TOOTH-FORM ROLLER FOR FORM ROLLING

PROBLEM TO BE SOLVED: To improve durability of a tooth-form roller for form rolling by forming the tooth-form roller for form rolling, as a double structure of a low hardness high toughness material in the inner layer and a high hardness low toughness material in the outer layer. SOLUTION: On the ou...

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Bibliographische Detailangaben
Hauptverfasser:	HAMAZAKI KEIICHI, NISHIMURA FUMITAKA, SASANO HIDESHI
Format:	Patent
Sprache:	eng
Schlagworte:	BEARINGS BLASTING CASTING CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINE TOOLS MAKING METALLIC POWDER MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS,WHEELS, RINGS, BARRELS, BALLS MANUFACTURE OF ARTICLES FROM METALLIC POWDER MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS POWDER METALLURGY PUNCHING METAL ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS SOLDERING OR UNSOLDERING THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WELDING WORKING BY LASER BEAM WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To improve durability of a tooth-form roller for form rolling by forming the tooth-form roller for form rolling, as a double structure of a low hardness high toughness material in the inner layer and a high hardness low toughness material in the outer layer. SOLUTION: On the outer peripheral surface of a cylindrical roller body 2, an involute shaped tooth-form 3 is formed to make the tooth-form roller 1 for a form roller. The roller body 2 and an inner layer 4 are formed with the material having low hardness and high toughness, such an alloy tool steel. The outer layer 5 as the surface layer of the inner layer 4 is formed with a material having high hardness and low toughness, such as high speed tool steel. The boundary part 6 between the inner layer 4 and the outer layer 5 is positioned at ±m/2 ((m) is module), by using a pitch circle diameter P of the tooth-form 3 as the reference. It is desirable to diffusion-weld the outer layer 5, composed of a sintered alloy around the inner layer 4 composed of the tool steel through an HIP treatment. The inner layer 4 is cut to a prescribed shape and held into a vessel, and the alloy powder for the outer layer 5 is filled around the inner layer 4 and charged into an HIP furnace to execute a heating-pressurized treatment. The treating condition in the HIP furnace is desirably at 1,100 deg.C and about 1,000 atm.