JPH01289603A - Facing spindle lathe - Google Patents

Abstract

PURPOSE:To enhance machining accuracy together with C-axis control by positioning first and second spindles in predetermined delivery angle positions respectively on the basis of a work delivery command by spindle control so as to deliver a work. CONSTITUTION:Upon completing machining of a work 36 held by means of a first spindle 3a, a main control unit 12 outputs a delivery command so that spindle control means 21 and 22 control motors 3c and 5c while returning signals from transducers 3d and 5d, thereby positioning both spindles 3a and 5a in respective delivery positions. Delivery drive control means 19 and 20 control motors 7 and 9 so as to bring both spindles 3a and 5a into contact with each other while holding C-axis angle positions intact, and thereat, alternate releasing and fastening of chucks 5b and 3b delivers the work 36 from the first spindle 3a to the second spindle 5a, thereby resulting in machining in the second process. This enables milling or the like together with C-axis control with accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention is directed to an opposed spindle lathe having two opposing spindles, in which a workpiece is moved between the spindles.
The present invention relates to an opposed spindle lathe that can directly transfer two spindles while maintaining their angular positions in the C-axis direction to perform milling and the like with C-axis control.

(b), Prior Art Usually, in an opposed spindle lathe having two spindles facing each other, in order to process a workpiece, the workpiece must be
It is attached to either one of the spindles via a chuck and the first process is performed.

After the first process is completed, the workpiece is transferred to a chuck attached to the other spindle using a handling robot or the like, and after the transfer is completed, the second process is performed on the workpiece that has undergone the first process. .

(C) 6 Problems to be Solved by the Invention However, with this method, when a workpiece is removed from one chuck and attached to the other chuck, a phase shift occurs on the C-axis of the workpiece, and after the transfer is completed, However, when a workpiece is subjected to a second step of machining, such as mee-link machining accompanied by C-axis control, there is an inconvenience that the accuracy decreases.

In view of the above circumstances, the present invention provides the following features:
We use an opposed spindle lathe that can directly transfer a workpiece while maintaining the angular position in the C-axis direction of a single spindle, and after the transfer is complete, perform milling etc. on the workpiece with C-axis control with high precision. The purpose is to provide.

(d) Means for solving the zero problem, that is, the present invention has first and second spindles (3a, 5a) facing each other and rotatably provided; Rotary drive means (3c, 5C) are attached to the two spindles (3a, 5a), respectively.
5a) so as to be rotatably driven, and the feed drive means (7, 9) are connected to the first and second spindles (
3a, 5a) is connected so that it can be driven to move in the Z-axis direction, and a memory means (15) storing a work transfer command is provided, and the rotation driving means (3c
, 5c), the rotation drive means (3c, 5c) is drive-controlled based on the work transfer command to drive the first and second spindles (3a).

5a) to a predetermined transfer angle position (CP) by spindle control, and further, to the feed drive means (7, 9), the amount is determined based on a transfer command. Feed drive control means (19, 20) that drives and controls the feed drive means (7, 9) to relatively approach and separate the first and second spindles (3a, 5a);
It is configured by connecting.

(e) 3 effects With the above-described configuration, the present invention holds the workpiece (36) on the first spindle (3a) to process the first step, and after completing the first step, the workpiece (36) When transferring from the first spindle (3a) side to the second spindle (5a) side, the spindle control means (21, 22) rotates the rotation drive means <30.5c) based on the workpiece transfer command.
by controlling the first and second spindles (3a, 5a)
is positioned at the delivery angle position (cp). Then,
The feed drive control means (19, 20) controls the feed drive means (
7, 9], the first and second spindles (3a
, 5a) are moved relatively close to each other while maintaining the angular positions of both spindles in the C-axis direction, the workpiece (36) is held by the first and second spindles (3a, 5a), and in this state, the The holding relationship between the first spindle (3a) and the workpiece (36) is released, and in this state, the first and second spindles (3a, 5a) are relatively separated, and the workpiece (36) is released.
36) is directly delivered to the second spindle (5a) side, and after the delivery is completed, the workpiece (36) is operated to perform the second step processing.

