US 4,617,623 AGranted

CNC process for displacing a movable member along a path on a 3D surface

AssigneeInoue-Japax Research Incorporated

InventorsKiyoshi Inoue, Jinzo Yabe

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Abstract

A CNC process for displacing a movable member along a path on an intricate surface in a three-dimensional coordinate system is disclosed in which the surface is divided into a plurality of elementary characteristic regions each individually definable as one of different geometrical categories such as toroidal, spherical, cylindrical and planar surfaces. The process comprises establishing a general equation for each of these categories and storing the established general equations into a memory unit for a computer. Data required to adapt each of the stored general equations to a corresponding one of the characteristic regions in the three-dimensional coordinate system are inputted into the computer to reduce the general equations to their respective specific equations in which no more than three coordinates are variable. A sequence of incremental two-dimensional positions defined in the system by first and second coordinates thereof are inputted into the computer to allow it to compute, for each position on the path, the value of the third coordinate from the first and second coordinates and the specific equations, thereby determining the path along which the member is moved.

Claims8

Dependent claims

A computerized numerical control process for displacing a member along a path on a predetermined intricate surface in a predetermined three-dimensional coordinate system, said process comprising the steps of:

(a) manually dividing said intricate surface into a plurality of elementary characteristic regions each of which is individually definable as one of preselected different geometrical categories among curves of first order, curves of second order, surfaces of first order for intricate surfaces so divisible and surfaces of second order for intricate surfaces so divisible and is expressable by an equation specific to each such region;
(b) establishing a general equation for each of said preselected geometrical categories and storing the established general equations in memory means for a computer;
(c) inputting into said computer data required to adapt each of said stored general equations to a corresponding one of said characteristic regions in said predetermined three-dimensional coordinate system, thereby reducing it to said specific equation;
(d) establishing a sequence of incremental two-dimensional positions in said three-dimensional coordinate system which positions are defined by predetermined first and second coordinates thereof;
(e) successively inputting into said computer the coordinates of said sequentially incremental two-dimensional positions to compute, for each incremental position along a path lying on said surface, the value of a third coordinate in said coordinate system from said specific equations and said inputted first and second coordinates, thereby determining said path three-dimensionally;
and
(f) displacing said member along the so determined path.

4 more elements

A computerized numerical control process for displacing a member over a predetermined intricate surface in a predetermined three-dimensional coordinate system, said process comprising the steps of:

(a) manually dividing said intricate surface into a plurality of elementary characteristic regions each of which is individually definable as one of preselected different geometrical categories among curves of first order, curves of second order, surfaces of first order for an intricate surface so divisible, and surfaces of second order for an intricate surface so divisible and is expressable by an equation specific to each such region;
(b) establishing a general equation for each of said preselected geometrical categories and storing the established general equation in memory means for a computer;
(c) inputting into said computer data required to adapt each of said stored general equations to a corresponding one of said characteristic regions in said predetermined three-dimensional coordinate system, thereby reducing it to said specific equation;
(d) establishing a sequence of incremental two-dimensional positions in said three-dimensional coordinate system which positions are defined by predetermined first and second coordinates thereof;
(e) successively inputting into said computer the coordinates of said sequentially incremental two-dimensional positions to compute, for each incremental position over said surface, the value of a third coordinate in said coordinate system from said specific equations and said inputted first and second coordinates, thereby determining said surface three-dimensionally;
and
(f) displacing said member along a path over the so-determined surface.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/742,366Filed 7 Jun 1985 · continuation
Priority: JP 56-16615916 Oct 1981
Granted: 14 Oct 1986
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G05B 19/41
Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to…
G05B 2219/1125
Plc I-O input output: i-O addressing
G05B 2219/34128
Director, elements to supervisory: general surface replaced by sphere, cylinder, toroid, calculate quickly
G05B
Control or regulating systems in general