JPH0550302A - Bar machining lathe - Google Patents

Abstract

PURPOSE:To feed a bar to a main spindle by not forcing it to pass through the inside of the main spindle. CONSTITUTION:A bar 40 is held in a V channel 23 as it is kept in a length state. A turret 11 is rotated to turn second main spindle 12 toward the V channel 23. The head of the bar 40 is grasped by chuck 12a. The second tool post 10 is moved to pull out bar 40 from the V channel 23. A work 40a is cut from the bar 40 by cutter 30. Machining of first process on the work 40a placed on second main spindle 12 is performed by first tool post 7. The turret 11 is rotated to turn the second main spindle 12 toward first main spindle 6, and delivers the work 40a. Then, back-face machining, that is the second process on the work 40a placed on the first main spindle 6 is performed by first tool post 7 and second tool post 10 that finished cutting of a new work 40a. Thereby a bar whose diameter is large as well as a black scale material, can be machined with the main spindles rotated at a high speed, and the machining time of the bar, can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar material lathe for processing a long bar material while cutting it into a predetermined length.

[0002]

2. Description of the Related Art Conventionally, when processing a long bar material on a lathe, as disclosed in JP-A-63-272405, the bar material is fed from a bar feeder installed behind the main shaft. The bar material is supplied in such a manner that the bar material is fed into the inside of the main shaft and penetrates the inside of the main shaft to project the tip end portion of the bar material into the processing region in front of the main shaft. Then, the bar member is held in a long shape by the main shaft and rotated, and a predetermined process is performed on a portion of the bar member protruding forward of the main shaft.

[0003]

When the long bar material is supplied so as to penetrate the inside of the main shaft as in the prior art, there are various problems as described below. First, it is necessary to use a main shaft, a chuck and a driving mechanism (cylinder, etc.) in which a through hole is formed, and the inner diameter of the through hole limits the outer diameter of the bar material that can be processed. .. Also,
Since the bar material is rotated as it is long, the bar material easily vibrates and the main shaft cannot be rotated at a high speed. Further, in order to prevent the bar material from vibrating, a draw tube, JP-A-64-
It is necessary to attach the filler tube or the like disclosed in 20201 to the main shaft. Further, since the filler tube supports the bar material by sliding with the bar material, it is necessary to replace the filler tube as appropriate according to the outer diameter of the bar material. In addition, as a bar material, it is necessary to use a mill stick,
Black leather cannot be used. Further, since the parting process is performed after the end of the process and the part where the predetermined process is completed is cut from the long bar material, the parting time is extended by the parting time.

In view of the above circumstances, it is an object of the present invention to provide a bar material processing lathe capable of suitably processing a long bar material.

[0005]

According to the present invention, a headstock (5) provided with a first work spindle (6), and a first tool rest (7) and a second tool rest (10). And a bar member holding means (23) for holding the bar member (40) in a long state, and the second tool rest (10) is the headstock (5) or the bar member. The second work spindle (12) and the first work spindle (6) are provided on the second tool rest (10) so as to be movable and driven so as to move toward and away from the holding means (23). Alternatively, the bar material holding means (2
The bar material cutting means (30) is provided between the second tool rest (10) and the bar material holding means (23) in such a manner that it can be selectively opposed to the bar material 3). (4
0) is provided so that it can be cut.

The numbers in parentheses () indicate the corresponding elements in the drawings for the sake of convenience, and the present description is not limited to the description in the drawings. The same applies to the column of "action" below.

[0007]

With the above structure, the second work spindle (1
2) is opposed to the bar material holding means (23) so that the bar material holding means (23) causes the second work spindle (1) to move.
The bar material (40) acts on the front surface of 2) to be supplied in a short cut form.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view showing an outline of an embodiment of a bar material processing lathe according to the present invention, FIG. 2 is a plan view showing details of the bar material processing lathe shown in FIG. 1, and FIG. 4 is a front view of the machine shown in FIG. 4, a side view of the machine shown in FIG. 2, and FIG.
1 is a plan view showing the details of the bar feeding device of the bar processing lathe shown in FIG. 1, FIG. 6 is a front view of the bar feeding device shown in FIG. 5, and FIG. 7 is a projection from the side direction of the bar feeding device shown in FIG. 8 to 13 are plan views showing the operation sequence of the bar material lathe shown in FIG. 1 when processing the bar material.
FIG. 4 is a plan view showing the outline of another embodiment of the bar processing lathe according to the present invention.

