JPH0962326A - Nc machining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an NC machining device which can effectively perform the NC machining with high quality and high accuracy by reducing the error verifying load of an NC machining program or automating the verification of error. SOLUTION: The image data on a tool locus 4 are generated from an NC machining program and then compared with the image data on a finished shape 3 of a work which are previously inputted. Then a part where a tool exceeds the prescribed threshold and enters the shape 3 is defined as an overcut part, a part where the tool passes along the surface of the shape 3 within a distance range smaller than the prescribed threshold is defined as a normal cut part, and a lost part of the locus 4 passing along the shape 3 is defined as an uncut part respectively. These defined parts are displayed with emphasis.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an NC machining apparatus for automatically verifying the suitability of an NC machining program. In addition, NC in which a defective part was found by the automatic verification
The present invention relates to an NC machining device that can easily confirm a defective portion with respect to a machining program and supports correction of the NC machining program.

[0002]

2. Description of the Related Art In machining with an NC machining apparatus, it is necessary to prepare in advance an NC machining program in which operation instructions of the apparatus and tools are described.

Prior to actually operating the tool, these NC machining programs have errors in their operation commands such as interference between the tool and the work or a jig for holding the work, excessive cutting by the tool, or uncut. It is necessary to thoroughly check if there is any and verify it in advance.

As one of the NC machining devices for performing this verification, a simulation is performed by the processing system of the NC machining device based on the created NC machining program, and a deficiency point is found in advance by a grammar check and a tool locus image display. Conventionally, there has been an NC machining apparatus having an automatic verification function of an NC machining program for making corrections.

There are various NC machining devices having this automatic verification function, but as described in JP-A-1-296310, a tool locus is generated from an NC machining program, an image is displayed, A general method is to confirm by graphic processing whether or not a desired machining operation is instructed.

In these conventional NC machining apparatuses, the material shape and finish shape of the workpiece to be machined, the shape of the jig to be used, etc. are input as CAD figure data to the apparatus in advance in order to verify the tool path. The image of the tool path generated by reading the tool movement command of the NC machining program is superimposed on the image of
A method was adopted in which the operator visually checked overcuts and uncut areas.

In addition, NC which displays the operation of the tool over time
There was also a processing device. The purpose of these NC processing devices is to display a more realistic cutting operation by displaying cutting over time and to improve the recognition rate of finding a defective portion.

[0008] Specifically, the NC machining apparatus displays the movement of the tool during machining step by step, and displays the situation where the two-dimensionally displayed material shape is scraped off by the tool. .

The work is three-dimensional (solid).
In some cases, the shape of the work being cut by a tool is displayed as an image for each step.

Further, conventionally, there has been an NC machining apparatus for simultaneously displaying on the screen the image data displaying the work or tool path and the source text data of the NC machining program, or switching the display. The reason for displaying the image data and the NC processing program in parallel in this way is to verify the NC processing program and handle the graphic display mode and the text display mode in parallel.

In these NC processing apparatuses, the screen display is switched by a menu method, or the text screen is simultaneously displayed on the graphic display screen by a window.

Further, conventionally, there has been an NC machining apparatus which automatically displays the correspondence between the image display of the tool and the NC machining program.

This NC machining device simultaneously displays image data such as NC tool locus and source text of the NC machining program on the screen, and designates a graphic element of the NC tool locus with a mouse or the like to determine which of the source text is displayed. It was to display whether or not to hit the part. This conventional NC
In the processing apparatus, one graphic element of the tool path is associated with one line of the source text.

[0014]

However, the above N
As described above, in the conventional NC machining apparatus having the check function of the C machining program, the work shape and the tool locus are superimposed and displayed as an image for visual check, but the interference is allowed. No information was given about the relationship with the value. Therefore, the operator's visual inspection and experience were used exclusively to determine whether the portion was over-cut or was left uncut.

As a function of assisting in finding the above-mentioned over-cut portion and uncut portion (collectively referred to as machining defective portion), the portion in which the tool path cuts into the finished shape of the work is displayed in red on the screen. There have been some that have a function to make it easier to find a machining defect, but the final judgment regarding the allowable value still relied on the operator's visual inspection.

The above visual check by the operator was effective for finding a large operation command error, but it was complicated to check the tool locus for complicated contour machining. Further, in order to determine the fine tool path, it is necessary to frequently perform the movement of the display unit and the enlargement process, which requires a lot of time, the accuracy of the check, the quality after the check,
There was a problem in efficiency.

