Rotary cutting tool having disk-shaped cutter body provided with support pads

Patent metadata

Field	Value
Publication number	US-9676044-B2
Application number	US-201314135164-A
Country	US
Kind code	B2
Filing date	Dec 19, 2013
Priority date	Dec 19, 2013
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A cutting tool and cutter body assembly, including a disk-shaped cutter body and a plurality of support pads removably retained therein, the cutter body having an axis of rotation, two opposing end surfaces and a body peripheral surface extending therebetween. Each support pad intersects one of two annular-shaped planes equidistantly offset from opposite sides of a median plane perpendicular to the axis of rotation, and the cutter body intersects neither of the two annular-shaped planes. Each support pad is configured to make operative contact with a machined surface of a workpiece perpendicular to the axis of rotation. Each support pad has opposing upper and lower surfaces and a pad peripheral surface extending therebetween, the pad peripheral surface having an upper portion intersecting the upper surface, and the upper portion exhibiting N-fold rotational symmetry about a pad axis non-perpendicular to the lower surface.

First claim

What is claimed is:

1. A cutter body assembly ( 20 , 20 ′) comprising:
a disk-shaped cutter body ( 22 ) and a plurality of support pads ( 24 , 24 ′) removably retained therein,
the cutter body ( 22 ) having an axis of rotation (R), a direction of rotation (DR) about the axis of rotation (R), two opposing end surfaces ( 26 a , 26 b ) and a body peripheral surface ( 28 ) extending therebetween, and
each of the plurality of support pads ( 24 , 24 ′) protruding from one of the two opposing end surfaces ( 26 a , 26 b ),
wherein a median plane (M) perpendicular to the axis of rotation (R) intersects the body peripheral surface ( 28 ), and two annular-shaped planes (P 1 ) are equidistantly offset from opposite sides of the median plane (M) by a first distance (D 1 ),
wherein each of the plurality of support pads ( 24 , 24 ′) intersects one of the two annular-shaped planes (P 1 ), and the cutter body ( 22 ) intersects neither of the two annular-shaped planes (P 1 ); and
wherein not all of the plurality of support pads ( 24 , 24 ′) intersect the same annular-shaped plane (P 1 ).

2. The cutter body assembly ( 20 , 20 ′) according to claim 1 , wherein the median plane (M) intersects the body peripheral surface ( 28 ) along its entire circumference.

3. The cutter body assembly ( 20 , 20 ′) according to claim 1 , wherein the body peripheral surface ( 28 ) has a plurality of circumferentially spaced apart body recesses ( 30 ) equal in number to the plurality of support pads ( 24 , 24 ′), and
wherein the median plane (M) intersects each of the plurality of body recesses ( 30 ).

4. The cutter body assembly ( 20 , 20 ′) according to claim 3 , wherein each of the plurality of body recesses ( 30 ) opens out to at least one of the two opposing end surfaces ( 26 a , 26 b ).

5. The cutter body assembly ( 20 , 20 ′) according to claim 3 , wherein each of the plurality of body recesses ( 30 ) opens out to both opposing end surfaces ( 26 a , 26 b ).

6. The cutter body assembly ( 20 , 20 ′) according to claim 3 , wherein the body peripheral surface ( 28 ) has a plurality of outer peripheral portions ( 34 ) circumferentially alternating with the plurality of body recesses ( 30 ), and each outer peripheral portion ( 34 ) intersects the median plane (M) to define the arc of a first pie-shaped sector (S 1 ) having a first center point (C 1 ) contained in the axis of rotation (R), and
wherein each first pie-shaped sector (S 1 ) at least partially contains the axial projection of a single support pad ( 24 , 24 ′).

7. The cutter body assembly ( 20 , 20 ′) according to claim 6 , wherein the plurality of first pie-shaped sectors (S 1 ) are identical to each other.

8. The cutter body assembly ( 20 , 20 ′) according to claim 1 , wherein the plurality of support pads ( 24 , 24 ′) are identical to each other, and
wherein an equal number of support pads ( 24 , 24 ′) intersect each of the two annular-shaped planes (P 1 ).

9. The cutter body assembly ( 20 , 20 ′) according to claim 1 , wherein two circumferentially adjacent support pads ( 24 , 24 ′) intersect different annular-shaped planes (P 1 ).

10. The cutter body assembly ( 20 , 20 ′) according to claim 1 , wherein the cutter body ( 22 ) has a plurality of pad pockets ( 40 ) for mounting and indexing the plurality of support pads ( 24 , 24 ′), and each support pad ( 24 , 24 ′) has an axially outermost point (NO) located a second distance (D 2 ) from the median plane (M), and
wherein each support pad ( 24 , 24 ′) is indexable in its associated pad pocket ( 40 ) to increase or decrease the second distance (D 2 ).

