JPH05108130A - Nc device and nc program preparing method - Google Patents

Abstract

PURPOSE:To efficiently and correctly prepare an NC machining program and to efficiently machine a work. CONSTITUTION:The device is an NC device equipped with NC control parts 14, 50 and 52 drive and control an NC machine tool 30 having a mechanism part, and an NC control part is equipped with a storing means 14 to store a program which becomes a base which is the set of a macro instruction for NC control to drive a measuring means in accordance with the plane machining shape of the work, measuring means 50, 52b, and 26 to measure the machining shape of the work which becomes the object of the measuring and machining based on the program of the base, program data preparing means 50 and 52c to prepare the NC program data based on the result measured by the measuring means and store them in the storing means 14 and driving control parts 50 and 52g to driven and control the NC machine tool.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an NC device having a function of creating a numerical control (NC) machining program, and an NC machining program creating method thereof.

[0002]

2. Description of the Related Art In order to machine a work by operating an NC device having a plurality of axes for machining the work, its drive mechanism section, and a control section, the machining shape, machining direction, tool feed rate, etc. It is necessary to program the data regarding the above into a predetermined form in advance and load the machining program in the storage unit in the NC device. Conventional N
As a method of creating a C machining program, first, in the case of a work shape that is easily theoretically calculated, the coordinate values of the machining shape are obtained by theoretical calculation. If not, a plurality of machining shapes are manually used by using a measuring instrument. I was looking for coordinate values.
Subsequent to this work, an NC processing program was created on a paper tape or the like based on these coordinate value data, and the operator loaded this into a storage unit in the NC device.

[0003]

However, the work of creating such an NC machining program relating to machining of one kind of work requires a considerable amount of work, and the NC machining program must be installed in the NC device used for machining the work. Loading was also laborious and inefficient. Furthermore,
The NC machining program must be recreated each time the type of work is different, and the labor increases further.
It was necessary to improve the efficiency of creating the machining program. Further, the contents of the created NC machining program must be thoroughly checked in advance, and such checking also requires a considerable amount of time and labor. Furthermore, in each of the above-mentioned operations, it is necessary to use a dedicated NC machining program creating device different from the NC device used for machining the work.
Therefore, the present invention makes the NC machining program efficient and
It is intended to be created accurately. Another object of the present invention is to efficiently perform the same machining operation in one or a plurality of NC devices by using the NC machining program created in this way. Furthermore, the present invention does not use a special NC machining program creation device to NC the workpiece.
The purpose is to be able to create even with an NC device for processing.

[0004]

In view of the above-mentioned object, the present invention has a storage means for storing a basic program which is an aggregate of NC control macro instructions for driving a measuring means in accordance with a planar machining shape of a work. And a measuring means for measuring the machining shape of the target work based on the basic program, and a new NC based on the result measured by the measuring means.
Provided is an NC program creating device comprising: a program data creating means for creating program data.

Further, a step of setting and inputting a base program which is a set of NC control macro instructions for driving the measuring means in accordance with the planar machining shape of the work, and a target in accordance with the instruction of the base program. There is provided an NC program creating method characterized by comprising a step of measuring a machining shape of a workpiece and a step of creating new NC program data based on the measured value.

Further, there is provided an NC device having an NC control unit for driving and controlling an NC machine tool having a mechanical portion, wherein the NC control unit drives a measuring means according to a planar machining shape of a workpiece. A storage unit that stores a basic program that is a set of instructions, a measuring unit that measures a machining shape of a workpiece that is a target of measurement and machining based on the basic program, and a result measured by the measuring unit. And a drive control unit for driving and controlling the NC machine tool, the drive control unit being measured by the measuring unit. Work (W
An NC device having an NC program creating function for NC controlling the NC machine tool to machine the work according to the NC program generated by the program data generating means based on the machining shape of M). To do.

Further, a storage means for storing a base program which is a set of NC control macro commands for driving the measurement means in accordance with the planar machining shape of the work, and a measurement target based on the base program. Measuring means for measuring the machining shape of the work; program data generating means for creating NC program data based on the result measured by the measuring means and storing it in the storage means; and an NC machine tool having a mechanical part, A drive control unit for controlling the drive of the NC machine tool, the drive control unit performing NC control of the NC machine tool according to an NC program generated by the program data generating means.
Provided is an NC machine tool system having a C program creating function.

Further, a basic program, which is a set of NC control macro-commands for driving the measuring means in accordance with the planar machining shape of the work, is loaded, and the target work is processed in accordance with the command of the basic program. Measure the machining shape, create new NC program data based on this measurement value,
There is provided an NC machining method characterized by machining a work by the created NC program.

[0009]

According to the NC program creating apparatus of the present invention, the basic program stored in the storage means is read, the measuring means is driven based on the instruction of the program, and the coordinate value of the machining shape of the workpiece is calculated. I want it. Then, new NC program data is automatically created by the program data generation means based on the measured coordinate values. That is, since the base program can be used universally regardless of the shape of the workpiece if the planar machining shape of the workpiece is the same, the NC program creation efficiency is improved.

According to the above NC program creating method, since new NC program data is automatically created, N
C program creation efficiency is improved.

According to the above NC device, the NC control unit stores a basic program, and based on the program, the measuring means is driven to measure the shape of the workpiece to be machined,
The program data generating means automatically creates an NC program based on this result, and the NC machine tool having the mechanical part of the NC device can be driven according to this NC program, so that the NC program is created efficiently. Together with this, the work is efficiently processed.