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a control block diagram showing an embodiment of the opposed spindle lathe according to the present invention, FIG. 2 is a plan view of the opposed spindle lathe shown in FIG. 1, and FIGS. 3 to 10 are the opposed spindle lathe according to the present invention. 11 is a view of the workpiece in the direction of the Q arrow in FIG. 5; FIG. 12 is a view of the workpiece in the direction of the R arrow in FIG. 9. .

As shown in FIG. 1, the opposed spindle lathe 1 has a body 2 provided with a guide surface 2a on the upper part.
On a, two headstocks 3.5 are provided facing each other and movable independently in the directions of arrows A and B (i.e., the Z-axis direction), which are the left and right directions in the figure. ing. Headstock 3,
5, spindles 3a and 5a are respectively indicated by arrows C and D.
Chucks 3b and 5b are mounted on the spindles 3a and 5a, respectively, so as to be rotatable in the directions of arrows C and D.

Further, spindle drive motors 3c and 5c are directly connected to the spindles 3a and 5a, respectively.
The spindle drive motors 3c and 5C have a mechanism for detecting the amount of rotation angle of the spindle drive motors 3c and 5c in the directions of arrows C and D (therefore, the amount of rotation angle of the spindles 3a and 5a in the directions of arrows C and D). transducer 3
d and 5d are installed.

Furthermore, the machine body 2 is provided with a headstock feed drive device 6, as shown in FIG.
It has nuts 3e, 5s, a feed drive motor 7.9, a drive screw 10.11, etc. That is, the first
At the bottom end of the figure, nuts 3e and 5e are respectively attached to the guide surface 2.
protrudes into the machine body 2 through a, and connects the machine body 2 with the headstock 3.
．． Nuts 3e and 5e are provided in a form that is movable in the directions of arrows A and B (direction of the Z axis) together with the nuts 3e and 5e. It is screwed in. Further, drive screws 10.11 having the same pitch are screwed into the nuts 3e and 5e so as to be rotatable in the directions of arrows E and F.
．． 11 are each connected with a feed drive motor 7.9.

Each of the feed drive motors 7.9 is equipped with transducers 7a and 9a for detecting the amount of rotation angle of the feed drive motors 7.9 in the direction of the arrow EF. In addition,
Drive the feed drive motor 7.9 to drive the drive screw 10.11.
By rotating in the direction of arrow E or F, the headstock 3,
5 is driven to move in the direction of arrow A or B (Z-axis direction) via nuts 3e and 5e, respectively.

Also, the opposing spindle rotates! As shown in FIG. System program memory 16. The keyboard 17, the turret control section 39.40, the feed drive motor control section 19.20, the C-axis control sections 21 and 22, and the rotation speed control section 23.25 are connected.

Here, the tool post control section 39 controls the tool post 26 shown in FIG.
The turret control section 40 is connected to the turret 27.
is connected to. The feed drive motor control section 19 also includes the above-described feed drive motor 7 and transducer 7a.
The feed drive motor control section 20 is connected to the feed drive motor 9 and the transducer 9a.

In addition, the C-axis control section 21 includes a spindle quick-acting motor 3c.
and a transducer 3d, and a spindle drive motor 5c and a transducer 5d are connected to the C-axis control section 22.

Furthermore, the rotation speed control section 23 includes a spindle drive motor 3.
The spindle drive motor 5c and the transducer 5d are connected to the rotation speed control section 25.

In addition, the second line segment connecting the axis of the headstock 3.5 of the machine body 2
At the top of the figure, there are two turret-type tool rests 26 and 27.
In the directions of arrows G and H (that is, in the X-axis direction), which are perpendicular to the directions of arrows A and B, which are the Z-axis direction.

