JPH01124006A - Numerically controlled machine tool - Google Patents

Abstract

PURPOSE:To simplify operation and to eliminate the need for working for allowing an operator to insert an auxiliary function command into a program by converting an auxiliary function object and its command collectively into a working program in addition to a coordinate position and then storing the converted result in a memory at the time of executing command operation. CONSTITUTION:While rotating a tool fitted to a main spindle similarly to a working case, outputs from a position detector S for detecting a working position are inputted to a numerical controller PU at a prescribed reading time interval. When a control command for an auxiliary function such as a main spindle motor is set up, the control command value is inputted and combined with working position data to store these data in a memory M as a working program. Consequently, operation can be simplified and it is unnecessary for the operator to read out the working program and input keys.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a numerically controlled machine tool that allows machining programs to be easily created.

<Prior art> Before machining a workpiece, this type of numerically controlled machine tool moves the spindle, on which a machining tool is attached, to the desired machining position by operating a pulse generator.
By operating a memory button or the like, the output of the position detector provided on each axis is read and stored in the memory.

<Problems to be Solved by the Invention> However, in such numerically controlled machine tools, the pulse generator is manually operated by an expert to move the spindle, and the operator operates the memory button. Only the coordinate values of the machining position are stored. Therefore, if you want to change the rotation speed of the spindle by using a function such as override on the spindle rotation while memorizing the machining position, the operator must read the machining program in which the machining position is stored after the machining position has been memorized. The rotation control commands for the spindle were manually input using keys during the machining program, which was cumbersome to operate.

In addition, the override value is usually expressed as a percentage value, and when applying an override to the spindle rotation speed, a predetermined calculation is performed from the specified spindle rotation speed and the override value, and the actual spindle rotation speed is calculated. The calculations were troublesome because the operator had to read out the machining program and input the keys manually.

〈Means for solving problems〉 FIG. 1 is an overall configuration diagram for clearly explaining the present invention.

In order to solve the above-mentioned problems, the present invention has been developed to transmit the coordinate values of the machining position detected by the position detector S to a numerical control device at predetermined time intervals during machining of a workpiece as the main axis moves by operating a pulse generator. An input means 100 for inputting information, an auxiliary function setting means 200 for setting control commands for auxiliary functions such as a spindle motor, an importing means 300 for taking in set values set by the auxiliary function setting means 20 (l), and an input means 1
Converting means 40 converts the output of 00 and the value taken in by the taking means 300 into a machining program and stores it in the memory M.
0. - <Operation> While rotating the tool attached to the spindle in the same way as during machining, the output from the position detector S that detects the machining position is input to the numerical controller PU at predetermined reading time intervals, and at this time the spindle When a control command for an auxiliary function such as a motor is set, this control command value is captured and stored in the memory M as a machining program along with machining position data.

<Example> Embodiments of the present invention will be described below based on the drawings.

In FIG. 2, 10 is a numerical control device, and this numerical control device 10 is mainly composed of a sequence control device 20 and an NC program processing device 30.

On the other hand, 50 is a machining center controlled by the numerical control device 10 having the above configuration. This machining center 50 has servo motors 51, 52, 53 that drive each axis.
is attached to the workpiece table 54 that supports the workpiece W by the rotation of the servo motors 51, 52, and 53.
and a spindle head 57 that supports a spindle 56 driven by a spindle motor 55 is changed three-dimensionally in the x, y, and z directions. Further, 58 is a tool magazine that holds a plurality of types of tools, and the tools in the tool magazine 58 are selectively mounted on the spindle 56 by a magazine indexing device and a tool changing device 59 of the circuit to process the workpiece W. will be held.

The sequence controller 20 is composed of an arithmetic processing unit 21, a RAM 22a, a ROM 22b, and an interface 23. A spindle motor drive circuit 24 for controlling the rotational speed of the spindle motor of the machining center 50 is connected to the arithmetic processing unit 21 via a circuit interface, and the ink face 23 is connected to a data input device 25. An operation panel 26 for storing position data that can be specified is connected. This operation panel 26 has an
Three types of pulse generators 26X for axial circumference, Y-axis, and Z-axis circumference,
26Y and 26Z are provided.

As shown in FIG. 3, the data input device 25 includes a spindle override switch 90 for temporarily increasing the rotation speed of the spindle motor 55 in units of several percent, as well as a button for starting input of circuit coordinate position data. , data input keys for setting the rotation speed of the main shaft, etc. are provided.

The NC program processing device 30 includes an arithmetic processing device 31
, RAM32a, ROM32b, interface 33
It is made up of. A pulse generator 34 for manual feeding and a CRT display device 35 are connected to this interface 33. Further, position detectors 61, 62, 63 that detect the coordinate positions of each axis are connected to the arithmetic processing unit 31 via an interface 60, and a servo motor drive circuit that drives the servo motors 51, 52, 53. D
UX, DUY, and DUZ are connected via a circuit interface.

70 is an interface for exchanging data between the arithmetic processing units 21 and 31.

In the above configuration, the operation of the numerical control device 30 when creating an actual numerical control program will be explained.

First, the workpiece W is placed on the workpiece table 54, a tool to be used for machining is selected from the tool magazine 58, and the spindle 56 is
Attach to. Next, the main shaft motor 55 is similarly driven to rotate at the same rotation speed as during machining.

After the above operations are completed, the workpiece W is actually machined by manual operation by an expert.

In the manual operation of Party B, when a button for inputting circuit coordinate position data is pressed by an expert from the data input device 25,
The input of the pulse generator 26 for storing position data is enabled.

In this state, the arithmetic processing unit 21 causes the RC1M22b
The program shown in FIG. 4, which is stored in , is executed.