Further, according to the NC machine tool system, the storage means stores a basic program, the measuring means is driven based on the program to measure the shape of the workpiece to be machined, and the result is based on the result. The program data generating means automatically creates the NC program, and the drive control section can NC-control the NC machine tool according to the NC program generated by the program data generating means. Therefore, the NC program is efficiently created. In addition, as many NC machine tools can be simultaneously operated as possible, so that the work can be efficiently processed.

Further, according to the NC machining method, the workpiece can be immediately machined by the automatically created new NC program, so that the machining efficiency of the workpiece is improved.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail based on the embodiments shown in the accompanying drawings. FIG. 1 is a diagram showing a configuration of an NC device as a first embodiment of the present invention. NC shown in FIG.
The device is an NC machine tool 30 having a spindle equipped with a tool for machining a work (not shown), a drive mechanism unit such as a drive unit for driving the spindle, and an NC machining program storing an NC machining program. A memory 14 having a memory block 14F, an NC macro instruction decoder 50 for decoding the contents of the NC machining program stored in the NC machining program memory block 14F in order to control and drive the NC machine tool 30 according to the NC machining program, It has a machining execution unit 52g for machining the work according to the NC machining control command decoded by the macro command command decoding unit 50. Conventionally, the NC macro instruction decoding unit 50 and the processing execution unit 5
2 g is configured as an NC control unit by a microcomputer or the like.

The memory 14 of the NC device shown in FIG.
A block 14C that stores a base program for generating a new NC machining program, a new NC machining program storage block 14E that stores a newly generated NC machining program, and a base program and an NC machining program It has a directory table 15 for managing the storage state.

The NC device shown in FIG. 1 further measures a workpiece (not shown) to be machined based on the base program from the block 14C in which the base program is stored, and newly creates a new NC machining program. Open processing unit 52 for generating a new NC machining program in the new NC machining program storage block 14E in real time.
a, measuring unit 52b, NC machining program generating unit 52c,
It has a close processing unit 52d.

The NC device also has a touch sensor 26. The touch sensor 26 is used to measure the shape of a workpiece to be measured by the measuring unit 52b mounted on the NC machine tool 30 in a new NC machining program generation mode described later.

More preferably, the NC device is a simulation unit 52e for simulating the generated new NC machining program before machining a workpiece, and further, by applying a predetermined offset before actually machining the workpiece, NC.
It has an offset processing unit 52f for driving the machine tool 30.

NC macro instruction decoding unit 5 in this embodiment
0 not only decodes the contents of the NC machining program stored in the NC machining program storage block 14F and controls the machining of the work by the machining executing unit 52g as in the conventional case, but also the open processing unit 52a described above. The macro instruction for the measuring unit 52b, the NC machining program generating unit 52c, the close processing unit 52d, the simulation unit 52e, and the offset processing unit 52f is also decoded.

The open processing section 52a to the modification executing section 52g for executing the macro instruction by the NC macro instruction decoding section 50 described above constitute an NC macro instruction executing section 52. More specifically, the processing contents of the NC macro instruction execution unit 52 are stored in a read-only memory (ROM) as a control program, and the NC macro instruction decoding unit 5
0 is the central processing unit (C
When a corresponding control program, for example, an open processing program is implemented by the CPU, the CPU functions as a corresponding control unit, for example, the open processing unit 52a.

FIG. 2 shows the overall operation mode of the NC device shown in FIG. The NC device first stores a program based on the block 14C of the memory 14 (step 6).
0). Next, the touch sensor 26 is mounted in place of the tool mounted on the spindle of the NC machine tool 30, and the block 1
Based on the basic program in 4C, the open processing unit 5
2a, measuring unit 52b, NC machining program generating unit 52c
And the close processing unit 52d is operated to generate a new NC machining program to generate the storage block 1 in the memory 14.
It is stored in 4E (step 61). As described above, in the present invention, the new NC machining program is generated in the NC device for machining the workpiece.

If necessary, the operator can test the contents of the newly created NC machining program (step 62). The test contents include a simulation operation for graphically displaying the contents of the new NC machining program, and an offset operation for mounting the tool on the spindle of the NC machine tool 30 and driving the tool away from the actual work by a predetermined offset. As described above, according to the present invention, the simulation operation and the offset operation can be performed using the NC device that actually processes the work.

Thereafter, the machining execution unit 52g is operated to actually machine the work (step 63). Hereinafter, the details of the contents of step 61 and step 62 will be mainly described.

A new NC that is a collection of NC macro instructions
FIG. 7 shows an example of a program that is a basis for generating a machining program. This base program is stored in block 14C in memory 14. Further, the NC machining program for machining the workpiece which has already been created is stored in another block 14F. Further, a new NC program generated based on the above-mentioned base program is stored in the block 14E searched by the open processing unit 52a described later.

Each of these NC machining programs is managed by a directory table 15 which will be described later with reference to FIG. The NC processing program in the memory 14 is decoded by the NC macro instruction decoding unit 50, and the corresponding processing unit in the NC macro instruction execution unit 52 is operated according to the decoding result.

FIG. 3 shows in detail the flow of processing shown in FIG. Step 70: NC macro instruction decoding unit 50 causes block 14 of memory 14 to
An NC statement or a macro instruction in a narrow sense is sequentially read from the base program loaded in C for each block (hereinafter referred to as one step). In the following, the NC statement and the macro instruction in the narrow sense are collectively referred to as (NC) macro instruction. NC
The macro instruction decoding unit 50 decodes the read macro instruction as described below and drives the corresponding processing unit in the NC macro instruction execution unit 52.

