ROTARY CUTTING TOOL HAVING AXIALLY SUPPORTED LEAD CUTTING INSERT AND A CONTINUOUS CUTTING EDGE
A rotary cutting tool has a cutting body and a plurality of cutting inserts, including a first insert removably secured in a first pocket and a second insert removably secured in a second pocket. The first pocket opens out at a forward end surface of the cutting body, having a seat surface with an axial support wall transverse thereto, and the second pocket is located axially rearward of the first pocket. The first insert has opposing front and back end surfaces, with a peripheral side surface extending therebetween which is in contact with the seat surface and the axial support wall. A first major cutting edge of the first insert axially overlaps with a second major cutting edge of the second insert, and in a side view of the cutting tool, a raised shoulder surface adjacent the axial support wall is at least partially obscured by the second insert.
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The present invention relates to a rotary cutting tool with a plurality of cutting inserts providing a continuous effective cutting edge along a single chip flute, for use in metal cutting processes in general, and for milling operations in particular.
BACKGROUND OF THE INVENTIONWithin the field of rotary cutting tools used in milling operations, there are many examples of a plurality of cutting inserts arranged along a single chip flute to provide a continuous effective cutting edge.
U.S. Pat. No. 4,790,693 discloses a milling tool with a plurality of identical indexable side station inserts in an inter-fitting arrangement along a single chip gullet, and a single non-indexable end (“first” or “lead”) station insert having a cutting edge which axially overlaps with the operative cutting edge of the adjacent side station insert.
U.S. Pat. No. 8,696,257 discloses a milling tool with a plurality of identical side and end station inserts arranged along a single chip removing flute, each insert indexable about a center line extending through its rake surface and V-shaped seating surface.
It is an object of the present invention to provide an improved milling tool.
It is also an object of the present invention to provide an improved milling tool having a plurality of indexable cutting inserts arranged along a single chip flute.
It is a further object of the present invention to provide an improved milling tool in which the end station insert is removably secured in an end station pocket with a high level of stability.
SUMMARY OF THE INVENTIONIn accordance with the present invention, there is provided a cutting tool rotatable about a tool axis defining a forward-rearward direction and having a direction of rotation, the cutting tool comprising:
a cutting body having;
-
- a forward end surface;
- a first insert receiving pocket opening out at the forward end surface and having a first insert seat surface with a first insert axial support wall transverse thereto,
- a second insert receiving pocket located axially rearward of the first insert receiving pocket and having a second insert seat surface; and
- a raised shoulder surface adjacent the first insert axial support wall;
- a first cutting insert removably secured in a first insert receiving pocket, the first cutting insert having opposing first insert front and back end surfaces with a first insert peripheral side surface extending therebetween and a first insert axis extending therethrough, and at least one first insert front major cutting edge formed at the intersection of the first insert front end surface and the first insert peripheral side surface,
- a second cutting insert removably secured in a second insert receiving pocket the second cutting insert having opposing second insert front and back end surfaces with a second insert peripheral side surface extending therebetween and a second insert axis extending therethrough, and at least one second insert front major cutting edge formed at the intersection of the second insert front end surface and the second insert peripheral side surface,
wherein:
the first insert seat surface contacts a first portion of the first insert peripheral side surface,
the first insert axial support wall contacts a second portion of the first insert peripheral side surface,
one of the at least one first insert front major cutting edge is operative and one of the at least one second insert front major cutting edge is operative,
a second tool plane perpendicular to the tool axis intersects the operative first insert front major cutting edge and the operative second insert front major cutting edge, and
in a side view of the cutting tool perpendicular to the tool axis, the raised shoulder surface is at least partially obscured by the second cutting insert.
For a better understanding, the invention will now be described, by way of example only, with reference to the accompanying drawings in which chain-dash lines represent cut-off boundaries for partial views of a member and in which:
As shown in
As shown in
In some embodiments of the present invention, the first and second cutting inserts 24, 26 may preferably be manufactured by form pressing and sintering a cemented carbide, such as tungsten carbide, and may be coated or uncoated.