Each of the turret heads 26a and 27a is provided on the tool rest 26, 27 in such a manner that it can be moved freely and corresponds to each headstock 3.5. arrow 1. It is supported so that it can rotate freely in the J direction. The turret heads 26a and 27a are entirely formed into a polygonal cylindrical shape, and a plurality of tools 29 including turning tools such as a cutting tool and rotating tools such as a drill and a price cutter are mounted on each headstock 3 on the side surface of the turret heads 26a and 27a. It is provided in a form that corresponds to .5. Note that each tool is provided in such a way that it can face the corresponding headstock side, so that the tools mounted on the respective turret heads 26a, 27a may interfere with each other due to the turning operation of the turret heads 26a, 27a. Also, each turret head 26a, 27a
have their sides facing each other, so each turret
- The heads 26a, 27a are arranged rearwardly relative to the tool rest 26,27.

Since the opposed spindle M-machine 1 has the above-described configuration, when processing a workpiece, first the workpiece 3 to be processed is
6 is attached to the spindle 3a via the chuck 3b, as shown in FIG.

At this time, the setup work for the workpiece 36 to the chuck 3b and the setup work for the tool 29 to the tool rest 26 are performed because the tool rest 26.2'7 is located above the headstock 3.5 in FIG. This can be done from the side where the turret is not located at the bottom of the figure, without being obstructed by the turret.
The zero order has good accessibility and workability to the chuck 3b,
In this state, the operator instructs the main control section 12 to start machining the workpiece 36 via the keyboard 17. Then,
The main control unit 12 reads a machining program PRO corresponding to the workpiece 36 to be machined from the machining program memory 15, and performs predetermined machining on the workpiece 36 based on the machining program PRO.

That is, the main control section 12 shown in FIG.
The spindle 3a is rotated in the direction of arrow C at a predetermined rotation speed NA set by RO.

In response to this, the one-rotation speed control section 23 instructs the rotation speed control section 23 to move the spindle drive motor 3c to the spindle 3.
Rotate it in the direction of arrow C along with a.

Then, the transducer 3d attached to the spindle drive motor 3c outputs a rotation signal R8I to the rotation speed control section 23 at every predetermined rotation angle of the spindle drive motor 3c (therefore, the spindle 3a), and the rotation The number control unit 23 counts the number of input rotation signals R8I per predetermined time to determine the rotation speed of the spindle 3a, and controls the rotation speed of the spindle drive motor 3c to a predetermined rotation speed NA.

Further, the main control section 12 shown in FIG. 1 instructs the feed drive motor control section 19 to move the headstock 3 by a predetermined amount in the Z-axis direction. In response to this, the feed drive motor control section 19 outputs a drive signal D2 to the feed drive motor 7.

Then, the feed drive motor 7 rotates in the direction of arrow E or F together with the drive screw 1o, and moves the headstock 3 in the direction of arrow A or B (Z-axis direction) via the nut 3e. At this time, the transducer 7a attached to the feed drive motor 7 sends a two-rotation signal every time the feed immediate motor 7 (therefore, the drive screw 10) rotates by a predetermined angle in the direction of arrow E or F. RS2 is output to the feed drive motor control section 19. The feed drive motor control section 19 receives the rotation signal R5.
Count the number of inputs in step 2 and press the arrow E of the feed drive motor 7.
, detects the amount of movement of the headstock 3 in the Z-axis direction, which is proportional to the amount of rotation angle in the F direction, and controls the amount of movement so that it becomes the amount of movement set in the cutting program PRO.

Further, the main control section 12 instructs the tool post control section 39 to select the tool 29 used for machining and control the amount of movement of the tool 29 in the X-axis direction. Then, the tool post control section 39
3, the turret head 26a of the tool rest 26 is rotated as appropriate in the direction of arrow I or J in FIG.
is positioned to face the workpiece 36, and the tool rest 26 is moved and driven as appropriate in the directions of arrows G and H together with a turning tool 29, and the outer diameter portion of the workpiece 36 is shaped into a predetermined shape by the tool 29. Turning.

