JPS6469416A - Method for producing screw with antiwear property to earth and sand - Google Patents
Method for producing screw with antiwear property to earth and sandInfo
- Publication number
- JPS6469416A JPS6469416A JP22413787A JP22413787A JPS6469416A JP S6469416 A JPS6469416 A JP S6469416A JP 22413787 A JP22413787 A JP 22413787A JP 22413787 A JP22413787 A JP 22413787A JP S6469416 A JPS6469416 A JP S6469416A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- earth
- sand
- screws
- yield
- 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
- Screw Conveyors (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
PURPOSE:To improve the yield of material and reduce man-hours in the above- captioned screw for ground boring equipment by winding a plurality of layers of different quality square steel materials spirally around a rotatable mandrel to weld them integrally with each other. CONSTITUTION:A high hardness long square material is wound spirally around a rotatable mandrel in hot working to form a inner diameter side screw 2. Then, a hard square steel material is wound around said screw to form a outer diameter side screw 1. Both screws 1, 2 are welded integrally with each other on portions where earth and sand slide and then the mandrel is withdrawn. Further, both screws are inserted into an outer pipe and welded to the inner surface of pipe to provide an outer pipe type boring screw. Thus, the yield of material is improved and man-hours are reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22413787A JPS6469416A (en) | 1987-09-09 | 1987-09-09 | Method for producing screw with antiwear property to earth and sand |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22413787A JPS6469416A (en) | 1987-09-09 | 1987-09-09 | Method for producing screw with antiwear property to earth and sand |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6469416A true JPS6469416A (en) | 1989-03-15 |
Family
ID=16809127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22413787A Pending JPS6469416A (en) | 1987-09-09 | 1987-09-09 | Method for producing screw with antiwear property to earth and sand |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6469416A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09150933A (en) * | 1995-11-30 | 1997-06-10 | Sumitomo Coal Mining Co Ltd | Transfer screw blade |
JP2010503592A (en) * | 2006-09-13 | 2010-02-04 | シュトリッカー−イーエルデー・パテント・ゲゼルシャフト・ビュルガーリッヒェン・レヒツ | Method and blank for manufacturing screw pipe conveyor, and screw pipe conveyor manufactured using them |
-
1987
- 1987-09-09 JP JP22413787A patent/JPS6469416A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09150933A (en) * | 1995-11-30 | 1997-06-10 | Sumitomo Coal Mining Co Ltd | Transfer screw blade |
JP2010503592A (en) * | 2006-09-13 | 2010-02-04 | シュトリッカー−イーエルデー・パテント・ゲゼルシャフト・ビュルガーリッヒェン・レヒツ | Method and blank for manufacturing screw pipe conveyor, and screw pipe conveyor manufactured using them |
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