Method for forming spherical concave surfaces

Details Method for forming spherical concave surfaces Method for forming spherical concave surfaces

B - Operations, Transporting

23

P

B23P 15/00 (2006.01) B23B 5/40 (2006.01) F04B 27/08 (2006.01)

Patent

CA 2315272

A method for forming a spherical concave surface includes the steps of bringing a tool into contact with a material to be formed, rotating the material around a predetermined axis, and moving the tool in a first direction parallel to a central axis of the tool and is a second direction perpendicular to the first direction for forming the spherical concave surface on the material about the predetermined axis. In this method, a first angle of the central axis of the tool relative to the predetermined axis is selected to be greater than oe equal to a second angle of a tangent at a first end of the spherical concave surface in a cross- sectional plane including the predetermined axis relative to the predetermined axis. Because the tool may be moved only in one direction with respect to the second direction, a sudden recoil does not occur in a power transmitting mechanism in the processing machine. Consequently , the shperical concave surface may be formed in a desired target spherical shape without generating any inconvenient variation caused by a sudden recoil.

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