Engineering Graphics: Unit I (d): Engineering Curves
Involute
Engineering Graphics (EG)
Involute is a curve traced by an end of a string or thread, when it is unwound from a circle or a polygon, the thread being kept tight.
INVOLUTE Involute is a curve traced by an end of a string or thread, when it is unwound from a circle or a polygon, the thread being kept tight. Involute may also be defined as a curve traced out by a point on a straight line which rolls around a circle or a polygon, without slipping. Consider a circle of diameter `D' wounded by a thread as shown in Fig. 7.14. When the thread is unwound, keeping the thread is tight, for one complete revolution of circle, the thread will have a profile as shown in Fig. 7.14(b). It is to be noted that when the thread is unwound, the thread is always tangential to the circle and a point on thread will generate an involute profile. Involute can be drawn for a circle or any polygon. Gear teeth profiles (Fig. 7.15a) and casings of centrifugal pumps are of involute of a circle.
Engineering Graphics: Unit I (d): Engineering Curves : Tag: : Engineering Graphics (EG) - Involute
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Engineering Graphics
GE3251 eg 2nd semester | 2021 Regulation | 2nd Semester Common to all Dept 2021 Regulation