JP3162120B2 - Bar processing lathe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, when a long bar material is machined on a lathe, the bar material is fed from a bar feeder installed behind the main shaft as disclosed in Japanese Patent Application Laid-Open No. 63-272405. The bar material is supplied in such a manner that the bar material is fed through the inside of the main shaft, penetrates the inside of the main shaft, and projects the tip of the bar material by a predetermined amount into a processing area in front of the main shaft. Then, the bar material is held by the main shaft while being long and rotated, and a predetermined process is performed on a portion of the bar material protruding forward of the main shaft,
Thereafter, parting-off processing is performed to cut a portion of the long bar material that has undergone predetermined processing.

[0003]

When a long bar material is supplied so as to penetrate through the inside of the main shaft as in the prior art, there are the following various problems. First, it is necessary to use a spindle, a chuck, and a driving mechanism (cylinder, etc.) having a through hole formed therein, and further, the outer diameter of the bar material that can be processed is limited by the inner diameter of the through hole. . Also,
Since the bar is rotated while it is long, the bar is likely to vibrate and the main shaft cannot be rotated at high speed. Further, in order to prevent the bar from vibrating, a draw tube is used.
It is necessary to attach the filler tube disclosed in No. 20201 to the main shaft. Further, since the filler tube supports the bar material in a form that slides with the bar material, it is necessary to appropriately replace the filler tube according to the outer diameter of the bar material. Must be used, and black scale material cannot be used. Further, after the processing is completed, the part after the predetermined processing is cut from the long bar material by performing the parting-off processing, so that the processing time becomes longer by the time of the parting-off processing.

[0004] In view of the above circumstances, an object of the present invention is to provide a bar processing lathe which can suitably process a long bar material.

[0005]

According to the present invention, there is provided a machine body (3), wherein the machine body (3) has a first work holding means (6a).
A first headstock (5) provided with a first spindle (6) provided with a rotatable drive, and a second spindle (16) provided with a second work holding means (16a). A second headstock (15) rotatably provided , and
Processing can be performed on the work mounted on the shaft
A tool post is provided, and a bar material holding means (23) is provided in such a form that the bar material can be movably held in the direction of the first headstock (5) while the bar material is long, and the first headstock (5) is provided. ) To the first
The first work holding means (6a) of the main shaft of the second main shaft (16) can be selectively opposed to the second work holding means (16a) of the second main shaft (16) or the bar material holding means (23). , Provided rotatably with respect to the body (3),
The headstock (15) is provided so as to be relatively movable so as to move toward and away from the first headstock (5), and the bar material held on the bar material holding means (23). Bar material supply means (17, 20) for supplying a predetermined length to the first work holding means (6a) of the first headstock (5) facing the bar material holding means. A first headstock (5) on the bar holding means (23);
A bar material cutting means capable of cutting the bar material (40) whose tip is held by the work holding means (6a) is provided.
Bar material on the bar material holding means by the bar material cutting means
From the first work holding means.
A state where the workpiece in the standing state faces the second headstock
Until the first headstock is swiveled.
Moving drive means, the tool rest and the first headstock,
In a state where the first main shaft faces the second main shaft,
The work held by the first work holding means is cooperated.
The tool rest is arranged so as to be able to perform
And a second headstock, a work held by the second spindle
Are arranged so that they can execute machining operations in cooperation with
It is constructed.

The numbers in parentheses indicate the corresponding elements in the drawings for the sake of convenience, and therefore, the present description is not limited to the description on the drawings. The same applies to the following “action” column.

[0007]

According to the above construction, the bar holding means (23) is provided.
The bar material (40) is sent out of the bar material holding means (23) toward the first main shaft (6) facing the second main shaft (16), and the first main shaft (40) is facing the second main shaft (16). The work (40a) cut from the bar material (40) is transferred from 6) to the second main shaft (16).

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view schematically showing an embodiment of a bar processing lathe according to the present invention, FIG. 2 is a plan view showing details of the machine of the bar processing lathe shown in FIG. 1, and FIG. , FIG. 4 is a side view of the machine shown in FIG. 2, and FIG.
FIG. 6 is a sectional view of the first headstock of the machine shown in FIG. 3 projected from the front direction, FIG. 6 is a sectional view of the first headstock shown in FIG. 5 projected from the side, and FIG. FIG. 8 is a front view of the bar feeding device shown in FIG. 7, FIG. 9 is a side view of the bar feeding device shown in FIG. 7, and FIG. It is a top view which shows the outline of another Example of the bar processing lathe based on this.