11. The cutter body assembly ( 20 , 20 ′) according to claim 10 , wherein the second distance (D 2 ) is equal to or greater than the first distance (D 1 ).

12. The cutter body assembly ( 20 , 20 ′) according to claim 10 , wherein each pad pocket ( 40 ) has a planar seat surface ( 42 ) non-parallel to the median plane (M), and each support pad ( 24 ) has opposing upper and lower surfaces ( 44 , 46 ) and a pad peripheral surface ( 48 ) extending therebetween, and
wherein each lower surface ( 46 ) abuts its associated seat surface ( 42 ) in each index position of the support pad ( 24 , 24 ′).

13. The cutter body assembly ( 20 , 20 ′) according to claim 12 , wherein each support pad ( 24 , 24 ′) is indexable about a pocket axis (A 1 ) perpendicular to its associated seat surface ( 42 ).

14. The cutter body assembly ( 20 , 20 ′) according to claim 13 , wherein each support pad ( 24 , 24 ′) is removably fastened in its associated pad pocket ( 40 ) by means of a fastening screw ( 58 ).

15. The cutter body assembly ( 20 ) according to claim 14 , wherein each support pad ( 24 ) has a protuberance ( 60 ) extending away from its lower surface ( 46 ), and
wherein the fastening screw ( 58 ) threadingly engages a first threaded bore ( 60 ) in a distal surface ( 64 ) of the protuberance ( 60 ).

16. The cutter body assembly ( 20 ) according to claim 15 , wherein the first threaded bore ( 60 ) is coaxial with the pocket axis (A 1 ).

17. The cutter body assembly ( 20 , 20 ′) according to claim 12 , wherein each seat surface ( 42 ) forms an acute first inclination angle (α 1 ) with the median plane (M), and
wherein the first inclination angle (α 1 ) has a value of less than 20 degrees.

18. The cutter body assembly ( 20 , 20 ′) according to claim 12 , wherein each pad peripheral surface ( 48 ) has an upper portion ( 50 ) intersecting its associated upper surface ( 44 ), and each upper portion ( 50 ) exhibits N-fold rotational symmetry about a pad axis (A 2 ),
wherein each support pad ( 24 , 24 ′) has N index positions in its associated pad pocket ( 40 ), and
wherein the pad axis (A 2 ) is non-perpendicular to its associated seat surface ( 42 ).

19. The cutter body assembly ( 20 , 20 ′) according to claim 18 , wherein each pad axis (A 2 ) forms an acute second inclination angle (α 2 ) with its associated seat surface ( 42 ), and
wherein the second inclination angle (α 2 ) has a value of greater than 80 degrees.

20. The cutter body assembly ( 20 , 20 ′) according to claim 18 , wherein:
said each upper portion ( 50 ) has N planar facets ( 50 ), and
wherein at least three consecutive planar facets ( 54 ) about the pad axis (A 2 ) face an equal number of corresponding planar walls ( 56 ) in the associated pad pocket ( 40 ).

21. The cutter body assembly ( 20 , 20 ′) according to claim 12 , wherein the axially outermost point (NO) of each support pad ( 24 , 24 ′) is formed on its upper surface ( 44 ), and
wherein each upper surface ( 44 ) is convexly shaped.

22. A cutting tool ( 70 ) comprising:
a cutter body assembly ( 20 ) according to claim 1 ; and
a plurality of cutting inserts ( 32 ) removably retained in the cutter body ( 22 ) and circumferentially spaced about the body peripheral surface ( 28 ),
wherein each of the plurality of support pads ( 24 ) is configured to make operative contact with a machined surface ( 76 a , 76 b ) of a workpiece ( 78 ), and
wherein the machined surface ( 76 a , 76 b ) is perpendicular to the axis of rotation (R).

23. The cutting tool ( 70 ) according to claim 22 , wherein the total number of support pads ( 24 ) and the total number of cutting inserts ( 32 ) are equal.

24. The cutting tool ( 70 ) according to claim 22 , wherein not all of the plurality of support pads ( 24 ) intersect the same annular-shaped

Assignees

• Iscar Ltd

Inventors

• Eisen Yaron
• Mokthar Roohi

Classifications

• B23C2220/40

  Using guiding means · CPC title

• B23B2251/56

  Guiding pads · CPC title

• B23D61/0275

  Slots in the saw blade body for reducing tension or vibration · CPC title

• B23C3/30

  Milling straight grooves, e.g. keyways · CPC title

• B23C2210/56

  Supporting or guiding sections located on the periphery of the tool · CPC title