Invention Grant
- Patent Title: Method for producing ultra thin wall metallic tube by cold rolling method
- Patent Title (中): 冷轧法生产超薄壁金属管的方法
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Application No.: US12253760Application Date: 2008-10-17
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Publication No.: US07992417B2Publication Date: 2011-08-09
- Inventor: Chihiro Hayashi
- Applicant: Chihiro Hayashi
- Applicant Address: JP Osaka-shi
- Assignee: Sumitomo Metal Industries, Ltd.
- Current Assignee: Sumitomo Metal Industries, Ltd.
- Current Assignee Address: JP Osaka-shi
- Agency: Marshall, Gerstein & Borun LLP
- Main IPC: B21B17/10
- IPC: B21B17/10

Abstract:
An aspect of the present invention provides a method for producing an ultra thin wall metallic tube by a cold rolling method with significant wall thickness reduction. In a method for producing the metallic tube with a cold pilger mill, a wall thickness is reduced to perform elongation while a wall thickness center diameter is expanded using a pair of rolls, which has a tapered groove die whose diameter is gradually expanded or reduced from an engaging inlet side of the roll toward a finishing outlet side thereof, and a tapered mandrel bar, whose diameter is gradually expanded from an engaging inlet side of the tapered mandrel bar toward a finishing outlet side thereof.
Public/Granted literature
- US20090145193A1 METHOD FOR PRODUCING ULTRA THIN WALL METALLIC TUBE BY COLD ROLLING METHOD Public/Granted day:2009-06-11
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