Also in some embodiments of the present invention, the first and second cutting inserts 24, 26 may be different from each other.
As shown in
In some embodiments of the present invention, a helical chip flute 34 may extend axially rearwardly from the forward end surface 32 of the cutting body 22, and the first and second insert receiving pockets 28, 30 may communicate with the helical chip flute 34.
Also in some embodiments of the present invention, as shown in
It should be appreciated that configuring the first tool plane PT1 to intersect the first and second cutting inserts 24, 26 such that the first and second cutting inserts 24, 26 circumferentially overlap, advantageously enables the helix angle of the chip flute 34 to be minimized and thus the total number of chip flutes 34 formed in the cutting body 22 to be maximized.
As shown in
In some embodiments of the present invention, the first cutting insert 24 may exhibit rotational symmetry about the first insert axis A1.
As shown in
In some embodiments of the present invention, two first insert front major cutting edges 42 may be formed at the intersection of the first insert front end surface 36 and the first insert peripheral side surface 40, and the two first insert front major cutting edges 42 may be spaced apart by two first insert front minor cutting edges 44.
Also in some embodiments of the present invention, the first insert front and back end surfaces 36, 38 may be non-identical.
Further in some embodiments of the present invention, no cutting edges may be formed at the intersection of the first insert back end surface 38 and the first insert peripheral side surface 40.
As shown in
In some embodiments of the present invention, the second cutting insert 26 may exhibit rotational symmetry about the second insert axis A2.
As shown in
In some embodiments of the present invention, two spaced apart second insert front major cutting edges 52 may be formed at the intersection of the second insert front end surface 46 and the second insert peripheral side surface 50.
Also in some embodiments of the present invention, the second insert front and back end surfaces 46, 48 may be identical, and at least one second insert back major cutting edge 54 may be formed at the intersection of the second insert back end surface 46 and the second insert peripheral side surface 50.
As shown in
In some embodiments of the present invention, the first insert seat surface 56 may be planar.
Also in some embodiments of the present invention, the first insert seat surface 56 may be contiguous with the forward end surface 32 of the cutting body 22.
As shown in
It should be appreciated that
In some embodiments of the present invention, the first insert axial support wall 58 may be spaced apart from the first insert seat surface 56 by a first insert axial stress relief groove 60.
Also in some embodiments of the present invention, the first insert axial support wall 58 may be planar.
Further in some embodiments of the present invention, the first insert peripheral side surface 40 may be in contact with the entire first insert axial support wall 58.
As shown in
In some embodiments of the present invention, as shown in
Also in some embodiments of the present invention, the second insert seat surface 62 may be planar.
Further in some embodiments of the present invention, as shown in
It should be appreciated that configuring the second insert seat surface 62 to be located radially outward of the first insert seat surface 56 enables the formation of the first insert axial support wall 58.
Yet further in some embodiments of the present invention, the second insert tangential support wall 64 may be in contact with the second insert back end surface 48, providing tangential support for the second cutting insert 26, and the second insert front end surface 46 may be located rotationally forward of the second insert back end surface 48.
As shown in
In some embodiments of the present invention, as shown in
Also in some embodiments of the present invention, one of the two first insert minor side surfaces 68a, 68b may be in contact with the entire first insert axial support wall 58.
Further in some embodiments of the present invention, each of the two first insert major side surfaces 66a, 66b and each of the two first insert minor side surfaces 68a, 68b may be contiguous with the first insert back end surface 38.
As shown in
In some embodiments of the present invention, the first insert minimum length L1MIN may be greater than the first insert maximum width W1MAX.
Also in some embodiments of the present invention, each of the at least one first insert front major cutting edge 42 may be formed at the intersection of the first insert front end surface 36 and one of the two first insert major side surfaces 66a, 66b.
