JPS5764433A - Method for forming spring of steel wire covered with fluoroplastics - Google Patents
Method for forming spring of steel wire covered with fluoroplasticsInfo
- Publication number
- JPS5764433A JPS5764433A JP13915180A JP13915180A JPS5764433A JP S5764433 A JPS5764433 A JP S5764433A JP 13915180 A JP13915180 A JP 13915180A JP 13915180 A JP13915180 A JP 13915180A JP S5764433 A JPS5764433 A JP S5764433A
- Authority
- JP
- Japan
- Prior art keywords
- steel wire
- knocking
- length
- channel
- fluoroplastics
- 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
Landscapes
- Springs (AREA)
- Wire Processing (AREA)
Abstract
PURPOSE: To prevent a defect, such as exfoliations of a covering film, breakage of the covering film, etc., at the time of coiling and to form a spring with an excellent corrosion resistance and heat resisting property after the spring is formed, by using a knocking pin of the specified shape and dimension for the automatic coiling machine.
CONSTITUTION: An automatic coiling machine 6 is provided with a mandrel 7 and a knocking pin 8, and forms coiled springs by knocking the knocking pin 8 against a steel wire 1 advancing along the mandrel 7. This knocking pin 8 is constituted to have a curved surface whose diameter is equal to that of the coil D, and an arc channel having a cross section whose diameter is euqal to the diameter (d) of the steel wire in the curved surface, and moreover, when the length of the arc of the cross section of the channel is expressed as πD/K1 and the length of the channel in the direction of the length is expressed as πD/K2, both of them satisfy the following relationship: K1K2<0.94σfD/d, where K1 and K2 are coefficients and σf is the compressive strength (kg/mm2) of the fluoroplastics.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13915180A JPS5764433A (en) | 1980-10-04 | 1980-10-04 | Method for forming spring of steel wire covered with fluoroplastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13915180A JPS5764433A (en) | 1980-10-04 | 1980-10-04 | Method for forming spring of steel wire covered with fluoroplastics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5764433A true JPS5764433A (en) | 1982-04-19 |
Family
ID=15238744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13915180A Pending JPS5764433A (en) | 1980-10-04 | 1980-10-04 | Method for forming spring of steel wire covered with fluoroplastics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5764433A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6069840U (en) * | 1983-10-19 | 1985-05-17 | 株式会社日本気化器製作所 | spring |
| JPH0220635A (en) * | 1988-07-08 | 1990-01-24 | Nippon Fuiidaa Kogyo Kk | Anticorrosive coil spring and its manufacture |
| JP2007247823A (en) * | 2006-03-17 | 2007-09-27 | Rinnai Corp | Pilot operated water solenoid valve |
-
1980
- 1980-10-04 JP JP13915180A patent/JPS5764433A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6069840U (en) * | 1983-10-19 | 1985-05-17 | 株式会社日本気化器製作所 | spring |
| JPH0220635A (en) * | 1988-07-08 | 1990-01-24 | Nippon Fuiidaa Kogyo Kk | Anticorrosive coil spring and its manufacture |
| JP2007247823A (en) * | 2006-03-17 | 2007-09-27 | Rinnai Corp | Pilot operated water solenoid valve |
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