JPS61243506A - Nc controller with operation preparing function - Google Patents

Abstract

PURPOSE:To eliminate the troublesome operation for operation preparation by automating the operation preparation from power-on to the operation start and that to the operation restart after emergency stop of operation. CONSTITUTION:In the power-on initial stage, data from an operation preparation start data memory 106 is converted to an output command signal through a conversion circuit 117 and individual solenoid valves of an NC machine tool are operated successively to perform a prescribed operation preparation. In case of emergency stop, values Lc, Lt, and Lg at the emergency stop time are stored in operation data memories 111a-111c from an operation data register 108 through a gate circuit 109. When an operation restart signal is issued by an operation restart button, the contents in memories 111c, 111b, and 111a are sent to the conversion circuit 117 successively as input signals and are converted to output command signals, and they are sent to solenoid valves successively to operate hydraulic cylinders 15, 17, and 14. Thus, the solenoid valves are operated successively automatically by the depression of the button to perform the preparation to the operation start or the operation restart.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides operation preparation operations from turning on the power of the NC control device of a machine tool until the start of operation, as well as operation preparation operations until operation restart after an emergency stop during operation. The present invention relates to an NC control device having an automated operation preparation function.

[Conventional technology]

Conventionally, in the NC control device of a machine tool, the operation preparation operation from turning on the power to the NC control device to starting or resuming operation, that is, turning on each switch of the power panel and the NC device, and then resetting the emergency stop button. After that, warm-up is performed for various preparatory operations such as opening and closing of the chuck and back and forth movement of the tailstock, and the operator confirms that the N
C is about to start operating. Moreover, the current situation is that the operator manually operates various buttons as a means to perform the operation preparation operation. In addition, preparatory operations for restarting operation after an emergency stop are performed by the operator manually operating various buttons in the same manner as for starting operation.

[Problem that the invention seeks to solve]

However, the conventional operation is complicated, requires a skilled worker to judge whether the preparation state is good or bad, and is very time-consuming and inefficient.

The object of the present invention was proposed in order to solve the problem in view of the above circumstances, and the purpose of the present invention is to automatically automatically perform the operation preparation operation or operation restart operation simply by an operator pressing the operation preparation push button or the operation restart push button. An object of the present invention is to provide an NC control device having an operation preparation function that allows the operation to be carried out in the following manner.

[Means and effects for solving the problems] The present invention attempts to convert the operation preparation operation from manual to automated. An NC control device that performs machining using a machine program; an operation input/output means for receiving input and output of operating conditions between the NC control device and the NC machine tool; and input/output command data conversion for the operation input/output means. an operation start data memory that stores operation operation data at the time of starting operation preparation; and an operation start data memory that stores operation operation data at the time of starting operation preparation; and an operation start data memory that grasps the operation state of the NC machine tool. Since the operation preparation operation is automated by the present invention, operation can be started with a single push button.

〔Example〕

One embodiment of the present invention will be described in detail based on the drawings.

FIG. 1 is a model diagram explaining the present invention in detail. 1st
In the figure, the upper part is a schematic diagram of the NC machine tool, and the lower part from the center is a control block diagram for controlling the NC machine tool. In the NC machine tool, the part surrounded by dotted lines indicates the part (headstock and fixed base) that supports the movable part.

A chuck 2 is attached to the front surface of the main shaft 1, and a workpiece W is gripped by the chuck 2 via claws 3. A tailstock 4 is placed in front of the main spindle 1, and a center 5 is attached to the front of the tailstock 4, and the center 5 supports the center of the end face of the workpiece W.

A gear 7 meshed with a low speed range gear 6 fitted on the main shaft 1 is fitted on an intermediate shaft 8. A pulley 9 is fitted to the rear part of the intermediate shaft 8, and a boot 1,
111 is fitted. A belt 10 is wound around pulley 9 and pulley 11.

Therefore, the rotation of the motor 12 is caused by the rotation of the pulley 11 and the belt 1.0.
The rotation is transmitted to the intermediate shaft 8 via the pulley 9, and further transmitted to the main shaft 1 via the gear 7.6.

A shifter 13 fitted into a groove of the gear 7 is connected to a cylinder 14, and a dog 14a is attached to the other end of the cylinder I4.

The shifter 13 is moved forward and backward by the operation of the cylinder 14, and the high speed range gear 7a is engaged with the gear 6a fitted on the main shaft 1, and the low speed range gear 7 is meshed with the gear 6 fitted on the main shaft.

At this time, hydraulic pressure is supplied from the P boat, and the cylinder 14 is operated via solenoid valves Sgl and Sg2 that return hydraulic pressure to the T port. To detect the position of cylinder I4,
a dog 14a attached to the rond of the cylinder 14;
This is done by limit switches l, g 1°5g2.

