JPH01289604A - Machining control method in machine tool for composite machining - Google Patents

Abstract

PURPOSE:To enhance machining efficiency by synchronously rotating first and second spindle stocks with a work held thereon, after the completion of a first process, cutting-off the work, and delivering a part, where the first process is completed, to the second spindle stock. CONSTITUTION:Upon completing a first process for a bar work 20 held by means of the chuck 3b of a first spindle stock 3, a second spindle stock 5 approaches so that a chuck 5b holds one end thereof, the chuck 3b is released, and the second spindle stock 5 is separated therefrom, thereby drawing out the bar work 20 by a predetermined length. The chuck 3b is fastened, and with both spindle stocks 3 and 5 rotated synchronously, a part 20a cut-off by means of the bite of a first tool rest 13 so as to be held by the second spindle stock 5 and retreated by a predetermined distance. With this state kept intact, the bar work 20 held by the first spindle stock 3 and the part 20a held by the second spindle stock 5 are machined in first and second processes by means of bites fixed on first and second tool rests 13 and 15, respectively. This enables improvement in machining efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a machining control method in a multi-tasking machine tool having two headstocks facing each other.

(b), Prior Art Normally, when machining a workpiece using a lathe with two headstocks facing each other, the workpiece is held by a chuck on one spindle, and the workpiece is held in that state. Perform the first process. When the first process is completed, the workpiece is separated from the other unprocessed parts, and the separated part is transferred to the chuck on the other headstock by the operator, and in that state. A second process is performed on the workpiece to produce a large number of parts of a predetermined shape.

(C) 0 Problems to be Solved by the Invention However, in this case, the first process completed part of the workpiece after the first process is completed,
The second step cannot be carried out unless the operator changes the chuck to the other headstock, which has the disadvantage that the workpiece cannot be machined without manual intervention.

In addition, when a multi-tasking machine tool having opposing spindles and stands is used for such machining, the turrets provided corresponding to each headstock become an obstacle to setup work such as workpiece setup, resulting in a deterioration in work efficiency. Not only that, but when setting up one headstock, the operation of the other headstock must be stopped, making it impossible to operate the other headstock. Furthermore, if it is attempted to ensure a relative movement range of each tool rest with respect to the headstock in the direction of the spindle axis, there is a disadvantage that the size of the entire machine in the direction of the spindle axis becomes large.

In view of the above circumstances, the present invention relates to a workpiece.

Parts of a predetermined shape can be manufactured continuously by performing the first and second steps without human intervention.
The first objective is to provide a machining control method for a multi-tasking machine tool.

In addition, the present invention has good accessibility to the headstock when setting up a workpiece, and when setting up one headstock, there is no need to stop the operation of the other headstock, and there is no need to stop the operation of the other headstock. A second object of the present invention is to provide a machining control method for a multi-tasking machine tool that can reduce the size in the center direction.

(d) Means for solving the first problem, that is, the invention of the first method of the present invention is to move the first tool rest (13) at least to the main spindle corresponding to the first head stock (3). Provided to be freely movable and driven in a direction perpendicular to the axis,
Corresponding to the second headstock (5), a second tool rest (15) is provided so as to be movably driven at least in a direction perpendicular to the spindle axis.

The first and second tool rests are arranged on the same side with respect to an axis connecting the first and second headstocks, and
Tool holding means (13a) on the tool rest.

15a) are provided so as to be freely indexable and rotatable about an axis parallel to the spindle axis, and are arranged rearward to each other, and each tool is mounted on the tool holding means of the first and second tool rests. The second headstock (5) is provided in a shape that corresponds to the headstock and can be opposed to each headstock side, and the second headstock (5) is connected to the first headstock (3) before cutting off the workpiece (20).
The workpiece (2) is moved by a predetermined distance relatively toward
0) is held by the first and second headstocks (3, 5), and in this state, the first and second headstocks (3, 5) are held synchronously. By rotating the part (20a), the workpiece (20) is cut through.
is held from the first headstock to the second headstock.
step, and further executes a third step of relatively moving the second headstock (5) together with the part (20a) to a position separated by a predetermined distance from the first headstock (3). In this state, the first process is performed on the workpiece (20) held on the first headstock (3).
At the same time as executing the fourth step, a fifth step is executed in which the part (20a) held on the second headstock (5) is processed in the second process, and further, from the first step During the fourth step, the workpiece (20) is
It is configured to feed out a predetermined length from the first headstock (3).

Further, in the second method of the present invention, the first tool rest (13) is driven to move relative to the first head stock (3) at least in a direction perpendicular to the spindle axis. Set up freely,
A second tool rest (15) corresponding to the second headstock (5) is provided so as to be movable and driven at least in a direction orthogonal to the spindle axis, and the first and second tool rests are connected to the second tool rest (15). A tool holding means (13a) is disposed on the same side with respect to the axis connecting the first and second headstocks, and is attached to the first and second tool rests.

15a) are provided so as to be freely indexable and rotatable about an axis parallel to the spindle axis, and are arranged rearward to each other, and each tool is mounted on the tool holding means of the first and second tool rests. The second headstock (5) is provided in a shape that corresponds to the headstock and can face the respective headstock sides, and the second headstock (5) is connected to the first headstock (3) before cutting off the workpiece (20).
) relative to the workpiece (
20) is held by the first and second headstocks (3, 5), and in this state, the holding relationship between the first headstock (3) and the workpiece (20) is released, and the In this state, the second headstock (5) is relatively moved to a position a predetermined distance away from the first headstock (3), and the workpiece (
20) by a predetermined length from the first headstock (3), and in that state, by the first and second headstocks (3, 5).

By holding the workpiece (20) and rotating the first and second headstocks (3, 5) synchronously, the workpiece (20) is cut off and the second headstock (5) is rotated. hold in
Further, the second headstock (5) is relatively moved together with the part (20a) to a position a predetermined distance away from the first headstock (3).

In this state, the workpiece (
20), the first process is carried out, and the second
The second process is performed on the part (20a) held on the headstock (5) of the machine.

The numbers in parentheses are for convenience, indicating corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings.
The same applies to the column ``, action''.

