JPS55138020A - Poppet valve for internal combustion engine - Google Patents
Poppet valve for internal combustion engineInfo
- Publication number
- JPS55138020A JPS55138020A JP4287879A JP4287879A JPS55138020A JP S55138020 A JPS55138020 A JP S55138020A JP 4287879 A JP4287879 A JP 4287879A JP 4287879 A JP4287879 A JP 4287879A JP S55138020 A JPS55138020 A JP S55138020A
- Authority
- JP
- Japan
- Prior art keywords
- poppet valve
- laser beam
- laser
- heat
- quenchable
- 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.)
- Pending
Links
Abstract
PURPOSE: To perform surface quenching without using a coolant, by treating the surface of a poppet valve material such as quenchable heat-resisting steel or stainless steel to reduce the light reflexibility of the surface and thereafter irradiating the surface with a laser beam of appropriately set energy density.
CONSTITUTION: A poppet valve 6 made of quenchable heat-resisting steel, stainless steel or the like is placed on a work rest 4, which performs scanning at a desired speed while rotating. The surface of the poppet valve 6 is previously treated with a salt bath, gas softening, phosphate coating or the like so that the surface is turned almost black and its reflexibility is reduced. A laser beam generated by a CO2 laser unit 1 is passed through a head 2 so that the laser beam is changed into a laser spot light 3 of desired dimensions. The laser spot light is irradiated upon the end face of the stem of the valve. According to this method, the treated part absorbs sufficient energy of the laser beam, the surface temperature of the part is raised and the treated part is cooled by heat conduction to the interior from the heated part. Therefore, no special coolant is needed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4287879A JPS55138020A (en) | 1979-04-09 | 1979-04-09 | Poppet valve for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4287879A JPS55138020A (en) | 1979-04-09 | 1979-04-09 | Poppet valve for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55138020A true JPS55138020A (en) | 1980-10-28 |
Family
ID=12648290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4287879A Pending JPS55138020A (en) | 1979-04-09 | 1979-04-09 | Poppet valve for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55138020A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5887225A (en) * | 1981-11-18 | 1983-05-25 | Toshiba Corp | Heat treatment for trapezoidal screw |
| JP2009524740A (en) * | 2006-01-26 | 2009-07-02 | オウベル・アンド・デュヴァル | Method for producing an internal combustion engine valve and the valve obtained by this method |
| CN102199698A (en) * | 2010-03-25 | 2011-09-28 | 中国科学院力学研究所 | Laser reinforcing process for valve seat of cylinder head |
-
1979
- 1979-04-09 JP JP4287879A patent/JPS55138020A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5887225A (en) * | 1981-11-18 | 1983-05-25 | Toshiba Corp | Heat treatment for trapezoidal screw |
| JP2009524740A (en) * | 2006-01-26 | 2009-07-02 | オウベル・アンド・デュヴァル | Method for producing an internal combustion engine valve and the valve obtained by this method |
| CN102199698A (en) * | 2010-03-25 | 2011-09-28 | 中国科学院力学研究所 | Laser reinforcing process for valve seat of cylinder head |
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