NC program generating method, NC program generating apparatus, computer memory product, and computer program product
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United States of America Patent
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Aug 3, 2004
Grant Date -
Jul 3, 2003
app pub date -
Aug 30, 2002
filing date -
Dec 4, 2001
priority date (Note) -
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Abstract
A maximum undeformed chip thickness, a cutting arc length or an engage angle, and an active angle for each tooth of the end mill are calculated when a ball end mill is used in machining, or the maximum undeformed chip thickness, the cutting arc length or the engage angle, and an axial depth of cut for each tooth of the end mill are calculated when a straight end mill is used in machining. Then, the estimated value of the cutting force F.sub.xy or F.sub.xyz in each portion of the tool path is calculated on the basis of a response surface whose explanation variables are composed of the above-mentioned calculated values, whereby the feed rate contained in an equation for the maximum undeformed chip thickness t.sub.m is determined to maintain the obtained estimated value of the cutting force F.sub.xy or F.sub.xyz at an appropriate value.
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