A method of remanufacturing a cylinder head comprises the steps of removing material from the cylinder head around at least a portion of a crack in the cylinder head to form a slot, and applying a compound material using direct laser deposition to fill the slot. The direct laser deposition includes performing a pre-scanning operation at a first laser power and a first scan speed, and depositing the compound material at a second laser power and a second scan speed. The second laser power and the second scan speed may be respectively equal to or different from the first laser power and first scan speed. The first laser power and the second laser power are less than or equal to 700 W. The first scan speed and second scan speed are less than or equal to 700 mm/minute.

A method of remanufacturing a cylinder head comprises the steps of removing material from the cylinder head around at least a portion of a crack in the cylinder head to form a slot, and applying a compound material using direct laser deposition to fill the slot. The direct laser deposition includes performing a pre-scanning operation at a first laser power and a first scan speed, and depositing the compound material at a second laser power and a second scan speed. The second laser power and the second scan speed may be respectively equal to or different from the first laser power and first scan speed. The first laser power and the second laser power are less than or equal to 700 W. The first scan speed and second scan speed are less than or equal to 700 mm/minute.

A fixture for supporting a workpiece during a machining operation is disclosed. The fixture may include a seat configured to receive the workpiece. The fixture may further include a quick release lever mounted to the fixture and configured to displace the workpiece from the seat.

A fixture for supporting a workpiece during a machining operation is disclosed. The fixture may include a seat configured to receive the workpiece. The fixture may further include a quick release lever mounted to the fixture and configured to displace the workpiece from the seat.

A manufacturing method for an engine includes: preparing, as a preparing step, a cylinder head having a surface on which a ceiling surface of a combustion chamber is formed; forming, as a film formation step, a thermal insulation film on the ceiling surface; measuring, as a measurement step, a volume of the thermal insulation film; and selecting, as a selection step, a rank for an engine valve to be used in combination with the ceiling surface so as to correspond to an amount of difference of a measured volume of the thermal insulation film from a designed value of a volume of the thermal insulation film, the rank being selected from a plurality of ranks set in correspondence with thicknesses of umbrella portions of engine valves.

A manufacturing method for an engine includes: preparing, as a preparing step, a cylinder head having a surface on which a ceiling surface of a combustion chamber is formed; forming, as a film formation step, a thermal insulation film on the ceiling surface; measuring, as a measurement step, a volume of the thermal insulation film; and selecting, as a selection step, a rank for an engine valve to be used in combination with the ceiling surface so as to correspond to an amount of difference of a measured volume of the thermal insulation film from a designed value of a volume of the thermal insulation film, the rank being selected from a plurality of ranks set in correspondence with thicknesses of umbrella portions of engine valves.

The present application provides a method of evaluating valve tightness in a turbine by a data acquisition system. The method may include the steps of receiving a number of operating parameters from a number of sensors, wherein the operating parameters may include rotor acceleration and rotor speed, comparing the rotor acceleration and the rotor speed to predetermined values, and altering one or more of the operating parameters and/or initiating repair procedures if the rotor acceleration and/or the rotor speed is increasing and/or exceeds predetermined values.

The present application provides a method of evaluating valve tightness in a turbine by a data acquisition system. The method may include the steps of receiving a number of operating parameters from a number of sensors, wherein the operating parameters may include rotor acceleration and rotor speed, comparing the rotor acceleration and the rotor speed to predetermined values, and altering one or more of the operating parameters and/or initiating repair procedures if the rotor acceleration and/or the rotor speed is increasing and/or exceeds predetermined values.

A method of remanufacturing a prechamber assembly includes determining a width W of an original circumferential weld bead that extends around and joins a proximal end of an outer peripheral wall of a prechamber housing and a distal end of an outer peripheral wall of a body assembly, cutting through the weld bead in order to separate the prechamber housing from the body assembly, and removing material from an outer peripheral portion of a distal end portion of the body assembly. The method includes removing the material in an axial direction parallel to the central axis of the prechamber assembly for a distance that is from 2.5-3 times the width W.

Additive-manufacturing systems, surface-processing apparatuses, and methods of forming products using an additive-manufacturing head are provided. In one aspect, an additive-manufacturing system includes an additive-manufacturing head and a surface-processing device coupled to the additive-manufacturing head. In another aspect, a surface-processing apparatus for an additive-manufacturing head includes a housing configured to be coupled to the additive-manufacturing head and a surface-processing device coupled to the housing. In a further aspect, a method of forming a product using an additive-manufacturing head includes forming one or more layers of the product with the additive-manufacturing head and processing at least one of the one or more layers of the product with a surface-processing device coupled to the additive-manufacturing head.