Milling tool for portion of slot in rotor

Patent metadata

Field	Value
Publication number	US-9623492-B2
Application number	US-201514671293-A
Country	US
Kind code	B2
Filing date	Mar 27, 2015
Priority date	Mar 27, 2015
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

A milling tool is disclosed. The tool may include a base including a clamp for coupling to a selected mounting slot of a plurality of slots of the rotor; a milling tool including a motorized milling head; and a motorized linear actuator coupling the milling tool to the base. The base mounts the motorized linear actuator at an acute angle relative a portion of the slot to allow the motorized linear actuator to linearly move the milling tool to machine the portion of the slot. The portion of the slot may include, for example, an end face and, more particularly, a root corner of the slot where a cooling slot flange extends from the root of the slot. The milling tool may be portable.

First claim

What is claimed is:

1. A milling tool apparatus for a slot in a rotor, the milling tool apparatus comprising:
a base including a clamp for coupling to a selected mounting slot of a plurality of slots of the rotor;
a milling tool including a motorized milling head; and
a motorized linear actuator coupling the milling tool to the base,
wherein the base mounts the motorized linear actuator at an acute angle relative to an end face of the slot to allow the motorized linear actuator to linearly move the milling tool to machine a portion of the slot,
wherein the clamp is configured to hold the base in position relative to the selected mounting slot.

2. The milling tool apparatus of claim 1 , wherein the base and the motorized linear actuator include at least one handle.

3. The milling tool apparatus of claim 1 , further comprising an automated control system for controlling operation of the motorized milling head and the motorized linear actuator.

4. The milling tool apparatus of claim 3 , wherein the automated control system includes a handheld controller operatively coupled to the milling tool and the motorized linear actuator.

5. The milling tool apparatus of claim 4 , wherein the handheld controller includes a touchscreen.

6. The milling tool apparatus of claim 1 , wherein the motorized linear actuator includes:
a body;
a motor coupled to the body;
a milling tool slide mount slidably coupling the milling tool to the body; and
a ball screw operatively coupled to the milling tool slide mount and the motor to linearly move the milling tool slide mount and the milling tool relative to the body.

7. The milling tool apparatus of claim 6 , wherein the body and the base include mating alignment elements aligning the motorized milling head at the acute angle relative to the end face of the slot.

8. The milling tool apparatus of claim 1 , wherein the base includes:
a clamp positioning member for positioning the clamp; and
a mount for operatively coupling the motorized linear actuator to the base, the mount defining the acute angle of the motorized linear actuator relative to the end face of the slot.

9. The milling tool apparatus of claim 8 , wherein the mount is further configured to position the motorized linear actuator at a second acute angle relative to an axis of a turbomachine including the rotor and at a third acute angle relative to the axis of the turbomachine.

10. The milling tool apparatus of claim 9 , wherein the first acute angle is approximately 47° to 49°.

11. The milling tool apparatus of claim 1 , wherein the clamp further includes an adjustable fastener to allow selective securing and removal of the clamp in the selected mounting slot of the plurality of slots of the rotor.

12. The milling tool apparatus of claim 1 , wherein the rotor is positioned in-situ within a turbomachine during use of the milling tool.

13. A milling tool apparatus for a slot of a rotor, the tool comprising:
a base including a clamp configured to mount in a selected mounting slot of a plurality of slots of the rotor, each slot including an end face and a cooling slot flange extending from a root corner of the slot;
a milling tool including a motorized milling head; and
a motorized linear actuator coupling the milling tool to the base,
wherein the base mounts the motorized linear actuator at an acute angle relative to the root corner of the slot to allow the motorized linear actuator to linearly move the milling tool to machine the root corner of the slot,
wherein the clamp is configured to hold the base in position relative to the selected mounting slot.

14. The milling tool apparatus of claim 13 , wherein the base and the linear actuator include at least one handle.

15. The milling tool apparatus of claim 13 , further comprising an automated control system for controlling operation of the motorized milling head and the motorized linear actuator.

16. The milling tool apparatus of claim 15 , wherein the automated control system includes a handheld controller operatively coupled to the milling tool and the motorized linear actuator.

17. The milling tool apparatus of claim 16 , wherein the handheld controller includes a touchscreen.

18. The milling tool apparatus of claim 13 , wherein the motorized linear actuator includes:
a body;
a motor coupled to the body;
a milling tool slide mount slidably coupling the milling tool to the body; and
a ball screw operatively coupled to the milling tool slide mount and the motor to linearly move the milling tool slide mount and the milling tool relative to the body.

19. The milling tool apparatus of claim 18 , wherein the body and the base include mating alignment elements aligning the motorized milling head at the acute angle relative to the end face of the slot.

20. The milling tool apparatus of claim 13 , wherein the base includes:
a clamp positioning member for positioning the clamp; and
a mount for operatively coupling the motorized linear actuator to the base, the mount defining the acute angle of the motorized linear actuator relative to the end face of the slot, and
wherein the mount is further configured to position the motorized linear actuator at a second acute angle relative to an axis of a turbomachine including the rotor and at a third acute angle relative to the axis of the turbomachine.

21. The milling tool apparatus of claim 13 , wherein the clamp further includes an adjustable fastener to allow selective securing and removal of the clamp in the selected mounting slot of the plurality of slots of the rotor.

22. The milling tool apparatus of claim 13 , wherein the rotor is positioned in-situ within a turbomachine during use of the milling tool.

Assignees

• Gen Electric

Inventors

• Capriotti Daryl Paul
• Holmes James Bradford
• Trimmer Andrew Lee

Classifications

• B23Q9/02

  for securing machines or apparatus to workpieces, or other parts, of particular shape, e.g. to beams of particular cross-section · CPC title

• Y10T409/304424

  Means for internal milling · CPC title

• B23C2215/52

  Axial turbine wheels · CPC title

• B23C9/00

  Details or accessories so far as specially adapted to milling machines or cutter (drives, control devices, or accessories, in general B23Q) · CPC title

• B23Q9/0007

  Portable machines comprising means for their guidance or support directly on the workpiece · CPC title