JPH11282521A - Numerical controller and three-dimensional coordinate position inputting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily input a three-dimensional coordinate position. SOLUTION: In this three-dimensional coordinate position inputting method, a pseudo three-dimensional coordinate position is calculated from the machining command position data communicated from a machining instruction controlling part 101 and display basic data stored in a display basic data storing part 1023, and display interpolation data are prepared from the present display start pseudo three-dimensional coordinate position by a display moving position calculating part 1021 of a machining shape displaying part 102, and a scheduled machining shape indicated by the pseudo three-dimensional coordinate is displayed through a display interpolating part 1022 on a display device 103. A plane designation point and a height designation point indicated by a screen coordinate system are obtained from an inputting device 104. Then, XY plane coordinate positions (X0, Y0) of the true three-dimensional coordinate system are calculated from the plane designation point and the basic display data, and true three-dimensional coordinate positions (X0, Y0, Z0) are calculated from the height designation point, XY plane coordinate positions, and display basic data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical control device and a three-dimensional coordinate position input method thereof, and more particularly to a numerical control device for performing three-dimensional position control of a control target based on coordinate position information input from outside. , And a method of inputting the three-dimensional coordinate position information.

[0002]

2. Description of the Related Art Machine tools for performing three-dimensional machining under the control of a numerical controller are widely used. An outline of this kind of general machine tool will be described with reference to FIG. Referring to FIG. 10, in a general machine tool including a numerical controller 808, a workpiece 801 fixed to a movable table 804 is machined by a machining tool 802. The processing tool 802 is fixed to the processing tool mounting device 803. Motor 805, motor 80
6 moves the movable table back and forth, left and right, respectively. The motor 807 moves the working tool mounting device 803 up and down. The numerical controller 808 controls the motors 805, 806, 807 based on the processing command 809 and the setting from the operation panel 810 so that desired processing can be performed.

In order to execute the control by the numerical controller 808, conventionally, an operator displays a planned processing shape on a screen of the numerical controller 808, calculates a movement amount up to a processing start point on a desk, and further moves. Control data is created, control data is input from the operation panel 810 of the numerical controller 808, and the machining tool 802 is moved to the machining start point. The operator also calculates the definition position of the command data on the desk, creates the definition data, and operates the operation panel 810 of the numerical control device 808.
It was set by inputting more control data.

Next, an example of a conventional system for inputting a three-dimensional coordinate position using an input device for inputting a position of a two-dimensional plane and displaying the position on a display device screen will be described (Japanese Patent Laid-Open No. Hei 6 (1994) -176).
-274572). Note that a true orthogonal coordinate system [X, Y, Z] is a true three-dimensional coordinate system, and coordinates in which a solid of the true three-dimensional coordinate system is pseudo-three-dimensionally displayed on one two-dimensional plane screen by a projection method. Let the system be a pseudo three-dimensional coordinate system,
The input coordinate system on the screen is described as a screen coordinate system.

In this conventional three-dimensional CAD system, 2
Arbitrary true three-dimensional coordinates are input to the pseudo three-dimensional coordinate system shown on the three-dimensional screen coordinates by using two-dimensional coordinate input means. There are the following two methods for inputting two-dimensional coordinates on screen coordinates.

A first method is to display a pseudo three-dimensional coordinate system on a screen, input an arbitrary first point, and specify a second point after rotating the pseudo three-dimensional coordinate system in the screen by 90 degrees. The true three-dimensional coordinate position has been obtained.

In a second method, three screens of a pseudo three-dimensional coordinate system screen, an XY screen of a two-dimensional coordinate system, and a ZX screen of a two-dimensional coordinate system are displayed on the screen, and one point is displayed on each of two screens of the two-dimensional coordinate system. By specifying an arbitrary point, a true three-dimensional coordinate position is obtained.

[0008]

The above-mentioned prior art has the following problems.

In the first method, (1) an operation of rotating a pseudo three-dimensional coordinate system in a screen to input two arbitrary points occurs. (2) Since the pseudo three-dimensional coordinate system is rotated, the operator must re-image the entire machining shape.

