JP2012018511A - Numerical control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a numerical control device capable of executing general subsidiary instructions without creating any sequence program in order to reduce work load at a machine maker for creating a sequence of subsidiary instructions using a sequence program for executing a basic subsidiary instruction.SOLUTION: A numerical control device provided to a machine maker, which manufactures a machine including a numerical control device, comprises: a sequence processing section 103 that executes subsidiary instructions given through a processing program; a built-in subsidiary instructions processing section 117 that executes the subsidiary instructions without execution by the sequence processing section 103; a subsidiary instructions switch setting section 111 that sets either one of the sequence processing section 103 and the built-in subsidiary instructions processing section 117 to execute the subsidiary instruction; and a subsidiary instructions switch processing section 116 that switches between the sequence processing section 103 and the built-in subsidiary instructions processing section 117 to execute the subsidiary instructions based on the setting set by the subsidiary instructions switch setting section 111 when a subsidiary instruction is given.

Description

  The present invention relates to a numerical control (hereinafter referred to as NC) device that executes an auxiliary command of a machining program, and more particularly to an NC device that an NC device manufacturer supplies to a machine manufacturer that manufactures a machine with an NC device. is there.

The NC device informs the servo amplifier of the machining program's axis movement command to rotate the servo motor, and notifies the spindle amplifier to rotate the spindle motor to relatively move the workpiece and the tool. The workpiece is machined by moving it and bringing the tool into contact with the workpiece.
When machining, in addition to machining the workpiece, which is the original work, various functions such as workpiece attachment / detachment, spindle motor start / stop, cutting oil on / off, tool changer operation, etc. It is necessary to execute in the middle of execution.

A command for executing an auxiliary function other than commanding the coordinate position and operating the NC control axis with such a machining program is referred to as an auxiliary command. If there is an auxiliary command in the machining program, the sequence processing unit is notified that the auxiliary command has been issued. When the sequence processing unit executes processing corresponding to the auxiliary command and confirms the completion of the processing, the sequence processing unit notifies the machining program analysis processing unit of an auxiliary command completion signal. When receiving the auxiliary command completion signal, the machining program analysis processing unit advances the machining program to the next block.
If there is an auxiliary command in the machining program, the NC device operates as described above. However, the sequence program for executing this auxiliary command can be used by machine manufacturers or the end-users who install and sell the NC device in the machine. A manufacturer makes it according to the machine configuration and desired machine operation.

By the way, this auxiliary command needs to be executed by the sequence processing unit, which affects the processing time, and hence the machining time. Therefore, various techniques for improving this have been proposed.
For example, a machine maker who manufactures a machine tool with an NC device registers a macro module (user-defined program) or macro program for performing processing that has been performed in the conventional sequence processing in the NC device in advance, and an auxiliary command is issued from the machining program. When it is made, a technique for executing the macro module or macro program instead of the sequence processing has been proposed (see, for example, Patent Document).

  Japanese Patent No. 3535408

However, what is disclosed in the above-mentioned patent document is that the machine manufacturer must register the processing that has been performed in the conventional sequence processing as a macro module or a macro program, and the processing time can be shortened, but the burden on the machine manufacturer is not reduced. .
Even when a certain auxiliary command is registered as a macro module or macro program, there is a case where it is desired to execute the macro module or macro program in the sequence processing as usual without executing the macro module or macro program. However, the one disclosed in the above-mentioned patent document has a problem in that it lacks flexibility because a certain auxiliary command is registered as a macro module or macro program, and the macro module or macro program is always executed.

  The present invention has been made to solve such a problem, and a basic auxiliary command can be obtained by a process incorporated in advance by a machine maker that manufactures a machine tool with an NC device without creating a sequence program. It is an object of the present invention to obtain an NC device that can be realized by the above-described method and can switch between which auxiliary command is executed.

  In order to achieve the above object, according to the present invention, in a numerical controller supplied to a machine maker that manufactures a machine with a numerical controller, a sequence processing unit that processes an auxiliary command instructed by a machining program, and the auxiliary command Embedded auxiliary command processing unit for processing without processing by the sequence processing unit, and when the auxiliary command is commanded, whether this auxiliary command is processed by the sequence processing unit or the built-in auxiliary command processing unit Auxiliary command switching processing means for arbitrarily switching between.

  In addition, according to the present invention, the built-in auxiliary command processing unit has a function of controlling execution start timing by an external signal when the auxiliary command is executed.

  According to the present invention, a machine maker that manufactures a machine tool with an NC device does not create a sequence program for processing a basic auxiliary command, and the basic auxiliary command is processed in advance in the process. Can be realized. In addition, it is possible to switch whether the auxiliary command is processed by the sequence processing unit or the built-in auxiliary command processing unit, and thus a flexible NC device can be obtained.

