×

Feature based method of designing automotive panels

  • US 5,119,309 A
  • Filed: 03/25/1991
  • Issued: 06/02/1992
  • Est. Priority Date: 04/26/1989
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of creating and machining a three dimensional composite surface on a workpiece using a computer, said composite surface being defined by a function z=g1 (x,y) containing a primary surface S0 defined by a function z=f0 (x,y), a secondary surface S1 defined by a function z=f1 (x,y), and which makes a smooth transition between S0 and S1, comprising the steps of:

  • a. entering into said computer a plurality of coordinate data points xj, yj,j=1,2, . . . Nb. connecting said data points in the xy-plane with straight lines and rounding the jth corner of the thereby defined polygon with a circle of radius rj to define a smooth closed curve C1,c. offsetting C1 by a predetermined amount R to define a closed curve C0,d. generating output data which defines the composite surface as coinciding with S0 in the region outside the curve C0, coinciding with S1 in the region inside the curve C1, and making a smooth transition from S0 to S1 in the region between C0 and C1,e. machining the workpiece in accordance with said output data.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×