METHOD AND APPARATUS FOR MANUFACTURING STRUCTURES WITH IMPROVED FATIGUE LIFE
A method for cold working metal structures. A compound indenter is used to produce deformation in a workpiece, to provide a selected beneficial residual stress profile, to provide improved fatigue life structures with minimal manufacturing steps. A compound indenter deforms a workpiece, resulting in...
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| creator | EASTERBROOK, ERIC, T JUHLIN, NILS |
| description | A method for cold working metal structures. A compound indenter is used to produce deformation in a workpiece, to provide a selected beneficial residual stress profile, to provide improved fatigue life structures with minimal manufacturing steps. A compound indenter deforms a workpiece, resulting in dimples therein. A relatively uniform beneficial residual stress profile is provided at the surface and at the midplane of apertures in a workpiece, so as to improve overall fatigue life. A compound indenter tool having a first, elongate indenter with a shaped indenter surface portion, and a second shaped indenter surrounding the first indenter and forming an annular shoulder recessed from the surface portion of the first indenter, is used. Optionally, a foot having a bottom portion is used to confiningly surround an indenter during application of deforming force to the surface of a workpiece, to prevent deformation of adjacent workpiece surface. |
| format | Patent |
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A compound indenter is used to produce deformation in a workpiece, to provide a selected beneficial residual stress profile, to provide improved fatigue life structures with minimal manufacturing steps. A compound indenter deforms a workpiece, resulting in dimples therein. A relatively uniform beneficial residual stress profile is provided at the surface and at the midplane of apertures in a workpiece, so as to improve overall fatigue life. A compound indenter tool having a first, elongate indenter with a shaped indenter surface portion, and a second shaped indenter surrounding the first indenter and forming an annular shoulder recessed from the surface portion of the first indenter, is used. Optionally, a foot having a bottom portion is used to confiningly surround an indenter during application of deforming force to the surface of a workpiece, to prevent deformation of adjacent workpiece surface.</description><edition>7</edition><language>eng ; fre ; ger</language><subject>BLASTING ; CHEMISTRY ; COMBINED OPERATIONS ; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING ; ENGINEERING ELEMENTS AND UNITS ; FORGE FURNACES ; FORGING ; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS ; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS ; HAMMERING ; HEATING ; LIGHTING ; MACHINE TOOLS ; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS ; MECHANICAL ENGINEERING ; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL ; METAL-WORKING NOT OTHERWISE PROVIDED FOR ; METALLURGY ; METALLURGY OF IRON ; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS ; OTHER WORKING OF METAL ; PERFORMING OPERATIONS ; PRESSING METAL ; PUNCHING METAL ; RIVETING ; THERMAL INSULATION IN GENERAL ; TRANSPORTING ; UNIVERSAL MACHINE TOOLS ; WEAPONS ; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL</subject><creationdate>2006</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20060830&DB=EPODOC&CC=EP&NR=1261443A4$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20060830&DB=EPODOC&CC=EP&NR=1261443A4$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>EASTERBROOK, ERIC, T</creatorcontrib><creatorcontrib>JUHLIN, NILS</creatorcontrib><title>METHOD AND APPARATUS FOR MANUFACTURING STRUCTURES WITH IMPROVED FATIGUE LIFE</title><description>A method for cold working metal structures. A compound indenter is used to produce deformation in a workpiece, to provide a selected beneficial residual stress profile, to provide improved fatigue life structures with minimal manufacturing steps. A compound indenter deforms a workpiece, resulting in dimples therein. A relatively uniform beneficial residual stress profile is provided at the surface and at the midplane of apertures in a workpiece, so as to improve overall fatigue life. A compound indenter tool having a first, elongate indenter with a shaped indenter surface portion, and a second shaped indenter surrounding the first indenter and forming an annular shoulder recessed from the surface portion of the first indenter, is used. Optionally, a foot having a bottom portion is used to confiningly surround an indenter during application of deforming force to the surface of a workpiece, to prevent deformation of adjacent workpiece surface.