JPS5831410A - Symmetrical numerical controlling system for machine tool - Google Patents

Abstract

PURPOSE:To efficiently and economically control two machine tools by synchronously operating these machine tools by a common numerical controlling program and synchronously executing the symmetrical working to an object to be worked. CONSTITUTION:The column of a main machining center 10 is permitted to move horizontally and a spindle head is permitted to move vertically. In a submachining center 12, a column and a spindle head are permitted to move horizontally and vertically, respectively. A table is permitted to move back and forth. The main and sub-machining centers 10, 12 are synchronously operated by a common numerical control program and execute symmetrical working to an object to be worked.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a control system that simultaneously performs symmetrical numerical control of one machine tool.

Conventionally, when machining a workpiece using a machine tool such as a machining machine, the workpiece is placed on a movable table that can be surrounded.

Generally, a numerical control method is adopted in which the moving table is moved by a predetermined cutting tool in a circle or in a line as appropriate to position it at a predetermined processing position on the machining center t.

However, when performing the same processing on a long workpiece at symmetrical positions on both longitudinal sides of the workpiece, it is difficult to rotate the workpiece on the movable table. Therefore.

In such a case, the machining 17
By arranging 11 machining centers facing each other so that each machining center individually processes a corresponding portion of the workpiece, the workpiece can be easily machined.

Normally, each machining center is equipped with its own numerical control device for automatic operation, but as mentioned above,
In the case of machining the same workpiece using a two-wheel machining center, for example, when machining the same workpiece at symmetrical positions, there are the following problems with the control operation of a one-wheel machining center.

(1) When the machining conditions for the same workpiece are satisfactory, it is desirable for efficiency to operate both machining machines and printers simultaneously, but in this case, it is necessary to synchronize each numerical control device with high precision.

(2) In addition, when the workpiece moves on the symmetrical axis of both machining centers, both machining centers are symmetrical (
Since the actual control contents are the same, it is not desirable in terms of cost to provide an expensive numerical control device to both machining centers.

This is the result of various studies in view of these problems.

When numerically controlling one machining center symmetrically,
A single numerical controller is used, and this numerical controller has both
If all the control programs for the thinning center are stored in one place and both machining centers are operated synchronously using a common command signal when performing symmetrical machining, the control of the machining center will be made easier and the control operation will be more efficient. transformation,
It has been found that it is possible to reduce manufacturing costs and simplify control programs.

Therefore, an object of the present invention is to develop a machine tool that can efficiently and economically control both machine tools when performing symmetrical machining on the same workpiece using one machine tool. To provide a symmetrical numerical control system.

To achieve the above object, the present invention provides a system for numerically controlling nine λ machine tools arranged symmetrically with respect to the same workpiece.

It is characterized by controlling machine tools to operate synchronously and perform symmetrical machining of workpieces at the same time using a common numerical control program.

In the symmetrical numerical control system described above, the controlled object is
, consisting of a column and a table movement axis for each column and spindle head of two machine tools.

First, in this case, one machine tool is the master side, the other machine tool is the slave side, and the numerical control program 2 of the master machine tool is
It is preferable to provide an operation mode conversion function that enables synchronous operation of 12 machine tools and selectively performs master-side operation and nine slave-side operations.

Furthermore, the mode for commanding the movement of the movement axis to be controlled can be composed of an initial positioning command, an inter-finger command, and a circular interpolation command. Embodiments of the control system will be described in detail below with reference to the accompanying drawings.

Figure j1g shows an embodiment in which the system of the present invention is applied to a machine tool. That is, in the Th847 diagram, reference symbols to and is indicate machining centers, and these machining centers 10. A movable table on which a workpiece can be placed is placed between J and J. In addition,
In this *mfl, one side is the main machining center 1.
0, and the other is the secondary 11ii-r thinning center lλ. And Korera's machining center 10. Commonly controlled by a numerical control device/l.

Furthermore, control panels /I and CO0, which can be manually controlled, are attached to Mashie 7 Guse/R10 and 1λ, respectively.

Figure 2 shows the basic configuration of the device shown in Figure 1. The main machining center io has columns on the left and right (two axes).
The spindle head can move in the vertical (Y-axis) direction. In addition, the slave machining center l-
2, the column can move in the left-right (W-axis) direction, and the spindle head can move in the vertical (V-axis) direction.

Then, the table /# can move in one direction (X-axis).

As is clear from FIG. 2, according to the present invention, the control symmetry axes are x, Y, z, , v, w! When the main machining center and the slave machining center are operated synchronously, it is necessary to control all of the axes x, y, z, v, and w to be controlled. Also,
When operating only the main machining center 10, it is only necessary to control the controlled axes x, y, and z. Furthermore, when operating only the slave machining center saw, only the controlled axes X, V, and W need to be controlled. do it.