(e) 1 Effect In the first method of the present invention, after the first step is completed, the workpiece (20) is held by the first and second headstocks (3, 5) and held in that state. 1st and 2nd headstock (3, 5
) by rotating them synchronously.

The workpiece (20) is cut off to separate the part (20a) including the first-processed part, and the part (20a) is held by the second headstock (5).

Further, in the second method of the present invention, after the first step is completed, the workpiece (20) is moved by the second headstock (5).
Pull out the workpiece (2o) by a predetermined length from the first headstock (3), and in that state transfer the workpiece (2o) to the first and second headstocks (3, 5).
) held by.

Furthermore, the first and second headstocks (3, 5) are rotated synchronously to cut through the workpiece (20) and separate the part (20a), and the part (20a) is transferred to the second headstock ( 5)
It acts to hold it.

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

FIG. 1 is a diagram showing the main parts of a multi-tasking machine tool to which an embodiment of the machining control method for a multi-tasking machine tool according to the present invention is applied, and FIG. 2 is a diagram showing the main parts of a multi-tasking machine tool to which an embodiment of the present invention is applied. A plan view of the machine tool.

FIG. 3 shows the main parts of another multi-tasking machine tool to which an embodiment of the present invention is applied. Figures 12 to 18 are diagrams showing how a long and narrow shaft work is machined using the multi-tasking machine tool shown in Figure 1. Figures 19 and 20 are diagrams showing how a bar work is machined. FIG. 2 is a diagram showing how bar feeder machining is performed using the multi-tasking machine tool shown in FIG. 1;

A multi-tasking machine tool 1 is shown in FIG.

It has a machine body 2 with a guide surface 2a provided on the upper part, and two headstocks 3.5 are placed on the guide surface 2a facing each other, and each of the main spindles 3.5 (Fig. (not shown), which is the axial direction of arrows A and B, that is, the Z-axis direction).

On the headstock 3.5, chucks 3b and 5b, each mounted on a main shaft (not shown), are provided so as to be rotatable and freely in the directions of arrows C and D. 17, chucks 3b on both left and right ends in the figure;
5b, and is rotatably mounted in the direction of arrow C1D.

Furthermore, at the lower end of the headstock 3.5 in FIG.
Z-axis direction).
C15C has 1ljll screws (not shown)
It is threaded to penetrate in the axial direction.

In addition, as shown in FIG. 1, one machine body 2 is provided with a headstock drive device 6, and the headstock drive device 6 is composed of a drive motor 7.9, a drive screw 10.11, a clutch 12, etc. has been done. That is.

The drive motor 7.9 is provided at both left and right ends of the fuselage 2 in FIG. It is connected to the. The aforementioned nuts 3C15c are screwed into each of the drive screws 10.11, and by driving the drive motor 7.9 and rotating the drive screws 10.11 in the direction of arrow E or F, the headstock 3 , 5 are driven to move in the direction of arrow A or B (Z-axis direction) via nuts 3c and 5c, respectively.

Further, as shown in FIG. 1, gears 10a and lla are fixed to the tips of the drive screws 10.11, respectively, and a clutch 12 is connected between the drive screws 10.11. 10.11. The clutch 12 has a shaft 12a that is rotatable in the directions of arrows E and F and movable in the directions of arrows A and B (Z-axis direction). Gears 12b and 12C are fixed to these, respectively.

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 13 and 15.
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.

The tool rests 13 and 1.5 are provided with turret heads 13a and 15a, respectively, so as to be freely movable and driveable, and in a form corresponding to the respective headstocks 3 and 5.

Arrow 1. is centered around the rotation center axis parallel to the Z axis. It is supported so that it can be rotated freely in the J direction. Turret head 13a
, 15a is entirely formed into a polygonal cylindrical shape, and on its side, a plurality of tools 16 including turning tools such as bits and rotary tools such as drills and milling cutters are mounted on each headstock 3.5. It is set up in a corresponding manner. In addition, each tool is provided in such a way that it can face the corresponding headstock side.
Therefore, the tools mounted on the respective turret heads 13a, 15a do not interfere with each other due to the turning operation of the turret heads 13a, 1.5a. Also.

Each turret head 13a, 15a has its sides facing each other, so that each turret head 13a, 15a
is arranged rearward to the tool rest 13.15.

Since the multi-tasking machine tool 1 has the above configuration, as shown in FIG. 1, in order to machine a long workpiece 17, both left and right ends of the workpiece 17 in the figure are chucked with chucks 3b, 5b. At this time, the turret 13.
15 are located on the upper side of the headstock 3.5 in FIG. 2, that is, on the rear side of the machine body 2, so that the chuck 3
b.

Tool 16 for installation work on 5b and tool rest 13.15
The setup work can be carried out smoothly without being obstructed by the tool rests 13 and 15 from the lower side in the figure where the tool rests are not arranged, and the chuck 3b is easily accessible. When the workpiece 17 is thus supported between the chucks 3b and 5b, the tool rest 13.15 shown in FIG.
The turret heads 13a, 15a are appropriately rotated in the arrow direction or J direction to index and position the tool 16 to be used for machining at a position facing the workpiece 17.

Next, in this state, the chucks 3b and 5b are driven to rotate in the direction of arrow C or D synchronously with the workpiece 17, and then
The clutch 12 shown in the figure is moved a predetermined distance to the left in the figure from the position indicated by the solid line in the figure. Then clutch 1
Gears 12b and 12c constituting the drive screw 10.11 are gears 10a and 10a fixed to each tip of the drive screw 10.11, respectively.
In mesh with the drive screw 10.11, the gear 10a, ll
a and a clutch 12.

Next, in this state, one of the drive motors 7.9 shown in FIG. 1, for example.

While the drive motor 9 is stopped, the other drive motor 7 is driven. Then, the drive screw 10 is connected to the drive motor 7
, it rotates in the direction of arrow E or F together with gear lOa. When gear loa rotates in the direction of arrow E or F, clutch 12 rotates in the direction of arrow F or E via gear 12b that meshes with gear 10a. Then, drive screw 11
rotates in the direction of arrow E or F in FIG. 1 via gear lla that meshes with gear 12c of clutch 12. In addition.

