Nisshin Steel Co., Ltd.

Nippon Steel Nisshin Co., Ltd.

Nippon Tungsten Co., Ltd.

Nippon Steel Corporation

Jun Kurobe

Naofumi Nakamura

Yudai Yamamoto

Hirokazu Sasaki

Ryuji Tanoue

Hiroshi Asada

Norimasa Miura

Akihiro Ando

Katsunari Norita

Kazuhiro Takagi

Kenji Hara

Kenji Okamura

Shigeo Matsubara

Shuichi Teramoto

Shinobu Karino

Masayuki Ishihara

Shingo Mukae

Shouji Inoue

A formed material manufacturing method according to present invention includes the steps of forming a convex formed portion by performing at least one forming process on a surface treated metal plate, and performing ironing on the formed portion using an ironing mold after forming the formed portion. The ironing mold includes a punch that is inserted into the formed portion, and a die having a pushing hole into which the formed portion is pushed together with the punch. An inner peripheral surface of the pushing hole extends non-parallel to an outer peripheral surface of the punch, and the inner peripheral surface is provided with a clearance that corresponds to an uneven plate thickness distribution, in the pushing direction, of the formed portion prior to the ironing relative to the outer peripheral surface to ensure that an amount of ironing applied to the formed portion remains constant in the pushing direction.

Formed material manufacturing method and surface treated metal plate used in same

A lithium-ion secondary-battery case that allows bonding without weld spatter and has high strength against external force acting on the battery case, and a method for manufacturing the lithium-ion secondary-battery case are provided. Specifically, an austenitic stainless steel foil is used for a cup component (), and a two-phase stainless steel having an austenite transformation start temperature Ain a temperature increase process at 650&#xb0; C. to 950&#xb0; C. and an austenite and ferrite two-phase temperature range of 880&#xb0; C. and higher, is used for a cover component (), and the diffusion bonding is proceeded while accompanied by grain boundary movement upon transformation of the two-phase steel from a ferrite phase into an austenite phase within a heating temperature range of 880&#xb0; C. to 1080&#xb0; C.

Lithium-ion secondary-battery case and manufacturing method therefor

The present invention suppresses deterioration in the corrosion resistance of a worked portion resulting from working cracks in a Zn-based plated layer () in a workpiece () formed into a predetermined shape by performing plastic working on a Zn-based plated steel sheet () coated with a Zn-containing metal as a raw material. That is, plastic working is performed on a raw material that is a Zn-based plated steel sheet () to obtain a workpiece () having a predetermined shape, and thereafter, pressurization processing is performed on a worked portion in a sheet thickness direction to deform the plated metal, thus decreasing the width of working cracks in the plated metal. Accordingly, it is possible to reduce the deterioration in the corrosion resistance of the worked portion of the Zn-based plated workpiece.

Method for processing galvanized component

A method of manufacturing a rectangular tube having a stepped portion includes: forming V-shaped grooves on a rectangular tube at surfaces of an end thereof in a direction parallel to a longitudinal direction thereof; and pressing each of the surfaces having the V-shaped grooves formed thereon with a rotating roll from outside to inside, whereby the end of the rectangular tube is radially reduced.

Method of manufacturing rectangular tube having stepped portion

A method of manufacturing a rectangular tube having a stepped portion includes: forming V-shaped grooves on a rectangular tube at surfaces of an end thereof in a direction parallel to a longitudinal direction thereof; and pressing each of the surfaces having the V-shaped grooves formed thereon from outside to inside, whereby the end of the rectangular tube is radially reduced.

An ironing mold according to the present invention is provided with a punch, and a die which forms a pushing hole with respect to the punch. When the skewness Rsk of a surface treated metal plate is less than &#x2212;0.6 and no less than &#x2212;1.3, then the curvature radius of a shoulder portion of the die and a clearance between a radius end and the punch are determined such that Y, which is expressed by {(t&#x2212;c)/t}&#xd7;100, and X, which is expressed by r/t, satisfy 0&#x3c;Y&#x2266;18.7X&#x2212;6.1, X satisfies X&#x2267;0.6 and r satisfies r&#x2266;0.5 h.

Ironing mold and formed material manufacturing method

A formed material is manufactured by performing forming including at least one drawing-out process and at least one drawing process performed after the drawing-out process. A punchused in the drawing-out process is formed to be wider on a rear end side than on a tip end side. By pushing a raw material metal plate into a pushing holetogether with the punch, ironing is performed on a region of the raw material metal plate corresponding to a flange portion.

Formed material manufacturing method and formed material

An ironing mold according to the present invention includes a punch that is inserted into a formed portion, and a die having a pushing hole into which the formed portion is pushed together with the punch. An inner peripheral surface extends non-parallel to an outer peripheral surface of the punch, and the inner peripheral surface is provided with a clearance that corresponds to an uneven plate thickness distribution, in the pushing direction, of the formed portion prior to the ironing relative to the outer peripheral surface to ensure that an amount of ironing applied to the formed portion remains constant in the pushing direction.

Provided is a spinning method of reducing a diameter of a work piece pipe body with processing rollers disposed on an outer surface of the work piece pipe body, the processing rollers being configured to be relatively revolved around the work piece pipe body, wherein, when the processing rollers are axially reciprocated while being moved in a radius direction of the work piece pipe body, wherein the diameter reducing process with the processing rollers is performed under a state in which a wound body formed of an elastic sheet-like material is inserted as a core body into the inside of a portion of the work piece pipe body to be subjected to the diameter reducing processing.

Spinning method for forming a diameter reduced portion

Provided is an electrode () which has a double structure including Cu or a Cu alloy as an electrode body () and a core material () made of W, Mo, a W-based alloy, or a Mo-based alloy embedded in a surface of the electrode body () which is abutted against a material to be welded, the core material () being formed by using W, Mo, the W-based alloy, or the Mo-based alloy which is in the form of a fibrous structure extended by sintering, swaging, and annealing in an electrode axis direction, the fibrous structure having a horizontal cross-sectional average particle diameter of 50 &#x3bc;m or more and an aspect ratio of 1.5 or more. The electrode () can be used as an inexpensive electrode obtained by suppressing particle dropping/attrition and defects in electrodes for spot welding, in which heat and pressure are applied repeatedly, stably enhancing durability.

Electrode for spot welding

A method for making sectionally deformed band plate feeds by cold-rolling metal band plate feeds between work rolls wherein at least one of the work rolls has a barrel provided with a circumferential groove, a plurality of metal band plate feeds with substantially equal resistance to deformation, while overlaid one upon another, are rolled together between the work rolls to a reduction ratio of 30% or lower at one feeding operation, and the resulting metal band plate feeds are separated from each other.

Growing community of inventors

Sakai, Japan

Jun Kurobe