Further, in the second method, (3) an operation of switching the input screen to input two arbitrary points occurs. (4) Since the input screen is a two-dimensional screen, when the operator inputs an arbitrary point, it is necessary to input the entire processing shape and the input screen while associating the input screen.

An object of the present invention is to provide a numerical control device which reduces the above-mentioned operation of the operator and improves operability, and a method for inputting a three-dimensional coordinate position thereof.

[0012]

According to the present invention, there is provided a numerical controller for performing three-dimensional position control of a control target based on coordinate position information input from the outside.
A pseudo three-dimensional coordinate system in which a true three-dimensional rectangular coordinate system is displayed in a pseudo three-dimensional manner by projecting a solid on one two-dimensional plane of a display device screen using a plane designated point corresponding to the screen. There is provided means for obtaining coordinate position information in the true three-dimensional orthogonal coordinate system only by inputting two-dimensional coordinate position information of two points with the designated height point.

In the above configuration, the controlled object includes a processing means and a workpiece whose shape is to be processed by the processing means, and the processing target shape of the workpiece in a true three-dimensional coordinate system is determined. Display means for converting to a pseudo three-dimensional coordinate system for display; input means for specifying two-dimensional coordinate position information of two plane designated points and a height designated point while displaying on the display means; and the input means Two 2 input from
Input processing means for analyzing the dimensional coordinate position information and converting it into one true three-dimensional coordinate position information.

A machining command control unit for controlling a machining command issued from the outside and converting it into machining command position data;
A processing shape display unit that calculates a pseudo three-dimensional coordinate system position based on the processing command position data and performs display control; and displays a planned processing shape on a pseudo three-dimensional coordinate system under the control of the processing shape display unit. A display device to be executed, an input device for inputting a position of a two-dimensional plane on the display device, and an input process for analyzing input data from the input device and outputting the data to the machining shape display unit and a motor movement position calculation unit to be described later. And a motor that moves the processing means or the workpiece, and a motor movement position calculation unit that calculates the movement position of the motor and performs movement control via a motor interpolation unit.

Further, the processing shape display section includes a display movement position calculation section, a display interpolation section, and a display basic data storage section, and the display movement position calculation section is notified by the processing command control section. Pseudo three-dimensional data based on the processed command position data and display basic data that is conversion constant data for displaying a solid on a true three-dimensional coordinate system stored in the display basic data storage unit on a two-dimensional screen. Calculate the coordinate system position, create display interpolation data by comparing with the current display position,
Notifying the display interpolation unit, the display interpolation unit displays the planned processing shape on the display device according to the display interpolation data notified from the display moving position calculation unit, and the display basic data storage unit stores A configuration may be employed in which display basic data determined at the start of shape display is stored.

Alternatively, a pseudo three-dimensional coordinate system in which a true three-dimensional rectangular coordinate system is displayed in a pseudo three-dimensional manner on a single two-dimensional plane of a display device screen by projection projection is used. It may be configured to have means for obtaining coordinate position information in the true three-dimensional orthogonal coordinate system only by inputting two-dimensional coordinate position information of each of three designated points on each dimension axis of the three-dimensional coordinate system. it can.

According to the three-dimensional coordinate position input method of the present invention, a three-dimensional coordinate position is input to a control object based on coordinate position information input from the outside.
In a method for inputting three-dimensional coordinate position information in a numerical control device that performs three-dimensional position control, a true three-dimensional orthogonal coordinate system is simulated by projecting a solid onto one two-dimensional plane of a display device screen by projection projection. When displayed as a pseudo three-dimensional coordinate system displayed three-dimensionally, and when two-dimensional coordinate position information of two points, a plane designated point and a height designated point, on the screen corresponding to the pseudo three-dimensional coordinate system is input, There is a step of analyzing these two two-dimensional coordinate position information and converting it into one true three-dimensional coordinate position information.

In the above process, display basic data as conversion constant data for displaying a solid on a true three-dimensional coordinate system on a two-dimensional screen is stored. The data is converted into a pseudo three-dimensional coordinate system position from the display basic data and the processing command position data, and compared with the current display position to create display interpolation data. And a step of displaying the shape to be processed.

