Method for machining ceramic matrix composite

• US 9,850,175 B2
• Filed: 09/02/2015
• Issued: 12/26/2017
• Est. Priority Date: 03/08/2013
• Status: Active Grant

• Current Assignee: IHI Corporation
• Original Assignee: IHI Corporation
• Inventors: Araki, Takahito, Yano, Masaharu, Imanari, Kuniyuki, Ishitsu, Kouta, Ueda, Takashi, Hosokawa, Akira, Furumoto, Tatsuaki
• Primary Examiner(s): Cadugan, Erica E
• Application Number:
  US14/843,453
• Publication Number:
  US 20150376073A1
• Time in Patent Office: 846 Days
• Field of Search: 29 26 R, 29 26 A
• CPC Class Codes: B23C 2222/61 Metal matrices with metallic or non-metallic particles or fibres
• CPC Class Codes: B23C 2226/18 Ceramic
• CPC Class Codes: B23C 2226/27 Composites, e.g. fibre reinforced composites
• CPC Class Codes: B23C 3/00 Milling particular work; Special milling operations; Machines therefor milling gear-teeth B23F, heat assisted machining B23P25/00
• CPC Class Codes: B23C 9/00 Details or accessories so far as specially adapted to milling machines or cutter drives, control devices, or accessories, in general B23Q
• CPC Class Codes: B23K 2103/52 Ceramics
• CPC Class Codes: B23K 26/0006 taking account of the properties of the material involved B23K26/32, B23K26/40 take precedence
• CPC Class Codes: B23K 26/0093 combined with mechanical machining or metal-working covered by other subclasses than B23K combined welding or cutting procedures or apparatus B23K28/02
• CPC Class Codes: B23K 26/082 Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
• CPC Class Codes: B23K 26/352 for surface treatment
• CPC Class Codes: B23P 25/006 Heating the workpiece by laser during machining
• CPC Class Codes: C04B 41/0036 Laser treatment working by laser beam B23K26/00
• CPC Class Codes: C04B 41/009 characterised by the material treated
• CPC Class Codes: C04B 41/53 involving the removal of at least part of the materials of the treated article, e.g. etching, drying of hardened concrete C04B41/0036 - C04B41/0054 take precedence
• CPC Class Codes: Y10T 29/5107 Drilling and other
• CPC Class Codes: Y10T 409/303808 including infeeding
• CPC Class Codes: Y10T 409/304032 Cutter or work

Abstract

A method for machining a ceramic matrix composite (CMC), the method enhancing a machining speed for the ceramic matrix composite (CMC), includes: a step of scanning an irradiated portion of a surface of a machining target material by a laser head to irradiate the irradiated portion with laser light from the laser head, and forming a deteriorated layer on the irradiated portion of the surface of the machining target material; and a step of sequentially removing the deteriorated layer by an end mill, the deteriorated layer being formed on the irradiated portion, wherein the deteriorated layer is formed by heating the irradiated portion up to a predetermined temperature by irradiation of continuous oscillation laser light, and by forming a crack by irradiation of pulsed oscillation laser light.

Claims

1. A method for machining a ceramic matrix composite, the method comprising:

a step of scanning an irradiated portion of a surface of a machining target material by laser light to irradiate the irradiated portion with the laser light, and forming a deteriorated layer on the irradiated portion of the surface of the machining target material; and

a step of removing the deteriorated layer by a machining tool, the deteriorated layer being formed on the irradiated portion,

wherein the deteriorated layer is formed by heating the irradiated portion up to a predetermined temperature by irradiation of continuous oscillation laser light, and by forming a crack by irradiation of pulsed oscillation laser light.

2. The method according to claim 1, wherein, in the step of removing the deteriorated layer, the deteriorated layer formed on the irradiated portion is sequentially removed by the machining tool, which machining tool follows the irradiated portion apart from the irradiated portion by a predetermined distance.

3. The method according to claim 2, wherein the machining tool is an end mill.

4. The method according to claim 1,

wherein, in the step of forming a deteriorated layer, the deteriorated layer is formed in a predetermined region of the surface of the machining target material, and

in the step of removing the deteriorated layer, the deteriorated layer is removed after the deteriorated layer is formed in the predetermined region.