In step 200, the number of revolutions 80 of the main shaft 56 is set by the operator via the data input device 25. This operation is performed by inputting a program using a G code that instructs the spindle motor 55 to rotate.

Next, in step 201, it is determined whether the input of the coordinate position is completed, and if this determination is completed, the execution of this program is completed. If the coordinate position input is not completed, the process moves to the next step 202, and the pulse generators 26X, 26Y, 26Z (
7) By operation, the output signal output from each pulse generator is input to the arithmetic processing unit 21 via the interface 23, further inputted to the arithmetic processing unit 31 of the NC program processing unit 30 via the interface 70, and Commands corresponding to output signals output from the arithmetic processing unit 31 by operating each pulse generator are sent to the servo motor drive circuit DUX.
, DUY, DUZ are sent, pulses are distributed to the servo motors 51, 52, and 53 provided on each axis, and the main spindle 56 is moved to move the workpiece table 5 as shown in FIG.
The workpiece W placed on 4 is machined by the tool T. In this FIG. 5, the center position PO~P of the tool T with radius R
The coordinate position of n (the upper point on the tool path) is set by the servo motor 51.
, 52.53 mounted position detector 61.62.6
Load from 3. Next, in step 203, the rotation speed S of the spindle is determined when the current position PO (Xn, Yn, Zn) is read in step 202.

Determine whether changes have been made to auxiliary functions such as This determination is made in step 300 as shown in FIG. 6, in which the rotation speed S of the main shaft is determined. - It is determined whether the override switch 90 that changes the time has been operated. If it is determined that the override switch 90 has not been operated, the process moves to step 204. If it is determined that the override switch 90 has been operated, the process moves to the next step 301 and the override command value Ov is read.

In step 302, the override command value Ov read in step 301 and the spindle rotation speed S before operating the override switch 90 are determined. From this, the main shaft rotational speed S when the override switch 90 is operated is calculated based on the following calculation formula.

Next, the process moves to step 204, where the current position PO (Xn, Yn, Zn) read in step 202 and the spindle rotation speed S calculated in step 302 are converted into NC data. In step 205, the NC data converted in step 204 is stored in the RAM of the NC program processing device 30.
32a. Next, in step 206, processing of this program is stopped for 0.1 second of a predetermined reading time interval.

In the next step 207, it is determined whether 0.1 second of the reading time interval of step 206 has elapsed, and if it has not elapsed, step 207 is executed again. If 0.1 second of the reading time interval has elapsed, the process returns to step 201 and steps 201 to 20 are performed.
7 program is executed.

By executing the program in steps 200 to 208 above, the command value when the coordinate position and auxiliary function are temporarily changed is changed to the symbol X of the machining program shown in FIG.
It is stored as coordinate position data following Y and Z and spindle rotation speed data following symbol S.

Further, in this embodiment, the case of rotating the main shaft as an auxiliary function has been described, but it can also be applied to changing tool data when a tool is replaced and turning on/off the coolant.

In the above embodiment, the conversion into a machining program is performed by the NC program processing device 30, but it may also be performed by the sequence control device 20.

<Effects of the Invention> As described above, in the present invention, when a workpiece is actually machined by a skilled person operating a pulse generator, the coordinate position is read into the numerical control device at a predetermined time interval, and When read, it is determined whether a command operation has been performed to activate an auxiliary function such as rotation of the spindle motor, and if a command operation has been performed, in addition to the coordinate position, the auxiliary function target and its command value are also checked. Since it is converted into a machining program and stored in memory, there is an advantage that the operating state of the auxiliary functions can be memorized when an expert is machining a workpiece.

Another advantage is that the operator does not have to calculate command values, read the machining program, and insert auxiliary function commands into the program.

[Brief explanation of the drawing]

Figure 1 is an overall configuration diagram for clearly demonstrating the present invention, Figures 2-
Fig. 7 shows an embodiment of the present invention, Fig. 2 is an overall configuration diagram of a machine tool equipped with the numerical control device of the present invention, Fig. 3 is a diagram for demolding the spindle override switch, and Fig. 4
The figure is a flowchart showing the operation of the NC program processing device of the numerical control device of the present invention, FIG. 5 is a diagram for explaining the coordinate position during machining of a workpiece, and FIG. The flowchart in FIG. 7 is a part of the machining program list created according to FIG. DESCRIPTION OF SYMBOLS 10... Numerical control device, 20... Sequence control device, 26... Pulse generator, 30... NC program control device, 50... Mashing center, 51, 52
．． 53... Servo motor, 61.62.63... Position detector, W... Workpiece.

Claims (2)

[Claims] (1) Pulses are distributed by operating a pulse generator connected to a numerical control device that drives and controls the motors installed on each axis of the machine tool, and the main shaft, which is rotationally driven by a rotationally controlled main shaft motor, is relatively moved. In a numerically controlled machine tool, the coordinate values of the machining position are detected by a position detector attached to each motor, and the coordinate values of the machining position are stored in the memory as machining data. input means for inputting coordinate values of the machining position detected by the position detector to the numerical control device at predetermined time intervals during machining of the workpiece accompanying movement of the spindle; and control of auxiliary functions such as the spindle motor. an auxiliary function setting means for setting a command; an importing means for taking the setting value set by the auxiliary function setting means; and a processing program for converting the output of the input means and the value taken in by the importing means into a machining program. A numerically controlled machine tool characterized by comprising a conversion means for storing data in a memory. (2) The acquisition means includes command value changing means for temporarily changing the command value of the auxiliary function setting means, and auxiliary function state determining means for determining that the command value of the auxiliary function setting means has been changed. 2. A numerically controlled machine tool according to claim 1, further comprising command value calculation means for calculating a command value when the determination by the auxiliary function state determination means is determined to be a change.