JPH0429482B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a numerically controlled automatic lathe (hereinafter referred to as an NC lathe).

[Prior art] Conventionally, as an NC lathe, for example, JP-A-57-
The one shown in Publication No. 48402 is known. this
An NC lathe consists of a fixed headstock that rotatably supports the main spindle, an opposing headstock that slides in the Z3-axis direction that is the same as the spindle centerline direction, and a support headstock that is installed on one side of this opposing headstock to hold the main spindle. A first tool is located in the machining area in front of the headstock and parallel to the spindle centerline direction.
A first tool rest that moves in both the Z1-axis direction and the orthogonal X1-axis direction, and a second tool that is provided on opposite sides of the headstock and held therein are located in the machining area in front of the headstock. Z2 axis direction located opposite the tool and parallel to the spindle center line and X2 orthogonal to it
It consists of a second tool rest that moves in both axial directions.

[Problems to be Solved by the Invention] The conventional NC lathe is a fixed headstock type lathe having a fixed headstock, and the opposing headstock disposed opposite to this headstock moves as follows. This is only when the workpiece is delivered. Therefore, it is difficult to machine long workpieces with this NC lathe.

Normally, for machining long workpieces, a lathe with a center that supports the tip of the workpiece at the center, or a movable headstock lathe with a guide bush and a movable headstock is used. . However, when the headstock is moved, new difficulties arise.

First, because the main axis (Z1 axis) moves, when processing the workpiece gripped by the main axis with the first tool rest (X1 axis) and the second tool rest (Z2 axis, X2 axis) at the same time. , when the first two-axis simultaneous control function using the Z1-axis and X1-axis and the second two-axis simultaneous control function using the Z2-axis and Actual feed speed
It is the sum (or difference) of the feed speed of Z1 axis and Z2 axis,
A problem arises in programming that the feed rate specified in the machining program is not achieved.

Second, a similar problem occurs when attempting to machine a workpiece gripped by the main spindle (Z1 axis) and another workpiece gripped by the opposing spindle (Z3 axis) using tools on the same tool rest. occurs.

An object of the present invention was made to solve the above-mentioned problems, and it is an object of the present invention to provide an NC lathe having opposed headstocks capable of machining long workpieces.

[Means for solving the problem] The above purpose is to provide a headstock that rotatably supports the spindle and slides in the direction of the Z1 axis, which is the direction of the center line of the spindle, and a headstock that is installed on one side of this spindle. and a first tool to be held is located in a machining area in front of the headstock and is located on the opposite side across the headstock from a first tool rest that moves in the X1 axis direction perpendicular to the Z1 axis direction. A second tool provided and held is located in a machining area in front of the headstock, facing the first tool, and
A second tool rest that moves in both the Z2 axis direction parallel to the Z1 axis direction and the X2 axis direction orthogonal to the Z1 axis direction, the Z1 axis, the X1 axis,
In a numerically controlled automatic lathe comprising a numerical control device that controls movement of a headstock, a first tool post, and a second tool post along each direction of the Z2 axis and the X2 axis, the numerical control device Movement of the headstock, movement of the first turret in the X1-axis direction, movement of the second turret in the Z2-axis and X2-axis directions, movement of the headstock in the Z1-axis direction, and movement of the second turret in the X2-axis direction 1st, 2nd, and 3rd 2, which simultaneously control movement in two axial directions by each combination of
It has a simultaneous axis control function, and this second two-axis simultaneous control function is similar to that of the headstock caused by the first two-axis simultaneous control function.
When controlling the movement of the second tool post simultaneously in the Z1-axis direction, the feed amount and feed rate in the Z2-axis direction of the second tool post are the difference between the feed amount and feed rate in the Z1-axis direction of the headstock. This is achieved by having a correction means that calculates the following.

The above object also includes a headstock that rotatably supports the main spindle and slides in the Z1 axis direction which is the center line direction of the main spindle, and a first tool that is provided on one side of this headstock and held. A first tool rest that is located in the machining area in front of the headstock and moves in the X1 axis direction perpendicular to the Z1 axis direction, and a second tool that is provided and held on opposite sides of the headstock. located in the machining area in front of the headstock, facing the first tool, and perpendicular to the Z2 axis direction, which is parallel to the Z1 axis direction.
A second turret that moves in both the X2-axis direction, the Z1-axis,
In a numerically controlled automatic lathe comprising a numerical control device that controls movement of a headstock, a first tool rest, and a second tool rest along the X1-axis, Z2-axis, and X2-axis directions, the numerical control device Axial headstock movement and
Each combination of movement of the first tool rest in the X1-axis direction, movement of the second tool rest in the X2-axis direction and Z2-axis direction, movement of the headstock in the Z1-axis direction and movement of the second tool rest in the X2-axis direction It has a simultaneous control function for the first, second, and third axes that simultaneously controls movement in two axes directions and performs independent feed operations, and also has a simultaneous control function for the Z1 axis and
This is achieved by having a three-axis simultaneous and overlapping control function that simultaneously executes two sets of feed operations: the X1 axis, the Z1 axis, and the X2 axis using the Z1 axis as a medium.

