Boots – shoes – and leggings
Patent
1989-04-27
1991-01-15
Ruggiero, Joseph
Boots, shoes, and leggings
364191, G05B 19403
Patent
active
049858408
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an arbitrarily shaped workpiece machining method of machining an arbitrarily shaped workpiece defined by closed curves such as a pond shape, an island shape and the like, and more specifically, to an arbitrarily shaped workpiece machining method whereby the machining of the arbitrarily shaped workpiece is simplified.
BACKGROUND ART
When a numerically controlled machine tool carries out a complicated machining of a workpiece, such as the machining of a pond shape, machining leaving an island shape projection, machining leaving an island shape projection in a pond shape and the like, this machining process requires not only the machining of a pond shape or an island shape but also a cutting between contours. For example, when an island shape projection is to be left in a pond, not only the inside wall contour of the pond but also the interior of the pond except for the island portion must be cut
Conventionally, an overall machining process for these portions is programmed manually or by using an automatic program creation device or the like, but such a manual programming of complicated shapes is time-consuming and prone to a very high error rate. Further, the automatic program creation device is expensive, it is difficult to use the device for correcting a program during machining, and the creation of a machining program requires a high degree of skill.
DISCLOSURE OF THE INVENTION
An object of the present invention is to solve the above problems and to provide an arbitrarily shaped workpiece machining method capable of simplifying the machining of a complicated arbitrarily shaped workpiece by a numerical control apparatus.
To solve the above problems, according to the present invention, there is provided an arbitrarily shaped workpiece machining method of machining a workpiece having arbitrarily shaped machining portions defined by closed curves of a pond shape, an island shape and the like, comprising the steps of: pass; and to thereby machine the arbitrarily shaped portions defined by the closed curves.
An arbitrarily shaped workpiece having an island shape projection in the middle of a pond shape will be described as an example.
First, a slot is cut along the inside wall of the pond shape by an end mill or the like, and then a slot is cut along the outside wall of the island shape. At the same time, when the passages along the inside wall of the pond shape and the outside wall of the island shape are machined (machining of the slots) meshes having center lines through which the center locus of the end mill passes are stored as boundary meshes.
Then, portions between the boundary meshes are machined and a remaining portion is cut and removed.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1(a) is a diagram of meshes for creating a machining program;
FIG. 1(b) is a diagram of a mesh and a center line thereof;
FIG. 2(a) is a plan view of a workpiece to be machined;
FIG. 2(b) is a cross-sectional view taken along the line A--A of FIG. 2(a);
FIG. 3 is a flowchart of the machining process; and
FIG. 4 is a diagram of the machining of the inside wall of a pond and the outside wall of an island
BEST MODE OF CARRYING OUT THE INVENTION
An embodiment of the present invention will be hereinafter described with reference to the drawings
FIG. 2(a) is a plan view of a workpiece to be machined and FIG. 2(b) is a cross-sectional view taken along the line A--A of FIG. 2(a), wherein 1 designates a workpiece to be machined, 2 designates a pond shape machined portion, 2a designates the inside wall of the pond shape 2, 3 designates an island shape projection in the middle of the pond shape 2, and 3a designates the outside wall of the island shape 3. Note, FIG. 2(b) is a diagram of the workpiece after the machining is finished.
Next, the machining method will be described. FIG. 1(a) is a diagram of meshes for creating a machining program. Namely, as shown in FIG. 1(a), a drawing of the workpiece 1 to be machined is illustrated on the meshes. Portions in FIG. 1(a) which are id
REFERENCES:
patent: 4706200 (1987-11-01), Kishi et al.
patent: 4739489 (1988-04-01), Kishi et al.
patent: 4745558 (1988-05-01), Kishi et al.
Fanuc Ltd.
Ruggiero Joseph
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