Steps 71 and 72 The NC macro instruction decoding unit 50 determines whether the read macro instruction is an open instruction, and if it is an open instruction, it drives the open processing unit 52a. The driven open processing unit 52a performs open processing. Thereafter, the control of the NC macro instruction execution section 52 returns to step 70.

The open command is a process of searching a memory block of a new NC machining program based on the original program, declaring that the block is used, and registering the block.

Steps 73 to 76 If it is not an open instruction, the NC macro instruction decoding section 50 advances the decision processing of step 73 to decide whether it is a program generation instruction (step 73). If it is a program generation command, the measuring unit 52b is driven to measure the workpiece to be measured (step 74), and the NC machining program generating unit 52c is driven to generate an NC machining program from this measurement result (step 75), and further writes the generated NC machining program in the searched new NC machining program storage block (step 76). afterwards,
The control of the NC macro instruction execution unit 52 returns to step 70.

As a result, an NC machining program for the target work can be generated in the NC device.

Steps 77 and 78 The NC macro instruction decoding unit 50 judges whether the decoded macro instruction is a close instruction or not if it is not a program generation instruction (Step 77). If it is a close instruction, it drives the close processing unit 52d. (Step 78). As the close processing, the close processing unit 52d writes a code indicating the end of the new NC machining program stored in the new NC machining program storage block 14E at the end of the new NC machining program. Thereafter, the control of the NC macro instruction execution part 52 returns to step 70.

Steps 79 and 80 The NC macro instruction decoding section 50 further judges whether or not it is the simulation operation mode (step 79). If it is the simulation operation mode, the simulation section 52e is driven to simulate the contents of a new NC machining program. (Step 80). In order to perform this simulation operation, the operator inputs a command instructing the simulation operation to be performed using an operation panel such as a keyboard in advance, and the flag in that case is stored in the memory 14. If this flag is a simulation operation command, the simulation unit 52e is driven. As the contents of this simulation, a new NC machining program is displayed in a three-dimensional graphic form. by this,
The contents of the new NC machining program can be confirmed in the state of the three-dimensional figure before machining the work. The control of the NC macro instruction execution unit 52 then returns to step 70.

If it is not a simulation instruction in steps 81, 82 and 85 , the NC macro instruction decoding unit 50 proceeds to step 81 and determines whether it is an offset instruction. If it is an offset instruction, it drives the offset processing unit 52f in step 82. , NC The tool mounted on the spindle of the machine tool 30 is offset up by a predetermined height to try the newly created NC program stored in the storage block 14E. Since the tool is separated from the work by a predetermined height due to this offset, the work is not actually machined, but the tool moves according to the machining trajectory, so that it is possible to confirm the operation before actually machining the work. Thereafter, the control of the NC macro instruction execution section 52 returns to step 70.

Steps 83, 84 and 85 The NC macro instruction execution section 52 judges whether or not the decoding macro instruction is a modification instruction (step 83). For processing instructions,
As in the conventional case, the machining execution unit 52g is driven to create a new NC.
The workpiece is actually machined based on the machining program (step 84). Then, the process returns to step 70 again. If it is not a machining command, it is judged in step 85 whether the machining is completed. If it is not completed, the process returns to step 70. In the machining processing of the work based on this new NC machining program, the macro command is sequentially decoded by the NC macro command decoding unit 50 step by step, and the work is processed by the tool mounted on the spindle of the NC machine tool 30.

FIG. 4 shows the configuration of an NC machine tool system as a second embodiment of the present invention. This NC machine tool system includes a microcomputer 10, a tape reader 18,
CRT display 20, operation panel 22 such as a keyboard,
The measuring device 24 has one or a plurality of machine tools 31.

Each of the machine tools 31 is an NC machine tool 30 and a spindle 30 on which a tool T is mounted, like the conventional machine tools.
Work table 30T, NC on which S and work W are placed
It has a controller 32. The NC control unit 32 has a memory for storing an NC machining program, an NC machining instruction decoding unit for deciphering the contents of the stored NC machining program, and a macro instruction execution unit corresponding to the machining execution unit 52g. The machine tool 31 further has an input unit 32I for receiving a new NC machining program from the microcomputer 10. One or more machine tools 31 can be arranged. A spindle 30S to which a tool T of the machine tool 30 is attached, and a work table 30 on which a work W is placed.
It is possible to three-dimensionally move relative to T by a known mechanism.

Microcomputer 10 and measuring device 24
And the work WM to be measured placed on the table 24T in cooperation with the random access memory (RAM) 14
The touch sensor 26 is moved based on the original program stored in A, and a new NC machining program is generated based on the movement result.

The measuring device 24 has a spindle 24S to which a touch sensor 26 is attached, a table 24T on which a work WM to be measured is placed, and a controller 25.
As will be described later, the work WM to be measured is also the work W to be actually processed when the measuring device 24 operates as a normal NC device.

The measuring device 24 is a device for obtaining the coordinate value group of the machining contour of the workpiece W to be machined or the workpiece WM to be measured which has exactly the same shape and dimensions. The main shaft 24S and the table 24T of this device are driven by a mechanism similar to a well-known mechanism in a general machine tool or the like, and are configured to be capable of three-dimensional relative movement, and the main shaft is touched. The sensor 26 is attached.

