JPH07185901A - Superposition processing control method and numerical control apparatus thereof - Google Patents

Abstract

(57) [Summary] [Object] To provide a simultaneous machining control method and a numerical control device capable of performing simultaneous machining by an inexpensive one-system control numerical control device having no superposition control function. [Structure] In order to machine the workpieces WP1 and WP2 of two spindles at the same time, from the movement command of the Z ₁ axis of the tool post 7 and the Z ₂ axis of the second spindle, and the movement speed of the Z ₁ axis and Z ₂ axis. The calculated synthetic speed is commanded by one block of the linear interpolation command of the machining program.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-system control numerical control device in which tools are prepared for a plurality of headstocks.

[0002]

2. Description of the Related Art Conventionally, a numerically controlled lathe (which has the same basic structure as that of the embodiment of the present invention, will be described with reference to FIGS. 1 and 2) has a bed 1 and a bed 1. A first headstock 2 is fixedly mounted on the top of the first headstock 2.
A first main spindle 3 is rotatably driven.

A second headstock 4 is provided on the bed 1 so as to move toward and away from the first headstock 2 in such a manner that it can be moved and driven in the direction of the main shaft axis (referred to as Z ₂ axis). A second spindle 5 is provided on the second spindle stock 4 such that the second spindle 5 is rotatably driven in a form in which the shaft center is aligned with the first spindle 3.

Further, a tool rest 6 is provided on the bed 1 in the direction of the main axis (Z ₁ axis) and in the direction perpendicular to the main axis (X 1).
It is provided so as to be movable and driven. And
A turret 7 is rotatably driven on a turret 6 in a plane perpendicular to the spindle axis, and a plurality of tools T1, T2, ... It is provided in a form corresponding to the main shaft 5.

FIG. 2 is a block diagram showing the configuration of a control device for a numerically controlled lathe. 10 is a control program memory 1
1 is a processor that controls the entire control device according to a program stored in 1. The control program memory 11 is
It is possible to mount a multiple system control function capable of superposing a plurality of machining programs and a superposition control function.
Reference numeral 12 is a control data memory that stores various data during processing, input / output signals, and the like, 13 is a user memory that is a storage unit for user input data, such as a machining program storage unit that stores a machining program, and 14 is a machining program. CRT such as a machining program displaying means for displaying, etc., 15 is an interface for converting an output signal from the processor 10 into a signal for display and sending it to the CRT 14, 16 is a keyboard for inputting information, 17 is a keyboard 16 A keyboard interface that outputs an input signal to the processor 10, 18 receives an axis movement command from the processor 10, and outputs an axis movement instruction to a servo amplifier 19, and an axis control circuit 19 receives the movement instruction to perform machining. Servo amplifier for driving the servomotor of machine (numerical control lathe) 21, 20 Receiving the output signal from processor 10, it processes the signal and controls the machine tool 21, also receives a state signal from the machine tool 21, a PMC for transferring a signal needed for the processor 10. The above components are connected to each other by a bus line 22.

When the workpiece WP is machined by the above numerically controlled lathe, the processor 10 reads the machining program from the user memory 13, analyzes the contents of the machining program, and instructs the axis control circuit 18 and the PMC 20. Is output to operate the machine tool 21.

In a numerically controlled lathe having a first spindle 3, a second spindle 5, and a tool rest 6 facing each other as shown in FIG. 1, a workpiece WP is loaded on the first spindle 3 in accordance with a command of one machining program. The tool rest 6 is driven and controlled while being held, and one side of the work WP is processed (first step),
Next, the work WP is transferred from the first spindle 3 to the second spindle 5, and the work WP is held on the second spindle 5 (2
The second spindle 5 and the tool rest 6 are drive-controlled by the dashed line) to perform the other machining (second step) of the work WP 1.
System control is performed.

