JPH0381080A - Concrete cutting device utilizing laser beam - Google Patents

Concrete cutting device utilizing laser beam

Info

Publication number
JPH0381080A
JPH0381080A JP21753089A JP21753089A JPH0381080A JP H0381080 A JPH0381080 A JP H0381080A JP 21753089 A JP21753089 A JP 21753089A JP 21753089 A JP21753089 A JP 21753089A JP H0381080 A JPH0381080 A JP H0381080A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
laser beam
concrete
cutting
opening angle
cutting device
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
JP21753089A
Inventor
Hiroshi Nojima
Hideaki Saito
Shibakumaran Uigunaraajiya
Original Assignee
Fujita Corp
Sangyo Souzou Kenkyusho
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

Links

Abstract

PURPOSE:To maximize a cutting depth and to surely cut concrete by making an irradiation opening angle of a laser beam focus part of object concrete to be cut to a limited angle to constitute a cutting head. CONSTITUTION:A laser beam converging system where the irradiation opening angle of the laser beam focus part of a laser beam 1 is limited to 2 - 4 deg. is used to adjust the focus 2 on the surface or the inside slightly from the surface of the concrete C and cutting is carried out. At this time, repeated phenomenons of melting, oxidation, an evaporation phenomenon, and further, absorption, reflection and transmission of heat energy in a cutting groove 3 can be led to the maximum efficiency by limiting the focus part opening angle to the range of 2 - 4 deg..
JP21753089A 1989-08-25 1989-08-25 Concrete cutting device utilizing laser beam Pending JPH0381080A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21753089A JPH0381080A (en) 1989-08-25 1989-08-25 Concrete cutting device utilizing laser beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21753089A JPH0381080A (en) 1989-08-25 1989-08-25 Concrete cutting device utilizing laser beam

Publications (1)

Publication Number Publication Date
JPH0381080A true true JPH0381080A (en) 1991-04-05

Family

ID=16705693

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21753089A Pending JPH0381080A (en) 1989-08-25 1989-08-25 Concrete cutting device utilizing laser beam

Country Status (1)

Country Link
JP (1) JPH0381080A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5496985A (en) * 1994-04-01 1996-03-05 Xerox Corporation Laser ablation nozzle
EP1485569A2 (en) * 2002-02-20 2004-12-15 Loma Linda University Medical Center Method for retrofitting concrete structures
US7038166B2 (en) 2003-03-18 2006-05-02 Loma Linda University Medical Center Containment plenum for laser irradiation and removal of material from a surface of a structure
US7038164B2 (en) 2003-03-18 2006-05-02 Loma Linda University Medical Center Laser head for irradiation and removal of material from a surface of a structure
US7057134B2 (en) 2003-03-18 2006-06-06 Loma Linda University Medical Center Laser manipulation system for controllably moving a laser head for irradiation and removal of material from a surface of a structure
US7060932B2 (en) 2003-03-18 2006-06-13 Loma Linda University Medical Center Method and apparatus for material processing
US7286223B2 (en) 2003-03-18 2007-10-23 Loma Linda University Medical Center Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light
US7379483B2 (en) 2003-03-18 2008-05-27 Loma Linda University Medical Center Method and apparatus for material processing
CN102808526A (en) * 2011-06-01 2012-12-05 永升建设集团有限公司 Nondestructive demolition construction method of reinforced concrete frame beam

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62179884A (en) * 1986-02-04 1987-08-07 Fujita Corp Method and device for cutting structure
JPS6356378A (en) * 1986-08-26 1988-03-10 Ohbayashigumi Ltd Method for melt cutting of concrete by laser beam
JPS6397391A (en) * 1986-10-13 1988-04-28 Ohbayashigumi Ltd Fusion cutting method for concrete by laser beam

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62179884A (en) * 1986-02-04 1987-08-07 Fujita Corp Method and device for cutting structure
JPS6356378A (en) * 1986-08-26 1988-03-10 Ohbayashigumi Ltd Method for melt cutting of concrete by laser beam
JPS6397391A (en) * 1986-10-13 1988-04-28 Ohbayashigumi Ltd Fusion cutting method for concrete by laser beam

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5496985A (en) * 1994-04-01 1996-03-05 Xerox Corporation Laser ablation nozzle
US7180080B2 (en) 2002-02-20 2007-02-20 Loma Linda University Medical Center Method for retrofitting concrete structures
EP1485569A2 (en) * 2002-02-20 2004-12-15 Loma Linda University Medical Center Method for retrofitting concrete structures
EP1485569A4 (en) * 2002-02-20 2005-05-11 Univ Loma Linda Med Method for retrofitting concrete structures
US7491950B2 (en) 2002-02-20 2009-02-17 Loma Linda University Medical Center Method for retrofitting concrete structures
US7286223B2 (en) 2003-03-18 2007-10-23 Loma Linda University Medical Center Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light
US7060932B2 (en) 2003-03-18 2006-06-13 Loma Linda University Medical Center Method and apparatus for material processing
US7180920B2 (en) 2003-03-18 2007-02-20 Loma Linda University Medical Center Method and apparatus for material processing
US7057134B2 (en) 2003-03-18 2006-06-06 Loma Linda University Medical Center Laser manipulation system for controllably moving a laser head for irradiation and removal of material from a surface of a structure
US7038164B2 (en) 2003-03-18 2006-05-02 Loma Linda University Medical Center Laser head for irradiation and removal of material from a surface of a structure
US7289206B2 (en) 2003-03-18 2007-10-30 Loma Linda University Medical Center Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light
US7379483B2 (en) 2003-03-18 2008-05-27 Loma Linda University Medical Center Method and apparatus for material processing
US7492453B2 (en) 2003-03-18 2009-02-17 Loma Linda University Medical Center Method and apparatus for detecting embedded material within an interaction region of a structure
US7038166B2 (en) 2003-03-18 2006-05-02 Loma Linda University Medical Center Containment plenum for laser irradiation and removal of material from a surface of a structure
US7620085B2 (en) 2003-03-18 2009-11-17 Loma Linda University Medical Center Method and apparatus for material processing
US7880114B2 (en) 2003-03-18 2011-02-01 Loma Linda University Medical Center Method and apparatus for material processing
US7880116B2 (en) 2003-03-18 2011-02-01 Loma Linda University Medical Center Laser head for irradiation and removal of material from a surface of a structure
US8258425B2 (en) 2003-03-18 2012-09-04 Loma Linda University Medical Center Laser head for irradiation and removal of material from a surface of a structure
CN102808526A (en) * 2011-06-01 2012-12-05 永升建设集团有限公司 Nondestructive demolition construction method of reinforced concrete frame beam

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