JPS57100816A - Manufacture of tapered rod - Google Patents
Manufacture of tapered rodInfo
- Publication number
- JPS57100816A JPS57100816A JP17627680A JP17627680A JPS57100816A JP S57100816 A JPS57100816 A JP S57100816A JP 17627680 A JP17627680 A JP 17627680A JP 17627680 A JP17627680 A JP 17627680A JP S57100816 A JPS57100816 A JP S57100816A
- Authority
- JP
- Japan
- Prior art keywords
- strain rate
- tapered rod
- stretching
- sec
- sectional area
- 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
- Metal Extraction Processes (AREA)
Abstract
PURPOSE: To obtain a tapered rod easily and efficiently without problems of breakage etc. in stretch deforming a metallic material to which temperature gradient is given by specifying working strain rate in the part of smallest diameter.
CONSTITUTION: Working strain rate ε in a part of metallic material corresponding to the minimum diameter (homogeneous maximum drawing) part of a tapered rod, usually the maximum heating temperature part, is made to 0.5W 1,000%/sec. The strain rate ε is determined by the expression[Ao: original sectional area (cm2) of the material, A: sectional area (cm2) of minimum diameter part of the taper rod after stretching, t: time (sec) of stretching]. When the strain rate is less than the lower limit, temperature gradient given in axial direction is flattened and it becomes difficult to give desired tapered form. If greater than the upper limit, heat generation due to plastic deformation becomes great, and local contraction due to local heat generation occurs, and problems of breakage can take place.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17627680A JPS57100816A (en) | 1980-12-13 | 1980-12-13 | Manufacture of tapered rod |
| FR8105035A FR2477914A1 (en) | 1980-03-17 | 1981-03-13 | METHOD AND APPARATUS FOR MANUFACTURING CONICAL RODS |
| DE19813110043 DE3110043A1 (en) | 1980-03-17 | 1981-03-16 | Method and apparatus for the production of tapered rods |
| AU72605/81A AU546759B2 (en) | 1980-07-11 | 1981-07-06 | Manufacturing tapered rods |
| AT81304219T ATE8970T1 (en) | 1980-12-11 | 1981-09-15 | METHOD AND APPARATUS FOR MANUFACTURING TAPERED RODS. |
| EP19810304219 EP0054343B1 (en) | 1980-12-11 | 1981-09-15 | Method for manufacturing tapered rods and apparatus therefor |
| US06/617,131 US4842818A (en) | 1980-03-17 | 1984-06-04 | Method for manufacturing tapered rods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17627680A JPS57100816A (en) | 1980-12-13 | 1980-12-13 | Manufacture of tapered rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57100816A true JPS57100816A (en) | 1982-06-23 |
Family
ID=16010739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17627680A Pending JPS57100816A (en) | 1980-03-17 | 1980-12-13 | Manufacture of tapered rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57100816A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5424388A (en) * | 1977-07-27 | 1979-02-23 | Hitachi Ltd | Punching processing method |
-
1980
- 1980-12-13 JP JP17627680A patent/JPS57100816A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5424388A (en) * | 1977-07-27 | 1979-02-23 | Hitachi Ltd | Punching processing method |
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