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81. 发明专利

JPH0274332A WELDABLE VIBRATION-DAMPING STEEL PLATE 失效
公开(公告)号：JPH0274332A
公开(公告)日：1990-03-14
申请号：JP22788088
申请日：1988-09-12
申请人： NISSHIN STEEL CO LTD
发明人： WAKABAYASHI KOJI , INOUE SHOJI , TAKEZOE AKINOBU
IPC分类号： F16F7/00 , B32B15/06 , B32B15/08
摘要： PURPOSE:To reduce the occurrence of a circumferential cut on the occasion of spot welding, by reducing the amount of deposition of plating of a skin plated steel plate of a vibration- damping steel plate on the core material side or by making said amount zero on the core material side. CONSTITUTION:An electrification circuit of a core material of a weldable vibration-damping steel plate is formed of a conductive filler, and the contact of this conductive filler with a skin plate layer is made by a spot contact in some cases. When electrification is made in these cases, a current concentrates on the part of the contact and a resistance heat is generated considerably in the part. Although the plated layer is evaporated and removed by this resistance heat, a large vacancy is formed thereby when the amount of deposition of plating is large. It expands to a surface contact around it and breaks also an electrification circuit of the surface contact, and thereby the current flowing through the core material is restricted. When the amount of deposition of plating of the skin plated layer being in contact with the core material is small, to the contrary, the removal of the plated layer in the part of the spot contact does not expand to the surface contact around it even when said layer is evaporated and removed. Therefore the amount of the current flowing in the direction of the core material is not reduced so much and a circumferential cut does not occur. In this constitution, accordingly, it is preferable that the amount of deposition of plating on the core material side is reduced to 10g/m or below or zero.

82. 发明专利

JPS6458351A SUBSTRATE FOR CATALYST CARRIER 失效
公开(公告)号：JPS6458351A
公开(公告)日：1989-03-06
申请号：JP21301987
申请日：1987-08-28
申请人： NISSHIN STEEL CO LTD
发明人： INOUE SHOJI , TAKEZOE AKINOBU , ANDO ATSUSHI
IPC分类号： B01J23/86 , B01J32/00 , B01J37/02
摘要： PURPOSE:To improve bonding and heat resistant properties of an aluminum layer by applying gamma-Al2O3 on alpha-Al2O3 whisker formed on an Al layer by means of heating a clad material constituted of laminated Al sheets on the surface of steel. CONSTITUTION:Al sheets are laminated on one surface or both surfaces of stainless steel and pressure welded under the condition or room temperature of -60 deg.C and total pressure rate of 10-70% to form a clad material. A substrate for catalyst carrier is prepared by applying gamma-Al2O3 on alpha-Al2O3 whisker after said alpha-Al2O3 whisker is formed on an aluminum layer by heating said clad material. Stainless steel containing 3-30wt.% of Cr, 0.2wt.% or less of carbon, 2wt.% or less of Mn and 5wt.% or less of Si and containing iron and impurities for the rest part is suitable. Said stainless steel containing 1wt.% or less of one kind of more of Ti, Nb, V and Zr can also be used.

83. 发明专利

JPS6448624A BENDING METHOD FOR METALLIC SHEET 失效
公开(公告)号：JPS6448624A
公开(公告)日：1989-02-23
申请号：JP20178787
申请日：1987-08-14
申请人： NISSHIN STEEL CO LTD
发明人： NAKAKO TAKEFUMI , TAKEZOE AKINOBU , INOUE SHOJI , MIURA NORIMASA
IPC分类号： B21D5/14 , G02F1/1335 , G02F1/13363
摘要： PURPOSE:To simplify an equipment and to reduce a manufacturing cost by providing a pair of cylindrical rolls rotating through a gap in the same direction and arranging a floating roll having a specific diametrical size to the gap. CONSTITUTION:There are arranged rolls 1, 2 having the respective axes parallel with each other and a gap G between the rolls, and rotating in the same direction. Then, there is provided a floating roll 3 parallel with the axes of the rolls 1, 2 and having a diametrical size not smaller than the value obtained when twice the thickness of a metallic sheet is subtracted from the gap G. After the metallic sheet 4 along the roll 1 on the input side is passed through the gap G between the rolls, it is bent along the roll 3 and passed again through the gap G. In this manner the metallic sheet 4 is bent by each resistance between each roll and the sheet 4 through the radius of the roll 3. Accordingly, the working equipment is simplified and the manufacturing cost is reduced.

84. 发明专利

JPS62176611A MANUFACTURE OF THIN METAL TUBE 失效
公开(公告)号：JPS62176611A
公开(公告)日：1987-08-03
申请号：JP24385586
申请日：1986-10-14
申请人： NISSHIN STEEL CO LTD
发明人： NAKAKO TAKEFUMI , INOUE SHOJI , TAKEZOE AKINOBU
IPC分类号： B21D5/12 , B21C37/08 , B21C37/083 , B21D5/00
摘要： PURPOSE:To form a high strength metal sheet into a tube having high out-of- roundness by providing a metal sheet with a pre-deformation in the width direction using a small roll and forming the tube by utilizing a residual curvature in the width direction at a position having no curvature in the longitudinal direction. CONSTITUTION:A pre-deformation device 1 is installed at the downstream side of an uncoiler 5; a small diameter bending roll 1a and a polyurethane lining roll 1b perform a plastic bending work in the width direction on a surface of a metal sheet 2 being the inner surface of a tube to give the sheet 2 pre- deformation. The sheet 2 is formed into tube by side rolls 3 and feed rolls 4 by utilizing a residual curvature in the width direction caused by the above plastic bending at the position where the distance from the roll 1a is about >=30 times the finished tube diameter and further a curvature in the longitudinal direction goes to zero, and is welded with a welding torch 6. Therefore, a tube with the high out-of-roundness is formed of even a high strength metal sheet or a material before annealing.

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