JPH10113836A - Cutting tool checking method and device used for nc machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To completely ensure the identity of cutting tools and surely extract tool attribute information from NC machining program at a high speed. SOLUTION: In a machine tool with automatic tool changer, tool attribute information including the kind of the tool, tool diameter, tool length, tool diameter compensation number and tool length compensation number is prepared in the NC program beforehand. The tool number and tool attribute information of each of the cutting tools contained in a tool magazine 2 are stored as a tool information table 141 in the tool magazine, and a tool number and tool attribute information are extracted from the NC program and stored as a tool information table 142 in the program, and the tool information table 141 in the magazine and the tool information table in the program are compared. Then, cutting tools with the tool number, whose tool attribute information is inharmonious with corresponding tool attribute information in the tool information table 142 in the program are searched, displaying the tool number of cutting tool whose tool attribute information is inharmonious with corresponding tool attribute information in the tool information table 142 in distinction from other tools.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an NC machine tool having an automatic tool changer, which compares a machining tool stored in a tool magazine with a machining tool used in an NC machining program for machining. The present invention relates to a used tool check method and a device for checking a missing tool or a tool to be changed.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. Hei 4-223835 discloses N
Tool tool data consisting of a tool number and a tool attribute is incorporated in the C machining program in the form of a comment, tool data used in the NC machining program is extracted, and the tool data is used as magazine tool data representing a tool in the tool magazine. A method of changing and registering a tool number of a tool magazine is described in comparison with the method of the first embodiment. As described above, the used tool data is incorporated in the NC machining program, and the used tool is checked by comparing it with the tool magazine data.

[0003]

The tool data used in the conventional NC machining program does not include information on tool diameter correction and information on tool length correction, and is insufficient as tool attribute information. If the tool identity and the tool length compensation data are ignored and the tool identity is determined, tools with different compensation data will be used as the same tool.
The machining shape and the machining dimensional accuracy may be deteriorated, and a collision between the tool and the workpiece may occur.

[0004] Further, when the tool data to be used is incorporated in the NC machining program in the comment format, there is no identifier indicating that the tool data is the tool data to be used, or it is not clear in what format the comment format is to be incorporated. It was not possible to easily determine whether the data was a comment or used tool data, and it took time, and high-speed processing could not be expected. Further, there is a possibility that a normal comment is erroneously determined to be used tool data, or that a used tool data is erroneously determined to be a normal comment.

Accordingly, the present invention provides an NC machine tool having an automatic tool changer, which can completely guarantee the sameness of the tools without deteriorating the machining accuracy, and furthermore, does not reduce the tool attribute information from the NC machining program. An object of the present invention is to provide a method and an apparatus for checking a used tool of an NC machine tool which can perform extraction at high speed and reliably.

[0006]

In order to achieve the above object, a method for checking a tool to be used on an NC machine tool according to the present invention comprises:
In the tool checking method of an NC machine tool having an automatic tool changer, the NC machining program includes tool attribute information including a tool type, a tool diameter, a tool length, a tool diameter correction number, and a tool length correction number of a processing tool in advance. Insert it,
Tool attribute information including the tool type, tool diameter, tool length, tool diameter correction number and tool length correction number of the processing tool stored in the tool magazine is stored as a tool information table in the magazine in association with the tool number, and A tool number and tool attribute information corresponding to the tool number are extracted from the NC machining program and stored as a tool information table in the program.
The tool information table in the magazine is compared with the tool information table in the program to search for a machining tool having a tool number whose tool attribute information does not match. It is characterized in that it is displayed separately from the machining tool.

In the above-described method for checking a tool used by an NC machine tool, it is preferable that the tool attribute information in the NC machining program is inserted as comment information that does not directly indicate the operation of the NC machine tool.

