JPS636606A - Manual synchronizing feed mechanism for numerically controlled tool machine - Google Patents

Abstract

PURPOSE:To perform the interpolating actions of two axes with a command of a single axis by using the pulses produced from a manual pulse generator set to a machine control panel to control a synchronizing feed mechanism. CONSTITUTION:A robot RBT is set to a machine tool LM to carry out the carry-in/out actions of a work, the service actions for replacement of tools, etc. A controller locker CTL contains a numerical controller for the LM and the RBT and a robot controller. Furthermore a CRT MDI board 100 including a CRT display and a keyboard is provided at the front of the CTL together with a tape reader 101, a machine control board 103, etc. At the time of executing a synchronizing feed function mode, the pulse is sent to a processor from a pulse generator 102. Then the processor sends the position instructions to a pulse distributor for selected two axes. Thus the linear or arc interpolation is carried out.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a manual synchronous feed mechanism for numerically controlled machine tools;
In particular, the present invention relates to a manual synchronous feed mechanism for a numerically controlled machine tool that allows synchronous feeding of two axes of the machine tool using a manually operated handle.

(Prior art) In order to require high machining accuracy and productivity, many recent machine tools are controlled by numerical control devices. The control device controls the operation of the machine tool, and based on machining data stored in a single paper tape, bubble memory, read-only memory, etc., the workpiece can be machined with high precision and the desired number of identical pieces. It is something that can be processed in large quantities.

On the other hand, users sometimes request that only a small number of products be mass-produced with partially different processing, or that only a small number of products be processed such as partial chamfering or corner H. You may be asked to do something.

(Disadvantages of conventional devices) In order to meet such user requests, the number (/i control device) is a machine tool that converts part of the machining program stored in the bubble memory into the shape requested by the user. It is possible to process a specific product by creating a new program with partial modifications and processing the work using the program, but it takes a lot of time to modify the program. It is also possible to input the machining data for the positions where partial machining is to be performed sequentially through manual data input or the panel and perform the machining one by one, but this also requires time and effort and is not a good idea. No, no.

The present invention aims to improve the above-mentioned conventional drawbacks, and its purpose is to provide a numerically controlled machine tool that can automatically perform a part of machining on a workpiece in two-axis rotation under manual control. The purpose is to provide a new device.

(Means for Solving the Problems) In order to achieve the above-mentioned objects, the present invention provides a single system in a numerically controlled machine tool capable of freely controlling synchronous feed of a plurality of axes.
A manual operation means that controls the synchronous feed of a machine tool by emitting pulses at a speed proportional to the speed of manual operation and a number proportional to the amount of manual operation, and a position command according to the number and speed of pulses emitted by the manual operation means. a pulse distributor that executes a pulse distribution operation based on the input position command and distributes synchronization pulses to the at least two axes; and at least two axes controlled by the distribution of the synchronization pulses. A manual synchronous feed mechanism for a numerically controlled machine tool is provided, characterized in that it has a servo control circuit for a machine tool axis.

(Function) Turn on the manual data input panel or manual synchronous feed processing function switch 1 to set the numerical control device to r synchronous feed function mode 1. With this operation, the numerical control device is controlled when two axes are rotated using an external signal. This is the synchronous feed control mode where the two axes will operate.
After selecting linear interpolation or circular interpolation, input the data necessary for the interpolation operation.

1 When performing 1 synchronous feed function mode, when a pulse is sent to the processing device from a means for generating pulses as an external signal, such as a manual pulse generator, position commands for the two selected axes are sent as pulses from the processing device. sent to the distributor. Thereby, the pulse distributor can output an interpolation signal to the servo circuit to manually perform linear interpolation or circular interpolation.

Note that the speed of interpolation depends on the speed of pulses applied to the processing device from an external source, such as a manual pulse generator.

(Example) Next, one embodiment of the present invention will be described in detail using the drawings.

FIG. 1 shows an embodiment in which the present invention is applied to a machine tool with a robot.