When the outer diameter portion of the workpiece 36 has been turned as shown in FIG. 3, the tool rest 26 is appropriately moved in the direction of arrow C to retreat from the workpiece 36. 26a as appropriate in the arrow ■ or J direction to position the tool 29 for internal turning, such as a drill or boring rebit, at a position facing the workpiece 36. Next, in this state, the tool rest 26 is , and feed the tool 29 together with the tool 29 by a predetermined distance in the direction of arrow H in FIG.
With the workpiece 36 held in the chuck 3b, arrow A,
The tool 2 is moved and driven appropriately in the B direction (Z-axis direction).
9, the inner diameter portion of the workpiece 36 is machined. After the machining, the headstock 3 is appropriately moved in the direction of the arrow hole in Fig. 4 to take the tool 29 out of the inner diameter part of the workpiece 36, and in this state, the rotation of the chuck 3b in the C direction is stopped. do. Also.

In preparation for the next milling process, the tool rest 26 is moved in the direction of arrow C to retreat from the workpiece 36, and in this state, the milling tool 29 attached to the tool rest 26 is moved to a position facing the workpiece 36. Position it at

After the inner diameter portion of the workpiece 36 has been machined as shown in FIG. 4, the workpiece 36 is subjected to a milling process accompanied by C-axis control.

That is, the main control section 12 shown in FIG.
1 to return the spindle 3a to its origin. Then, the C-axis control section 21.

The spindle drive motor 3c is rotated at low speed in the direction of arrow C or D.

When the spindle 3a reaches a predetermined position, an origin detection signal O81 is output from the transducer 3d to the C-axis control section 21. Upon receiving this, the C-axis control unit 21 immediately stops the rotational drive of the spindle drive motor 3c in the direction of arrow C or D.

Then, the spindle 3a also stops rotating in the direction of arrow C or D, and returns to the predetermined reference position SPI of the spindle 3a.
is positioned at the CM origin czp as shown in FIG.

Next, the main control section 12 drives the tool post control section 39 to
The tool rest 26 shown in FIG.
9 is rotated and moved by a predetermined distance in the direction of arrow H, and further the headstock 3 is appropriately moved and driven in the direction of arrow B. Then, the tool 29 forms a groove 36a in the outer circumferential portion of the workpiece 36 at a predetermined angle θ1 in the direction of the arrow from the C-axis origin C7P shown in FIG.

In addition, when 1336a is drilled, the tool rest 26
, move the tool 29 appropriately in the direction of arrow C, and move the tool 29 to the workpiece 3.
Next, the main control section 12 outputs a C-axis control signal C3I to the C-axis control section 21 shown in FIG. Then, the C-axis control section 21 controls the spindle drive motor 3.
c is rotated together with the spindle 3a at low speed in the direction of arrow C. Then, a rotation signal R53 is generated from the transducer 3d at every predetermined rotation angle of the spindle drive motor 3c.
is output to the C-axis control section 21, and the C-axis control section 21 counts the number of inputs of the rotation signal R83, and controls the spindle 3a.
Detect the amount of rotation angle. The C-axis control unit 21 stops the rotational drive of the spindle drive motor 3c in the direction of arrow C when the rotation angle amount reaches a predetermined rotation angle amount 02. Then, the spindle 3a also moves along with the workpiece 36 in the direction of arrow C.
The spindle 3a (therefore, the workpiece 36) is positioned at a position rotated by a predetermined angle θ2 in the direction of the arrow C from the origin czp.

Next, the tool rest 26 that has been retracted in this state is moved a predetermined distance toward the workpiece 36 in the upward direction of the arrow in FIG.
is appropriately moved and driven in the direction of arrow B. Then, a groove 36b is drilled in the outer peripheral portion of the workpiece 36 so as to be spaced from the previously drilled groove 36a by a predetermined angle θ2 in the direction of the arrow in FIG.

In this way, when milling etc. are performed on the workpiece 36 and the first process is completed, the main control unit 1
2 calls the work transfer program WTP from the system program memory 16 shown in FIG. A command is given to position at the delivery position CP (see FIG. 11). Then, in response to this, the C-axis control unit 21 drives the spindle drive motor 3c to rotate the spindle 3.
A is slowly rotated together with the workpiece 36 in the direction of arrow C or D. Then, the transducer 3d attached to the spindle drive motor 3c outputs a rotation signal R54 to the C-axis control unit 21 every predetermined rotation angle of the spindle drive motor 3c in the direction of arrow C or D.