At this time, since the number of teeth of gear 10a and gear lla and the number of teeth of gear 12b and gear 12c are the same, the drive screw 10.11 rotates in the same rotational direction and rotational angular velocity. For this reason, the headstock 3.5 is appropriately moved synchronously in the direction of the arrow A or B (Z-axis direction) via the nuts 3c, 5c which are threadedly engaged with the drive screws 10.11, respectively.

In this way, the headstock 3.5 shown in FIG. 1 is synchronously moved in the directions of arrows A and B (Z-axis direction), and the tool rest 13.15 shown in FIG. By appropriately moving and driving the workpiece 17 in the H direction (X-axis direction), a predetermined process is performed on the workpiece 17.

In the embodiment described above, the two headstocks 3 and 5 facing each other are synchronously moved in the directions of arrows A and B (i.e., in the Z-axis direction) using the headstock drive device 6 shown in FIG. ), but the headstock drive device 6 is not limited to this, and can be configured in any manner as long as the headstock 3.5 can be moved synchronously in the Z-axis direction. Good, below,
Using the headstock drive device 6 shown in FIG.
He is an expert in driving and moving synchronously in two axes. Note that the same parts as those explained in FIGS. 1 and 2 are designated by the same reference numerals.

The explanation of that part will be omitted.

That is, a rotary encoder 21.25 is attached to each tip of the drive screw 10.11 constituting the headstock drive device 6 of the multitasking machine tool shown in FIG. , disks 21a and 25a each provided with a large number of magnetic and optical marks (not shown).
In the lower part of FIG. 3 of the zero disks 21a and 25a having
Sensors 21b and 25b for reading marks, respectively
The rotary encoder 21 is connected to the rotation angular velocity amount detection section 22, and the one rotation angular velocity amount detection section 22 is connected to the drive motor control section 23.
The drive motor control section 23 is.

It is connected to the drive motor 9. Further, a rotary encoder 25 attached to the tip of the drive screw 11 is connected to a rotational angular velocity amount detection section 26 , and the rotational angular velocity amount detection section 26 is connected to the drive motor control section 23 .

In order to process a long workpiece 17 using the multi-tasking machine tool 1 shown in FIG.
5b, and the tool rest 13 shown in FIG.
．． 15 turret heads 13a, 15a are rotated appropriately in the direction of arrow I or J to remove the tool 16.1 used for machining.
6 is indexed and positioned at a position facing the workpiece 17. In this state, the chucks 3b and 5b are rotated synchronously with the workpiece 17 in the direction of arrow C or D, and the drive motor 7 shown in FIG.
Or rotate it appropriately in the F direction.

Then, the headstock 3 is moved together with the chuck 3b and the nut 3c.
A disk 21 that moves in the direction of arrow A or B (i.e., the Z-axis direction) and constitutes the rotary encoder 21.
a also rotates in the direction of arrow E or F together with the drive screw 10. Then, the sensor 21b reads the mark on the disk 21a and sends it to the rotational angular velocity amount detection section 22.

In response to this, the rotational angular velocity amount detection unit 22 detects the drive screw 10.
The amount of rotational angular velocity in the direction of arrow E or F in FIG.

Then, the drive motor control unit 23 receives this and drives the drive motor 9 to move the drive screw 11 in the same direction as the drive screw 10 and at the same rotational angular velocity as the arrow E.
Or rotate it in the F direction. Therefore, the headstock 5 moves together with the chuck 5b in the direction of arrow A or B (Z-axis direction) synchronously with the headstock 3 via the nut 5c.

At this time, the disc 25a of the rotary encoder 25 shown in FIG. 3 also rotates in the direction of arrow E or F together with the drive screw 11. Then, the sensor 2 detects the mark on the disk 25a.
5b reads it and sends it to the rotational angular velocity amount detection section 26. The rotational angular velocity amount detection section 26 receives this and sends it to the rotational angular velocity amount detection section 26.
The amount of rotational angular velocity in the directions of arrows E and F of No. 1 is detected, and the amount of rotational angular velocity is output to the drive motor control section 23 . Then, the drive motor control unit 23 compares the amount of rotational angular velocity with the amount of rotational angular velocity of the drive motor 7 outputted from the rotational angular velocity amount detection unit 22, and drives the drive signal corrected so that the deviation becomes zero. Output to motor 9. The drive motor 9 is
In response to this, the drive screw 11 is rotated in the direction of arrow E or F. Therefore, the rotational angular velocity of the 1M dynamic screw 10.11 is kept the same, and the workpiece 17 is kept between the chucks 3b and 5b.
When the headstock 3.5 is supported in the direction of arrows A and B (
The synchronous movement in the Z-axis direction is performed smoothly.

In this way, the headstock 3.5 shown in FIG. 3 is moved together with the workpiece 17 in the directions of arrows A and B (Z-axis direction), and the tool rest 13.15 is moved together with the tool 16.16 in the direction of arrow G. , H direction and X-axis direction),
Each tool 16 processes the workpiece 17 into a predetermined shape.

Next, a case will be described in which a bar work is machined using the machining control method for a multi-tasking machine tool according to the present invention. That is, in order to process the bar work 20 shown in FIG.
The bar work 20 is pushed out in the direction of arrow B by a bar feeder device (not shown) through a chuck 3b mounted on the headstock 3, and the bar work 2 to be processed in the first step is
The chuck 3b is tightened to hold the chuck 3b in a state in which the tip portion in the figure of o protrudes from the chuck 3b in the direction of arrow B.Then, the turret head 13a of the tool rest 13 is
The tool 16 for external turning is positioned at a position facing the bar work 20 by appropriately rotating it in the direction shown by the arrow or J in the figure. Next, in this state, the chuck 3b is rotated together with the bar work 20 in the direction of the arrow C. let When the bar work 20 rotates in the direction of arrow C, the drive motor 7 shown in FIG.
is driven to rotate the drive screw 10 as appropriate in the direction of arrow E or F, and move the headstock 3 as appropriate in the direction of arrow A or B (Z-axis direction) via the nut 3c.

At the same time, the tool rest 13 shown in FIG. 4 is moved and driven in the directions of arrows G and H (X-axis direction) together with the tool 16, so that the tool 16 turns the outer diameter part of the bar work 20 into a predetermined shape. Process.