The opposed spindle lathe 1 according to the present invention has a machine 2 as shown in FIG. 1, and a bed 3 as shown in FIG. 2, FIG. 3 or FIG. Is provided.
In the right part of FIG. 2 of the bed 3, the first headstock 5 is centered on an axis CR perpendicular to a moving direction (arrows E and F directions) of a second headstock 15 described later with respect to the bed 3. And is provided so as to be rotatable by 180 ° in the directions of arrows A and B.

[0010] That is, as shown in FIG.
A drive cylinder (referred to as a hydraulic or pneumatic cylinder or the like; the same applies hereinafter) 9 is fixed, and a piston rod 9a is attached to the drive cylinder 9 with respect to a direction of an axis CR of a headstock support shaft 7 described later. It is provided so as to be movable in the directions of vertical arrows A 'and B'. A rack 9b is fixed to the piston rod 9a. A drive cylinder 10 is fixed to the bed 3, and a headstock support shaft 7 is attached to the drive cylinder 10 with an arrow A around the axis CR.
It is provided so as to be rotatable in the direction B and to be vertically movable in directions indicated by arrows C and D parallel to the direction of the axis CR.
A pinion gear 7a is provided around the headstock support shaft 7, and the rack 9b of the piston rod 9a meshes with the pinion gear 7a.

Therefore, the headstock support shaft 7 is provided so as to be rotatable in the directions indicated by arrows A and B via the drive cylinder 9 and to be vertically movable in the directions indicated by arrows C and D via the drive cylinder 10. I have. The bed 3 has a sensor 11
b, 11c are fixed so as to be able to detect the rotational position of the headstock support shaft 7 in the directions of arrows A and B. As shown in FIG. Are fixed in such a manner that the ascending / descending position in the directions of arrows C and D can be detected.

The headstock support shaft 7 projects upward from the bed 3 in FIG. 5, and the first headstock 5 is fixed to the upper end of the headstock support shaft 7 in the drawing. And bed 3
The upper surface in the figure and the lower surface in the figure of the first headstock 5 are respectively
The clamp members 3a and 5a are disposed around the headstock support shaft 7, and are disengaged by the vertical movement of the first headstock 5 (headstock support shaft 7) with respect to the bed 3 in the directions of arrows C and D. As described above.

As shown in FIG. 2, the first headstock 5 includes a first spindle 6 which is driven to rotate about an axis C1 perpendicular to the direction of the axis CR of the first headstock 5. It is provided freely. And, the first spindle 6 is indicated by an arrow A of the first headstock 5,
By the rotation in the direction B, the axis C1 is moved to the axis C2 of the second main shaft 16 described later or the V-groove 2 of the bar feeder 20 described later.
3 are arranged so as to be selectively aligned with the axis CB of the bar material 40 loaded on the upper surface 3. A chuck 6a is mounted on the front surface of the first spindle 6.

On the bed 3 near the first headstock 5, as shown in FIG. 1, a stopper 17 is provided at the left end of the V-groove 23 of the bar feeder 20 described later (on the side of the machine 2). In such a manner as to appropriately shield between the opening of the first main shaft 16 and the first main shaft 16, it is provided so as to be able to protrude and retract in the directions of arrows V and W via a drive cylinder 17a.

On the left side of FIG. 2 of the bed 3, a second headstock 15 is parallel to a direction of an axis C 2 of a second spindle 16, which will be described later, so as to approach and separate from the first headstock 5. The bed 3 is provided so as to be movable with respect to the bed 3 in directions indicated by arrows E and F (Z-axis direction). And, on the second headstock 15,
The second main shaft 16 is provided so as to be rotatable about an axis C2, and the second main shaft 16 can align the axis C2 with the axis C1 of the first main shaft 6 described above. Are located. A chuck 16a is mounted on the front surface (the right end in the figure) of the second spindle 16. In addition, the second headstock 15
Is configured to be movable in the directions of arrows E and F so as to approach and separate from the first headstock 5 in order to transfer the work 40a between the first spindle 6 and the second spindle 16 as described later. If the first headstock 5 and the second headstock 15 are provided so as to be relatively movable and driven in the Z-axis direction so as to approach and separate from each other, the first headstock 5 or the second headstock 15 can be provided. Any configuration may be used. That is, both the first headstock 5 and the second headstock 15 may be configured to be movable and driven in the Z-axis direction, or only the first headstock 5 is configured to be movable and driven in the Z-axis direction. Is also good.