A rotary hydraulic cylinder 15 is attached to the rear end of the main shaft 1, and opens and closes the pawl 3 by means of a connecting rod (circle) provided in the through hole of the main shaft 1.

That is, hydraulic pressure is supplied from the P boat, and the cylinder 15 is operated via solenoid valves SCI and SC2 that return the hydraulic pressure to the T boat. The position detection of the cylinder 15 is as follows:
This is done by a dog 15a attached to the cylinder I5 and a limit switch Lc1°LC2.

On the other hand, a hydraulic cylinder 17 is attached to the rear of the tailstock 4 for moving the center 5 attached to the front side of the tailstock 4 back and forth.

The operation of the hydraulic cylinder 17 is supplied with hydraulic pressure from the P boat, and the solenoid valve St+ returns the hydraulic pressure to the T boat.
This is done via St2. Position detection is done using the dog 17a attached to the cylinder 170 and the limit switch L.
This is done by tl and Lt2.

Glue for switching the rotation range of spindle 1, Misotosinch Lg+,
1, g2. Glue mint switch LCI for opening/closing claw 3
, LC2 and the limit switches Lt+ and Lt2 for longitudinal movement of the center 5 are input as input signals to the CPU 100 via the NG control device interface] and OI. Also, via the interface 102, the CPU
Solenoid valves Sg+ and 3g2 actuate the hydraulic cylinders 14 for rotation of the main shaft 1 as output signals at 00, respectively.
゜Solenoid valves SCI and SC2 that operate the hydraulic cylinders 15 for opening and closing the claws 3 and solenoid valves 5t+ that operate the hydraulic cylinders 17 for longitudinal movement of the center 5
, 3t.

Screen Example NC data, preparation data, etc. are input from the keyboard 103 via the input/output device], 03a. The operation panel 104 includes an operation preparation button, an operation restart button, etc., and command data is transmitted via an interface 104a. Further, the NC program data is recorded in advance in the NC program data memory 105.
+ will be added.

Further, data for performing the operation preparation start operation at the initial stage of power-on is inputted from the screen keyboard 103 and stored in the operation preparation start data memory 106.

If the NC machine tool is to be operated by NC, the operator presses the operation preparation button on the operation panel 104 after turning on the power, and the operation preparation start signal causes the AND gate 107 to open. The AND gate 107 sequentially operates the opening of the chuck 3, the retraction of the center 5 and the low speed rotation range of the spindle 1 stored in the operation preparation start data memory 106, or the warming amplifier for each operation. After that, start operation data for sequential operation is imported. Operation preparation start data is and game) 107
It is converted into an output command signal through a conversion circuit 117 to sequentially operate each solenoid valve of the NC machine tool, and is converted into an operation program data memory 118.
is stored once.

The output command signals for the opening/closing operation of the chuck 2, the back-and-forth operation of the tailstock 4, and the high-low speed rotation range switching operation of the spindle 1 stored in the operation program data memory 118 are sequentially sent out to perform operation preparation operations.

Further, when the NC machine tool starts operating and is in operation, the signals of each switch jump into the operation data register 08. Signals from each switch that are input during each operation during operation are always stored with a flag set to 1 for each switch in the operation data register 108. In Fig. 1, the flag II 1'' is set on the switches LCI, Ltl and T=g1.NC
If an emergency stop occurs due to some trouble during operation, the emergency stop signal enters the operation circuit 109a of the gate circuit 109 to operate the gate circuit 109, and the flag data of the operation data register 08 at that time, for example -g t
The signal of Lt+ is stored in the operation data Ig/memory 11a.
The signal is sent to the operation data Lt/memory 111b and Lc
The + signal is taken in and stored in the driving data Lc and memory 11C, respectively.

Then, when the operation restart signal is issued from the operation panel 104, the AND game 1-112 is opened, and the operation date/memory L is
The L c + signal stored in c is output through AND gate 112 and input to conversion circuit 117 . The conversion circuit 117 converts the Lc+ signal, which is an input signal, into a command signal for the solenoid valve 3c+, which is a corresponding output signal, and temporarily stores it in the operation program data memory 118. The output signal Sc+ stored in the operation program data memory 118 is outputted via the ink face 102 and sent to the solenoid valve Sc+ of the cylinder 15 for opening and closing the claw 3 to operate it.

Further, the l and c+ signals that have passed through the AND gate 1]2 are taken into the conversion circuit 117 and taken into the SET memory 113. The SET/memo 1J113 sets a bit signal to open the AND gate 114.

Operation data Lt/L stored in memory 1llb
The signal at t 1 passes through AND gate 114 and is output and input to conversion circuit 117 . The conversion time 1i! 81
17 Solenoid valve 3 corresponding to I-t + signal
It is converted into an output command signal of t+ and temporarily stored in the driving operation program data memory 118. 3t stored in 1 B
A + output signal is outputted via the interface 102 and sent to 3t+ of the longitudinal movement hydraulic cylinder 17 of the center 5 to operate it.