After the outer diameter portion of the bar work 20 has been turned as shown in FIG. The turret head 13a is appropriately rotated in the direction of the arrow I or J, and the tool 16 for internal turning, such as a drill or a boring rebit, is positioned at a position facing the bar work 20. Next, in that state, set the tool rest 13 and the tool 16.
At the same time, it is fed a predetermined distance in the direction of arrow H in FIG. 5 to face the right end surface of the bar work 20 in the figure.

In that state, attach the headstock 3 to the chuck 3b with the bar work 20.
While holding the bar workpiece 20 , the bar workpiece 20 is moved and driven as appropriate in the directions of arrows A and B (Z-axis direction), and the inner diameter portion of the bar work 20 is machined using the tool 16 . In addition, at this time, the turret head 13a of the tool rest 13 is placed in the second position of the tool rest 13 so that the turret head 13a of the tool rest 13 is positioned farthest from the corresponding headstock 3 in the Z-axis direction.
It is attached to the right side of the figure, as shown in Fig. 5.

Even if an internal turning tool 16 protruding in the Z-axis direction is used,
A sufficient machining stroke in the Z-axis direction can be secured between the tool rest 13 and machining can be performed smoothly.

When the inner diameter part of the bar work 20 has been machined as shown in FIG. 5, move the headstock 3 appropriately in the direction of the arrow to take the tool used for machining out of the inner diameter part, and in this state, Move the tool rest 13 in the direction of arrow G and bar work 20
When the turret 13 is retracted, move the turret head 13a in the direction of arrow 1. Position the tool 16, such as an end mill, at a position facing the bar work 20 by appropriately rotating it in the J direction. 6. Next, stop the rotation of the chuck 3b in the direction of arrow C, and drive the tool 16 to rotate, and in that state. Milling is performed on the bar work 20 by feeding the tool rest 13 a predetermined distance in the direction of arrow H in FIG. 6 and moving the headstock 3 appropriately in the directions of arrows A and B (Z-axis direction).

Note that it is also possible to appropriately rotate the chuck 3b of the headstock 3 in the directions of arrows C and D by C-axis control, and perform milling in this state.

In addition, after milling, move the tool rest 13 to the bar work 2.
0 in the direction of arrow G, and in this state, the cutting tool 16 is positioned at a position facing the bar work 20.

In this way, when the first step of machining has been performed on the tip end of the bar work 20, the chuck 3b shown in FIG.
is released to release the holding of the bar work 20, and in this state, a bar feeder device (not shown) is operated to push out the bar work 2o by a predetermined length in the direction of arrow B via the chuck 3b. When the workpiece 20 has been pushed out by a predetermined length from the chuck 3b, the chuck 3b is tightened to hold the bar workpiece 20. Next, in this state, the chuck 5b of the headstock 5 is loosened, and the tool rest 5 is further tightened. It is moved toward the bar work 20 in the direction of arrow A in FIG. 6, and the tip end of the bar work 20 in the figure is fitted into the chuck Sb. In this state, tighten the chuck 5b and press the bar work 20.
is held by the headstock 3.5.

Next, move the headstocks 3 and 5 along with the bar work 20 to arrows A and B.
5. Move the bar work 2o appropriately in the direction (Z-axis direction).
The cutoff tool 16 mounted on the tool rest 13 is placed opposite to the part to be cut.

In that state, each chuck 3b, 5b of the headstock 3.5 is
The bar work 20 is synchronously rotated together with the bar work 20 in the direction of the arrow C, and the tool rest 13 is fed by a predetermined amount in the direction of the arrow H.
A part (hereinafter referred to as part 20a) including a part that has undergone the first process and an unprocessed part that is scheduled to undergo the second process.

) is separated from the other unprocessed parts of the bar work 20.

In this way, when the part 20a is separated as shown in FIG.
While holding the part 20a in the direction of arrow B,
0 to move a predetermined distance in the direction away from the headstock 3
Next, the rotation of the chuck 3b in the direction of arrow C is stopped, and in this state, the chuck 3b is loosened. Next, the bar feeder 20 is operated by operating the bar feeder device.

Push out from chuck 3b in the direction of arrow B, and bar work 2
0 is made to protrude from the chuck 3b by a predetermined length in the direction of arrow B, and in this state, the chuck 3b is tightened to hold the bar work 20.

At this time, the turret head 13a of each tool rest 13.15,
15a are arranged behind each other, and the tools are arranged so as to be able to face the respective headstocks 3.5, so that the tool rest 13, the headstock 3, and the tool rest 15
and the headstock 5 can operate independently of each other. As a result, no matter what state the headstock 5 and the tool post 15 are in, that is, the first process passed from the chuck 3b to the receiver is completed and the cut part 20a is being processed. However, the feed operation of the bar work 20 relative to the chuck 3b is controlled on the headstock 3 side (if necessary, the feed operation of the bar work 20 is
Even the setup work such as exchanging the tool 16 for the turret head 13a of 3) can be performed regardless of the state of the headstock 5 and the tool rest 15, and there is no need to stop the operation on the headstock 5 side. .

Next, in this state, the unprocessed part of the bar work 20 is processed in the first process, and in parallel with this, the part 2
0a is processed in the second step, that is, the chuck 3b shown in FIG. , is positioned at a position facing the bar work 20. In that state, move the tool post 13 to the outer diameter turning tool 1.
6 in the directions of arrows G and H (X-axis direction), and move the headstock 3 in the directions of arrows A and B (Z-axis direction) to perform the same machining as shown in Fig. 4. do,
In parallel with the machining, the turret head L5a of the tool rest 5 is appropriately rotated in the direction of the arrow I or J to bring the tool 16 for outer diameter turning to face the part 20a, and the chuck 5 is
Rotate b together with part 20a in the direction of arrow C. Next, in that state, rotate the headstock 5 in the direction of arrows A and B (Z-axis direction).
At the same time, the tool rest 15 is appropriately moved together with the tool 16 for outer diameter turning in the directions of arrows G and H, that is, in the X-axis direction, to turn the outer diameter portion of the part 20a into a predetermined shape.

