End mill grinder

Claim 2

A grinder for machine tool cutters constructed with reference to three mutually perpendicular axes, comprising: a frame; a grindwheel rotatably mounted on the frame to rotate about an axis parallel to and spaced from one of said three axes; a workhead including cutter holding means and motor means for turning the cutter about the longitudinal axis thereof; means feeding the cutter into and out of engagement with the grindwheel; means swinging the cutter about a first axis parallel to one of said three axes prior to engagement with the grindwheel; and means swinging the cutter simultaneously about said first axis and about a second axis perpendicular thereto while the cutter is in contact with the grindwheel.

Claim 3

A grinder for machine tool cutters according to claim 1 in which the last mentioned means includes a cam-and-follower arrangement controlling the rate of swing movement about said second axis.

Claim 4

A grinder for machine tool cutters according to claim 1 in which the last mentioned means includes means effecting movement about said first axis at a variable rate.

Claim 5

A grinder for machine tool cutters according to claim 1 in which the last mentioned means includes means effecting simultaneous movement at a variable rate about the first axis and at a uniform rate about the second axis.

Claim 6

A grinder for machine tool cutters according to claim 1 in which the first axis is horizontal and the second axis is vertical.

Claim 7

A grinder for machine tool cutters according to claim 1 in which the grindwheel revolves about an axis parallel to said second axis.

Claim 8

A grinder for machine tool cutters constructed with reference to three mutually perpendicular axes, comprising: a frame; a grindwheel rotatAbly mounted on the frame to rotate about an axis parallel to and spaced from one of said three axes; a workhead including cutter holding means and motor means for turning the cutter about the longitudinal axis thereof; means feeding the cutter into engagement with the grindwheel in position to bring the side face of a cutter land in contact with the grindwheel; and means producing a compound movement of the cutter simultaneously about two mutually perpendicular axes while said side face is in contact with the grindwheel.

Claim 9

A grinder for machine tool cutters constructed with reference to three mutually perpendicular axes, comprising: a frame; a grindwheel rotatAbly mounted on the frame to rotate about an axis parallel to and spaced from one of said three axes; a workhead including cutter holding means and motor means for turning the cutter about the longitudinal axis thereof; means feeding the cutter into engagement with the grindwheel in position to bring the side face of a cutter land in contact with the grindwheel; and means producing a compound movement of the cutter simultaneously about two mutually perpendicular axes while said side face is in contact with the grindwheel.

Claim 10

A grinder for machine tool cutters according to claim 7 in which the grindwheel revolves about an axis parallel to one of said two axes.

Claim 11

A grinder for machine tool cutters according to claim 7 in which the grindwheel has a peripheral ridge having side faces at substantially 90* to each other.

Claim 12

A grinder for machine tool cutters having helical cutting edges according to claim 9 in which one side face of said grindwheel ridge is disposed to the plane of revolution at an angle equal to approximately one-half the helix angle of the cutting edges on the cutter.

Claim 13

A grinder for machine tool cutters according to claim 7 in which the last mentioned means includes means swinging the cutter about one of said two axes prior to producing said compound movement.

Claim 14

A grinder for machine tool cutters according to claim 7 that also includes means swinging the cutter about one of said two axes prior to contact with the grindwheel through an angle that is a function of the helix angle of cutting edges on the cutter.

Claim 15

A grinder for machine tool cutters constructed with reference to three mutually perpendicular and intersecting fixed axes (X, Y, and Z) and a fourth cutter axis (T) which is angularly movable with reference to said three fixed axes (X, Y, Z), the grinder having a frame, a grind wheel rotatably mounted on the frame to rotate about an axis (Zoooo 3), a workhead including cutter holding means and motor means for turning the cutter about the longitudinal axis thereof, said axis being said angularly movable axis (T), and means feeding the cutter into and out of engagement with the grind wheel, characterized by means locating the cutter with its axis (T) at an angular displacement from the plane (X, Y), and passing through an axis (X1) parallel to another (X) of said perpendicularly intersecting axes (X,Y, & Z) prior to engagement with the grind wheel, means for controllably displacing said angularly movable axis (T) from the point of intersection of said mutually perpendicular axes (X, Y, and Z), and means swinging the cutter simultaneously about said axis (X1) which is parallel to said other (X) of said perpendicularly intersecting axes (X, Y, and Z) and about one (Z) of said perpendicularly intersecting axes while the cutter is in contact with the grind wheel, and last two means providing said controlled angularity, and said displacement, of said cutter axis (T).

Claim 16

A grinder for machine tool cutters constructed with reference to three mutually perpendicular and intersecting fixed axes (X, Y, and Z) and a fourth cutter axis (T) which is angularly movable with reference to said three fixed axes (X, Y, Z), the grinder having a frame, a grind wheel rotatably mounted on the frame to rotate about an axis (Zoooo 3), a workhead including cutter holding means and motor means for turning the cutter about the longitudinal axis thereof, said axis being said angularly movable axis (T), and means feeding the cutter into and out of engagement with the grind wheel, characterized by means locating the cutter with its axis (T) at an angular displacement from the plane (X, Y), and passing through an axis (X1) parallel to another (X) of said perpendicularly intersecting axes (X,Y, & Z) prior to engagement with the grind wheel, means for controllably displacing said angularly movable axis (T) from the point of intersection of said mutually perpendicular axes (X, Y, and Z), and means swinging the cutter simultaneously about said axis (X1) which is parallel to said other (X) of said perpendicularly intersecting axes (X, Y, and Z) and about one (Z) of said perpendicularly intersecting axes while the cutter is in contact with the grind wheel, and last two means providing said controlled angularity, and said displacement, of said cutter axis (T).

Claim 17

A grinder for machine tool cutters according to claim 13 in which the last mentioned means includes means effecting movement at a variable rate about said axis (X1) which is parallel to another (X) of said intersecting axes.

Claim 18

A grinder for machine tool cutters according to claim 14 in which the last mentioned means includes means simultaneously effecting movement at a uniform rate about said one (Z) of said perpendicularly intersecting axes.