Further, in the case of correcting the source text of the NC processing program for the processing defect portion visually found from the image display, the conventional NC processing apparatus requires complicated operations.

In particular, in an NC machining apparatus that does not have a function of displaying the correspondence between the image of the NC tool path or the like and the source text of the NC machining program, the operator searches which part of the text corresponds to the correction target portion on the image. It was very difficult to do. This was even more so when the size of the NC machining program was large or when there were many correction points.

Further, in the conventional NC machining apparatus having a function of displaying the correspondence between the image of the NC tool trajectory and the source text of the NC machining program, one graphic element of the tool trajectory and one line of the source text are also included. Since it had only a function as a pointer for associating, it is not possible to display a block of source text corresponding to a continuous image part composed of a plurality of graphic elements or a source text part corresponding to a correction part on a plurality of images. could not. This means
In the actual work of modifying the NC machining program, it was a heavy burden on the operator.

Further, in addition to the correspondence between the image display of the tool path and the NC machining program as described above, the text data of the NC program can be changed by operating the graphic data such as the work shape and the tool path displayed in the image. There has been a long-felt need to develop a function that is automatically modified.

Regarding the display of the cutting process over time, the conventional NC machining apparatus which displays the process in which the material displayed in two dimensions is cut by the tool is color-displayed by displaying the material as a surface on the screen. Every time, the tool was simply erasing the swept area, so it lacked a sense of reality.

For example, an NC machining apparatus for performing turning (machining in which a tool moves two-dimensionally) can display only a cross-section display (only a cross-sectional view of a cutting plane), and simultaneously displays an outline drawing and an inner diameter step. I couldn't do that.

On the other hand, the NC processing apparatus capable of processing a three-dimensional solid work is difficult to process except for an expensive system using a high-performance processing system (workstation).

When performing a cutting process having a plurality of cutting steps, particularly when performing a plurality of times of cutting processes from roughing to finishing, it is preferable to gradually machine a workpiece with a plurality of tool loci. Generally, in the conventional NC machining device, NC of each of these tool paths is
I was checking if the machining program was specified correctly. Such a one-to-one check of the tool path requires a lot of processing time. The same applies to the case of performing contour processing with an end mill or the like that requires consideration of the tool diameter and the nose R correction value. On the other hand, it is expected that the method of generating the envelope of the trajectory of the tool up to a predetermined cutting process and checking if it interferes with the finished shape of the work etc. is highly efficient. Was waiting.

Therefore, the problem to be solved by the present invention is to reduce the load of error verification of the NC machining program or to automate the verification, so that NC machining of high quality and accuracy can be performed efficiently. To provide a processing device.

[0026]

In order to solve the above problems, an NC machining apparatus according to claim 1 of the present application generates image data of a tool locus from an NC machining program and inputs the image data of the tool locus in advance. Compared with the image data of the finished shape of the workpiece, the part where the tool exceeds the predetermined threshold and enters the finished shape of the work is overcut, the tool is within the distance range smaller than the predetermined threshold. It is judged that the part that passes along the surface of the finished shape of normal cutting is the normal cutting part and the part of the tool path that passes along the finished shape of the workpiece is the uncut part, and the overcut part and the uncut part are It is characterized by highlighting.

The NC machining apparatus according to claim 2 of the present application is the NC machining apparatus according to claim 1, which corresponds to the case where the overcut portion or the uncut portion is detected.
It is characterized in that the portion on the source text of the C processing program is highlighted including the coloring.

An NC machining apparatus according to claim 3 of the present invention generates image data of a tool locus of each cutting process from an NC machining program that performs a plurality of cutting processes, and calculates the envelope of the tool locus up to the designated cutting process. Image data is generated, and the image data of this envelope is compared with the image data of the tool trajectory in the next process or the image data of the finished shape of the work input in advance, and the tool of the envelope exceeds the specified threshold value. The tool path of the next process or the part that goes into the finished shape of the work is cut too much, and the tool with the envelope curve passes along the tool path of the next process or the finished shape of the work within a distance range smaller than the specified threshold value. The part to be cut is the normal cutting part, and the missing part of the tool path of the next process or the tool path passing along the finished shape of the workpiece is the uncut part. And it is characterized in that to highlight uncut portion and the cut too moiety.

