JPH0643924A - Unit and device for controlling nc machine tool - Google Patents

Abstract

PURPOSE:To easily generate control codes to be imparted to the NC machine tool. CONSTITUTION:Graphic data representing a figure including a specific work path where the NC machine tool performs machining by the combination of segments and circles are generated by a CAD device 200 and stored in a graphic data storage means 10. On the screen of a display 20, the figure based upon the graphic data is displayed. An operator specifies and inputs repeating points and paths on the work path in the displayed figure by using a mouse 40. A work path recognizing means 30 traces the figure according to the specification input from the mouse 40 to recognize the work path. A code generating means 50 generates the control codes to be supplied to the NC machine tool according to the recognized work path.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an NC machine tool control device and control method, and more particularly to a computer utilizing an NC.
The present invention relates to an apparatus and method for creating a control code given to a machine tool.

[0002]

2. Description of the Related Art NC machine tools are used for various purposes because they can be freely machined along desired work paths. The NC machine tool which is generally used at present is controlled by a control code configured by arranging a set of data (xi, yi, ri) continuously. Here, xi and yi are coordinate values indicating the position of one point, and ri indicates the radius of curvature of the path from the previous point to that point. That is, one set of data (xi, yi, ri) is “coordinate value (xi-1, yi-1).
From the point of to the point of coordinate value (xi, yi), the radius of curvature r
It corresponds to the instruction that "processing can be performed while moving along the curve of i". When the radius of curvature is infinite, that is, when the path is a straight line, ri is generally omitted. In this way, the NC machine tool repeats the operation of machining between two points along an arc or a straight line. As described above, in order to control the NC machine tool, it is necessary to generate a series of data strings as described above and supply them to the NC machine tool.

[0003]

As described above, in order to cause the NC machine tool to perform the desired machining, it is necessary to create a dedicated control code and give this control code to the NC machine tool to perform control. There is. However, conventionally, an operator creates the control code based on the drawing of the object to be processed, so that in the case of performing complicated processing, a great deal of labor and time are required to create the control code. .

Therefore, an object of the present invention is to provide a control device and a control method for an NC machine tool that can easily create a control code to be given to the NC machine tool.

[0005]

[Means for Solving the Problems]

(1) A first invention of the present application is a graphic data storage means for storing graphic data representing a graphic including a predetermined working path to be machined by an NC machine tool by a combination of line segments and circles, and the graphic data. Based on the position coordinates input by the coordinate input means, a display means for displaying a figure based on the display means, a coordinate input means for inputting position coordinates on the display screen by the display means, A work path recognition means for recognizing a work path formed by a part of a circle, and a code creation means for creating a control code to be given to the NC machine tool based on the work path recognized by the work path recognition means, Is provided.

(2) A second invention of the present application is, in a method for creating a code for controlling an NC machine tool by using a computer, a figure including a predetermined machining path to be machined by the NC machine tool. , A first preparation step of preparing graphic data expressed by a combination of line segments and circles, a second preparation step of calculating an intersection position of the figures based on the prepared graphic data, and the prepared graphic data After performing the three preparatory steps of displaying a graphic based on the display screen on the display screen, the first trace step of inputting a designated point designated by the operator on the display screen is input. A second trace stage that extracts intersections, line segment endpoints, and arcs that exist near the specified point, and an intersection or endpoint is extracted in this second trace stage In the third trace stage, these points are registered as new relay points, and when an arc is extracted, this arc is registered as a new route.
Repeating one trace step registers the relay points and routes.For the routes between relay points where arcs are registered, the arcs for them are straight lines, and for the routes between relay points that are not registered, straight lines, respectively. A code for controlling the NC machine tool is created by recognizing it as a work path connecting the relay points.

(3) The third invention of the present application is the control method according to the above-mentioned second invention, wherein in the second tracing step, a circle having a preset radius as a center is set as a search area. The intersections defined within this search area,
The endpoints and arcs of the line segments are selected in this order with priority, and when only one target object is selected, this selected target object is extracted and a plurality of target objects are selected. In this case, extraction is not performed on any of the objects.

