Abstract: A part including a material of the part having a first material property. A second material property of the first material or a different material, one of the first material property or the second material property being arranged to form a mark. A method for producing a part.

Abstract: A method of forming at least a portion of an earth-boring tool includes entering an electronic representation of at least one geometric feature of at least a component of an earth-boring tool in a computer system including memory and a processor, the computer system operatively connected to a multi-axis positioning system, a direct metal deposition tool, and a material removal tool. The processor generates a tool path for the direct metal deposition tool. The tool path is based at least in part on the electronic representation of the at least one geometric feature of the at least a component of the earth-boring tool. The direct metal deposition tool is operated along the tool path to deposit metal on an earth-boring tool component coupled to the multi-axis positioning system to at least partially fonn the at least one geometric feature of the earth-boring tool. Methods also include methods of repairing earth-boring tools.

Abstract: A method of forming at least a portion of an earth-boring tool using an electronic representation of at least one geometric feature of at least a component of an earth-boring tool stored in memory accessible by a processor operatively connected to a multi-axis positioning system, a direct metal deposition apparatus, and a material removal apparatus. The processor generates a deposition path for the direct metal deposition apparatus is based at least in part on the electronic representation of the at least one geometric feature of the at least a component of the earth-boring tool. The direct metal deposition tool is operated according to the generated deposition path to deposit metal material on an earth-boring tool component coupled to the multi-axis positioning system to at least partially form the at least one geometric feature of the earth-boring tool. Methods also include methods of repairing earth-boring tools.

Abstract: A method of forming a bore through a workpiece with a drill by monitoring drill orientation and bore position; and adjusting drill path as necessary. Adjusted the drill path includes selectively applying an axial impulse to the drill when the drill is in a designated azimuthal orientation. Drill orientation and bore position are monitored with an acoustic transmitter and receiver disposed adjacent an outer surface of the workpiece. The acoustic transmitter and receiver are moved at the same rate at which the drill axially progress through the workpiece, so that they are aligned with the bottom of the bore.

Abstract: An ECM method involves the use of a thin hollow electrode assembly that carries the electrolyte within and that is advanced relatively to the workpiece. The small profile of the electrode results in a minimal removal of metal in forming the desired rotor or stator shape. The electrode profile allows significant power consumption reduction or increased machining speed for a given rate of power input. The electrode can be a unitary ring shape or can be made of segments that are placed adjacent each other so that a continuous shape is cut. Not all the lobes of the stator or rotor have to be cut in the same pass. Electrode segments can be used to sequentially provide the desired lobe count in separate passes. The lobe shapes in the electrode can be slanted to get the desired rotor or stator pitch or they can be aligned with the workpiece axis.

Abstract: A method of forming a bore through a workpiece with a drill by monitoring drill orientation and bore position; and adjusting drill path as necessary. Adjusted the drill path includes selectively applying an axial impulse to the drill when the drill is in a designated azimuthal orientation. Drill orientation and bore position are monitored with an acoustic transmitter and receiver disposed adjacent an outer surface of the workpiece. The acoustic transmitter and receiver are moved at the same rate at which the drill axially progress through the workpiece, so that they are aligned with the bottom of the bore.