At this time, in the case where the first and second steps are overlapped, the second spindle 5 is moved in accordance with the movement of the tool rest 6 for performing the first step (the second spindle 5 and The state where the turret 6 is not relatively moved), and the second
It is necessary to move the second spindle 5 to perform the process of the process. That is, the movement of the second main spindle 5 is the movement for performing the machining in the second step and the movement of the tool rest 6 in addition.
Such processing is hereinafter referred to as superposition processing. In the superposition machining, since the movement command and the feed speed command for each of the first process and the second process must be instructed at the same time, the machining cannot be performed by the single system control, and the control program memory 11
Is equipped with a multi-system control function capable of superimposing a plurality of machining programs and a superposition control function, and the first step and the second step
Machining was performed by simultaneously executing the machining program of the process using the superposition control function.

[0009]

However, although the above-described numerical control device for one-system control is inexpensive, it is not possible to perform superposition processing, and a numerical control device having a multi-system control function or a superposition control function cannot perform simultaneous processing. However, there is a problem that it is necessary to mount such an expensive function for that purpose.

In consideration of such problems of the conventional numerical control apparatus, the present invention is a superposition processing control method capable of performing superposition processing by an inexpensive one-system control numerical control apparatus having no superposition control function. And a numerical controller.

[0011]

The present invention according to claim 1 is as follows.
A superposition machining control method for a machine tool controlled by system control, in which a command to distribute the commanded feed composite speed to the feed speed of each axis according to the ratio of the movement amount of each axis and a command to the first spindle. From the movement command of at least one axis for machining the held work, the movement command of at least one other axis for machining the work held by the second spindle, and the feed rate of each of these axes, This is a superposition machining control method in which a feed composition speed calculated according to a predetermined feed composition rule is commanded in one block of a machining program.

According to a second aspect of the present invention, in a numerical control device for a machine tool controlled by one-system control, a machining program storage means for storing a machining program for machining a workpiece held on a first spindle, A feed rate of at least one axis for machining a workpiece held on the first spindle,
And feed composition speed calculating means for calculating the feed composition speed according to a predetermined feed rate composition rule from the feed rate of at least one other axis for machining the workpiece held on the second spindle, and the calculated feed. A combination speed, a movement command of at least one axis for machining a work held by the first spindle, and a movement command of at least another axis for machining a work held by the second spindle, Program editing means for editing the stored machining program so that the commanded feed composite speed is distributed to the feed speed of each axis in accordance with the ratio of the movement amount of each axis in one block. Is a numerical controller equipped with.

[0013]

According to the present invention, a distribution command for distributing the commanded feed speed to the feed speed of each axis in accordance with the ratio of the movement amount of each axis,
A movement command of at least one axis for machining the work held by the first spindle, a movement command of at least one other axis for machining the work held by the second spindle, and a movement command of each of those axes. The feed composite speed calculated from the feed speed is commanded in one block, and the work held by the first spindle and the work held by the second spindle are superposed.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing its embodiments.

FIG. 1 is a schematic configuration diagram of a numerically controlled lathe equipped with a numerical controller according to an embodiment of the present invention. or,
FIG. 2 is a block diagram of the numerical control device. Here, the control program memory 11 of FIG. 2 stores an editing means for editing a machining program for machining one work WP so that two works can be superposed. Further, the processor 10, the control program memory 11, the control data memory 12 and the like constitute a combination speed calculation means and a program editing means, and the user memory 13 constitutes a machining program storage means (for the configuration, The description that is the same as the description in the example is omitted). In such a numerically controlled lathe, workpieces WP1 and WP2 are attached to both spindles 3 and 5 (see FIG. 3 (a)), and these workpieces W are moved by the tool rest 6.
When processing P1 and WP2 in a superimposed manner, for example,
The front and rear surfaces of the turret 7 are fixed with the drills T1 and T2 so as to be coaxial with each other in the direction of the spindle axis.
When performing the same drilling process on the workpieces WP1 and WP2 as shown in (b), the movement amount of the Z ₁ axis (turret 6) is 7
If 0.0 mm, the relative movement amount of the Z ₂ axis (second main spindle 5) with respect to the Z ₁ axis also needs to be 70.0 mm, so the movement amount of the Z ₂ axis is

[0016]

[Number 1] (Z ₂ axial movement amount) = (Z ₁ axis movement amount) + (relative movement amount with respect to Z ₁ axis Z ₂ axes) = 70.0 + 70.0 = as in 140.0Mm, Z ₁ It is a value obtained by adding the relative movement amount of the Z ₂ axis to the Z ₁ axis to the movement amount of the axis.