[0019]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a numerical control apparatus having means for determining a true three-dimensional coordinate system position according to the present invention. In FIG. 1, a numerical controller according to the present embodiment (first embodiment) includes a machining command control unit 101 that controls a machining command, a machining shape display unit 102 that performs display control, and a pseudo three-dimensional A display device 103 for displaying on a coordinate system, an input device 104 for inputting a position on a two-dimensional plane on the display device, an input processing unit 105 for analyzing input data, and a motor movement position for calculating a motor movement position It comprises a calculation unit 106, a motor interpolation unit 107 for performing movement control, and a motor 108 for performing movement.

The true orthogonal coordinate system [X, Y, Z] is displayed in a true three-dimensional coordinate system, and a solid of the true three-dimensional coordinate system is pseudo-three-dimensionally displayed on one two-dimensional plane screen by the projection method. The coordinate system used is called a pseudo three-dimensional coordinate system, and the input coordinate system on the screen is called a screen coordinate system. FIG. 5 shows an example in which a three-dimensional object is displayed on a screen using a pseudo three-dimensional coordinate system. As shown in FIG. 6, the pseudo three-dimensional coordinate system includes a plane and a height. For example, the plane is an XY plane, and the height is the Z axis.

Next, the function and operation of each part of the numerical controller shown in FIG. 1 will be described.

The processing command control unit 101 converts a processing command specified externally into processing command position data and notifies the display movement position calculation unit 1021 of the processing shape display unit 102.

The processing shape display section 102 includes a display movement position calculation section 1021, a display interpolation section 1022, and a display basic data storage section 1023.

The display movement position calculation unit 1021 calculates a pseudo three-dimensional coordinate system position from the processing command position data notified from the processing command control unit 101 and the display basic data stored in the display basic data storage unit 1023. Then, the display interpolation data is created by comparing the display interpolation data with the current display position.
Notify 22. Here, the display basic data refers to conversion constant data for displaying a solid on a true three-dimensional coordinate system on a two-dimensional screen. As the display basic data, a numerical value is directly input to the display basic data storage unit 1023 or the display position calculation unit 1021 is obtained from the processing shape to be displayed, the display range, and the display angle.
Is calculated automatically.

The display interpolating unit 1022 displays the processing target shape on the display device 103 according to the display interpolating data notified from the display moving position calculating unit 1021.

The display basic data storage unit 1023 stores the display basic data determined at the time of starting the display of the shape to be processed.

The input processing unit 105 calculates a true three-dimensional coordinate system position from the plane designation point and the height designation point given from the input device 104 and the display basic data stored in the display basic data storage unit 1023. Then, it notifies the motor movement position calculation unit 106 and the display movement position calculation unit 1021.

The motor movement position calculator 106 calculates interpolation data from the true three-dimensional coordinate system position notified from the input processor 105 and the current position of the motor 108 (current motor position). Notice.

The motor interpolation unit 107 controls the motor 108 according to the interpolation data calculated by the motor movement position calculation unit 106.

Next, the operation of the numerical controller according to the present embodiment (first embodiment) will be described in detail.

The processing command control unit 101 converts a processing command externally specified (may be temporarily stored) into processing command position data, and sends it to the display movement position calculation unit 1021 of the processing shape display unit 102. Notice.

The display movement position calculation unit 1021 calculates the processing command position data notified from the processing command control unit 101,
A pseudo three-dimensional coordinate position is calculated from the display basic data stored in the display basic data storage unit 1023, display interpolation data is created from the current display start pseudo three-dimensional coordinate position, and the display interpolation unit 1022 is notified.

The display interpolation unit 1022 displays the planned processing shape on the pseudo three-dimensional coordinates of the display device according to the display interpolation data notified from the display movement position calculation unit 1021.

Here, the operation of the input processing unit 105 will be described in detail with reference to FIG. 2 and FIG. 7 (divided diagrams (a), (b), (c)).

Here, the display device 103 displays the operator 3
It is assumed that coordinate axes capable of imaging a dimensional coordinate system and a planned processing shape of a workpiece are drawn (FIG. 7A).

