مسائل الكامات وحلها المثال الأول

المثال الأول

A radial plate cam rotates at 20 revolutions per minute and operates an inline knife edge follower. The nearest approach of the follower to the cam centre is 35 mm. Draw the profile on the cam which will impart the following motion to the follower

Rise 48 mm with uniform velocity	0 to 1 second
Dwell	1 to 1.5 seconds
Return to initial position with uniform acceleration and retardation	1.5 to 3 seconds

الحل

Motion type	Duration of motion	Angular displacement
Rise 48 mm with uniform velocity	0 to 1 second	0° to 120°
Dwell	1 to 1.5 seconds	120°to 180°
Return to initial position with uniform acceleration and retardation	1.5 to 3 seconds	180°to 360°

وبعد ما عرفنا نرسم الكام بروفيل تكون الرسمه النهائيه هى:

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