If the first spindle 3 and the second spindle 5 have the same rotational speed and the Z ₁ -axis feed rate is 1.0 mm / rev, Z ₁
Since the axis Z ₂ axes while moving 70.0mm must move 140.0Mm, feed speed of the Z ₂ axes,

[0018]

[Formula 2] (Z ₂ -axis feed rate) = (Z ₂ -axis movement amount) / (Z ₁ -axis movement amount) x (Z ₁ -axis feed rate) = 140.0 / 70.0 x 1.0 = 2. Like 0 mm / rev, it must be a value obtained by multiplying the Z ₂ -axis movement amount by the Z ₁ -axis movement amount and multiplying the Z ₁ -axis feed rate by the multiplication rate.

In order to perform these superimposed movements by one-system control, in addition to the Z ₁ -axis movement command and the feed speed command in the machining program, the Z ₂ -axis movement command and the feed speed command are also set to 1.
Although it must be commanded within a block, only one feed rate can be commanded within one block.

However, the linear interpolation function of the numerical controller has the following features.

For example, as shown in FIG. 5, in the orthogonal coordinate system of the X axis and the Z ₁ axis, the tool cutting edge 8 is X 0, Z ₁₀ (X
When in the position of the axis origin and Z ₁ axis origin), by moving the tool rest 6 tool edge 8 X-50.0 mm, Z ₁ -100.
The 0mm position, when the spindle moves obliquely 1.0mm proceeds speed during one rotation, in a machining _{program, G1 X-50.0 Z 1 -100.0} F1.
It is sufficient to instruct a block called 0 ;. In the above command, G1 is a command for linear movement at a feeding speed instructed, X-50.0, Z ₁ -100.0 is the tool nose 8 X
Position of -50.0mm on the axis, -100.0Mm on Z ₁ axis
Is a command to move the position to F, and F1.0 is a command for the feed rate.

At this time, the numerical controller regards each axis commanded to the G1 block as an orthogonal coordinate axis, and distributes the commanded feed speed to the feed speed of each axis in accordance with the ratio of the movement amount of each axis. The feature is that linear interpolation calculation is performed. Therefore, in the case of FIG. 5, linear interpolation calculation is performed to distribute the diagonally moving feed rate of 1.0 mm / rev to the feed rates of the Z ₁ axis and the X axis as described below.

[0023]

[Formula 3] (diagonal movement amount) = √ ((Z1 axis movement amount) ² + (X
Axial movement amount) ² ) = √ (100.0 ² +50.0 ² ) = 111.803398874 ... mm Also, (Z ₁ axis feed rate): (command feed rate) = (Z ₁ axis movement amount): (oblique) Movement amount) (X-axis feed rate): (command feed rate) = (X-axis movement amount): (diagonal movement amount) Therefore, (Z ₁ -axis feed rate): 1.0 = 100.0: 111.8
0339874 ... (X-axis feed rate): 1.0 = 50.0: 111.803
From 398874 ..., the feed rate of each axis is (Z ₁ axis feed rate) = 0.894427191007 ... m
m / rev (X-axis feed speed) = 0.4472135595503 ... mm
It becomes / rev. The numerical control device controls the servomotor of the machine tool 21 so that each axis has the distributed feed speed.

Focusing on such a feature, when it is desired to instruct a plurality of feed rates in one block, it is sufficient to instruct a combined feed rate. Therefore, in the example of FIG. 3 described above, the feed rate such that the result of the linear interpolation calculation is (Z ₁ axis feed rate) = 1.0 mm / rev (Z ₂ axis feed rate) = 2.0 mm / rev It suffices to back-calculate, and to command the movement command of the Z ₁ -axis and Z ₂ -axis and the backward-calculated feed speed to the G1 block. Therefore, the commanded feed rate is calculated by the prescribed feed rate composition rule shown in (Equation 4).