[0008]

[Operation] The basic idea of the present invention is to create a control code for an NC machine tool based on graphic data created by CAD or the like. Recently, with the spread of personal computers, it has become possible to easily perform graphic design by CAD. Therefore, first, the work path of the NC machine tool is expressed by a combination of line segments and circles using CAD. That is, CAD
Create figure data by. Then, the control code is created by converting the graphic data into the control code. Usually, the graphic data created by CAD includes not only the original work route but also an extra route.
In order to completely automate the process of extracting the original working path from such graphic data, a very sophisticated and complicated program is required. In view of this, in the present invention, the graphic created by CAD is displayed on the display, and the original work path is extracted based on the instruction input from the operator. Since the operator may perform the work of designating a point to be extracted or a point near the circular arc as the designating point, the control code can be created by a relatively simple work.

[0009]

The present invention will be described below based on illustrated embodiments. FIG. 1 is a block diagram showing the basic configuration of a control device for an NC machine tool according to the present invention. This device is composed of each element surrounded by a chain line indicated by reference numeral 100 in the drawing, and has a function of creating a control code for controlling the NC machine tool 300 based on the graphic data created by the CAD device 200. Have. The CAD device 200 is a device configured by installing general CAD software on a personal computer. Currently, various CAD softwares are used, but in the present invention, a graphic including a predetermined working path to be machined by an NC machine tool can be represented by a combination of line segments and circles.
As long as it is AD software, any software may be used.

The graphic data created by the CAD device 200 is loaded into the graphic data storage means 10. The general CAD device 200 creates graphic data in the form of vector data. Based on the graphic data thus captured, the graphic created by the CAD device 200 is displayed on the screen of the display means (display) 20.
The central component of this device is the work road recognition means 30.
Is. While looking at the graphic displayed on the display 20, the operator inputs an instruction to extract the route included in this graphic by the coordinate input means (mouse) 40. Specifically, the extraction target object is specified by specifying the position coordinates on the screen of the display 20 with the mouse 40. The work road recognition means 30 extracts a line segment or an arc from the graphic displayed on the display 20 based on the position coordinates designated by the mouse 40, and recognizes the work road. This work path is a path that allows so-called one-stroke writing. The code creating means 50 creates a control code for controlling the NC machine tool 300 based on the work path thus recognized.

Each component shown in FIG. 1 can be actually realized by using a personal computer. That is,
The work path recognition means 30 and the code creation means 50 can be realized by installing dedicated software for executing the above-mentioned functions in a personal computer main body (CPU). Further, the graphic data storage means 10 can be realized by an internal storage means or an external storage means connected to the personal computer, and the display 20 and the mouse 40 are input / output devices connected to the personal computer. As described above, CAD
Since the device 200 can also be usually realized by a personal computer, it is convenient to configure the control device 100 and the CAD device 200 by using the same personal computer. That is, the same computer may be caused to function as the control device 100 or the CAD device 200 by switching the software. In this case, the graphic data storage means 10 can be directly used as a storage means for the CAD device 200.

Next, the operation of this control device will be described with reference to the flow charts shown in FIGS. Here, in order to facilitate understanding, an example of creating specific control data for a specific work path will be described. Now, consider a case where a flat plate as a material is processed along a working path L as shown in FIG. When performing such a work, a drawing showing the work path L is usually drawn. Therefore, first, in step S1 in the flowchart of FIG. 2, graphic data is prepared. That is, the CAD device 200 is used to create a graphic pattern including the work path L. A general NC machine tool operates along a straight line,
All machining is performed by two basic operations, that is, and an operation along an arc. Therefore, even when machining is performed along an arbitrary curve, the machining path is divided into some and machining that approximates a straight line and a circular arc is performed. Therefore, the graphic data prepared in step S1 is configured by a combination of straight lines and circles. Specifically, for the work path L shown in FIG. 4, a graphic pattern as shown in FIG. 5 may be created. This figure pattern consists of four line segments AB, BC, CD, DA
It is composed of two circles X and Y having a radius R, and is a figure including the working path L shown in FIG.