In the vicinity of the second headstock 15, FIG.
As shown in FIG.
0a (a portion cut to a predetermined length from the bar material 40 as described later) is provided so as to be able to be carried out of the opposing spindle lathe 1, and the second headstock 15 and the carry-out conveyor 3 are provided.
An unloader 32 such as a handling robot disclosed in JP-A-59-107837 receives a processed work 40a from the second spindle 16 (chuck 16a) and places it on the carry-out conveyor 33 in the vicinity of the conveyor 3. It is provided in a form to gain. The unloader 32 may have any configuration as long as it can transfer the work 40a from the second spindle 16 to the unloading conveyor 33.
The present invention is not limited to the handling robot disclosed in No. 37. In addition, as a means for unloading the processed workpiece 40a, a parts catcher or the like may be employed instead of the unloader 32 and the unloading conveyor 33.

On the bed 3 between the second headstock 15 and the first headstock 5, as shown in FIG.
An arrow G parallel to the direction of the axis C2 of the second spindle 16;
H direction (Z axis direction) and the axis C2 of the second main shaft 16
Are provided so as to be movable and movable in the directions of arrows I and J (X-axis direction) perpendicular to the direction of. That is, the turret tool post 1
3 has a carriage 13c, and the carriage 13c is connected to the bed 3 via a drive motor 13c 'by arrows G,
It is provided so as to be movable in the H direction. Then, on the carriage 13c, a traverse table 13b is provided in the directions of arrows I and J in FIG. 2 via a drive motor 13b 'shown in FIG. A turret 13a is rotatably indexed on the traverse table 13b.

On the right side of the machine 2 in FIG. 1 (on the side of the first headstock 5), a bar supply device 20 is provided. The bar supply device 20 has a main body 20a as shown in FIG.
A material shelf 21 in which a large number of bar members 40 are stacked and stored in a long length is fixedly provided on the main body 20a. The material shelf 21 has a plurality of inclined frames 21a that carry the bar material 40.
9 are fixed to the main body 20a at predetermined intervals in the left-right direction in the figure and are inclined downward and to the left in FIG.
The partition plate 21b is provided at the lower left end in the drawing of FIG.
The bar 40 protrudes from the bar 1a so as to lock the tilt of the bar 40.

In the bar supply device 20, a kicker 22 extends below the inclined frame 21a in FIG. 9 through the gap between the inclined frames 21a, 21a, and projects to a position higher than the upper end of the partition plate 21b in the figure. In such a manner, it is provided so as to be vertically movable in the directions of arrows R and S via a drive cylinder 22e. As shown in FIG. 8, a plurality of kickers 22 are fixed to a long connecting member 22a, and two driving cylinders 22e, 22e fixed to the main body 20a are attached to the connecting member 22a. Arrows R, S
The connecting member 22a is connected to the right and left portions of the connecting member 22a in the drawing so as to be vertically driven. And
A rack 22b is fixed to the connecting portion of the connecting member 22a with each drive cylinder 22e in a manner extending in parallel with the moving direction (the direction of the arrows R and S) of the connecting member 22a. In addition, in the body 20a, near the connecting member 22a,
A long connecting rod 22d is rotatably provided, and pinion gears 22c, 2c, 2d are provided at both ends of the connecting rod 22d in the drawing.
2c is fixed. The pinion gears 22c, 22c of the connecting rod 22d mesh with the racks 22b, 22b of the connecting member 22a. Therefore, the drive cylinders 22e, 22e are connected to the rack 22b, the pinion gear 2
2c and the connection rod 22d, so that the kicker 22
Is driven up and down in the directions of arrows R and S, the connecting member 22a
8 can be prevented from tilting left and right in FIG. 8, and the plurality of kickers 22 can be driven up and down while maintaining a uniform height.

In the bar material supply device 20, a V-groove 23 is formed on the left side of the material shelf 21 in FIG.
It is provided in a form separated from 1. As shown in FIG. 1, the V-groove 23 is such that the axis CB of the bar member 40 when stacked on the V-groove 23 is inverted by 180 ° in the direction of arrow B of the first headstock 5 of the machine 2. The second main shaft 16 is arranged so as to extend in parallel with the direction of the axis C2 of the second main shaft 16 so as to be aligned with the axis C1 of the first main shaft 6. The left end of the V-groove 23 in FIG. 1 (the end on the side of the machine 2) is formed in an open shape so that the bar material 40 can pass through. V-groove 23
The height adjustment handle 23a shown in FIG.
According to the outer diameter of 0, the V-groove 23 is connected to the main body 20a in such a manner that the height in the vertical direction in FIG. 9 can be manually adjusted. That is, by adjusting the height of the V-groove 23 in the vertical direction in FIG. 9 via the height adjustment handle 23a in accordance with the outer diameter of the bar material 40, the bar material 40 loaded on the V-groove 23 is adjusted. Can be matched with the height of the axis C1 of the first spindle 6 when the first headstock 5 of the machine 2 is turned 180 ° in the direction of arrow B in FIG.