[0025]

[Formula 4] (command feed speed) = √ ((Z _1- axis feed speed) ² +
(Z ₂ -axis feed rate) ² ) = √ (1.0 ² +2.0 ² ) = 2.23606797749 ... mm / rev, the feed rate of the Z ₁ -axis and the feed rate of the Z ₂ -axis are combined. Ask for.

The moving amounts of the Z ₁ axis and the Z ₂ axis are 70.0 each.
mm and 140.0 mm, so if the incremental command for each axis is to be W and H, G1 W-70.0 H-140.0 F2.236
It suffices to command the block 1 ;. When this command is executed, the tool rest 6 moves 70.0 mm toward the first spindle 3 side,
Meanwhile, the second main spindle 5 also moves 140.0 mm toward the first main spindle 3. Therefore, the relative amount of movement of the tool rest 6 and the second main spindle 5 is 70.0 mm, which is the same as the amount of movement of the tool post 6 toward the first main spindle 3 side, and the same drilling is performed on the works WP1 and WP2. It can be carried out.

As another example, as shown in FIG. 4, when the relative movement amount of the second spindle 5 side with respect to the tool rest 6 is halved on the first spindle 3 side, the movement amount of the Z ₁ axis is 70. 0mm so, the amount of movement of Z ₂ axes from (Equation 1) is, (Z ₂ axial movement amount) = 70.0 + 35.0 = 105.0mm Further, 1.0 mm feed rate of Z ₁ axis similarly to FIG. 3 Assuming / rev, the Z ₂ axis feed rate from (Equation 2) is (Z ₂ axis feed rate) = 105.0 / 70.0 × 1.0 = 1.5 mm / rev, and from (Equation 4) The commanded feed speed is (command feed speed) = √ (1.0 ² +1.5 ² ) = 1.8022775363773 ... mm / rev. Therefore, G1 W-70.0 H-105.0 F1.802
8; if you order the block, the tool post 6 on the second spindle 5 side
It is possible to perform superposition processing in which the amount of movement relative to is half the amount of movement on the first spindle 3 side.

Next, regarding the numerical control device for automatically editing the machining program by automatically performing the above-mentioned calculation,
A description will be given with reference to the drawings.

FIG. 6 is a flow chart showing the flow of automatically editing the machining program of the workpiece WP1 on the first spindle 3 side in the numerical control apparatus of the above embodiment into the above-mentioned superposition machining program. In addition, FIG. 7 (a) is shown in FIG. 3 (a).
From the state in Fig. 7, a part of the machining program that processes only the workpiece WP1 on the first spindle 3 side and returns to the X-axis origin return after the machining is completed. Fig. 7 (b) shows the machining program automatically. The work WP2 on the side of the second spindle 5 in FIG. 3 is edited so that the work can be superposed.

In FIG. 6, first, on the screen for editing the machining program, a machining program for the workpiece WP1 on the first spindle 3 side in the overlapping machining is created, or if already created, the machining program is called (step S1). ).

Next, when the edit switch for instructing the machining program to automatically edit the machining program is pressed (step S2), a message for designating the editing range is displayed on the screen. Therefore, the cursor is moved to the edit start block of the machining program and the start position switch is pressed, then the cursor is moved to the edit end block and the end position switch is pressed to specify the range of the block to be superimposed processed (step S3). For example, FIG.
In, the blocks (1) to (3) are designated as the editing range.

[0032] Following the editing range is specified, the message requesting the input of a ratio of the first movement amount of the spindle 3 side and the amount of movement of the second main shaft 5 side is displayed on the screen, the Z ₁ axis When the movement amount is 1, the ratio of the relative movement amount of the Z ₂ axis to the Z ₁ axis is input (step S4). For example, as shown in FIG. 3, if the same relative movement amount with respect to Z ₁ axis movement and Z ₂ axes Z ₁ axis, the ratio is 1: Since 1 1
Enter. Further, the amount of movement of the Z ₁ axis as shown in FIG. 4 and Z ₂
If the ratio of the relative movement amount of the axis to the Z ₁ axis is 2: 1, enter 0.5.

After that, when the execution switch is pressed, automatic editing is started, and when it is desired to re-input the editing range and the work size ratio, the return switch is pressed to return to the processing of step S2 (step S5).