[Operation] In order to simultaneously move the X1 axis and the X2 axis with respect to the Z1 axis, two sets of two If you use the simultaneous axis control function (this is referred to as the 3-axis simultaneous overlapping control function) to perform feed operations that include two sets of two-dimensional movement control at the same time, for example, the roughness caused by the first tool of the first tool rest Cutting and the second of the second turret
Finish cutting using a tool can be performed at the same time.

In addition, the Z1 axis using the first two-axis simultaneous control function
While cutting the workpiece gripped by the spindle with the first tool of the first tool post using a feed operation that includes two-dimensional movement control using the X1 axis, the second two-axis simultaneous control function was used.
If you try to machine the same workpiece with the second tool of the second tool rest in a feed operation that includes two-dimensional movement control using the Z2 and X2 axes, the workpiece will move as the Z1 axis moves, so the Z2 The axis needs to move according to the value of the feed amount and feed rate required for a single feed operation plus (or subtracted) that of the Z1 axis. In this case, it is most natural to input the Z1-axis control pulse directly to the Z2-axis control pulse by adding (or subtracting) it to the correction means for correcting the Z2-axis feed rate (feed amount).
Errors in programming are less likely to occur. By doing this, for example, the workpiece gripped by the spindle can be drilled by the second tool of the second tool rest, and the first
The first tool of the tool rest can perform outer diameter cutting at the same time, and the second tool can perform machining without being affected by the movement of the workpiece due to movement of the Z1 axis.

[Example] An example of the present invention will be described below with reference to FIGS. 1 and 2. A guide bush support 12 having a guide bush 11 is fixed approximately at the center of the upper surface of the bed 10.

On the upper surface of the bed 10 on the right side of the guide bush 11 is a Z1-axis table 20 that is slidable in the Z1-axis direction.
is placed thereon, and this Z1-axis table 20 is moved by a Z1-axis feed motor 21 fixed to the bed 10. A headstock 22 is fixed on the Z1-axis table 20, and the headstock 22 includes:
A main shaft 23 whose central axis extends in the Z1-axis direction is rotatably supported. The axis of the main shaft 23 is arranged concentrically with the guide bush 11, and
3 is rotated via a belt 25 by a main shaft rotation motor 24 fixed to the Z1-axis table 20.

On the bed 10 on the front side of the headstock 22,
Perpendicular to the sliding direction of the headstock 22 (Z1 axis direction)
An X1-axis table 30 is placed so as to be slidable in the X1-axis direction, and this X1-axis table 30 is placed on the bed 1.
It is moved by the X1 axis feed motor 31 which is fixed at zero. On the X1 axis table 30,
The first tool rest 32 is fixed, and this first tool rest 32
A turret 34 holding a plurality of first tools 33 is rotatably supported on the turret 34 . Turret 3
4 is disposed so as to be located on the front side of the front surface of the guide bush 11, so that the first tool 3
3 is located in the processing area at the front mouth of the guide bush 11. Then, it is rotated in the T1 axis direction by a tool indexing motor 35 fixed to the first tool rest 32, and a desired first tool 33 is indexed.

Left side of guide bush 11 (guide bush 1
On the upper surface of the bed 10 on the side opposite to the spindle center line of the headstock 22 (opposite side of the headstock 22 across the headstock 22), there is a groove that slides in the Z2-axis direction parallel to the sliding direction (Z1-axis direction) of the headstock 22. A Z2-axis table 40 is mounted thereon, and this Z2-axis table 40 is moved by a Z2-axis feed motor 41 fixed to the bed 10. Also, the Z2 axis table 40 has
An X2-axis table 42 is mounted so as to be able to slide in the X2-axis direction perpendicular to the Z2-axis direction.
It is moved by a shaft feed motor 43. Said
A second tool rest 44 is fixed on the X2-axis table 42, and a turret 46 holding a plurality of second tools 45 is rotatably supported on the second tool rest 44. The turret 46 is located on the front side of the guide bush 11. Therefore, the second tool 45 is positioned opposite the first tool 33 in the machining area at the front mouth of the guide bush 11. And the second tool rest 44
T2 by the tool indexing motor 47 fixed to
It is rotated in the axial direction and a desired second tool 45 is indexed.

