Title:
EXTRUDING DEVICE FOR ALUMINUM MATERIAL
Document Type and Number:
Japanese Patent JP3892064
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an aluminum stock tube with extremely low defect ratio by providing a tip of a pad end shear which is formed to be projecting toward the cutting direction and whose surface opposite to the cut section has the clearance angle to the cut section.
SOLUTION: A tip of a pad end shear 5 is formed projecting toward the cutting direction, and the face of the tip opposite to the cut section has the clearance angle of about 0.1-1.5° relative to the cut section. The surface roughness of ≤100μm of the cut section after the cutting is obtained by using the pad end shear 5. The surface roughness is defined by Rmax(μ) to be judged by a surface roughness standard test piece for comparison in accordance with JIS B0659. The cut section of small surface roughness can be obtained, and the clearance of about ≥100μm by including the air on the connection surface of the cut section to the front end face is reduced.
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Inventors:
Katsuyuki Maruta
Application Number:
JP18413095A
Publication Date:
March 14, 2007
Filing Date:
July 20, 1995
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
B21C35/04; B23D35/00; G03G5/00; (IPC1-7): B23D35/00; B21C35/04
Domestic Patent References:
| JP6213688Y2 | ||||
| JP6167911U | ||||
| JP8171223A | ||||
| JP62110808U | ||||
| JP123244B2 | ||||
| JP61986Y2 | ||||
| JP6427891A | ||||
| JP3192369A | ||||
| JP5856156Y2 | ||||
| JP5328879Y2 |
Foreign References:
| US4793170 |
Attorney, Agent or Firm:
Hasegawa Soji
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