In the above-described method for checking a tool used by an NC machine tool, the tool attribute information in the NC machining program can be distinguished from normal comment information because the first character of the comment information is a specific identifier character. Preferably, it is

In the above-described method for checking a tool used by an NC machine tool, the comment information representing the tool attribute information does not include a tool number, and the tool number corresponding to the closest tool change command after the comment information is provided. Preferably, the tool attribute information is associated with

The method for checking a tool used by an NC machine tool according to the present invention is a method for checking a tool used by an NC machine tool having an automatic tool changer.
A tool attribute information including at least a tool type and a tool diameter of a processing tool, which is surrounded by a control-out function character and a control-in function character, and is prefixed with an identifier character indicating tool attribute information, is inserted in advance. In advance, tool attribute information including at least the tool type and the tool diameter of the processing tools stored in the tool magazine is stored as a tool information table in a magazine in association with the tool number, and the tool number and the corresponding tool are stored from the NC processing program. The tool attribute information corresponding to the tool number is extracted and stored as a tool information table in the program, and the tool information table in the magazine is compared with the tool information table in the program. Search for a tool number for which the tool attribute information does not match. The tool in distinction from the other processing tool and displaying.

In the above-described method for checking a tool used by an NC machine tool, it is preferable that the tool type of the machining tool is inserted into the NC machining program with an abbreviated name including a machining process.

A tool checking device for an NC machine tool according to the present invention is a tool checking device for an NC machine tool having an automatic tool changer, and includes a tool type, a tool diameter of a working tool stored in a tool magazine, A tool information table storage means in a magazine for storing tool attribute information including a tool length, a tool diameter correction number and a tool length correction number as a tool information table in a magazine in association with the tool number, and a tool number and its information from the NC machining program. A tool information extracting means in a program for extracting a tool type, a tool diameter, a tool length, a tool diameter correction number and a tool attribute information including a tool length correction number with respect to a tool number to make a tool information table in the program; An in-program tool information table storing means for storing an information table; and a tool information table in the magazine. And a tool information table in which the tool attribute information does not match. Display control means for displaying the processing tool having a mismatched tool number on the display means so as to be distinguished from other processing tools.

[0013] A tool checking device for an NC machine tool according to the present invention is a tool checking device for an NC machine tool having an automatic tool changer, wherein a tool type and a tool diameter of a working tool stored in a tool magazine are determined. A tool information table storage means in a magazine for storing the tool attribute information including the tool attribute information in association with the tool number as a tool information table in a magazine; and an identifier character indicating that the tool attribute information follows the control out function character in the NC machining program. Tool attribute information identifying means for detecting information up to the subsequent control-in function character as tool attribute information, and a tool including a tool number and a tool type and a tool diameter corresponding to the tool number from the NC machining program. Attribute information based on the identification result of the tool attribute information identification means An in-program tool information extracting means for outputting the in-program tool information table; an in-program tool information table storing means for storing the in-program tool information table; and the in-magazine tool information table and the in-program tool information table. Compared to,
A mismatch search means for searching for a machining tool having a tool number whose tool attribute information does not match, a display means capable of displaying characters and graphics, and a machining tool having a tool number whose tool attribute information does not match another machining tool. Display control means for distinguishing and displaying on the display means.

In the above-described tool checking apparatus for an NC machine tool, it is preferable that the tool type of the working tool is inserted into the NC working program with an abbreviated name including a working process.

[0015]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration centered on an NC (numerical control) device 1 of an NC machine tool to which the present invention is applied. The NC device 1 is provided with a CPU 10 for performing various data processing.
ROM 12, RAM program area 13, RA
The M data area 14 and peripheral devices are connected. C
The PU 10 operates according to the system programs and data stored in the ROM 12 and the programs and data loaded in the RAM program area 13 and the RAM data area 14.

As the peripheral device, display means 15 for displaying characters and figures and input means 16 for an operator to input data are connected to the bus 11 via an interface circuit. As the display means 15, a CRT or a liquid crystal display panel can be used, and as the input means 16, a keyboard or the like can be used. As a peripheral device, a fixed disk device 17 is provided.
Various application programs to be executed by the CPU 10 are loaded into the AM program area 13. There is an input / output device 18 as a peripheral device,
The input / output device 18 includes an input / output device of an external storage medium such as a flexible disk, a paper tape reading device, and the like, reads an NC processing program created in advance, and conversely, flexibly executes an NC processing program in the NC device 1. It can be stored on a disk or the like.