In the process of step S5, when the execution switch is pressed, the following process is started.

First, in the designated edit range, a block having a Z ₁ -axis movement command is searched in order from the edit start block (step S6). If there is no block, the process is terminated. It is determined whether each axis is a command block for moving at the maximum feed speed) block or G1 block (step S7). In FIG. 7A, since there is a Z ₁ -axis movement command (W-70.0) in block (1), the process proceeds from step S6 to step S7, and block (1)
Is a G1 block, the process proceeds from step S7 to step S8.

If the block is the G1 block in the process of step S7, the feed speed of the block is stored (step S8). Block (1) of FIG. 7 (a)
Is memorized because it is commanded to be F1.0.
If the block has no feed rate command, the immediately preceding command for the feed rate is retrieved and stored. However, when the feed speed commanded immediately before is a command that has already been changed for superposition processing, the feed speed before the change is stored. Next, the feed rate and the movement amount of the Z ₁ axis are obtained (step S9). In block (1) of FIG. 7 (a), since there is only a Z ₁ axis movement command, the commanded feed speed becomes the Z ₁ axis feed speed as it is, and the Z ₁ axis movement command is an incremental command. Therefore, the command directly becomes the movement amount of the Z ₁ axis. However, if there is a movement command of the axes other than Z ₁ axis that block calculates the feed speed of the Z ₁ axis from the commanded feed speed is distributed to the Z ₁ axis Z ₁
Calculate the axis feed rate. Also, the difference in the case the movement command of the Z ₁ axis is absolute command (end-of-travel position command), and end positions of the Z ₁ axis immediately before by the movement command of the Z ₁ axis commanded immediately before, this absolute command To calculate Z ₁
Calculate the movement amount of the axis.

Next, according to the value input in the process of step S4, a Z ₂ axis movement command is added to the block,
The feed rate is changed (added if there is no feed rate command) (step S10). For example, when input in the processing of step S4 is 1, with respect to (1) in FIG. 7 (a), the amount of movement of Z ₂ axes from (Equation 1) is, (Z ₂ axial movement amount) = 70.0 + 70. Since 0 = 140.0 mm, H-140.0 is added, and from (Equation 2), Z
_{The 2-} axis feed rate is (Z ₂ -axis feed rate) = 140.0 / 70.0 x 1.0 = 2.0 mm / rev, and the feed rate commanded from (Equation 4) is (command feed rate) = √ (1.0 ² +2.0 ² ) = 2.23606797749 ... mm / rev, so change the commanded feed speed to F2.2361, and edit automatically as shown in (11) of Fig. 7 (b). To do.

On the other hand, when the block is the G0 block in the process of step S7, the movement amount of the Z ₁ axis is obtained in the same manner as step S9 (step S11).

Next, the G0 command of the block is changed to the G1 command, and the Z ₂ axis movement command and the feed speed command are added to the block according to the value input in the process of step S4 (step S12). For example, step S
The input in the process of 4 is 1, the maximum feed rate per minute of the Z ₂ axis is 10.0 m / min, and the spindle speed at this time is 2
In the case of 00.0 rpm, G (2) in FIG.
0 Change in G1, the amount of movement of Z ₂ axes from (Equation 1), since the (Z ₂ axial movement amount) = 70.0 + 70.0 = 140.0mm, Add H140.0. The ratio of the feed speeds of the Z ₁ axis and the Z ₂ axis is the ratio input in the process of step S4, the Z ₂ axis must be faster, and the block (2) is the G0 block. , Z ₂ Find the maximum feed rate for the axis. The maximum feed rate per minute of the Z ₂ axis is 10.0 m / min, and the spindle speed at this time is 200.
Since it is 0 rpm, the maximum feed rate of the Z ₂ axis at this time is (Z ₂ axis feed rate) = (maximum feed rate of Z ₂ axis per minute) / (spindle speed) = 10000.0 / 200 0.0 = 50.0 mm / rev, and from the formula in which the Z ₁ axis and Z ₂ axis of (Equation 2) are interchanged, Z
Feed speed of _one axis is a (Z ₁ axis feedrate) = 70.0 / 140.0 × 50.0 = 25.0mm / rev, hence, the feeding speed of command from the equation (4) (Directive (Feeding speed) = √ (25.0 ² +50.0 ² ) = 55.9016994374 ... mm / rev, so add F55.9017 and edit automatically as shown in (22) of FIG. 7B. .