In the figure, LM is a machine tool. The RBT is a robot attached to the machine tool LM, and performs services such as loading/unloading workpieces of the machine tool LM, exchanging tools, and cleaning up chips. CTL is a control device rocker, and incorporates a numerical control device (described later) that controls the machine tool LM and the robot attached thereto, and a robot control device that directly controls the robot RBT. In addition, the control device rocker C
On the front of the TL, there is a CRT-MDI panel 1 equipped with a CRT display and a manual data input section with a keyboard for inputting data into the control device.
00, tape reader 101, manual pulse generator 102,
A machine operation panel 103 including a bubble memory adapter HMA and operation switches for various machines is provided. WF is a work feeder. It should be noted that since the robot RBT and the work feeder WF are not directly related to the explanation of the present invention, detailed explanations thereof will be omitted.

FIG. 2 is a circuit block diagram for realizing this embodiment.

In FIG. 2, NC is a numerical control device for controlling the machine tool LM. This number (BU in the control device NC)
SN is a bus line, and has an address bus for transferring address signals and a data bus for transferring data. W.M.
N is a working memory consisting of a high-speed volatile RAM, which temporarily stores processed data read out from the non-volatile data memory DMN. PMN is a control program memory that stores control programs, MF
The UN is a processing device such as a microprocessor, and executes various processes such as numerical control processing, editing processing, and data transmission/reception processing based on the control program and part program.

PDN is a pulse distributor, which receives position commands x, Y, and Z, executes known pulse distribution calculations based on commands from the processing device MpuN, and distributes pulses X', Yr, and Zr, as well as manual operations described later. Even when operating the machine tool LM, a known pulse distribution calculation is executed to distribute the pulses XP, YP, and ZP.5VNX, 5VN
Y and 5VNZ are the servo control circuits of the machine tool LM, respectively, and the distribution pulse X? , Yp, ZF, and a feedback pulse Xf generated every time the motor rotates a predetermined amount.

Input X f, Z f, IX p-X fl
, IY p-Ypl, tz p -z 6, DX, DY, and DZ are control circuits for driving the x-axis, Y-axis, and Z-axis, respectively, and DMX, D
MY, DMZ are DC motors for driving the X-axis, Y-axis, and 2-axis, respectively, PCNX, PCNY, and PCNZ are DC motors DMX, DMY, and DMZc7) axes whose rotations are controlled by the control circuits DX, DY, and DZ. This is a pulse coder that is attached to the DC motor and generates feedback pulses Xf, Yf, and Zf every time these DC motors rotate by a predetermined amount. In addition, servo circuits 5VNX, 5VNY, SVN:
l:, DC motor 4! 'DMX.

DMY, DMZ and pulse coders PCNX, PCNY
, PCNZ constitute a servo unit, and Xp-
Servo control is performed so that Xf, Yp-Yf, and Zp-Zf are all zero. The HMA is a bubble memory adapter that reads the Canadian program stored in the bubble memory cassette and transfers it to the working memory WMN.
is the operation panel, and the CRTΦMDI! 9.100
is the same as The DTN is a data transceiver that communicates with the robot RBT. RC is a robot control device.

The PCN is a high-power circuit and serves as an interface between the controller NC and the machine tool LM. That is, the signal DOM such as the auxiliary machine 71i (M machine running) command and the spindle rotation (S function) command is output as a contact signal to the machine tool side, and the machine tool side finishes the work in response to the auxiliary machine running command and the main spindle rotation command. Then, a completion signal DIM etc. is output to the path line as a contact signal.

The present invention uses a manual pulse generator 102 provided on the machine operation panel 103, and uses the pulses generated from this to control the synchronous feed 41 fE, thereby converting the command from the manual pulse generator for one axis into two axes. This is an attempt to perform an interpolation operation.

Although the manual synchronous feeder run according to the present invention includes both linear interpolation and circular interpolation, manual linear interpolation will be described first.

First, to explain the manual operation of a normal numerically controlled machine tool, a mode selection switch (not shown) provided on the machine operation panel 103 is switched to, for example, the HANOLE" position, and the manual pulse generator 102 is used to manually operate the machine. When the axis to be operated is selected using an axis selection switch (not shown), the numerical controller NC becomes i''HANOLE feed mode j. When the manual pulse generator 102 is rotated in the right direction in this state 7E, the selected axis moves in the earth direction,
Rotating to the left rotates the selected sleeve in one direction.

