JPS6314204A - Numerical controller - Google Patents

Abstract

PURPOSE:To efficiently perform numerical control over plural machines and to obtain advantages in cost by structuring plural control processing systems on the whole device, and controlling the respective systems independently by control programs. CONSTITUTION:When three uniaxial machines are controlled independently of one another, a system control means in a data area 20D of a storage part 20 relates systematically a signal input/output part 16A, a program area 20A, and a driving part 22, a signal input/output part 16B, a data area 20B, and a driving part 24, and further a signal input/output part 16C, a program area 20C, and a driving part 26 to one another. Servomotors 28, 30, and 32 are controlled independently of one another based on respective control data inputted from the input/output parts 16A-16C and control programs stored in the areas 20A-20C. At this time, a control part 12 performs what is called task control. In this case, the whole device functions as three independent systems of numerical controllers.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a numerical control device, and particularly to a numerical control device that controls a plurality of controlled axes.

[Conventional technology] Numerical control, which commands the position of a tool relative to a workpiece using numerical information, has advantages such as improved productivity, labor savings, and thorough management, so it is applied to various machine tools and is widely used. ing.

FIG. 2 shows an example of a conventional numerical control device. In this figure, the control unit (50) includes a central processing unit (hereinafter referred to as rcPUJ) (52),
Also, a data person output section (54) and a signal person output section (54) are provided.
6) are connected to each other.

The control unit (50) further includes a calculation unit (58) and a storage unit (
60) and a drive section (62) are connected to each other, and a servo motor group (64) is connected to the drive section (62).

Of these, the data person output unit (54) is for inputting and outputting processed data with an external data person output device (not shown), and the signal person output unit (56) is for starting,
This is for human output of control data such as stopping.

Next, the storage section (60) is provided with a data area (60)A and a program area (80)B.

The processed data input from the data output unit (54) is
It is stored in the data area (60) A, and the signal input/output section (5
The control data input from 6) is stored in the program area (
60) It is stored in B.

Next, the calculation unit (58) performs calculations necessary for controlling the servo motor u (64). For example, when a drive command is given at a vector speed, a predetermined calculation is performed from the decomposition speed in the coordinate axis direction. Arithmetic processing such as interpolation to determine the distance traveled in time is performed.

Next, the drive unit (62) has a servo motor group (64) that
Servo motor (64) A, servo motor (84) B
, and servo motor (64) C, three drive circuits (
It is composed of 62) A, (62) B, and (62) C.

Note that the servo motor group (64) actually corresponds to the servo motors of the three-axis driving portion of machine tools such as lathes and drilling machines.

Next, the operation of the above device will be explained. Data necessary for performing processing control is input from an external computer through a data output section (54) and a signal output section (56). These data are stored in the storage unit (
60) data area (60)A, program area (
80) Each is stored in B.

Next, the control unit (50) controls the program area storage unit (6
0) Based on the program and data stored in B, the data area storage unit (60) performs calculations such as the interpolation described above from the data stored in A, and then the drive unit (62) Issues necessary drive commands. As a result, the servo motor group (64) is driven, and the required machining is executed according to the input data.

As described above, the servo motor (54) A, the servo motor (64) B, and the servo motor (64) C of the servo motor group (64) are not driven independently, but are driven as a whole. Driven.

[Problems to be Solved by the Invention] Incidentally, in the conventional numerical control device as described above, the entire operation is performed by a control program stored in the program area (60) B of the storage section (60), and the drive Servo motor (64)A connected to section (62), servo motor (6
4) B and servo motor (δ4) C cannot be driven independently.

For example, servo motor (δ4) A is used to rotate a drill on a drilling machine, servo motor (54) B, servo motor (
64) It is not possible to use C in a lathe.

Therefore, it is necessary to provide a numerical control device as shown in FIG. 2 for each machine. Therefore, when numerically controlling a large number of machines, a large amount of equipment is required, which is disadvantageous in terms of cost.

The present invention has been made in view of the above points, and an object thereof is to provide a numerical control device that can efficiently numerically control a plurality of machines and is advantageous in terms of cost. .

[Means for Solving the Problems] The present invention configures the information input/output unit and the drive unit into a plurality of independently operable systems, and also allows these systems to be independently operated by a system control means. The present invention is characterized in that it is divided into a plurality of arbitrary groups corresponding to a plurality of control programs that can be executed by the user, and that each group is controlled independently.

[Operation] According to the present invention, the entire apparatus constructs a plurality of control processing systems, and each system performs control operations independently according to an independent control program.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a numerical control device according to the invention. In this figure, a control unit (12) including a CPU (10) first includes a data output unit (14).
) are connected. This data person output section (14) is
It corresponds to the data output section (54) in FIG. 2 and exchanges processed data with an external data input/output device (not shown).

Next, a signal input/output device (16) is connected to the control section (12). This signal output device (6) has a configuration of signal output sections (18) A, (16) B, and (16) C, each of which can independently output control data. has been done. That is, the signal person output section (16) A,
(16) B and (16) C each have the same function as the signal person output section (56) in FIG. 2.

Next, a calculation section (18) is connected to the control section (12). This calculation unit (18) performs interpolation and other calculations as described above.

Next, a storage unit (2o) is connected to the control unit (12). This storage section (20) has a program area (20).
It has 0) A, (20) B, and (20) C. These program areas (20) A, (
20) Control programs that can be operated independently are stored in B, (2o) and cD. That is, the programs stored in program areas (20)A, (20)B, and (20)C each have the same functions as the programs stored in program area (60)B in FIG. However, each can be executed independently.

