion;
the cutting portion comprising:
opposing first and second sides; and
a peripheral edge connecting the first and second sides;
the peripheral edge comprising:
opposing front and rear sub-edges; and
an upper sub-edge connecting the front and rear sub-edges;
the first and second sides defining a first sideways direction directed from the first side towards the second side and a second sideways direction opposite to the first sideways direction;
a forward direction is defined perpendicular to the first and second sideways directions and directed from the rear sub-edge towards the front sub-edge, and a rearward direction is defined opposite to the forward direction;
an upward direction is defined perpendicular to both the first and second sideways directions and to the forward and rearward directions, and is directed from the adaptor shank portion towards the cutting portion;
a downward direction is defined opposite to the upward direction; the cutting portion further comprises: an insert pocket formed at an intersection of the front and upper sub-edges;
the insert pocket comprises:
a base jaw comprising a forwardmost base jaw surface;
a second jaw at least partially located upward of the base seat jaw; and
a slot end connecting the base jaw and the second jaw;
the adaptor shank portion comprising:
an adaptor clamping arrangement;
the cutting insert is secured to the insert pocket and comprises:
an insert base surface abutting the base jaw;
an upwardly facing rake surface located above the insert base surface;
an insert second surface abutting the second jaw;
a forwardmost clearance surface extending downwardly from the rake surface; and
a forwardmost cutting edge formed at an intersection of the rake surface and the forwardmost clearance surface;
the holder comprising:
a holder head portion; and
a holder shank portion connected to the holder head portion;
the holder head portion comprising:
an adaptor pocket to which the adaptor shank portion is secured;
the holder shank portion comprising:
a holder shank axis extending through the center of the holder shank and extending parallel with the upward and downward directions;
a holder shank cross-sectional shape extending perpendicular to the holder shank axis and being either (a) square or rectangular or (b) round;
a forwardmost holder shank surface; and
an imaginary line extends in the upward direction from the forwardmost holder shank surface; wherein:
the holder shank cross-sectional shape is square or rectangular and the forwardmost cutting edge is directly above the forwardmost holder shank surface; or
the holder shank cross-sectional shape is round and the holder shank axis extends to the forwardmost cutting edge.
2 . The tool assembly according to claim 1 , wherein:
the holder shank cross-sectional shape is square or rectangular and the forwardmost base jaw surface is within a tolerance distance DT of 2 mm from the imaginary line; or
the holder shank cross-sectional shape is round and the forwardmost base jaw surface is within a tolerance distance DT of 2 mm from the holder shank axis.
3 . The tool assembly according to claim 2 , wherein the tolerance distance DT is smaller than 1 mm.
4 . The tool assembly according to claim 3 , wherein the tolerance distance DT is smaller than 0.5 mm.
5 . The tool assembly according to claim 1 , wherein the cutting portion further comprises:
a blade portion thickness measured parallel to the first and second sideways at the insert pocket; and
a blade region defined by having a thickness corresponding to the blade portion thickness, the blade region having:
a maximum height HM measurable parallel to the upward and downward directions and from a lowest blade region point to a highest blade region point;
a maximum width WM measurable parallel to the forward and rearward directions and from a forwardmost blade region point to a rearwardmost blade region point;
wherein: the maximum width WM and the maximum height HM fulfill the condition: WM≥HM.
6 . The tool assembly according to claim 5 , fulfilling the condition: WM≥1.05 HM.
7 . The tool assembly according to claim 6 , fulfilling the condition: WM≥1.10 HM.
8 . The tool assembly according to claim 5 , fulfilling the condition: WM≤1.30 HM.
9 . The tool assembly according to claim 8 , fulfilling the condition: WM≥1.20 HM.
10 . The tool assembly according to claim 1 , further comprising:
a reinforcement region having a reinforcement thickness measured parallel to the blade portion thickness and being larger than the blade portion thickness;
wherein:
the reinforcement region extends in the upward direction a reinforcement portion height HR from the lowest blade region point; and
the reinforcement portion height HR and the maximum height HM fulfills the condition: HR>0.5 HM.
11 . The tool assembly according to claim 10 , fulfilling the condition: HR>0.65 HM.
12 . The tool assembly according to claim 11 , fulfilling the condition: HR>0.75 HM.
13 . The tool assembly according to claim 10 , fulfilling the condition: HR<HM.
14 . The tool assembly according to claim 13 , fulfilling the condition: HR<0.95 HM.
15 . The tool assembly according to claim 1 , wherein the insert pocket's second jaw is located in its entirety rearward of the base jaw.
16 . The tool assembly according to claim 15 , wherein the insert pocket's second jaw and base jaw extend adjacent to each other in a direction parallel to the upward and downward directions.
17 . The tool assembly according to claim 1 , only comprising a single insert pocket.
18 . The tool assembly according to claim 1 , wherein the overall shape of the insert adaptor is elongated when measured parallel to the upward and downward direction.
19 . A tool assembly comprising:
a parting adaptor comprising:
a cutting portion comprising:
opposing first and second sides and a peripheral edge connecting the first and second sides, the peripheral edge comprising opposing front and rear sub-edges and an upper sub-edge connecting the front and rear sub-edges; wherein:
the first and second sides define a first sideways direction directed from the first side towards the second side and a second sideways direction opposite to the first sideways direction;
a forward direction is defined perpendicular to the first and second sideways directions and directed from the rear sub-edge towards the front sub-edge, and a rearward direction is defined opposite to the forward direction;
an upward direction is defined perpendicular to both the first and second sideways directions and to the forward and rearward directions, and is directed from the adaptor shank portion towards the cutting portion; and
a downward direction is defined opposite to the upward direction; and
a single insert pocket formed at an intersection of the front and upper sub-edges, the single insert pocket comprising:
a base jaw comprising a forwardmost base jaw surface;
a second jaw at least partially located upward of the base seat jaw; and
a slot end connecting the base jaw and the second jaw; and
an adaptor shank portion connected to the cutting portion and comprising an adaptor clamping arrangement;
a cutting insert secured to the single insert pocket and comprising:
an insert base surface abutting the base jaw;
an upwardly facing rake surface located above the insert base surface;
an insert second surface abutting the second jaw;
a forwardmost clearance surface extending downwardly from the rake surface; and
a forwardmost cutting edge formed at an intersection of the rake surface and the forwardmost clearance surface; and
a holder comprising:
a holder head portion comprising an adaptor pocket to which the adaptor shank portion is secured; and
a holder shank portion connected to the holder head portion, and comprising:
a holder shank axis extending through the center of the holder shank and extending parallel with the upward and downward directions;
a holder shank cross-sectional shape extending perpendicular to the holder shank axis;
a forwardmost holder shank surface; and
an imaginary line extending in the upward direction from the forwardmost holder shank surface;
wherein:
the holder shank cross-sectional shape is square or rectangular, the forwardmost cutting edge is directly above the forwardmost holder shank surface, and the forwardmost base jaw surface is within a tolerance distance DT of 2 mm from the imaginary line; or
the holder shank cross-sectional shape is round, the holder shank axis extends to the forwardmost cutting edge and the forwardmost base jaw surface is within a tolerance distance DT of 2 mm from the holder shank axis.