When the manual pulse generator 102 is rotated, one pulse is generated for each division attached to it, and the selected axis moves by 0.001 mm.

This manual axis movement operation is executed only for the l-axis.

In the present invention, the numerical control device NG is operated using the rHNDLJ or r'rHNo.
Input t and J (Figure 3, Stage 2).

By inputting these commands, the numerical control device NC enters the "periodic feed mode 1" and receives an external signal, that is, the machine operation Blo.
The cyclic feed control can now be performed only by pulses sent from the manual pulse generator 102 provided at No. 3. To select this 1 synchronous feed function mode 1, instead of inputting characters from the keyboard,
200 may be provided with an on-off switch to specify rHNDLJ and rTHNDLJ.

Next, select whether the operation in "r synchronous function sending mode" is linear interpolation or circular interpolation (step 2 in FIG. 3). In this selection, if linear interpolation is selected using the keyboard provided on the CRT-MDI board 100. Enter rDIRMJ to select circular interpolation, and enter rc:IRMJ to select circular interpolation. In this case, we choose linear interpolation, so rDI
Enter RMj.

After this, select the plane that will move the two axes simultaneously (
Figure 3 Step 3), this selection is for CRT/MDI board 1
r)IsYNOJ using the keyboard provided in 00
It is determined by the combination of and rH3YNI J.

Note that this combination is as shown in FIG. Note that this combination allows you to use CR instead of inputting characters from the keyboard.
T-MDI board 100 Ni rHsYNOJ and rH9YNI
An on/off switch for specifying J may be provided, and the plane may be selected by a combination of these switches.

Finally, the interpolation angle is specified using the keyboard provided on the CRT-MDI board 100 (step 4 in FIG. 3). This input specifies the angle of the selected plane from the reference axis in BCD. Note that this angle specification is performed by rotating counterclockwise from the angle specification reference axis in the child direction on the selected plane, as shown in Figure 5.
One direction is clockwise.

By inputting the above data to the numerical control device.

The l-axis manual pulse generator performs two-axis linear interpolation ri[
(Step 5 in Figure 3).

For example, in FIG. 4, rHsYNOl = 1,
rH3YNI J = O is selected, the angle specification reference axis is the X axis, the manual pulse generator 102 is rotated, and the pulses emitted from this are input to the processing device MPUN.
The processing device MPUN calculates the amount of Y-axis movement according to the angle data stored in the working memory WMN and the speed of the input pulse (for X-axis movement), and
UN sends the position commands X and Y according to the specified angle to the pulse distributor PDH, and the pulse distributor PDN sends them to the processing device M.
Based on the command from PUN, a known pulse distribution calculation is executed to distribute the buses Jl/XP, YF and input them to the servo control circuits 5VNX and 5VNY. Then, linear interpolation on two axes, the X-axis and the Y-axis, can be performed.

Next, 1-manual circular interpolation using the 1-manual intermittent feed function will be explained.

CRT@MD I board 100yo 4J rHNDLJ again 1
After specifying i rTHN [lL j and setting the numerical controller NC to r synchronous feed function mode 1, the CRT/MDI board t
o.

Using the keyboard provided in the circular interpolation “cIRMJ
(Step 1.2 in Figure 3).

After this, select the operating plane that operates the two axes simultaneously (step 6 in Figure 3).
Use the keyboard provided on board 100.rc:5YNO
J and rcsnn J 17) The union will be decided. Note that this combination is as shown in FIG. In addition, this combination can be used instead of manually inputting characters from a keyboard.
-MDI board 100 rcsYNO” and rcsYNI J
As in the case of linear interpolation, it is possible to provide an on/off switch for specifying and select a plane by a combination of these switches.

Next, specify the rotation direction of circular interpolation (CW or CCW) using the keyboard provided on the CRT-MDI board 100.
(Step 7 in FIG. 3). This rotation direction designation differs depending on whether the coordinate system is a right-handed coordinate system or a left-handed coordinate system, as shown in FIG.