The plane designated point Ph (X1, Y1) shown in the screen coordinate system is obtained from the input device 104 in FIG. The screen display on the display device 103 at this time is as shown in FIG.

In the process of step 202, the designated height Pv (X2, Y2) indicated by the screen coordinate system is input to the input device 104.
Get from. The screen display on the display device 103 at this time is as shown in FIG.

In the processing of step 203, step 201
The XY plane coordinate position (X0, X0, X2) of the true three-dimensional coordinate system is obtained from the plane designated point Ph obtained in step (1) and the display basic data stored in the display basic data storage unit 1023 of the processing shape display unit 102.
Y0) is calculated. Further, based on the height designated point Pv obtained in step 202, the XY plane coordinate position, and the display basic data stored in the display basic data storage unit 1023 of the machining shape display unit 102, (X0, Y
0, Z0) is calculated and set as the machining start position.

That is, as shown in FIG. 7 (b), when a plane designated point Ph (X1, Y1) is inputted from the screen coordinate system, the X-axis of the pseudo three-dimensional coordinate system is obtained from the input plane designated point Ph.
A vertical line is lowered on the Y axis, and the X axis coordinate position and the Y axis coordinate position are determined to be (X0, Y0). Next, as shown in FIG. 7 (c), the designated height Pv (X2, Y
In the input of 2), the perpendicular is lowered to the Z axis, the Z axis coordinate position of the pseudo three-dimensional coordinate system is determined, and the true three-dimensional coordinate position is (X0,
Y0, Z0).

Returning to FIG. 1, the description of the operation of the numerical control apparatus will be continued. The machining start position calculated by the input processing unit 105 is calculated by the motor moving position calculating unit 106 and the display moving position calculating unit 1.
021.

The motor movement position calculation unit 106 creates interpolation data based on the processing start position notified from the input processing unit 105 and the current motor position, and notifies the motor interpolation unit 107 of the interpolation data.

The motor interpolating unit 107 operates the motor 10 according to the interpolation data notified from the motor moving position calculating unit 106.
8 to move the tool to the machining start position.

The display movement position calculation unit 1021 stores the processing start position notified from the input processing unit 105 as the display start position in the display basic data storage unit 1023, and updates the current display position to the processing start position.

In this embodiment, the plane designation is XY and the height designation is Z. However, the plane designation and the height designation are Y.
Z, X or ZX, Y may be used.

The type of the input device 104 is not limited. For example, a mouse, a keyboard, a touch panel, and the like can be used.

Further, in the present embodiment, the true three-dimensional coordinate position calculated by the input processing unit 105 in FIG.
However, the data may be command data of a numerical control device including one or a plurality of three-dimensional coordinate positions, such as a software limit. The soft limit is a function that prevents the tool of the machine tool from colliding with the machine tool body, and determines the movable range of the tool using software. Here, it is used to define a limit range of a rectangular parallelepiped by designating two three-dimensional points.

Next, another embodiment of the present invention will be described in detail with reference to FIGS. 3 and 8 (divided diagrams (a) and (b)).

Referring to FIG. 3, the second embodiment is similar to the first embodiment.
The difference from the first embodiment shown in FIG. 2 is that the input order of the plane designated point and the height designated point is reversed. Either the plane designated point or the height designated point may be input first.

It is assumed that the display device 103 draws coordinate axes that allow the operator to image a true three-dimensional coordinate system and a planned processing shape of the workpiece (similar to FIG. 7A).

In step 301 of FIG. 3, a designated height point Pv (X2, Y2) indicated by the screen coordinate system is obtained from the input device 104. The screen display on the display device 103 at this time is as shown in FIG.

Next, in the process of step 302, the plane designation point Ph (X2, Y1) indicated by the screen coordinate system is
Obtain from 04. The screen display on the display device 103 at this time is as shown in FIG.

The processing in step 303 is the same as the processing in step 203 in FIG. 2, and a detailed description thereof will be omitted.
Here, Z0 is calculated from X2 and Y2, and X0 and Y0 are calculated from X2 and Y1.

Further, another embodiment of the present invention will be described in detail with reference to FIGS. 4 and 9 (divided diagrams (a), (b), (c)).

