Claims
- 1. A method of making a camshaft component, the method comprising:
- forming a first powdered metal preform, the first powdered metal preform having an outer portion and a boss portion;
- compressing the first powdered metal preform so that the boss portion has a density less than the density of the outer portion;
- forming a second powdered metal preform;
- assembling the first powdered metal preform with the second powdered metal preform so that the boss portion cooperates with the second powdered metal preform to fix the first and second powdered metal preforms against rotation relative to each other; and
- sintering the first and second powdered metal preforms to join them together.
- 2. The method of claim 1 wherein the first powdered metal preform is formed in the shape of a lobe.
- 3. The method of claim 1 wherein the boss portion has a non-circular periphery.
- 4. The method of claim 1 further comprising assembling the first and second powdered metal preforms onto a shaft.
- 5. The method of claim 1 wherein the first powdered metal preform includes a first powdered metal, the second powdered metal preform includes a second powdered metal, and the first powdered metal is different than the second powdered metal.
Parent Case Info
This application is a divisional of application Ser. No. 08/018,079 filed on Feb. 16, 1993, now U.S. Pat. No. 5,293,847.
US Referenced Citations (7)
Foreign Referenced Citations (2)
Number |
Date |
Country |
157929 |
Dec 1981 |
JPX |
1719185 |
Mar 1992 |
SUX |
Non-Patent Literature Citations (1)
Entry |
"Powder Metallurgy Design Manual" Metal Powder Industries Federation, Princeton, N.J., 1989, pp. 1-6, 34 41 & 73. |
Divisions (1)
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Number |
Date |
Country |
Parent |
18079 |
Feb 1993 |
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