JPH06124107A - Numerical control system - Google Patents

Abstract

PURPOSE:To perform continuous work over entire work shapes by generating a specific shape based on interactively inputted information, then generating a final work shape by coupling the parts of the specific shape with a teaching function and performing the work according to the final work shape with a playback function. CONSTITUTION:A work guidance menu is selected at a step S1, a teaching mode is started at the step S2 and the specific shape is inputted corresponding to a guidance screen at the step S3. Successively, a tool is moved by operating a manual pulse generator or the like at the step S4, it is set at the terminating position of the specific shape and a teaching button is turned on at the step S5. Then, a tool position and a shape type as a work route are stored corresponding to an ON signal at the step S6, whether teaching is completed or not is discriminated at the step S7 and when teaching completion is selected in the case of completion, the final work shape is stored as an NC command sentence at the step S8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical control device for controlling a machine tool, and more particularly to a numerical control device for controlling a machine tool for machining a prototype or the like.

[0002]

2. Description of the Related Art The technological progress of numerically controlled machine tools is remarkable, and it is possible to machine workpieces with complicated shapes at high speed and with high precision. Further, at present, a workpiece having a complicated shape cannot be processed without a numerically controlled machine tool.

Further, in order to create a machining program for machining, an interactive numerical control device in which an interactive program creating function is added to a numerical controller or an automatic programming device for easily creating a complicated machining program Etc. are widely used.

Of course, in order to use these numerical control devices, it is necessary to precisely define machine coordinates, machine origins, program coordinates, machining origins, etc., and create a rigorous machining program. When machining a large number of workpieces, these interactive numerical control devices and automatic programming devices can be used.

On the other hand, in a part of machining for producing a prototype or a mold, a general milling machine or a general-purpose milling machine that does not require machining program creation because it takes less time for setup such as attachment / detachment of workpieces and attachment of tools. I am trying to use a lathe. The processing in that case is performed solely by the operator's judgment.

However, the number of operators who can use these general-purpose machine tools is decreasing. Also,
Straight line machining is not a problem, but diagonal straight line machining, arc machining, etc. are difficult to machine with these general-purpose machine tools.

On the contrary, when using a general numerically controlled machine tool, it is necessary to accurately define machine coordinates, machine origins, program coordinates, machining origins, etc., which is not impossible, but only for one workpiece. It takes too much programming to process a part.

In order to solve such a problem, the applicant of the present invention has proposed a numerical control device capable of performing simple machining of a prototype or the like by using a general-purpose machine tool in Japanese Patent Application No. 4-23183.
I am applying for No. 6.

[0009]

In this numerical controller, a specified shape is generated based on the information input according to the guidance information, and during machining, a manual pulse generator or the like is operated to move the tool along the specified shape. I try to send it. However, this designated shape is only a part of the entire machined shape such as a straight line portion or a corner portion. For this reason, when it is attempted to process the entire machined shape, only that part can be machined, and continuous machining cannot be carried out over the entire machined shape.

Further, when a plurality of works are to be machined into the same shape, the entire machined shape is not recognized, so that only one machine can be machined at a time.

The present invention has been made in view of the above points, and when a workpiece is machined along a specified shape by operating a manual pulse generator or the like, continuous machining is performed over the entire machined shape. It is an object to provide a numerical control method capable of achieving the above.

[0012]

In order to solve the above-mentioned problems, the present invention uses a numerical control system for controlling a machine tool having at least two axes to specify a designated shape based on information interactively input according to guidance information. To move the tool to the end point position of the specified shape, turn on the teaching button, store the end point position and shape type, and process the generation of the specified shape to the storage of the end point position and shape type A numerical control method is provided which is characterized in that the final processed shape is obtained by performing the whole operation.

[0013]

First, the designated shape is generated based on the information interactively input by the operator in accordance with the guidance information. Next, when you move the tool to the end position of the specified shape and turn on the teaching button, the tool end position at that time,
Also, the shape type serving as the machining path is stored. The final processed shape is obtained by repeatedly performing the process from generation of the designated shape to storage of the end point position and shape type over the entire processed shape, and the final processed shape is stored as the processing path.

Therefore, if the operator operates the manual pulse generator or the like, the tool is continuously fed along the final machining shape. That is, continuous processing can be performed over the entire processed shape.