Further in some embodiments of the present invention, each of the two first insert front minor cutting edges 44 may be formed at the intersection of the first insert front end surface 36 and one of the two first minor side surfaces 68a, 68b.
As shown in
In some embodiments of the present invention, the first insert through bore 70 may extend along a first insert bore axis AB1, and the first insert maximum width W1MAX may be measured parallel to the first insert bore axis AB1.
Also in some embodiments of the present invention, a first insert bore plane PB1 may contain the first insert bore axis AB1 and the first insert axis A1, and the first insert minimum length L1MIN may be measured perpendicular to the first insert bore plane PB1.
As shown in
As shown in
In some embodiments of the present invention, as shown in
As shown in
In some embodiments of the present invention, the second insert minimum length L2MIN may be greater than the second insert maximum width W2MAX.
Also in some embodiments of the present invention, the first insert maximum width W1MAX may be greater than the second insert maximum width W2MAX.
Further in some embodiments of the present invention, the first insert maximum width W1MAX may be at least six-fifths of the second insert maximum width W2MAX.
It should be appreciated that configuring the first insert maximum width W1MAX to be greater than the second insert maximum width W2MAX enables stable mounting of the first and second cutting inserts 24, 26 in their respective first and second insert receiving pockets 28, 30, whilst arranging the operative first and second insert front major cutting edges 42, 52 to perform machining operations at the same cutting diameter.
As shown in
In some embodiments of the present invention, the second insert through bore 80 may extend along a second insert bore axis AB2, and the second insert maximum width W2MAX may be measured parallel to the second insert bore axis AB2.
Also in some embodiments of the present invention, a second insert bore plane PB2 may contain the second insert bore axis AB2 and the second insert axis A2, and the second insert minimum length L2MIN may be measured perpendicular to the second insert bore plane PB2.
Further in some embodiments of the present invention, the second cutting insert 26 may exhibit rotational symmetry about the second insert bore axis AB2.
As shown in
As shown in
In some embodiments of the present invention, the second tool plane PT2 may intersect each of the least one first insert front major cutting edge 42 and each of the least one second insert front major cutting edge 52.
For embodiments of the present invention in which the second insert front and back end surfaces 46, 48 are identical, the second tool plane PT2 may also intersect each of the least one second insert back major cutting edge 54.
As shown in
It should be appreciated that configuring the second tool plane PT2 to intersect the operative first insert and operative second insert front major cutting edges 42, 52 advantageously enables the provision of a continuous cutting edge along the chip flute 34.
As shown in
It should be appreciated that configuring the raised shoulder surface 84 to be at least partially obscured by the second cutting insert 26 advantageously enables the first and second cutting inserts 24, 26 to be arranged in close axial proximity, whilst the first insert axial support wall 58 provides axial support for the first cutting insert 24.
It should also be appreciated that the provision of axial support for the first cutting insert 24 is an important requirement, as the first insert receiving pocket 28 opens out at the forward end surface 32 of the cutting body 22, and the first cutting insert 24 is subjected to substantial axial cutting forces during machining operations.
As shown in
In some embodiments of the present invention, the shoulder surface 84 may be located radially outward of the first insert seat surface 56.
Also in some embodiments of the present invention, as shown in
Further in some embodiments of the present invention, the shoulder surface 84 may be contiguous with the first insert axial support wall 58.
As shown in
In some embodiments of the present invention, the shoulder surface 84 may form a portion of the second insert seat surface 62.
It should be appreciated that for embodiments of the present invention that the second insert seat surface 62 is planar, the shoulder surface 84 may be a coplanar extension thereof.
In some embodiments of the present invention, as shown in
In other embodiments of the present invention (not shown), the shoulder surface 84 may be distinct from the second insert seat surface 62, for example, offset therefrom or inclined thereto, such that neither of the two second insert major side surfaces 76a, 76b are in contact with the shoulder surface 84.
As shown in
In some embodiments of the present invention, the first tool plane PT1 may intersect the first insert axial support wall 58.