The second tool rest 4 is located on the left side of the guide bush 11.
A Z3-axis table 50 is placed on the top surface of the bed 10 on the front side of the headstock 22 so as to be slidable in the Z3-axis direction parallel to the sliding direction (Z1-axis direction) of the headstock 22. The table 50 is moved by a Z3 axis feed motor 51 fixed to the bed 10. A counter headstock 52 is fixed on the Z3-axis table 50, and a counter spindle 53 disposed coaxially with the main shaft 23 of the headstock 22 is rotatably supported on the counter headstock 52. Opposed spindle 5
3 has a chuck (not shown) that is capable of gripping a workpiece, and is rotated via a belt 56 by an opposed spindle rotating motor 55 fixed to the Z3-axis table 50.

Next, the operation of the NC lathe having such a configuration will be explained. A workpiece (bar) gripped by a collector chuck (not shown) of the main shaft 23 is inserted into the guide bush 11 and rotates together with the main shaft 23. In addition, during actual cutting, the drive in each axis direction by the Z1 axis feed motor 21, X1 axis feed motor 31, Z2 axis feed motor 41, X2 axis feed motor 43, and Z3 axis feed motor 51 is controlled by a numerical control device. is driven by the command of

First, a case where the opposing headstock 52, that is, the Z3 axis is not used, will be described.

(1) Machining using feed operations including two-dimensional movement control using combinations of Z1 and X1 axes, Z1 and X2 axes, and Z2 and X2 axes (independent 2-axis simultaneous control function) As shown in Figure 3. Then, move the headstock 22 in the Z1 axis direction using the well-known two-axis simultaneous control function,
By moving the first tool post 32 in the X1-axis direction, a feed operation including two-dimensional movement control is performed, and the workpiece 60 gripped by the main shaft 23 is cut into an arbitrary shape such as a straight line, taper, or circular arc. can. Such machining is performed by gripping the workpiece 61 by a combination of the Z1 axis and the X2 axis or by the opposing main shaft 53,
The same thing can be done by combining the Z2 axis and the X2 axis with the Z3 axis fixed.

Note that while machining is being performed using the combination of two axes, Z1 and X1, using the first tool 33 installed on the first tool rest 32, the second
The second tool 45 on the tool rest 44 is placed on the workpiece 6 in advance.
By keeping it close to 0 and waiting,
It becomes possible to significantly shorten the time required to change tools. Similarly, the second
While machining is being performed with the tool 45, it is also possible to bring the first tool 33 of the first tool post 32, which will be used in the next step, close and on standby.

(2) Machining using a combination of feed operations including two sets of two-dimensional movement control for simultaneous three-axis movement of the Z1-axis, X1-axis, and X2-axis (3-axis simultaneous overlapping control function) As shown in Figure 4, In order to simultaneously move the X1 and X2 axes with respect to the Z1 axis,
For each combination of axis and X1 axis and Z1 axis and X2 axis
If two sets of 2-axis simultaneous control functions (referred to as 3-axis simultaneous overlapping control functions) using the Z1 axis are used to simultaneously perform a feed operation including two-dimensional movement control, for example, the first tool post 32 1st tool 3
Rough cutting by 3 and the second tool 4 of the second tool rest 44
Finish cutting according to No. 5 can be performed at the same time.

However, in this case, the feed rates for rough cutting by the first tool 33 and for finishing cutting by the second tool 45 are the same.

(3) Machining using feed operation including two sets of two-dimensional movement control for simultaneous movement of four axes: Z1-axis and X1-axis and Z2-axis and X2-axis (3.1) Z1 using the first two-axis simultaneous control function
At the same time, the feed operation including two-dimensional movement control is performed on the Z2-axis and the X2-axis using the second two-axis simultaneous control function, and the If a feed is given in synchronization with the Z1 axis but not with the X2 axis, for example, as shown in FIG.
The tool 45 is provided with a center function, whereby the first tool 33 of the first tool rest 32 supports the workpiece 60 gripped by the spindle 23 at the center.
It can be cut with.