The numerically controlled multi-spindle lathe 1 has a machine 2 as shown in FIG. 1. The machine 2 is provided with a bed 3 as shown in FIG. 2, FIG. 3 or FIG. Has been. A headstock 5 is provided on the left side of the bed 3 in FIG. 2 so as to be fixed to the bed 3, and a first work spindle 6 rotates on the headstock 5 about an axis C1. Driven freely. And the front surface of the first work spindle 6 (right end in the figure)
A chuck 6a is attached to the.

On the bed 3, a first turret tool rest 7 is arranged in front of the headstock 5 (lower right in the figure), with respect to the direction of the axis C1 of the first work spindle 6. Are parallel to each other and are movable and driven in directions G and H (Z-axis direction) and in directions I and J (X-axis direction) perpendicular to the direction of the axis C1. That is, the first turret turret 7
Has a carriage 7c, and the carriage 7c is provided so as to be movable in the directions of arrows G and H with respect to the bed 3 via a drive motor 7c '. On the carriage 7c, a transverse carriage 7b is provided so as to be movable and driven in the directions of arrows I and J via a drive motor 7b '. And
A turret 9 formed in a polygonal shape is provided on the horizontal feed table 7b.
It is rotatably provided around an axis T1 parallel to the axis C1 of the first work spindle 6. Then, on the outer peripheral surface of the turret 9, a plurality of tool mounting positions are provided with an axis T
It is formed radially about 1 (in a form that can be indexed by the rotation of the turret 9), and at each tool mounting position,
Various tools 39 such as a turning tool and a rotary tool are mounted. Incidentally, a rotary tool may be mounted on the second turret turret 10 to be described later, and only a turning tool may be mounted on the first turret turret 7, and in this case, the first turret turret 7
Since the rotary drive mechanism for milling disclosed in Japanese Patent Laid-Open No. 1-159153 is not required, the mechanism of the first turret tool post 7 can be simplified.

Further, a second turret tool rest 10 is arranged on the bed 3 in front of the headstock 5 (upper right in the figure), with respect to the direction of the axis C1 of the first work spindle 6. Are parallel to each other, and are movably driven in directions A and B (Z-axis direction) and directions C and D (X-axis direction) perpendicular to the direction of the axis C1. That is, the second turret turret 1
0 has a carriage 10c, and the carriage 10c passes through a drive motor 10c 'to the bed 3 with an arrow A,
It is provided so as to be movable in the B direction. On the carriage 10c, a transverse carriage 10b is provided so as to be movable in the directions of arrows C and D in FIG. 2 via a drive motor 10b 'shown in FIG. A turret 11 formed in a polygonal shape is provided on the traverse table 10b in a direction perpendicular to the axis C1 of the first work spindle 6 and in the moving direction of the second turret tool post 10 (directions C and D). Is provided so as to be rotatable in the directions of arrows E and F about an axis T2 parallel to the center. Then, on the outer peripheral surface of the turret 11, a plurality of tool mounting positions are radially arranged around the axis T2 (turret 1
1) so that it can be indexed by rotating 1)
The chuck 12a of the second work spindle 12 is rotatably provided at a tool mounting position at a certain position, and various tools 39 such as a turning tool and a rotary tool are mounted at other tool mounting positions. ..

That is, in the turret 11, the second work spindle 12 has an axis C perpendicular to the axis T2 of the turret 11.
2 is provided so as to be rotatable around the center of the second work spindle 12, and the second work spindle 12 is rotated by the turret 11 in the directions of arrows E and F to change the axis C2 to the axis C1 of the first work spindle 6.
Alternatively, they are arranged in such a manner that they can be selectively aligned with the axis CB of the bar member 40 when loaded on the V groove 23 described later. The chuck 12a is attached to the front surface of the second work spindle 12.
However, the turret 11 is mounted so as to project from the outer peripheral surface of the turret 11. As a rotation drive mechanism for the second work spindle 12 on the turret 11, a dedicated rotation drive mechanism may be provided on the second turret tool post 10, but it is not disclosed in JP-A-1-159915.
It is also possible to use the rotary drive mechanism for milling disclosed in No. 3, etc.