Then, the C-axis control unit 21 counts the number of input rotation signals R54 and sets the C-axis origin CZP (
(see Fig. 11), and determine the position relative to the spindle 3a.
The reference position SPI is a delivery position that is a predetermined angle α away from the C-axis origin CZP in the direction of arrow C! When positioned at the ICP, a stop signal STI is output to the spindle drive motor 3c shown in FIG. Then, the spindle drive motor 3c stops rotating in the directions of arrows C and D in response to this, and as a result, the spindle 3a stops rotating in the directions of arrows C and D together with the workpiece 36, and the spindle 3a stops rotating in the directions of arrows C and D.
a is positioned at the delivery position CP. Note that the C-axis origin (i.e., α=
It is also possible to select (in the case of O). That is, in the wood transfer operation, when the workpiece is transferred between the spindles 3a and 5a, the angular position of the workpiece in the C-axis direction is
The transfer position CP may be set at any angular position, such as the spindle orientation position, as long as it does not change in 5a. Therefore, it is sufficient that the C-axis coordinate position α is constant for each spindle 3a, 5a. For example, if the first spindle 3a is set to α =
40°, second spindle 5a is at α=60°, and if the chuck claws of spindles 3a, 5a interfere during transfer, both spindles 3a, 5a should be moved to the same angular position I (for example, both spindles 3a, 5a Both α=40°
) to prevent interference with the chuck jaws.

Further, the main control section 12 shown in FIG. 1 instructs the C-axis control section 22 to position the spindle 5a at the delivery position CP (see FIG. 12).

Then, the C-axis control unit 22 shown in FIG. 1 rotates the spindle drive motor 5c together with the spindle 5a at low speed in the direction of arrow C or D, and detects this rotation angle amount via the transducer 5d. , based on the detected amount of rotation angle, determine the position of the spindle 5a in the directions of arrows C and D with respect to C@origin CZP shown in FIG.
The rotation of the spindle drive motor 5c is stopped when the reference position SP2 of a is positioned at the transfer position y71CP, which is separated from the origin CZP by a predetermined angle α in the direction of the arrow C. Then, the spindle 5a stops rotating in the direction of arrow C or D and is positioned at the delivery position CP.

In this way, each reference position 1asP1 of the spindles 3a, 5a
．． When 8P2 is positioned at the transfer position CP, loosen the chuck 5b attached to the spindle 5a shown in FIG. 5, and in this state, move the headstock 5 together with the spindle 5a in the direction of the arrow in FIG. The spindle 5a and the spindle 3a are moved to approach each other, and in this state, the portion of the workpiece 36 that has undergone the first step is inserted into the chuck 5b. In this state, the chuck 5b is tightened and the workpiece 36 is held by the chucks 3b and 5b.

When the workpiece 36 is held by the chucks 3b and 5b, the holding relationship between the workpiece 36 and the chuck 3b is released, and the headstock 5 is moved in this state.

With the chuck 5b holding the workpiece 36, arrow B
The spindles 3a and 5a are separated by moving a predetermined distance in the direction, that is, in the direction away from the headstock 3. Then, the workpiece 36 is moved from the spindle 3a side to the spindle 5.
It will be transferred to the a side via the chuck 5b. Note that this work 36 is transferred to the spindle 3a.

5a are respectively positioned at predetermined delivery positions ICP, and the workpiece 36 is directly held by the chuck 5b attached to the spindle 5a while maintaining the C-axis angular position of both spindles 3a and 5a. , The transfer operation does not cause a phase shift of the workpiece 36 with respect to C@the origin CZP.

In this way, when the workpiece 36 on which the first step has been completed is transferred to the spindle 5a side, the workpiece 36 is processed in the second step based on the carnivorous program PRO corresponding to the workpiece 36, and the spindle 3a
An unprocessed workpiece 36 is mounted on the side via the chuck 3b, and the unprocessed workpiece 36 is subjected to the first
Perform processing of the process.

