Method and apparatus for reconditioning cylinder heads

Claim 1

A method of aligning the axis of a tool with the axis of a hole in a work piece having a known angle other than 90* with a known plane surface of said work piece, which comPrises steps of: a. mounting the work piece in a holder for rotation about a first work axis parallel to said plane surface and for rotation about a second work axis perpendicular to said first work axis, with said plane surface substantially perpendicular to said second work axis; b. rotating said work piece to a predetermined angular position about said second work axis; c. mounting along said tool axis a guide member adapted in size for insertion in said hole without substantial play transverse of the axis of said hole; d. simultaneously translating said holder parallel to said first work axis and rotating said holder about the first work axis until said guide member enters and passes freely in said hole without binding; and e. locking said holder against further rotation.

Claim 2

A method of aligning the axis of a tool with the axis of a hole in a work piece having a known angle other than 90* with a known plane surface of said work piece, which comPrises steps of: a. mounting the work piece in a holder for rotation about a first work axis parallel to said plane surface and for rotation about a second work axis perpendicular to said first work axis, with said plane surface substantially perpendicular to said second work axis; b. rotating said work piece to a predetermined angular position about said second work axis; c. mounting along said tool axis a guide member adapted in size for insertion in said hole without substantial play transverse of the axis of said hole; d. simultaneously translating said holder parallel to said first work axis and rotating said holder about the first work axis until said guide member enters and passes freely in said hole without binding; and e. locking said holder against further rotation.

Claim 3

The method of resizing a valve guide in a cylinder head which comprises the steps of: a. mounting the cylinder head in a cradle which is rotatable about a first normally horizontal work axis and about a second work axis orthogonal thereto; b. positioning the cradle mounted cylinder head for translation or sliding motion on the horizontal bed of a machine having a vertical-tool-rotation working axis; c. mounting for rotation about and translation along said tool axis an alignment tool adapted to be received in said valve guide without substantial play; d. setting the cylinder head to a predetermined rotational position about the second work axis of the cradle; e. rotating said head about the first work axis of the cradle; and f. translating the cradle on said bed of the machine until said alignment tool enters and rotates freely in said valve guide; and g. locking said cradle against further rotation about said first work axis; and h. substituting a working tool for the alignment tool in said machine.

Claim 4

The method of resizing a valve guide in a cylinder head which comprises the steps of: a. mounting the cylinder head in a cradle which is rotatable about a first normally horizontal work axis and about a second work axis orthogonal thereto; b. positioning the cradle mounted cylinder head for translation or sliding motion on the horizontal bed of a machine having a vertical-tool-rotation working axis; c. mounting for rotation about and translation along said tool axis an alignment tool adapted to be received in said valve guide without substantial play; d. setting the cylinder head to a predetermined rotational position about the second work axis of the cradle; e. rotating said head about the first work axis of the cradle; and f. translating the cradle on said bed of the machine until said alignment tool enters and rotates freely in said valve guide; and g. locking said cradle against further rotation about said first work axis; and h. substituting a working tool for the alignment tool in said machine.

Claim 5

A method of aligning the axis of a cylindrical opening in a work piece with the axis of a rotary tool wherein the axis of said opening in the work piece is other than 90* with respect to a known plane surface of said work piece for the purpose of modifying the opening in said work piece, comprising: a. supporting said work piece at right angles to the axis of the rotary tool for rotation relative to such axis about a first axis parallel with said known plane surface of said work piece, and also for rotation relative to such tool axis about a second axis at right angles to said known surface of said work piece; b. aligning the axis of said rotary tool with the axis of the opening in said work piece by rotating said work piece relative to said tool axis through an angle about the first axis of rotation of support of said work piece; c. rotating said work piece relative to said tool axis through a known angle about the second axis of rotation of the support of said work piece; d. mounting along said tool axis an alignment member adapted for insertion into the opening in said work piece without substantial play transverse of the axis of the opening in said work piece; e. providing relative movement between said work piece and said tool axis parallel to said first axis of rotation thereof until said alignment member can enter and freely rotate in the opening in said work piece; f. maintaining the relative positions of the tool axis and the work piece; and g. substituting said rotary tool for the alignment guide along said tool axis.

