JPH05277804A - Numerically controlled machine tool - Google Patents

Abstract

PURPOSE:To enable efficiently working of various kinds of bars. CONSTITUTION:A long bar 99, is transfered as it is, from a bar supply unit 44 onto a bar feeding unit 50. The bar 99 is fed to a cutter 60 side to be held by means of clamps 55 and 56. The bar 99 is cut by means of a saw 64 to form a workpiece 99a having a predetermined length. The workpiece 99a is carried from front of the base 4 of the main tool 3 by means of a material handling device 20. The workpiece 99a is held by means of chucks 8 and 18 of main shafts 7 and 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerically controlled machine tool for processing various long bar materials.

[0002]

2. Description of the Related Art In the first example of conventional processing of bar material, a single long bar material is cut through a saw machine to cut a large number of works of a predetermined length from the bar material. The work was generated by supplying these workpieces to a lathe through human labor. Alternatively, before the supply to the lathe, the end surface of the work generated from the bar material is turned to form the center hole. In the second example of conventional processing of bar material, the bar material is supplied from the bar feeder behind the headstock through the hollow main spindle, and the bar material is rotated while being long,
A portion of the bar material projecting in the machining area in front of the main shaft is machined, and then the machined portion of the bar material is cut by turning. As a third example of conventional bar material processing, in Japanese Patent Laid-Open No. 3-111101, the bar material is supplied toward the front surface of the main shaft without passing through the main shaft, and the bar material is rotated in a long size. An example is shown in which the workpiece cut out from the bar material is machined after being cut by turning.

[0003]

However, in the first example, the management of a large number of works produced from one bar material is complicated, and the next step is not processed in real time after cutting. As a result, in-process inventory was generated and the total processing lead time was long. Also,
It was inefficient because equipment machines were required for each process of cutting, centering, and turning, and loading / unloading work and setup work of bar materials or works were required for each equipment machine. Further, in the second example, since the long bar material tends to vibrate, the spindle could not be rotated at high speed during processing. Therefore, the processing accuracy is lowered and the processing time is long. In addition, when the type (diameter) of the bar material is changed, it takes a lot of time to perform a setup change such as a replacement of a filler tube for preventing vibration in the main shaft. Also, as the bar material, a pestle bar must be used, and a black leather material cannot be used. Further, in the third example, when cutting the bar material by turning, it is necessary to support the bar material through the hollow high-speed rotation supporting device, and when changing the type of the bar material, Since it takes a lot of time to perform setup changes such as replacement, it is not possible to flexibly deal with changes in the type of bar material. Further, in the second and subsequent machining operations, the supply of the bar material to the spindle and the cutting of a new work from the bar material cannot be started unless the machining of the previous work is completed. There is a problem that the production efficiency decreases (the processing time of the bar material increases). Furthermore, many of the supply devices for supplying these bar materials are provided on the side of the lathe, and when the supply device is installed in addition to the lathe, a considerably long space is required. On the other hand, the supply device that supplies the bar material
What is provided in front of the lathe is installed so as to cover the entire front surface of the lathe, and its proximity to the work, workability such as maintenance and inspection of the lathe are poor, and improvement is desired.

In view of the above circumstances, it is an object of the present invention to provide a numerically controlled machine tool capable of suitably processing various long bar materials.

[0005]

The first aspect of the present invention is to provide a frame (4), a headstock (6, 16) on the frame (4), and a headstock (6, 16). Of the main shaft (7, 17) which can be driven to rotate, the work holding means (8, 18) on the main shaft (7, 17), and the work holding means (8, 18) on the frame (4). A tool rest (11, 13) capable of facing the machined work (99a), and the headstock (6, 16) and the tool rest (11, 1).
In a numerically controlled machine tool (1) for machining a workpiece (99a) by relative movement with respect to 3), a bar material supporting means (50) supports the bar material (99) so as to be movable in a predetermined feeding direction. Shape, the cutting means (64) is provided in a predetermined arrangement with respect to the main shaft (7, 17), and the cutting means (64) is provided at the cutting position on the delivery direction side with respect to the bar material supporting means (50). The bar material (99) supported through (50) is provided in a form that can be cut, and the bar material holding means (5
5, 56) when cutting the bar material (99) through the cutting means (64), the bar material is supported through the bar material supporting means (50) at a position corresponding to the cutting position. And a bar member (9) through which the work transfer means (20) is provided via the cutting means (64).
9) Work produced by cutting (99)
a) can be delivered to the work gripping means (8, 18) of the spindle (7, 17) from the front of the frame (4) with respect to the spindle (7, 17), and the headstock ( 6, 16) so as to be movable and driven relatively.

A second aspect of the present invention is the same as the first aspect of the present invention, wherein the bar material supporting means (50), the cutting means (64), and the bar material holding means (55, 5).
6) and the work transfer means (20) are arranged in front of the frame (4).

A third invention of the present invention is the same as the first invention, wherein the bar member holding means (56) is
A plurality of first members that can hold and release the bar material to be cut
And the work transfer means (20) has a plurality of second clamp means capable of holding and releasing the work produced by cutting ((a), (a), (b)). 28a, 28a, 28a, 2
9a, 29a, 29a), and these second clamping means are provided and arranged in a position where they do not interfere with the first clamping means.

