JP3066646B2 - Motion simulation system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation simulation system for a numerical control device such as an NC machine tool, and more particularly to an operation simulation system suitable for checking an NC machining program. .

[Prior Art] A device whose operation is controlled by numerical control, for example,
In an NC machine tool or the like, machining of a workpiece is performed by sequentially instructing and controlling the position of a tool with respect to the workpiece based on numerical information given by a machining program provided in advance. According to such a method, the processing of the work can be automatically executed with high accuracy.

In order to execute a target operation by NC control, an operation control program needs to be correctly created.
Therefore, in this type of NC control, it is necessary to monitor whether an object, for example, a tool, operates in a correct positional relationship with respect to a workpiece. Further, it is preferable to check the operation control program before executing the actual operation.

Conventionally, such a check of the NC machining program is disclosed in, for example, Japanese Patent Application Laid-Open No. 58-165111.

This publication discloses a method of displaying a state of processing a material based on an NC processing program on a three-dimensional graphic display. That is, in a numerical control processing method including a display for displaying processing information, a numerical control processing method for three-dimensionally displaying processing information on a display is disclosed. In this method, at least one of the current position of the tool, the processing locus of the tool, and the finished shape of the workpiece is selected as the processing information. Also,
The relative positional relationship between the workpiece and the viewpoint and the direction of the visual field can be changed.

Japanese Patent Application Laid-Open No. 62-192857 describes a robot simulation.

The gazette states that by computer graphics,
In a robot simulation system for programming a robot's work operation offline, octree data of the robot's work environment is created by an arithmetic unit, and this octree data is stored in a storage device. Disclosed is a device provided with a search-dedicated logic circuit for searching for a node, wherein an interaction between an environment and a robot is analyzed by calculation.

[Problems to be Solved by the Invention] However, the above-mentioned conventional technologies have the following problems, respectively. Devices for controlling the operation by numerical control, in particular, for simulating a machining program of an NC machine tool. Is not suitable.

That is, when machining a workpiece with an NC machine tool or the like, it is necessary to grasp the relative positional relationship between the tool and the workpiece every moment from the viewpoint of the machining shape, machining accuracy, accident prevention, and the like. However, according to the first related art, a processing state is displayed three-dimensionally based on processing information such as a position of a tool. However, this is only a processing path of a tool for a material. . No consideration is given to displaying both the tool and the material together and simultaneously displaying the change in the relative positional relationship between them both three-dimensionally. For this reason, it is only possible to simulate the processing state of the material, but not to confirm the operation of the NC processing program.

Therefore, in the above-described conventional technique, the relative positional relationship between the tool and the workpiece is constantly grasped by monitoring the operation of the actual machine.

However, the operation check using the actual device has problems in terms of workability and safety. The solution in this regard has been an issue.

Next, the second prior art discloses a robot simulation system for off-line programming of the operation of a robot working in a complicated work environment. This system analyzes the interaction between the environment and the robot. However, it only takes into account the relative relationship between the robot and the environment. No consideration is given to the operator's viewpoint or the direction of the visual field.

In the case of a machine tool, it is necessary to know how a material is processed from various directions. However, in the above-mentioned conventional technology, the viewpoint and the visual field cannot be specified,
It has to be displayed from a certain direction. However, there is a problem in that it is impossible to confirm the operation of a portion that cannot be hidden by only displaying from a certain direction, and that accurate confirmation cannot be performed.

For this reason, the development of a simulation system that can easily confirm the operation from an arbitrary viewpoint or the direction of the visual field has been an issue.

An object of the present invention is to use a graphic display system, a control operation state according to an NC control program, and in particular, an operation state of an NC machine tool according to an NC machining program, which allows an operation simulation system to be checked from any position. Is to provide.