The bar feeder 20 is provided with a bar feeder arm 25 for holding the bar 4 when it is loaded on the V-groove 23.
0 is movable in a direction K and L in FIG. 8 parallel to the extension direction of the V-groove 23 so as to be able to push the O over a wide range. That is, as shown in FIG.
A sprocket 26a is rotatably provided at a left end in the drawing, and a sprocket 26b is rotatably provided at a right end in the drawing of the main body 20a via a drive motor 26c. And the sprockets 26a, 26b
As shown in FIG. 8, a chain 26 formed in an endless shape is stretched in such a manner as to be pivotable and parallel to the extending direction of the V-groove 23. As shown in FIG. 7, a rail 25b is fixed to the main body 20a in parallel with the extending direction of the V-shaped groove 23. A bar material feed arm 25 is provided on the rail 25b so as to be slidable in the directions of arrows K and L parallel to the direction in which the V groove 23 extends. It is connected to a chain 26. Then, as shown in FIG. 9, the bar material feeding arm 25 has a chain 26 so that the front end 25 a can contact the rear end surface of the bar material 40 loaded on the V-groove 23.
Is formed in an L-shape so as to extend from above to above the V-groove 23.

A clamp cylinder 27 is provided at the left end of the V groove 23 of the bar supply device 20 in FIG. 1 so as to be able to clamp the bar material 40 loaded on the V groove 23. The left side of the opening of the V-groove 23 in FIG.
Side), a carriage 29b is provided via a drive motor 29c so as to be movable and movable in the directions of arrows M and N parallel to the extending direction of the V-groove 23, and on the carriage 29b, The cutter traverse table 29 is driven by a drive motor 29a.
It is provided so as to be movable and movable in the directions of arrows P and Q perpendicular to the direction in which the V-groove 23 extends. And cutter horizontal feeder 2
9, a disk-shaped cutter 30 (saw) is rotatably provided via a cutter driving motor 30a.

Since the opposing main spindle lathe 1 has the above-described configuration, when the opposing main spindle lathe 1 processes a long bar member 40, a large number of the bar members 40 are stored in a long state. From the material shelf 21 of the bar supply device 20
The bar material 40 is taken out and loaded on the V-groove 23.
That is, first, the bar feed arm 25 is moved in the direction of the arrow L to the retracted position indicated by the two-dot chain line on the right side in FIG. 7 via the drive motor 26c and the chain 26. Next, when the kicker 22 is raised in the direction of arrow R in FIG. 9 via the drive cylinder 22e, one of the plurality of bar members 40 stored in the material shelf 21 which is stacked above the kicker 22 in the drawing is shown. Is pushed upward in the drawing, and is stacked on the V-groove 23 beyond the partition plate 21b. At this time, the bar material 40 is V
Loading on the groove 23 can be detected by a photoelectric switch or the like mounted on the V groove 23. After the bar material 40 is taken out from the material shelf 21 and the kicker 22 is lowered in the direction of arrow S via the drive cylinder 22e, the bar material 40 loaded on the inclined frame 21a of the material shelf 21 is partitioned. The bar member 40 is tilted to the lower left in the figure until it is locked by the plate 21b, and one bar member 40 is stacked above the kicker 22 in the figure.

Then, the stopper 17 is made to protrude in the direction of the arrow V in FIG.
And the opening of the V-groove 23 at the left end in the figure (on the side of the machine 2). Next, the bar material feed arm 25 is moved and driven in the direction of arrow K in FIG. 7 via the drive motor 26c and the chain 26. Then, one long bar material 40 loaded on the V-groove 23 is pushed by the bar-material feed arm 25 at the rear end, and slides on the V-groove 23 toward the machine 2 side. The bar material 40
1 stops when the tip end of the V-groove 23 projects from the opening at the left end of FIG. 1 of the V-groove 23 and contacts the stopper 17 on the machine 2 side. Therefore, the bar material 4 is transferred from the bar supply device 20 to the machine 2 side.
The stopper 17 can prevent the bar member 40 from colliding with the first main shaft 6 or the like and damaging the first main shaft 6 or the like when sending 0.