The Lt+ signal that has passed through the AND gate 114 is taken into the conversion circuit 117, and is also sent to the SET memory 115.
be taken into account. The SET memory 115 generates a hit signal and causes the AND gate 116 to open. Driving data L
The L g 1 signal stored in the g memory 111 a passes through the AND gate 116 , is output, and is input to the conversion circuit 117 . The conversion circuit 117 converts the Lgl signal into a corresponding output signal of the solenoid valve Sg+, which is temporarily stored in the operation program memory 118. The output signal of 3g+ stored in the operation program memory 11B is outputted via the interface 102, and the output signal of 3g+ of the hydraulic cylinder 14 for rotation of the main shaft 1 is outputted via the interface 102.
It is sent to and activated.

In this way, by pressing the operation preparation start button or the operation restart button at the time of emergency stop on the operation panel 104, the operations are automatically performed sequentially, and preparation operations for operation start or operation restart are performed.

The operation of the present invention will be explained based on the flowchart of FIG.

In Figure 2, when the power switch is turned on as the 0th stage and the operation preparation switch is turned on, the operation preparation is turned on as the 0th stage when the power switch is turned on, that is, at the beginning of the power-on. The operation begins. The operation preparation start data from the operation preparation start data memory 106 is converted into an output command signal via the conversion circuit 117, and the output signal is used to sequentially operate each solenoid valve of the NC machine tool to perform predetermined operation preparation.

After the operation is completed in the second stage, NC operations such as editing of the NC program, MDI (manual data input) operation, or automatic operation are performed.

As the 0th stage, it is determined whether an emergency stop has been applied during the NC operation or during the NC operation, and if the emergency stop has not been applied, the process returns to before stage 2 and the NCi operation is continued. If a non-stop occurs, the process advances to stage 0, and the operation data for restarting operation is transferred from the operation data register 108 to data 1.
- operating data memory 111 (ll
Lc, Lt, and Lg values at the time of emergency stop are stored in 1a to 111c). At the 0th stage, a check is made to see if the state of restarting operation has been reached, and when a restart signal is issued by the restart button, the operation for resuming operation at the time of an emergency stop is performed at the 0th stage. That is, each operation data memory 1llc,
1llb and 111a are sequentially sent as input signals to the conversion circuit 117, where they are converted into output command signals, and the output signals are sequentially sent to the solenoid valves of the NC machine tool to control the respective hydraulic cylinders 15, 17 and 14. Activate. By repeating the above-mentioned operations, the operation restarting operation especially during an emergency stop is performed. In this example, the operation preparation operation is performed sequentially in order to ensure safety and reliability, but if there is no problem with safety or reliability, the operation preparation can be automated using simultaneous parallel operations. I don't mind it at all.

〔effect〕

The present invention automates the operation preparation operation from turning on the power of the NC control device of the machine tool to the start of operation, and the operation preparation operation from the restart of operation after an emergency stop during operation, so operation can be started with a single push button. becomes possible. This makes it easy for even unskilled people to operate the machine, eliminates the need for complicated operation preparations, and prevents dangers such as malfunctions, leading to improved safety.

By automating the operation preparation operation according to the present invention,
Productivity efficiency will be greatly improved.

[Brief explanation of drawings]

FIG. 1 is a model diagram explaining the present invention in detail. Second
The figure is a flowchart illustrating the invention in detail. ■・・・Main shaft 3・・・Claw 4・
...Tailstock 5...Stop center 6.6a, 7.7a...Gear 12...
Motor 13...Softer 14, 15, 17...
・Hydraulic cylinders 14a, 15a, 17a...Dock LCI, LC2, Ltd, Lt2+ Lg'+ Lg
""Solenoid valve Sc+, SC2, SL+, Stl, S
L+, 5C2-...Limit switch 100...CP tJ 101,102-
...Interface 103...Screen (-J Keyboard 103...Operation panel 105...NC program data memory 106
... Operation preparation start data memory 108 ... Operation data register 109 ... Kate circuits 111a, 111b, 111c ... Operation data memory] 17 ... Conversion circuit 11B ... Operation operation program data・Memory W...
····work

Claims (1)

[Claims] an NC machine tool; an NC control device that causes the NC machine tool to perform machining according to an NC machining program; an operation input/output means for receiving input and output of operating conditions between the NC control device and the NC machine tool; an operation operation conversion means for converting input/output command data of the operation operation input/output means; an operation preparation start data memory for storing operation operation data at the time of starting operation preparation; grasping the operation state of the NC machine tool;
An NC control device having an operation preparation function comprising operation restart data processing means for sending operation restart data to the operation operation conversion means at the time of operation restart.