As shown in
In some embodiments of the present invention, the first pocket angle α1 may have a range from 70 to 110 degrees.
It should also be appreciated that use of the terms “internal angle” and “external angle” throughout the description and claims refers to an angle between two surface components of a pair of surfaces as measured internal and external to the member on which the two surface components are formed, respectively.
As shown in
In some embodiments of the present invention, as shown in
Also in some embodiments of the present invention, the first insert median plane M may intersect the shoulder surface 84.
It should be appreciated that although
It should be appreciated that for embodiments of the present invention in which the first insert peripheral side surface 40 is in contact with the entire first insert axial support wall 58, configuring the first insert median plane M to intersect the first insert axial support wall 58 and the second cutting insert 26, advantageously enables the helix angle of the chip flute 34 to be minimized whilst providing central and stable axial support for the first cutting insert 24.
As shown in
In some embodiments of the present invention, as shown in
Also in some embodiments of the present invention, the first insert tangential support wall 86 may be contiguous with the forward end surface 32 of the cutting body 22.
Further in some embodiments of the present invention, the first insert tangential support wall 86 may be planar.
As shown in
In some embodiments of the present invention, the second pocket angle α2 may have a range from 75 to 88 degrees.
It should be appreciated that with respect to the first insert receiving pocket 28,
It should also be appreciated that configuring the first insert axial and first insert tangential support walls 58, 86 to form an external acute second pocket angle α2 results in tangential cutting forces acting on the first insert tangential support wall 86 being partially directed towards the first insert axial support wall 58, and axial cutting forces acting on the first insert axial support wall 58 being partially directed towards the first insert tangential support wall 86, which advantageously results in a stable clamping arrangement and reduced axial and tangential cutting forces acting on the first clamping screw 72 during machining operations.
As shown in
Yet further in some embodiments of the present invention, the first insert tangential support wall 86 may be spaced apart from the first insert seat surface 56 by a first insert tangential stress relief groove 88.
As shown in
In some embodiments of the present invention, the third pocket angle α3 may have a range from 65 to 85 degrees.
Also in some embodiments of the present invention, the third tool plane PT3 may intersect each of the at least one first insert front major cutting edge 42.
It should be appreciated that configuring the first insert seat surface 56 and the first insert tangential support wall 86 to form an external acute third pocket angle α3 results in tangential cutting forces acting on the first insert tangential support wall 86 being partially directed towards the first insert seat surface 56, which advantageously results in a stable clamping arrangement and reduced tangential cutting forces acting on the first clamping screw 72 during machining operations.
As shown in
It should be appreciated that configuring the first head portion 90 to be entirely located radially outward of the shoulder surface 84 results in clamping contact between the first head portion 90 and the first through bore 70 radially outward of the first insert axial support wall 58.
As shown in
Also in some embodiments of the present invention, the tangential end wall 94 may be contiguous with the first insert axial support wall 58.
As seen in
To provide an adequate surface area for axial support of the first cutting insert 24, the minimum height HAMIN of the first insert axial support wall 58 is preferably no less than 15% of the first insert maximum width W1MAX.
Further in some embodiments of the present invention, the tangential end wall 94 may not make contact with the first cutting insert 24.
As shown in
It should be appreciated that for embodiments of the present invention that the shoulder surface 84 is located radially outward of the first insert seat surface 56, the shoulder surface 84 may also be located radially inward of the outer peripheral surface 96.
In some embodiments of the present invention, as shown in
Also in some embodiments of the present invention, the pair of first insert back abutment surfaces 98a, 98b may be spaced apart by an intermediate surface 100.
It should be appreciated that apart from only one of the two first insert back abutment surfaces 98a, 98b being in contact with the first insert tangential support wall 86, no other portion of the first insert back end surface 38 is in contact with the first insert receiving pocket 28.