The first headstock 5 of the machine 2 is shown in FIG.
The first spindle 6 (chuck 6 a) is turned 180 ° in the direction of arrow B from the processing position indicated by the dashed line to the workpiece receiving position indicated by the solid line, and the first spindle 6 (chuck 6 a) is directed toward the bar supply device 20.
Is aligned with the axis CB of the bar material 40 loaded on the V-groove 23. When rotating the first headstock 5,
First, the headstock support shaft 7 and the first headstock 5 are raised in the direction of arrow C with respect to the bed 3 via the drive cylinder 10 shown in FIG. The bed support shaft 7 and the first headstock 5 are the bed 3
To be rotatable. In addition, the clamp member 5
Whether the sensors a and 3a are in the clamped state or the unclamped state can be detected by the sensor 11a. Next, FIG.
The piston rod 9a is retracted in the direction of arrow B 'through the drive cylinder 9 shown in FIG.
The headstock support shaft 7 and the first headstock 5 are rotated by 180 ° in the direction of arrow B with respect to the bed 3 via a. The rotation positions of the first headstock 5 and the headstock support shaft 7 (the first headstock 6
Is the processing position where the chuck 6a is directed to the second spindle 16 side,
The work receiving position where the chuck 6a of the first spindle 6 faces the bar material supply device 20 side) can be detected by the sensors 11b and 11c. When the first headstock 5 is inverted in the direction of arrow B, the headstock support shaft 7 and the first headstock 5 are lowered in the direction of arrow D via the drive cylinder 10, and the clamp members 5a and 3a are clamped. Then, the first headstock 5 is fixed to the bed 3.

Next, the stopper 17 is retracted in the direction of the arrow W in FIG. 1 via the drive cylinder 17a so that the first main shaft 6 (chuck 6a) faces the bar member 40 loaded on the V-groove 23, and Bar material 4 from material supply device 20 to first spindle 6
0 is set to a supplyable state. And the drive motor 26
c, the bar material feed arm 25 is moved by a predetermined distance in the direction of arrow K via the chain 26, and the bar material 40 is
A predetermined amount is sent out from the groove 23 to the first spindle 6 side, and the tip end (the left end in FIG. 1) of the bar member 40 is attached to the chuck 6 of the first spindle 6.
Insert into a. Then, the tip of the bar member 40 protruding from the V groove 23 is clamped by the chuck 6 a of the first main shaft 6, and the bar member 40 is fixed on the V groove 23 via the clamp cylinder 27, and the bar member 40 is The first spindle 6 is held by the chuck 6a and the clamp cylinder 27 (V groove 23).

Then, the carriage 2 is driven by the drive motor 29c.
9b is appropriately moved and driven in the directions of arrows M and N in FIG. 7 to position the cutter 30 at a predetermined position where the bar material 40 is to be cut. Next, the cutter 3 is driven via the cutter drive motor 30a.
0, the cutter horizontal feed table 29 is moved in the direction of the arrow P via the drive motor 29a, and the first spindle 6 is rotated.
The bar material 40 held by the chuck 6a and the clamp cylinder 27 is cut. 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 cutting amount of the cutter 30, the clamping pressure of the clamp cylinder 27 shown in FIG. To make it rotatable with respect to the V-groove 23. Then, the first spindle 6 is rotated (two-point orientation, three-point orientation, etc.), and the cutter 3 is rotated.
The bar member 40 is cut by the cutter 40 in a form divided into a plurality of times by appropriately changing the direction of the bar member 40 with respect to 0. Further, the bar member 40 may be cut by the cutter 30 while rotating the bar member 40 at a low speed by controlling the first spindle 6 to the C-axis (or controlling the rotation speed at a constant speed). Even when the outer diameter of the bar member 40 is small, the bar member 40 may be cut by the cutter 30 while rotating the first main shaft 6 and the bar member 40 in order to shorten the cutting time.

Then, the workpiece 40a cut out from the long bar material 40 to a predetermined length is held on the first main shaft 6 (chuck 6a), so that the clamp cylinder 27 is unclamped. , Drive cylinders 9, 10
And the like, the first headstock 5 is moved to the bed 3 by an arrow A.
The first main shaft 6 is opposed to the second main shaft 16 by rotating the first main shaft 6 by 180 ° in the direction. Then, the axis C1 of the first main shaft 6 is aligned with the axis C2 of the second main shaft 16, and the work 40a held on the first main shaft 6 (cut out from the long bar material 40 to a predetermined length). Part) is in a state where it can face the tool mounted on the turret tool post 13, that is, a state in which machining is possible.
Therefore, in the present invention, the bar material 40 is supplied toward the front surface (the chuck 6a side) of the first main shaft 6, and the bar material 40 is not supplied so as to penetrate through the inside of the main shaft as in the related art. It is not necessary to form a through hole in the first main shaft 6 or the like, and a bar member 40 having a large diameter can be machined.