When the CAD device 200 can create a graphic pattern as shown in FIG. 5, graphic data corresponding to this graphic pattern is loaded into the graphic data storage means 10. As mentioned above, such graphic data is usually
It is given in the form of vector data. For example, line segment A
The graphic data for B is represented by line segment data specifying the coordinate values of the point A and the point B, and the graphic data for the circle X specifies the coordinate value of the center point D and the radius R. It is represented by circle data. However, in the present invention, the expression by a line segment includes the expression by a straight line or a half line. For example, in FIG. 5, line segment A
As another method of expressing B, a straight line including the line segment AB or a half line may be specified (for example, the coordinate value and the angle of the point B are specified).

Then, in step S2, an intersection calculation is performed. That is, on the basis of the graphic data in the graphic data storage means 10, the intersections of the graphics are specified and their coordinate values are calculated. In the example of FIG. 5, circle X and line segments CD and DA
The intersections D1 and D2 are obtained as the intersections with and the intersections A1 and A2 are obtained as the intersections between the circle Y and the line segments AB and DA.
In addition, the graphic data given from the CAD device 200 is
If such intersection data is already included, it is not necessary to perform the procedure of step S2 again.

In the next step S3, a graphic pattern based on the graphic data is displayed. That is, FIG.
A graphic pattern as shown in (5) is displayed on the screen of the display 20. The operator will perform the designated point input work later while looking at the graphic pattern thus displayed. It should be noted that the alphabetical symbols shown in FIG. 5 are added for convenience of description and are not displayed on the actual screen.

When the above preparatory steps are completed, the trace work for recognizing the work road is finally started. First, in step S4, the work parameter i is set to an initial value 0. In the following trace work, this work parameter i is set to 1
It will be a work to be repeated while increasing each. Before giving a concrete description of the work, an outline of the trace work will be explained. The purpose of this work is to extract while tracing the working path L shown in FIG. 4 on the figure as shown in FIG. The extracted work path L is composed of a series of relay points and a route (line segment or arc) connecting these relay points. Specifically, in the figure shown in FIG. 5, a route passing through a series of relay points C, D1, D2, A2, A1, B, C (this route has the relay point C as a starting point, but an arbitrary relay point Can be set as the starting point.)
The work path L can be configured by. The following work is a work for extracting and registering these relay points and routes between them one by one. Here, the work parameter i corresponds to the number of the relay point registered last. At this stage, no relay point is registered yet, so i = 0
The following initial values are set.

When the tracing work is started, step S5
Then, the process proceeds from step S6 to step S6, where an operation of inputting a designated point is performed (step S5 is a branching process when the extraction of all work paths is completed). This designated point input operation is performed for the purpose of designating a point or a circular arc in the graphic pattern displayed on the screen of the display 20. The designated point is input by the mouse 40. For example, if the mouse pointer is moved to the position of the point P and the mouse button is clicked at this position while the graphic pattern shown by the solid line in FIG. 6 is displayed, the coordinate value of the specified point P is recognized as the work route. Given to the means 30.