It should also be appreciated that configuring the radially outermost portion of the first insert tangential support wall 86 to be in contact with the first insert back end surface 38 results in tangential support for the first cutting insert 24 being provided radially outward of the region of clamping contact between the first head portion 90 and the first insert through bore 70, which advantageously results in a stable clamping arrangement and reduced tangential cutting forces acting on the first clamping screw 72 during machining operations.
As shown in
In some embodiments of the present invention, in the cross-section taken in the first insert major plane PM1, the pair of first insert back abutment surfaces 98a, 98b may form an internal obtuse first insert angle γ1.
Also in some embodiments of the present invention, the first insert major plane PM1 may intersect each of the at least one first insert front major cutting edge 42.
Further in some embodiments of the present invention, the first insert angle γ1 may have a range from 130 to 170 degrees.
It should be appreciated that the first insert angle γ1 may be approximately twice the third pocket angle α3, to ensure adequate contact between one of the two first insert back abutment surfaces 98a, 98b and the first insert tangential support wall 86 in each index position of the first cutting insert 24.
In some embodiments of the present invention, the first insert major plane PM1 and the first insert bore plane PB1 may be coplanar.
Also in some embodiments of the present invention, as shown in
It should be appreciated that although
As shown in
For embodiments of the present invention in which the second insert front and back end surfaces 46, 48 are identical and the second insert front end surface 46 is in contact with the second insert tangential support wall 64 (not shown), the operative second insert back major cutting edge 54 may have a positive second insert axial rake angle β2.
Although the present invention has been described to a certain degree of particularity, it should be understood that various alterations and modifications could be made without departing from the spirit or scope of the invention as hereinafter claimed.
Claims
1. A cutting tool (20) rotatable about a tool axis (AT) defining a forward-rearward direction (DF, DR) and having a direction of rotation (R), the cutting tool (20) comprising:
- a cutting body (22) having: a forward end surface (32); a first insert receiving pocket (28) opening out to the forward end surface (32) and having a first insert seat surface (56) with a first insert axial support wall (58) transverse thereto; a second insert receiving pocket (30) located axially rearward of the first insert receiving pocket (28) and having a second insert seat surface (62); and a raised shoulder surface (84) adjacent the first insert axial support wall (58);
- a first cutting insert (24) removably secured in the first insert receiving pocket (28), the first cutting insert (24) having opposing first insert front and back end surfaces (36, 38) with a first insert peripheral side surface (40) extending therebetween and a first insert axis (A1) extending therethrough, and at least one first insert front major cutting edge (42) formed at the intersection of the first insert front end surface (36) and the first insert peripheral side surface (40), and
- a second cutting insert (26) removably secured in the second insert receiving pocket (30), the second cutting insert (26) having opposing second insert front and back end surfaces (46, 48) with a second insert peripheral side surface (50) extending therebetween and a second insert axis (A2) extending therethrough, and at least one second insert front major cutting edge (52) formed at the intersection of the second insert front end surface (46) and the second insert peripheral side surface (50),
- wherein:
- the first insert seat surface (56) contacts a first portion of the first insert peripheral side surface (40),
- the first insert axial support wall (58) contacts a second portion of the first insert peripheral side surface (40),
- one of the at least one first insert front major cutting edge (42) is operative and one of the at least one second insert front major cutting edge (52) is operative,
- a second tool plane (PT2) perpendicular to the tool axis (AT) intersects the operative first insert front major cutting edge (42) and the operative second insert front major cutting edge (52), and
- in a side view of the cutting tool (20) perpendicular to the tool axis (AT), the raised shoulder surface (84) is at least partially obscured by the second cutting insert (26).
2. The cutting tool (20) according to claim 1, wherein:
- the first insert receiving pocket (28) includes a first insert tangential support wall (86) transverse to the first insert seat surface (56), and
- the first insert tangential support wall (86) contacts the first insert back end surface (38).
3. The cutting tool (20) according to claim 2, wherein:
- in a side view of the cutting body (22), the first insert axial and first insert tangential support walls (58, 86) form an external acute second pocket angle (α2).