The NC device 1 has an interface circuit,
The drive of the tool magazine 2 is connected via a programmable controller (PC). The tool magazine 2 has a plurality of tool pots 3, and each of the tool pots 3 stores a plurality of types of machining tools required for machining. Further, the tool pot numbers are sequentially assigned to the tool pots 3, and the same tool numbers as the tool pot numbers are assigned to the working tools stored in the tool pots 3.
In response to a command from the NC device 1, the tool magazine 2 is indexed and rotated so that a machining tool having a desired tool number, that is, a tool pot number, comes to a tool changing position.

In the RAM program area 13, programs for data processing such as a setup collation program 131, a tool attribute information identification program 132, a tool information extraction program 133, a mismatch search program 134, and a display control program 135, which will be described later, are stored. It is remembered. R
In the AM data area 14, a tool information table 141 in the magazine in which the tool numbers of the processing tools stored in the tool magazine and the tool attribute information are arranged in correspondence with each other, the tool numbers and the tools of the processing tools in the NC processing program. Tool information table 14 in the program arranged in correspondence with attribute information
2. A memory area for NC machining program data 143 to be executed next is provided. Note that an NC machining program memory storing a plurality of NC machining programs may be provided in this RAM.

FIG. 2 is a diagram showing an example of the NC machining program. The line numbers in the left column are for illustration only,
It is not added to the actual NC machining program. The number following "O" (O) on the first line is the program number,
When the NC processing program is read from a fixed disk device or the like during memory, the NC processing program is designated by the program number. Subsequent "(" is a control-out function character, and ")" is a control-in function character. The portion enclosed by "(" and ")" is a portion that is not used as an NC command, and is usually used as a comment. The second and third lines are NC commands representing the M function, but are not directly related to the present invention, and thus description thereof is omitted.

"N3" on the fifth line is a sequence number. The portion surrounded by "(" and ")" describes information indicating the tool attribute of the working tool to be used. It is not an ordinary comment but tool attribute information, which is distinguished by the character immediately after “(” being “￥.” “で” is an identifier character, that is, “(￥” is tool attribute information. The identifier character is not limited to “@” and may be any other character.

The tool attribute information includes a tool type, a tool diameter correction number, a tool diameter, a tool length correction number, and a tool length.
Each item is separated by a slash character (/) or a space (space) character. The character indicating the delimiter is not limited to “/” or “(space)”, and may be any other character. "R-FMIL
"L" is a tool type, and indicates a face mill for rough machining.
FIG. 5 shows a list of tool type abbreviations, but the abbreviations are not limited to this, and other abbreviations may be given. “TD” represents the tool diameter, the tool diameter correction number is “3”, and the tool diameter is “80.
0 "mm. "TL" represents the tool length,
Tool length correction number is "3", tool length is "120.0" mm
It is shown that.

The tool diameter correction number is a number indicating a memory area for storing an offset value between a program path of the NC machining program and a path through which the tool center actually passes. If the tool diameter correction number is “3”, the tool diameter correction command (G4
1, G42), the machining is performed by moving along a tool path offset to the right or left by a radius from the tool path programmed by the third tool diameter offset value in the offset memory. Tool length refers to the length from the gauge end of the spindle tip to the tool tip when mounted on the spindle,
The tool length correction number is a number indicating a memory area for storing an offset value for tool length correction. When a tool length correction command (G45, G46, G47, etc.) is commanded, the tool length offset value is an offset for extending and contracting in the moving direction with respect to the movement amount of the axis specified in the block. Value.

"M06T3" on the sixth line is a tool change command for instructing that the machining tool with the tool number 3 is mounted on the spindle. The tool attribute of the machining tool with the tool number 3 is incorporated in the NC machining program as tool attribute information in the comment on the fifth line. When the NC machining program is created by the interactive automatic NC machining program creation device, the tool attribute information of the specific machining tool is set to be immediately before or slightly before the tool change command for mounting the machining tool on the spindle. Inserted into the block. A sequence number equal to the tool number is added before the tool attribute information.