On the basis of the input of the designated point P, the work road recognizing means 30 carries out the neighborhood search processing in step S7. That is, a circle centered on the designated point P and having a preset radius r is defined as a search area (area indicated by a broken line in FIG. 6), and processing for extracting points or arcs existing in this search area is performed. (Line segments are not extracted in this embodiment). In the example of FIG. 6, points E1, E2, and
There are four extraction objects, which are arcs Z1 and Z2. Thus, even when a plurality of objects exist in the search area, only one of them is selected and extracted. Which one should be selected should be determined by recognizing the fact that "which object was originally designated by the operator". That is, in FIG.
Which of the four extraction objects, points E1, E2, arcs Z1, Z2 was intended to be specified, "and the object to be selected should be determined.
However, it is very difficult to recognize the facts about the operator's intention. As one method of performing such recognition, there is a method of selecting an object closest to the specified point P by regarding it as an object originally specified by the operator. However, with such a method, it is not always possible to make a selection close to the operator's original intention.
The inventor of the present application has found that the selection method in which points are prioritized over arcs is the most suitable as a result of considering the method of specifying an object for various graphic patterns. For example, in FIG.
In the example, when designating the point E1, it is necessary to designate the vicinity of the designated point P, but when designating the arcs Z1 and Z2, it is not always necessary to designate the vicinity of the designated point P. Specifically, to specify the arc Z1, the specified point P
It is enough to specify the area around ´. Therefore, if arcs and points exist as objects in the search area,
It is more natural for the operator to recognize that he intended to specify a point. It has also been found that even at the same point, it is possible to obtain a better result by giving priority to the intersection point E2 than to the end point E1 of the straight line. Therefore, in this embodiment, when a plurality of objects exist in the search area, they are selected in the priority order of intersection, line segment end point, and arc. Therefore, in the example of FIG. 6, the intersection E2 having the highest priority is
Will be selected.

In the following step S8, a judgment is made as to the number of selected objects. When there are a plurality of objects with the highest priority, it is not possible to select which one should be extracted, so the process proceeds to step S9.
Display an error message to the operator and re-enter the specified point. When the error display is displayed, the operator may perform the work of inputting a position slightly different from the last time as a new designated point. Thus, an object is extracted only if there is only one object with the highest priority.

As described above, the object to be extracted is either a point (end point or intersection of line segments) or a circular arc. The following processing differs depending on whether the extracted object is a point or a circular arc, and a branch is performed in step S10. In the case of a point, after the steps S11 to S14 of FIG.
Increases by 1, and the process returns to step S5. In the case of a circular arc, after step S16 of FIG.
Return to 5. Hereinafter, the procedure shown in FIGS. 2 and 3 will be sequentially described for each stage in which the work parameter i is updated, based on the specific graphic pattern shown in FIG.

In step S8, when the number of objects is 0 (that is, when there are no points or arcs in the search area), the objects cannot be extracted as they are. In such a case, the process may proceed to step S9 to display an error. However, in this embodiment, an object as a point is newly defined at the designated point position at this time, and this newly defined object is defined. A point is extracted as an object and the process proceeds to step S11. Such a function is convenient when setting a work starting point by the NC machine tool. For example, in FIG. 5, CAD
If one point Z outside the figure not included in the figure prepared by the apparatus 200 is designated as the designated point, this designated point Z can be used as the first relay point (working start point) of the working path.
Generally, when the work blade is moved to the work starting point at the start of the work, a trace of the blade may remain in the vicinity of the work starting point. Therefore, if the point Z outside the figure is set as the work starting point, even if such a trace of the blade is generated in the vicinity of the point Z, the portion to be originally processed is not affected at all. in this way,
The fact that the work start point can be set at any position is practically
The operability can be greatly improved. Work parameter i = 0 As described above, the work parameter i is set to the initial value 0 in step S4. First, it is assumed that the operator performs a designated point input operation of designating the designated point P1 of FIG. 7 with a mouse in step S6. This input work is performed for the purpose of registering the point C as the first relay point. Therefore, in practice, the designated point P1 is usually designated at a position substantially overlapping the point C, but here, for convenience of description, a case where the designated point is set at a considerably distant position is shown. When this input work is performed, in step S7, the neighborhood search for the designated point P1 is performed, and the point C
(End point of line segment) is extracted as the only object. Therefore, the process branches from step S10 to step S11.
In step S11, a process of registering this point C as the first relay point is performed. Here, the points registered as relay points will be expressed as points Qn (n = 1, 2, 3, ...). Therefore, in step S11, the point C is registered as the first relay point Q1.