An NC machining apparatus according to claim 4 of the present application is an NC machining apparatus that performs cutting with a plurality of tools.
Appropriate cutting conditions for each tool to be used are stored in advance in the database, the type of tool to be used is determined from the NC machining program, and the cutting conditions for the tool specified in the NC machining program are searched for. The cutting conditions of the tool are compared with the proper cutting conditions of the corresponding tool in the database, and the program part that commands heavy cutting that causes excessive load and light cutting that causes insufficient load is determined, and these parts are determined. Is highlighted.

The NC machining apparatus according to claim 5 of the present application is, in the NC machining apparatus for performing turning, generates an outline drawing and a sectional view of the workpiece from the inputted image data relating to the shape of the workpiece, and the tool cuts the workpiece. It is characterized by displaying the progressing process with time.

An NC machining apparatus according to claim 6 of the present application automatically displays coordinate values relating to designated coordinate axes near the end points or fulcrums of each graphic element of the tool path or the shape of the work displayed on the screen. It is characterized by that.

In the NC machining apparatus according to claim 7 of the present application, the coordinate increment value of the end point with respect to the start point of each graphic element of the tool path displayed on the screen is used as a value that defines the position of the end point, and the vicinity of the end point is defined. It is characterized by being automatically displayed on.

The NC machining apparatus according to claim 8 of the present application is NC
The tool change command of the machining program is searched and judged, and the NC machining program is divided into blocks for each type of tool used,
It is characterized in that page display and index management are performed for each block of the NC processing program.

The NC machining apparatus according to claim 9 of the present application automatically extends or trims a related graphic element by correcting a predetermined graphic element of the tool path in the image display mode, and supports it. It is characterized in that the portion of the NC processing program to be executed is automatically corrected so as to match the change of the image.

In the NC machining apparatus according to claim 10 of the present application, the operation of the apparatus according to the auxiliary operation command is made to correspond to a predetermined display method in advance, and the operation status is displayed by the display method corresponding to the auxiliary operation command. To do.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an NC processing apparatus for performing lathe processing will be described below as an embodiment of the present invention with reference to the drawings. FIG. 1 shows a display screen of an NC processing apparatus according to the present invention. On the display screen 1 of the NC processing apparatus, the workpiece material shape 2, the finished shape 3, and the tool path 4 are displayed simultaneously. A source text 5 of the NC machining program is also displayed in a window on a part of the display screen 1.

In this NC processing device, when an automatic check of the tool locus is instructed, the processing device of the NC processing device
By checking the graphic data of the finished shape 3 of the work and the coordinates of the graphic elements such as the line segments and arcs that make up the tool path 4, the overcut portion of the work, the normal cut portion, and the uncut portion are checked. Automatically detected.

In checking the overcut portion, the graphic element of the tool locus 4 which intersects with the finished shape 3 of the work and whose end point enters inside the finished shape 3 of the work is extracted.

In the graphic element of the tool path 4 extracted at this time, the coordinates of the end points exceed the preset minute value ε1 from the graphic data indicating the finished shape 3 of the work and the inside of the finished shape 3 of the work is exceeded. Only things that get in.

In this way, the minute value ε1 is specified when the cutting edge of the tool is intentionally moved inward from the finished surface of the designed work within the finished dimension tolerance, or when the tool locus is defined as the finished shape of the work. NC when it is very close to the figure element and the cutting edge of the tool enters inside the finished surface of the work piece due to numerical processing error of the computer.
This is to prevent it from being determined as a command mistake in the machining program.

The normal cut portion and the uncut portion are checked by simultaneous processing. First, all the tool paths in which the fulcrum of the graphic element of the tool path 4 (the center point for a line segment, the center coordinate for an arc, etc.) are approaching the graphic data indicating the finished shape 3 of the workpiece are extracted. To do. It is determined whether or not these extracted tool paths form a continuous line (closed line), and the graphic element in the discontinuous portion is detected. The detection of this discontinuous graphic element does not intersect with the graphic element of another tool path 4 in the extracted graphic element group of the tool path 4 and only one end point is in contact with another graphic element. This is done by detecting existing graphic elements. Since this discontinuous graphic element is a tool path that is machining the vicinity of the uncut portion, as shown in FIG. 3, the graphic element of the tool locus 4 is indicated by a thick line, and the adjacent cut portion is cut. Display that there is a remaining part.