When creating an NC machining program without using the automatic NC machining program creating apparatus, the tool attribute information may be manually inserted. It is easier to understand that the sequence number is inserted, but it is not always necessary. The insertion position may be set before the tool change command for mounting the processing tool of interest on the spindle. The correspondence between the tool attribute information and the tool number is such that the tool number of the working tool mounted on the spindle by a subsequent first tool exchange command corresponds to certain tool attribute information.

Lines 8 to 13 are NC commands for operating the NC machine tool. Lines 15 and 16 are the tool attribute information and the tool change command for the machining tool with tool number 4. The content of the tool attribute information is as follows: "F-FMILL" is a tool type,
2 shows a face mill for finishing. As described above, the tool type including the discrimination of the machining process (finishing process F, roughing process R) is shown even for the same tool type, for example, a face mill (FMILL), a boring bar (BORE), or the like. “TD” indicates a tool diameter, and indicates that the tool diameter correction number is “4” and the tool diameter is “80.0” mm.
“TL” indicates a tool length, and indicates that the tool length correction number is “4” and the tool length is “120.0” mm. 18-2
The 0th line is an NC command for operating the NC machine tool.

When the operator performs a predetermined operation, N
A setup collation screen as shown in FIG. 3 is displayed on the display unit 15 of the C apparatus 1. In the column of tool information in magazine, the contents of the tool information table 141 in magazine in which the tool attribute information of the processing tools stored in each tool pot 3 is stored in association with the tool number are displayed. First, the program number of the NC machining program for which the setup collation is to be performed is entered in the input box at the bottom of the screen. The NC machining program of the input program number is read from the fixed disk device 17 as NC machining program data 143. The NC machining program data 143 is analyzed by the setup collation program 131, and the tool attribute information is stored as the in-program tool information table 142 in association with the tool number. And the tool information table 1 in the program
The contents of 42 are displayed in the tool information column in the program on the setup collation screen.

FIG. 4 is a flowchart showing the processing contents of the setup collation program 131. The process 100 is based on the NC of the program number input on the setup collation screen.
The machining program is read as NC machining program data 143. The next call processing 101 is:
The tool attribute information identification program 132 is called as a subroutine. Tool attribute information identification program 1
Numeral 32 reads the NC machining program data 143 from the beginning and searches for an identifier character "@" following the control-out function character "(" to identify the start of the tool attribute information. Ends before. Then, the start address and the end address of all the tool attribute information are stored.

The next calling process 102 calls the tool information extraction program 133 as a subroutine. The tool information extraction program 133 reads the NC machining program data 143 again from the beginning, and determines the tool type, the tool diameter correction number, the tool diameter, and the like from the start address and the end address of the tool attribute information stored by the tool attribute information identification program 132. The tool length correction number and the tool attribute information of the tool length are extracted. Also, NC machining program data 143
, The first tool change command after the end address of the tool attribute information is searched, and the tool number of the working tool mounted on the spindle by the tool change is identified. The extracted tool attribute information is made to correspond to the tool number. However, if the tool number has already been associated with the tool attribute information, the next tool exchange command is searched for and associated with the first unassigned tool number. Then, all tool numbers and tool attribute information in the NC machining program data 143 are stored in association with each other.

In the next process 103, the in-program tool information table 142 is created from the tool numbers and the tool attribute information stored by the tool information extraction program 133. The contents of the in-program tool information table 142 are displayed in the in-program tool information column of the setup collation screen as shown in FIG. The next calling process 104 calls the mismatch search program 134 as a subroutine. The mismatch search program 134 compares the tool attribute information of the same tool number in the tool information table 141 in the magazine with the tool information table 142 in the program. Remember.

The next call processing 105 calls the display control program 135 as a subroutine. The display control program 135 displays the line of the tool number having a mismatch in the tool attribute information stored by the mismatch search program 134 on the display unit 15 so as to be distinguishable from other lines. In FIG. 3, the line of the mismatched tool number is displayed by being surrounded by a frame. Also,
If there is a mismatch, an error message “Setup is different.” Is displayed at the bottom of the setup collation screen, and the number of mismatched tools is displayed.

