JPH0416307B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a machining status monitoring device that displays machining progress status in a numerically controlled machine tool. Numerical control machine tools can machine multiple parts of a workpiece,
It is possible to perform machining according to a predetermined machining order based on the machining data corresponding to each machining location. For a workpiece having multiple machining locations, each machining location is selected and automatically machined accordingly. For this reason, it is essential for workers who operate numerically controlled machine tools to understand the progress of machining.

By the way, as a method of displaying the machining progress status in a conventional numerically controlled machine tool, there is a method of displaying a control sequence number of a numerically controlled program. However, with this method, even if it is known which machining cycle is being executed, it is difficult to know which machining locations are being machined, which machining locations are being machined, and which machining locations are not being machined. It is unknown whether any remain. In order to further improve this drawback, it has been considered to display the number of the processing location currently being processed. However, even with this method,
There was no overall display of the parts that had already been processed and the parts that would be processed in the future. Conventional numerically controlled machine tools have the above-mentioned drawbacks.

Therefore, since the machining progress status cannot be grasped, the operator cannot prepare for the next workpiece, reducing production efficiency. Particularly when machining is performed sequentially in a predetermined order starting from an arbitrary machining location, it is important to display information such as the already machined location, currently machined location, unprocessed location, etc. in relation to the display of the entire processing location to increase production efficiency. The present inventors have discovered that it is necessary to increase the

Therefore, the present invention provides not only a single piece of information corresponding to the machining location that is currently being machined, but also information on not only the current machining location, but also the already-machined and unmachined locations in relation to the entire machining location. The purpose of this is to improve the work efficiency of workers and production efficiency by displaying the information in an organically combined manner.

That is, the present invention provides a numerical control device that outputs a command signal for machining a workpiece having a plurality of machining locations in a predetermined order based on numerical control data corresponding to each machining location; A machining status monitoring device comprising a display section that inputs various signals from the device and displays the machining status of the workpiece according to the signals, the display section displaying the machining status of the workpiece based on the numerical control data. a display coordinate data creation means for creating display coordinate data for displaying each machining location of a workpiece; a display coordinate data storage area for storing display coordinate data created by the display coordinate data creation means; and a display coordinate data storage area for storing the display coordinate data created by the display coordinate data creation means; a machining status storage area for storing the machining status of the machining status; an initial status setting means for initially setting the machining status of each machining location stored in the machining status storage area to an unprocessed state; and machining processing for each of the machining locations is started. rewrites the data of each machining location stored in the machining status storage area from an unprocessed state to machining, and when the machining of the machining location is completed, rewrites the data from the machining state to processed data. a screen control means for displaying the machining status of the workpiece in an identifiable manner on a screen based on the machining status of each machining location stored in the machining status storage area and the display coordinate data of the display data storage unit;
It is characterized by consisting of.

Here, the workpiece having a plurality of machining locations may be, for example, a cylindrical object having multiple diameters, or a workpiece in which holes are to be drilled at a plurality of locations. Selecting the machining location and tool, or the machining speed and feed rate of the tool,
This is performed based on numerical control data inputted into the numerical control device in advance. This numerical control data includes data specified for each processing location. The numerically controlled machine tool has a function of performing machining processing sequentially from specific positions programmed in advance. This machining status monitoring device is directly connected to the numerical control device that is the command unit of such a numerically controlled machine tool, and receives display signals from the numerical control device.
This is a device that displays the processing status according to the signal. That is, the numerical control device sends out a signal indicating all the machining locations based on data input in advance at the time when the workpiece is supported on the machining table and the machining process is started. Also, when a particular machining location starts to be machined, a machining start signal is output.
Furthermore, when the machining of this machining location is completed, a machining completion signal is output. It has a function of determining an unprocessed part and outputting an unprocessed part display signal to display the unprocessed part. The present machining status monitoring device inputs these signals and firstly displays all the machining locations according to these signals. For example, a video showing the processed shape is displayed. Second, in response to the unprocessed area display signal, the corresponding processed area indicator section is displayed as an unprocessed area. Third, in response to a machining start signal indicating a machining location where machining has started, an indicator portion corresponding to the machining start location is displayed as a machining start display. Fourth, in response to the machining end signal, the corresponding machining location indicator section is set to indicate the machining end. The device of the present invention is
This is a processing status monitoring device that has such functions.
The display section of the machining status monitoring device may be, for example, a CRT display tube controlled by software using a numerical control device, as shown in the embodiment. In addition, it is also possible to simply display the above information using an indicator light such as a light emitting diode.