Here, the feed of the Z2 axis (feed amount and feed speed)
The difference from the feed of the Z1 axis (headstock 22) is 0.
, and they are sent in the same direction at the same speed, so
It is desirable to use the control signal for Z1-axis feed as much as possible in order to prevent mistakes from occurring.

(3.2) Z1 using the first two-axis simultaneous control function
The main shaft 23 is moved by the first tool 33 of the first tool post 32 through a feed operation that includes two-dimensional movement control using the axis and the X1 axis.
While cutting the workpiece 60 gripped by the machine, the second tool rest 4 is moved by a feed operation including two-dimensional movement control using the Z2 axis and the X2 axis using the second two-axis simultaneous control function.
When attempting to machine the same workpiece 60 with the second tool 45 of No. 4, the workpiece 60 moves as the Z1 axis moves, so the Z2 axis has a feed amount that is different from the feed amount required when performing a single feed operation. to the feedrate value
It is necessary to move according to the value added (or subtracted) from that of the Z1 axis. In this case, the correction means for correcting the feed rate (feed amount) of the Z2 axis includes:
It is most natural to input the Z1-axis control pulse as it is by adding (or subtracting) it to the Z2-axis control pulse, and errors in creating the machining program are less likely to occur. By doing this, for example, as shown in FIG. 6, the second tool 45 of the second tool rest 44 is
and the first tool 3 of the first tool rest 32.
When trying to perform simultaneous outer diameter cutting according to No. 3, the second tool 45 can perform the machining without being affected by the movement of the workpiece due to the movement of the Z1 axis.

According to this method, it is also possible to perform rough cutting and finishing cutting in FIG. 4 at different feed rates.

Next, a case in which machining is performed using the opposing headstock 52 will be described.

(4) Machining by feeding operation including two-dimensional movement control of two sets of Z1-axis and X1-axis and Z2-axis and X2-axis, as shown in Figure 7, the first cutter to the first tool 33 on the stand 32.
By performing a feeding operation including two-dimensional movement control of the Z1 axis and the
The second tool of the second tool post 44 is stopped by stopping the axis at the retracted position and performing a feeding operation including two-dimensional movement control of the Z2 axis and the X2 axis using the third two-axis simultaneous control function. Another workpiece 61 held by the opposing main shaft 53 at 45 can be simultaneously machined. Normally, this machining is used when performing back machining, and the workpiece 61 on the opposing spindle 53 side is after the parting process of the workpiece 60 on the headstock 22 side has been completed, and 1st
Just before the end of machining with the tool 33, the counter headstock 52 is moved by the Z3 axis to move the counter spindle 53 forward of the guide bush 11 to check the workpiece 60 to be cut off, and after the machining is finished, the Z3 axis remains unchanged. is retreated to a predetermined position and stopped, and the back side is processed by the second tool 45 of the second tool rest 44. By doing this,
One workpiece 60 gripped by the main spindle 23 and another gripped by the opposite main spindle 53 after cutting off the workpiece 60
Two workpieces 61 can be machined simultaneously by the first tool 33 of the first tool rest 32 and the second tool 45 of the second tool rest 44.

Of course, the second tool rest 44 after back processing is
As described in (1) to (3), together with the first tool rest 32, the workpiece held by the main shaft 23 can be machined.

(5) Machining by independent movement of the Z3 axis As shown in FIG. For example, a drill) can be advanced onto the center line of its main axis and then fixed, and the Z3 axis can be moved independently to drill a hole in the cut-off surface of the workpiece 61. This means that the tool 45 of the same second tool rest 44 can be moved to the headstock 2 at the same time.
This is a processing method used when the workpiece 61 held by the opposing spindle 53 is simultaneously machined while the workpiece 60 held by the spindle 3 is machined.

This is a modification of the processing described in (4) in which feed is not applied to the X1 and X2 axes.

(6) Machining by feeding operation including two-dimensional movement control of Z1 and X1 axes and Z3 and X2 axes The tool 33 of the first tool post 32 is and spindle 23
At the same time, the second tool 45 of the second tool post 44 is machining one workpiece 60 gripped by the Z3-axis and X2-axis simultaneously on the opposite spindle 53 side. Two workpieces 61 can be processed simultaneously. The processing is carried out in the same manner as described in (4) (see Figure 7).

In the above operation examples, the guide bush 11 has been omitted in the explanation, but as is well known, it is desirable to use the guide bush when processing long bar materials. When a guide bush is used, as is well known, the guide bush is placed between the main shaft 23 and the first tool 33 at a position close to the first tool 33, and cutting is performed by the first tool 33 at the mouth of the guide bush. . It is also well known that guide bushings are not necessary when short lengths or chuckworks are required.