  Further, according to the present invention, even when the auxiliary command processing unit is used, it is possible to obtain an NC device that can be interlocked by an external signal and can be used more generally.

It is a block diagram which shows the structure of NC apparatus which concerns on Example 1 of this invention. It is a flowchart which shows the auxiliary | assistant command processing procedure of NC apparatus which concerns on Example 1 of this invention. It is a figure which shows the process program containing the auxiliary | assistant command which concerns on Example 1 of this invention. It is a figure which shows the example of an auxiliary command switching setting parameter which concerns on Example 1 of this invention.

Example 1.
Embodiment 1 of the present invention will be described below with reference to FIGS. The first embodiment is an example in which the NC device is applied to a machining center.
FIG. 1 is a block diagram showing the configuration of an NC apparatus according to Embodiment 1 of the present invention, where 100 is an NC apparatus, and 130 is a machine tool (machining center). The machining program 101 is analyzed and executed by the machining program analysis processing unit 115. The sequence program 102 is read by the sequence processing unit 103 and executed. The parameter setting unit 110 includes an auxiliary command switching setting unit 111 that switches whether the auxiliary command is internally processed by the built-in auxiliary command processing unit 117 or executed by the sequence processing unit 103. The auxiliary command switching setting unit 111 will be described later with reference to FIG.

The machining program analysis processing unit 115 includes an auxiliary command switching processing unit 116, which is executed when the auxiliary command is read and analyzed. If the auxiliary command switching setting unit 111 is set to sequence processing, the auxiliary command is transmitted from the machining program analysis processing unit 115 to the sequence processing unit 103 via the sequence interface unit 104. When the auxiliary command switching setting unit 111 is set to the built-in auxiliary command processing, the auxiliary command is not output to the sequence interface unit 104 but is output to the built-in auxiliary command processing unit 117, and the built-in auxiliary command processing unit 117 Execute the process.
The built-in auxiliary command processing unit 117 has a function that can execute the auxiliary command (S, M3, M4, M5, M19) shown in FIG. It is incorporated.
In this embodiment, the auxiliary command switching setting unit 111 and the auxiliary command switching processing unit 116 constitute auxiliary command switching processing means.

  The control processing unit 121 is a processing unit including an interpolation processing function that generates a command position and a speed. The control processing unit 121 includes an NC axis control processing unit 122 that controls the NC axis, and a spindle control processing unit 123 that controls the spindle. A movement command based on the machining program is transmitted from the machining program analysis processing unit 115 to the control processing unit 121. When the auxiliary command switching setting unit 111 is set to sequence processing, auxiliary commands such as a forward rotation command and reverse rotation command of the spindle are transmitted from the sequence processing unit 103 to the control processing unit 121 via the sequence interface unit 104. When the auxiliary command switching setting unit 111 is set to the built-in auxiliary command processing, the built-in auxiliary command processing unit 117 transmits auxiliary commands such as a forward rotation command and a reverse rotation command for the spindle. The control processing unit 121 notifies the machining program analysis processing unit 115 and the sequence interface unit 104 of the servo axis and spindle status. The servo / spindle communication interface unit 120 notifies the movement command from the control processing unit 121 to the spindle amplifier 132 and the servo amplifier 134. The spindle amplifier 132 rotates the spindle motor 131 to rotate the spindle. The servo amplifier 134 drives the servo motor 133 to operate the table and the like.

Via the input / output signal interface unit 125 and the sequence interface unit 104, input signals such as sensors and switches of the machine tool hydraulic sensor 136 are transmitted to the sequence processing unit 103, and from the sequence processing unit 103 to the hydraulic equipment 137, etc. An output signal for operating peripheral devices is transmitted.
The input / output device 140 is a man-machine interface unit such as a display device or a keyboard, and displays and edits the parameters of the parameter setting unit 110, the machining program 101, and the sequence program 102.
As described above, the NC device according to the first embodiment is configured.

  Next, operations of the sequence processing unit 103, the auxiliary command switching processing unit 116, and the built-in auxiliary command processing unit 117 when the machining program analysis processing unit 115 reads and analyzes the auxiliary command of the machining program 101 of FIG. It demonstrates using the flowchart of these.

