JPH01200410A - Program generating method and program data input device - Google Patents

Abstract

PURPOSE:To generate a working program by the form arithmetic to work a product equal to a product model by using a numerical controller which contains an arithmetic unit, a storage device, a position controller, and a CRT/ MDI unit. CONSTITUTION:A product model 1 is set on a table of a machine tool for pro duction of an NC working program. A probe 2 attached to a machine tool movable part 3 reads the coordinate value of a point set on the model 1. Then, a numerical controller containing an arithmetic unit, a storage device, a position controller, a CRT screen display device, and an MDI key input device is con nected to the machine tool main body. The NC control is applied to each axis of the part 3. At the same time, the point data on the model 1 read by a CRT/ MDI unit 4 is displayed together with input of the data on plural forms for connection among those points. An operator operates the probe 2 of the part 3 to read the coordinate value of the point on the model 1.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a program creation method for creating an NC machining program for a machine tool according to a product model.

(Prior Art) It is known that a product model is used as a method for accurately reproducing a normal complicated three-dimensional shape.

As shown in Fig. 3, the conventional method of creating a program using a product model is to divide a predetermined cross section of the product model 1 at a specific pitch, and then attach the tip of the probe 2 of the measuring instrument to the product model 1.
The device was placed on the surface of the device to read position data. but,
If it is not possible to connect the divided pitches with a straight line, such as between A-8 in the figure, a drawing is created based on the product model, and from there the dimensional data and shape data are extracted by the operator. It will be read and an NC machining program will be created.

(Problem to be Solved by the Invention) In this conventional program creation method, a predetermined cross section of a product model is divided into a plurality of blocks, and data for each division is used as one block of the NC machining program. , complex three-dimensional shapes can be accurately and easily reproduced.

On the other hand, in the case of relatively simple product models, cost problems arise because probes and measuring instruments are expensive, and data for each division is used as one block of the NC machining program. However, there was a problem in that the NC machining program was long compared to the machined shape, making efficient machining impossible.

The present invention was made to solve the above problems, and
The purpose of this paper is to provide a program creation method that can easily create efficient NC machining programs in a short period of time.

(Means for Solving the Problems) According to the present invention, a machine tool uses a product model to
In a program creation method for creating an NC machining program for a dimensional shape, the step of installing the product model at a predetermined position on a machine tool and reading and storing coordinate values of a plurality of positions on the product model using a movable part thereof; The method is characterized by comprising a step of determining shape data corresponding to the contour of the product model from stored coordinate values and performing shape calculations, and a step of configuring program data for NC machining that copies the product model. In a program data input device that can provide a program creation method and input shape data according to the contour of a product model as program data for NC machining, the program data input device is attached to a movable part of a machine tool and coordinates of a point on the product model. A program data input device comprising a reading means for reading a value, an input means for inputting shape data connecting the read points, and an arithmetic means for calculating a shape from the coordinate values and the shape data. equipment can be provided.

(Operation) In the program creation method of the present invention, by using a numerical control device having an arithmetic unit, a storage device, a position control device, and a CRT/MDI unit, the program creation method corresponds to a product model installed at a predetermined position of a machine tool. By inputting position data and shape data, it is possible to create an NC machining program for machining the same product as the product model by shape calculation.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory diagram showing a program data input device of the present invention. A product model 1 for creating an NC machining program is installed at a predetermined position on the table of a machine tool, and is processed by a probe 2 attached to a movable part 3 of the machine tool.
The coordinate values of points on product model 1 are read. The machine tool main body (not shown) is connected to a numerical control device having an arithmetic unit, a storage device, a position control device, a CRT screen display device, and an MDI key input device, and each axis of the movable part 3 is connected to an NC
controlled. 4 is a CRT/MDI unit, which displays the read point data of product model 1, and
It has a data input function regarding multiple shapes to connect them. Further, an operator can manually move the probe 2 attached to the movable part 3 using a manual operation panel (not shown).