[Effects of the Invention] As is clear from the above description, according to the present invention, the headstock, the first tool rest, and the second tool rest along each direction of the Z1 axis, the X1 axis, the Z2 axis, and the X2 axis. The numerical control device that controls the movement can move the headstock in the Z1-axis direction, move the first turret in the X1-axis direction, and move the second turret in the Z2-axis direction and the X2-axis direction. The first and second two-axis simultaneous control function performs feed operation including two-dimensional movement control by simultaneously moving in the axial direction, and the two-dimensional movement control function for two sets of Z1 axis and X1 axis and Z1 axis and X2 axis. It has a three-axis simultaneous overlapping control function that simultaneously executes feeding operations including the Z1 axis as a medium, and can easily process long workpieces.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the NC lathe according to the present invention, Fig. 2 is a plan view of Fig. 1, and Figs. 3 to 8 are explanatory views each showing an example of control of each axis. It is. 22...headstock, 23...main spindle, 32...first
Turret, 33...First tool, 34...Turret, 44...Second tool post, 45...Second tool, 4
6... Turret, 52... Opposed headstock, 53...
...Opposed spindle.

Claims (1)

[Scope of Claims] 1. A headstock that rotatably supports a main spindle and slides in the Z1-axis direction, which is the centerline direction of the main spindle, and a first tool that is provided on one side of this headstock and held. is located in the machining area in front of the headstock, and
A first tool rest that moves in the X1 axis direction perpendicular to the axial direction, and a second tool that is provided on opposite sides of the headstock and held therein are located in a machining area in front of the headstock and are opposed to the first tool. a second turret that is located in the direction of the Z1 axis and moves in both the Z2 axis direction parallel to the Z1 axis direction and the X2 axis direction perpendicular to the Z1 axis direction;
In the numerically controlled automatic lathe, the numerical control device includes a numerical control device that controls the movement of the headstock, the first tool rest, and the second tool rest along each direction of the axis and the X2 axis. Movement of the table, movement of the first turret in the X1-axis direction, movement of the second turret in the Z2-axis and X2-axis directions, and movement of the headstock in the Z1-axis direction.
It has a 2-axis simultaneous control function for the 1st, 2nd, and 3rd, which simultaneously controls the movement in the 2-axis directions by each combination of the movement of the 2nd tool post in the X2 axis direction, and performs independent feed operations. The second two-axis simultaneous control function is based on the headstock control function caused by the first two-axis simultaneous control function.
When controlling the movement of the second tool post simultaneously in the Z1-axis direction, the feed amount and feed rate in the Z2-axis direction of the second tool post are the difference between the feed amount and feed rate in the Z1-axis direction of the headstock. A numerically controlled automatic lathe characterized by having a correction means that calculates the following. 2 The correction means is such that the difference between the feed amount and feed speed in the Z2-axis direction of the second tool rest and the feed amount and feed speed in the Z1-axis direction of the headstock is 0, and the difference between the second tool rest and the headstock is 2. The numerically controlled automatic lathe according to claim 1, wherein the lathe is corrected so that the lathes are fed in the same direction and at the same speed. 3 A headstock that rotatably supports the main spindle and slides in the Z1-axis direction, which is the direction of the center line of the main spindle, and a first tool that is provided on one side of this headstock and is held in front of the headstock. Located in the processing area and above Z1
A first tool rest that moves in the X1 axis direction perpendicular to the axial direction, and a second tool that is provided on opposite sides of the headstock and held therein are located in a machining area in front of the headstock and are opposed to the first tool. a second turret that is located in the direction of the Z1 axis and moves in both the Z2 axis direction parallel to the Z1 axis direction and the X2 axis direction perpendicular to the Z1 axis direction;
In the numerically controlled automatic lathe, the numerical control device includes a numerical control device that controls the movement of the headstock, the first tool rest, and the second tool rest along each direction of the axis and the X2 axis. Movement of the table, movement of the first turret in the X1-axis direction, movement of the second turret in the Z2-axis and X2-axis directions, and movement of the headstock in the Z1-axis direction.
It has a first, second, and third two-axis simultaneous control function that simultaneously controls the movement in two axes directions by each combination of movement of the second tool post in the X2 axis direction and performs independent feed operations, and axis and X1 axis and