</description><subject>BLASTING</subject><subject>CHEMISTRY</subject><subject>COMBINED OPERATIONS</subject><subject>DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING</subject><subject>ENGINEERING ELEMENTS AND UNITS</subject><subject>FORGE FURNACES</subject><subject>FORGING</subject><subject>GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS</subject><subject>GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS</subject><subject>HAMMERING</subject><subject>HEATING</subject><subject>LIGHTING</subject><subject>MACHINE TOOLS</subject><subject>MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS</subject><subject>MECHANICAL ENGINEERING</subject><subject>MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL</subject><subject>METAL-WORKING NOT OTHERWISE PROVIDED FOR</subject><subject>METALLURGY</subject><subject>METALLURGY OF IRON</subject><subject>MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS</subject><subject>OTHER WORKING OF METAL</subject><subject>PERFORMING OPERATIONS</subject><subject>PRESSING METAL</subject><subject>PUNCHING METAL</subject><subject>RIVETING</subject><subject>THERMAL INSULATION IN GENERAL</subject><subject>TRANSPORTING</subject><subject>UNIVERSAL MACHINE TOOLS</subject><subject>WEAPONS</subject><subject>WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2006</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZPDxdQ3x8HdRcPQD4oAAxyDHkNBgBTf_IAVfR79QN0fnkNAgTz93heCQoFAQ2zVYIdwzxEPB0zcgyD_M1UXBzTHE0z3UVcHH082Vh4E1LTGnOJUXSnMzKLi5hjh76KYW5MenFhckJqfmpZbEuwYYGpkZmpgYO5oYE6EEAIaaLdY</recordid><startdate>20060830</startdate><enddate>20060830</enddate><creator>EASTERBROOK, ERIC, T</creator><creator>JUHLIN, NILS</creator><scope>EVB</scope></search><sort><creationdate>20060830</creationdate><title>METHOD AND APPARATUS FOR MANUFACTURING STRUCTURES WITH IMPROVED FATIGUE LIFE</title><author>EASTERBROOK, ERIC, T ; JUHLIN, NILS</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP1261443A43</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2006</creationdate><topic>BLASTING</topic><topic>CHEMISTRY</topic><topic>COMBINED OPERATIONS</topic><topic>DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING</topic><topic>ENGINEERING ELEMENTS AND UNITS</topic><topic>FORGE FURNACES</topic><topic>FORGING</topic><topic>GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS</topic><topic>GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS</topic><topic>HAMMERING</topic><topic>HEATING</topic><topic>LIGHTING</topic><topic>MACHINE TOOLS</topic><topic>MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS</topic><topic>MECHANICAL ENGINEERING</topic><topic>MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL</topic><topic>METAL-WORKING NOT OTHERWISE PROVIDED FOR</topic><topic>METALLURGY</topic><topic>METALLURGY OF IRON</topic><topic>MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS</topic><topic>OTHER WORKING OF METAL</topic><topic>PERFORMING OPERATIONS</topic><topic>PRESSING METAL</topic><topic>PUNCHING METAL</topic><topic>RIVETING</topic><topic>THERMAL INSULATION IN GENERAL</topic><topic>TRANSPORTING</topic><topic>UNIVERSAL MACHINE TOOLS</topic><topic>WEAPONS</topic><topic>WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL</topic><toplevel>online_resources</toplevel><creatorcontrib>EASTERBROOK, ERIC, T</creatorcontrib><creatorcontrib>JUHLIN, NILS</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>EASTERBROOK, ERIC, T</au><au>JUHLIN, NILS</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>METHOD AND APPARATUS FOR MANUFACTURING STRUCTURES WITH IMPROVED FATIGUE LIFE</title><date>2006-08-30</date><risdate>2006</risdate><abstract>A method for cold working metal structures. A compound indenter is used to produce deformation in a workpiece, to provide a selected beneficial residual stress profile, to provide improved fatigue life structures with minimal manufacturing steps. A compound indenter deforms a workpiece, resulting in dimples therein. A relatively uniform beneficial residual stress profile is provided at the surface and at the midplane of apertures in a workpiece, so as to improve overall fatigue life. A compound indenter tool having a first, elongate indenter with a shaped indenter surface portion, and a second shaped indenter surrounding the first indenter and forming an annular shoulder recessed from the surface portion of the first indenter, is used. Optionally, a foot having a bottom portion is used to confiningly surround an indenter during application of deforming force to the surface of a workpiece, to prevent deformation of adjacent workpiece surface.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | BLASTING CHEMISTRY COMBINED OPERATIONS DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING ENGINEERING ELEMENTS AND UNITS FORGE FURNACES FORGING GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HAMMERING HEATING LIGHTING MACHINE TOOLS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS OTHER WORKING OF METAL PERFORMING OPERATIONS PRESSING METAL PUNCHING METAL RIVETING THERMAL INSULATION IN GENERAL TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL |
| title | METHOD AND APPARATUS FOR MANUFACTURING STRUCTURES WITH IMPROVED FATIGUE LIFE |
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