Next, a symmetrical numerical control system for a machine tool having the above-mentioned configuration will be explained with reference to the model of machining II & -2 shown in FIG. 3 and the 7p-chart of the numerical control system shown in FIG. In the figure, the numerical control system Hiro, the command section JO, the input section 440. Arithmetic section! 0. It is composed of an output section 40. The command unit 30 issues commands to the p1 manual unit UO using a recording medium such as a magnetic tape that stores data or a manual operation panel (keyboard). In this case, control commands for the X-axis, Y-axis, z-axis, vIlb, and W-axis are defined as follows.

X axis → X command Y-axis (V-axis) → Y command 2nd axis (W axis) → 2nd command X, Y supplied from these command unit JO.

2. In the input section 〇, the main machining center 10 and the slave side! Specifies the operation mode of the thinning center, its positioning, and the machining shade.

In this case, the operation mode and machining mode are commanded by a symbol code such as the following 5-order symbol code.

(:1 ,,) (Driving mode) GJo
→ Synchronized operation of the master machining center and slave machining center → Operation of the master machining center only → Slave machining center! Chiseling operation () (machining shade) Code GOl @@ Complementary GO - Circular interpolation (clockwise) GOl Circular interpolation (counterclockwise direction) Note that the symbol code for positioning command is [GQO].

Therefore, the input section 〇 corresponds to the three types of continuous rotation mode commands G 0. Driving mode storage unit 4Iλ that stores Gλ/, G here
and a machining mode command storage unit≠reference for commanding the machining mode. and.

The operation mode storage section stores x, y, and z commands respectively.
Z! L! IQ + VRIQ + WanGf: Bei, t,
``! 9, 7JI % -)'5th grade memory section''4'a
s x * Y * Z commands are memorized respectively.
'XRIG * YBIG * ZRIG tllll
As in lnil, 'x' data analyzed with input s#0,
The y and z commands are sent to the calculation unit IO and are processed as a positioning command (GOo) and a linear interpolation command (GQl).

Based on circular interpolation command ('Go- or GQl).

/? When output is output IX, AY, IZ, AV.

Calculate ΔW. In this way, the calculation section! The data regarding the machining position and machining content obtained in step 0 is supplied to the output unit -〇, and set according to the positioning command [GOO] for the predetermined machining position and the operation mode command [G0゜GJ/, GJ　]. The output section 40 outputs a servo output for controlling each controlled object.

The above explanation is an overview of the numerical control system.

Next, the operation of the control system of the present invention will be explained using a specific example of numerical control.

(1) Axis movement command This line specifies the displacement position or position of each axis of machine motion. There are two methods for specifying the position: a method for specifying the position using absolute coordinate values [absolute mode (command code is Gdel)], and a method for specifying the position using displacement coordinate values [absolute mode (command code is Gdel)].
There is an incremental mode (command code is GP/). The axis movement command includes the previously mentioned positioning command (G
) 0) and 0 straight silver interpolation command [GO7] and 0 circular interpolation command [
G0 Komaku is classified as GOJ).

■Positioning command [aOO] In Fig. 3, when specifying the coordinate value m, the order is as follows.

(1) GfO(gOB-) G2) G 00 XJOo, 000 Y2O
0,000 (ICOB) That is, the command is absolute peak -1' (GtO) ', X-axis JOOwm,
This means that the absolute coordinate value of the Y-axis is positioned.

■ Direct mm command (GO/) In the 1g4 diagram, when specifying linear axis movement from the starting point M to the ending point B, the following is done.

(1) G ri/ (Mol) (J) G O/ XJOo, 000 YJO
o, 000 (Rolm) That is, the command line, incremental shade [Gri/], to the X axis! 00wm
, the axis is moved 300 cm linearly to the Y axis. In addition, the axis movement command to the end point B, absolute mode [
It is also possible to issue a command using [GdeO].

■Circular interpolation command [GOJ or aos] In Figure 7, when moving the axis in an arc from the start point C to the end point, the distance between the start point C of the arc and the center 0 of the arc and the distance p is expressed in the arc center coordinates (1°J). specify. In other words, specify the X component of the distance between the starting point C of the 5-arc and the center 0 as 1.

Similarly, the KY component is designated by J. Therefore, the specified distance is 1m.
Regardless of absolute mode [GO] or incremental mode (GF/), it is expressed as an incremental amount, and the direction of the center with respect to the starting point CK is positive or negative (+,
−) Expressed with a sign.

Therefore, in the case shown in Figure 7, the axis movement specification is as follows (1) Go (Roll) ρ) ao XJOo, 000 '#00,001)
1-70.710 J-70,7IOF/10 (
EOB) In other words, the above command is executed in absolute mode [GOB].
], the arc center locus l1l (I=-70,710wm,
J=-70,710w5) clockwise direction KX
Axis room, y axis wo.

The axis will be moved to the absolute coordinate value of the song. In this case, (F/j0) is the feed speed along one circular arc, /
Specify jags/mkn. Also, in this case, the axis movement command line to the end point, incremental mode [GP/
], it is also possible to issue the following command:

(1) G P / (10B) (,2)07 Xλf, Jri0Y-70,7101-70,71
0J-70,710 Fl! 0 (EOB) (2) Operation mode command Operation mode command line, as mentioned above ■ Synchronous operation command for the main machine and slave machine [GcoO] and Φ Operation command for only the main machine [GcoI] ] and ■ Operation command for slave machine only [G here]
There is.