Referring to FIG. 4, in the third embodiment, the input designated point data is not defined by two points, namely, a plane designated point and a height designated point, but the X-axis, Y-axis, and Z-axis constituting three dimensions. Are different from the first and second embodiments in that three points for determining the coordinate position are used.

Determining the coordinate positions of the X, Y, and Z axes 3
In the case of points, there is no restriction on the input order.

It is assumed that the display device 103 draws coordinate axes that allow the operator to image a true three-dimensional coordinate system and a planned processing shape of a workpiece.

In the process of step 401 in FIG. 4, an X-axis designated point (X
1, Y1) from the input device 104. The screen display on the display device 103 at this time is as shown in FIG.

Next, in the process of step 402, the designated Y-axis point (X2, X2,
Y2) is obtained from the input device 104. Display device 1 at this time
The screen display on 03 is as shown in FIG. 9 (b).

Further, in the process of step 403, the Z-axis designated point (X
3, Y3) is obtained from the input device 104 of FIG. The screen display on the display device 103 at this time is as shown in FIG.

In the process of step 404, step 40
1 from the X-axis designated point obtained in step 1, the Y-axis designated point obtained in step 402, and the display basic data stored in the display basic data storage unit 1023 of the machining shape display unit 102 in XY of true three-dimensional coordinates. The plane coordinate position (X0, Y0) is calculated, and the XY plane coordinate position (X0, Y) of this true three-dimensional coordinate is calculated.
0), the Z-axis designated point obtained in step 403, and the display basic data stored in the display basic data storage unit 1023 of the processing shape display unit 102 (X0, Y0). , Z0) is calculated and set as the machining start position.

[0062]

As described above, according to the present invention, 1
While looking at the three-dimensional object displayed in the pseudo three-dimensional coordinate system on the display device screen, which is two two-dimensional planes, the simple operation of simply specifying two points, a plane designated point and a height designated point, from the input device is automatically performed. Since the true three-dimensional coordinate position information is obtained, the processing means (motor or the like) can be easily moved to the processing start point position of the workpiece using the true three-dimensional coordinate position information. Similarly, when three points on pseudo three-dimensional coordinates are input, true three-dimensional coordinate position information can be automatically obtained.

Thus, the operator can calculate the movement amount on the desk from the position coordinate display of the cursor on the display device to create the movement control data based on the position coordinate display of the cursor on the display device, and further, the movement control data from the input device of the numerical control device. And moving the motor to the machining start point is omitted, the moving operation is simplified, and the operability is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a numerical controller according to the present invention.

FIG. 2 is a diagram illustrating an example of an operation flow of an input processing unit illustrated in FIG. 1;

FIG. 3 is a diagram illustrating another example of the operation flow of the input processing unit illustrated in FIG. 1;

FIG. 4 is a diagram showing still another example of the operation flow of the input processing unit shown in FIG.

FIG. 5 is a diagram showing a relationship between a screen coordinate system and a pseudo three-dimensional coordinate system.

FIG. 6 is a diagram showing a configuration of a pseudo three-dimensional coordinate system.

FIG. 7 (a) is a screen state diagram when a coordinate axis capable of imaging a true three-dimensional coordinate system or a workpiece is drawn, and FIGS. 7 (b) and 7 (c) are planes on the screen coordinate system, respectively. It is a screen state diagram at the time of commanding a designated point and a designated height.

FIGS. 8A and 8B are screen state diagrams when a height designation point and a plane designation point are commanded on the screen coordinate system, respectively.

FIGS. 9A, 9B, and 9C are screen state diagrams when an X-axis designated point, a Y-axis designated point, and a Z-axis designated point are commanded on the screen coordinate system, respectively.

FIG. 10 is a diagram showing a general outline of a machine tool using a numerical control device.