As for the graphic element of the tool locus 4 which is extracted as being close to the finished shape 3 of the work, the fulcrum coordinates and the graphic data indicating the finished shape 3 of the work are equal to or less than the preset minute value ε2. Only things.
The graphic elements of the tool path 4 in the vicinity of the finished shape 3 of the work excluding the overcut portion and the uncut portion are normal cutting portions.

In the above embodiment, only the check of the interference relation between the tool and the work is explained, but the NC machining apparatus also checks the interference relation between the tool and the jig for holding the work. It can be carried out. In this case, the outer shapes of the jig and the tool may be input in advance, and the portion where the tool and the jig interfere with each other may be detected as the defective portion.

As a result, it becomes possible to automatically determine the error check of the tool movement command, which conventionally had to rely on the visual determination by the image display of the tool trajectory and the work figure data, and the visual check can be automated. it can.

Next, according to the NC machining apparatus, after the defective portion of the machining is determined, the portion corresponding to the defective machining portion is automatically displayed in the source text 5 of the NC machining program. You can When a command is issued to display the defective portion of the NC machining program, the portion is displayed in red as shown in FIG. This is realized by associating with a pointer which line of the source text 5 of the NC machining program the tool path of the machining defect portion corresponds to, and displaying it in red when it is displayed on the screen.

At this time, if the machining defect occurs in the tool locus portion consisting of a plurality of graphic elements, the relevant portion (block) of the text data of the NC machining program is automatically identified by a colored display or the like and marked. To do so.

Further, even if it is not the correction target portion, by picking and selecting with the mouse or the like in the graphic display area, the corresponding portion of the text data of the NC machining program that has generated a plurality of designated and selected tool locus graphic elements ( (Line) can be automatically marked by colored display, or conversely, on the NC program source text display screen, the tool path corresponding to the line selected by picking with the mouse etc. can be displayed in different colors on the screen display. To This makes it possible to improve the interlocking property by associating the display screen of the tool path and the display screen of the NC program source text with each other, and to improve the operability.

Next, a check method different from the above-described check of the processing defect portion will be described below. The above-mentioned check for defective machining was detection of defective machining with one tool, but normal machining involves exchanging multiple tools and performing multiple cutting processes from roughing to finishing. To do. It is inevitable that a lot of time will be taken if the machining defects are individually checked for these plural cutting processes and finally compared with the finished shape of the work.

On the other hand, according to this NC machining apparatus, the envelope of the tool locus can be automatically checked. When the automatic check of the envelope of the tool locus is instructed, the NC machining device considers the diameter value of the tool and the nose R correction value, and considers many shapes such as line segments and arcs that form the loci of a plurality of tools. Of the elements, the graphic elements forming the envelope of all tool trajectories are extracted, and the sweep area 6 of the tool is graphicly recognized as shown in FIG. The line forming the contour of the sweep region 6 of the tool becomes the envelope 7 of the tool trajectory. This envelope 7
Can be used to measure the dimensions and to compare with the finished shape of the work.

In the automatic check of the envelope of the tool locus, as with the case of checking one tool locus described above with respect to the line segments and arcs forming the envelope 7, an excessively cut portion of the finished shape 3 of the workpiece, normal Check the cut and uncut areas.

As a result, it is possible to greatly reduce the time required to check the tool locus of cutting work having a plurality of cutting steps, and it is possible to easily visually confirm the defective portion.

Further, according to the NC processing apparatus, the defective processing portion of each cutting process can be examined by the envelope. That is, the NC machining apparatus stores the tool locus of each cutting process and can determine the envelope of the tool locus up to a predetermined cutting process. By comparing and examining the envelope of the tool locus up to the predetermined cutting step and the envelope of the tool locus up to the cutting step of the next step, it is possible to check the machining defect portion of each cutting step.

For example, in FIG. 6, reference numeral 8 indicates the envelope of the tool locus in the roughing process, and reference numeral 9 indicates the envelope of the tool locus in the finishing process, which is based on the tool locus envelope 9 in the finishing process. By checking the tool locus envelope 8 in the roughing process as a line, it is possible to detect the overcut portion, the normal cutting portion, the uncut portion, and the like as described above. The check of the envelopes of the tool loci can be performed after the machining process.

By the automatic check based on the above envelope, the time and labor required for verifying the tool loci in each cutting process in the past are greatly reduced, and the tool locus verification can be facilitated.