Means for Solving the Problems To achieve the above object, according to the present invention, in an operation simulation system for simulating and displaying a machining operation in a machine tool, a machine tool, a tool of the machine tool, and machining For each object of the material to be processed, on a local coordinate system for each object, object figure data creating means for creating figure data in which each shape is expanded into a three-dimensional figure, and a machining operation of the machine tool. A program analysis processing unit that analyzes a machining operation procedure of a machining program to be controlled and creates data indicating movement of each object; and specifies externally a viewpoint position and a view direction with respect to the machining operation simulation to be displayed. Receiving means; and the respective object diagrams based on the specified viewpoint position and viewing direction. Performs coordinate transformation of the data,
Means for creating display data of a figure seen in the direction of view among each object figure, and display means for displaying an object based on the display data, wherein the means for creating the display data specifies a viewpoint position. The state of the figure of the object being stopped is stationary, and in accordance with the movement of the object in the data indicating the movement of the object, the state of the figure of another object moving with respect to the stationary figure is displayed. An operation simulation system characterized by creating display data is provided.

[Operation] The operation of the present invention will be described by taking a case where a simulation of a machining program of a machine tool is performed as an example.

The means for creating the shape data of the machine tool expresses the shape of the machine by a combination of three-dimensional figures (cubes, cuboids, cylinders, spheres, etc.). In this case, the data has a data structure capable of clearly expressing the positional relationship between the individual three-dimensional figures.

The means for analyzing the NC machining program reads the NC machining program, obtains the movement axis and the movement amount, and passes the movement axis and the movement to the means for performing the coordinate conversion.

The means for recognizing the operator's viewpoint and viewing direction is a diagram showing the entire configuration of the machine tool displayed on the display, for example, for a perspective view, inputting a position instruction via a keyboard and a mouse, and Information on the operator's viewpoint position and the direction of the visual field is passed to the means for performing the coordinate conversion.

Thus, the means for performing the coordinate conversion uses each axis (x
(Axis, y-axis, z-axis, etc.)

In the case of having a function of determining interference, the means performs a set operation between the three-dimensional figures using the display data created by the means to determine whether or not there is interference. The display color of the part is changed to a different color and displayed. Further, even when the position exceeds the preset movement limit position of the machine tool, processing for displaying the abnormality is performed.

According to the present invention, the operation of the machine tool can be three-dimensionally displayed on the graphic display based on the NC machining program, and the operation of the machine tool can be confirmed while arbitrarily changing the viewpoint position of the operator, so the points are narrowed down.
NC processing program can be checked.

For example, when the viewpoint of the operator is set arbitrarily outside the machine, on the material, or above the tool, and the operation simulation is performed, the following is obtained.

(1) When the viewpoint position of the operator is set outside the machine, the machine, the material, and the tool appear to move. Therefore, it is possible to check a machining program with an image of actual machining.

(2) When the viewpoint position of the operator is set on the material, the material appears to be stationary and the tools and the machine move. Therefore, it is possible to check with the image when the NC machining program was created. NC machining program
Since the program creator assumes that the material is fixed and programs how to move and process the tool, it is desirable that the check be performed with the material fixed. In the present invention, this can be realized.

(3) When the viewpoint position of the operator is set on the tool, the material and the machine appear to move while the tool is stationary. Therefore, it is possible to easily confirm the state of interference between the tool and the material. When processing the surface part of the material, the appearance of interference can be confirmed even if the viewpoint position is set outside the machine, but when processing the inside of the material with a hollow, In this case, since the tool cannot be seen, it is difficult to confirm interference between the tool and the material. In this regard, in the present invention, this can be easily achieved.

As described above, according to the present invention, there is no need to actually operate a machine to check a program after creating a machining program as in the related art, thereby improving the efficiency of creating a machining program and ensuring the safety of a program check operation. .

Examples Examples of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration of an embodiment of an operation simulation system for an NC machine tool to which the operation simulation system of the present invention is applied.

The system according to the present embodiment includes an engineering workstation (EWS) 16 that executes various calculations for simulation, operation control of the system, and the like, a graphic display device 13 that displays the operation of a machine tool, and an input that inputs instructions and the like. It has a keyboard 14 and a mouse 15 functioning as a unit.

The graphic display device 13 includes a color CRT,
The driving device is configured as a main element, and displays image data sent from the engineering workstation 16.

