JP3129115B2 - Machine control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a machine tool such as a numerical control device, and more particularly to a device capable of operating a plurality of machines from a single operation panel.

[0002]

2. Description of the Related Art Conventionally, in a machine control device of this kind,
In some machines, a plurality of machines are connected to one operation panel, and a machine to be driven can be selected by operating a changeover switch on the operation panel. Such an apparatus configuration is as shown in FIG.
Reference numeral 4 is connected to a machine changeover switch 5 on one operation panel, and each of the machines 1 to 4 is provided with override switches 6 to 9 for setting an operation speed and the like. That is, the override switches 6 to 9 are required for the number of machines.

[0003]

However, as described above, if a plurality of override switches are provided, it becomes expensive, and the override switch is operated by mistake to apply an override to an unintended machine. There were problems such as breakage. The present invention has been made in order to solve the above-described problems, and in the case where a plurality of machines are connected to one operation panel, a single override switch may be used, inexpensively, and It is an object of the present invention to provide a machine control device that does not cause erroneous operation.

[0004]

In order to achieve this object, a machine control device according to a first aspect of the present invention is used for machining a workpiece.
To select multiple machines and one of the machines
Selection switch and the selection switch
Single override to change the override speed of
Selected by the override switch and the changeover switch.
The machine override speed is stored and the switch
Even if another machine is selected by the switch
Storage means to maintain the
Is stored regardless of the state of the override switch.
Selected first according to the override speed stored in the means.
Control means for controlling the speed of the machine.
You. According to a second aspect of the present invention, there is provided a machine control device according to the first aspect, wherein the control means includes a changeover switch for controlling the other device.
When the machine previously selected from the machine is selected again,
Override speed stored in storage means and current override
Compare the override speed with the ride switch and
If the speeds differ as a result of the comparison
Is stopped or decelerated. The machine control device according to claim 3 is the machine control device according to claim 1 , wherein
The storage means further stores a plurality of previous overrides for each machine.
The switch status is stored, and the control means
Id switch status and current override switch status
State, and as a result of the comparison, the override switch
Error processing when the status of the previous
Is Umono.

[0005]

According to the machine control device of the first aspect having the above configuration, whether a certain machine has been selected first (previous time) or not.
The other machine is selected by operating the changeover switch from
Even if the override switch is operated in the state,
The machine selected earlier was selected by re-selection
At the time (this time), the previous override speed of the machine is stored.
Stored in the means and the stored overlay
Operation at the speed
Will not cause any behavior
That a machine that was driven at unexpectedly high speeds
It is resolved and safety can be improved. Further, according to the machine control device of the second aspect, the state in which a certain machine is selected first
The other machine is selected from the state (previous) by operating the changeover switch.
Is selected and the override switch is operated in that state.
And then the machine selected earlier
Is selected (this time), the override switch last time
If the condition is different from this, stop the machine or
Slow down. According to the machine control device of the third aspect,
When the machine is switched to another machine by operating the changeover switch from a state in which a certain machine has been previously selected (previous time), and then the previously selected machine is reselected by switching again (this time). ), The state of the previous override switch of each of the plurality of machines is stored in the storage means, and the state of the previous override switch and the state of the current override switch are compared. If they are different, error processing is performed. Therefore, have changed override switch is operated state when switched to another machine, things like start operating at a high speed, such as the machine is not even over think when reselection is not Na.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a machine control device according to the present embodiment, and FIG. 2 is a front view of an operation panel 11 of an operation device in the device. The plurality of machines 1 to 4 are connected to one operating device for giving an operation command to each machine,
This operating device is provided with a machine changeover switch 5 for selecting any one of the machines 1 to 4 to be operated and one override switch 10 for changing an override speed of each machine. . On the operation panel 11, a display 12 and various operation keys 13 are arranged in addition to the machine changeover switch 5 and the override switch 10, and signals when these switches and keys are operated are transmitted to a control circuit (not shown). And an operation signal is output from the control circuit to each of the machines 1 to 4.