4. The cutting tool (20) according to claim 2, wherein in a cross-section taken in a third tool plane (PT3) perpendicular to the tool axis (AT) and intersecting the first insert seat surface (56) and the first insert tangential support wall (86), the first insert seat surface (56) and the first insert tangential support wall (86) form an external acute third pocket angle (α3).
5. The cutting tool (20) according to claim 2, wherein:
- the first insert tangential support wall (86) faces the direction of rotation (R).
6. The cutting tool (20) according to claim 5, wherein:
- a tangential end wall (94) contiguous with the shoulder surface (84) faces the direction of rotation (R), and
- the tangential end wall (94) is located rotationally forward of the first insert tangential support wall (86).
7. The cutting tool (20) according to claim 2, wherein:
- the cutting body (22) has a cylindrical outer peripheral surface (96) extending axially rearwardly from the forward end surface (32), and
- the first insert tangential support wall (86) intersects the outer peripheral surface (96).
8. The cutting tool (20) according to claim 7, wherein:
- the first insert back end surface (38) has a pair of first back abutment surfaces (98a, 98b), and
- only one of the two first back abutment surfaces (98a, 98b) is in contact with the first insert tangential support wall (86), with contact occurring at the radially outermost portion of the first insert tangential support wall (86).
9. The cutting tool (20) according to claim 8, wherein in a cross-section taken in a first insert major plane (PM1) containing the first insert axis (A1), the first insert back end surface (38) has a convex shape.
10. The cutting tool (20) according to claim 9, wherein in the cross-section taken in the first insert major plane (PM1), the pair of first insert back abutment surfaces (98a, 98b) form an internal obtuse first insert angle (α1).
11. The cutting tool (20) according to claim 1, wherein:
- the first insert peripheral side surface (40) includes two opposing first insert major side surfaces (66a, 66b) and two opposing first minor side surfaces (68a, 68b),
- one of the two first insert major side surfaces (66a, 66b) is in contact with the first insert seat surface (56), and
- one of the two first insert minor side surfaces (68a, 68b) is in contact with the first insert axial support wall (58).
12. The cutting tool (20) according to claim 11, wherein:
- the first cutting insert (24) has a first insert minimum length (L1MIN) measured as the shortest distance between the two first minor side surfaces (68a, 68b), and a first insert maximum width (W1MAX) between the two first insert major side surfaces (66a, 66b) measured perpendicular to the first insert axis (A1) and the first insert minimum length (W1MIN), and
- the first insert minimum length (L1MIN) is greater than the first insert maximum width (W1MAX).
13. The cutting tool (20) according to claim 12, wherein a first insert through bore (70) extends between and opens out to the two first insert major side surfaces (66a, 66b).
14. The cutting tool (20) according to claim 13, wherein a first clamping screw (72) extends through the first insert through bore (70) and threadingly engages a first screw bore (74) in the first insert seat surface (56).
15. The cutting tool (20) according to claim 14, wherein:
- the first clamping screw (72) has a first head portion (90) and a first shank portion (92) extending therefrom, and
- the first head portion (90) is entirely located radially outward of the shoulder surface (84).
16. The cutting tool (20) according to claim 12, wherein:
- the second insert peripheral side surface (50) includes two opposing second insert major side surfaces (76a, 76b) and two opposing second insert minor side surfaces (78a, 78b), and
- one of the two second insert major side surfaces (76a, 76b) is in contact with the shoulder surface (84).
17. The cutting tool (20) according to claim 16, wherein:
- the second cutting insert (26) has a second insert minimum length (L2MIN) measured as the shortest distance between the two second minor side surfaces (78a, 78b), and a second insert maximum width (W2MAX) between the two second insert major side surfaces (76a, 76b) measured perpendicular to the second insert axis (A2) and the second insert minimum length (L2MIN), and
- the second insert minimum length (L2MIN) is greater than the second insert maximum width (W2MAX).