At this time, the turret head 13a of each tool rest 13.15,
15a are arranged behind each other, and the tools are arranged in such a way that they can face the respective headstocks 3.5, so that the double-edged anastomoses 13.15 are used together to separate the headstocks 3. Even if simultaneous machining is performed using 5, the tools 16 on the turret heads 13a and 15a will not interfere with each other, and both headstocks 3 and 5 and the tool rest 13.1 will not interfere with each other.
Simultaneous machining by No. 5 is carried out smoothly.

When the outer diameter portions of the bar work 20 and the part 20a are turned in parallel as shown in FIG.
turret] and 3.15 from the bar work 20 and parts 20a, respectively, and in that state remove the turret 13.15.
The tools 16, 16 for internal turning mounted on the turrets 13, 16 are positioned to face the bar work 20 and the part 20a, respectively. Next, the tool rest 13, 15 is moved along with the tool 16 for internal turning in the direction shown by the arrow in FIG. The tools 16 and 16 are fed upward by a predetermined distance to face the right end surface of the bar work 20 in the figure and the left end surface of the part 20a in the figure, respectively, and in this state, the headstock 3 is further moved in the direction of arrow A.

The bar work 20 is moved in the B direction (Z-axis direction), and the same machining as shown in FIG. 5 is performed on the bar work 20.

In addition, in parallel with the machining, the tool 16 for internal turning mounted on the tool rest 5 is made to face the part 20a, and in this state, the tool rest 5 is moved in the directions of arrows G and H (X-axis direction). At the same time, the headstock 5 is moved in the directions of arrows A and B (Z-axis direction) to perform machining.

At this time, as already mentioned, since the turret heads 13a and 15a of each tool rest 13.15 are provided facing each other as shown in FIG. The distance between each turret head 13a and 15a in the Z-axis direction can be maximized with the same body dimensions. Therefore, as shown in Fig. 9, even if the tool 16.16 for internal turning protruding in the Z-axis direction is used, a sufficient machining stroke in the Z-axis direction can be secured between the tool and each headstock 3.5. As a result, the inner diameter machining can be carried out smoothly using the single and dual tool rests 13 and 15.

Each inner diameter part of the bar work 20 and the part 20a is the 9th @
When the headstock 3 has been machined into a predetermined shape as shown in
in the direction of arrow B and the headstock 5 in the direction of arrow B to take out each tool 16 from each inner diameter part. In that state,
Move the turret 13.15 in the direction of arrow G and bar work 2
0 etc., and then move the chucks 3b and 5b by arrow C.
Stop rotation in direction.

Next, in this state, the tool rest 13 shown in FIG.
, move the bar work 2 appropriately in the B direction (Z-axis direction).
0 is milled using the tool 16. At this time, by controlling the chuck 3b along the C axis, arrows C,
It is also possible to perform milling by appropriately rotating it in the D direction. In addition, in parallel with the milling process, the other tool rest 15 is moved along the arrow H with a tool 16 such as a drill.
As shown in FIG. 10, feed the tool 16 by a predetermined amount in the direction shown in FIG. ), the part 20a is drilled using the tool 16, and the second process is performed. When the second process is completed for the part 2Qa,
The chuck 5b is loosened, the processed part 20a is removed from the chuck 5b, and the part 20a is discharged into the parts catcher 19 at the bottom of FIG. Thus, the first
By performing the step and the second step in parallel, the bar work 20 is continuously processed and a large number of processed parts are produced.

In addition, in the embodiment described above, the bar feeder device (
(not shown), the bar work 20 is
As shown in the figure, chuck 3 twice before and after cutting off.
A case has been described in which the shafts are fed out from the headstock 3 by a predetermined length in the direction of the arrow B via the shafts b. However, the time to send out the bar work 20 is not limited to this, and it is also possible to complete the sending out operation once before cutting off or after cutting off.

Further, in the embodiment described above, after the first process is completed on the bar work 20, the part of the bar work 20 that has been subjected to the first process is fed out by a bar feeder or the like in the direction of the arrow B, and is then moved by the chuck 5b. The case where the bar work 20 is cut through the bar work 20 while being held is described. However, before cutting off, it is also possible to pull out the bar work 20 by a predetermined length in the direction of arrow B using the headstock 5 without using the bar feeder device, and then cut off the bar work 20 in that state to process the bar work. That is, as shown in FIG. 6, after the first process for the bar work 20 is completed, the rotation of the chuck 3b in the direction of arrow C is stopped. Next, the chuck 5b of the headstock 5 is loosened, and in that state, the chuck 5b of the headstock 5 is loosened. The tool rest 5 is moved a predetermined distance in the direction of the arrow toward the bar work 20, and the tip of the bar work 20 is fitted into the chuck 5b. When the tip is fitted into the chuck 5b, the chuck 5b is tightened to hold the bar work 20, and the chuck 3b is loosened to release the holding relationship between the chuck 3b and the bar work 20.

In this state, the headstock 5 is moved along with the chuck 5b by a predetermined distance in the direction of arrow B, that is, in the direction away from the headstock 3. Then, the bar work 20 is pulled by the headstock 5 and the chuck 3 attached to the headstock 3
It is pulled by a predetermined length in the direction of arrow B from b. In this way, when the unprocessed portion of the bar work 20 is pulled out from the chuck 3b by a predetermined length, the chuck 3b is tightened to hold the bar work 20.

In this way, the chucks 3b and 5 mounted on the headstocks 3 and 5
When the bar work 20 is held by b, move the headstock 3.5 together with the bar work 20 in the directions of arrows A and B (Z
axially) so that the part of the bar work 20 to be cut faces the parting tool 16 mounted on the tool post 13. In that state, these chucks 3b,
5b is synchronously rotated in the direction of arrow C, the tool post 13 is sent a predetermined distance in the direction of arrow H, and the bar work 20 is cut by the cut-off tool 16, and the part 20a is separated from the bar work 20 and other parts. Separate from the unprocessed part.