The microcomputer 10 includes a CPU 1
2, RAM 14A, read only memory (ROM) 1
It has 5A and an input / output unit (I / O) 16.
In this embodiment, the memory 14 shown in FIG. 1 is realized by the RAM 14A in the microcomputer 10, and the NC macro instruction decoding unit 50 shown in FIG. 1 is incorporated in the microcomputer 10 as the NC macro instruction decoding unit 50A. The control program of the open processing unit 52a, the control program of the measuring unit 52b, the control program of the NC machining program generating unit 52c, the control program of the closing processing unit 52d, the control program of the simulation unit 52e, and the offset processing shown in FIG. The control programs of the part 52f are read-only memories (RO
M) 15A.

However, the processing execution unit 52g shown in FIG.
And an NC macro instruction decoding unit 5 which decodes the contents of the NC processing program executed by the processing execution unit 52g.
A part of 0 is stored in the control unit 25.

The tape reader 18 connected to the microcomputer 10 reads the base program from a magnetic tape on which the base program is recorded, a paper tape or the like, and stores it in the base program storage block 14C in the RAM 14A. It is a thing. The operation panel 22
Therefore, the tape reader 18 is not necessary when the operator sequentially loads the original program. The CRT display 20 is for three-dimensionally displaying a simulation result graphically, and a plotter may be provided for recording and a plotter may be provided instead of the CRT display 20. The mechanical part of the NC machine tool 30, the touch sensor 26, and the measuring section 52b shown in FIG.
It corresponds to.

In the NC machine tool system of this embodiment shown in FIG. 4, the measuring device 24 and the microcomputer 10 cooperate to generate a new NC machining program based on the original program, and the new NC machining program is obtained. An example in which the work W is machined by one or a plurality of machine tools 31 based on the NC machining program will be described. That is, this embodiment is
One machine tool is operated as the measuring device 24, the microcomputer 10 and the measuring device 24 are made to cooperate with each other to generate a new NC machining program, and one machine tool 31 is generated based on this new NC machining program. Or
A configuration is shown in which a plurality of machine tools 31, 31A can process a plurality of works W at substantially the same time. RAM14
The new NC machining program stored in A is I / O16.
Is input to the input unit 32I through the NC control unit 32 and is executed by the NC control unit 32.
The work W placed on S is processed.

Further, in this embodiment, a part of a normal NC device is made to function as the measuring device 24, the microcomputer 10 is connected to this NC device, and a new NC machining program is created from the original program. It shows that the device can be configured.

Further, in this embodiment, after a new NC machining program is generated from the original program, the control unit 25 existing originally is utilized to mount the tool T in place of the touch sensor 26 in the measuring device 24. As a result, the control unit 25 is operated based on the new NC machining program stored in the RAM 14A of the microcomputer 10.
2 and the measuring device 24 are capable of processing a plurality of works W in parallel at substantially the same time as the machine tool 31.

In the following, as a concrete example, as shown in FIGS. 11 and 12, a cylindrical work W to be measured is shown.
The plane shape for attaching another cylindrical member to M is circle C
An example of processing the hole CH that is The plane is parallel to the plane including the X axis and the Y axis, and the axis perpendicular to the plane is the Z axis.

The above-described basic program can be commonly used to generate a new NC machining program for workpieces having the same planar shape of the hole to be machined. If the planar shape of the machined hole of the workpiece W is different, Different programs are used according to the shape of the plane of the processed hole. In other words, in the method and apparatus according to the present invention, the shape of the hole CH to be formed is not changed even though the cylindrical work W is a work of other shape such as a cube, although the description below is unchanged. If they are different, the contents of the underlying program will be different.

FIG. 7 shows a specific example of the basic program MMM consisting of macro commands for automatically creating an NC program for machining the hole CH having a circular planar shape on the side surface of the cylindrical work WM by the machine tool 31. .. The symbols N01 to N17 at the left end indicate the program step numbers of the base program for generating a new NC machining program having the shape shown in FIG. FIGS. 8 and 9 show the contents of this base program by a flow chart.

FIG. 11 shows the result of creating a new NC machining program based on the original program. Below, Figure 7
The operation of generating a new NC machining program from the original program will be described with reference to FIGS.

Program Step N01 This program step N01 shows an open macro instruction: POPN, 101. That is, this macro command: POPN
(Program Open), 101 is a new NC
This indicates that the creation of the machining program number 101 is started. The required memory size at this time is given by the operator via the operation panel 22 of FIG. 4, for example.

CPU 12 in the microcomputer 10
The NC macro instruction decoding unit 50A therein decodes the open macro instruction stored in the block 14C of the RAM 14A and drives the open processing control program stored in the ROM 15A. This open processing control program runs on the CPU 12 and refers to the directory table 15 (FIG. 6) in the RAM 14A to create a new N
C Search for a sufficient memory area to store the machining program.

The directory table 15 stores a new program number, a head address where the program is stored, and the size of the program.
In the empty directory table, the program number, the start address, and the size are all "0". The contents of the corresponding directory table 15 are cleared by the operator instructing the used program via the operation panel 22.

The RAM 14A is managed using the directory table 15 with 512 bytes as one sector, for example. In this example, as shown in FIG. 5, sectors 14BA, 14BB, 14C, 14D, 14E have already been added.
Stores various NC machining programs. For example, the NC machining program XXX has a capacity of 2 blocks and is stored over two sectors 14BA and 14BB. Further, another NC machining program YYY is stored in the sector 14D. The base program MMM described here is a sector 14C having a size of one sector.
It is stored in.

