JPS55106648A - Cross rolling working method and die for cross rolling working - Google Patents
Cross rolling working method and die for cross rolling workingInfo
- Publication number
- JPS55106648A JPS55106648A JP1372279A JP1372279A JPS55106648A JP S55106648 A JPS55106648 A JP S55106648A JP 1372279 A JP1372279 A JP 1372279A JP 1372279 A JP1372279 A JP 1372279A JP S55106648 A JPS55106648 A JP S55106648A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- cross rolling
- rolling working
- diameter
- subsequent steps
- 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
Landscapes
- Forging (AREA)
Abstract
PURPOSE: To prevent the bending of shaft part and the occurrence of Mannesmann hole and improve yield by making the ratio of blank diameter and the shaft diameter of the first step to the specific ratio and specifying the reduction ratio of the shaft after the second and subsequent steps.
CONSTITUTION: If the blank diameter is let d0 and the shaft diameter of the first step d1 in the cross rolling working method which builds up and roll works the stepped shaft form part, then the head parts are build-up worked simultaneously while it is formed down to d1=(0.5W0.5)d0. Thence, if the shaft diameter of the second and subsequent steps is let dm(the second step is d2, the third step is d3... and these are generalized to dm), then the shaft dm of the second and subsequent steps is formed always to reduction ratio 1-dm/d1≥0.15 (i.e., dm/ d1≤0.85). This makes the occurrence of Mannesmann hole difficult and improves the yield of material.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1372279A JPS55106648A (en) | 1979-02-08 | 1979-02-08 | Cross rolling working method and die for cross rolling working |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1372279A JPS55106648A (en) | 1979-02-08 | 1979-02-08 | Cross rolling working method and die for cross rolling working |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55106648A true JPS55106648A (en) | 1980-08-15 |
JPS57134B2 JPS57134B2 (en) | 1982-01-05 |
Family
ID=11841130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1372279A Granted JPS55106648A (en) | 1979-02-08 | 1979-02-08 | Cross rolling working method and die for cross rolling working |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55106648A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020006434A (en) * | 2018-06-28 | 2020-01-16 | 日本製鉄株式会社 | Prediction method for occurrence of inner crack |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61109938U (en) * | 1984-12-22 | 1986-07-11 | ||
JPH0492412U (en) * | 1990-12-27 | 1992-08-12 |
-
1979
- 1979-02-08 JP JP1372279A patent/JPS55106648A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020006434A (en) * | 2018-06-28 | 2020-01-16 | 日本製鉄株式会社 | Prediction method for occurrence of inner crack |
Also Published As
Publication number | Publication date |
---|---|
JPS57134B2 (en) | 1982-01-05 |
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