| Project/Area Number |
06650796
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Material processing/treatments
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| Research Institution | Shinshu University |
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Principal Investigator |
KITAZAWA Kimiyoshi Shinshu University, Fuculity of Eng., Associated Prof., 工学部, 助教授 (90143825)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1995: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1994: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | CNC incremental forming machine / Intelligent metal-flow control / Touch sense / Sheet metal forming / Potter's wheel operation / Stretch-expanding / Tool-envelope surface / Small-lot production / 知能化マタルフロー制御 / 塑性加工 / 板材成形 / インクリメンタルフォーミング / メタルフロー制御 / 知能化成形 / CNCフォーミング / 棒状工具 |
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| Research Abstract |
An incremental stretch-expandling is a process in which a sheet metal is stretch-expanded to fit on a tool-envelope surface made by relative motion of a tool around the sheet metal. The incremental forming process seems to be suited to small-lot production from viewpoint of a die-less forming operation, and is also thought to be important in metal-flow control operation. This study presents the development of the CNC incremental forming machine with touch sense in which the motion of the cylindrical tool can be controlled by a computer, made to imitate a figer motion in potter's wheel operation, and its application to intelligent metal-flow control in sheet metal stretch-expanding. Various kinds of axisymmetrical shell components, such as bulygy pot-shaped shell and deep cylindrical shell, were stretch-expanded by the developed machine. Effect of tool path schedules on strain distribution and limit in the shell components was examined using aluminum, aluminum alloy and copper sheets. It is found that the tool path schedules has influence on strain distribution in shell components, and the associated metal-flow has influence on the forming limit and large deflection. Experimental results suggest that the metal flow phenomena can be estimate qualitatively by the touch information between the tool and the sheet metal during the forming operation. Therefore, theproposed process by the developed machine with touch sense is useful for intelligent metal-flow control in sheet metal forming operation.
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