JPS63138407A - Numerical controller - Google Patents

Abstract

PURPOSE:To improve the working factor of a numerical control NC device by dividing the data for control of NC machine tools into the integrated control data (automating function data) and individual working data (NC data) and therefore omitting the process of an abnormal working means to handle the subsequent normal working means with preference. CONSTITUTION:The NC control is carried out with transmission of an NC instruction and the working data are called out of a memory 20 in a prescribed sequence. Then a working instruction is given to an NC working machine 50 and the working processes are successively carried out. While the working process is coincident with 'drill lower hole processing', for example, and a drill is broken. In such a case, this abnormality is detected by an abnormality detecting means 60 and fetched by a control part 30 for reference to an integrated control data program 200. Here the program 200 omits the 'lower hole processing' and its inseparable 'tap processing' according to a conditional jump given at the time of abnormality. hereafter other processes are successively carried out. In such a way, the abnormal working processes are omitted to advance the normal processes. As a result, the working factor of an NC machine tool is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is applicable to numerical control devices, particularly DNC (Direct Nu
control) device.

[Conventional technology]

DNCljlE is a device that simultaneously controls multiple NC machine tools or NC machine tools with multiple processing means on a time-sharing basis.Originally, the DNC device was intended to save labor through automatic processing, so it is unmanned. It is preferable that it can be operated continuously for a long time.

There are two main methods for continuous long-term operation of conventional NC machine tools. First, as shown in FIGS. 4 and 5, machining data (NC data) preset in the memory 2 in the DNC device 1 is called up from the operation panel 4 via the control section 3 to control the NC machine tool. 5, and the other method is to set the machining order in advance using the operation panel 4, and continuously call each machining data during operation to perform continuous operation. However, productivity improvement,
From the standpoint of improving operating rates, it is necessary to operate as efficiently as possible. In addition, NG with an adaptive control function is used to enable efficient operation by adapting to the processing tool and the processed layer.
The system W (Japanese Patent Application Laid-Open No. 171242/1983) is known.

(Problem to be solved by the invention) Now, as a general problem with NC machine tools, when a machining problem such as a broken tool occurs during machining, it is necessary to temporarily stop the NC machine tool for replacement or repair. In other words, stopping an NC machine tool during continuous operation will affect the operating rate of the machine. CAM (Computer Aided Ma
If the introduction of a manufacturing (nufacturing) system is considered, it is not a good idea as it would cause new problems such as requiring major modifications to the existing system.

Therefore, an object of the present invention is to provide a DNC device that can improve the operating rate without requiring major system modification.

[Means for Solving the Problems] In order to solve the above problems, the present invention divides data for controlling an NC machine tool into integrated control data (automation function data) and individual machining data (NC data). By layering, the process of the abnormal machining means is omitted and the subsequent normal machining means is handled preferentially, thereby improving the operating rate.

That is, the present invention provides a numerical control device that performs machining control by time-divisionally outputting each machining command to a numerically controlled machine tool having a plurality of machining means, in which each machining means is controlled based on abnormality detection data of the machining means. a storage means for storing general control data for controlling the progress of processing and processing data for each processing means; The present invention is characterized by comprising a control means for outputting machining data corresponding to the machining means to the numerically controlled machine tool.

[Effect]

According to the above configuration of the present invention, data for controlling the NC machine tool is stored in the memory in the DNC device in a hierarchical structure of general control data and individual machining data, and the control means detects an abnormality. Since the processed processing means is stopped and the primary normal processing means is operated, the operation of the NC machine tool can be continued without stopping. In this case, the machining step corresponding to the abnormal machining means will be omitted, but no substantial problem will arise because the machining can be completed by supplementing the part later.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows an embodiment of a DNC device according to the present invention. A DNC device according to the present invention ff1lo (FIG. 1) and a conventional DN.
The feature point that differs from CVlWll (Fig. 4) is that memory 2
0 and the control function of the control unit 30.

In FIG. 1, the NC machine tool 50 includes each processing means (
For example, an abnormality detection means (for example, a vibration pickup, etc.) 60 is provided for detecting an abnormality in a drill, a cutting blade, etc.). This abnormality detection signal is taken into the DNC device 110 via the control section 3o. The data storage area of the memory 20 is roughly divided into two parts, one of which stores the general control data 20.
0 (FIG. 3), and the other stores specific processing data (NC data) individually corresponding to each processing means. The control unit 30 controls the transmission and reception of each data using the algorithm shown in FIG.

Next, the operation will be explained. In FIG. 2, at the start of control, it is determined whether or not it is an NC command (step 100), NG control is executed by sending an NC command (step 200), and then in a predetermined sequence. Processing data is recalled from memory 20 (step 1
02, 103), a machining command is given to the NC machine tool 50. below.

Similarly, the machining steps are sequentially advanced, and if all the machining means are normal, the one-condition jump 106 is passed and the series of machining is completed.

Next, the operation when there is an abnormality in the processing means will be explained. Now, suppose that the machining process is, for example, "drill pilot hole machining", then in the flow of Fig. 2, step 102 (
YES) → Step 103 → Step 100 (No)
-4 step 102 (No) - +Xr tube 104 (N
o) The flow is 4 steps 106 (YES)-4 steps 107. At this time, if the drill is broken, the abnormality is detected by the abnormality detection means 60 and taken into the control section 3o. The control unit 30 refers to the overall control data program 200 in the memory 20. At this time, the overall control data 200 is as shown in FIG.

In step 203, the process jumps to step 206 according to the conditional jump in case of abnormality, and ``preparatory hole machining'' and ``tap machining'' which is closely and inseparably related to that machining are omitted. Other machining is performed sequentially according to the algorithm shown in the figure.If there is no abnormality during the process, the process ends as described above, and if there is an abnormality, processing is performed according to the abnormality flow described above.

〔Effect of the invention〕

As described above, according to the present invention, only the abnormal machining process is omitted and the process proceeds to the normal process, so that the operating rate of the NC machine tool can be effectively improved. Furthermore, the present invention does not require major system modification and can be easily applied to existing equipment.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a flowchart showing the control algorithm of the control section, Fig. 3 is a flowchart showing the overall control data program, and Fig. 4 is an example of a conventional DNC device. The block diagram shown in FIG. 5 is a flowchart showing an example of conventional control. 10...DNC! ! Placement, 20...Memory, 30
...Control unit, 50...NC machine tool, 60.
...Anomaly detection means, 200...General control data. Agent Patent Attorney Tatsuyuki Unuma Figure 2

Claims (1)

[Claims] (1) In a numerical control device that controls machining by time-divisionally outputting each machining command to a numerically controlled machine tool having a plurality of machining means, the progress of each machining means is controlled based on abnormality detection data of the machining means. a storage means for storing general control data to be controlled and processing data for each processing means; and a storage means for storing processing data for each processing means; A numerical control device comprising: control means for outputting corresponding machining data to the numerically controlled machine tool.