JPH0218602A - Play-back system - Google Patents

Abstract

PURPOSE:To attain a play-back operation on an optional working plane by executing play-back operation on a working plane, and transforming the machine position obtained by said play-back operation into a coordinate system on a basic plane for production of a working program. CONSTITUTION:An optional working plane 2 is defined for a basic plane 1 and the coordinates of each axis are referred to as (x), (y) and (z) for a coordinate system 1a of the plane 1. In other words, the plane 2 is turned by a rotational angle theta around a rotational axis 3, for example, which is parallel to the axis (y) of the plane 1 and a coordinate system 2a is expressed in X, Y and Z. The machine position 4 to be played back is equal to a planar pattern on the plane 2. Then a play-back operation is carried out on the plane 2 via the coordinate systems X, Y and Z like the plane 1. When the play-back operation is through, the position 4 is transformed into the values of the coordinate systems (x), (y) and (z) of the plane 1. As a result, the play-back operation is attained on an optional working plane.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a playback method for creating a machining program for a numerically controlled machine tool, and particularly to a playback method that allows playback on any machining plane in three-dimensional space. Regarding playback method.

[Conventional technology]

To create machining programs for numerically controlled machine tools,
A playback method is widely used in which a machining program is created by recording the coordinate position of the machine obtained by manual operation or the like. This is a method of creating a machining program for machining a 3D shape model by following the model, or a method of creating a single actual machining sample using a separate method and then calculating the machine position by manually operating it. There is.

In these playback schemes, the basic plane, e.g.
- It is common to find the required machine position on the Y plane. Therefore, it is possible to include circular interpolation within the basic plane, tool diameter correction, etc. in the machining program.

[Problem to be solved by the invention]

However, when the model shape becomes complex, machining only on the basic plane is no longer sufficient, and it is desirable to be able to process on any machining plane. In machines where the tool axis can be controlled by a machining program, it is almost impossible to machine a three-dimensional model by only machining on the basic plane. Also,
In the conventional playback method, circular interpolation and tool diameter correction cannot be specified on any machining plane, so they can only be commanded on the basic plane, making it difficult to perform high-precision machining.

The present invention has been made in view of these points, and has the following three points.
The purpose of this invention is to provide a playhack method that allows playback on any processing plane in dimensional space.

[Means to solve the problem]

In the present invention, in order to solve the above problem, in a play hack method for creating a machining program while reading the machine position obtained by manual operation, an arbitrary machining plane is defined with respect to the basic plane, and the machining plane is A play-hack method is provided, characterized in that a play-back operation is performed on the above, and the machine position obtained by the play-hack operation is converted to the coordinate system of the basic plane to create a machining program.

[Effect]

The program operation is performed on an arbitrary machining plane, and the obtained machine position on the machining plane is converted into coordinate values on the basic plane.

Therefore, commands for circular interpolation, tool correction, etc. can also be included in playback on an arbitrary machining plane.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a conceptual diagram for explaining the present invention.

In the figure, ■ is a basic plane, which here is the XY plane. 1a is the coordinate system of the basic plane, and the coordinates of each axis are x
, y, and z.

2 is a processing plane, which is a plane rotated by a rotation angle θ around a rotation axis 3 parallel to the y-axis of the basic plane l.

The coordinate system 2a is represented by x, Y, . Reference numeral 4 indicates a figure to be played back, which is a plane figure on the processing plane 2. In figure 4, there is a straight line between points AB, an arc between points B and C, and a straight line between points (, -A).

Here, the playback operation is performed on the processing plane 2. In this case, the machining plane 2 is unchanged from the conventional basic plane.
Playhack operations can be performed in a conventional manner on the above coordinate system x, y, z, arcs can also be performed, and tool radius corrections can also be included.

Next, when the play hack operation is completed, this figure is converted into the values of the coordinate system x, y, z of the basic plane 1.

Figure 2 shows the figure when converted. In the figure, 1 is the basic plane, 1a is the coordinate system of basic plane 1, and 4a is the coordinate system l
This is the figure converted onto a. The transformation in this case is a linear transformation, and the transformation vector is stored in advance as a transformation parameter for the basic plane 1 and the processing plane 2. This parameter gives three points on the basic plane 1 and three points on the processing plane 2, from which the transformed hector can be determined.

In actual machining after creating a machining program, it is common to convert the coordinate values on the basic plane 1 to the machining plane 2 and perform the machining. That is, machining is performed with the tool axis tilted in a direction perpendicular to the machining plane. The transformation in this case is the inverse transformation of the transformation from the processing plane to the basic plane.

In the above explanation, the machining plane is a plane rotated around an axis parallel to one coordinate axis of the basic plane, but it can also be a plane rotated around an axis perpendicular to the axis around which the machining plane was rotated. good. Furthermore, it is also possible to select and play back another machining plane for each certain machining process.

However, in this case, it is necessary to obtain a transformation vector for each machining plane.

FIG. 3 shows a hardware configuration diagram of a numerical control device for implementing the present invention. In the figure, 6 is a processor;
A ROM 7 stores a control program for controlling the numerical control device.

Reference numeral 8 is a RAM, 9 is a display, and 10 is a non-volatile memory in which machining programs created by playback, conversion parameters between machining planes and basic planes, tool diameters, etc. are stored.

Reference numeral 11 denotes an operation panel, and the operator uses the operation panel 11 to perform playback operations. 12 is a machine tool.

〔Effect of the invention〕

As explained above, in the present invention, the playback operation is performed on the machining plane and the coordinate values are converted to the coordinate system of the basic plane, so the playback operation can be performed on any machining plane, and any This enables circular interpolation or tool diameter correction on the machining plane. Therefore, circular interpolation or tool correction can be performed by playing back the three-dimensional model, and a machining program for the three-dimensional model can be efficiently created.

[Brief explanation of the drawing]

Fig. 1 is a conceptual diagram for explaining the present invention, Fig. 2 is a diagram showing a figure whose coordinates have been transformed from a machining plane to a basic plane, and Fig. 3 is a diagram of the hardware of a numerical control device for implementing the present invention. FIG. 1 Basic plane 1 a---- Coordinate system 2 on the basic plane
Machining plane 2 a ------- Coordinate system on one machining plane 3 ----
--1.-- Rotation axis 4 Figures 4a on the machining plane ----m-- Figures 6 converted onto the basic plane Processor 7 --- ------ROM8
RAM 9...---------...Display 10----
-1・-1----Non-volatile memory 11 Operation panel 12 Machine tool patent applicant FANUC Co., Ltd. agent Patent attorney Takeshi Hattori Figure 3

Claims (3)

[Claims] (1) In the playback method for creating a machining program while reading the machine position obtained by manual operation, an arbitrary machining plane is defined with respect to the basic plane, and a playback operation is performed on the machining plane, A playback method characterized in that a machining program is created by converting the machine position obtained by the playback operation into a coordinate system of the basic plane. (2) A conversion parameter between the basic plane and the machining plane is obtained from coordinate positions of three points on the basic plane and coordinate positions of three points on the machining plane. Playback method described in section. (3) The playback method according to claim 1, wherein the playback includes circular interpolation or tool radius correction on the machining plane.