Then, the first main shaft 6 is driven to rotate, and the turret 13a of the turret tool rest 13 is appropriately moved and driven in the directions of arrows G and H and arrows I and J via drive motors 13c 'and 13b'. Then, the first process is performed on the work 40a held on the first spindle 6. At the time of processing, the workpiece 40a is cut into a predetermined length from the long bar material 40 as described above, and the bar material 40 is not rotated while it is long as in the conventional case. No vibration is generated, so that the first main shaft 6 can be rotated at high speed. Further, it is not necessary to attach a draw tube, a filler tube, and the like to the first main shaft 6, and therefore, the bar material 40 is not limited to a tooth stick, and a black scale material can be used.

When the work of the first step on the first spindle 6 side of the work 40a (the portion cut out from the long bar material 40) is completed, the second headstock 15 is moved and driven in the direction of arrow F, The second headstock 15 is brought closer to the first headstock 5, and the work 40 a is attached to the chuck 6 of the first headstock 6.
a to the chuck 16 a of the second spindle 16. Then, after the second headstock 15 is moved and driven in the direction of arrow E to separate the second headstock 15 from the first headstock 5, the second spindle 16 is rotationally driven, and the turret of the turret tool rest 13 is rotated. 13a is appropriately moved and driven in the directions of arrows G and H, arrows I and J via the drive motors 13c 'and 13b', and the work 40a delivered to the second main shaft 16 is processed in the second step (back side). Processing). That is, work 4
The processing of the first step and the processing of the second step of Oa can be performed continuously.

While the workpiece 40a is being processed in the second step on the second spindle 16 side, the first spindle head 5 is turned 180 ° in the direction of arrow B with respect to the bed 3 so that the first spindle 6 The (chuck 6a) is directed toward the bar supply device 20 side.
Then, in the same manner as described above, the bar material 40 on the V-groove 23 is supplied to the first main shaft 6 in such a manner that the bar material 40 is pushed from behind by the bar material feed arm 25. When the workpieces 40a are cut out one after another from the bar material 40, the bar material 40 stacked on the V-groove 23 is gradually shortened, but the bar material feed arm 25 is moved in the directions of arrows K and L via the chain 26. Since it can be moved and driven in a wide range, the shortened bar member 40 can be suitably supplied to the first main shaft 6 from the V groove 23. Next, in the same manner as described above, after the distal end portion of the bar member 40 is gripped by the chuck 6a of the first main shaft 6, the bar member 40 is cut by the cutter 30, and a new workpiece 40 is cut.
a is cut out from the bar material 40.

Then, the last work 40a (the last work 4 cut out from the bar material 40) on the second spindle 16 side.
Immediately after the completion of the processing of the second step 0a), the processing of the first step of the new work 40a (the work 40a cut out from the bar material 40 this time) on the first spindle 6 side is started. That is, on the second spindle 16 side, the previous work 40a
While the processing of the second step is performed, a new work 40a can be cut out from the bar material 40 on the first spindle 6 side, so that the time required for the conventional bar material 40 to be cut off is reduced. Only the processing time can be shortened.
The processed workpiece 40a on which the second process has been completed on the second spindle 16 side is unloaded by the unloader 32.
Is transferred onto the unloading conveyor 33 and the unloading conveyor 33
Is transported outside the machine (outside the opposing spindle lathe 1).

In the above embodiment, the case where the first headstock 5 is rotated by 180 ° in the directions of arrows A and B has been described, but the first spindle 6 provided on the first headstock 5 is replaced with the second headstock. 1
6 (and the tool on the turret tool post 13) or the bar feeder 20 as long as it can be selectively opposed.
The rotation angle of the first headstock 5 is not limited to 180 °. That is,
The rotation angle of the first headstock 5 depends on the machine 2 and the bar feeder 20.
Depends on the layout relationship. For example, in the opposed spindle lathe 1 ′ shown in FIG. 10, the direction in which the bar material 40 is supplied from the bar supply device 20 to the machine 2 side (that is, the extension direction of the V-groove 23 and the like) is the axis C2 of the second spindle 16. The bar feeder 20 is disposed with respect to the machine 2 so as to form an angle of 90 ° with respect to the first headstock 5 in the directions of arrows A and B.
By rotating the first main shaft 6 by 0 °, the second main shaft 1
6 (and the tool on the turret tool post 13) or the bar supply device 20. The components of the opposing main spindle lathe 1 'are substantially the same as those of the opposing main spindle lathe 1 shown in FIG. 1, and therefore, the same reference numerals are given to the respective components, and the description thereof will be omitted.

