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  • 2005-2009  (9)
Source
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Stamping of One-Piece Automobile Steel Wheels from Tube (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 344 (July 2007), p. 427-433 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A multi-stage stamping process of one-piece automobile steel wheels from tubes wasdeveloped to decrease the loss of material for the blanking. In this process, the tube is nosed into acup with a central hole, and then the taper bottom and side wall of the cup are formed into disk andrim portions of the wheel, respectively. The tube is produced by bending a rectangular sheet into atube and by welding both edges of the bent sheet to prevent the loss of material for the blanking.The stamping sequence of the one-piece wheels was designed by finite element simulation. Thecentral hole of the cup was decreased to a desired diameter of the hub hole without buckling andwrinkling by a 5-stages nosing operation. The taper bottom of the cup was reversely drawn, andthen was flared without folding by 2 stages. The wall thickness of the formed wheel was thick andthin in the disk and rim portions, receptively, and thus the requirement of strength of wheels issatisfied. A one-piece wheel having a hub hole was successfully formed by the designed sequencein a miniature experiment
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.344.427.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Increase of Wall Thickness around Corner of Multi-Stage Drawn Cup with Flange Using Conical Punches (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 340-341 (June 2007), p. 761-766 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The wall thickness around an inner corner in 3-stages formed cups with a flange wasincreased by means of conical punches in the 1st and 2nd stages. Since the strength of the formedcups is greatly improved by the increase in wall thickness, the weight of the formed products isreduced by an optimum distribution obtained from the increase in wall thickness. The increase inthickness around the inner corner is obtained by compressing the side wall and conical bottom ofthe cup in the 3rd stage. As the punch angle increases, the increase in thickness at the inner cornerbecomes large. The amount of compression is expressed by a drawn volume after the 2nd stage. Amaximum 9% increase in wall thickness around the inner corner was successfully obtained for thepunch angle of 25º
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.340-341.761.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Finite Element Simulation of Self-Piercing Riveting of Three Aluminium Alloy Sheets (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 340-341 (June 2007), p. 1461-1466 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The joinability of three aluminium alloy sheets using a self-piercing rivet was evaluatedfrom a finite element simulation and experiment. The self-piercing riveting is hopeful asreplacement of spot resistance welding generally used for steel sheets, because it is not easy toapply the resistance welding to joining of three aluminium alloy sheets due to the high thermalconductivity. Defects in the riveting are categorized into the penetration through the lower sheet, thenecking of the lower sheet and the short overlap of sheets to obtain optimum joining conditions.The penetration and the necking are caused by small total thickness. The short overlap tends tooccur as the ratio of lower sheet and total thickness is small. In addition, the cross-tension test wassimulated by the finite element method to evaluate the joint strength
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.340-341.1461.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Dissimilar Metal Joining of Magnesium Alloy to Steel by FSW (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 15-17 (Feb. 2006), p. 393-397 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Authors tried to butt-weld a mild steel plate to a magnesium alloy plate by the solidstate welding using a rotating pin. This study investigated the effects of a pin rotating speed, theposition for the pin axis to be plunged (pin offset) on the strength and the microstructure of the joint.The main results obtained are as follows. Butt-welding of a steel plate to a magnesium alloy platewas easily and successfully achieved. The maximum tensile strength of a joint reached about 70%of the magnesium base metal tensile strength and the fracture path was along the joint interface.When a pin rotating speed was slow, some defects appeared in the magnesium matrix due to theinsufficient plasticization of the magnesium. The joint strength increased with the pin rotating speed.This seems to be because the plasticization of the magnesium was increased and the pressure forpushing the plasticized magnesium onto an activated faying surface of the steel increased. However,the excessive increase of the pin rotating speed caused the ignition of the magnesium, resulting inthe decrease of a joint strength. At the pin offset of 0.1mm toward steel, steel fragments scattered inthe magnesium matrix in the form of a small piece that had no influence to the joint strength. Bycontrast, larger offsets over 0.2mm produced the steel fragment continuous and parallel to the weldinterface in the magnesium matrix, and the joint strength decreased