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.

[0009]

According to the first aspect of the present invention, the relatively short work (99a) is cut out from the bar material (99), and the cut work (99a) is made into the main shaft (7,
17) from the front of the frame (4) to the spindle (7, 1)
It is delivered to the work holding means (8, 18) of 7) and acts so as to be turned. In addition, the bar supporting means (5
0), cutting means (64), bar material holding means (55, 5)
6) and the work transfer means (20) to the frame (4)
It acts so that it can be placed in front of. The second aspect of the present invention acts so as to reduce the overall length of the numerically controlled machine tool (1). Further, it acts so as to shorten the process distance for transporting the bar material (99) to the spindle as the work (99a) without disturbing the machining in the numerically controlled machine tool (1). Furthermore, the third aspect of the present invention is
The bar material holding means (56) and the work transfer means (20) are provided on the same circumference of the work (99a).
It acts so that a) can be retained in duplicate.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing an embodiment of a numerically controlled machine tool according to the present invention, that is, a bar processing lathe, and FIG.
A right side view of the bar material cutting and feeding device of the bar material processing lathe shown by arrow II-II in FIG. 3, and FIG. 3 shows a cutting machine and a material handling device of the bar material cutting and feeding device shown by arrow III-III in FIG. FIG. 4 is a detailed side view showing an example of the material handling device, and FIG. 5 is a view showing the engagement between the rear clamp of the cutting machine shown in FIG. 3 and the inner peripheral surface of the saw support.
(A) is the figure which looked at the inner peripheral surface of a front clamp and a saw support part from the front. (B) is the figure which saw the inner peripheral surface of a front part clamp and a saw support part from the side surface. FIG. 6 is a diagram showing the engagement between the front clamp of the cutting machine shown in FIG. 3 and the jaws of the material handling device, and FIG. 7 is a block diagram showing the control device of the bar processing lathe shown in FIG.

The bar material processing lathe 1 is, as shown in FIG.
It has an opposed spindle lathe 3 (hereinafter referred to as the main unit 3), and the main unit 3 is provided with a base 4. Base 4
A second headstock 16 is provided on the left side in the upper figure in a form fixed to the base 4, and a first headstock 6 is indicated by an arrow A + on the right side in the upper figure in the base 4. It is provided so as to be movable and driven in the A-direction. That is, the first headstock 6 can be moved toward and away from the second headstock 16 by the arrows A + and A-.
It is provided so as to be movable and driven in any direction. The first headstock 6 and the second headstock 16 need only be able to move toward and away from each other in order to transfer a work 99a, which will be described later, so that the second headstock 16 can be driven to move in the directions of arrows A + and A-. And the first headstock 6 may be fixed to the base 4, or both the first headstock 6 and the second headstock 16 may be moved toward and away from each other, Arrows A parallel to each other
It may be provided so as to be relatively movable in the + and A-directions.

As shown in FIG. 1, the first headstock 6 has a first headstock 7, and the second headstock 16 has a second headstock 17 in a moving direction of the headstock 6 (arrow A +, It is rotatably driven about an axis parallel to the (A-direction). The first main shaft 7 and the second main shaft 17 are arranged so as to face each other and have their axes aligned with each other. Chucks 8 and 18 on the first spindle 7 and the second spindle 17 are openable and closable so that they can grip an outer peripheral portion of a workpiece 99a, which will be described later, and are rotationally driven integrally with the spindles 7 and 17. It is provided freely.

Further, as shown in FIG. 1, on the base 4 of the machine 3, a first tool post 11 corresponds to the first headstock 6 and is located behind the headstock 6 (upward in the drawing). It is arranged so as to be movable in a direction perpendicular to the moving direction of the headstock 6. Further, on the base 4 of the machine 3, the second tool rest 13 is formed in a form corresponding to the second headstock 16
Is arranged rearward (upper side in the drawing) and is movable and driven in two directions parallel and perpendicular to the moving directions of the headstocks 6 and 16. That is, the turrets 11 and 13 are
At least, the headstocks 6 and 16 are movable and drivable in a direction perpendicular to the moving direction of the headstocks 6 and 16 so that they can move toward and away from the headstocks 6 and 16. With respect to the direction parallel to the direction, it may be provided so as to be movable and driven according to the moving direction and range of the corresponding headstock. (Thus, (not shown) the first turret 11
However, it may be provided so as to be movable in a direction parallel to the moving direction of the first headstock 6 (arrow A +, A- direction).
Further, in the configuration of FIG. 1 (not shown), arrows A +, A
With respect to the headstocks 6 and 16 that can be driven and moved relatively in the − direction, one tool post, for example, the second tool post 13 is used.
Is movably driven in a direction parallel and perpendicular to the moving direction of the headstock, and the headstocks 6 and 16 and the tool rest 1 are provided.
It is also possible to configure so as to cover the processing area formed by the relative movement of 3. ) Turrets 12 and 14 are attached to the turrets 11 and 13, respectively.
Is rotatably driven about an axis parallel to the moving directions of the headstocks 6 and 16.
On the outer circumferences of 2 and 14, a plurality of tool mounting positions are provided in the circumferential direction so as to be indexed by the rotation of the turrets 12 and 14. Tools such as a bite and an end mill are mounted at each tool mounting position.

