JPS6432053A - Manufacture of cylinder hear for engine - Google Patents

Manufacture of cylinder hear for engine

Info

Publication number
JPS6432053A
JPS6432053A JP18662187A JP18662187A JPS6432053A JP S6432053 A JPS6432053 A JP S6432053A JP 18662187 A JP18662187 A JP 18662187A JP 18662187 A JP18662187 A JP 18662187A JP S6432053 A JPS6432053 A JP S6432053A
Authority
JP
Japan
Prior art keywords
irradiated
combustion chamber
final
parts
lowering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP18662187A
Other languages
Japanese (ja)
Other versions
JP2537889B2 (en
Inventor
Junichi Yamamoto
Katsuya Ouchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP62186621A priority Critical patent/JP2537889B2/en
Publication of JPS6432053A publication Critical patent/JPS6432053A/en
Application granted granted Critical
Publication of JP2537889B2 publication Critical patent/JP2537889B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/248—Methods for avoiding thermal stress-induced cracks in the zone between valve seat openings

Abstract

PURPOSE:To prevent drop in compression ratio due to surface cutting as well as to prevent thermal fatigue strength from lowering by situating the final part of an irradiated part at the section outside of a combustion chamber when a high density energy heat ray is irradiated to a cylinder head. CONSTITUTION:When a high density energy heat ray is irradiated to a cast cylinder head 1 and it is remelted, this irradiation is started from both (a) and (e) points in a combustion chamber, going forward to b-d and f-g, and the final parts d, g of irradiated parts 9, 10 are situated at the outside of a section of the combustion chamber. With this constitution, each recess part is produced in these final parts d, g, and even if this recess is subjected to surface cutting, a compression ratio and thermal fatigue strength both can be prevented from lowering.
JP62186621A 1987-07-28 1987-07-28 Method of manufacturing engine cylinder head Expired - Fee Related JP2537889B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62186621A JP2537889B2 (en) 1987-07-28 1987-07-28 Method of manufacturing engine cylinder head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62186621A JP2537889B2 (en) 1987-07-28 1987-07-28 Method of manufacturing engine cylinder head

Publications (2)

Publication Number Publication Date
JPS6432053A true JPS6432053A (en) 1989-02-02
JP2537889B2 JP2537889B2 (en) 1996-09-25

Family

ID=16191784

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62186621A Expired - Fee Related JP2537889B2 (en) 1987-07-28 1987-07-28 Method of manufacturing engine cylinder head

Country Status (1)

Country Link
JP (1) JP2537889B2 (en)

Also Published As

Publication number Publication date
JP2537889B2 (en) 1996-09-25

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees