GB944894A - Internal combustion engine valve tappets and their manufacture - Google Patents
Internal combustion engine valve tappets and their manufactureInfo
- Publication number
- GB944894A GB944894A GB1717262A GB1717262A GB944894A GB 944894 A GB944894 A GB 944894A GB 1717262 A GB1717262 A GB 1717262A GB 1717262 A GB1717262 A GB 1717262A GB 944894 A GB944894 A GB 944894A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coating
- alloy
- tappet
- briquette
- wear
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/20—Making machine elements valve parts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
<PICT:0944894/C3/1> A valve tappet comprises a ferrous metal tubular body 10, Fig. 5, closed at one end 12 to form a base having a recessed portion surrounded by a peripheral ridge and a wear-resistant ferrous metal alloy coating 24 within the recess and fused to the base. The valve body is formed by upsetting or extrusion from a low carbon steel, e.g. containing carbon, manganese, phosphorous and sulphur or from a non-hardening stainless steel containing carbon and chromium. The wear resistant alloy containing carbon, molybdenum, tungsten and silicon or in addition chromium is pressed into a briquette 32, Fig. 4, which may be sintered before the fusion operation. A borax flux may be applied to the briquette or a calcium, aluminium or sodium flux is incorporated into the briquette material before forming. An induction heating coil 22 fuses the metals in a nitrogen atmosphere to form a coating alloy and the carbon and silicon constituents diffuse into the valve tappet base metal to form a diffusion bond and a carburized layer 34 is formed to provide support for the coating. A cooling water jet 36 promotes directional solidification of the coating alloy outwardly from the interface between the cooling and the end face of the tappet. The tappet may be subsequently carburized to provide a wear-resistant coating.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11469761A | 1961-06-05 | 1961-06-05 | |
US11469861A | 1961-06-05 | 1961-06-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB944894A true GB944894A (en) | 1963-12-18 |
Family
ID=26812464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1717262A Expired GB944894A (en) | 1961-06-05 | 1962-05-04 | Internal combustion engine valve tappets and their manufacture |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB944894A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2138914A (en) * | 1983-04-26 | 1984-10-31 | Ford Motor Co | Tappet |
US4485770A (en) * | 1980-12-24 | 1984-12-04 | Honda Giken Kogyo Kabushiki Kaisha | Material for valve-actuating mechanism of internal combustion engine |
WO2008005384A2 (en) * | 2006-06-30 | 2008-01-10 | Caterpillar Inc | Tappet assembly |
-
1962
- 1962-05-04 GB GB1717262A patent/GB944894A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4485770A (en) * | 1980-12-24 | 1984-12-04 | Honda Giken Kogyo Kabushiki Kaisha | Material for valve-actuating mechanism of internal combustion engine |
GB2138914A (en) * | 1983-04-26 | 1984-10-31 | Ford Motor Co | Tappet |
WO2008005384A2 (en) * | 2006-06-30 | 2008-01-10 | Caterpillar Inc | Tappet assembly |
WO2008005384A3 (en) * | 2006-06-30 | 2008-02-28 | Caterpillar Inc | Tappet assembly |
US7748359B2 (en) | 2006-06-30 | 2010-07-06 | Caterpillar Inc. | Tappet assembly |
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