In the subsequent step S12, "provisional route display between i-th relay point and (i + 1) -th relay point" is performed. However, at this point in time, the work parameter i = 0, so there is no 0th relay point. Therefore,
The process of step S12 is not performed at this stage. In a succeeding step S13, "is a route registered between the (i-1) th relay point and the ith relay point?"
Is determined, and if not registered, step S1
4, "straight line registration between (i-1) th relay point and ith relay point" is performed. However, since the work parameter i = 0 at this point, no processing is performed and the process proceeds to step S15. Step S15
Then, the work parameter i is updated to i = 1. Thus,
In the processing for the work parameter i = 0, the point C is the first
Is registered as the relay point Q1 of

Work parameter i = 1 Subsequently, it returns to step S5, and it is assumed that the designated point input work for designating the designated point P2 of FIG. 7 with the mouse is performed in the next step S6. This input work is performed for the purpose of registering the point D1 as the second relay point, and actually, the designated point P2 is set at a position substantially overlapping the point D1. When this input work is performed, in step S7, the neighborhood search for the designated point P2 is performed, and the point D1 is searched.
(Intersection) is extracted as the object. As described above, even when there is another object such as an end point or an arc of a line segment in the search area, the intersection D1 having the highest priority is
Is extracted. Therefore, from step S10 to step S
Branch to 11. In step S11, a process of registering this point D1 as the second relay point Q2 is performed.
In the following step S12, "provisional route display between first relay point Q1 and second relay point Q2" is performed.
Here, "temporary route display" is a process of displaying a straight route as a temporary route between the newly registered relay point and the previously registered relay point. To tell. Specifically, as shown in FIG. 8, the provisional route K1 is provided between the first relay point Q1 and the second relay point Q2.
Will be displayed as a broken line.

In the following step S13, it is determined "whether a route is registered between the (i-1) th relay point and the i-th relay point". If not registered, in step S14. , "Straight line registration between (i-1) th relay point and ith relay point" is performed. However,
At this point in time, the work parameter i = 1, so the 0th relay point is not defined, so no processing is performed and the process proceeds to step S15. In step S15, the work parameter i is updated to i = 2. Thus, in the process for the work parameter i = 1, the point D1 is registered as the second relay point Q2, and the temporary route is displayed between the relay points Q1 and Q2 by a broken line.

Work parameter i = 2 Subsequently, returning to step S5, it is assumed that the designated point input work for designating the designated point P3 of FIG. 9 with the mouse is performed in the next step S6. This input work is performed for the purpose of registering the point D2 as the third relay point. When this input work is performed, in step S7, a neighborhood search for the designated point P3 is performed, and the point D2 (intersection point) is extracted as an object. After all, even if there is another object such as an end point or a circular arc of a line segment in the search area, the intersection D2 having the highest priority is extracted. Therefore, the process branches from step S10 to step S11. In step S11, a process of registering this point D2 as the third relay point Q3 is performed. In a succeeding step S12, "provisional route display between the second relay point Q2 and the first relay point Q1" is performed. That is,
As shown in FIG. 10, a temporary route K2 indicated by a broken line is displayed between the relay point Q2 and the relay point Q3.

In the following step S13, it is determined whether "a route is registered between the first relay point Q1 and the second relay point Q2". As shown in FIG.
At this point, only the temporary route K1 is displayed between the relay points Q1 and Q2, and the official route has not been registered yet. Therefore, in step S14,
"Linear route registration between the first relay point Q1 and the second relay point Q2" is performed. That is, the relay points Q1 and Q2
In the meantime, as shown in FIG. 11, the linear route L1 is officially registered. In the following step S15, the work parameter i =
Updated to 3. Thus, in the process for the work parameter i = 2, the point D2 is registered as the third relay point Q3, the provisional route K2 is displayed between the relay points Q2 and Q3, and further, between the relay points Q1 and Q2. The temporary route K1 is registered as the formal straight route L1. In this embodiment, the officially registered route is indicated by the thick line.

