JPS56134137A - Manufacture of plunger for valve rush adjuster - Google Patents
Manufacture of plunger for valve rush adjusterInfo
- Publication number
- JPS56134137A JPS56134137A JP3435780A JP3435780A JPS56134137A JP S56134137 A JPS56134137 A JP S56134137A JP 3435780 A JP3435780 A JP 3435780A JP 3435780 A JP3435780 A JP 3435780A JP S56134137 A JPS56134137 A JP S56134137A
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- cylinder
- plunger
- lightweight
- life
- 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
Links
Abstract
PURPOSE: To eliminate the need for step-cutting and polishing of the cut surface of a plunger for a valve rush adjuster and make it lightweight as well as prolong the life of a punching tool by utilizing drawing.
CONSTITUTION: A hole 3 is made, by punching, in the center of the bottom 1 of a cylinder 2 having a bottom at one end and which is formed by extrusion or cutting. Then, the other end is drawn in order to form the cylinder 2 into a step shape having a tapered shoulder 7 of tapering angle α 20W60°. In this case, the surface roughness of the drawn part 8 of the cylinder is more excellent than that of the cut surface. Then, the end surface and the adjacent circumferential surface are finished into an inverted cone shape 5 by cutting or plastic working. Finally, cold working is applied to form a spherical surface with a hole 9 provided at the tip. It is unnecessary to polish the spherical surface 6 moreover. Because the body becomes thinner as a whole, it is lightweight, and the life of the punching tool is prolonged.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3435780A JPS56134137A (en) | 1980-03-17 | 1980-03-17 | Manufacture of plunger for valve rush adjuster |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3435780A JPS56134137A (en) | 1980-03-17 | 1980-03-17 | Manufacture of plunger for valve rush adjuster |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56134137A true JPS56134137A (en) | 1981-10-20 |
JPS5746977B2 JPS5746977B2 (en) | 1982-10-06 |
Family
ID=12411902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3435780A Granted JPS56134137A (en) | 1980-03-17 | 1980-03-17 | Manufacture of plunger for valve rush adjuster |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56134137A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0325252Y2 (en) * | 1985-01-16 | 1991-05-31 |
-
1980
- 1980-03-17 JP JP3435780A patent/JPS56134137A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5746977B2 (en) | 1982-10-06 |
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