Next, the function of automatically correcting the NC machining program by this NC machining apparatus will be described below. Book N
According to the C processing apparatus, by operating the image displaying the graphic such as the tool trajectory, the NC corresponding to the operated portion is displayed.
The part of the machining program is automatically modified. That is,
It is possible to perform simultaneous processing in parallel without switching the image display mode and the text display mode.

Specifically, as shown in FIG. 7, a graphic element 10 of a tool locus to be corrected is picked by a mouse or the like by the same operation as the CAD operation, and a new end point coordinate 1
By re-designating 1a and 11b (diameter of arc, etc. in some cases), a graphic element 11 of a new tool path is generated. At this time, as the graphic element 10 moves, it becomes a crossing or discontinuous relationship with the surrounding graphic elements, but the processing system of this apparatus extends / trims the related graphic elements by a known graphic processing method. . At the same time, according to the processing system of the present apparatus, the source text portions 12 and 13 corresponding to the operated graphic element are searched, and the coordinate values thereof are extended or trimmed to automatically correct necessary portions.

As a result, the operator can set the optimum tool locus by devoting himself to the graphic correction of the tool locus without switching the image / text display mode.

Regarding the screen display of the tool locus and the like, the NC processing apparatus of the present invention can display it by a method that facilitates error determination by visual check. For example, as shown in FIG. 8, it is possible to add a function of automatically displaying end point coordinate values of a graphic element near the graphic element for each X and Z coordinate. Further, as shown in FIG. 9, it is possible to add a function of displaying the coordinate increment value from the start point to the end point at one time.

As shown in FIG. 8, when automatically checking the NC machining program, the machining command positions of one coordinate axis are checked first, and then the machining command positions of the next coordinate axes are checked. This is because the method of doing so is generally adopted and it is also efficient.

For example, when the command coordinate value of the turning program is directly determined by the value, all the X coordinate values of the tool locus (command value in the diameter direction of the work) are first checked,
After that, a method of confirming the Z coordinate value (command value in the length direction of the work) is generally used. On the other hand, in this NC processing device, since only the X coordinate values (or only the Z coordinate values) of all the graphic elements displayed on the screen are displayed at once near the elements, The efficiency of visual confirmation can be improved.

Further, as shown in FIG. 9, the coordinate increment value from the start point to the end point is displayed, and in many cases it is desired to confirm the end point coordinate value of the graphic element of the tool locus to be checked by the increment value from the start point. Because. This is because the dimensions (values such as width and length) of each part of the shape element of the design drawing are not always written in absolute coordinates with reference to the origin, but in relative values. This is because.

Therefore, for example, when the command coordinate value of the turning program is directly determined by the value, the coordinate value of the end point of the graphic element of the tool locus is displayed by the increment value from the start point, and the coordinate value is displayed. The efficiency of the target confirmation can be improved.

Next, a realistic display of the cutting status by the NC processing apparatus will be described below. The NC processing apparatus can simultaneously display the cut surface and the outer shape of the work as shown in FIG. To display the cut surface of the work, extract the graphic elements in which the graphic elements are in contact with each other at an angle from the input values of the graphic data such as the material shape and the finished shape of the work, and extend this to the center axis to draw the outline. indicate. However, when extending this graphic element, if the extension line is inside another graphic or if the extension line intersects with another graphic element, the line segment beyond that is not displayed. By this processing, a cross-sectional view of the work as shown in the upper part of the finished shape 3 in FIG. 1 can be displayed.

Further, when displaying an outline drawing of a work as displayed at the bottom of the finished shape 3 in FIG. 1, among the graphic elements, a graphic in which other graphic elements do not exist from the central axis toward the outside. This can be realized by extracting the element, displaying the end point of the graphic element that is connected to another graphic element at an angle by extending it to the central axis.

As a result, it becomes possible to simulate the situation close to the actual machining on the system. In the case of the turning system (two-dimensional machining), the cross-sectional shape showing the stepped shape of the inner diameter and the outline drawing. And can be displayed at the same time. That is, it is possible to realize the same display as the notation method of the design drawing of the turning work.

Furthermore, in addition to the image display of the above work,
The situation in which the tool scrapes this can be displayed in an overlapping manner. As a result, the operator can easily check the shape of the work with the design drawing by displaying a realistic image.

Further, in the image display mode of the NC machining apparatus, auxiliary operation commands (M code, T code, etc.) other than the tool operation command (G code command), for example, ON / OFF command for cutting water discharge, tool exchange. Etc. can be visually displayed.