  For example, as illustrated in FIG. 4, the operation of the M code to be embedded is registered in advance in the auxiliary command switching setting unit 111 using the input / output device 140. This auxiliary command switching setting unit 111 sets how to operate each auxiliary command. The S command is an auxiliary command for setting the spindle rotation speed, the M3 command is a spindle forward rotation command, the M4 command is a spindle reverse command, the M5 command is a spindle stop command, and the M19 command is a spindle orientation command. In the case of the setting shown in FIG. 4, the S command M5 indicates that the built-in auxiliary command processing unit 117 performs processing without waiting for an interlock release signal or the like from the sequence processing unit 103. M3 and M4 are processed by the built-in auxiliary command processing unit 117, but the start of processing indicates that processing for waiting for an interlock release signal from the sequence processing unit 103 is performed. Further, the M19 command indicates that the processing is performed by the sequence processing unit 103 without being processed by the built-in auxiliary command processing unit 117. In this embodiment, it is assumed that only auxiliary commands that can be executed by the built-in auxiliary command processing unit 117 are those registered in FIG.

  The execution of the machining program 101 is started, and the built-in auxiliary command switching processing unit 116 in the machining program analysis processing unit 115 reads the block N10, refers to the setting content of the auxiliary command switching setting unit 111, and is to be incorporated in step S101. It is determined whether it is an auxiliary command. The M8 command of block N10 determines that there is no built-in auxiliary command processing, and the process proceeds to step S110. The “auxiliary command processing by the conventional sequence processing unit” in step S110 is to notify an auxiliary command signal to the sequence processing unit 103 via the sequence interface unit 104, and the sequence processing unit 103 performs processing corresponding to the auxiliary command. This is a process for notifying the machining program analysis processing unit 115 of the auxiliary command completion signal when it is completed.

  After the machining program analysis processing unit 115 confirms the auxiliary command completion signal, the process proceeds to step S106. In this case, the machining program analysis processing unit 115 notifies the M8 command to the sequence processing unit 103 via the sequence interface unit 104, and the sequence processing unit 103 performs processing for adding coolant. In order to put the coolant, the peripheral device is operated via the sequence interface unit 104 and the input / output signal interface unit 125. If the sequence processing unit 103 can confirm the start of the operation of the peripheral device, the processing program analysis processing unit 115 is notified of the completion of the auxiliary command via the sequencer interface unit 104. When the machining program analysis processing unit 115 confirms the completion of the auxiliary command, the process proceeds to the next block in step S106.

  Next, when the block N20 is read, the S command is included in the assembly target auxiliary command in step S101, and the process proceeds to step S102. In step S102, the operation location of the auxiliary command switching setting unit 111 is confirmed, and it is determined that the S command is an incorporation process, and the process proceeds to step S103. Since there is no interlock setting for the S command, the process proceeds to step S105, and the built-in auxiliary instruction execution processing unit 117 performs auxiliary instruction execution processing. In step S102, when the operation location of the auxiliary command switching setting unit 111 is not an incorporation process but a sequence process, the process proceeds to step S110. The built-in auxiliary command processing unit 117 incorporates in advance a function for notifying the spindle processing unit 123 of the spindle rotation speed data of the S command. Here, the spindle controller 123 is notified to set the spindle rotational speed to 1000 r / min, and the process proceeds to the next block in S106.

  Next, when the block N30 is read, the M3 command has a built-in internal process, and the auxiliary instruction switching setting unit 111 is a built-in process, so the process similarly proceeds to step S103. Since the M3 command is waiting for an interlock, the process proceeds to step S104 and waits for the interlock to be released. Here, the M3 command is an auxiliary command for causing the main shaft to rotate forward.

  In the interlock release waiting block in step S103, the M3 command is notified to the sequence processing unit 103 via the sequence interface unit 104. In the sequence processing unit 103, for example, it is possible to execute the normal rotation of the spindle after confirming the peripheral conditions such as the hydraulic pressure for cooling oil for maintaining the spindle temperature constant and the state of the machine. Judge that When the execution becomes possible, the sequence processing unit 103 notifies the built-in auxiliary command processing unit 117 of the interlock release signal via the sequence interface unit 104.

  When the built-in auxiliary command processing unit 117 recognizes the release of the interlock in step S104, it notifies the main shaft control unit 123 of the control processing unit 121 of a main shaft normal rotation command. The spindle control unit 123 outputs a command to the spindle amplifier 132 via the servo / spindle communication interface unit 120. The spindle amplifier 132 gives a current command to the spindle motor 131 so as to rotate forward at a speed of 1000 r / min. When the built-in auxiliary command processing unit 117 receives the M3 command, it receives the rotation speed of the spindle motor 131 from the spindle control unit 123, and recognizes the completion of the auxiliary command when the feedback speed of the spindle reaches the rotation speed set by the S command. The function is built in beforehand. In this embodiment, if it is confirmed that the speed reaches 1000 r / min, it is considered that the M3 command is completed, and the process proceeds to the next block in step S106.