The program YYY offsets the tool T from the work W by a predetermined height in the machine tool 31 for the purpose of testing a new NC machining program 101 to be created, which will be described below. belongs to.

The open processing control program refers to the directory table 15 and creates a new N in the RAM 14A.
The block 14E for storing the C machining program is determined, and the program number in the directory table 15 =
101, head address = 401 and size = 1 block are registered. Furthermore, the open processing control program is shown in Figure 1.
As shown in 0, the open code: O101 is written in the head address 401 of the secured block 14E. This completes the processing of the open macro instruction in program step N01.

[0056] Program step N02 7 program write macro instruction shown in the program step N02 to: PWRT, is decrypted in the NC macro instruction decode unit 50 (G92X0Y0Z100), ROM
It is executed by a part of the measurement control program stored in 15A, and this content is stored in the address 402 shown in FIG. Here, PWRT is Program Writ
e, G92 indicates a coordinate system setting command, X0 indicates that the set X coordinate value is 0 (mm) in absolute coordinates, and Y0 indicates the set Y coordinate value in absolute coordinates. 0
(Mm), and Z100 indicates that the set Z coordinate value is 100 (mm) in absolute coordinates.

Program step N03 Program write macroinstruction defined in program step N03: PWRT, (G90G01F1000) is also decoded by NC macroinstruction decoding unit 50 in the same manner as program step N02, and block 14E in RAM 14A.
Is stored in the address 403. This macro command indicates that the linear interpolation is used and that the feed speed for moving the touch sensor 26 is 1000 (mm / min). .

Program steps N04, N05 Macro instruction in program step N04: V1 = 0 indicates that the initial value of the angle division variable V1 is 0 as the first variable. Also, program step N05
Macro instruction in: V2 = 70 indicates that the radius of the circle C is 70 (mm) as the second variable. Program step N06, N07 Macro instruction in program step N06: G90G00X [V2] Y0Z150 is a start point, X = V2, Y = 0 (mm), Z = 150
It indicates that the touch sensor 26 is positioned at (mm). Code G00 is a movement command. By this,
The touch sensor 26 has X = V2 = 70 (mm), X = 0.
(Mm) and Z = 150 (mm). Macro instruction in program step N07: G00Z150 maintains the X coordinate and the Y coordinate from the coordinate of program step N06, while changing the Z coordinate from 150 (mm) to 100.
Indicates a macro command to lower to (mm). The touch sensor 26 is moved by executing the macro instructions of the program steps 04 to N07 described above by the measurement control program.

Gram step N 08, 09, 10,
11 Macro instruction in program step N08: V3 = [V2] * COS [V1] is the third variable V3, and the X coordinate as the measuring point on the circumference of the circular work WM is V2 * COS [V1]. It indicates to calculate. Macro instruction in program step N09: V4 = [V2] * SIN [V1] is the fourth variable V4, and the Y coordinate as the measurement point on the circumference of the circular work WM is calculated as V2 * SIN [V1]. It shows that you do. Macro command in program step N10: G90G00X [V3] Y [V4] is the touch sensor 2 at the coordinate position defined by the coordinate position.
6 is to be positioned. As described above, the touch sensor 26 is moved to the coordinates defined by these coordinate positions. The macro command in the program step N11: G61Z50F3000 causes the touch sensor 26 to move at an absolute position 50 in the Z-axis direction at a speed of 3000 (mm / min). (Mm) is shown. When the macro command is executed, the touch sensor 26 descends, and when the touch sensor 26 contacts the work WM, the touch sensor 26 stops. In this case, Z coordinate position = 100 (m
a).

[0060] macro in the program step 12 the program step N12 instructions: G04F0.1 in position where the touch sensor 26 is positioned, movement of the touch sensor 26 indicates possible to dwell only 0.1 seconds to stabilize (retention) .. Therefore,
In the measurement control program, the touch sensor 26 is the work W.
After contacting M and stopping, it is stopped for 0.1 second, and then
The Z-axis coordinate position V5 of the touch sensor 26 is read.

[0061] Macro at program step N13 program step N13 instructions: PWRT, (X) V3 [53], (Y) V4 [53],
(Z) V5 [53]: [53] has 5 digits above the decimal point and 3 digits below the decimal point. V5 is read from the variable V5 containing the measured Z coordinate value and written to the specified address. Shows.
The NC macro instruction decoding unit 50 decodes this macro instruction and drives the NC machining program generation control program, and this NC machining program generation control program measures the Z coordinate value V5 measured according to this macro instruction as the X and Y coordinate values. Block 14E in RAM 14A along with V3 and V4
Write to the specified address of. As a result, as shown in FIG. 10, the address 4 of the block 14E of the RAM 14A is
04, X coordinate value 70.000 (mm), Y coordinate value 0
(Mm), Z coordinate value 100.000 (mm) is written.

Program Steps N14, N15 Macro Instructions in Program Step N14: V1 = V1 + 10, IF, V1 = 360, GO, -7 first set the angle of the first variable V1 which is an angle division variable to 10
Degree is added, and when the angle is within 360 degrees, the program step N0 before the program step by 7 steps
It is shown to return to 7 and repeat the processing of the above-mentioned program steps again. If it is +7, it means that only 7 steps are taken. When the angle variable V1 is within 360 degrees, the above process is repeated to measure the coordinate data at the 37th position as shown in FIG.
7 sets of coordinate measurement data are in the block 14E of the RAM 14A
It is written continuously in. When the angle variable V1 becomes 370 degrees or more, it means that the measurement for the hole CH has been completed, and the process proceeds to the program step N15. Macro command in program step N15: Z150 indicates that the Z coordinate of the touch sensor 26 is raised to 150 (mm) and retracted at the end of the above measurement and a new NC machining program. The measurement control program responds to the macro command by the touch sensor 26.
In the Z-axis direction.

