Title:
CRAWLER TRACK LINK AND METHOD FOR MANUFACTURING THE SAME
Document Type and Number:
WIPO Patent Application WO/2007/108486
Kind Code:
A1
Abstract:
Desired hardness distribution is attained for each portion of a crawler track link through a small number of steps. The method for manufacturing the crawler track link comprises a step for forming a crawler track link (3) having a tread portion (13), a crawler tracked fixing face portion (14) at a position opposing the tread portion (13), and a window (18) in the side face by hot forging, and a step for cooling the tread portion (13) at a first cooling rate, cooling the crawler track fixing face portion (14) and the corner portion of the window (18) on the crawler track fixing face portion side at a second cooling rate lower than the first cooling rate, and a step for cooling the remaining portions of the crawler track link (3) excluding the tread portion, the crawler track fixing face portion and the corner portion at a third cooling rate lower than the second cooling rate, wherein the first cooling rate is the cooling rate at which the tread portion (13) is quenched.
Inventors:
OKAWA KAZUHIDE (US)
SUNADA HIROSHI (JP)
KONNO HARUKA (JP)
SUNADA HIROSHI (JP)
KONNO HARUKA (JP)
Application Number:
PCT/JP2007/055736
Publication Date:
September 27, 2007
Filing Date:
March 20, 2007
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
OKAWA KAZUHIDE (US)
SUNADA HIROSHI (JP)
KONNO HARUKA (JP)
OKAWA KAZUHIDE (US)
SUNADA HIROSHI (JP)
KONNO HARUKA (JP)
International Classes:
C21D9/00; B21K23/02; B62D55/21; C21D1/10
Foreign References:
| JPH1088228A | 1998-04-07 | |||
| JPH059488B2 | 1993-02-05 |
Attorney, Agent or Firm:
YANASE, Mutsuyasu et al. (8th Floor UK Building, 1-32-14, Takadanobab, Shinjuku-ku Tokyo 75, JP)
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