Work parameter i = 3 (No. 1) Subsequently, returning to step S5, it is assumed that the designated point input work for designating the designated point P4 of FIG. 11 with the mouse is performed in the next step S6. This input work is an arc X
This is done for the purpose of registering 1 as a formal route. When this input work is performed, in step S7, a neighborhood search for the designated point P4 is performed, and the arc X1 is extracted as an object. As described above, since the circular arc has the lowest priority, it is necessary to keep in mind that the designated point P4 is designated at a position where another object such as an intersection or an end point of a line segment does not exist nearby. Since the arc is extracted, the process branches from step S10 to step S16. In step S16, “the second relay point Q2 and the third relay point Q are
The process of registering the arcuate path X1 is performed between the position 3 and the position 3. In this way, when the formal route is registered between the two relay points, the provisional route display disappears. That is, the provisional route K2 shown in FIG. 11 disappears, and as shown in FIG. 12, the arc route L2 is registered as a formal route (shown by a bold line). Thus, in the process for the work parameter i = 3 (No. 1), the registration is performed in which the temporary route K2 is replaced with the formal arc route L2.

In the above example, the relay points Q2 to Q3
Although the counterclockwise circular arc route X1 is selected as the route toward, the clockwise circular route can be selected by designating the circular arc X2. As described above, one of the features of this device is that the right-handed route and the left-handed route can be freely selected.

When the work parameter i = 3 ( No. 2) arc is extracted, the arc path is registered in step S16, but the work parameter i is not updated. Therefore, with the work parameter i = 3, the process returns to step S5 again. Therefore, the next step S
6, it is assumed that the designated point input operation of designating the designated point P5 of FIG. 12 with the mouse has been performed. This input work is
This is performed for the purpose of registering the point A2 as the fourth relay point. When this input work is performed, in step S7, the neighborhood search for the designated point P5 is performed, and the point A2
(Intersection) is extracted as the object. Therefore, the process branches from step S10 to step S11. Step S1
At 1, the process of registering this point A2 as the fourth relay point Q4 is performed. In the following step S12, the "third
The tentative route display "is performed between the third relay point Q3 and the fourth relay point Q4. That is, as shown in FIG.
A tentative route K3 indicated by a broken line between the relay point Q3 and the relay point Q4
Will be displayed.

In the following step S13, it is determined whether "a route is registered between the second relay point Q2 and the third relay point Q3". As shown in FIG.
The arcuate path L2 is already registered in this section. Therefore, step S14 is skipped and step S15 is performed.
Is updated to work parameter i = 4. Thus, in the processing for the work parameter i = 3 (part 2), the point A
2 is registered as the fourth relay point Q4, and the provisional route K3 is displayed between the relay points Q3 and Q4.

The process is also quite similar for the working parameter i = 4 operating parameters i = 4. When the operator inputs a specified point with the mouse,
The point A1 is registered as the fifth relay point Q5, and the relay point Q
The tentative route K3 between Q3 and Q4 is registered as a formal straight route L3.

[0032] In the process for operating parameters i = 5 operating parameters i = 5 is performed a designated point input specifying an arc Y1, as shown in FIG. 14, the arc path L4 is registered as a formal route. Subsequently, the point B is registered as the sixth relay point Q6, and as shown in FIG. 15, the provisional route K5 is displayed between the relay points Q5 and Q6.

[0033] In the process for operating parameters i = 6 operating parameters i = 6, as shown in FIG. 15, by inputting the specified point P7, the first relay point Q1 is registered as the relay point Q7 of the 7 It Furthermore,
As shown in FIG. 16, a formal straight line route L5 is registered between the relay points Q5 and Q6, and a provisional route K6 is provided between the relay points Q6 and Q7.
Is displayed.