At this time, the turret head 26a of each tool rest 26, 27,
27a are arranged rearward to each other, and the tools are arranged so as to be able to face the corresponding headstocks 3.5, so that the tool rests 26, 3, and 3, and the tool rests 27a
and the headstock 5 can operate independently of each other. As a result, no matter what state the headstock 5 and the tool rest 27 are in, that is, even if the workpiece 36 that has just completed the first process ψ transferred from the spindle 3a side is being processed, the headstock 5 and the tool rest 27 are On the 3 side, the unprocessed workpiece 36 is mounted on the chuck 3b (if necessary, even setup work such as replacing the tool 29 with respect to the turret head 26a of the tool rest 26) is carried out, and the state of the headstock 5 and the tool rest 27 is checked. This can be done independently of this, and there is no need to stop operation on the headstock 5 side.

That is, the main control section 12 shown in FIG.
Then, the spindle 5a is instructed to rotate in the direction of arrow C at a predetermined rotational speed NB.

Then, the 1 rotation speed control section 25 controls the spindle drive motor 5.
c is rotated together with the spindle 5a in the direction of arrow C.

At this time, the rotation speed control unit 25 detects the rotation speed of the spindle drive motor 5c via the transducer 5d, and controls the spindle drive motor 5G so that the detected rotation speed becomes a predetermined rotation speed NB. Control.

In addition, the main control unit shown in FIG. Move in direction A or B (Z-axis direction). At this time, the feed drive motor control section 20 detects and outputs the amount of movement of the headstock 5 via the transducer 9a, and calculates the amount of movement based on the detected amount of movement.

Controls the drive motor 9. Further, the main control section], 2 drives the tool post control section 40 to control the tool post 27 shown in FIG.
is appropriately moved and driven in the directions of arrows G and H together with a turning tool 29, thereby turning the outer diameter portion of the work 36 into a predetermined shape using the tool 29.

Moreover, as already mentioned, for the unprocessed workpiece 36 held by the chuck 3b shown in FIG. At the same time, the tool rest 26 is moved to the turning tool 2.
Arrow G along with 9.

A predetermined turning process is performed by appropriately moving and driving in the H direction (X-axis direction).

At this time, the turret head 26a of each tool rest 26, 27,
27a are arranged behind each other, and their tools are arranged so as to be able to face the respective headstocks 3.5, so that the double-edged anastomoses 26, 27 can be used together to separate the headstocks 3.5. Even if simultaneous machining is performed using 5, the tools 29 on the turret head 268° 27a will not interfere with each other, and the ambidextrous spindle 3.5 and the tool rest 26.2 will not interfere with each other.
Simultaneous machining by 7 is carried out smoothly.

In this way, each outer diameter portion of these workpieces 36, 36 is
As shown in the figure, after each turning process has been performed, the tool rests 26 and 27 are moved and retracted from the workpiece 36.36 in the direction of arrow G, and in this state, the tool for internal turning mounted on the tool rest 26.27 is removed. 29.29 to a position facing each workpiece 36. Next, the tool rest 26.27 is
Each is fed a predetermined distance in the direction of arrow H in Fig. 8,
A tool 29 for internal turning is placed on each unprocessed workpiece 36.
The right end surface in the figure is opposed to the left end surface in the figure of the workpiece 36 that has undergone the first process, and in this state, move the headstock 3.5 in the directions of arrows A and B (Z-axis direction), respectively. The inner diameter portions of the unprocessed workpiece 36 and the workpiece 36 that has undergone the first step are processed into a predetermined shape. After the machining, move the headstock 3 in the direction of the six arrows.

Move the headstock 5 appropriately in the direction of arrow B, and move the tool rest 26.
Each tool 29 attached to 27 is taken out from each inner diameter part,
In this state, the tool rests 26 and 27 are moved in the direction of arrow G to retreat from the workpiece 36, etc., and further the chucks 3b and 5
Stop the rotation of b in the direction of arrow C.