For example, when a cutting water discharge ON / OFF command (usually M09 / M08) is issued, the background color of the screen display is changed to blue / black, or a spindle rotation ON / OFF command ( Usually, when the M05 / M04) is issued, the pattern of the tool displayed on the screen is displayed to rotate, or a tool change command (usually TXXM06)
When the is issued, the operation of the ATC is simulated and displayed. This makes it possible to visually confirm the operation of the device other than the operation of the tool.

Next, the function of the present NC machining apparatus for automatically dividing the NC machining program block for each tool change into pages and displaying the same will be described below. FIG.
Shows an example of a screen in which the NC machining program is divided into pages and displayed for each tool. Since the tool change is usually instructed by the T code, this NC processing device
The T code in the machining program is searched, and one T code to the next T code are divided into pages, which are displayed as a display screen 20 shown in FIG. 10 to enable index management.

In this way, the pages are displayed for each tool. In the check work of the NC machining program, the block for which machining with one tool is instructed is set as one unit and the check is performed separately. Because there are many.

As a result, when a large number of tools are used or a large NC program is verified,
The operability such as the transition between the image display mode and the text data display mode is improved, and the NC machining program can be efficiently verified.

Next, the automatic determination of heavy / light cutting by this NC processing apparatus will be described below.

For automatic determination of heavy / light cutting, refer to FIG.
The proper cutting feed conditions for each tool as shown in (4) are stored in advance in the master database in the processing system of the apparatus. Next, when reading the NC program source text to generate the tool path, the processing condition value is read from the source text, and the specified location of the feed that differs by 50% or more from the proper feed registered in advance for the tool is overlapped. / It is automatically judged as light cutting and the relevant feed designation (F
The designated character is displayed in color as shown in the lower part of FIG.

As a result, not only the trajectory of each tool, but also the cutting can be performed by each tool under proper processing conditions, the tool is prevented from being worn and damaged, and the cutting is efficiently performed. it can.

[0075]

As is apparent from the above description, the NC machining apparatus according to the present invention can automatically determine and detect the defective portion of the NC machining program. In addition, since the portion to be corrected of the NC machining program source text is automatically searched from the defective portion of the tool path and displayed to the operator, the NC machining program check,
It is possible to provide an NC processing apparatus having good operability such as correction.

Further, according to the NC machining apparatus of the present invention, the tool trajectories of a plurality of cutting processes can be displayed as envelopes, whereby the relationship between a specific cutting process and the next cutting process, or a specific cutting process. And the finished shape of the work can be easily verified.

Further, according to the NC machining apparatus of the present invention, the proper machining conditions of the tool and the machining conditions on the NC machining program can be automatically collated, whereby the inappropriate machining condition portion can be detected, and the high quality and high quality can be detected. Efficient cutting can be performed.

Further, according to the NC processing apparatus of the present invention, the cut surface showing the shape of the hollow portion and the outline drawing can be displayed at the same time, which facilitates the collation with the design drawing. Further, the cutting locus of the tool can be displayed on the cutting surface and the outline drawing, which makes it possible to realize a realistic display of the cutting process.

Further, the NC machining apparatus according to the present invention displays the coordinate value on a predetermined coordinate axis or the increment of the end point with respect to the start point of the graphic element in the vicinity of the end point of the graphic element, thereby performing a normal NC machining program verification method. Enables verification suitable for.

Further, according to the NC machining apparatus of the present invention, the NC machining program is automatically divided into pages and displayed / managed depending on the tools used. This facilitates verification for each tool and improves the efficiency of verification of an NC machining program that uses a large number of tools.

Further, the NC machining apparatus according to the present invention automatically adjusts the source text of the NC machining program by modifying the tool path in the image display mode. As a result, the operator can concentrate on the correction of the tool path, is free from the complicated display mode switching, and can efficiently perform N
The C machining program can be modified.

Finally, the NC machining apparatus according to the present invention can visualize the operation of the apparatus without the movement of the tool, that is, the auxiliary operation command of the apparatus. As a result, the operator can grasp the operating state of the apparatus, maintain the NC processing apparatus in a state suitable for cutting, and perform appropriate cutting.

[Brief description of drawings]

FIG. 1 is a diagram showing a screen display example of an NC processing device.

FIG. 2 is a diagram exemplifying an excessively cut portion of a tool path.

FIG. 3 is a diagram illustrating an uncut portion of a tool path.