18. The cutting tool (20) according to claim 17, wherein the first insert maximum width (W1MAX) is greater than the second insert maximum width (W2MAX).
19. The cutting tool (20) according to claim 1, wherein the second insert receiving pocket (30) has a second insert tangential support wall (64) transverse to the second insert seat surface (62).
20. The cutting tool (20) according to claim 19, wherein the shoulder surface (84) forms a portion of the second insert seat surface (62).
21. The cutting tool (20) according to claim 19, wherein the entire second insert seat surface (62) is located radially outward of the first insert seat surface (56).
22. The cutting tool (20) according to claim 1, wherein a first tool plane (PT1) containing the tool axis (AT) intersects the first and second cutting inserts (24, 26).
23. The cutting tool (20) according to claim 22, wherein the first tool plane (PT1) intersects the shoulder surface (84) and the first insert peripheral side surface (40).
24. The cutting tool (20) according to claim 22, wherein in a cross-section taken in the first tool plane (PT1), the shoulder surface (84) and the first insert axial support wall (58) form an internal first pocket angle (α1).
25. The cutting tool (20) according to claim 1, wherein the shoulder surface (84) is contiguous with the first insert axial support wall (58).
26. The cutting tool (20) according to claim 1, wherein the second tool plane (PT2) intersects the shoulder surface (84).
27. The cutting tool (20) according to claim 1, wherein the first insert axial support wall (58) is located radially outward of the first insert seat surface (56).
28. The cutting tool (20) according to claim 1, wherein the shoulder surface (84) is spaced apart from the first insert seat surface (56) by the first insert axial support wall (58).
29. The cutting tool (20) according to claim 1, wherein the shoulder surface (84) is located radially outward of the first insert seat surface (56).
30. The cutting tool (20) according to claim 1, wherein the first insert peripheral side surface (40) is in contact with the entire first insert axial support wall (58).
31. The cutting tool (20) according to claim 1, wherein:
- the first insert axis (A1) intersects the first insert front and back end surfaces (36, 38) at front and back end points (N1, N2), respectively,
- a first insert median plane (M) perpendicular to the first insert axis (A1) is located midway between the front and back end points (N1, N2), and
- the first insert median plane (M) intersects the first insert axial support wall (58) and the second cutting insert (26).
32. The cutting tool (20) according to claim 1, wherein:
- in the side view of the cutting tool (20), no portion of the shoulder surface (84) is obscured by the first cutting insert (24).
33. The cutting tool (20) according to claim 1, wherein:
- the first insert peripheral side surface (40) includes two opposing first insert major side surfaces (66a, 66b) and two opposing first minor side surfaces (68a, 68b),
- the first cutting insert (24) has a first insert maximum width (W1MAX) defined between the two first insert major side surfaces (66a, 66b),
- the first insert axial support wall (58) has an axial support wall minimum height (HAMIN) above the first insert seat surface (56), and
- the axial support wall minimum height (HAMIN) is no less than 15% of the first insert maximum width (W1MAX).
34. The cutting tool (20) according to claim 33, wherein:
- the first insert receiving pocket (28) includes a first insert tangential support wall (86) transverse to the first insert seat surface (56),
- a tangential end wall (94) contiguous with the shoulder surface (84) faces in the direction of rotation (R) and is located rotationally forward of the first insert tangential support wall (86), and
- a height of the first insert axial support wall (58) above the first insert seat surface (56) increases in the direction of rotation (R) from the first insert tangential support wall (86) to the tangential end wall (94).
Type: Application
Filed: May 4, 2017
Publication Date: Nov 8, 2018
Applicant: Ingersoll Cutting Tool Company (Rockford, IL)
Inventors: Eric William NGUYEN (South Beloit, IL), William B. JOHNSON (Machesney Park, IL), Dennis Etienne ROEPSCH (Cherry Valley, IL)
Application Number: 15/586,647