In the above-described embodiment, as a bar material sending means, a bar material feeding arm 25 is provided so as to be movable and movable over a wide range via a chain 26, and the bar material feeding arm 25 allows the V material feeding arm 25 to move. The case where the bar material 40 loaded on the groove 23 is sent out to the first main shaft fifth side (the first main shaft 6 side) by pushing from behind has been described. Even if the bar member 40 is shortened (as the portion 40a is cut out), any configuration may be used as long as the bar member 40 can be sent out from the V-groove 23 to the first main shaft fifth side. For example, at the end of the V-groove 23 on the machine 2 side (the first headstock 5 side), a bar material feed roller is rotatably provided, and the bar material 40 is moved from the V groove 23 by the bar material feed roller. You may make it send out to the 5th side of one spindle.

In the above embodiment, the cutter 3
Although the case where 0 is provided separately from the turret tool post 13 (that is, on the cutter traverse table 29) has been described, the cutter 30 may be mounted on the turret tool post 13 or the turret tool post 13 may be provided. Second (separate from the first tool post)
May be provided in the machine 2 and the cutter 30 may be mounted on the second tool post. That is, the turret tool post 13 or the second tool post is used to perform machining such as turning of the work 40a, and the turret tool post 13 or the second tool post is moved to the first headstock 5 and the bar supply device 20. The workpiece 40a may be cut out from the bar material 40 by using the turret tool post 13 or the second tool post by moving the turret tool post 13 or the second tool post.

Further, in the above-described embodiment, the case where a round bar is used as the bar material 40 processed in the opposed spindle lathes 1 and 1 'has been described. Rod, octagonal rod, etc.) can also be used. Further, in the above-described embodiment, various bar materials 40
In order to align the axis CB with the axis C1 of the first main shaft 6, the V of the bar supply device 20 is adjusted according to the outer diameter of the bar material 40.
Although the case where the height of the groove 23 can be adjusted manually has been described, the height of the V groove 23 can be automatically adjusted (via a hydraulic or pneumatic cylinder or the like). May be. Also, the type of the bar material 40 (outer diameter, round bar, 6
Chucks 6a, 16 of the spindles 6, 16 in accordance with
The nail of a is automatically (for example, Japanese Patent Publication No. 62-18282).
(Via an automatic chuck jaw changer disclosed in US Pat.

[0037]

As described above, according to the present invention, according to the present invention, a body such as the bed 3 is provided, and the chuck 6 is attached to the body.
a first headstock 5 provided with a first spindle 6 provided with a first work holding means such as a, and a second head holding means provided with a second work holding means such as a chuck 16a. The second headstock 15 in which the main shaft 16 is rotatably driven , and the work mounted on those main shafts
A tool rest capable of performing processing is provided, and a bar material holding means such as a V-groove 23 is provided in a form capable of holding the bar material movably in the direction of the first headstock 5 while keeping the bar material long. The first headstock 5 is arranged so that the first work holding means of the first main spindle can be selectively opposed to the second work holding means of the second main spindle or the bar material holding means. The second headstock is provided so as to be pivotable with respect to the fuselage, and is relatively movably driven so as to approach and separate from the first headstock, and is held on the bar material holding means. A bar material supply means such as a stopper 17 and a bar supply device 20 for supplying the bar material by a predetermined length to the first work holding means of the first headstock facing the bar material holding means. And a first work holding of the first headstock on the bar holding means. The bar member 40 in the state of being held tip to stage, provided the bar material cutting means capable of cutting the bar
-From the bar material on the bar material holding means by the material cutting means
Separated and held by the first work holding means.
The workpiece in the previous state is returned to the state where it faces the second headstock.
In this case, the first headstock is swiveled to move.
Dynamic driving means, the tool rest and the first headstock are
With the first main shaft facing the second main shaft, the
Cooperate with the work held by the work holding means
The tool rest and the tool rest
The second headstock is attached to the work held by the second spindle.
Are arranged so as to be able to cooperate with each other to perform a machining operation, so that the bar is moved toward the first work holding means of the first main spindle in a state facing the bar material holding means. The bar 40 can be sent out from the bar holding means, and the bar 40
After the leading end of the first spindle is held by the work holding means of the first spindle, the long bar material 40 is cut into a predetermined length as a work to be processed by the first headstock through the bar material cutting means. Can be cut short and supplied. Therefore, the bar material 40
Can be supplied from the bar holding means to the first spindle in the form of a workpiece to be machined without penetrating the inside of the first spindle. The bar material 40 having a large diameter can be used. In addition, since the bar member 40 can be cut short before processing, the first main shaft can be rotated at high speed during processing, and a draw tube, a filler tube, and the like are not required. Can also process black scale materials. Further, the workpiece 40a cut from the bar member 40 can be transferred from the first main shaft facing the second main shaft to the second main shaft.
Therefore, the work 40a (the bar material 4) on the first spindle side is used.
When the processing of the first step of the portion cut out from 0 to a predetermined length) is completed, the work 40a is delivered from the first main spindle to the second main spindle, and the second main spindle side passes the work 40a. The first step and the second step can be performed continuously by performing two steps of processing (backside processing).
During the processing of the workpiece 40a on the second spindle side, the bar material 40 is supplied to the first spindle from the bar material holding means, and a new workpiece 40a can be cut out from the bar material 40. The processing time of the material 40 can be reduced. Also, the first for processing the workpiece
When cutting the bar material from the bar material holding means to the headstock of
To ensure that the bar does not move.
Work as a holding means, and the workpiece is cut from the bar material.
After being cut off, the cut work is
Transport means for transporting to a position where processing operation between
Role. This allows cutting
Sometimes the bar material is held, and
Such as a handling robot that transports the workpiece to the headstock.
There is no need for separate work handling means.
This can contribute to downsizing of the device.