So ζ % An example of a program for numerically controlling one machine symmetrically by combining these operation mode commands and the axis movement commands.

This will be explained with reference to FIG. Figure 1(a) shows the operation of the master machine, and Figure 1(b) shows the operation of the slave machine.

With respect to changes in the tool length and tool diameter, the tool length and IJL diameter can be corrected by commanding appropriate correction amounts at predetermined operating modes. This can also be done according to the friend numerical control program mentioned above.

As is clear from the foregoing, the present invention is based on a series of programs, and when one machine tool is used to perform symmetrical machining on the same workpiece, the machine tool is ``Synchronized operation and processing at the same timeg
Mt can be achieved. Therefore, it is not only easy to create a control program for the numerical control device, but also the advantage is that the machine tool can be operated efficiently and machining accuracy can be improved.

1+. According to the present invention, it is also possible to manually create a control program and manually operate each machine tool. That is, when creating a control program manually, as shown in the diagram, it is necessary to operate the nine numerical control panels installed on the front of the numerical control device/4 (FIG. 1). On the other hand, during manual operation of each machine tool, Du, I.

It(&), (b)K As shown, it can be operated by a control panel attached to each machining center 10/re-20CN1. These controls 911/
t, JoKFis Generally, various control push button switches and adjustment dial capes required when manually operating a machining center are provided, but especially when the system of the present invention is adopted.

The main side machining center control panel/l includes the main side control Bi
Push button switch i for switching operation between t and slave control panel -〇
tm is provided. Well, the system of the present invention is 2
In order to control the machining centers on the stand symmetrically, it is possible to control the main side machining center and the slave side machining center only with the main side control bit by operating this push button switch/rjLO. It was. In connection with the above, the main control 11 /I has x, y,
Selection dials/IB for the z, v, and w axes are provided, whereas selection dials 20B for the KX, V, and W axes are similarly provided on the inertia control panel 9. Further, the main side control panel/IK is provided with an adjustment dial IRC that can adjust the degree of movement of the seat II system 01F in the axis to be controlled.

The moving speed can be adjusted within the range o, xoo-, assuming the set speed is 100%.

Furthermore, I changed the driving mode according to the original @,
By independently controlling the operation of only the main machine tool or only the slave machine tool, symmetrical and asymmetrical numerically controlled machining of the same workpiece can be easily achieved by 11%.

Although the five preferred embodiments of the present invention have been described above, it is of course possible to make moderate design changes without departing from the spirit of the present invention.

[Brief explanation of drawings]

Figure 1 is a perspective view showing the hardware configuration of a machine tool that implements the system of the present invention, and Figure 1 is a perspective view showing the layout of a machine tool that is symmetrically controlled numerically. The model diagram bjl of the mechanical system that implements the system of the invention is a flowchart diagram of the numerical control system that implements the system of the invention,
FIGS. 5 to 71Q are coordinate diagrams showing axis movements based on axis movement commands of the system of the present invention, in which FIG. 5 is based on a positioning command, 1E6E is based on a linear interpolation command, and I
Figures (a) and (b) show the axis movements in nine cases when one machine tool is controlled numerically symmetrically. Plan view of the operation panel attached to the control device %M10 (
a) and (b) are plan views of a manual control panel attached to one machine tool. ll...Table ll...Numerical control device/
r, ko O-...Control panel 30...Command unit 4A
O... Input section ^... Operation mode storage section IG-3 FIG, I FIG, 2 L Heat, b Y FIG, 8 (b) Building A

Claims (1)

[Claims] (1) In a system that numerically controls one machine tool arranged symmetrically with respect to the same workpiece, the machine tools are operated synchronously by a 1kO numerical control program 2 and the workpiece is A symmetrical numerical control system for a machine tool characterized by controlling so that symmetrical machining is performed simultaneously. (2) In the symmetrical numerical control system according to claim S (1), the controlled object is a machine tool consisting of a column of one machine tool and a movement axis of a counselor and a movement axis of a table relative to each column and spindle head. Symmetrical numerical control system (8) Claims 1 to 9 are the symmetrical numerical control system according to claim 2, in which one machine tool is the main side, the other machine tool is the slave side, and the main machine tool is the main side. A symmetrical numerical control system for a machine tool, which is equipped with an operation mode conversion function that allows one machine tool to be selectively operated synchronously, on the main side, or on the slave side, according to the numerical control program of the machine tool. (4) Recorded in paragraph 1 of the claims and paragraph J of the patent claim.
In a symmetrical numerical control system, the mode for commanding movement of the movement axis to be controlled is a symmetrical numerical control V stem of a machine tool, which is created from an initial O positioning command, a linear interpolation command, and a circular interpolation command.