FIG. 4 is a diagram exemplifying highlighting of a corrected portion of an NC machining program corresponding to an image display mode.

FIG. 5 is a view exemplifying an envelope of a tool path.

FIG. 6 is a diagram exemplifying a screen for checking the interference between the envelopes of the tool path.

FIG. 7 is a diagram illustrating automatic correction of an NC machining program accompanied by image correction of a tool path.

FIG. 8 is a diagram showing a screen displaying X coordinate values of end points of graphic elements of a tool path.

FIG. 9 is a diagram showing a screen in which an increment value from a start point of a graphic element of a tool path is displayed near an end point.

FIG. 10 is a diagram exemplifying a screen in which a source text list for each tool used is automatically paginated.

FIG. 11 is a diagram illustrating automatic determination of heavy / light cutting.

[Explanation of symbols]

 1 Display screen by NC machining device 2 Work material shape 3 Finished shape 4 Tool trajectory 5 Source text 6 Tool sweep area 7 Tool trajectory envelope 8 Tool trajectory envelope in rough machining process 9 Tool trajectory in finishing process Envelope 10 Graphical element of tool path to be corrected 11 Graphical element of new tool path 11a End point coordinates 11b End point coordinates 12 Corresponding source text location 13 Corresponding source text location

Claims (10)

[Claims] 1. An image data of a tool path is generated from an NC machining program, and the image data of the tool path is compared with image data of a finish shape of a work input in advance, and the tool exceeds a predetermined threshold value. A part that goes into the finished shape of the work is cut too much, a part where the tool passes along the surface of the finished shape of the work within a distance range smaller than a predetermined threshold value is normally cut, and along the finished shape of the work An NC machining apparatus characterized in that a defective portion of a tool path passing through is determined as an uncut portion, and the overcut portion and the uncut portion are highlighted. 2. When the overcut portion or the uncut portion is detected, the portion on the source text of the corresponding NC machining program is highlighted with a color. NC processing equipment. 3. An NC machining program for performing a plurality of cutting processes, image data of a tool locus of each cutting process is generated, image data of an envelope of a tool locus up to a designated cutting process is generated, and this envelope curve is generated. Image data and the image data of the tool locus of the next process or the image data of the finished shape of the work input in advance are compared, and the tool of the envelope exceeds the predetermined threshold value and the tool locus of the next process or the work The part that goes into the finished shape is cut too much, the part of the envelope that passes along the tool path of the next process or the finished shape of the workpiece within the distance range smaller than the predetermined threshold is the normal cutting part, the next process Of the tool path or the tool path that passes along the finished shape of the workpiece is determined as the uncut portion, and the overcut portion and the uncut portion are determined. NC machining apparatus characterized by highlighting portions. 4. In an NC machining device that performs machining with a plurality of tools, appropriate cutting conditions for each tool to be used are stored in advance in a database, and the type of tool to be used is determined from the NC machining program, The cutting conditions of the tool specified in the NC machining program are searched, the cutting conditions of this tool are compared with the proper cutting conditions of the corresponding tool in the database, and heavy cutting that causes excessive load and insufficient cutting The NC which is characterized by distinguishing the program part instructing the light cutting which is a load and highlighting these parts.
Processing equipment. 5. An NC machining apparatus for performing a turning process generates an outline drawing and a cross-sectional view of a work from the input image data relating to the shape of the work, and displays the process in which the tool cuts the work over time. An NC processing device characterized in that 6. The vicinity of the end point or fulcrum of each graphic element of the tool path or work shape displayed on the screen,
An NC processing device characterized by automatically displaying coordinate values relating to designated coordinate axes. 7. The coordinate increment value of the end point with respect to the start point of each graphic element of the tool path displayed on the screen is automatically displayed near the end point as a value defining the position of the end point. NC processing equipment. 8. A tool exchange command of an NC machining program is searched and judged, the NC machining program is divided into blocks for each type of tool used, and page display and index management are performed for each block of the NC machining program. Characteristic NC processing device. 9. A predetermined graphic element of a tool path is corrected in an image display mode to automatically extend or trim a related graphic element, and a corresponding NC machining program portion is displayed as an image. An NC processing device that is automatically corrected to match changes. 10. An NC processing apparatus, wherein the operation of the device according to an auxiliary operation command is made to correspond to a predetermined display method in advance, and the operation status is displayed by a display method corresponding to the auxiliary operation command.