A bar supply device 20 is provided on the right side of the machine 2 in FIG. The bar supply device 20 has a main body 20a, and as shown in FIG. 5, a material shelf 21 on which a large number of bar members 40 are stacked and stored is fixedly installed in the main body 20a. There are 40 bar materials on the material shelf 21.
A plurality of tilted frames 21a for supporting the main body 20a are tilted to the lower left in FIG.
The partition plate 21b is attached to the lower end of the inclined frame 21a in the figure, and the partition plate 21b is provided on the inclined frame 21a.
It is projected so as to lock the tilt of 0. A guide plate 21c is provided at the left end of the material shelf 21 in FIG.
It is fixed to the main body 20a in such a manner that it can come into contact with the front end surface of the bar member 40 when loaded on the la 1a. And the material shelf 21
5, a guide plate 25b is provided so as to face the guide plate 21c and to come into contact with the rear end surface of the bar member 40 when loaded on the inclined frame 21a. The plate 25b is provided along the rail 25c fixed to the main body 20a so as to be manually movable in the directions of arrows K'and L '. That is, the guide plate 25b is moved to the arrow K ',
By moving in the L'direction, the distance between the guide plates 21c and 25b can be adjusted according to the length of the bar member 40. The guide plate 25b is fixed to and released from the rail 25c via a lever 25d, and a material feeding rod 25 and a drive cylinder (which means a hydraulic pressure or pneumatic cylinder, etc .; hereinafter the same) 25a. It moves integrally in the directions of arrows K'and L '.

In the bar supply device 20, the kicker 22 projects downward from the inclined frame 21a in FIG. 7 through the gap between the inclined frames 21a and 21a to a position higher than the upper end of the partition plate 21b in the figure. It is provided so that it can be driven up and down in the directions of arrows R and S via the drive cylinder 22e. As shown in FIG. 6, a plurality of kickers 22 are fixed to a long connecting member 22a, and the connecting member 22a is provided with two drive cylinders 22e and 22e fixed to the main body 20a. Connect the connecting member 22a with the arrows R and S.
The connecting member 22a is connected to the right side portion and the left side portion in the drawing, respectively, so as to be vertically driven. And
A rack 22b is fixed to a connecting portion of the connecting member 22a with each of the drive cylinders 22e so as to extend in parallel with a moving direction of the connecting member 22a (directions of arrows R and S). Further, a long connecting rod 22d is rotatably provided in the main body 20a in a form of being arranged in parallel to the connecting member 22a. Pinion gears 22c, 22c are provided at both ends of the connecting rod 22d in the drawing. 22c is fixed. And
The pinion gears 22c and 22c of the connecting rod 22d mesh with the racks 22b and 22b of the connecting member 22a. Therefore, the drive cylinders 22e, 22e are the same as the rack 2
2b, the pinion gear 22c, and the connecting rod 22d, the connecting member 22a can be prevented from inclining to the left and right in FIG. 6 when the kicker 22 is driven up and down in the directions of arrows R and S. The kicker 22 can be lifted and lowered while being kept at a uniform height.

The bar feeder 20 includes a material shelf 21 shown in FIG.
On the left side, a long V-shaped groove 23 is provided so as to be separated from the material shelf 21 by a partition plate 21b.
1, the axis CB of the bar member 40 when loaded in the V groove 23 can be aligned with the axis C2 of the second work spindle 12 of the machine 2 as shown in FIG. 1st work spindle 6
Are arranged so as to extend parallel to the direction of the axis C1. Further, the V-groove 23 has a height adjusting handle 23a.
However, according to the outer diameter of the bar member 40 to be loaded in the V-shaped groove 23, the height of the V-shaped groove 23 with respect to the main body 20a in the vertical direction in FIG. That is, by adjusting the height of the V groove 23 in the vertical direction in FIG. 7 via the height adjusting handle 23 a according to the outer diameter of the bar material 40, the shaft of the bar material 40 when loaded in the V groove 23. Heart CB
Can be aligned with the axis C2 of the second work spindle 12. The left and right ends of the V groove 23 in FIG. 5 are formed to be open, and the material feeding rod 25 is fixed to the guide plate 25b on the right side of the V groove 23 in the figure (the side opposite to the main body 2). The drive cylinder 25a is provided so that it can be driven to project and retract in the directions of arrows K and L parallel to the extending direction of the V groove 23.

Then, as shown in FIG. 6, at the left end portion (the end portion on the main unit 2 side) of the V groove 23 of the bar supply device 20 in the figure, the clamp cylinder 27 is mounted on the V groove 23. The material 40 is provided so that it can be clamped. On the left side of the clamp cylinder 27 in FIG. 5 (on the side of the main unit 2), the stopper 26 appropriately blocks the opening portion of the V groove 23 at the left end (the end on the side of the main unit 2) in the drawing. It is provided so as to project and retreat in the directions of arrows M and N via.
Further, a cutter traverse table 29 is provided on the left side (on the side of the main body 2) of the opening of the V groove 23 on the left side (on the side of the main body 2) in the drawing.
It is provided so as to be movable and driven in the directions of arrows P and Q perpendicular to the extending direction of the V groove 23 via the drive motor 29a, and the cutter traverse table 29 has a disk-shaped cutter 30 (saw).
Is rotatably driven via the cutter drive motor 30a.