Next, in order to machine the elongated shaft work 29 shown in FIG. 12 with the multitasking machine tool 1, the shaft work 29 is protruded by a predetermined length in the direction of arrow B from the chuck 3b mounted on the headstock 3. The chuck 3b
to hold. When the shaft work 29 is held by the chuck 3b as shown in FIG. 12, the chuck 3b is rotated in the direction of the arrow C or D, and the turret head 13a of the tool rest 13 is rotated in the direction of the arrow 1 or the arrow D in FIG. The turning tool 16 is positioned at a position facing the shaft work 29 by appropriately rotating it in the J direction. next,
In that state, move the headstock 3 along with the chuck 3b to arrows A and B.
direction (Z-axis direction), furthermore, the tool rest 13 is appropriately moved and driven in the directions of arrows G and H (X-axis direction).
The tool 16 is used to turn a portion of the shaft work 29 that protrudes from the chuck 3b in the direction of arrow B.

After the part of the shaft work 29 has been turned, the tool rest 13 is appropriately moved in the direction of arrow G to retreat from the shaft work 29. Next, the chuck 5b mounted on the head stock 5 shown in FIG. 12 is removed. loosen the workpiece holder 5d, and in that state move the headstock 5 together with the chuck 5b a predetermined distance in the direction of arrow A toward the headstock 3, and move the machined part of the shaft workpiece 29 onto the workpiece holder 5d. Insert it inside. When the processed part is fitted into the workpiece holding part 5d, tighten the workpiece holding part 5d,
While holding the processed portion, the work holding portion 3b of the chuck 3b is loosened to release the holding relationship between the chuck 3b and the shaft work 29.

In this state, the headstock 5 is moved along with the chuck 5b by a predetermined distance in the direction of arrow B, that is, in the direction away from the headstock 3. Then, the five-shaft workpiece 29 is pulled by the headstock 5 and pulled out from the chuck 3b attached to the headstock 3 by a predetermined length in the direction of arrow B, as shown in FIG. In this way, when the unprocessed portion of the shaft work 29 is pulled out from the chuck 3b by a predetermined length, the work holding portion 3d of the chuck 3b is tightened to hold the shaft work 29.

In this state, the chucks 3b and 5b shown in FIG. 13 are synchronously rotated in the direction of arrow C, and the turret head 15a of the fifth tool rest 15 is appropriately rotated in the direction of arrow I or J to be used for machining. Tool 16, shaft work 29
Next, the headstock 3.5 is appropriately moved synchronously in the directions of arrows A and B (Z-axis direction), and the tool rest 15 is moved along with the tool 16 in the directions of arrows G and H (
X-axis direction) and move it from the chuck 3b to arrow B.
The unprocessed portion of the shaft work 29 pulled out in the direction (excluding the unprocessed portion near the chuck 3b) is subjected to turning processing.

After the unmachined portion has been turned, the tool rest 15 is appropriately moved in the direction of arrow G to retreat from the shaft work 29, as shown in FIG. The tool 16 used for machining is positioned at a position facing the shaft work 29 by appropriately rotating it in the J direction.

In this state, the headstock 3.5 is synchronously moved in the directions of arrows A and B (Z-axis direction), and the tool rest 13 is moved as appropriate.
The unmachined portion of the shaft work 29 near the chuck 3b is lathed by appropriately moving the tool 16 in the directions of arrows G and H (X-axis direction).

In this way, when the outer diameter portion of the shaft work 29 has been turned as shown in FIG. 14, the chucks 3b and 5
The rotation of the tool rest 13 in the direction of the arrow C in b is stopped, and the tool rest 13 is retracted from the shaft work 29.
5 is appropriately rotated in the arrow direction or J direction to position the milling tool 16 at a position facing the shaft work 29 as shown in FIG. In that state.

The tool rest 15 is fed along with the milling tool 16 by a predetermined amount in the direction of arrow H, and the headstocks 3 and 5 are
The outer peripheral portion of the shaft work 29 is milled by appropriately moving it synchronously in the directions of arrows A and B (Z-axis direction). At this time, the chucks 3b and 5b can be appropriately rotated synchronously in the directions of arrows C and D by C-axis control to perform the milling process. In addition,
After the milling process is completed, the tool rest 15 is retracted from the shaft work 29.

In this way, when the shaft work 29 has been machined a predetermined length from the tip, the chuck 5b is loosened to release the holding relationship between the chuck 5b and the shaft work 29, and in this state, the headstock 5 is moved in the direction of arrow A. to move it a predetermined distance. Then, the chuck 5b also moves to the shaft work 2.
The machined portions 9 are moved in the direction of arrow A while passing through the work holding portion Sd one after another, and are positioned close to the chuck 3b. In this state, the chuck 5b is tightened to hold the shaft work 29, and the chuck 3b is loosened.In this state, the headstock 5 is moved together with the chuck 5b by a predetermined distance in the direction of arrow B, and the shaft work 29 is When the shaft work 29 has been pulled out from the chuck 3b by a predetermined length, the chuck 3b is tightened to hold the shaft work 29. Therefore, the chucks 3b and 5b are synchronously rotated in the direction of arrow C, and the headstock 3.5 is appropriately moved together with the shaft workpiece 29 in the directions of arrows A and B. The cut-off tool 16 mounted on the stand 13 is placed facing the first
The tool rest 13 shown in FIG. 6 is fed a predetermined distance in the direction of arrow H together with the cut-off tool 16. Then, the shaft work 29 is cut by the tool 16 in the directions of arrows G and H, and the machined part (hereinafter referred to as (referred to as part 29a) is separated from the other unprocessed portion of shaft work 29.

When the shaft work 29 is cut, the tool rest 13
is retracted from the shaft work 29, and the headstock 5
is moved by a predetermined distance in the direction of arrow B together with the chuck 5b as shown in FIG. Then, the part 29a also moves by a predetermined distance in the B direction together with the chuck 5b.

In that state.

The headstock 5 is moved in the directions of arrows A and B (Z-axis direction), and the turret 15 is moved together with the tool 16 in the directions of arrows G and H (
In parallel with this, the headstock 3 is moved in the direction of the arrow A.
, in the B direction (Z-axis direction), and further moves the tool post 13 together with the tool 16 in the arrow G and H directions (X-axis direction) to move the shaft workpiece 29 held by the chuck 3b.
The same processing as shown in FIG. 12 is performed on the unprocessed portion of the part 29a. When the processing on the part 29a is completed, the chuck 5b is loosened and the part 29a is removed from the chuck 5b, and the part 29a is No. 18 @ Discharge toward the parts catcher 19 shown below.

