Posted in Engineering Drawing

Involutes Curve Engineering Drawing

An involute is a curve traced by a point on a perfectly flexible string, while unwinding from around a circle or polygon the string being kept taut (tight). It is also a curve traced by a point on a straight line while the line is rolling around a circle or polygon without slipping. To draw an involute of a given square. Construction 1. Draw the given square ABCD of side a. 2. Taking A as the starting point, with centre B and radius BA=a, draw an arc to intersect the line CB produced at P1. 3. With Centre C and…

Posted in Engineering Drawing

How Conic Section is Formed

Conic Sections Cone is formed when a right angled triangle with an apex and angle e is rotated about its altitude as the axis. The length or height of the cone is equal to the altitude of the triangle and the radius of the base of the cone is equal to the base of the triangle. The apex angle of the cone is 2 e (Fig. 1a). When a cone is cut by a plane, the curve formed along the section is known as a conic. For this purpose, the cone may be cut by different section planes (Fig. 1b)…