Since the numerically controlled multi-axis lathe 1 has the above-described structure, when the long bar 40 is processed in the numerically controlled multi-axis lathe 1, a large number of bar members 40 are long. Material shelf 21 of the bar supply device 20 stored as it is
Then, one bar member 40 is taken out and loaded on the V groove 23. That is, when the kicker 22 is raised in the arrow R direction in FIG. 7 via the drive cylinder 22e, one of the plurality of bar members 40 stored in the material shelf 21 is loaded at a position above the kicker 22 in the figure. The bar member 40 of the book is pushed upward in the figure, and is loaded on the V groove 23 over the partition plate 21b. At this time, loading of the bar material 40 in the V groove 23 can be detected by a photoelectric switch or the like mounted in the V groove 23. In addition, one bar material 4 from the material shelf 21
After taking out 0, the kicker 22 is lowered in the direction of arrow S via the drive cylinder 22e until the bar member 40 loaded on the inclined frame 21a of the material shelf 21 is locked by the partition plate 21b. Inclining to the lower left in the figure,
One bar member 40 is loaded at a position above the kicker 22 in the figure.

While the bar material 40 is being taken out of the material shelf 21 as described above, the stopper 26
5 is projected in the direction of the arrow M in FIG. 5 via the drive cylinder 26a to block the opening portion of the V groove 23 at the left end (the end on the main unit 2 side) in the drawing. After the bar material 40 is loaded on the V groove 23 as described above, the material feeding rod 25 on the right side of the V groove 23 in FIG. 5 is projected in the arrow K direction via the drive cylinder 25a. Then, the long bar material 40 loaded in the V groove 23 is pushed at the rear end by the material feeding rod 25 and slides on the V groove 23 to the left in the drawing (the machine 2 side). Then, when the tip of the bar member 40 projects from the opening of the V groove 23 at the left end (the end on the side of the main unit 2) in the drawing and comes into contact with the stopper 26, the bar member 40 is stopped. Therefore, when the bar material 40 is sent from the bar supply device 20 to the main body 2 side, the bar material 40 collides with the second work spindle 12 and the like, and the second work spindle 12
The stopper 26 can prevent the damage of the like. When the bar member 40 protrudes from the V groove 23 and stops contacting with the stopper 26, the clamp cylinder 27 shown in FIG.
After fixing 0 to the V groove 23, the material feeding rod 2
5 is retracted in the direction of arrow L in FIG. 5 via the drive cylinder 25a. Then, the stopper 26 is retracted in the direction of the arrow N via the drive cylinder 26a so that the second work spindle 12 (chuck 12a) on the machine 2 side can face the bar material 40 loaded in the V groove 23. ..

While the above-mentioned operation is being performed on the side of the bar feeding device 20, the second turret tool post 10 on the side of the main body 2 is provided.
The turret 11 of FIG. 8 is appropriately rotated in the directions of arrows E and F in FIG. 8 to index the second work spindle 12 (chuck 12a) to the bar supply device 20 side (right side in the figure), and the second turret and the second turret. The tool rest 10 (transverse feed rest 10b) is appropriately moved and driven in the directions of arrows C and D via the drive motor 10b '. Then, the axis C2 of the second work spindle 12 is set to the V groove 23.
It is aligned with the axis CB of the bar material 40 loaded on the. At this time, the axis C2 of the second work spindle 12 is parallel to the moving direction of the second turret tool post 10 (directions of arrows A and B). Then, as described above, when the tip portion (the left end portion in the drawing) of the bar member 40 projects from the V groove 23 to the machine 2 side, the second turret tool post 10 (reciprocating platform 10c) is passed through the drive motor 10c '. Is driven to move in the direction of arrow B to move the second work spindle 12 (chuck 12a) to the bar feeder 2.
It approaches 0. Then, the tip portion of the bar member 40 protruding from the V groove 23 is attached to the chuck 1 of the second work spindle 12.
2a, then the clamp cylinder 27 shown in FIG.
The groove 23 is slidable. Then, the second turret tool post 10 (reciprocating stage 10c) is connected to the drive motor 10
The second work spindle 12 (chuck 12a) is moved away from the bar supply device 20 by moving it in the direction of arrow A in FIG. Then, the second work spindle 12
Bar material 40 clamped by the chuck 12a of
Is pulled out from the V groove 23 of the bar supply device 20 by a predetermined length in a manner of sliding on the V groove 23 to the left side (the machine 2 side) in the drawing. Then, again, the clamp cylinder 27 shown in FIG. 6 is brought into a clamped state, and the bar member 40 is held and fixed by the chuck 12 a of the second work spindle 12 and the clamp cylinder 27.