Thereafter, the next G1 block is searched for both the Z ₁ axis movement command and the feed velocity command (step S13). If both are not present, the feed velocity command stored in the processing of step S8 is searched. Add to the block (step S14). For example, 1.0 stored in (1) is added as F1.0 to (3) in FIG.
Editing is performed as shown in (33) of FIG. 7B. In the process of step S14, even if the command of the feed speed of the previous block is changed in the block that moves at the feed speed instructed by the previous block, as in the block (3) of FIG. This is a process for moving the block at the feed speed before the change of the previous block.

In the process of step S13, if at least one of them is instructed, or after the process of step S14, the process returns to the process of step S6 until the movement command block of the Z ₁ axis disappears within the editing range. The processing from S6 to step S14 is repeated.

If the machining program edited by this series of processes is executed, the workpieces WP1 and WP2 mounted on the first spindle 3 and the second spindle 5 can be superposed.

As described above, 1 which does not have the superposition control function
An inexpensive numerical controller for system control can perform superposition processing of the first step and the second step, and does not require an expensive numerical controller having a multiple system control function or a superposition control function.

In the above embodiment, the composition of only the velocities of the Z ₁ axis and the Z ₂ axis is explained, but the invention is not limited to this. For example, when the block also has an X axis movement instruction, The feed rate to be set is (command feed rate) = √ ((X-axis feed rate) ² + (Z _1- axis feed rate) ² + (Z ₂
(Axis feed speed) ² ) As shown in ( ² ), the feed speeds of the X-axis, Z ₁ -axis, and Z ₂ -axis are combined and obtained. Further, even if there are movement commands for other axes, they are similarly synthesized and obtained.

In the above embodiment, the numerically controlled lathe having the shaft configuration as shown in FIG. 1 has been described as an example, but the present invention is not limited to this. For example, as shown in FIG. 4 may be configured to be movable and driveable in the spindle axis direction and the direction perpendicular to the spindle axis direction similarly to the tool rest 6. Alternatively, as shown in FIG. 8B, the first headstock 2 may be movable in the Z ₁ -axis direction, and the tool rest 6 may be movable in the X-axis direction only. . However, FIG. 8 (b)
In the above, according to (Equation 1) shown in the above embodiment, Z ₂
Instead of obtaining the movement amount of the axis, the movement amount of the Z ₂ axis is Z ₁
It becomes the same as the movement amount of the axis, and the movement direction may be opposite to the Z ₁ axis. Although the example shown in FIG. 8 (b) is not superposition processing, the present invention can be applied to such simultaneous processing.

In the above embodiment, the headstocks 2 and 4 and the tool rest 6 are configured as shown in FIG. 1. However, the present invention is not limited to this. For example, as shown in FIG. 9, the first headstock 2 and the second headstock 2 may be used. The headstock 4 is provided in parallel, and the tool rest 6 is provided in front of these headstocks.
The headstock 2 may be fixed, and the second headstock 4 and the tool rest 6 may be configured to be movable and driven in the spindle axis direction and the direction perpendicular to the spindle axis direction. As described above, the machine having various configurations can be implemented without departing from the scope of the present invention.

[0047]

As is apparent from the above description, the present invention has an advantage that superposition processing can be performed by an inexpensive one-system control numerical controller having no superposition control function.

Further, there is an advantage that the machining program can be easily created without the need to perform complicated calculation when creating the machining program for performing the superposition machining.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a numerical control lathe including a numerical control device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a numerical controller according to the embodiment.

3 (a) and 3 (b) are views for explaining an example of an operation of superimposition processing in the same embodiment.

FIG. 4A and FIG. 4B are views for explaining another example of the superimposing operation in the same embodiment.

FIG. 5 is a diagram illustrating the principle of a linear interpolation function used for a superposition machining command in the embodiment.

FIG. 6 is a flowchart showing a flow of processing for editing a machining program in the embodiment.