Furthermore, a case will be described in which a workpiece 27 shown in FIG. 19 is processed using the multitasking machine tool 1 without using a bar feeder as shown below. That is, the chuck 3b is moved so that the workpiece 27 protrudes from the chuck 3b mounted on the headstock 3 by a predetermined length in the direction of arrow B.
Next, in that state,
The chuck 3b is rotated together with the workpiece 27 in the direction of arrow C or D, the headstock 3 is appropriately moved in the directions of arrows A and B, and the tool rest 13 is appropriately moved together with the tool 16 in the directions of arrows G and H. First, the workpiece 27 is processed by the tool 16, and the chuck 3b is stopped from rotating, and the workpiece holder 3d is then moved so that the workpiece 27 can move in the directions of arrows A and B (Z-axis direction). 0th order to loosen it a little,
In this state, the headstock 5 is moved along with the chuck 5b toward the headstock 3 by a predetermined distance in the direction of the arrow, and the workpiece 27
The tip of the workpiece is inserted into the workpiece holding section 5d. Once the tip is fitted into the workpiece holding section 5d, the workpiece holding section 5d is tightened to hold the tip.

In this way, when the workpiece 27 is supported between the chucks 3b and Sb, the chucks 3b and 5b are removed.

It is rotated in the direction of arrow C synchronously with the workpiece 27. When the chucks 3b and 5b rotate synchronously in the direction of arrow C, only the headstock 5 is moved in the direction of arrow B without moving the headstock 3 in the directions of arrows A and B (Z-axis direction).
That is, the tool rest 13 is moved in a direction away from the headstock 3, and the tool rest 13 is driven to move in the directions of arrows G and H (X-axis direction) together with the tool 16. Then, the workpiece 27 is gradually moved in the direction of arrow B by being pulled out from the chuck 3b by the headstock 5, and its left and right ends in the figure are pulled out from the chuck 3b.
, 5b, it is continuously machined by the tool 16. At this time, the workpiece 27 is held by the chuck 3b in a slightly loosened state so that it can move in the directions of arrows A and B (Z-axis direction), so the movement of the workpiece 27 in the direction of arrow B is smooth. It is done.

(g) Zero effect of the invention As explained above, according to the invention of the first method of the present invention, the first headstock of the tool rest 13 etc. corresponds to the first headstock (for example, the headstock 3). The first tool rest is provided so as to be relatively movable at least in a direction perpendicular to the spindle axis such as the Z-axis, and the tool rest 15 is provided in correspondence with the second head stock (for example, the main spindle 5).
A second tool rest such as the above is provided so as to be freely movable and driven at least in a direction perpendicular to the spindle axis, and the first and second tool rest such as the first and second tool rest ez axis are connected. The tool holding means such as turret heads L3a and 15a are arranged on the same side with respect to the shaft, and tool holding means such as turret heads L3a and 15a are arranged on the first and second tool rests so as to be freely indexable and rotatable about an axis parallel to the axis of the main shaft, and The first
A tool is provided in the tool holding means of the second tool rest in a form corresponding to each headstock and in a form that can face the respective headstock side, and before cutting off a work such as the bar work 20, the second tool is installed. headstock (for example, headstock 5).

The workpiece is moved relative to the first headstock (for example, headstock 3) by a predetermined distance (including relative movement by the j-th headstock), and the workpiece is moved toward the first and second headstocks. By performing the first step of holding the headstock by the headstock, and in that state, synchronously rotating the first and second headstocks,
The workpiece is cut off and the part 20a is held from the first headstock to the second headstock. Execute the second step,
Further, the second headstock is relatively moved together with the part 20a to a position separated by a predetermined distance from the first headstock (including relative movement by the first headstock).

The third step is executed, and in that state, the first process is performed on the workpiece held on the first headstock.The fourth step is executed, and the workpiece held on the second headstock is processed. A fifth step of processing the second process is performed on the part 20a.

Furthermore, between the first step and the fourth step.

Since the workpiece is configured to be sent out by a predetermined length from the first headstock, after the first step is completed.

While the part 20a including the first processed portion is held by the second headstock 5, it can be separated from other unprocessed portions of the workpiece and held on the second headstock. As a result, parts 20a having a predetermined shape can be manufactured continuously by performing the first and second steps without manual intervention. Furthermore, by arranging the first and second tool rests on the same side with respect to the axis that connects the first and second headstocks, the operation of supplying the workpiece to each headstock and the operation of supplying the workpiece to each tool rest are facilitated. Not only is it possible to set up the tool 16 etc. from the opposite side of the tool post without being obstructed by the tool post, but by arranging the double-edged anastomosis on the same side, it is possible to perform setup work for the tool 16 etc. from the opposite side of the tool post without being obstructed by the tool post. It becomes possible to reduce the thickness in the G and H directions.

Further, the tool holding means are arranged rearward to each other, and the tools are arranged so as to be able to face the respective headstocks. The second tool rest and the second headstock can operate independently from each other. As a result, no matter what condition one headstock and turret are in, various setup operations can be performed on the other headstock regardless of the condition of one headstock and turret. , there is no need to stop the operation of the one headstock, which is extremely convenient.

Furthermore, by arranging the tool holding means from the rear and setting its rotation center parallel to the spindle axis direction (Z-axis direction), the distance between both tool holding means in the Z-axis direction can be adjusted to contribute to the machining operation. It can be minimized without creating wasted space.

Therefore, if the maximum distance in the Z-axis direction between the headstocks is the same, it is possible to secure the maximum machinable area, and it is possible to provide a machining control method for space-saving and high-performance multi-tasking machine tools. becomes.