[Explanation of symbols]

 101 machining command control unit 102 machining shape display unit 103 display device 104 input device 105 input processing unit 106 motor movement position calculation unit 107 motor interpolation unit 108 motor 1021 display movement position calculation unit 1022 display interpolation unit 1023 display basic data storage unit

Continued on the front page (72) Inventor Mamoru Hirono 5-7-1 Shiba, Minato-ku, Tokyo Inside NEC Corporation

Claims (7)

[Claims] 1. A numerical control device for performing three-dimensional position control of a control object based on coordinate position information input from the outside, wherein a true three-dimensional orthogonal coordinate system is displayed on one two-dimensional plane of a display device screen. Using a pseudo three-dimensional coordinate system in which a solid is pseudo-three-dimensionally displayed by the projection projection method, only two-dimensional coordinate position information of two points, a plane designated point and a height designated point, corresponding to the screen is input. And a means for obtaining coordinate position information in the true three-dimensional orthogonal coordinate system. 2. The control object comprises a processing means and a workpiece whose shape is processed by the processing means,
A display means for converting a processing target shape of the workpiece in a true three-dimensional coordinate system into a pseudo three-dimensional coordinate system and displaying the converted workpiece; and a plane designation point and a height designation point while displaying on the display means.
Input means for designating two-dimensional coordinate position information of a point; and input processing means for analyzing two two-dimensional coordinate position information input from the input means and converting it into one true three-dimensional coordinate position information. The numerical control device according to claim 1, wherein: 3. A machining command control unit for controlling a machining command issued from the outside and converting it into machining command position data, and a machining for calculating a pseudo three-dimensional coordinate system position based on the machining command position data and performing display control. A shape display unit, a display device for displaying a planned processing shape on a pseudo three-dimensional coordinate system under the control of the processing shape display unit, an input device for inputting a position of a two-dimensional plane on the display device, An input processing unit that analyzes input data from the input device and outputs the data to the machining shape display unit and a motor movement position calculation unit described below; a motor that moves the machining means or the workpiece; and a movement position of the motor. And a motor movement position calculation unit for calculating the movement and performing movement control via the motor interpolation unit.
Numerical control device as described. 4. The processing shape display unit includes a display movement position calculation unit, a display interpolation unit, and a display basic data storage unit, and the display movement position calculation unit is notified from the processing command control unit. Pseudo three-dimensional coordinates from processing command position data and display basic data that is conversion constant data for displaying a solid on a true three-dimensional coordinate system stored on the display basic data storage unit on a two-dimensional screen. Calculate the system position, create display interpolation data by comparing with the current display position, notify the display interpolation unit, and the display interpolation unit displays the display according to the display interpolation data notified from the display movement position calculation unit. 4. The numerical control device according to claim 3, wherein the processing target shape is displayed on the device, and the display basic data storage unit stores display basic data determined at the start of displaying the processing target shape. 5. A method for inputting three-dimensional coordinate position information in a numerical control device for performing three-dimensional position control of a control object based on coordinate position information input from outside, comprising: a true three-dimensional orthogonal coordinate system; Is displayed as a pseudo three-dimensional coordinate system in which a solid is pseudo-three-dimensionally displayed by projection on one two-dimensional plane of the display device screen, and a plane designated point on the screen corresponding to the pseudo three-dimensional coordinate system is displayed. And the specified height 2
A three-dimensional coordinate position input method, characterized in that when two-dimensional coordinate position information of a point is input, these two two-dimensional coordinate position information are analyzed and converted into one true three-dimensional coordinate position information. 6. Stores display basic data, which is conversion constant data for displaying a solid on a true three-dimensional coordinate system on a two-dimensional screen, and converts a machining command issued from the outside into machining command position data. Then, a pseudo three-dimensional coordinate system position is calculated from the display basic data and the processing command position data, a display interpolation data is created by comparing with the current display position, and processing is performed on the display device according to the display interpolation data. The three-dimensional coordinate position input method according to claim 5, wherein a shape is displayed. 7. A numerical control device for performing a three-dimensional position control of a control object based on coordinate position information input from the outside, wherein a true three-dimensional orthogonal coordinate system is displayed on one two-dimensional plane of a display device screen. A pseudo three-dimensional coordinate system in which a solid is pseudo-three-dimensionally displayed by a projection method is used, and two-dimensional coordinate position information of each of three designated points on each dimension axis of the pseudo three-dimensional coordinate system is input. A numerical control device having means for obtaining coordinate position information in the true three-dimensional orthogonal coordinate system only with the use of the numerical control device.