In the next judgment 106, it is judged whether or not the "F9: end" key has been pressed, and if it has not been pressed, the process loops as it is. If it has been pressed, the setup collation screen is terminated and called. Return to the original. Although not shown here for the sake of simplicity, there is a process when the "F1: tool change" key and the "F4: write tool information" key in FIG. 3 are pressed. When the "F1: tool change" key is pressed, the processing tool in the mismatched tool magazine is called by the spindle, and the setup can be changed at the spindle position. That is, when the "F1: tool change" key is pressed,
The display of “O = _____” changes to “T = ____”, and when the tool number of the machining tool to be called (the tool number of the mismatched machining tool) is input, the input machining tool is called on the spindle. . However, usually, the changeover is performed not at the main spindle position but at the changeover position of the tool magazine.

When the "F4: Write tool information" key is pressed, the contents of the tool information table 142 in the program are written in the tool information table 141 in the magazine. The worker
According to the instruction on the setup collation screen, the setup is changed so that all the machining tools in the tool magazine match the machining tools in the tool information table 142 in the program. Then, "F
When the "4: write tool information" key is pressed, data is written to the tool information table 141 in the magazine, and the data matches the contents of the tool information table 142 in the program. There is no need to manually input data to the tool information table 141 in the magazine, which simplifies the operation.

In the above embodiment, the entire NC machining program is processed by the tool attribute information identification program, and then the entire NC machining program is processed again by the tool information extraction program. Alternatively, the entire NC machining program may be processed by loop processing.

[0034]

Since the present invention is configured as described above, it has the following effects.

Tool attribute information includes tool type, tool diameter,
To include the tool length, tool diameter compensation number, and tool length compensation number,
It is possible to completely guarantee the sameness of the processing tools, and to prevent deterioration of the processing shape and the processing dimensional accuracy due to a setup error.

Since the identifier character is added to the head of the tool attribute information in the NC machining program, the identification of the tool attribute information can be executed quickly and reliably.

The tool attribute information does not include the tool number,
Since the tool attribute information is made to correspond to the tool number for the closest tool change command after the tool attribute information,
The data amount of the NC machining program can be reduced, and the storage capacity can be reduced and the processing can be speeded up.

[Brief description of the drawings]

FIG. 1 is an NC of an NC machine tool to which the present invention is applied;
It is a figure showing the structure centering on the apparatus 1.

FIG. 2 is a diagram illustrating an example of an NC machining program;

FIG. 3 is a diagram showing a setup collation screen displayed on a display unit 15 of the NC apparatus 1;

FIG. 4 is a flowchart illustrating processing contents of a setup collation program.

FIG. 5 is a diagram showing a list of tool type abbreviation names;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... NC apparatus 2 ... Tool magazine 3 ... Tool pot 10 ... CPU 11 ... Bus 12 ... ROM 13 ... RAM program area 14 ... RAM data area 15 ... Display means 16 ... Input means 17 ... Fixed disk device 18 ... I / O device

Claims (9)