Further, according to the invention of the second method of the present invention, the first tool rest such as the tool rest 13 corresponding to the first head stock (for example, the head stock 3) is moved at least to the main shaft such as the Z axis. A second tool rest such as a tool rest 15 corresponding to the second headstock (for example, the headstock 5) is provided so as to be movable and driven in a direction perpendicular to the spindle center, and the second tool rest such as the tool rest 15 is arranged at least orthogonally to the main spindle center. the first and second tool rests are arranged on the same side with respect to an axis connecting the first and second headstocks, such as two shafts, and talent head 1 on the second tool rest.
Tool holding means such as 3a and 15a are respectively provided so as to be indexable, rotatable, and movable around an axis parallel to the spindle axis, and are arranged rearward to each other, and the tool holding means of the first and second tool rests are provided respectively. Before cutting off a work such as the 5-bar workpiece 20, tools are installed in the holding means in a form that corresponds to each headstock and in a form that can face each headstock side. 5) on the first headstock (e.g.
The workpiece is moved relatively toward the headstock 3) by a predetermined distance (including relative movement by the first headstock), and is held by the first and second headstocks, and in that state. , the holding relationship between the first headstock and the workpiece is released, and further, in this state, the second headstock is relatively moved to a position a predetermined distance away from the first headstock ( (including relative movement by the first headstock), the workpiece is pulled a predetermined length from the first headstock, and in that state, the workpiece is held by the first and second headstocks; Next, the first and second headstocks.

By rotating synchronously, the workpiece can be cut off and the second
The second headstock is held on the headstock of the part 20.
a to a position a predetermined distance away from the first headstock (including relative movement by the first headstock), and in that state, the workpiece held on the first headstock is Therefore, in addition to the effects of the first invention described above, the second process is performed on the parso held on the second headstock. After the first process is completed, the workpiece can be pulled out from the first headstock by a predetermined length using the second headstock without using a bar feeder, and the workpiece can be cut off in that state. It becomes possible to immediately perform the first process on the workpiece held on the stand.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the main parts of a multi-tasking machine tool to which an embodiment of the machining control method for a multi-tasking machine tool according to the present invention is applied, and FIG. 2 is a diagram showing the main parts of a multi-tasking machine tool to which an embodiment of the present invention is applied. FIG. 3 is a diagram showing the main parts of another multi-tasking machine tool to which an embodiment of the present invention is applied. FIGS. Figures 12 to 18 are diagrams showing how a long shaft workpiece is machined using the multi-tasking machine tool shown in Figure 1. 20 and 20 are diagrams showing the state of bar feeder machining using the multi-tasking machine tool shown in FIG. 1. 1... Multi-tasking machine tool 3... First headstock (headstock) 5...
Second headstock (headstock) 13...First tool rest (turret) 15...Second tool rest (turret>1)
3a, 15a... Tool holding means (turret head) 16... Tool 20... Work (bar work) 20a...
...Parts supplier Yamazaki Mazak Co., Ltd. agent Patent attorney A1) Shinji (and 1 other person) Figure 17 Figure 20 30305d

Claims (2)

[Claims] (1) It has a first headstock and a second headstock which are arranged to face each other and are movable relative to each other in the direction of the spindle axis, and a workpiece is held on the first headstock. After the first step is completed, the part including the part that has undergone the first process is cut off from the workpiece, and the cut off part is transferred to the second headstock and the part is cut off. In a multi-tasking machine tool capable of performing a second step of machining on an object, a first tool rest is moved relative to the first headstock at least in a direction orthogonal to the spindle axis. A second tool rest corresponding to the second headstock is provided so as to be movable relative to the second headstock at least in a direction orthogonal to the spindle axis, and the first and second tool rests are The first and second headstocks are arranged on the same side with respect to the axis connecting the first and second headstocks, and
The tool holding means of the first and second tool rests are respectively provided in such a manner that they can be indexed and rotated freely about an axis parallel to the spindle axis, and are arranged rearward to each other. A tool is provided in a shape corresponding to each headstock and in a shape that can face the respective headstock side, and before cutting off the workpiece, the second headstock is directed toward the first headstock. performing a first step of relatively moving a predetermined distance and holding the workpiece by the first and second headstocks, and in this state, synchronously moving the first and second headstocks; By rotating the part to the first
holding the part from the headstock to the second headstock; further, relatively moving the second headstock together with the part to a position separated from the first headstock by a predetermined distance; The third step is executed, and in this state, the fourth step is executed to process the first process on the workpiece held on the first headstock, and the part held on the second headstock is executed. A fifth step is executed in which a second step of machining is performed on the workpiece, and further, between the first step and the fourth step, the workpiece is sent out by a predetermined length from the first headstock. The constructed machining control method for multi-tasking machine tools. (2) It has a first headstock and a second headstock which are arranged to face each other so as to be movable and driveable relative to each other in the direction of the spindle axis, and a workpiece is placed on the first headstock. After the first process is completed, the part including the part that has been processed in the first process is cut off from the workpiece, and the cut-off part is transferred to the second headstock and the part is cut off from the workpiece. In a multi-tasking machine tool capable of performing a second step of machining a part, a first tool rest corresponding to the first headstock is positioned at least in a direction orthogonal to the spindle axis relative to the first headstock. a second tool rest corresponding to the second headstock is provided so as to be movable and driven at least in a direction perpendicular to the spindle axis, and the first and second tool rests are provided so as to be movable and drivable; are arranged on the same side with respect to the axis connecting the first and second headstocks, and the first and second headstocks are
The tool holding means of the first and second tool rests are respectively provided in such a manner that they can be indexed and rotated freely about an axis parallel to the spindle axis, and are arranged rearward to each other. A tool is provided in a shape corresponding to each headstock and in a shape that can face the respective headstock side, and before cutting off the workpiece, the second headstock is directed toward the first headstock. to move the workpiece a predetermined distance relative to the first and second workpieces.
In this state, the holding relationship between the first headstock and the workpiece is released, and further, in this state, the second headstock is moved a predetermined distance away from the first headstock. relatively moving the workpiece to a position and pulling out the workpiece by a predetermined length from the first headstock;
In this state, the workpiece is held by the first and second headstocks, and then, by rotating the first and second headstocks synchronously, the workpiece is cut off and transferred to the second headstock. Further, the second headstock is relatively moved along with the parts to a position a predetermined distance away from the first headstock, and in this state, the workpiece held on the first headstock is A machining control method in a multi-tasking machine tool, which is configured to perform machining in a first step and also perform machining in a second step on a part held on a second headstock.