Work Parameter i = 7 Now all trace work is complete. Therefore,
In step S5, an input indicating the end of tracing is input, and the process proceeds to step S17. In step S17, between the sixth relay point Q6 and the seventh relay point Q7,
The straight path L6 is officially registered. Thus, as shown in FIG. 17, registration of all the routes L1 to L6 is completed.

In the procedure described above, the operator basically has only to perform the work of successively designating successive relay points. Each time a new relay point is designated, a temporary route (straight line) indicated by a broken line is displayed between the relay point and the previous relay point. If this temporary route is a correct route, the next relay point may be designated. Then, the temporary route will be registered as a formal route. If the tentative route is not the correct route, input is made to specify the correct route (arc). Then, the provisional route disappears, and the designated correct arc route is registered as a formal route. The method of registering each relay point and route by such a method is an excellent method with extremely high operability.

Finally, in step S18, a control code is created based on the result of the tracing work.
This control code is an enumeration of data indicating the coordinate values of the relay points and data indicating the radius of curvature of the route formed between the relay point and the previous relay point, and is shown in FIG. It is possible to create uniquely from the result of such trace work. For example, in a control code called G code which is very commonly used, G00: positioning, G01: linear interpolation, G02: circular interpolation clockwise, G
The code definition is 03: circular interpolation counterclockwise. When this G code is created based on the trace result of FIG. 17, the following code is obtained.

G00 Q1 coordinate value (positioning) G01 Q2 coordinate value (corresponding to route L1) G03 Q3 coordinate value, circle X radius value (corresponding to route L2) G01 Q4 coordinate value (corresponding to route L3) G02 Q5 coordinate value, circle Y radius value (corresponding to route L4) G01 Q6 coordinate value (corresponding to route L5) G01 Q7 coordinate value (corresponding to route L6).

Although the present invention has been described above based on the illustrated embodiment, the present invention is not limited to this embodiment and can be implemented in various modes other than this. For example, in the above-described embodiment, the temporary route is displayed as a broken line and the official route is displayed as a thick line, but the display is not limited to such a display, and a display in which the color is changed or a display in which the brightness is changed is displayed. It does not matter if you take a method such as.

In the above description, the display 20
Although the display magnification of the graphic displayed above is not mentioned at all, it is preferable to add a function of performing enlarged display or reduced display at a desired magnification. In particular, if the graphic data in the graphic data storage means 10 is prepared as vector data, enlargement / reduction display can be easily performed. For example, when using a two-button mouse,
It is possible to use the button for inputting the designated point and the second button for enlarging / reducing the display (for example, clicking the button alone causes enlarging display, and clicking with the shift key on the keyboard causes contracting display). . Such an enlarging / reducing function contributes to streamlining the work of accurately designating a desired object. In addition, it is preferable to provide a function of canceling registration of a relay point or route that has already been registered. For example, by providing a display field "CANCEL" on the display screen and designating this display field with the mouse, the registration of the last registered relay point or route may be canceled. Further, in the above embodiment, the control code to be given to the NC machine tool is collectively created after the trace work is completed, but a corresponding control code is created each time one route is registered during the trace work. You may do it.

[0040]

As described above, according to the present invention, the trace work is performed on the display screen based on the graphic data created by CAD or the like, and the control code for the NC machine tool is created based on the result. Therefore, the control code to be given to the NC machine tool can be easily created.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of a control device for an NC machine tool according to the present invention.

FIG. 2 is a diagram showing the first half of a flowchart for explaining the operation of the apparatus shown in FIG.

FIG. 3 is a diagram showing the latter half of the flowchart for explaining the operation of the apparatus shown in FIG.

FIG. 4 is a diagram showing a desired work path L.

5 is a diagram showing an example in which a figure including the work path L shown in FIG. 4 is created by circles and line segments.

FIG. 6 is a diagram illustrating the principle of neighborhood search in step S7 in the flowchart shown in FIG.