  Next, since the block N40 and the block N50 do not include an auxiliary command, the auxiliary command switching processing unit 117 does not perform processing. That is, the machining program analysis processing unit 115 passes the commands of the blocks N40 and N50 to the control processing unit 121. Next, when the block N60 is read, the M5 command, like the S command, has a built-in auxiliary command, and the built-in auxiliary command does not wait for an interlock, so the process proceeds to step S105.

  When the M5 command is received, the built-in auxiliary command processing unit 117 notifies the spindle control unit 123 of the spindle stop command, and the spindle control unit 123 notifies the spindle amplifier 132 of the spindle stop command, and the spindle motor. The function of recognizing the completion of the auxiliary command when the stop of the main shaft 131 is stopped and the stop of the main shaft can be confirmed in the main shaft state notified from the main shaft control unit 121 is incorporated in advance. In step S105, the spindle stop is executed by the built-in auxiliary command processing unit 117, and the process proceeds to the next block in step S106.

  When the next block N70 is read, there is an M19 command, and the auxiliary command switching processing unit 117 determines that there is an auxiliary command to be incorporated (step S101), and the setting of the auxiliary command switching setting unit 111 is a sequence process. The process proceeds to command processing (step S102). The M19 command is notified to the sequence processing unit 103 via the sequence interface unit 104. The sequence processing unit 103 notifies the spindle orientation command to the spindle control unit 123 via the sequence interface unit 104, and executes the orientation.

In this embodiment, the auxiliary command switching setting unit 111 of the parameter setting unit 110 is used to switch whether the operation auxiliary command is realized by the built-in auxiliary command processing unit 117 or the sequence processing unit 103. Instead, it is possible to switch using an external signal from the sequence interface unit 104. In this case, the auxiliary command switching processing means includes the auxiliary command switching processing unit 116 and the external signal input unit.
In addition, the function for processing the auxiliary command for the S command, the main spindle forward rotation, the main shaft reverse rotation, the main shaft stop, and the main shaft orientation has been described in the built-in auxiliary command processing unit 117 in advance, but other auxiliary commands are processed. The functions may be incorporated in the built-in auxiliary command processing unit 117 in advance.

According to this embodiment, a machine maker that manufactures a machine tool with an NC device does not create a sequence program for processing a basic auxiliary command, and the basic processing is performed in advance in the NC device. Can be realized with simple auxiliary commands.
In addition, it is possible to switch whether the auxiliary command is processed by the sequence processing unit or the built-in auxiliary command processing unit, and thus a flexible NC device can be obtained.
In addition, even when the built-in auxiliary command processing unit is used, the start of auxiliary command processing can be changed to an arbitrary timing by an external signal from the sequence processing unit or the like, and thus a more versatile NC device can be obtained. Can do.

  The numerical control device according to the present invention is suitable for use as a numerical control device that desires high-speed processing of auxiliary command processing.

  100 NC device, 101 machining program, 102 sequence program, 103 sequence processing unit, 104 sequence interface unit, 110 parameter setting unit, 111 auxiliary command switching setting unit, 115 machining program analysis processing unit, 116 auxiliary command switching processing unit, 117 incorporation Auxiliary command processing unit, 120 servo / spindle communication interface unit, 121 control processing unit, 122 NC axis control unit, 123 spindle control unit, 125 I / O signal interface unit, 130 machine tool, 140 I / O device.

Claims (4)

  In a numerical control device supplied to a machine manufacturer that manufactures a machine with a numerical control device, a sequence processing unit that processes an auxiliary command instructed by a machining program, and processes the auxiliary command without processing by the sequence processing unit A built-in auxiliary command processing unit; and an auxiliary command switching processing unit that arbitrarily switches whether the auxiliary command is processed by the sequence processing unit or the built-in auxiliary command processing unit when the auxiliary command is commanded. A numerical control device provided.   The auxiliary command switching processing means includes an auxiliary command switching unit for setting a parameter as to which of the sequence processing unit and the built-in auxiliary command processing unit processes the auxiliary command, and when the auxiliary command is commanded, the auxiliary command switching unit Based on the setting of the auxiliary command switching setting unit, an auxiliary command switching processing unit that switches between processing by the sequence processing unit or processing by the built-in auxiliary command processing unit, The numerical control device according to claim 1.   The auxiliary command switching processing means includes an input unit for inputting an external signal indicating whether the auxiliary command is processed by the sequence processing unit or the built-in auxiliary command processing unit, and the auxiliary command when the auxiliary command is commanded. 2. An auxiliary command switching processing unit that switches between processing by the sequence processing unit and processing by the built-in auxiliary command processing unit based on the external signal. Numerical control unit.   The numerical control according to claim 1, wherein the built-in auxiliary command processing unit has a function of controlling an execution start timing by an external signal when the auxiliary command is executed. apparatus.

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