Claim 6

A method of aligning the axis of a cylindrical opening in a work piece with the axis of a rotary tool wherein the axis of said opening in the work piece is other than 90* with respect to a known plane surface of said work piece for the purpose of modifying the opening in said work piece, comprising: a. supporting said work piece at right angles to the axis of the rotary tool for rotation relative to such axis about a first axis parallel with said known plane surface of said work piece, and also for rotation relative to such tool axis about a second axis at right angles to said known surface of said work piece; b. aligning the axis of said rotary tool with the axis of the opening in said work piece by rotating said work piece relative to said tool axis through an angle about the first axis of rotation of support of said work piece; c. rotating said work piece relative to said tool axis through a known angle about the second axis of rotation of the support of said work piece; d. mounting along said tool axis an alignment member adapted for insertion into the opening in said work piece without substantial play transverse of the axis of the opening in said work piece; e. providing relative movement between said work piece and said tool axis parallel to said first axis of rotation thereof until said alignment member can enter and freely rotate in the opening in said work piece; f. maintaining the relative positions of the tool axis and the work piece; and g. substituting said rotary tool for the alignment guide along said tool axis.

Claim 7

A method of aligning the axis of a linearly operable tool with a selected direction line of a work piece, said direction line of the work piece having an angle other than 90* with a known plane surface of said work piece, the selected direction line being taken with respect to both an axis parallel to and orthogonal to the known plane surface of the work piece, and following alignment of said tool axis and said direction line causing modification of the work piece by said operable tool, comprising the steps of: a. supporting the work piece wIth a known plane surface thereof parallel both to a supporting flat bed and to a first axis of rotation of the work piece; b. supporting said tool so that the axis thereof is orthogonal to the flat bed; c. rotating the work piece through an angle about a second axis of rotation of the work piece orthogonal to the known plane surface thereof; d. rotating the work piece through an angle about the first axis of rotation of the work piece parallel to the known plane surface of the work piece, to cause the tool axis and selected direction line to be parallel; e. mounting an alignment tool along the tool axis to become coincident with the selected line; f. translating the work piece parallel to the flat bed, to cause the selected direction line and tool axis to be coincident; and g. substituting a working tool for the alignment tool for modification of the work piece in the selected direction.

Claim 8

A method of aligning the axis of a linearly operable tool with a selected direction line of a work piece, said direction line of the work piece having an angle other than 90* with a known plane surface of said work piece, the selected direction line being taken with respect to both an axis parallel to and orthogonal to the known plane surface of the work piece, and following alignment of said tool axis and said direction line causing modification of the work piece by said operable tool, comprising the steps of: a. supporting the work piece wIth a known plane surface thereof parallel both to a supporting flat bed and to a first axis of rotation of the work piece; b. supporting said tool so that the axis thereof is orthogonal to the flat bed; c. rotating the work piece through an angle about a second axis of rotation of the work piece orthogonal to the known plane surface thereof; d. rotating the work piece through an angle about the first axis of rotation of the work piece parallel to the known plane surface of the work piece, to cause the tool axis and selected direction line to be parallel; e. mounting an alignment tool along the tool axis to become coincident with the selected line; f. translating the work piece parallel to the flat bed, to cause the selected direction line and tool axis to be coincident; and g. substituting a working tool for the alignment tool for modification of the work piece in the selected direction.

Claim 9

A method of aligning the axis of a tool with the axis of a hole in a work piece, the hole in the work piece having a known angle other than 90* in relation to a known plane surface of the work piece, comprising the steps of: a. supporting said work piece for rotation about a first work axis parallel to said known plane surface, and for rotation about a second work axis perpendicular to said first work axis, with said known plane surface substantially perpendicular to said second work axis; b. rotating said work piece to a predetermined angular position about said first work axis; c. rotating said work piece about said second work axis; d. mounting an alignment member along one of the first two recited axes, namely, the axis of the tool and the axis of the hole; e. and providing relative translational movement of said work piece with respect to said tool axis to allow the alignment member mounted in said one of the first two recited axes to become coaxial with the other of said axes.

Claim 10

A method of aligning the axis of a tool with the axis of a hole in a work piece, the hole in the work piece having a known angle other than 90* in relation to a known plane surface of the work piece, comprising the steps of: a. supporting said work piece for rotation about a first work axis parallel to said known plane surface, and for rotation about a second work axis perpendicular to said first work axis, with said known plane surface substantially perpendicular to said second work axis; b. rotating said work piece to a predetermined angular position about said first work axis; c. rotating said work piece about said second work axis; d. mounting an alignment member along one of the first two recited axes, namely, the axis of the tool and the axis of the hole; e. and providing relative translational movement of said work piece with respect to said tool axis to allow the alignment member mounted in said one of the first two recited axes to become coaxial with the other of said axes.