Further, since the final processed shape is stored, the same shape can be processed on a plurality of works.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, a machining shape generation procedure according to the numerical control method of the present invention will be described with reference to FIGS.

FIG. 2 is a guidance screen for generating a machining shape. When the operator selects oblique straight line machining from the machining guidance menu screen displayed in advance, this guidance screen 160 is displayed. The guidance screen 160 is displayed on the display device 1 provided in the numerical control device.
6 (FIG. 4). In addition to the diagonal straight line machining, the machining guidance menu screen displays arc machining, full circle machining, corner R machining, corner C machining, plane machining, pocket machining and the like. The operator selects a menu indicating a desired shape (here, an oblique straight line shape) from the processing guidance menu screen.

In the upper left part of the guidance screen 160, there is a current position display field 51 for displaying the current position of the tool, and in the upper right part of the screen is a tool status display field 52 for displaying the current status of the tool. A data input screen 50 for inputting a designated shape is displayed at the bottom of the screen. The current position display field 51 is provided with an X coordinate field, a Y coordinate field, and a Z coordinate field as the current position of the tool. Further, the tool state display field 52 is provided with a distance display field for displaying the distance (D) between the tool and the designated shape and a tool diameter display field (φ) for displaying the tool diameter (φ).

On the right side of the data input screen 50, a diagonal straight line diagram 53 having a designated shape is displayed. The diagonal straight line is
Start point (X1, Y1), end point (X2, Y2), and angle A
Is determined by the value of.

Therefore, on the left side of the data input screen 50, a start point input field 55, an end point input field 56, and an angle input field 57.
Is provided. In addition to these data, a tool diameter (φ) input field 58 and a soft key menu field 59 are provided. In the soft key menu section 59, by pressing the corresponding function key on the keyboard 17 (FIG. 4), each menu mode is entered and the screen contents are switched.

When this guidance screen 160 is displayed, the operator first selects the [TC start] mode in the soft key menu field 59 to enter the teaching mode for generating the machining shape. At this time, in the uppermost row of the data input screen 50, "teaching" is displayed together with "diagonal straight line machining". Further, the [TC start] in the soft key menu column 59 is switched to the display of [TC end].

On the guidance screen 160 as described above, the operator inputs data into each data input field to generate a designated shape of an oblique straight line. Next, the tool is moved to the end point position of the designated shape by operating the manual pulse generator 41 or the like. The movement of this tool is performed along a specified shape. When the teaching button 47 (FIG. 4) provided on the machine operation panel 40 is turned on when the tool reaches the end point position, the tool end point position at that time and the shape type serving as the machining path are stored.

Next, if the shape following the diagonal straight line in the entire machining shape is, for example, a corner R shape, select the corner R shape menu from the machining guidance menu screen and follow the same procedure as the corner R shape. The specified shape is generated, and the end point position and shape type are registered by teaching. In that case, since the end point of the previous designated shape becomes the start point of the new designated shape, the designated shapes of the partial portions are combined and continuous machining paths are generated.

This teaching operation is performed over the entire machining shape, and the operator finally selects the [TC end] mode in the soft key menu field 59 to generate the final machining shape, and the information is used as an NC command statement. Remembered. If it is desired to confirm the machining shape at that time before the final machining shape is generated, the [confirmation] mode provided in the soft key menu field 59 may be selected. In this [confirmation] mode, the machining shapes generated so far are displayed on the screen.

Next, the playback function when processing along the final processed shape will be described. FIG. 3 is an explanatory diagram of a playback function when processing is performed along the final processed shape. Here, the playback function refers to a function of performing processing along the final processed shape generated by the teaching function.

When the operator presses the playback button 46 (FIG. 5) provided on the machine operation panel 40, the playback screen 160a is displayed. This playback screen 16
At the center of 0a, the final processed shape 53a generated by the teaching function is displayed. When the operator presses the manual pulse generator 41 or the jog feed button 42 (FIG. 4), the tool executes the guidance machining along the final machining shape 53a.