Next, in this state, the workpiece 36 that has undergone the first process and is held by the chuck 5b shown in FIG. Performs drilling with axis control.

That is, the main control section 12 shown in FIG. 1 drives the C-axis control section 22 to drive the spindle drive motor 5c.
a, rotate it at low speed in the direction of the arrow. Then, the reference position SP2 of the spindle 5a shown in FIG. 12 also rotates in the direction indicated by the arrow, and when the reference position SP2 coincides with the C Kashiwa origin CZP, the origin detection signal is sent from the transducer 5d shown in FIG. O82 is output to the C-axis control section 22.

Note that, as shown in FIG. 12, when the reference position SP2 of the spindle 5a coincides with the C2 origin C2P, the groove 36 drilled in the workpiece 36 during the first step machining
a and 36b are rotation angle amounts θ1 and (θ
1+02). Furthermore, the C-axis control unit 22 controls the spindle 5a detected via the transducer 5d from the time when the origin detection signal O82 is input.
When the amount of rotation angle in the direction of the arrow reaches a predetermined angle θ3, the spindle drive motor 5c is stopped.

Then, the spindle 5a has its reference position SP2 at C@
It is positioned at a position separated from the origin CZP by a predetermined angle θ3 in the direction of the arrow in FIG.

Next, in this state, the tool rest 27 shown in FIG.
The headstock 5 is moved by a predetermined distance in the direction of arrow H, and the headstock 5 is further driven to move in the six directions of arrows as appropriate. Then, as described above, the workpiece 36 is moved to the first position on the spindle 3a side.
After the process has been processed, the workpiece 36 is transferred to the spindle 5a without any phase shift, so the hole 36c is drilled in the first process and is indicated by the broken line in FIG. From the shown grooves 36a and 36b, a predetermined angle θ3. The holes are drilled through the holes at a distance of (θ2+03).

In this way, when the second step of machining the workpiece 36 is completed, the chuck 5b is loosened, the machined workpiece 36 is removed from the chuck 5b, and the workpiece 36 is removed from the chuck 5b.
is discharged to the work catcher 37 in the lower part of FIG. In parallel, the workpiece 36 held by the chuck 3b shown in FIG. Milling is performed to form grooves 36a and 36b shown in FIG. 11 in the workpiece 36. In this way, the workpiece 36 is continuously processed by performing the first step and the second step in parallel.

In the embodiment described above, when transferring the workpiece 36 from the spindle 3a side to the spindle 5a side, the headstock 5 is moved together with the spindle 5a in the six directions of the arrows toward the spindle 3a of the headstock 3. , the case where the workpiece 36 is delivered has been described. However, the transfer method is not limited to this, and the spindles 3a and 5a are brought close to each other by relatively moving the headstock 3.5 in the directions of arrows A and B (Z-axis direction), and the workpiece 36 is moved in that state. Any method may be used as long as it is possible to transfer the headstock 3 to the spindle 3.
It may be moved along with the spindle 3a in the direction of arrow B toward the spindle 5a, and transferred from the spindle 3a side to the spindle 5a side.

Further, by moving the headstock 3 in the direction of arrow B and the headstock 5 in the direction of arrow 6, the spindles 3a and 5a may be brought close to each other, and the workpiece 36 may be transferred in this state.

Note that in the embodiment described above, the work transfer program WT stored in the system program memory 16
Based on P, spindle 3a.

Although the case where the workpiece is transferred between the spindles 3a and 5a has been described, any method may be used as the command for transferring the workpiece as long as the workpiece 36 can be directly transferred between the spindles 3a and 5a.

For example, the Canadian program memory 15 may store a Canadian program PRO created including the contents of the work transfer program WTP, and the work transfer operation may be performed based on the Canadian program PRO. Of course.

In addition, as in this embodiment, by arranging the turret heads 26a and 27a of the tool rest 2'6.27 from the rear and setting the rotation center parallel to the main axis direction (Z-axis direction), The distance between both turret heads 26a, 27a in the biaxial direction can be minimized without creating wasted space that does not interfere with machining operations. Therefore, if the maximum distance between the headstocks 3 and 5 of the machine tool in the two axial directions is the same, it is possible to secure the maximum machinable area.