That is, in right-handed coordinates, the clockwise rotation is rR
cW J, r for counterclockwise rotation RC:C:WJ
, and when rotating clockwise in left-handed coordinates, rL
lll; W J, r L (1:
Specify CWJ.

Next, the machining radius value from the machining start point to the center of the machining arc is input in BCD (step 8 in FIG. 3).

By inputting the above various data to the numerical control device Nc, 1
The circular interpolation of the two axes is turned into a rotation by the manual pulse generator of the axes (Step 9 in Fig. 3).

If it is, Fig. 6 nioiite, r (ZSYNOJ = 1
, rcsYNI J = 1, the angle specification reference axis is set to Z, the manual pulse generator 102 is rotated, and the pulses generated from this are input to the processing device MPUN, the processing device wMPUN is in the working state. Memory WMN
The processing unit MPUN determines the amount of movement of the X-axis according to the various data stored in and the speed of the input pulse (the amount of movement of the Z-axis), and the processing unit MPUN sends position commands x and z according to the specified angle to the pulse distributor PDH. and the pulse distributor PDN is the processing unit a
A known arc pulse distribution calculation is executed in response to a command from MPUN to distribute pulses XP and ZP and input them to servo control circuits 5VNX and 5VNZ. Then, circular interpolation on two axes, the X-axis and the Z-axis, can be performed.

(Effects of the Invention) As described in detail above, the present invention provides that when executing the synchronous feed function mode, when a pulse is sent to the processing device from a means for generating a pulse as an external signal, such as a manual pulse generator, the processing Position commands for the two axes selected from the device are sent to the pulse distributor, and linear interpolation or circular interpolation can be performed manually, so even numerically controlled machine tools whose motto is automatic operation can be used. , straight line or circular arc ζ1 machining can be performed as if it were a manually controlled machine tool. Moreover, this machining operation only requires operating one manual pulse generator, and since this machining is performed according to preset data, it has many advantages such as easy operation of the machine tool. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a machine tool implementing the present invention, FIG. 2 is a circuit block diagram of an embodiment of the present invention, FIG. 3 is an operation flowchart, and FIG. 4 is an explanatory diagram illustrating the operation of selecting an operation plane. FIG. 5 is an explanatory diagram for explaining the angle designation operation, FIG. 6 is an explanatory diagram for explaining the selection operation of another operating plane, and FIG. 7 is an explanatory diagram for explaining the rotation direction designation. LM Fighting Machine Tools CTL Kaisha Machine Tool Locker, 100- Fighting CRT Fist MDI! 8. 102... L-motion pulse generator, NG... Number I'1 control device, 5VNX, 5VNY, 5VNZ--servo circuit, DX,
DY, DZ fist control circuit, PC: NX, PCNY, PCNZ@-Pa) Lt Sml
-da, MPUN-4 processing unit.

Claims (4)

[Claims] (1) Synchronous feed of multiple axes In numerically controlled machine tools that can be statically controlled, manual operation controls the synchronous feed of the machine tool by emitting pulses at a speed proportional to the speed of manual operation and a number of pulses proportional to the amount of manual operation. means for issuing a position command to a pulse distributor according to the number and speed of pulses issued by the manual operating means; and means for executing a pulse distribution operation based on the input position command and synchronizing the at least two axes. A manual synchronous feed mechanism for a numerically controlled machine tool, comprising: a pulse distributor that distributes pulses; and a servo control circuit for at least two machine tool axes controlled by the distribution of synchronous pulses. (2) The pulse distribution operation according to the input position command is a linear interpolation operation.
Manual synchronous feed mechanism for numerically controlled machine tools described in ). (3) The pulse distribution operation according to the input position command is a circular interpolation operation.
Manual synchronous feed mechanism for numerically controlled machine tools described in ). (4) The manual operation means for controlling the synchronous feed of the machine tool by emitting pulses proportional to the speed of the manual operation is a manual pulse generator of the machine tool, as described in claim (1). manual synchronous feed mechanism for numerically controlled machine tools.