The engineering workstation 16 is a kind of information processing apparatus, and although not shown, for example, one or more processors, a memory for storing an operation program of the processors and setting a work area, and an external It has an I / O interface for inputting and outputting data, and an external storage device, which is a type of I / O device, connected via the interface.

One or two or more external storage devices can be connected, such as a magnetic disk device,
An optical disk device, a magnetic tape device, or the like can be used. An NC processing program to be simulated, machine tool data, material data, tool data and jig data are registered and stored as files 1 to 6, respectively, in a recording medium at least readable by the external storage device. . Then, the program and data are supplied to the engineering workstation 16 from a recording medium for recording this file via an external storage device.

The NC machining program is data for performing an operation simulation. This NC machining program 1
As described above, a computer created by another computer or the like is registered in the NC machining program file 1 in advance. The machine tool data, material data, tool data, and jig data are data to be subjected to an operation simulation, and as described above, the corresponding files 2 to 5
Register in. These data can be registered in a plurality of types. At the start of the simulation, by appropriately selecting each of the NC machining program, the machine tool, the material, the tool, and the jig, the operation simulation can be realized in an arbitrary combination.

The NC processing program and various data may be created by the engineering workstation 16 constituting the present system, or may be created by another system. These are taken into the memory of the engineering workstation 16 as needed. The NC machining program file 1 and the various data files 2 to 5 are conveniently stored in the internal hard disk device of the engineering workstation 16 when the system is started or at all times.

Further, the external storage device also supplies an operation program of the system of the present embodiment, and a necessary program is loaded into the memory when the system is started. The engineering workstation 16 realizes various functions by causing a processor to execute a program stored in the memory. That is, the respective functions of the NC machining program analysis unit 6, coordinate conversion unit 7, display data creation unit 8, interference determination unit 9, machine tool structure data creation unit 10, viewpoint position setting unit 11, and display screen control unit 12 are executed. .

These programs are stored in a storage medium at least readable by an external storage device. That is, these programs are expressed in the form of digital data, and are recorded in the recording area of the medium by causing physical changes such as magnetic, optical, and electrical.

Note that, among the programs, general-purpose programs may be supplied separately from the programs unique to the present invention. For example, in the case of the present embodiment, a general-purpose graphic program can be used as a program for executing the display screen control unit 12.

Therefore, the present embodiment supplies an NC workstation program to be simulated and various data such as machine tool data as files to an engineering workstation having a graphic processing function or an information processing apparatus similar thereto, and A program for realizing the functions of the NC processing program analysis unit 6, the coordinate conversion unit 7, the display data creation unit 8, the interference determination unit 9, the machine tool structure data creation unit 10, and the viewpoint position setting unit 11 using the recording medium. By supplying, an operation simulation system can be configured.

The NC machining program analysis unit 6 reads an NC machining program to be simulated from the NC machining program file 1 and analyzes it. This analysis is performed to extract, from the NC machining program described in a specific language, data such as a movement axis and a movement amount that sequentially change according to the machining process, as data in a format that can be handled in the system of the present embodiment. The analysis result is stored in a coordinate axis operation data file provided in the memory. In the system of this embodiment, if the NC machining program can be handled as data as it is, this analysis can be simplified or omitted.

The machine tool structure data creating unit 10 fetches necessary data from the machine tool data file 2, the material data file 3, the tool data file 4, and the jig data file 5, and converts them into a cube, a rectangular parallelepiped, a cylinder, a sphere, etc. To three-dimensional figures. Here, each figure is defined on a local coordinate system.

The viewpoint position setting unit 11, the position specification data input by the mouse 15, and the view direction specification data input by the keyboard 14, via the display screen control unit 12 described later,
Read. Then, a local coordinate system serving as a viewpoint position is selected, and a direction vector in a viewing direction is calculated.

The coordinate conversion unit 7 is configured to sequentially change the movement axis and the movement amount analyzed by the NC machining program analysis unit 6, the machine structure data created by the machine tool structure data creation unit 10,
Based on the viewpoint position and the viewing direction defined by the viewpoint position setting unit 11, coordinate conversion of each local coordinate system is performed, and the origin position of each local coordinate system based on the viewpoint position is calculated.