Hereinafter, the present invention will be specifically explained based on examples.

FIG. 1 is an overall configuration diagram of a numerically controlled machine tool equipped with a machining status monitoring device according to an embodiment of the present invention. A numerically controlled machine tool mainly includes an operation panel 10, a numerical control device 20 that outputs each numerical signal, a drive unit 30 that receives the signals and drives the numerically controlled machine tool, and a driving force from the drive device. and a machine tool section 40 that receives the workpiece and processes the workpiece. The operation panel 10 is a numerical control device 20
It has a keyboard 18 for providing various operation signals. It also consists of a CRT drive device 12 which drives a CRT display tube 14 in response to signals from a numerical control device 20, and a CRT display tube 14 driven by the drive device.

On the other hand, the numerical control device 20 is an interface between a central processing unit (CPU) 22 having various control and calculation functions, a storage device 24 that stores predetermined control programs and predetermined control data, and various input/output devices. It consists of an input/output interface 26 that takes the interface. Furthermore, a pulse generation circuit 31 that provides drive pulses to drivers 32 and 34 for operating the machine tool section 40 is connected to the central processing unit 22 via an input/output interface. The drive unit 30 includes a CPU 2
a pulse generating circuit 3 that generates a command signal to operate the drivers 32 and 34 in response to a signal from the pulse generating circuit 3;
1. A driver 32 for receiving drive pulses from the pulse generation circuit 28 to drive a tool feed drive servo motor 36, and a table feed servo motor 38 for controlling the feed of the table 46 supporting the workpiece. It consists of a driver 34 for driving. Further, the machine tool section 40 has a bed 41 that supports a tool and a workpiece support on a flat surface, and a guide surface 4 provided on the bed 41.
2, a tool support stand 43 is provided. The tool support base 43 engages with a tool support base feed shaft 44 and receives the rotational force of the servo motor 36 to control the tool feed. A tool 45 is pivotally supported on the tool support base 43 . On the other hand, the workpiece 60 is centrally supported by a headstock 50 and a tailstock 51, and rotated by a spindle drive motor 52. The headstock 50 and the tailstock 51 are arranged on a table 46, and the table 46 engages with a guide surface 48 that guides the table. The table 46 engages with the table feed shaft 49 and the table feed shaft 49
is coupled to the rotating shaft of the table feeding servo motor 38 to control table feeding.

FIG. 2 illustrates the outer diameter of a workpiece having a multi-step shape and having a plurality of processing locations. Symbols P1 to P4 are numbers each indicating a processed location. D1 to D4 represent the machining outer diameter at each machining location. L1 to L4 represent the processing width at each processing location.

The numerical control data necessary for machining such a workpiece is illustrated in FIG. PDA is machining shape data regarding all machining locations on the workpiece and their machining dimensions. The next data block NCDA is
Contains basic numerical data for the numerical control device to output command signals. That is, data indicating the machining location, data indicating the table indexing position, data indicating the feed speed of the tool, etc. are input. These constitute data blocks corresponding to each processing location. The next data block, GDDA, is a data area into which display coordinate data necessary to display the machining location as the outline of the workpiece and to display the machining progress status is input. The next data block, MPIT, has an area corresponding to each machining location, into which information indicating unprocessed, machining start, and machining completed is input. Based on these data, the machining progress status is displayed on the CRT display tube 14.

Next, FIG. 4 shows a flowchart of a program for displaying the processing progress status. Step 1
In step 00, data GDD for displaying the outer shape of the machined part on the CRT is created in GDDA based on the outer diameter data PDA of the workpiece. Next, in step 102, all processed parts are designated to be displayed as unprocessed in the initial setting of the MPIT table, that is, in the MPIT area of the data table. Next step 1
In step 04, the screen is displayed based on the MPIT and GDDA data. As a result, the CRT display tube will display something like the one shown in Figure 6a. The CRT display tube displays an external shape with multiple diameters, and all processed areas are displayed in green to indicate that they are unprocessed. Next, the process moves to 108, and a table indexing routine for indexing the machining location of the workpiece is activated. This moves the workpiece to the tool setting location. In the next step 110, the MPIT data area corresponding to the identified machining location is set as a machining start code. Then, in the next step 112, as in the previous step 104, the screen is displayed by referring to the MPIT data area. in this state
The CRT screen is shown in Figure 6b. In addition to displaying the tool at the location to be machined, the location (P
Only 2) is displayed in red. Others P1, P3,
P4 is displayed in green, which is an unprocessed image. In the next step 114, a routine for grinding is executed based on each numerical control data. When the machining of the machining location is completed, the process moves to step 116, and the area corresponding to the machining location in the MPIT table is rewritten with a machining completion code. After this, in step 118, screen display is performed. After this is done, the CRT screen is displayed as shown in FIG. 6c.
The indicator portion of the processed location P2 is displayed in yellow indicating the processed state. Next, the process moves to step 120, where it is determined whether the machining is completed. If all machining locations have not been completed, the process returns to step 108, the table for the next machining location is determined, and the above cycle is repeated in the same manner.

