How to express the conic round in engineering drawing?

Forum|Forum|12 years ago
May 28, 2014
2 replies
3558 views

Hi everyone,

I creat a conic round,the conic parameter as following picture:

my question is how to express these parameters of this feature in engineering drawing?

By the way, what's the definition of the round sharpness?

thanks.

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General

Patriot_1776

22-Sapphire II

Sharpness? I think you mean the rho value.

Z

zhenqiang

Author

8-Gravel

it's rho exactly.

M

MartinHanak

24-Ruby III

See the following Help page.

http://www3.eng.cam.ac.uk/DesignOffice/cad/proewild3/usascii/proe/sketcher/example_conic_rho_dimension.htm

Example: The rho Dimension of a Conic

The rho dimension of a conic segment PQ defines the shape of the conic. The line segments PR and QR are tangent to the ellipse at points P and Q respectively. The line segment RD intersects the line segment PQ at point D. Here, D is the mid point of the line segment PQ. The rho dimension specifies a ratio along a vector from the chord (PQ) through a point C to the vertex (R). Point C is at the maximum distance (CD), measured by a normal from the chord PQ to the conic segment PQ.