When the machine changeover switch 5 is switched, one machine is selected, and a signal validating the override speed change signal from the override switch 10 is transmitted to the selected machine. A signal that invalidates the signal is transmitted to other machines. Each of the machines 1 to 4 can determine whether the own machine is valid or invalid. Further, an operation signal from various operation keys 13 from the operation panel 11 is transmitted to the machine that has become effective as described above, and the state of the machine can be displayed on the display 12. I have.

The override switch 10 is a switch for controlling the speed of the machines 1 to 4, and can change the speed from 0 to 100% in increments of 10%. The speed is reduced by the setting value of this switch with respect to the speed. For example, when the override switch 10 should be set to 50%, it should move at 30 m / min, but actually moves at 15 m / min. Also, as shown in FIG. 1, the state of the override switch 10 can be known from each of the machines 1 to 4 at any time.

FIG. 3 is a block diagram of each machine. Each of the machines 1 to 4 has a CPU for controlling the machines therein.
16, a storage device 17 such as a ROM or a RAM storing various data, and a drive device 18 including a motor for driving a machine tool and the like. It reads and writes, outputs commands such as the operating speed of the machine to the drive unit 18, inputs operation information of various operation keys 13 from the operation panel 11, and displays on the display 12.

Next, the operation of the machine control device configured as described above will be described with reference to FIG. FIG. 4 shows C of machine 1
It is a flowchart which shows the processing procedure by PU16,
Other machines perform the same processing. When the process is started, the CPU 16 first performs initialization such as data clear of the storage device 17 (S1), and checks whether or not the machine 1 is selected (S2). Now, it is assumed that the operator operates the machine changeover switch 5 to select the machine 1 (Y in S2).
ES), a valid signal is output from the operation panel 11 to the machine 1, and an invalid signal is output to the other machines 2 to 4. Thereafter, the operation panel 11 is mainly connected to the machine 1 until the machine changeover switch 5 is operated. It will be in the state that was done. Next, the CPU 16 reads the setting of the override switch 10 (S3),
The setting state is stored in the storage device 17 (S4), and the machine 1
Is driven in the set state (S5).
For example, if the operator sets the override switch 10 to an override value of 10% and starts the operation of the machine 1, the machine 1 executes the operation at a normal 10% speed.

During operation of the machine 1, the CPU 16 checks whether or not the machine changeover switch 5 has been operated to select another machine (S6). If no other machine is selected (NO in S6), the CPU 16 proceeds to S3. Return to Now, even if the operator operates the machine changeover switch 5 to select the machine 2 (YE in S6).
S), the machine 1 continues to operate as it is, that is, in the above example at 10% of the normal state (S7). On the other hand, machine 2
Is selected, the operation panel 11 is connected to the machine 2 and
In this state, the operator sets the override switch 10 to 10
Assuming that the operation of the machine 2 is started with the override value of 0%, the machine 2 runs at a normal speed. After the above S7, the CPU 16 of the machine 1 checks again whether the machine 1 has been selected (S8). If the machine 1 has not been selected (NO in S8), the process returns to S7. Is operated again to select the machine 1 (YES in S8), the CPU 16 reads the setting of the override switch 10 at this time (this time) (S9),
This setting state and the storage device 17 at the time of the previous (previous) operation
Is compared with the state of the override switch 10 stored in (1) (S10).

As a result of the above comparison, if both match (S
If the answer is YES in S10, the process returns to S5, and the machine 1 continues the operation without stopping.
O), the CPU 16 stops the operation of the machine 1 to perform error processing (S11), displays an alarm on the display 12 on the operation panel 11, and notifies the worker that the machine 1 has stopped (S12). ). Thereafter, it is checked whether or not the alarm has been cleared (S13). If the alarm has been cleared by the operator (YES in S13), the process returns to the beginning.