(g) 0 Effects of the Invention As described above, according to the present invention, the first and second spindles facing each other and rotatably provided (for example, the first spindle is connected to the spindle 3a, the second spindle is a spindle 5a), and a spindle drive motor 3 is provided for each of the first and second spindles.
A rotation drive means such as a C150 is connected to drive the spindle in rotation, and a feed drive means such as a feed instant motor 7.9 is connected to drive at least one of the first and second spindles in two axial directions. A memory means such as a computer program memory 15 and a system program memory 16 are provided, which are connected to the rotary drive means so as to be able to move and drive, and which store workpiece transfer commands, such as a computer program memory 15 and a system program memory 16. Driving and controlling the rotational drive means to rotate the first
and main shaft control means such as a C-axis control unit 21, 22 for positioning the second spindle at a delivery angle position such as a predetermined delivery position CP by main shaft control such as C-axis control,
Furthermore, the feed drive means is drive-controlled based on the workpiece transfer command, so that the first and second
The spindles of the two spindles are moved relatively toward and away from each other. Since the feed drive control means such as the feed drive motor control unit 19 and 20 are connected to each other, the angular position of the first and second spindles in the C-axis direction is maintained while being held by the first spindle. The workpiece 36 can be directly transferred to the second spindle without using a handling robot or the like. As a result, work 36.

The workpiece 36 is transferred from the first spindle side to the second spindle side without causing a phase shift on the C-axis, and after the transfer is completed, the workpiece 36 is subjected to milling processing or the like with C-axis control. It becomes possible to perform processing with high precision.

[Brief explanation of the drawing]

FIG. 1 is a control block diagram showing an embodiment of the opposed spindle lathe according to the present invention, FIG. 2 is a plan view of the opposed spindle lathe shown in FIG. 1, and FIGS. 3 to 10 are the opposed spindle lathe according to the present invention. 11 is a view of the workpiece in the direction of the Q arrow in FIG. 5; FIG. 12 is a view of the workpiece in the direction of the R arrow in FIG. 9. . l...Opposed spindle lathe 3a...First spindle (spindle) 3c
, 5c... Rotation drive means (spindle drive motor) 5a... Second spindle (spindle) 7.
9...Feed drive means (feed drive motor) 15.
. . . Memory means (cannibal program memory) 16. . . Memory means (system program memory) 19. 20 . . . Feed control drive means (feed drive motor control section) 21. 22... Spindle control means (C-axis control section) P
RO...Canada program cp...Delivery position Applicant Yamazaki Mazak Co., Ltd. Agent Patent attorney Phase 1) Shinji (1 idiot)

Claims (1)

[Scope of Claims] First and second spindles are provided opposite to each other and are rotatably provided, and each of the first and second spindles includes a rotational driving means for rotationally driving the spindle. and a feed drive means is connected to drive at least one of the spindles to move in the Z-axis direction, and a memory means storing a work transfer command is provided, and the rotation drive means is connected to A spindle control means is connected to the feed drive means for drive-controlling the rotary drive means based on the work transfer command to position the first and second spindles at predetermined transfer angle positions by spindle control, and further connected to the feed drive means. , drive-controls the feed drive means based on the work transfer command, and controls the first and second
A feed drive control means for relatively approaching and separating the first spindles is connected, a workpiece is held on the first spindle, the workpiece is processed in this state, and the workpiece stored in the memory means is Based on the delivery order,
performing an approach positioning operation comprising a step of relatively approaching the second spindle with respect to the first spindle, and a step of positioning the first and second spindles at predetermined transfer angle positions by spindle control; a first step of holding the workpiece held by the first spindle by a second spindle; then, a second step of releasing the holding relationship between the workpiece and the first spindle in that state;
The opposing spindle further comprises a third step of moving the second spindle away from the first spindle and holding the workpiece on the second spindle side. lathe.