Program Steps N16, N17 Macro Instructions in Program Step N16: PCLS, 101 indicates the closing processing of the new NC machining program 101. When the NC macro instruction decoding unit 50 decodes this macro instruction, it drives the close processing unit 52d. RO
The close processing control program in M15A executes such a macro instruction. That is, the code data: M02 indicating the program close stored in the next program step N17 is input, and as shown in FIG.
A new NC generated by the touch sensor 26 measuring M.
This code data M02 is written in the final position of the machining program to clearly indicate the end of the new NC machining program in the block 14E of this RAM 14A. Therefore, the new NC machining program 101 is shown in FIG.
O101 written in address 401 as shown in
It is stored in the range of M02 written to the address 411.

The measurement locus of the touch sensor 26 described above will be described with reference to FIG. 11. The measurement by the touch sensor 26 starts at the measurement point P01, and then the touch sensor 26 moves clockwise to the measurement point P02. Then, the touch sensor 26 sequentially moves in this direction. And the measurement point P
After 35, the touch sensor 26 returns to the original measurement point P01 and the measurement is completed. A new NC machining program is generated in the process of measuring the coordinate position of the touch sensor 26, and the new NC machining program is sequentially written in the sector 14E in the RAM 14A. As described above, referring to the basic program for machining the circular hole on the surface of the cylindrical pipe, the machining shape of the hole CH as the actual work WM is measured by using the touch sensor 26, and a new work W is newly measured. Automatic NC machining program can be created automatically.

The new NC machining program shown in FIG. 10 generated in this way and stored in the RAM 14A in the microcomputer 10 is the NC control unit 32 from the I / O 16 via the input unit 32I of the machine tool 31. Can be input into the memory of the NC control unit 32, and the work W placed on the work table 30T can be processed using the tool T mounted on the spindle 30S. However, after a new NC machining program is generated, its contents can be tested to confirm the machining situation. As a test method,
There is simulation and offset processing.

In this simulation, the operator inputs a new NC machining program number and a simulation command flag via the operation panel 22 such as a keyboard. The NC macro instruction decoding unit 50 reads the simulation flag and drives the simulation unit 52e. In the embodiment shown in FIG. 4, the simulation unit 52e is activated as a simulation processing program stored in the ROM 15A, and this simulation processing program refers to the directory table 15 and stores a new NC machining program 101. The sector 14E in the RAM 14A is searched, the contents are checked, and the addresses 404 to 44 shown in FIG.
The contents of the new NC machining program stored in 0 are linearly interpolated to create display graphic data, and CR
It is displayed on the T display 20. FIG. 13 shows an example of the display. The operator can legally add a new NC from this display state.
It can be confirmed that the machining program has been generated.

After this simulation, a new NC machining program is transferred to the memory in the NC controller 32,
Before processing the work W, the machine tool 31 can perform an offset operation and further perform a preliminary operation check. In this offset operation check, the spindle 30S is raised by a predetermined height, for example, 50 (mm) from the Z-axis coordinate defined by the new NC machining program, and the tool T is actually moved on the upper surface of the work W. It is a thing. This offset processing is instructed by the operator via the operation panel (not shown) of the machine tool 31, and is performed by the NC control unit 32. As a result, the final confirmation operation can be performed in each machine tool 31 for the new NC machining program generated as described above.

After these tests, as shown in FIG.
The work W is actually machined by the tool T mounted on the spindle 30S. This work machining operation is performed by a plurality of machine tools 31,
31A can be operated simultaneously. As a result, it is possible to machine a plurality of works simultaneously under the same machining conditions.

Further modifications of the second embodiment of the present invention will be described. In the NC machine tool system as the second embodiment shown in FIG. 4, the measuring device 24 and the microcomputer 10 generate a new N based on a basic program.
Although the use as a dedicated device for generating the C machining program has been described, the processing of the measuring device 24 and the microcomputer 10 can be performed in the machine tool 31. Normally, the NC control unit 32 in the single machine tool 31 has a function of processing an NC macro command. A part of the NC macro instruction decoding unit 50 and the NC macro instruction execution unit 52 for generating a new NC machining program from the above-mentioned base program is added to the NC control unit 32, and the touch sensor 26 is used instead of the tool T. The spindle 30
If it is mounted on the S, as in the case described above, the single machine tool 3
In 1, the new NC machining program can be generated based on the original program. Therefore, the machine tool 31 itself can generate a new NC machining program based on the original program, confirm the offset operation, and then actually machine the work W.

Further, after generating a new NC machining program from the basic program, the touch sensor 26 mounted on the spindle 24S of the measuring device 24 is replaced with the tool T and mounted, so that the measuring device 24 is the same as the machine tool 31. In addition, the workpiece WM placed on the table 24T as a machine tool can be actually machined based on the new NC machining program generated as described above.