When this guidance processing is automatically performed, the feed speed F input field 60 on the playback screen 160a
Enter the feed rate in advance. As a result, the feed rate during automatic operation is set. In this state, the operator has a cycle start button 45 (FIG. 5) provided on the machine operation panel 40.
When is pressed, the tool automatically moves along the final machining shape 53a in response to the ON signal, and guidance machining is performed.

This playback function is executed each time the operator presses the playback button 46. Therefore,
It is possible to process the same shape on a plurality of works.
As described above, in the present embodiment, the designated shape of each part is combined by the teaching function to generate the final processed shape, and the playback function enables the processing along the final processed shape. That is, it becomes possible to perform continuous processing over the entire processed shape. Further, since the final processed shape is stored, it becomes possible to process the same shape on a plurality of works.

FIG. 1 is a diagram showing a processing procedure of the present invention.
In the figure, the numerical value following S indicates a step number. [S1] First, a processing guidance menu is selected. [S2] [Start teaching] in the soft key menu section
Select to enter the teaching mode. [S3] Input a designated shape in accordance with the guidance screen. [S4] The tool is moved by operating the manual pulse generator or the like. [S5] The tool is set to the end position of the specified shape, and the teaching button is turned on. [S6] The tool position and the shape type as the machining path are stored according to the ON signal of the teaching button. [S7] It is determined whether teaching is completed. If completed, the process proceeds to the next step S8, and if not, the process returns to step S3. [S8] Softkey Menu column [End Teaching]
By selecting, the final machining shape is stored as an NC command statement.

FIG. 4 is a block diagram showing the hardware configuration of the numerical controller according to the present invention. Processor 11 is R
The entire numerical control device is controlled according to the system program stored in the OM 12. A program for processing and executing the present invention is also stored in the ROM 12 and executed by the processor 11. EPROM or EEPROM is used for the ROM 12. RAM13 has SRA
M or the like is used to store temporary data such as input / output signals. For the non-volatile memory 14, a CMOS backed up by a battery (not shown) is used. The nonvolatile memory 14 also stores various data such as parameters and machining programs that should be retained even after the power is turned off.

The graphic control circuit 15 converts the guidance information, the input point cloud data, etc. into a displayable signal and gives it to the display device 16. A CRT or a liquid crystal display device is used as the display device 16. Axis control circuit 18 (3
(For axis) receives the movement command of the axis including the interpolation pulse signal CP from the processor 11, and outputs the movement command for the axis to the servo amplifier 19 (for three axes). The servo amplifier 19 receives this movement command and drives a servo motor (not shown) of the machine tool 20. In addition to the servomotor, the machine tool 20 includes a machine operation panel 40 that is operated to issue a movement command, the details of which will be described later. These components are coupled to each other by a bus 30.

A PMC (Programmable Machine Controller) 22 receives a T function signal (tool selection command) or the like via the bus 30 when executing a machining program. Then, this signal is processed by the sequence program, a signal is output as an operation command, and the machine tool 20 is controlled.
Further, the interactive numerical control device receives a status signal from the machine tool 20, performs a sequence process, and transfers a necessary input signal to the processor 11 via the bus 30.

A software key 23 whose function is changed by a system program or the like is further connected to the bus 30. This software key 23 is used together with the display device 16 and the keyboard 17 in the CRT / MDI.
It is provided on the panel 25.

FIG. 5 is a view showing an example of a machine operation panel provided in the machine tool. In the machine operation panel 40 shown in the figure, a manual pulse generator 41, a selection switch 41b, a jog feed button 42, a setting switch 42a, a direction change switch 43,
An operation changeover switch 44, a cycle start button 45, a playback button 46, and a teaching button 47 are provided.

When the handle 41a is rotated to the left or right, the manual pulse generator 41 generates a pulse signal according to the rotation. This pulse signal is composed of a two-phase pulse for discriminating the rotation direction, and is transmitted via the bus 30 to the processor 1
1 to move the tool.

The selection switch 41b is the manual pulse generator 4
Which direction the pulse signal generated in 1 is the pulse signal in the X-axis direction (X), the Y-axis direction (Y), the Z-axis direction (Z), and the direction (G) corresponding to the machining shape path. Is a switch for selecting. In addition, the manual pulse generator 4
When operating 1 to move the tool along the final machining shape, the selection switch 41b is set to "G".