Furthermore, the storage section (20) is provided with a data area (20)D. This data area (20) D, like the data area (60) A in FIG. 2, is for storing processed data, but in addition, system control means is programmed and stored therein.

Next, the control section (12) includes drive sections (22) and (24).
, (26) are connected to each other. These drive parts (2
2), (24), and (26) can each operate independently, and each has the same function as the drive unit (62) in FIG. However, only the negative axis can be controlled.

Next, servo motors (28), (30), and (32) are connected to the drive units (22), (24), and (26), respectively.

These servo motors (28), (30), and (32) are not necessarily from the same machine, but may be from two or more machines, and can operate independently.

Next, the system control means stored in the data area (20) D mentioned above will be explained. This means is executed by the control unit (12).

As shown in FIG. 3, first, data input from the data output unit (14) and the signal input/output device (16),
Referring to the control programs stored in program areas (20)A to 20)C, it is determined which control program is to be operated (step SA
, SB, SC). Next, the program to run,
The correspondence between signal output unit (16) A or 16)C and 9 is determined (see step SD) where control data used therein is outputted. Furthermore, the correspondence between the program and the drive unit (22) to 26) to be operated is determined (see step SE).

In this way, the system control means controls the signal input/output section (16)A or 1B) according to the content of the required control operation.
C. It has the function of organizing and grouping the program areas (20)A to 20)C1 drive units (22) to 26).

Next, the overall operation of the above embodiment will be explained using various cases as examples.

First, while referring to Fig. 4, -axis machine (34), (
36) and (38) are each controlled independently. In addition, the signal person output section (1[i) A outputs the control data D (34) of the machine (34), and the signal person output section (16) B outputs the control data D (36) of the machine (36). ) is output, and the signal output section (16)C
Assume that the control data D (38) of the machine (38) is output manually. And the program area (20)
A? / Ishiku 20) C, machine (34) or 38)
It is assumed that the following control programs are stored respectively.

In this case, the system control means of the data area (20) D systemizes the signal man output section (15) A, the program area (20) A, the drive section (22), etc., and controls the signal man output. Part (16) B, program area (20) B, and drive part (24) are systematized, and signal person output part (1δ) C, program area (20) C, and drive part (26) are systemized. Can be attached.

The servo motor (28) or 32) is connected to the signal person output section (15) A or 1! i) Control data input from C and program area (20) A or 2
0) Based on the control programs respectively stored in C,
Each is controlled independently. That is, starting operations, stopping operations, etc. are performed independently. At this time, the control unit (12)
In this case, so-called task control is performed.

As described above, in this example, the entire device functions as three independent numerical control devices.

Next, with reference to FIG. 5, a case will be described in which a machine (40) having two servo motors and a machine (42) having one servo motor are each independently controlled.

In FIG. 5, in the signal man output section (16) A,
It is assumed that the control data D (40) is human outputted to the control data D (40), and the signal person output section (16) C inputs and outputs the control data D (42) to the machine (42). 20) B has a machine (40
) is stored therein, and the program area (20)C stores a control program to be operated in the machine (42).

In this case, the system control means in the data area (20) D controls the signal input/output section (16) as shown in FIG.
A, program area (20) B, drive unit (22
) and (24) are systematized, and the signal person output section (1
6) C and the program area (20) C and the drive unit (26) are organized.

The machine (40) is controlled by a control program stored in the program area (20)B, and the machine (42) is
It is controlled by a control program stored in program area (20)C. Note that in the control of the machine (40), since two servo motors are involved, interpolation calculations are performed in the calculation section (18).

As described above, in this example, the entire system operates as two independent numerical control devices.

Next, with reference to FIG. 6, still another operational aspect of this embodiment will be described.

The figure shows an example in which the machine (44) has three servo motors. In this case, the signal person output section (16) where the human output of the control data D (44) is performed.
B, a program area (20) A in which a control program is stored, and drive units (22) to 26) are systematized. In this example, one system of control similar to that of the device shown in FIG. 2 is performed.

Note that the present invention is not limited to the above embodiments in any way. For example, in the above embodiment, up to three independent systems can be constructed, but two systems or more systems may be constructed.

[Effects of the Invention] As explained above, according to the present invention, various independent control systems are constructed using the system control means, so that a plurality of machines can be efficiently numerically controlled, and the cost can be reduced. It also has the effect of being advantageous.

[Brief explanation of drawings]

FIG. 1 is a circuit block diagram showing one embodiment of the present invention, and FIG.
The figure is a circuit block diagram showing a conventional numerical control device, FIG. 3 is an explanatory diagram explaining the functions of the system control means, and FIGS. 4 to 6 are explanatory diagrams showing the operation mode of the embodiment of FIG. 1. be. In the figure, (12) is a control unit, (16) is a signal input/output device, (18) is a calculation unit, (20) is a storage unit, (20) is a
A. (20) B, (20) C are program areas, (22). (24), (26) are drive parts, (28), (3
0) and (32) are servo motors. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Claims] (1) Based on the information input from the information input/output unit and the control program stored in the storage unit, the calculation unit performs the necessary calculations, and the control processing unit issues the necessary control commands to the drive unit to be controlled. In a numerical control device that performs The storage unit includes a plurality of independently executable control programs, and arbitrarily groups each system of the information input/output unit and the drive unit according to any one of the plurality of control programs. What is claimed is: 1. A numerical control device, comprising a system control means for grouping systems, wherein the control processing section independently controls each grouped system. (2) The numerical control device according to claim 1, wherein the calculation unit performs an interpolation calculation between control objects within a group.