The display data creation unit 8 stores the display data after the coordinate conversion by the coordinate conversion unit 7 in the display data file 8a. This display data file 8a is provided in the aforementioned memory.

The interference determination unit 9 reads the display data created by the display data creation unit 8 from the display data file 8a,
A set operation of the three-dimensional figures defined in each local coordinate system is performed, and the presence or absence of overlapping areas is checked to determine the presence or absence of interference. Interference means, for example, that the tool contacts another part of the machine tool or overlaps the material more than necessary. If such interference exists, machining cannot be performed accurately. In severe cases, there is a danger of accidents such as damage to tools and machines.

When the occurrence of interference is detected, the display color information of that part is reset to information of a different color. The display color is also reset when an operation exceeding the movement limit of the machine, which is set in advance for each local coordinate, is performed.

The display screen controller 12 is a function provided in the engineering workstation 16 and performs three-dimensional display on the graphic display device 13 by using the display data, and receives data from the keyboard 14 and the mouse 15. Accept input.

Next, the operation of the present embodiment will be described with reference to FIG. 1 and other drawings.

First, the function of the coordinate conversion unit will be described with reference to FIG.

In FIG. 2, machine tools to be displayed in a three-dimensional manner are displayed by three-dimensional figures 23 to 27.

The three-dimensional figures 23 to 27 displayed in FIG. Machine tools
It is configured to include a bed 23, a saddle 24, a traverse 25, and a headstock 26. A tool 28 is provided on the spindle of the headstock 26. A material 27 is placed on the traverse 25.

Each part of the machine tool displayed like this,
Local coordinate system 18, 19, 20, 2 consisting of rectangular coordinate system of x, y, z
1,22 are defined. The reference coordinate system 17 is a coordinate system that defines the operator's viewpoint position and the view direction, and the origin is the operator's viewpoint position, and the direction defined by the x, y, and z axes represents the operator's view direction.

The local coordinate system 18, 19, 20, 21 based on the information of the movement axis and the movement amount generated by the NC machining program analysis unit 6 in FIG.
, And the directions of the x, y, and z axes change. Accordingly, the positions of the three-dimensional figures 23, 24, 25, 26, 27, and 28 defined on the local coordinate systems 18, 19, 20, 21, and 22 also change, so that the graphic display device 13 shown in FIG. Above,
Machine appears to work.

As described above, the coordinate conversion unit 7 shown in FIG.
The origin positions of the local coordinate systems 18, 19, 20, 21, and 22 and the directions of the x, y, and z axes with respect to are calculated.

Next, a case where the viewpoint position of the operator changes will be described.

For example, when the operator's viewpoint is set in the local coordinate system 20, the local coordinate system 20 becomes a reference coordinate system and is fixed. That is, the origin positions of the local coordinate systems 17, 18, 19, 21, 22 with respect to the coordinate system 20, and x, y,
Since the z-axis direction is calculated, on the graphic display device 13, the three-dimensional figure 27 representing the material is stationary, and the other three-dimensional figures 23, 24, 25, 26, and 28 appear to move.

Next, an example of an image displayed on the display screen 30 of the graphic display device 13 will be described with reference to FIG. 3 and FIG.

Since the graphic display device 13 of the present embodiment can simultaneously display a plurality of screens by the multi-window function, the display screen 30 displays a perspective view screen 31 that provides a bird's-eye view of the entire machine and a situation that can be seen by the operator. A status screen 32 is formed. Thus, an operation simulation can be performed.

In FIG. 3, the mouse cursor is displayed on the perspective view screen 31.
By setting the position of the operator 35 with 33 and further inputting the direction 34 of the visual field from the keyboard, the status screen 32 is displayed.
Is displayed. In this status screen 32, the operator
Since 35 is in the d section, the d section is fixed, and the a, b, c, and e sections move.

Next, in FIG. 4, similarly, by inputting the position of the operator 35 with the mouse cursor 33 and inputting the viewing direction 34 from the keyboard, the state of the status screen 32 is displayed. In the status screen 32, since the operator 35 is in the c section, the c section is fixed, and the a, b, d, and e sections move.