7A and 7B are diagrams showing an example of an edited machining program.

8A and 8B are schematic configuration diagrams showing examples of numerical control lathes having different shaft configurations.

FIG. 9 is a schematic configuration diagram showing an example of a numerically controlled lathe having a different configuration.

[Explanation of symbols]

 1 bed 2 1st headstock 3 1st spindle 4 2nd headstock 5 2nd spindle 6 tool post 7 turret 10 processor 11 control program memory 16 keyboard 21 machine tool

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[Procedure amendment]

[Submission date] January 13, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

FIG. 2 is a block diagram showing the configuration of a control device for a numerically controlled lathe. 10 is a control program memory 1
1 is a processor that controls the entire control device according to a program stored in 1. The control program memory 11 is
It is possible to mount a multiple system control function capable of simultaneously processing a plurality of machining programs and a superposition control function.
Reference numeral 12 is a control data memory that stores various data during processing, input / output signals, etc., 13 is a user memory that is a storage unit for data input by the user, such as a machining program storage unit that stores a machining program, and 14 is a machining program. CRT such as a machining program displaying means for displaying, etc., 15 is an interface for converting an output signal from the processor 10 into a signal for display and sending it to the CRT 14, 16 is a keyboard for inputting information, 17 is a keyboard 16 A keyboard interface that outputs an input signal to the processor 10, 18 receives an axis movement command from the processor 10, and outputs an axis movement command to a servo amplifier 19, and an axis control circuit 19 receives the movement command to perform machining. Servo amplifier for driving the servomotor of machine (numerical control lathe) 21, 20 Receiving the output signal from processor 10, it processes the signal and controls the machine tool 21, also receives a state signal from the machine tool 21, a PMC for transferring a signal needed for the processor 10. The above components are connected to each other by a bus line 22.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

At this time, in the case where the first and second steps are overlapped, the second spindle 5 is moved in accordance with the movement of the tool rest 6 for performing the first step (the second spindle 5 and The state where the turret 6 is not relatively moved), and the second
It is necessary to move the second spindle 5 to perform the process of the process. That is, the movement of the second main spindle 5 is the movement for performing the machining in the second step and the movement of the tool rest 6 in addition.
Such processing is hereinafter referred to as superposition processing. In the superposition machining, since the movement command and the feed speed command for each of the first process and the second process must be instructed at the same time, the machining cannot be performed by the single system control, and the control program memory 11
Is equipped with a multi-system control function capable of simultaneously processing a plurality of machining programs and a superposition control function, and the first step and the second step
Machining was performed by simultaneously executing the machining program of the process using the superposition control function.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

[0009]

However, although the above-mentioned numerical control device for one-system control is inexpensive, superimposition processing cannot be performed, and a numerical control device having a multi-system control function or a superposition control function cannot perform superposition processing. However, there is a problem that it is necessary to mount such an expensive function for that purpose.

Claims (2)

[Claims] 1. A method for superposing machining control of a machine tool, which is controlled by one-system control, wherein a distribution command for distributing a commanded feed composite speed to a feed speed of each axis in accordance with a ratio of a movement amount of each axis. A movement command for at least one axis for machining a workpiece held on the first spindle, a movement command for at least one other axis for machining a workpiece held on the second spindle, and each of them. A superposition machining control method, wherein a feed composition speed calculated from a feed rate of an axis according to a predetermined feed composition rule is commanded in one block of a machining program. 2. A numerical control device for a machine tool controlled by single-system control, wherein a machining program storage means for storing a machining program for machining a workpiece held on a first spindle, and a machining program storage means retained on the first spindle. A feed rate of at least one axis for machining a workpiece and a feed rate of at least another axis for machining a workpiece held on the second spindle according to a predetermined feed rate composition rule. Feed composite speed calculation means for calculating, the calculated feed composite speed, a movement command for at least one axis for machining the workpiece held by the first spindle, and the second spindle held by the second spindle. A movement command for at least one other axis for machining the workpiece and a distribution command for distributing the commanded feed composite speed to the feed speed of each axis according to the ratio of the movement amount of each axis. And a program editing means for editing the stored machining program so as to instruct in one block.