The base program is input to the RAM 14A in the microcomputer 10 according to the shape of the work to be processed. For example, in the above example, the work W is a cylinder, but the shape of the work W is arbitrary. Work W
In the case of forming a hole having a triangular shape instead of a circular shape, another basic program for measuring a triangular hole different from the original program MMM is necessary, but the difference is that the touch sensor moves. It is only the designation of the value of the plane coordinate (X, Y), and the basic idea, that is, the idea of designating the plane coordinate (X, Y) and measuring the value of the Z coordinate by the touch sensor 26 is the same. Is. Therefore, the present invention can be applied regardless of the planar shape. That is, according to the NC program creating apparatus and method of the present invention, N
C programs can be created.

In the above description, the target is a machine tool, but the present invention can be applied whether the machine tool is a machining center or an electric discharge machine.

[0073]

As is apparent from the above description, according to the present invention, an NC program can be efficiently created by using a single machine tool for NC machining.
A C machining program can be used to machine a workpiece with the machine tool. As a result, a dedicated device for generating a new NC machining program is not required in addition to the machine tool as in the conventional case. In the present invention, only the basic program is required, and N pieces are separately prepared for works of various shapes generated by utilizing the basic program.
There is no need to generate a C machining program. Further, in the present invention, since the contents of the new NC machining program generated can be confirmed in advance, safe machining of the work can be realized. Further, in the present invention, a typical work piece is measured on a machine tool to generate a new NC machining program, and then the new NC machining program is machined on a plurality of workpieces by a plurality of machine tools almost simultaneously. be able to. As a result, high-quality workpieces can be efficiently processed under the same conditions. Also in this work, a dedicated NC machining program generating device is not particularly required. According to the present invention, a new NC machining program for an actual workpiece can be generated in real time from a basic program for machining a typical workpiece shape.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an NC device according to a first embodiment of the present invention.

FIG. 2 is a block flow chart showing an overall operation process of the NC device shown in FIG.

FIG. 3 is a flowchart mainly showing an operation of generating a new NC machining program and confirming its contents in the operation processing shown in FIG.

FIG. 4 is a configuration diagram of an NC machine tool system as a second embodiment of the present invention.

FIG. 5 is a diagram illustrating a method of using a memory in which various programs are stored as an embodiment of the present invention.

6 is a diagram showing a directory table for managing the use of the memory shown in FIG.

FIG. 7 shows details of a base program for forming holes in the surface of a cylindrical tube according to an embodiment of the present invention.

FIG. 8 is a portion of a flow diagram of the underlying program of FIG.

9 is a portion of a flow chart of the underlying program of FIG. 7.

FIG. 10 is a diagram showing the contents of a new NC machining program created by the present invention based on the basic program shown in FIG. 7.

11 is a block diagram of the program of FIG. 7 based on FIG.
FIG. 6 is an explanatory diagram of the movement of the touch sensor during the creation of the new NC program of FIG.

12 is a diagram illustrating the movement of a tool according to the new NC machining program shown in FIG.

13 is a diagram showing a graphic in which the contents of the new NC machining program shown in FIG. 10 are displayed on a CRT display.

[Explanation of symbols]

 10 Microcomputer 14 Memory 14A Machining program storage RAM 15A Macro command control program storage ROM 15 Directory table 16 Input / output device 18 Tape reader 20 Display 22 Operation panel 24 Measuring device 24S Spindle 24T table 26 Touch sensor 30 NC Machine tool 31 Machining Machine 32 NC control unit 30S Spindle 30T Work table 32I Control unit input unit 50 NC macro instruction decoding unit 52 NC macro instruction execution unit 52a Open processing unit 52b Measuring unit 52c NC machining program generation unit 52d Close processing unit 52e Simulation unit 52f Offset Processing part 52g Machining execution part T Tool W Work WM Work to be measured

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Kato 2068-3 Ooka, Numazu City, Shizuoka Prefecture, Toshiba Machine Co., Ltd.Numazu Works (72) Inventor Takao Adachi 2068-3, Ooka, Numazu City, Shizuoka Toshiba Machine Co., Ltd., Numazu Business In-house

Claims (20)

