JPS6469416A - Method for producing screw with antiwear property to earth and sand - Google Patents

Method for producing screw with antiwear property to earth and sand

Info

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
Application number
JP22413787A
Other languages
Japanese (ja)
Inventor
Akira Sui
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP22413787A priority Critical patent/JPS6469416A/en
Publication of JPS6469416A publication Critical patent/JPS6469416A/en
Pending legal-status Critical Current

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 Both screws 1, 2 are welded integrally with each other on portions where earth and sand slide and then the mandrel is withdrawn.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.
JP22413787A 1987-09-09 1987-09-09 Method for producing screw with antiwear property to earth and sand Pending JPS6469416A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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