JPS60193012A - Tool post synchronizing method for numerical controller - Google Patents

Abstract

PURPOSE:To attain the assured synchronization for block start of a specific processing program by setting newly the specific instruction codes for synchronization ON and OFF and programming an instruction code of synchronization ON or OFF at an area where the start synchronization is needed or not needed. CONSTITUTION:The program contents of a tape are read and stored in a buffer memory to be sent to a control circuit 6 via an instruction decoding circuit and a pre-calculating circuit for on-line control of a machine tool. The circuit 6 contains controllers 6A and 6B for the 1st and 2nd tool posts and is connected to a programmable controller serving as a sequencer. Thus both tool posts are controlled with synchronization secured with each other. In this case, a synchronizing control circuit 6C is used together with input terminals T1 and T2 to which block end detection signals are applied from both tool posts and input terminals T3 and T4 for synchronization ON and OFF commands respectively. Then the execution waiting control signals sent from output terminals T5 and T6 of both tool posts are delivered to controllers 6A and 6B to start the synchronizing control at a desired time point.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a complex multi-axis machine tool that simultaneously operates machine programs of a plurality of tool rests independently, by controlling the start of execution of a specific machining block within the machine program. The present invention relates to a method for synchronizing a tool post in a numerical control (NC) device, which can be performed at any location.

[Prior art]

First, an outline of a conventional NC device will be explained with reference to FIGS. 1 and 2.

FIG. 1 is a block diagram showing the configuration of the NC device, and the second
The figure is a block diagram for explaining a method of synchronizing two turrets in a conventional NC device.

In Fig. 1, 1 is a tape containing a computer program written in NC language, 2 is a reading circuit, 3 is a computer memory, 4 is an instruction decoding processing circuit, 5 is a pre-calculation circuit, 6 is a control circuit, and 7 is an axis. Movement amount output circuit, 8 is a pulse distribution circuit, 9
is a servo unit, 10 is a motor, 11 is a detector, 12
1 is a spindle rotation detector, 13 is a programmer controller (hereinafter referred to as PC 5), and 14 is a machine tool to be controlled.

The operation shown in FIG. 1 will be briefly explained.

The program contents of the tape 1 are read in the reading cycle 'N12, temporarily stored in the panzer memory 3, the commands of the program are decoded in the command decoding processing circuit 4, and the next pre-calculation circuit 5 performs necessary numerical calculations. Preprocessing is performed, and the resulting data is sent to the next control circuit 6, where online control is performed. That is, the axis movement #Ji of the machine tool 14 is given to the axis movement amount output circuit 1 by 1//lock of the program,
A pulse is output from the pulse distribution circuit 8, the servo unit 9 is operated, and the motor 10 is driven to move the shaft.

A detector 11 is attached to the motor 10 to detect the amount of displacement of the motor 1D, which is fed back to the servo unit 9 to drive the motor 1D by a predetermined amount. The spindle rotation detector 12 is attached to the spindle for the purpose of detecting the rotation speed of a rotating workpiece or a rotating tool, and feeds back the rotation speed of the spindle to the pulse distribution circuit 8 to adjust the rotation speed of the motor 10 to the spindle rotation. Synchronize with speed.

On the other hand, PCl3 is a sequencer that performs control other than shaft drive of the machine tool 14, for example, hydraulic control t, l: control of auxiliary functions such as tool exchange and spindle rotation, and the control circuit 6
The above-mentioned control is performed by exchanging signals with the controller.

In the conventional NC device, a synchronization method when the machine tool 14 is a lathe having two turrets will be explained with reference to FIG.

In Figure 2, IA and IB are the first and second
This is a tape for the Canadian knife program for the turret. 6 is a control circuit, which includes a controller 6A for the first tool rest.
and a second tool rest controller 6B. And each controller 6A, 6B and sequencer P
(:13 are connected to each other.

When you have two such turrets, if you do not operate the other turret after a certain process on one turret is completed, the turrets will collide with each other. They are made to operate together using the synchronization command inside. Therefore, the first. The controllers 6A and 6B of the turret of ft142 are independently Ml. An M command for synchronization such as this is output to PCl3. PCl3
is the M command amount.

is executed until it is input from both controllers 6A and 6B, and when both M commands Mlo arrive, control coolers 6A and 68ICM! +Ii instruction completion is output, thereby the 1st. The second double turret is controlled in synchronization.

In this way, the conventional method of synchronizing the tool post is to program an auxiliary function command such as the M command, and upon receiving that command, P(1
3 is in synchronous control. In this case, the auxiliary function command (
For example, M command) is independently set as the first command. The second turret controller 6 A I 6 B outputs the signal to the PCl3, and receives the completion signal from the PCl3, so the PCl3 has functions other than its original auxiliary function.

1st. tJ42 double turret M command amount. , and if they match, the completion must be notified to both controllers 6A and 6B, which increases the burden on the PCl3.