Next, the flowchart shown in FIG. 5 of the screen display routine will be explained. In step 201, a counter DPC for searching the MPIT machining progress display table is initialized. Next step 2
02, 203, and 204, the machining status of the MPIT machining location is interpreted, and the specified color display code is specified according to each status. Next, in step 208, data for displaying the outer diameter line of the machining location is selected and specified from GDDA. In the next step 209, steps 205 to 207 and 2
Based on the data specified in step 08, a program that actually operates the CRT drive device is executed.

In this way, the machining status of one machining location is displayed, and in step 210 it is determined whether all machining locations have been displayed. If not, the process returns to step 202 and repeats the above routine.

Through the above processing, it is possible to display machining progress information according to the machining progress status.

Furthermore, if the processing order is displayed on the CRT display tube,
Furthermore, the effects of the present invention are increased.

In the above embodiment, the outer diameter is displayed using a CRT display tube, but as shown in FIG. 7, information similar to the processing status of the first embodiment can be displayed using a light emitting diode display panel You can also do that. The first row of lamps displays the locations to be processed, and the illuminated locations indicate the locations to be processed. The second row of lamps displays the machining progress status; a light off indicates that the work has not been done, a light on indicates that the work has been completed, and a blinking light indicates that the work is currently in progress.

In summary, the present invention is configured to display all machining locations, unmachined locations, machining start locations, and machining progress statuses of already machined locations in accordance with the machining status of a numerically controlled machine tool. be. Therefore, even when multiple machining locations are being machined randomly, the operator of the numerically controlled machine tool can easily decipher the current machining location, the already machined location, and the unmachined location, so the machining progress status can be viewed as a whole. It can be understood from the relationship. Therefore, the next workpiece or tool can be prepared in a timely manner, and production efficiency can be improved.

[Brief explanation of drawings]

FIG. 1 shows an overall configuration diagram of a machining status monitoring device and a numerically controlled machine tool equipped with the same according to an embodiment of the present invention. FIG. 2 is a configuration diagram showing the machined shape of a workpiece in one embodiment. FIG. 3 shows the structure of numerical control data and graphic display data input to the numerical control device in the same embodiment.
FIG. 4 shows the flow of a program processed by the numerical control device. FIG. 5 shows details of the screen display processing routine. FIGS. 6a, 6b, and 6c each show an example of the display screen of a CRT display tube that changes as the machining progresses. FIG. 7 is a configuration diagram of a display section of a processing status monitoring device according to another embodiment. 10...operation panel, 12...CRT drive device, 14...
CRT, 20...Numerical control device, 40...Machine tool department.

Claims (1)

[Claims] 1. A numerical control device that outputs command signals for machining a workpiece having multiple machining locations in a predetermined order based on numerical control data corresponding to each machining location; and a display unit that inputs a signal and displays the machining status of the workpiece according to the signal, and the display unit displays each of the workpieces based on the numerical control data. Display coordinate data creation means for creating display coordinate data for displaying the machining location;
a display coordinate data storage area for storing display coordinate data created by the display coordinate data creation means;
a machining status storage area for storing the machining status of the machining location; an initial status setting means for initializing the machining status of each machining location stored in the machining status storage area to an unprocessed state; When processing is started, the data of each machining location stored in the machining status storage area is rewritten from the unprocessed state to the machining state, and when the machining of the machining location is completed, the data of the machining location is changed from the machining state to the processed state. a screen for displaying the machining status of the workpiece in an identifiable manner based on the data rewriting means and the machining status of each machining location stored in the machining status storage area and the display coordinate data of the display data storage area; A machining status monitoring device for a numerically controlled machine tool comprising a control means.