Next, the cutter 30 is rotationally driven by the cutter driving motor 30a, and the cutter traverse table 29 is driven by the driving motor 29a in the direction of arrow P in FIG. The bar member 40 held and fixed by the chuck 12a and the clamp cylinder 27 is cut by the cutter 30. At this time, the cutting pattern can be appropriately changed according to the type (material, outer diameter, etc.) of the bar material 40. For example, when the outer diameter of the bar member 40 is larger than the effective depth of cut of the cutter 30, the clamping pressure of the clamp cylinder 27 is switched to a low pressure and the bar member 4 is pressed.
0 makes it possible to rotate with respect to the V groove 23 about the axis CB. Then, by rotating the second work spindle 12 (two-point orientation, three-point orientation, etc.), the orientation of the bar member 40 with respect to the cutter 30 is appropriately changed, and the bar member 40 is divided into a plurality of times by the cutter 30. Disconnect. Alternatively, the second work spindle 12 may be C-axis controlled (or controlled at a constant speed) so that the bar material 40 is rotated at a low speed and the bar material 40 is cut by the cutter 30. Even if the outer diameter of the bar material 40 is small, in order to reduce the cutting time, the second work spindle 12 and the bar material 40
The bar member 40 may be cut by the cutter 30 while rotating.

Then, the second work spindle 12 (chuck 1
Since the work 40a cut out from the long bar member 40 to a predetermined length is held in 2a), the second turret tool post 10 (reciprocating table 10c) is driven by the drive motor 10c '.
9 is driven to move in the direction of arrow A in FIG. 9 to separate the second work spindle 12 (chuck 12a) and the work 40a from the bar supply device 20 and face the tool 39 on the first turret tool post 7. Move to the processing area to obtain. Therefore, in the present invention, the bar material 40 is supplied toward the front surface (chuck 12a side) of the second work spindle 12, and the bar material 40 is supplied in a form penetrating the inside of the spindle as in the conventional case. Since there is no such hole, it is not necessary to form a through hole in the second work spindle 12 or the like, and it is possible to process even a bar member 40 having a large diameter. That is, the second work spindle 12 (chuck 12 a) is connected to the bar member 40 on the V groove 23.
Since the shaft centers C2 and CB can be opposed to each other, the bar member 4 can face the front surface of the second work spindle.
0 can be supplied.

Then, the second work spindle 12 (chuck 1
2a) and the workpiece 40a (the portion cut out from the long bar material 40) are rotationally driven, and the turret 9 of the first turret tool post 7 is appropriately rotationally driven to index a predetermined tool 39, and then The turret tool post 7 (reciprocating table 7c, transverse feed table 7b) is appropriately moved and driven in the directions of arrows G, H, arrows I, J via drive motors 7c ', 7b', and the first of the work 40a is moved. Processing (processing of the right side portion of the work 40a in the drawing) is performed. Since the work 40a is cut into a predetermined length from the long bar member 40 as described above, the bar member 40 is not rotated as long as in the conventional case, so that vibration does not occur. Therefore, the second work spindle 12 can be rotated at high speed during machining. Further, it is not necessary to attach a draw tube, a filler tube, etc. to the second work spindle 12, so that the bar member 4
0 is not limited to a brush stick, but a black leather material can be used. The machining of the work 40a in the first step is performed by the second work spindle 12 holding the work 40a.
The (chuck 12a) is attached to the first work spindle 6 (chuck 6a).
Since it is performed in the same direction as (a) (right side in the drawing), in the first step machining on the second work spindle 12 side and the second step machining on the first work spindle 6 side described later, A common tool 39 mounted on the first turret turret 7 can be used. That is, it is not necessary to separately mount the tools 39 having different blade tips for the first step or the second step on the first turret tool post 7.

