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JPS5711731A - Production of curved boom - Google Patents

Production of curved boom

Info

Publication number
JPS5711731A
JPS5711731A JP8523880A JP8523880A JPS5711731A JP S5711731 A JPS5711731 A JP S5711731A JP 8523880 A JP8523880 A JP 8523880A JP 8523880 A JP8523880 A JP 8523880A JP S5711731 A JPS5711731 A JP S5711731A
Authority
JP
Japan
Prior art keywords
roll
members
side walls
welding
contacting
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
JP8523880A
Other languages
Japanese (ja)
Inventor
Yoshimichi Takemoto
Nobuyoshi Masumoto
Shohei Kusada
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 JP8523880A priority Critical patent/JPS5711731A/en
Publication of JPS5711731A publication Critical patent/JPS5711731A/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

PURPOSE: To decrease welding areas and to reduce weight by permitting production of a boom which is curved in the intermediate part and is used for hydraulic excavators and the like through opposite welding of two pieces of U-shaped materials over the entire length.
CONSTITUTION: An outer bent member 2 and an inner bent member 3 whech are beforehand formed into a U shape in section and into a linear shape are curved respectively outward and inward by means of roll benders 8a, 8b for outward bending and inward bending which respectively consist of at least one piece of a top roll 6 and at least two pieces of bottom rolls 7, 7 opposite thereto, and of both rolls whereof the roll on the side rollably contacting to the outer side of the webs of both members 2, 3 is provided with flanges 9, 9 silidingly contacting to the outer side surfaces on both sides in the root parts of both side walls of the respective members 2, 3, and the roll rollably contacting to the inner side of the webs is provided with grooves 10, 10 fitted with the leading end parts on both side walls of the respective members 2, 3. The respective end parts of both side walls of both members 2, 3 are opposed to each other and are coupled by welding.
COPYRIGHT: (C)1982,JPO&Japio
JP8523880A 1980-06-25 1980-06-25 Production of curved boom Pending JPS5711731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8523880A JPS5711731A (en) 1980-06-25 1980-06-25 Production of curved boom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8523880A JPS5711731A (en) 1980-06-25 1980-06-25 Production of curved boom

Publications (1)

Publication Number Publication Date
JPS5711731A true JPS5711731A (en) 1982-01-21

Family

ID=13852974

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8523880A Pending JPS5711731A (en) 1980-06-25 1980-06-25 Production of curved boom

Country Status (1)

Country Link
JP (1) JPS5711731A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63140726A (en) * 1986-12-04 1988-06-13 Ishikawajima Kenki Kk Preparation of boom for hydraulic shovel
EP1387012A2 (en) * 2002-08-02 2004-02-04 Kobelco Construction Machinery Co., Ltd. Boom structure of construction machine and manufacturing method
US6769597B1 (en) 2000-08-29 2004-08-03 Miharu Co., Ltd. Bent work and bending method and bending device used therefor
JP2013544651A (en) * 2010-10-22 2013-12-19 シリル バス カンパニー Structural parts and manufacturing method
WO2022172950A1 (en) * 2021-02-09 2022-08-18 川崎重工業株式会社 Roll molded component manufacturing device and manufacturing method
WO2022180160A1 (en) * 2021-02-26 2022-09-01 Putzmeister Engineering Gmbh Boom-arm segment and method for producing a boom-arm segment

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5481156A (en) * 1977-12-13 1979-06-28 Sumitomo Metal Ind Ltd Manufacture of welded box-shaped steel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5481156A (en) * 1977-12-13 1979-06-28 Sumitomo Metal Ind Ltd Manufacture of welded box-shaped steel

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63140726A (en) * 1986-12-04 1988-06-13 Ishikawajima Kenki Kk Preparation of boom for hydraulic shovel
US6769597B1 (en) 2000-08-29 2004-08-03 Miharu Co., Ltd. Bent work and bending method and bending device used therefor
EP1387012A2 (en) * 2002-08-02 2004-02-04 Kobelco Construction Machinery Co., Ltd. Boom structure of construction machine and manufacturing method
EP1387012A3 (en) * 2002-08-02 2004-04-07 Kobelco Construction Machinery Co., Ltd. Boom structure of construction machine and manufacturing method
JP2013544651A (en) * 2010-10-22 2013-12-19 シリル バス カンパニー Structural parts and manufacturing method
US9468962B2 (en) 2010-10-22 2016-10-18 Cyril Bath Company Structural component and method of manufacture
JP2017127906A (en) * 2010-10-22 2017-07-27 シリル バス カンパニー Structure part and manufacturing method
WO2022172950A1 (en) * 2021-02-09 2022-08-18 川崎重工業株式会社 Roll molded component manufacturing device and manufacturing method
WO2022180160A1 (en) * 2021-02-26 2022-09-01 Putzmeister Engineering Gmbh Boom-arm segment and method for producing a boom-arm segment

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