FIG. 7 is a diagram showing work for designating a first relay point and a second relay point.

FIG. 8 is a diagram showing a state in which a temporary route K1 indicated by a broken line is displayed between the first relay point Q1 and the second relay point Q2.

FIG. 9 is a diagram showing a work for designating a third relay point.

FIG. 10 is a diagram showing a state in which a temporary route K2 indicated by a broken line is displayed between the second relay point Q2 and the third relay point Q3.

FIG. 11 is a diagram showing a state in which a tentative route K1 between a first relay point Q1 and a second relay point Q2 is registered as a formal straight route L1.

FIG. 12 is a diagram showing a state in which a formal route L2 having an arc is registered between a second relay point Q2 and a third relay point Q3.

FIG. 13 is a diagram showing a state in which a temporary route K3 indicated by a broken line is displayed between a third relay point Q3 and a fourth relay point Q4.

FIG. 14 is a formal route L3 formed by a straight line registered between a third relay point Q3 and a fourth relay point Q4, and an arc formed between the fourth relay point Q4 and the fifth relay point Q5. FIG. 6 is a diagram showing a state in which a formal route L4 according to is registered.

FIG. 15 is a diagram showing a state in which a temporary route K5 indicated by a broken line is displayed between a fifth relay point Q5 and a sixth relay point Q6.

FIG. 16 is a formal route L5 formed by a straight line registered between a fifth relay point Q5 and a sixth relay point Q6, and a broken line between the sixth relay point Q6 and the seventh relay point Q7. Temporary route by
It is a figure showing the state where 6 was displayed.

FIG. 17 is a diagram showing a state in which registration of all relay points and routes has been completed.

[Explanation of symbols]

 10 ... Graphic data storage means 20 ... Display means (display) 30 ... Work path recognition means 40 ... Input means (mouse) 50 ... Code creation means 100 ... NC machine tool control device 200 ... CAD device 300 ... NC machine tool

Claims (3)

[Claims] 1. A graphic data storage means for storing graphic data representing a graphic including a predetermined work path to be machined by an NC machine tool by a combination of line segments and circles, and a graphic based on the graphic data is displayed. Display means for doing, coordinate input means for inputting the position coordinates on the display screen by the display means, based on the position coordinates input by the coordinate input means, of the line segment and the circle in the figure A work path recognition means for recognizing a work path formed by a part; and a code creation means for creating a control code to be given to the NC machine tool based on the work path recognized by the work path recognition means. An NC machine tool control device characterized by the above. 2. A method for creating a code for controlling an NC machine tool by using a computer, wherein a figure including a predetermined machining path to be machined by the NC machine tool is divided into line segments and circles. A first preparation step of preparing graphic data expressed by a combination, a second preparation step of calculating an intersection position of the graphics based on the graphic data, and a graphic based on the graphic data on a display screen. After performing the three preparatory steps of displaying, a first trace step of inputting a designated point designated by an operator on the display screen, and an intersection point existing in the vicinity of the designated point, A second tracing step of extracting the end points and arcs of the line segment, and if intersections or end points are extracted in the second tracing step, these points are newly added. If a circular arc is registered as a relay point and an arc is extracted, the third trace stage for registering this circular arc as a new route and three trace stages of are repeatedly executed to register the relay point and route. Do the following for the route between the relay points where the arc is registered, and for the route between the relay points where it is not registered:
A control method for an NC machine tool, characterized in that a code for controlling the NC machine tool is created by recognizing each as a work path connecting between relay points. 3. The control method according to claim 2, wherein, in the second tracing step, a circle having a preset radius as a center and having a preset radius is defined as a search area, and exists in the search area. Intersections, end points of line segments, arcs, intersections,
The end points of the line segments and the arcs are selected in order of priority, and when only one target object is selected, this selected target object is extracted, and when a plurality of target objects are selected, A method for controlling an NC machine tool, characterized in that extraction is not performed for any object.