[Claims] 1. An NC machine tool (30) having a mechanical portion.
An NC device comprising an NC control unit (14, 50, 52) for driving and controlling the
52) is a storage means (14) storing a basic program which is a set of NC control macro instructions for driving the measuring means in accordance with the planar machining shape of the work (WM), and a storage means (14) based on the basic program. Measuring means (5) for measuring the machining shape of the workpiece (WM) to be measured and machined.
0, 52b, 26), program data generating means (50, 52c) for creating NC program data based on the result measured by the measuring means, and storing the NC program data in the storage means (14), and the NC machine tool. Drive control section (50, 5
2g), and the drive control unit (52g) processes the work according to the NC program generated by the program data generating unit (52c) based on the work (WM) machining shape measured by the measuring unit. In order to do so, an NC device having an NC program creation function for controlling the NC machine tool. 2. A storage means (14A) storing a basic program, which is a set of NC control macro instructions for driving the measuring means in accordance with the planar machining shape of the work (WM).
And a workpiece (W to be measured based on the program of the base)
M) measuring means (24) for measuring the processed shape, and program data generating means (50A, 15A) for creating NC program data based on the result measured by the measuring means and storing the NC program data in the storage means (14A). ), An NC machine tool (30) having a mechanical part, and a drive control section (32) for driving and controlling the NC machine tool, the drive control section (32) including the program data generating means (50A, 15A) is an NC machine tool system having an NC program creating function, wherein the NC machine tool is NC controlled according to the NC program generated by 15A). 3. The measuring means has a touch sensor that outputs a contact signal by contacting a work to be measured, receives the contact signal from the touch sensor, and measures the coordinate value of the contact position. 2. The method according to claim 2, wherein
An NC machine tool system having the NC program creation function described in 1. 4. The NC machine tool system having an NC program creating function according to claim 3, wherein the touch sensor is a touch sensor which is attached to a spindle of the NC machine tool to operate. 5. The NC program creating function according to claim 3, wherein the system includes a drive device that is separate from the spindle of the NC machine tool and that drives the touch sensor. NC machine tool system. 6. The NC machine tool system having an NC program creating function according to claim 5, wherein the separate drive device is provided with a spindle of another NC machine tool. 7. The NC having a plurality of NC machine tools and a plurality of drive control units, each drive control unit being the created NC.
7. An NC program creation function according to any one of claims 2 to 6, characterized in that the NC machine tool corresponding to the drive control unit is controlled by reading the program.
C machine tool system. 8. The system according to claim 2, further comprising display means for displaying a machining trajectory as a graphic by using the created NC program. An NC machine tool system with an NC program creation function. 9. The NC created in the state where the system is offset from the work by a predetermined height.
9. An NC machine tool system having an NC program creating function according to any one of claims 2 to 8, further comprising offset means for trying a program. 10. Storage means (14, 1) for storing a basic program which is a set of NC control macro-commands for driving the measuring means according to the planar machining shape of the work (WM).
4A) and the target work (WM) based on the program of the base
Measuring means (52b, 26, 24) for measuring the processed shape of
And create new NC program data based on the results measured by the measuring means (52b, 26, 24),
An NC program creating apparatus comprising: a program data generating unit (50, 52c, 50A, 15A) to be stored in the storage unit (14, 14A). 11. The base program is N to be created.
11. The NC program creation according to claim 10, further comprising a macro instruction for storing, in a memory, a correspondence table of a size required for storing a C program, an address of a program memory area and the NC program name to be created. apparatus. 12. The measuring unit has a touch sensor that outputs a contact signal by contacting a work to be measured, and receives the contact signal from the touch sensor to measure the coordinate value of the contact position. The NC program creation device according to claim 10, wherein 13. The storage means for storing the base program searches for a program memory area of a size required to store an NC program to be created, and determines the address of the program memory area and the NC program to be created. And a macroinstruction storage unit for operating the open processing means for storing the correspondence table in the memory, and a macroinstruction for moving the measuring means to a point which is a predetermined height position and is a plane position of the measurement point of the workpiece to be measured. From a memory unit, a macro command memory unit that lowers the measuring unit in the height direction, and a position coordinate in the height direction and a coordinate of the plane position measured by the measuring unit coming into contact with the workpiece, NC A macro command storage unit that issues a command to create one step of a program, and the one step is managed by the correspondence table. A macro instruction storage unit to be written into the program memory area, NC program generating device according to claim 10, characterized in that the subsequent command function of the mobile was and a macro instruction storage unit repeated by the number of total measuring points. 14. A step of setting and inputting a base program, which is an aggregate of NC control macro instructions for driving the measuring means in accordance with the planar machining shape of the work, and the target program is set according to the instructions of the base program. An NC program creating method, comprising: a step of measuring a machining shape of a workpiece, and a step of creating new NC program data based on the measured value. 15. The step of inputting the setting of the base program searches for a program memory area of a size necessary for storing the NC program to be created, and sets the address of the program memory area and the NC program to be created. A step of executing an instruction to operate the open processing means for storing the correspondence table in the memory, and an instruction to move the measuring means to a point which is a predetermined height position and a plane position of the measurement point of the workpiece to be measured. A step of executing, a step of executing a command to lower the measuring means in the height direction, and a position coordinate in the height direction and a coordinate of the plane position measured by the measuring means coming into contact with the work. To execute an instruction to create one step of the NC program from the step of: Claim to a step of executing an instruction to write to the frame memory area, characterized by a step of executing an instruction to repeat the following instruction to the mobile by the number of total measuring points 1
4. The NC program creation method described in 4. 16. A step of setting and inputting a base program, which is an aggregate of NC control macro instructions for driving a measuring means according to a planar machining shape of a work, and a target according to the instruction of the base program. NC comprising a step of measuring a machining shape of a workpiece, a step of creating new NC program data based on the measured value, and a step of machining a workpiece by the created NC program. Processing method. 17. The step of creating new NC program data further comprises the step of simulating the NC program data before machining a workpiece by the NC program later, and displaying the result of this simulation. The NC according to claim 16, characterized in that
Processing method. 18. The storage means stores the stored NC program in a storage unit for the program name of the NC program, a storage unit at the head address of the storage region for the NC program, and a size for the storage region for the NC program. 2. The NC device according to claim 1, wherein the NC program management structure includes a directory table storage unit that associates with and the management unit. 19. The storage means stores the stored NC program in a storage unit for the program name of the NC program, a storage unit at the beginning address of the storage region for the NC program, and a size for the storage region for the NC program. The NC process machine system according to claim 2, wherein the NC program management structure is managed by including a storage unit of a directory table that is associated with the NC program management structure. 20. In the storage means, the stored NC program stores a program name storage section of the NC program, a storage section at a head address of the NC program storage area, and a size of the NC program storage area. 11. The NC program creation apparatus according to claim 10, wherein the NC program management structure is provided with a managed NC program management structure including a storage unit for a directory table associated with the above.