A numerically controlled automatic lathe characterized by having a three-axis simultaneous overlapping control function that simultaneously executes two sets of feed operations, the Z1 axis and the X2 axis, using the Z1 axis as a medium. 4 A headstock that rotatably supports the main spindle and slides in the direction of the Z1 axis, which is the direction of the center line of the main spindle, and a first tool provided on one side of this headstock to hold it is located in front of the headstock. Located in the processing area and above Z1
A first tool rest that moves in the X1 axis direction perpendicular to the axial direction, and a second tool that is provided on opposite sides of the headstock and held therein are located in a machining area in front of the headstock and are opposed to the first tool. a second tool rest located at the same position and movable in both the Z2-axis direction parallel to the Z1-axis direction and the X2-axis direction perpendicular to the Z1-axis direction; and a guide bush provided close to the machining area on the spindle center line;
an opposing headstock that is disposed coaxially opposite to the spindle center line of the headstock with this guide bush in between, and slides in the Z3-axis direction, which is the same as the Z1-axis direction;
In a numerically controlled automatic lathe comprising a numerical controller that controls the movement of the headstock, first tool rest, second tool rest, and opposing head stock along each direction of the X1 axis, Z2 axis, X2 axis, and Z3 axis, The numerical control device moves the headstock in the Z1-axis direction, moves the first tool rest in the X1-axis direction, moves the second tool rest in the Z2-axis direction and the X2-axis direction,
Movement of the opposing headstock in the Z3-axis direction and the second movement in the X2-axis direction
Movement of the turret and movement of the headstock in the Z1 axis direction and X2
First, second, third, and fourth turrets that simultaneously control the movement in two axial directions by each combination of the movement of the second turret in the axial direction and perform independent feeding operations, respectively.
The second and third two-axis simultaneous control functions control the movement of the second tool rest at the same time as the first two-axis simultaneous control function controls the movement of the headstock in the Z1-axis direction. Sometimes, the feed amount and feed speed in the Z2-axis direction of the second tool rest and the feed amount and feed speed in the Z3-axis direction of the opposing headstock are the difference between the feed amount and feed speed in the Z1-axis direction of the headstock. A numerically controlled automatic lathe characterized by having a correction means for calculating so that 5. The correction means adjusts the feed amount and feed rate in the Z2-axis direction of the second tool rest, the feed amount and feed rate in the Z3-axis direction of the opposing headstock, and the feed amount and feed rate in the Z1-axis direction of the headstock. The numerical control automatic according to claim 4, characterized in that the difference is 0, and the correction is made so that the second tool rest or the opposing headstock and the headstock are fed in the same direction and at the same speed. lathe. 6 A headstock that rotatably supports the main spindle and slides in the direction of the Z1 axis, which is the direction of the center line of the main spindle, and a first tool provided on one side of this headstock to hold it is located in front of the headstock. Located in the processing area and above Z1
A first tool rest that moves in the X1 axis direction perpendicular to the axial direction, and a second tool that is provided on opposite sides of the headstock and held therein are located in a machining area in front of the headstock and are opposed to the first tool. a second tool rest located at the same position and movable in both the Z2-axis direction parallel to the Z1-axis direction and the X2-axis direction perpendicular to the Z1-axis direction; and a guide bush provided close to the machining area on the spindle center line;
an opposing headstock that is disposed coaxially opposite to the spindle center line of the headstock with this guide bush in between, and slides in the Z3-axis direction, which is the same as the Z1-axis direction;
In a numerically controlled automatic lathe comprising a numerical controller that controls the movement of the headstock, first tool rest, second tool rest, and opposing head stock along each direction of the X1 axis, Z2 axis, X2 axis, and Z3 axis, The numerical control device moves the headstock in the Z1-axis direction, moves the first tool rest in the X1-axis direction, moves the second tool rest in the Z2-axis direction and the X2-axis direction,
Movement of the opposing headstock in the Z3-axis direction and the second movement in the X2-axis direction
Movement of the turret and movement of the headstock in the Z1 axis direction and X2
First, second, third, and fourth turrets that simultaneously control the movement in two axial directions by each combination of the movement of the second turret in the axial direction and perform independent feeding operations, respectively.
A numerically controlled automatic lathe characterized by having an axis simultaneous control function and a three-axis simultaneous control function that simultaneously executes two sets of feed operations, Z1 axis and X1 axis and Z1 axis and X2 axis, using the Z1 axis as a medium. . 7. The opposing spindle of the opposing headstock is a back processing shaft that grips and rotates the workpiece after parting and performs back processing. Numerical control automatic lathe.