The work 40 on the second work spindle 12 side
When the processing of the first step of a is completed, the first turret tool post 7 (reciprocating platform 7c, transverse transport platform 7b) is moved to the drive motor 7c ',
It is moved and driven in the arrow H direction and the arrow J direction in FIG. 10 via 7b ', and is retracted away from the second turret tool post 10.
Then, the turret 11 of the second turret tool post 10 is rotationally driven by 180 ° in the direction of arrow E or F to index the second work spindle 12 (chuck 12a) and the work 40a to the left side (headstock 5 side) in the figure. With the second turret turret 1
0 (transverse carriage 10b) is appropriately moved and driven in the directions of arrows C and D via the drive motor 10b '. Then, the axis C2 of the second work spindle 12 is aligned with the axis C1 of the first work spindle 6. At this time, the axis C2 of the second work spindle 12 is parallel to the moving direction of the second turret tool post 10 (directions of arrows A and B). Next, the second turret turret 1
0 (reciprocating carriage 10c) through the drive motor 10c 'in FIG.
1 Driven in the direction of arrow A to drive the second turret tool post 10
And the headstock 5 are brought close to each other, and the work 4 for which the first process is completed
0a is transferred from the second work spindle 12 (chuck 12a) to the first work spindle 6 (chuck 6a).

Work 40a from the second work spindle 12 (chuck 12a) to the first work spindle 6 (chuck 6a)
12 is completed, the second turret tool post 10 (reciprocating stage 10c) is moved and driven in the direction of arrow B in FIG. Then, while rotating the first work spindle 6 (chuck 6a) and the work 40a,
After the turret 9 of the first turret turret 7 is appropriately rotationally driven to index a predetermined tool 39, the first turret turret 7
The (reciprocating table 7c, the horizontal transfer table 7b) is appropriately moved and driven in the arrow G and H directions and the arrow I and J directions to process the workpiece 40a in the second step (back surface processing of the right side portion of the workpiece 40a in the drawing). I do.

The work 40a on the first work spindle 6 side
While the second step is being performed, the turret 11 of the second turret tool post 10 is moved 180 ° in the direction of arrow E or F.
Rotate to drive the second work spindle 12 (chuck 12a)
Is indexed to the right side (bar supply device 20 side) in the figure, and the second turret tool post 10 (transverse feed table 10b) is driven by the drive motor 1
The shaft center C2 of the second work spindle 12 is aligned with the shaft center CB of the bar member 40 loaded in the V groove 23 by appropriately moving and driving in the directions of arrows C and D via 0b '. Then, in the same manner as described above, the second turret tool post 10 (reciprocating platform 10c) is driven to move in the direction of arrow B, and the tip end portion of the bar member 40 protruding from the V groove 23 is moved to the second work spindle 12. Chuck 1
Second turret tool post 1 after being clamped by 2a
The bar member 40 is pulled out from the V groove 23 by a predetermined length by moving 0 (reciprocating table 10c) in the direction of arrow A by a predetermined distance. Then, by the cutter 30, the second work spindle 12
The bar member 40 held and fixed by the chuck 12a and the clamp cylinder 27 is cut, and a new work 40a is cut out from the long bar member 40. That is, while the second step of the work 40a is being performed on the first work spindle 6 side, a new work 40a to be processed next is supplied to the second work spindle 12 side. When the work 40a is successively cut out from one bar material 40, the bar material 40 loaded in the V groove 23 becomes gradually shorter, but the bar material 40 from the V groove 23 to the second work spindle 12 is cut. Supplying the bar material 40 to V by the second work spindle 12 (chuck 12a)
Since the bar member 40 is pulled out from the groove 23, it is suitable even if the bar member 40 is shortened.

When the cutting of the new work 40a on the second work spindle 12 side is completed, the second turret tool post 10 is provided.
The (reciprocating table 10c) is driven to move in the direction of arrow A to approach the headstock 5, and the turret 11 of the second turret tool post 10 is driven.
13 is rotationally driven in the directions indicated by arrows E and F in FIG. 13 to index a predetermined tool 39 to the left side (headstock 5 side) in the figure. Then, a new work 4 is attached to the second work spindle 12 (chuck 12a).
0a is held, the second turret tool post 10 (reciprocating stage 10c, transverse feed stage 10b) is appropriately moved and driven in the directions of arrows A, B, arrows C, D to move the first work spindle 6 (chuck). 6a) assists the processing of the second step of the workpiece 40a. That is, the second process of the work 40a on the first work spindle 6 side is performed using only the first turret tool post 7 while the new work 40a is being cut out from the bar material 40. When the cutting of the new work 40a from the bar 40 is completed, the first turret tool post 7 and the second turret tool post 10 are used. Therefore, the processing time of the work 40a (bar material 40) can be shortened.

When the second step machining of the work 40a on the side of the first work spindle 6 is completed, a new work 40a has already been supplied to the side of the second work spindle 12, so immediately the second work spindle is processed. The processing of the first process of the new work 40a on the 12th side can be started.
That is, since a new work 40a can be cut out from the bar material 40 while the second step of the work 40a is being processed on the side of the first work spindle 6, it is necessary to cut off the conventional bar material. The processing time can be shortened by the amount of time. The work 40a, which has been processed in the second process on the first work spindle 6 side, is unloaded by a work unloading unit such as a parts catcher.