[Brief description of the drawings]

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

FIG. 2 is a plan view showing details of the machine of the bar machining lathe shown in FIG. 1;

FIG. 3 is a front view of the machine shown in FIG. 2;

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

5 is a sectional view of the first headstock of the machine shown in FIG. 3 projected from the front.

6 is a cross-sectional view of the first headstock shown in FIG. 5 projected from a side surface direction.

FIG. 7 is a plan view showing details of a bar supply device of the bar machining lathe shown in FIG. 1;

FIG. 8 is a front view of the bar supply device shown in FIG. 7;

FIG. 9 is a side view of the bar supply device shown in FIG. 7;

FIG. 10 is a plan view schematically showing another embodiment of a bar processing lathe according to the present invention.

[Explanation of symbols]

 1,1 '... Bar turning lathe (opposite spindle lathe)3 ... Airframe (bed)  5 First headstock (first headstock) 6 First spindle (first spindle)6a First work holding means (chuck)  15 second headstock (second headstock) 16 second headstock (second headstock)16a: second work holding means (chuck) 17 ... Bar material supply device (stopper) 20 ... Bar material supply device (bar supply device)  23 bar material holding means (V-groove) 30 bar material cutting means (cutter) 40 bar material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-131801 (JP, A) JP-A-47-645 (JP, A) JP-A-4-46724 (JP, A) 121601 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23B 3/00-15/00 B23D 31/00-33/00 B23P 23/02 B23Q 7/00-7/04

Claims (1)

(57) [Claims] A first work holding means provided on the body, the first work holding means being provided on the first body;
A first headstock in which the spindle is rotatably provided, and
The second spindle provided with the second work holding means is a rotary drive.
Second headstock movably providedAnd their spindles
A tool post that can perform processing on a worn workpiece
A bar material holding means, and the first main shaft while the bar material is long.
The first headstock is provided so as to be movably held in a table direction, and the first headstock is held by a first work holder of the first spindle.
Holding means, the second work holding means of the second spindle or
In a form that can be selectively opposed to the bar material holding means,
For the bodySwivelThe second headstock is moved closer to and away from the first headstock.
In the opposite shape, provided relatively movably and freely, the bar material held on the bar material holding means does not have a predetermined length.
Of the first headstock facing the bar holding means.
Bar material supply means for supplying to the first work holding means
A first wire of the first headstock on the bar holding means.
Bar material with its tip held by the work holding means,Cutting
Bar material cutting means that can perform A bar on the bar holding means by the bar cutting means;
Separated from the workpiece and held by the first work holding means.
The workpiece in the state of being placed in a position facing the second headstock
To the state, the first headstock is swiveled to move.
Moving drive means for The tool rest and the first headstock are connected to each other by the first spindle.
The first work holding means in a state of facing the second spindle.
Cooperate with the workpiece held in
And arrange to get The tool rest and the second headstock are held by the second spindle.
To execute machining operations in cooperation with
Arranged and configured in the Bar processing lathe.