Control of white-etched layer during machining

• US 7,805,824 B2
• Filed: 05/13/2010
• Issued: 10/05/2010
• Est. Priority Date: 08/06/2008
• Status: Active Grant

• Current Assignee: Rtx Corporation
• Original Assignee: United Technologies Corporation (Rtx Corporation)
• Inventors: Schmidt, Wayde R., Burlatsky, Sergei F., Guo, Changsheng, El-Wardany, Tahany Ibrahim
• Primary Examiner(s): Cadugan; Erica E
• Application Number:
  US12/779,191
• Publication Number:
  US 20100218657A1
• Time in Patent Office: 145 Days
• Field of Search: 409/249, 409/258, 409/345, 409135-136, 409139-140, 829/00, 831/70, 219/121.65, 219/121.67, 219/121.68, 451/7, 295/66, 29/565, 29/50, 407/13, 407/15, 407/18, 407/12
• US Class Current: 29/566
• CPC Class Codes: B23D 2043/025 for producing grooves in turbines, e.g. for the insertion of blades
• CPC Class Codes: B23D 37/22 for special purposes B23D37/14 takes precedence
• CPC Class Codes: B23D 43/04 having inserted cutting edges
• CPC Class Codes: B23P 25/006 Heating the workpiece by laser during machining
• CPC Class Codes: Y10T 29/49316 Impeller making
• CPC Class Codes: Y10T 29/49321 Assembling individual fluid flow interacting members, e.g., blades, vanes, buckets, on rotary support member
• CPC Class Codes: Y10T 29/49995 Shaping one-piece blank by removing material
• CPC Class Codes: Y10T 29/5147 including composite tool
• CPC Class Codes: Y10T 29/5176 including machining means
• CPC Class Codes: Y10T 407/16 Rectilinear broach
• CPC Class Codes: Y10T 409/400175 Process
• CPC Class Codes: Y10T 409/40105 with means to clean, lubricate, or modify temperature of work or cutter
• CPC Class Codes: Y10T 409/405775 with means to hold work during cutting
• CPC Class Codes: Y10T 83/0414 At localized area [e.g., line of separation]
• CPC Class Codes: Y10T 83/283 With means to control or modify temperature of apparatus or work
• CPC Class Codes: Y10T 83/293 Of tool

Abstract

A machining system includes a support configured to retain an article, such as a rotor disk, having an area, such as a surface of a slot in the disk. A cutting tool, for example, a broach, is movable relative to the support to cut the area. A heating member, such as a laser, is configured to locally heat the area of the article. In one example, the cutting tool includes a body having a cutting edge. The heating member is supported by the body and is configured to provide heat adjacent to the cutting edge. The cutting edge cuts the locally heated area while the area is still heated.

Claims

1. A cutting tool comprising:

a body that extends longitudinally, with multiple longitudinally spaced teeth supported on the body, each of the teeth including a cutting edge; and

a heating member including a lens supported by the body and provided in a gap between at least two adjacent ones of the teeth and that is configured to provide heat adjacent to one of the cutting edges.

2. The cutting tool according to claim 1, wherein an array of the lenses is provided in the gap.

3. The cutting tool according to claim 1, wherein the cutting tool is a broaching tool.

4. The cutting tool according to claim 1, wherein the heating member is provided at a rearward end of the body distal with respect to an article to be machined by the cutting tool.

5. The cutting tool according to claim 1, wherein a fiber is connected to the lens, the fiber configured to provide laser light to the lens.