The present invention relates to a drilling tool and method for modifying a blind hole in a blade root insert of a wind turbine. The invention further relates to an apparatus and method for cleaning a blind hole. The method for modifying a blind hole comprises: removing a blade screw located in the blind hole, inserting a drilling tool into the blind hole, fixing the drilling tool in a drill, recessing the blind hole by a predetermined depth, with a maximum diameter of the end section and of the hole bottom after recessing being smaller than or equal to a diameter of the end section prior to recessing and a transition from the end section to the hole bottom being round after recessing, removing the drilling tool and the drill, mounting the blade screw in the modified blind hole.

A method of producing cooling apertures in a combustion chamber head includes mechanically drilling a plurality of cooling apertures through the combustion chamber head from the downstream side of the combustion chamber head. A tool is inserted through at least one aperture for a fuel injector from the downstream side of the combustion chamber head and the tool is rotated about its axis while within the aperture for a fuel injector. Fluid is supplied from the drilling machine through the tool and jets of fluid are directed from nozzles in the tool with at least a radial component towards the cooling apertures on the upstream side of the combustion chamber head to remove burrs and/or caps adjacent the cooling apertures. The present disclosure enables cooling apertures to be drilled through a combustion chamber head using conventional mechanical drilling in a viable and cost effective manner.

Certain embodiments of the disclosure may include systems, methods, and apparatus for locating and drilling closed holes of a gas turbine component. According to an example embodiment, the method can include receiving position data associated with one or more holes in a gas turbine component; receiving predefined hole position data from manufacturing data associated with the gas turbine component; determining at least one missing hole, based at least in part on comparing the received position data to the predefined hole position data; and drilling at least one hole in the gas turbine component corresponding to the determined at least one missing hole.

A method for positioning a rotary part on a machining fixture adapted to hold the rotary part for a machining operation is described. The machining fixture has a center axis and a diaphragm with engaging segments affixed thereto and extending away therefrom. The method includes mounting the rotary part on the machining fixture concentrically about the center axis and adjacent to the engaging segments, and then applying an axial force in a direction substantially parallel to the center axis against the diaphragm. This elastically deforms the diaphragm and radially displaces the contact members of the engaging segments into frictional engagement with a circumferential surface of the rotary part.

The machine tool 1 for machining a hole 3a of a desired size in a workpiece 3, includes: a main shaft 30 holding a tool 2; a spindle unit 40 including a spindle 41 which holds the shaft 30 rotatably on the axis r of rotation, and a housing 42 which covers the periphery of the spindle 41; a drive unit 50 for holding the unit 40 tiltably with respect to the workpiece 3 held by a holder 20, and for moving the unit 40 relative to the workpiece 3; a mount 70 extending from the housing 42 toward the periphery of the shaft 30; and a control section 90 which, based on the results of measurement by distance measurement sensors 82 held by the mount 70, controls the unit 50 so as to correct the inclination of the shaft 30 with respect to the workpiece 3.

A positioning assembly for positioning a rotary part to be machined includes a machining fixture and a positioning device having an elastically-deformable diaphragm concentrically mounted to the fixture and defining an annular loading zone which receives an axial force substantially parallel with a center axis of the fixture. The positioning device has circumferentially-spaced engaging segments, fixed to the diaphragm and extending away therefrom, which have contact members that are displaced radially to frictionally engage the rotary part when the axial force is applied to the loading zone of the diaphragm.

A method is provided for remanufacturing a machine component having multiple holes. The holes are provided to match in alignment with corresponding holes of an adjacent component in a machine assembly. First and second sets of holes are selected from the holes of the machine component on the basis of being located within first and second limits of positional tolerance with respect to corresponding holes of the adjacent component. Each hole from the first set of holes is bored to define openings in axial alignment with holes of the adjacent component. Each hole from the second set of holes is bored to an enlarged diameter and then plugged with a deformable insert. Each of these inserts is then drilled to define openings in axial alignment with holes of the adjacent component.

A first aspect of the invention provides for a fixture for securing a component to be drilled. The fixture may comprise: a support structure positioning the component thereon; a template substantially surrounding the component configured to locate a position on the component that is to be drilled, the template being positioned on the support structure and having at least one hole therethrough; and a centering device positioned on the support structure configured to center the component within the template.

A finishing apparatus enables an outer diameter of a seal ring to be reduced. The finishing apparatus includes a first plate including a first peripheral angled surface, and a second plate including a second peripheral angled surface. The second peripheral angled surface is spaced a distance from the first peripheral angled surface when the finishing apparatus is assembled. The first and second peripheral angled surfaces define at least a portion of a wedge-shaped receiving cavity that is shaped complementary to a shape of an inner diameter of the seal ring to facilitate securing the seal ring in position relative to the finishing apparatus while the outer diameter of the seal ring is finished to a pre-determined size.