In this way, by arbitrarily setting the position of the operator 35 and the viewing direction 34, the operation status of the machine viewed from the operator 35 is displayed on the status screen 32.

Here, the indication of the viewpoint position by the cursor 33 of the mouse is such that the cursor 33 existing in the view map screen 31 is located.
This can be performed by obtaining a display address in the view map screen 31 and detecting a three-dimensional figure included in the display address.

Next, a flow of processing for realizing the operation of the present embodiment will be described.

FIG. 5 is a flowchart showing the flow of processing of the entire system.

First, when the system is started, various data 63, 64, 6 registered in advance in the files 2 to 5 shown in FIG.
5, 66 are read by the data input processing of steps 41, 42, 43, 44. In step 45, the machine tool structural data
63 is created in the format described in FIG.

Next, an NC machining program 67 created by another computer and registered in advance in the NC machining program file 1 is read in step 46.

In step 47, coordinate axis operation data 68 is created by exchanging the data format used in the simulation system of the present embodiment. In step 48, the coordinate axis operation data
Read data line by line from the top of 68.

In step 49, it is determined whether or not the operator has input a viewpoint position. If there is, the viewpoint position data is read from the graphic display device 13 in step 50. Further, in step 51, it is determined whether or not there is an input of an operator's view direction, and if so, in step 52, view direction data is read. If not, in step 53, the view direction is automatically set to the direction with the tool. Steps
At 54, the position vector of the field of view and the direction vector of the field of view are calculated.

Next, coordinate conversion 55 of the machine tool structure data created in step 45 is performed, and data for displaying a bird's-eye view of the machine tool is displayed.
69 is created (step 56) and stored in the display data file 8a shown in FIG. Further, data 70 for displaying a processing situation viewed from the viewpoint position of the operator is created (step 57), and similarly stored in the display data file 8a.

Next, in step 58, calculation for determining interference between the machine tool and the material, the tool and the material, and the like is performed. If there is interference,
The display color information of that part is set to a different color. Then, in a step 61, the display data 69 of the bird's-eye view of the machine tool and the display data 70 of the machining situation viewed from the viewpoint position of the operator are displayed on the graphic display device 13.

In step 62, it is determined whether or not there is the next coordinate axis operation data 68. If there is, the process returns to step 48 and the processing is repeated.

Next, the operation of the NC machining program analysis unit 6 in this embodiment will be described in more detail with reference to FIG.

First, an NC command for one line is read from the NC machining program file 1 shown in FIG. 1 (step 101). It is determined whether or not the command is a movement command (step 102). If not, it is determined whether or not the command is the next correction command (step 10).
4), if it is not a correction command, move on to a determination as to whether or not it is a speed command (step 106). If not a speed command, move to a determination as to whether it is a hierarchical command (step 108). Here, if the command is not a hierarchical command, the process proceeds to a determination as to whether the command is another command (step 110). If the command is not another command, it is determined whether the machining program is completed (step 112). If the operation is not completed, the above operation is repeated. If the operation is completed, the analyzed coordinate axis operation data 68 is stored in the coordinate axis operation data file 6a (step 113).

In each of the determinations 102, 104, 106, 108, and 110, if the conditions are satisfied, the following operations are respectively performed.

That is, if it is a movement command, the movement position of the tool is set by coordinates (X, Y, Z, U, V, W, A, B, C (step 10).
3). If the command is a correction command, the corrected movement position is set (step 105). If it is a speed command, the moving speed of the tool is set (step 107). If it is a hierarchical command, a subprogram is called (step 109). If it is another command, the process for each of those control commands is executed (step 111).

The sub-program is a program for each routine when the NC machining program is divided into a plurality of routines. The hierarchy command is a command for calling each subprogram. In the case of a machining program having no subprogram, this step can be omitted.

Step 111 is a command unique to the machine tool, such as a tool change, which is different from the machining operation. When this command is issued, the actual machine tool executes an operation corresponding to the command, for example, a tool changing operation. In the simulation of this embodiment, the tool data is read from the tool data file 4, and the graphic data of the machine tool including the new tool is created by the above-described procedure.