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.15-17.393.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Optimum Design of Forming Sequence of One-Piece Automobile Steel Wheels without Welding Using Finite Element Simulation (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 340-341 (June 2007), p. 773-778 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A forming sequence of one-piece automobile steel wheels without welding was designed.In this forming process, the one-piece wheel was formed from a circular blank only by multi-stagestamping operations, and a deeply drawn cup was formed into the wheel. Two humps of the rimflange for fixing the tire were formed in the flaring and flanging stages. The humps of the rim in theopening and outer side were formed by buckling the inner flange of the rim, and by swelling the outerflange with an upper die having a short land, respectively. In addition, the number of stages wasconsiderably reduced from 16 stages to only 9 stages by combining the deep drawing and ironingstages and by adding a holding die in the flaring stages. The forming sequence of the one-piece wheelswas evaluated by both finite element simulation and miniature experiment
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.340-341.773.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Friction Stir Welding of Mg-14mass%Li Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 3838-3843 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.3838.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Joining of Aluminium Alloy and Mild Steel Sheets Using Mechanical Clinching (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 1043-1046 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The aluminium alloy and mild steel sheets were joined with mechanical clinching.Deforming behaviour of the two sheets during the clinching was observed from finite elementsimulation and an experiment to avoid defects. The fracture of the upper sheet, necking andseparation are caused by the small upper sheet thickness in the thick total thickness, the small lowersheet thickness in the thick total thickness and the small lower sheet thickness, respectively. Thejoining range for the combination of the upper aluminium alloy sheet of and the lower steel sheet ofis larger than that of the reverse combination. The effect of the difference between the flow stressesof the two sheets on the deformation behaviour was examined
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.1043.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Solid State Welding between CPTi and AZ31B Magnesium Alloy by Friction Stirring (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 3856-3862 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This paper described an experimental study on the friction stir welding of dissimilarmetal between commercially pure titanium (CPTi) and magnesium alloy AZ31B (Mg). Butt-weldsproduced at various tool rotation speeds were evaluated by the observation of the weld surfaceappearance, X-ray radiographic test, tensile test, SEM and EDX analysis. The main results obtainedare as follows. Butt-joint welding of the CPTi plate to the Mg plate was easily and successfullyachieved. The ignition of Mg occurred during welding at the tool rotation speeds over 1200rpm.The fragments of CPTi existed in a continuous form in Mg matrix. The tool rotation speed of1200rpm attained the maximum tensile strength of a joint, which was about 75% of that of Mg basemetal. Fracture occurred at the weld interface in most joint. EDX analysis revealed that Al in theMg diffused into CPTi through the weld interface and MgO existed at the interface. It seems thatthe decrease in Al concentration in the Mg and MgO formation around the weld interface caused thelow tensile strength of the joints
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.3856.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Ichthyosis bullosa of Siemens: its correct diagnosis facilitated by molecular genetic testing (2005)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 152 (2005), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Ichthyosis bullosa of Siemens (IBS, MIM 146800) is a unique congenital ichthyosis characterized by mild epidermal hyperkeratosis over flexural areas, blister formation and the development of superficially denuded areas of hyperkeratotic skin. It is clinically difficult to distinguish severe IBS from mild bullous congenital ichthyosiform erythroderma (BCIE, MIM 113800). In the current literature, 19 IBS families with keratin 2e (K2e) mutations have been reported, despite only five IBS families having been reported before the first identification of K2e mutation in 1994. We studied four patients from three Japanese IBS families. They had previously been misdiagnosed as having BCIE before the correct diagnosis was made after mutation detection. To detect the pathogenic mutations, we performed direct sequencing of the entire coding regions of KRT2E encoding K2e in the patients and healthy family members. K2e mutations, a 1469T→C transition (L490P) and a 1477G→A transition (E493K) within the conserved 2B helix termination motif of the rod domain were detected in the families and the definite diagnosis of IBS was made in the four cases. The present results indicate that IBS is not such a rare entity as was previously thought, and accurate diagnosis is now available by mutation analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2005.06598.x
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