The jog feed button 42 has "+ X", "-"
"+ G", "+ Y", "-Y", "+ Z", and "-Z" axis feed buttons in the plus and minus directions and "+ G"
Eight buttons in total, which are plus and minus feed buttons, are provided corresponding to the paths in the point group data of "J" and "-GJ". When moving the tool along the final machining shape by operating the jog feed button 42, press "+ G
The "J" feed button is used. The ON signal when the jog feed button 42 is pressed is sent to the processor 11 via the PMC 22 and the bus 30.

The setting switch 42a is a jog feed button 42.
The number of pulses generated within a certain time when the operator presses is set, and the setting signal SS is sent to the processor 11 via the PMC 22 and the bus 30 as with the ON signal of the jog feed button 42.

The direction changeover switch 43 is the selection switch 4
When "G" is selected in 1b and the manual pulse generator 41 is operated, the tool is caused to move in parallel along a designated shape created in advance according to guidance information, or to move vertically to the designated shape. This is a switch for selecting and switching one of the movements. When the direction change switch 43 is set to the H side, the tool moves in parallel, and when it is set to the V side, the tool moves vertically.

The operation changeover switch 44 is a switch for selecting and switching between manual movement and automatic movement of the tool according to the final machining shape. When this operation changeover switch 44 is set to the M side, the tool is manually moved and A
When set to the u side, the tool automatically moves according to the feed speed command F.

The cycle start button 45 is a switch for activating the automatic feed when the operation changeover switch 44 is switched to the Au side. That is, when the cycle start button 45 is pressed, the tool movement according to the final machining shape is automatically performed.

The playback button 46 is a button for executing the playback function according to the present invention. When the playback button 46 is pressed, the final processed shape is displayed on the playback screen as described above.

The teaching button 47 is a button for executing the teaching function according to the present invention. When the teaching button 47 is pressed, the tool position at that time is stored and the designated shapes are combined with each other, as described above.

As described above, in the present embodiment, the designated shape of each part is combined by the teaching function to generate the final processed shape, and the playback function performs the processing according to the final processed shape. Therefore, continuous processing can be performed over the entire processed shape. Further, since the final processed shape is stored, it becomes possible to process the same shape on a plurality of works.

[0045]

As described above, according to the present invention, first,
The specified shape is generated based on the information interactively input by the operator according to the guidance information, and then the specified shape of the partial parts is combined by the teaching function to generate the final processed shape, and the final shape is reproduced by the playback function. It is configured to perform processing according to the processing shape of.

Therefore, if the operator operates the manual pulse generator or the like, the tool is continuously fed along the final machining shape. That is, continuous processing can be performed over the entire processed shape.

Further, since the final processed shape is stored, it becomes possible to process the same shape on a plurality of works.

[Brief description of drawings]

FIG. 1 is a diagram showing a processing procedure of the present invention.

FIG. 2 is a guidance screen for generating a processed shape.

FIG. 3 is an explanatory diagram of a playback function when processing along a final processed shape.

FIG. 4 is a block diagram showing a hardware configuration of a numerical controller according to the present invention.

FIG. 5 is a diagram showing an example of a machine operation panel.

[Explanation of symbols]

 11 processor 12 ROM 13 RAM 14 nonvolatile memory 15 graphic control circuit 16 display device 17 keyboard 18 axis control circuit 19 servo amplifier 20 machine tool 40 machine operation panel 41 manual pulse generator 41b selection switch 42 jog feed button 42a setting switch 43 direction Changeover switch 44 Operation changeover switch 45 Cycle start button 46 Playback button 47 Teaching button 50 Data input screen 53 Specified shape (diagonal linear view) 53a Final machining shape 59 Softkey menu field

Claims (2)

[Claims] 1. A numerical control system for controlling a machine tool having at least two axes, wherein a designated shape is generated based on information interactively input according to guidance information, and a tool is moved to an end position of the designated shape. And turning on the teaching button to store the end point position and shape type, and obtaining the final processed shape by performing the entire process from the generation of the designated shape to the storage of the end point position and shape type. Numerical control method. 2. The feeding of the tool when machining along the final machining shape is performed by a manual pulse generator, a jog feed button,
Alternatively, the numerical control method according to claim 1, which is performed by a pulse signal according to a set feed speed command.