Next, the operation of the viewpoint position setting unit 11 in the present embodiment will be described in more detail with reference to FIG.

First, it is monitored whether or not there is an input from the mouse 15 shown in FIG. 1 (steps 201 and 202).
The position data (x ₁ , y ₁ , z ₁ ) designated by 5 is read (step 203). Based on the position data, a local coordinate system where the operator is located is selected (step 20).
Four).

Next, it is determined whether there is an input from the keyboard 14 shown in FIG. 1 (step 205). If there is input,
The data (x ₂ , y ₂ , z ₂ ) in the viewing direction is read from the keyboard 14 (step 206). On the other hand, when there is no input from the keyboard 14, the view direction is automatically set to the direction of the tool (step 207).

Next, a direction vector of the operator's viewing direction is calculated according to the set viewing direction (step 208).

Next, the operation of the coordinate conversion unit 7 and the display data creation unit 8 in this embodiment will be described in more detail with reference to FIG.

 The coordinate conversion unit 7 operates as follows.

The coordinate axis operation data is read from the coordinate axis operation data file 6a, and an interpolation calculation for dividing the start and end points of the axis operation into a plurality is performed (steps 301 and 302).
Thereby, the axis operation can be smoothly displayed.

Next, it is checked whether or not the read coordinate axis operation data includes axis data, and if so, whether it is a linear axis or a rotation axis is checked (steps 303 and 304). If it is a rotation axis, a rotation matrix is calculated (step 305).
The linear movement amount is calculated (step 306). Then, a conversion matrix is set based on those results (step 307). On the other hand, if there is no axis data, these steps are skipped.

Then, it is determined whether or not the conversion for each axis has been completed. If the conversion has not been completed, steps 303 to 307 are repeated. On the other hand, if the conversion has been completed, the process moves to the next display data creation unit 8 (step 308).

The display data creation unit 8 first checks whether or not this processing is the first processing, and if so, creates display data of a bird's eye view (step 310). The created data is stored in the display data file 8a. This bird's eye view
Since it is displayed statically, after creating it for the first time, store it in a file, read it out, and use it. on the other hand,
If it is not the first processing, display data is created in the view direction after the movement (step 311). This is created constantly as it changes from moment to moment.

In the created display data, the size of the screen, the display position, and the like are set (step 312), and the display size and the display position of the machine are set (step 313). Further, as shown in FIGS. 3 and 4, a setting for displaying the operator's view direction 34 is made in the perspective view screen 31 (step 314).

Next, it is checked whether or not the interpolation for the display data has been completed. If not, the steps 303 to 314 are repeated (step 315). That is, it is checked whether or not the display data corresponding to the interpolation value set by the interpolation calculation has been created.

Further, it is checked whether or not the coordinate axis operation data for which the display data is to be created has been completed.
Repeat 301-315. Then, if the processing has been completed, this processing ends (step 316).

In this way, according to the present embodiment, regarding the operation simulation of the NC machine tool, the screen of the machining status can be displayed by designating an arbitrary viewpoint and the direction of the visual field, so that the tool and the material which were conventionally difficult Can be observed from all angles, such as from the viewpoint of the tool, the viewpoint of the material, and the like. For this reason, the processing state can be grasped without producing a blind spot, and the processing shape, processing accuracy, interference, and the like can be examined in advance regardless of the actual machine. Therefore, the NC processing program can be checked easily, reliably, and completely.

The embodiments described above are only one embodiment of the present invention. The present invention is not limited to this. Hereinafter, some modified examples will be exemplified.

First, examples of the display screen include the following.

In the above embodiment, two types of screens, a perspective view screen and a status screen, are displayed on the display screen of the graphic display device by the multi-window technique. The present invention is not limited to this, and it is possible to set more screens. For example, a plurality of status screens may be provided to simultaneously display operations in different viewpoints and viewing directions, such as the front and back of a machine tool, tools and materials, and the like.