FIG. 2 is a flowchart showing the procedure for creating an NC machining program using the machine tool.

To set the product model 1 on the machine tool, in step a) operate the manual operation panel of the machine tool and bring the probe 2 at the tip of the movable part 3 into contact with a part of the product model 1 (step b).
). At this time, the operator checks whether the movable part 3 has moved to the required point of the product model 1 on the CRT/MI)I unit 4 and operates the MDI key at a predetermined timing to move the machine tool. The coordinate values of the tip position of the movable part are stored in the storage device inside the numerical control device (step C). To read this position data, for example, a maximum of two points are required for a straight line portion of the product model 1, and a maximum of three points are required for a circular arc portion.

Once the position data has been input for the required number of points (step d), the operator, while viewing the display on the CR7 screen, inputs shape data connecting the read points by key operation (step e). By specifying the shape, the calculation unit of the numerical control device uses the stored position coordinate data and shape data of the machine tool to create a machining program for cutting the shape part on the product model 1.
A format processing program is created (step f). In this case, the shape data may be input after inputting all the necessary position data for one cross section of the product model 1.

Shape data corresponding to the contour of the product model 1 is determined from the stored coordinate values, and after the shape calculation is performed, it is stored in a predetermined area of the storage section of the numerical control device as program data for NC machining. At that time, necessary material shape data and tool data are referred to and processed as program data for NC machining that can be directly machined by the machine tool. N for all shapes above product model 1
When the C machining program is created (step g), the series of operations ends.

Although the probe 2 is attached to the movable part 3 of the machine tool, it is also possible to use the tool itself, for example, as long as it has a positioning function. Further, shape designation is not limited to straight lines and circular arcs.

Although this invention has been described in some detail with respect to its most preferred embodiment, the description of the preferred embodiment does not include modifications in the detailed parts of the structure unless they are contrary to the spirit of the invention as described in the claims. It is clear that various modifications or combinations of these can be made.

(Effects of the Invention) As explained above, according to the present invention, it is possible to provide an inexpensive program data input device for inputting shape data according to the outline of a product model as program data for NC machining. It is possible to create an NC machining program for a product with a simple three-dimensional shape in a short time and accurately, and to provide a method for creating a program with high operating efficiency for a numerical control device.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a flowchart showing the procedure for creating an NC machining program using a machine tool, and Fig. 3 is a flow chart showing the procedure for creating an NC machining program using a conventional product model. FIG. 1... Product model, 2... Probe, 3... Machine tool moving part, 4... CRT/MDI unit. Patent applicant: Representative of FANUC Co., Ltd. Patent attorney: Minoru Tsuji 4CfZ
T/MpL Figure 2

Claims (5)

[Claims] (1) In a program creation method that uses a product model to create a three-dimensional NC machining program using a machine tool, the product model is installed at a predetermined position on the machine tool, and its movable part allows multiple a step of reading and storing the coordinate values of the position; a step of determining shape data according to the contour of the product model from the stored coordinate values and performing shape calculation; and a step of copying the product model.
A program creation method comprising the steps of configuring program data for C machining. (2) The cutting tool attached to the movable part of the machine tool,
2. The program creation method according to claim 1, further comprising reading coordinate values of a plurality of positions on the product model by using the probe as a probe for position detection. (3) The program according to claim (1) or claim (2), wherein the read coordinate values and shape data according to the contour of the product model are determined by key input operations while displaying on the screen. How to make. (4) A numerical control device main body that controls the machine tool configures program data for NC machining that imitates the product model.
) or the program creation method according to claim (3). (5) A program data input device for inputting shape data according to the contour of a product model as program data for NC machining, a reading means attached to a movable part of a machine tool for reading coordinate values of points on the product model; , an input means for inputting shape data connecting the read points;
A program data input device comprising: calculation means for calculating a shape from the coordinate values and shape data.