As in the above embodiment, the mechanical changeover switch 5
When the same machine is selected again after the change of the machine, the error processing is performed when the speed of the previous operation and the current setting of the override switch 10 are different. The unexpected high speed operation of the selected machine is eliminated, and safety is improved. That is, for example, when the operator selects the machine 1, sets the override switch 10 to 10%, and starts the operation of the machine 1, the operator intends to switch the override switch 10 of the machine 1 to another machine. It is assumed that the override switch 10 has been switched. In such a case, the operator can use the machine 1
If the user moves slowly, and puts the body into the operating range of the machine 1 and starts driving, the machine 1 may operate faster than intended and collide with the body. In the present invention, such a situation is prevented from occurring. Furthermore, since one override switch 10 is shared by a plurality of machines 1 to 4, the cost can be reduced.

The present invention is not limited to the configuration of the embodiment described above, and various modifications are possible. For example, when the alarm is released in the process S13 of the flowchart shown in FIG. 4, the process returns to the beginning. Instead of returning to the state of the override switch 10 stored in the storage device 17 at the time of the previous (previous) operation, that is, the override value of 10% of the normal value in the above example, the operation is restarted. Is also good. In addition, when the speed at the time of the previous operation and the current setting of the override switch 10 are different,
The low-speed operation may be automatically started without stopping the operation. Further, in the above embodiment, the example in which the storage device 17 is provided in each of the machines 1 to 4 has been described. However, one storage device may be provided in common on the operation panel 11 side.

[0015]

As described above, according to the machine control device of the first aspect of the present invention , the selection is made first by the changeover switch.
Overridden if the previously selected machine is selected again
Automatically stored in the storage means regardless of the switch state
The machine operates without stopping at the ballide speed.
Behave in an unintended manner due to erroneous operation.
Will not cause cropping and the machine selected again
Driving at unexpected high speeds has been resolved,
Safety can be improved. According to the mechanical control device of the second aspect of the present invention, in addition to the above effects, the switching switch is provided.
When the machine previously selected by the switch is selected again
The stored override speed and current auto
Comparison of override speed with the override switch
As a result, when their speeds are different,
As the machine stops or decelerates,
Improve totality. According to the machine control device of the third aspect of the present invention, in addition to the above effects, when the same machine is selected again after the changeover of the machine by the changeover switch, the state of the previous override switch is changed. When the state of this override switch was different,
Since error processing is performed, is eliminated that, as operating at high speed is not applied even think is selected again the machine, Ru model improves safety.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a machine control device according to one embodiment of the present invention.

FIG. 2 is a front view of an operation panel of the apparatus.

FIG. 3 is a block diagram of each machine of the apparatus.

FIG. 4 is a flowchart showing a processing procedure in each machine.

FIG. 5 is a schematic configuration diagram of a conventional machine control device.

[Explanation of symbols]

 1-4 machine 5 machine changeover switch 10 override switch 11 operation panel (operation device) 16 CPU (control means) 17 storage device (storage means)

Claims (3)

(57) [Claims] 1. A plurality of machines for processing a workpiece
And a changeover switch for selecting one of the plurality of machines
And the overlay of the machine selected by the changeover switch.
Single override switch to change override speed
And the override of the machine selected by the changeover switch.
While memorizing the speed, the changeover switch allows other machines to
Storage means for maintaining the memory even in the selected state
And when the other machine is selected,
Stored in the storage means regardless of the state of the ride switch
Of the machine previously selected according to the override speed
A control device for controlling speed
Machine control device . 2. The control means according to claim 1 , wherein
The machine previously selected from the other machines is selected again.
When the override speed stored in the storage means is
And the override speed of the existing override switch.
Compare and their comparison resulted in different speeds
The machine is stopped or decelerated.
The machine control device according to claim 1 . 3. The apparatus according to claim 1, wherein said storage means further stores a plurality of machines.
The state of the previous override switch is stored, and the control means stores the previous state of the override switch and
Compare the current state of the override switch with the
As a result of the comparison, the previous and current state of the override switch
Error processing when different.
The machine control device according to claim 1 .