The view map screen may be displayed only when the viewpoint position is set, and may not be displayed at other times. Further, the viewpoint position may be set on an arbitrary screen. Furthermore, the initial setting may be a view map screen, and after the setting, the setting can be performed on the situation screen. According to this, the visual field map screen need only be displayed first. In such a case,
It is not necessary to display by a multi-window.

In addition, in the present invention, an enlargement / reduction function may be provided to display the image at an arbitrary scale.

Further, the configuration may be such that the instruction of the viewpoint and the viewing direction is performed using an icon.

Second, the present invention is applicable not only to the operation simulation of the NC machine tool but also to other objects requiring the same simulation.

[Effects of the Invention] As described above, according to the present invention, the control operation state according to the NC control program, particularly the operation state of the NC machine tool according to the NC machining program, is used for a graphic display system from an arbitrary position. There is an effect that an operation simulation that enables confirmation can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system configuration of one embodiment of an operation simulation system of the present invention, and FIG. 2 is a perspective view showing a relationship between a three-dimensional display example of a machine tool to be simulated in the present embodiment and a coordinate system. FIG. 3, FIG. 3 and FIG. 4 are perspective views each showing an example of a display screen of a graphic display device used in the operation simulation of the present embodiment, FIG. 5 is a flowchart showing a processing procedure of the operation simulation of the present embodiment, FIG. 6 is a detailed flowchart showing the operation of the NC machining program analysis unit of the embodiment, FIG. 7 is a detailed flowchart showing the operation of the viewpoint position setting unit of the embodiment, and FIG. 8 is a coordinate conversion unit of the embodiment. 5 is a detailed flowchart showing the operation of a display data creation unit. 1 ... NC machining program file, 2 ... Machine tool data file, 3 ... Material data file, 4 ... Tool data file, 5 ... Jig data file, 6 ... NC machining program analysis unit, 7 ... Coordinate conversion unit 8, display data creation unit 9, interference determination unit 10, machine tool structure data creation unit 11, viewpoint position setting unit 12, display screen control unit 13, graphic display Device, 14… keyboard, 15… mouse, 16… engineering workstation, 17,18,19,20,21,22 …… coordinate system, 23,2
4,25,26,27,28 …… Three-dimensional figure, 30 …… Display screen, 31 ……
Perspective view screen, 32 ... Status screen, 33 ... Cursor, 34 ...
Viewing direction, 35 ... operator.

Continuing from the front page (72) Inventor Yasumasa Kawashima 4026 Kuji-cho, Hitachi City, Ibaraki Prefecture Inside Hitachi, Ltd.Hitachi Research Laboratory Co., Ltd. References JP-A-58-165112 (JP, A) JP-A-59-36810 (JP, A) JP-A-62-92003 (JP, A)

Claims (2)

(57) [Claims] 1. An operation simulation system for simulating and displaying a machining operation in a machine tool, comprising: a local coordinate for each of the machine tool, a tool of the machine tool, and a material to be machined; On the system, an object figure data creating means for creating figure data in which each shape is developed into a three-dimensional figure, and analyzing a machining operation procedure of a machining program for controlling a machining operation of the machine tool, Program analysis processing means for creating data indicating movement, means for receiving an external designation of a viewpoint position and a viewing direction regarding the processing operation simulation to be displayed, and, based on the designated viewpoint position and the viewing direction,
While performing the coordinate transformation of each of the object graphic data, means for creating display data of a figure that can be seen in the direction of view among each object graphic, and display means for displaying an object based on the display data, The means for creating the display data is such that the graphic of the target whose viewpoint position is specified is stationary, and the graphic of another target is displayed in accordance with the movement of the target in the data indicating the movement of the target. A motion simulation system characterized by generating display data for displaying a moving state of a stationary figure. 2. The motion simulation system according to claim 1, wherein the means for receiving the designation of the viewpoint position and the view direction comprises:
Means for accepting a plurality of viewpoint positions and viewing directions, and creating the display data, the display data corresponding to the plurality of designated viewpoint positions and viewing directions, creating display data based on each of the plurality of display data, The operation simulation system, characterized in that the means has a multi-window function of providing a plurality of windows corresponding to the number of the created display data and performing display by the corresponding display data.