Cutting tool assembly

Claim 2

A cutting tool assembly comprising: a hard wear resistant insert having a forward cutting portion, a shim and a blade body having a longitudinal axis, said shim having a rearwardly extending recess for receiving said insert, said insert resting against the rear portion of said shim recess, said shim recess tapering toward the open end of said shim recess to springingly hold said insert, said blade body having a downwardly and rearwardly extending recess on a first end for receiving said shim and insert, said blade body recess also being inclined to said longitudinal axis of said blade body, said blade body recess tapering toward said blade body to wedgingly hold said shim and insert.

Claim 3

The cutting tool assembly in claim 1 wherein the rear peripheral edge of said shim and the rear portion of said blade body recess form a gap when said insert, shim and blade body are fully engaged.

Claim 4

The cutting tool assembly in claim 2 wherein said shim has a longitudinal slot extending rearward of said shim recess.

Claim 5

The cutting tool assembly in claim 3 wherein said shim has a land portion of reduced cross sectional thickness rearward of said rear portion of said shim recess, said land being the bottom of a notch formed when said shim recess receives said insert.

Claim 6

The cutting tool assembly in claim 4 wherein the upper and lower peripheral edges of said insert are V-shaped and the upper and lower portions of said shim recess have V-shaped grooves, said V-shaped edges slidably engaging said V-shaped grooves.

Claim 7

The cutting tool assembly in claim 5 wherein the upper and lower peripheral edges of said shim are V-shaped and the upper and lower portions of said blade body recess have V-shaped grooves, said V-shaped edges slidably engaging said V-shaped grooves.

Claim 8

The cutting tool assembly in claim 6 wherein said upper peripheral edge of said insert is comprised of a rear upper portion and a forward upper portion, the rear upper portion being downwardly inclined with respect to the forward upper portion.

Claim 9

The cutting tool assembly in claim 7 wherein said insert has a chip control slot with a width varying along its length, said slot extending upwardly and away from the forward cutting portion.

Claim 10

The cutting tool assembly in claim 8 wherein said blade body recess has semi-circular portion at the juncture of the upper and rear portions of said blade body recess and said shim has a V-shaped notch at the juncture of the upper and rear peripheral edges of said shim, said semi-circular portion communicating with said V-shaped notch when said shim and insert are received by said blade recess.

Claim 11

The cutting tool assembly in claim 9 wherein the thickness of said insert in plan view is greatest at the forward cutting portion, said thickness being greater than the thickness of said shim and blade.

Claim 12

The cutting tool assembly in claim 10 wherein said shim has a chamfer at the juncture of the lower and rear peripheral edges of said shim.

Claim 13

The cutting tool assembly in claim 1 wherein said blade body has a blade body recess on a second end.

Claim 14

The cutting tool assembly in claim 12 wherein when said blade body is turned end over end, the blade body recess on said second end will be in the same position formerly occupied by said blade body recess on said first end.

Claim 15

The cutting tool assembly in claims 11 or 13 wherein said blade body is generally flat and plate-like and has a thickness when viewed in plan much less than the width when viewed from the side.

Claim 16

The cutting tool assembly as in claim 1 wherein the profile of said insert, shim and blade body when fully engaged is smooth and curvilinear above the forward cutting portion of said insert.

Claim 17

The cutting tool assembly as in claim 15 wherein the profile of said insert, shim and blade when fully engaged is smooth and straight below the forward cutting portion of said insert.

Claim 18

A shim and insert for use in a cutting tool assembly comprising: a hard wear resistant insert and a shim, said insert having a forward cutting portion, a seating portion directly opposed to said cutting portion, an upper peripheral edge and a lower peripheral edge; said shim having an upper arm of substantially uniform cross section and a rearwardly extending recess for receiving said insert, said recess having an upper portion, a lower portion and a rear portion; the upper and lower portions of said shim recess engaging the upper and lower peripheral edges, respectively, of said insert, said recess tapering the open end of said recess to springingly hold said insert, said shim having a longitudinal slot extending rearward of said recess, and when said shim and insert are fully engaged, the seating portion of said insert rests against the rear portion of said shim recess, said shim having a land portion of reduced cross sectional thickness rearward of said rear portion of said shim recess, said land being the bottom of a notch formed between said shim and said seating portion of said insert when said shim recess receives said insert.

Claim 19

A shim and insert for use in a cutting tool assembly comprising: a hard wear resistant insert and a shim, said insert having a forward cutting portion, a seating portion directly opposed to said cutting portion, an upper peripheral edge and a lower peripheral edge; said shim having an upper arm of substantially uniform cross section and a rearwardly extending recess for receiving said insert, said recess having an upper portion, a lower portion and a rear portion; the upper and lower portions of said shim recess engaging the upper and lower peripheral edges, respectively, of said insert, said recess tapering the open end of said recess to springingly hold said insert, said shim having a longitudinal slot extending rearward of said recess, and when said shim and insert are fully engaged, the seating portion of said insert rests against the rear portion of said shim recess, said shim having a land portion of reduced cross sectional thickness rearward of said rear portion of said shim recess, said land being the bottom of a notch formed between said shim and said seating portion of said insert when said shim recess receives said insert.

Claim 20

The shim and insert of claim 17 wherein the upper and lower peripheral edges of said insert are V-shaped and the upper and lower portions of said shim recess have V-shaped grooves, said V-shaped edges slidably engaging said V-shaped grooves.

Claim 21

The shim and insert of claim 18 wherein said shim has an upper, lower and rear peripheral edge, said upper and lower peripheral edges being V-shaped.

Claim 22

The shim and insert of claim 19 wherein said upper peripheral edge of said insert is comprised of a rear upper portion adjacent to the seating portion and a forward upper portion adjacent to the forward cutting portion, the rear upper portion being downwardly inclined with respect to the forward upper portion.

Claim 23

The shim and insert of claim 20 wherein said insert has a chip control slot with a width varying a1ong its length, said slot extending upwardly and away from the forward cutting portion.

Claim 24

The shim and insert of claim 21 wherein said shim has a V-shaped notch at the juncture of the upper and rear peripheral edges of said shim.

Claim 25

The shim and insert of claim 22 wherein the thickness of said insert in plan view is greatest at the forward cutting portion, said thickness being greater than the thickness of said shim.

Claim 26

The shim and insert of claim 23 wherein said shim has a chamfer at the juncture of the lower and rear peripheral edges of said shim.

Claim 27

The shim and insert of claim 24 wherein the profile of said insert and shim when fully engaged is smooth and curvilinear above the forward cutting portion of said insert.

Claim 28

The shim and insert of claim 25 wherein the profile of said insert and shim when fully engaged is smooth and straight below the forward cutting portion of said insert.