In the above embodiment, the V groove 23 of the bar supply device 20 is arranged so as to extend parallel to the direction of the axis C1 of the first work spindle 6. The V groove 23 is a bar member 4 when loaded in the V groove 23.
Any axis may be arranged as long as the axis CB of 0 can be aligned with the axis C2 of the second work spindle 12 in a state parallel to the moving direction of the second turret tool post 10.
For example, in the numerically controlled multi-spindle lathe 1 ′ shown in FIG. 14, the turret 11 ′ on the second turret tool post 10 on the machine 2 side is perpendicular to the axis C1 of the first work spindle 6 and at the first position. The two-turret tool rest 10 is rotatably driven in the directions of arrows E'and F'with a center T2 '(perpendicular to the paper surface) perpendicular to the moving direction (directions of arrows C and D). .. The turret 11 'has a second work spindle 1
2 is rotatably driven in a form in which the axis C2 is arranged perpendicular to the axis T2 'of the turret 11'.
The bar supply device 20 is provided in the form of being arranged above the main unit 2 in the drawing, and the V groove 2 of the bar supply device 20 is provided.
3 is the moving direction of the second turret tool post 10 (arrows C, D
Direction) and extends perpendicularly to the direction of the axis C1 of the first work spindle 6. still,
Among the components of the numerically controlled multi-axis lathe 1 ', the same components as those of the numerically controlled multi-axis lathe 1 shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.

In the numerically controlled multi-spindle lathe 1 ', when pulling out the bar material 40 from the V groove 23 of the bar feeder 20, the turret 11' is rotationally driven in the directions of arrows E'and F '. With the second work spindle 12 (chuck 12a) indexed upward in the drawing, the second turret tool post 10
Is moved in the directions of arrows C and D to drive the bar feeding device 20.
To approach and separate from. Further, in the numerically controlled multi-axis lathe 1 ', when the work 40a is processed in the first step, the turret 11' is rotationally driven in the directions of arrows E'and F'to move the second work spindle 12 (chuck). 12a) and the workpiece 40a are indexed to the right in the figure, and the first turret tool post 7 is moved and driven in the arrow G and H directions and the arrow I and J directions. In the numerically controlled multi-axis lathe 1 ', when the work 40a is transferred from the second work spindle 12 (chuck 12a) to the first work spindle 6 (chuck 6a), the turret 11' is moved to the arrows E ', F. In the state where the second work spindle 12 (chuck 12a) is indexed to the left in the drawing by rotationally driving in the ‘direction, the second turret tool post 10 is driven to move in the directions of arrows A and B, and the spindle head 5 To approach and separate from.

Although the headstock 5 is fixed to the bed 3 in the above-described embodiment, the headstock 5 can be freely moved and driven in the Z-axis direction (left or right direction in FIG. 1 or FIG. 14). It may be provided. Also, in the above embodiment,
The cutter 30 is separated from the tool rest (that is, the cutter traverse table 2
9), the cutter may be attached to the tool post (for example, the first turret tool post 7). Further, in the above-described embodiment, after the tip portion of the bar member 40 is clamped on the chuck 12a of the second work spindle 12, the bar member 40 is moved from the V groove 23 by moving the second turret tool post 10. The case of pulling out to the machine 2 side was described, but in the bar feeding device 20 itself,
A means for feeding the bar material 40 to the main body 2 side may be provided.

Further, in the above embodiment, the case where the round bar is used as the bar material 40 processed in the numerically controlled multi-spindle lathes 1 and 1'is described.
A square rod (hexagonal rod, octagonal rod, etc.) can also be used as the rod. Further, in the above-described embodiment, in order to align the axis CB of the various bar members 40 with the axis C2 of the second work spindle 6, the V of the bar supply device 20 is changed according to the outer diameter of the bar member 40. The case where the height of the groove 23 is configured to be manually adjustable has been described, but the height of the V groove 23 is configured to be automatically adjustable (via a hydraulic or pneumatic cylinder or the like). You may. Also, the type of bar material 40 (outer diameter,
Depending on the round bar, hexagonal bar, etc., the jaws of the chucks 6a, 12a of the work spindles 6, 12 are automatically (for example, Japanese Patent Publication No.
2-18282 (via the automatic chuck jaw changer disclosed in 2-18282).