[Claims] In a method for checking a tool used in an NC machine tool having an automatic tool changer, an NC machining program includes a tool type, a tool diameter, a tool length, a tool diameter correction number and a tool length correction number of a processing tool in advance. Insert the tool attribute information including the tool type, tool diameter, tool length, tool diameter compensation number and tool length compensation number of the machining tool stored in the tool magazine (2) into the tool number. The tool information table (141) is stored in association with the tool, and a tool number and tool attribute information corresponding to the tool number are extracted from the NC machining program and stored as a tool information table (142) in the program. The tool information table is compared with the tool information table in the program, and a machining tool having a tool number for which the tool attribute information does not match is detected. NC, wherein a machining tool having a tool number for which the tool attribute information does not match is displayed separately from other machining tools.
How to check the tools used on machine tools. 2. The method according to claim 1, wherein the tool attribute information in the NC machining program is inserted as comment information that does not directly indicate the operation of the NC machine tool. Check method of used tool of NC machine tool. 3. A tool checking method for an NC machine tool according to claim 2, wherein the tool attribute information in the NC machining program is such that the first character of the comment information is a specific identifier character, and N which can be distinguished from comment information
C Tool checking method for machine tools. 4. The N according to claim 2, wherein
C. A tool check method for a machine tool, wherein the comment information indicating the tool attribute information does not include a tool number, and the tool number corresponding to the closest tool change command after the comment information is the tool attribute information. Tool check method of NC machine tool that corresponds to 5. A method for checking a tool used by an NC machine tool having an automatic tool changer, wherein the NC machining program is surrounded by a control-out function character and a control-in function character, and indicates that it is tool attribute information. Tool attribute information including at least the tool type and the tool diameter of the machining tool with the identifier character added at the beginning is inserted in advance, and at least the tool type and the tool diameter of the machining tool stored in the tool magazine (2) are determined. The tool information table in the magazine (141) by associating the included tool attribute information with the tool number
The tool number and the tool attribute information corresponding to the tool number are extracted from the NC machining program and stored as a tool information table in a program (142). The tool information table in the magazine, the tool information table in the program, NC is searched for a machining tool having a tool number whose tool attribute information is inconsistent, and a machining tool having a tool number whose tool attribute information is inconsistent is displayed while being distinguished from other machining tools.
How to check the tools used on machine tools. 6. The N according to any one of claims 1 to 5,
C is a tool checking method for a machine tool.
C characterized by being inserted into the machining program
C Tool checking method for machine tools. 7. A tool check device for use in an NC machine tool having an automatic tool changer, comprising: a tool type, a tool diameter, a tool length, a tool diameter correction number, and a tool number of a processing tool stored in a tool magazine (2). A tool information table storage means (14) in a magazine for storing tool attribute information including a tool length correction number in association with a tool number as a tool information table in a magazine (141); and a tool number and its tool number from the NC machining program. Tool information extracting means (132, 133) for extracting a tool type, a tool diameter, a tool length, a tool diameter correction number and a tool attribute information including a tool length correction number for the tool information table (142). An in-program tool information table storage means (14) for storing the in-program tool information table (142); Comparing the tool information table in magazine (141) with the tool information table in program (142) and searching for a machining tool having a tool number with which the tool attribute information does not match; A display unit (15) capable of displaying a figure; and a display control unit (135) for displaying a processing tool having a tool number whose tool attribute information is inconsistent with another processing tool and displaying the processing tool on the display unit (15). Tool checking device for NC machine tools. 8. A tool checking device for an NC machine tool having an automatic tool changer, wherein tool attribute information including a tool type and a tool diameter of a working tool stored in a tool magazine (2) is converted into a tool number. A tool information table storing means (14) in the magazine which is stored as a tool information table (141) in the magazine in association with the above, and an identifier character indicating tool attribute information following the control out function character in the NC machining program is detected. A tool attribute information identifying means (132) for identifying information up to the subsequent control-in function character as tool attribute information; and a tool number and a tool type and a tool diameter corresponding to the tool number from the NC machining program. The tool attribute information is extracted and extracted based on the identification result of the tool attribute information identification means. An in-program tool information extraction unit (133) to be an in-gram tool information table (142); an in-program tool information table storage unit (14) to store the in-program tool information table (142); A mismatch search means (134) for comparing the table (141) with the tool information table (142) in the program and searching for a machining tool having a tool number whose tool attribute information does not match, and capable of displaying characters and graphics. An NC machine tool comprising: a display means (15); and a display control means (135) for displaying a processing tool having a tool number whose tool attribute information is inconsistent with another processing tool and displaying the processing tool on the display means (15). Used tool check device. 9. N according to any one of claims 7 to 8,
C is a tool checking device for a machine tool, wherein the tool type of the machining tool is N, which is an abbreviated name including a machining process.
C characterized by being inserted into the machining program
Tool checking device for C machine tools.