Patent ID: 11969805
Assignee: SOOCHOW UNIVERSITY
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A method for milling a large-diameter aspheric surface by using a splicing method, the aspheric surface being a concave surface, with a generatrix equation denoted as f1, the aspheric surface having a diameter of D, and a numerical control machine tool for milling having positioning accuracy of β, wherein the aspheric surface is discretized into N rings equally spaced in an X-axis direction, Nis an integer, any ring has a width of dx=D/(2N), and a semi-diameter of the aspheric surface corresponding to the nth ring is denoted as xn; the rings are sequentially machined via generating cutting by using an annular grinding wheel tool with an outer diameter less than ¼ of the diameter of the aspheric surface; wherein n is the ordinal number of any one of the first ring to the Nth ring, and constraint conditions of the dx solution are as follows: the generatrix equation of the (N−1)th ring is denoted as f2, and the generatrix equation of the Nth ring is denoted as f3; a point at x1 on f3 is denoted as (x1, z1), a point with a vector height being z1 on f2 is denoted as (x2, z1), and a point at x2 on f1 is denoted as (x2, z2), wherein xn=n*dx, x1=D/2, z1−z2=β, and x2=x1−dx.