Furthermore, since there is no control between the controllers 6A and 6B, even if a completion signal is input from the PCI 3, there is a delay in the signal, making it difficult to achieve proper synchronization. In addition, in the Brographa, the original auxiliary function command for the lathe and the synchronization command for the two turrets use the same auxiliary rate (for example, the M command), but are distinguished by the numerical difference in the rate (Ml. and M, 1). Since they are separated, there are drawbacks such as the need to be careful not to cause programming mistakes and JP confusion.

[Summary of the invention] This invention was made to improve the above-mentioned drawbacks, and a special soundproof cord for synchronous ON and synchronous OFF was newly installed, and 1161
By programming a command code for sync ON or sync OFF in the location? , the NC device can read it and perform synchronization processing or not.

Examples of the present invention will be described below.

[Embodiments of the invention]

FIG. 3 is a block diagram showing an embodiment of the present invention.
is a synchronization control circuit, and an example of the detailed circuit is shown in Figure 4.

In this invention, synchronous ON commands that did not previously exist in the Canadian program, such as "G15" and synchronous OFF commands,
For example, "Gl 4 "t- is used.

In Figure 4, AND1 to ANDa are 7 games),
FF1 to FF are seven lip-flops indicating flags for waiting for execution, Tl t Tl is an input terminal to which a block completion detection signal from the 11th and 2nd blade anastomosis is applied, T3 is an input terminal to which a synchronization ON command G15 is applied, and T4 is sync OFF
Input terminal to which command G14 is applied, Tll.

T6 is the first. At the output terminal of the second turret, a control signal that executes when it is 10'' and waits when it is 1'' is used to control the first turret. It is output to the controller of the second tool rest.

Next, the operation shown in FIG. 4 will be explained.

Now, if a synchronization ON command 1G15'' is input to the input terminal T3, the flip-flop FF is set and its output terminal is set to 1'' to enter a state of waiting for synchronization processing. Here, if the block completion detection signal is input to the input terminal T1 of the first tool post, ANDl is established, and the second
Input terminal of the turret ■! There is no block completion detection signal in X, 1, so AND) does not hold,
As a result, the AND gate A N D s is established, and the flip-flop fF! and its output terminal Q′ik″
1". At this time, if the output of flip-flop FF is 0' and the second turret is being controlled, AND is established, flip-flop FF is set, and its output terminal Q is set. '1' to wait for control of the first tool rest. If the output of the flip-flop FF is ``I'' and waiting, AND6 is established, the flip-flop FF++ is reset, its output is set to 0'', and the second tool post is controlled.

The same applies to input terminals T and K.

Furthermore, if the synchronous OFF command "'014" is input to the input terminal T4, the flip-flop FF is reset,
Its output terminal Q is set to 0''.At this time, the AND gate A
NDX and AND gate A N D t are input terminals T,,
Even if the T, Ic clock completion detection signal is input, it is always not established and synchronization processing is not performed. In this way, 2
One of the two turrets can be controlled in synchronization with the other from the required point.

Although "Gl 5" and "G14" are used as the synchronization ON command and synchronization OFF command in the above embodiment, it goes without saying that other codes can be used.Also, the number of turrets is 2. It is also possible to do more than one.

〔Effect of the invention〕

As described in detail above, the present invention uses a synchronization ON command and a synchronization OFF command, and inserts the synchronization command into any of the independent machine programs that control a plurality of tool rests, and A sum synchronization control circuit is provided so that when the synchronization command is input to the synchronization control circuit, each addition program is synchronized and executed, so that when all block completion commands in each program are detected. After that, each turret can be driven according to the program, which has the advantage of being able to reliably synchronize the activation of the flocks of a particular cannibal program. Also, when there is no need to synchronize, you can turn off synchronization.
By programming the F command, each turret can be operated independently.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of an NC device, Fig. 2 is a block diagram illustrating a method for synchronizing two turrets in a conventional NC device, and Fig. 3 shows an embodiment of the present invention. The block diagram, FIG. 4, is a circuit diagram showing details of the synchronous controller in FIG. 3. In the figure, 1 is a tape, 2 is a reading circuit, 3 is a Banff 7 memory, 4 is an instruction decoding processing circuit, 5 is a pre-calculation circuit, 6 is a 1li
lJ control circuit, 6A, 6BGim1. mz tool post controller, 6C is a synchronous control circuit, 7 is an axis movement amount output circuit, 8 is a pulse distribution circuit, 9 is a servo unit, 10 is a motor, 11 is a detector, 12 is a spindle rotation detector, 13 is A programmer controller (PC) and 14 are machine tools. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Masuo Oiwa (2 others) Figure 2 Figure 3

Claims (1)

[Claims] In a numerical control device for a complex multi-axis machine tool that is equipped with a plurality of turrets and is controlled through a control circuit, each of the turrets is
A synchronization command is inserted into any of the independent Canadian program that performs li1#, a synchronization control circuit is provided in the control circuit, and when the synchronization command is input to the synchronized coit roll circuit, the synchronization of each program is performed. 1. A tool post dosing method in a numerical control device characterized by taking and executing the turret.