[0032]

As described above, according to the present invention, a headstock such as a headstock 5 provided with a first work spindle such as the first work spindle 6 and the first turret tool post 7 are provided.
Etc. and a second tool rest such as the second turret tool rest 10 and the like, and bar material holding means such as the V groove 23 is provided in a form that holds the bar material 40 in a long state, The second tool rest is provided so as to be movable and drivable in a manner of moving toward and away from the headstock or the bar member holding means, and the second tool rest is provided with a second work spindle 12, etc. The work spindle,
A bar material cutting means such as a cutter 30 is provided in a freely indexable manner so as to selectively oppose the first work spindle or the bar material holding means, and the second tool rest and the bar material holding means are provided. Since the bar material 40 is provided so as to be cut between the second work spindles, the second work spindle is opposed to the bar material holding means and the second tool rest is moved to move the second tool spindle.
The bar material 40 can be pulled out from the bar material holding means via the work spindle. Therefore, since the bar material 40 can be supplied from the bar material holding means toward the front surface (chuck side) of the second work spindle without penetrating the inside of the second work spindle, a through hole is formed. An unworked work spindle can be used, and a bar material 40 having a large diameter can also be processed. Further, by causing the second work spindle to face the bar material holding means, the long bar material 40 held by the second work spindle and the bar material holding means is moved to a predetermined position via the bar material cutting means. Can be cut to length. Therefore, since the bar material 40 can be supplied to the second work spindle from the bar material holding means in a short cut form, the work spindle can be rotated at high speed during processing, and a draw tube, a filler tube, etc. are not required. As the bar material 40, it is possible to process a black leather material in addition to the stick bar. Further, the second work spindle is opposed to the first work spindle, and the second tool rest is moved to move the second work spindle to the first work spindle.
The work 40a (a portion cut out from the bar material 40 to a predetermined length) can be delivered. Therefore, when the machining of the first step of the work 40a on the second work spindle side is completed, the work 40a is transferred from the second work spindle to the first work spindle, and the work 40a is passed on the first work spindle side. The second process (back surface processing) can be performed. Then, during the processing of the second step, the bar material 4 held by the bar material holding means via the second work spindle.
A new work piece 40a can be cut out from 0, and both the first tool post and the second tool post can be used in the processing of the second step, so the processing time of the bar material 40 can be shortened. You can do it.

[Brief description of drawings]

FIG. 1 is a plan view showing the outline of an embodiment of a bar processing lathe according to the present invention.

FIG. 2 is a plan view showing details of the main body of the bar processing lathe shown in FIG.

FIG. 3 is a front view of the machine shown in FIG.

FIG. 4 is a side view of the machine shown in FIG.

5 is a plan view showing details of a bar supply device of the bar material processing lathe shown in FIG. 1. FIG.

6 is a front view of the bar supply device shown in FIG.

7 is a cross-sectional view of the bar supply device shown in FIG. 6 projected from the side surface direction.

FIG. 8 is a plan view showing an operation sequence (first) of the bar material processing lathe shown in FIG. 1 when processing a bar material.

9 is a plan view showing an operation sequence (second) of the bar material processing lathe shown in FIG. 1 when processing a bar material.

10 is a plan view showing an operation sequence (third) of the bar material processing lathe shown in FIG. 1 when processing a bar material.

FIG. 11 is a plan view showing an operation sequence (fourth) of the bar material processing lathe shown in FIG. 1 when processing a bar material.

FIG. 12 is a plan view showing an operation sequence (fifth) of the bar material processing lathe shown in FIG. 1 when processing a bar material.

FIG. 13 is a plan view showing an operation sequence (sixth) of the bar material lathe shown in FIG. 1 when processing a bar material.

FIG. 14 is a plan view showing the outline of another embodiment of the bar material lathe according to the present invention.

[Explanation of symbols]

 1, 1 '... Bar material processing lathe (numerically controlled multi-axis lathe) 5 ... Spindle stock 6 ... 1st work spindle (1st work spindle) 7 ... 1st turret (1st turret turret) ) 10 ... Second turret (second turret turret) 12 ... Second work spindle (second work spindle) 23 ... Bar material holding means (V groove) 30 ... Bar material cutting means (cutter) ) 40 …… Bar material

Claims (1)

[Claims] 1. A headstock provided with a first work spindle, a first tool rest and a second tool rest, and a bar member holding means for holding a bar member in a long state. The second tool rest is provided so as to be movable and driveable in the form of moving toward and away from the headstock or the bar member holding means, and the second work spindle is provided on the second tool rest. A bar material cutting means is provided so as to be able to selectively oppose the first work spindle or the bar material holding means, and bar material cutting means is provided between the second tool rest and the bar material holding means. A bar material processing lathe that is configured by cutting the material.