Further, as shown in FIG. 1, the present device 3 is provided with a chip collecting device 5. That is, on the base 4 of the machine 3, as shown in FIG.
Are provided so as to correspond to the headstocks 6 and 16 and form an opening in parallel to the moving direction of the headstocks 6 and 16. In the chip bucket 5a, the chip conveyor 5b is provided.
Is movably provided along the tip bucket 5a in the direction of arrow A- in the figure, which is parallel to the moving direction of the headstocks 6 and 16. Therefore, the chips produced by machining the work with the headstocks 6 and 16 are collected in the chip bucket 5a,
Further, the chip is moved by the chip conveyor 5b to the arrow A in the figure.
− Transported in the direction and accumulated.

In front of the bar processing lathe 1 (lower side in FIG. 1),
That is, in front of the base 4 of the machine 3 (downward in FIG. 1), the bar material cutting / supplying device 41 is provided with a work area 2 in which a worker can work.
It is provided in a form that secures. Bar material cutting and feeding device 4
Reference numeral 1 denotes a base 42, on which a bar material feeding section 50 forms a long bar material 99 having an arbitrary shape (diameter) to be processed by various known means. The cutting machine 60 is provided such that it can be supplied in alignment with the rotation axis of the saw 64 of the cutting machine 60.

That is, for example, the bar material feeding section 50 has a support base that can be adjusted vertically in the vertical direction (vertical direction to the paper surface) manually or automatically, and the support base of the bar material feeding section 50 includes: A plurality of rollers are arranged in a straight line so that the long bar member 99 can be movably carried in the front-rear direction (arrow B1 +, B1-direction in FIG. 1), and can be freely rotated or rotationally driven. It is provided. A bar material supply unit 44 is provided on the side of the bar material delivery unit 50 (downward in FIG. 1). The bar material supply unit 44 has a shelf on which a plurality of long bar materials 99 can be stocked, and the shelf of the bar material supply unit 44 parallelizes the bar material 99 to the bar material delivery unit 50. In this state, the bar material feeding portion 50 is closely packed and stacked, and is inclined and fixed to the base 42 so as to descend toward the bar material feeding portion 50 side. Further, on the shelf, one bar material 99 is taken out of the plurality of bar materials 99 stacked on the shelf by a kicker or the like, and the bar material 99 is placed on the roller of the bar material feeding unit 50. It is provided so that it can be transferred.

Therefore, when processing with the bar material processing lathe 1, a plurality of long bar materials 99 stocked in the bar material supply unit 44 are taken out one by one by a kicker of the bar material supply unit 44, The bar material is fed onto the rollers of the feeding section 50. Then, according to the diameter of the bar material 99 taken out,
The entire support base of the bar material feeding unit 50 is vertically moved up and down to adjust the height of the roller (that is, when the bar material 99 has a small diameter, the bar material feeding unit 50 is lifted and the bar material 99 has a large diameter). In this case, the bar material feeding unit 50 is lowered.), So that the center of the bar material 99 on the roller is moved to the saw 6 of the cutting machine 60.
Align with the rotation axis of 4.

Further, a cutting machine 60 is provided in the delivery direction of the bar material delivery section 50 on the base 42 (the arrow B1-direction in FIG. 1). As shown in FIG. 2, the cutting machine 60 has a horizontal block-shaped horizontal feed table 61.
Is an arrow M + perpendicular to the bar material 99 on the bar material feeding section 50, that is, perpendicular to the feeding direction of the bar material 99 on the bar material feeding section 50 via the guide 61a and the motor 61b. , M-direction.
As shown in FIG. 3, a saw support portion 62 is fixedly provided on the horizontal feed table 61, and the saw support portion 62 has a shape in which the bar material 99 on the bar material feeding portion 50 is penetrated. It is formed in an annular shape and is arranged in front of the bar material feeding portion 50. An annular pulley 6 is provided on the outer peripheral portion of the saw support portion 62.
3 is rotatably driven in the directions of arrows N + and N- around the axis parallel to the central axis of the bar material 99 on the roller of the bar material feeding section 50 via the belt 63a and the motor 63b. It is provided.

The front surface of the pulley 63 (lower surface in FIG. 3)
An inner blade type saw 64 is attached to the outer peripheral portion of the outer peripheral portion with bolts fixed thereto. The saw 64 has a main body formed in an annular plate shape, and a material insertion hole 64a can penetrate the bar material 99 on the bar material feeding portion 50 at the center of the main body of the saw 64. It is perforated in shape. Further, the inner peripheral portion of the main body of the saw 64 (on the side of the material insertion hole 64a) is formed thinner than the outer peripheral portion, and a plurality of blades (tips) 64b are formed at the inner peripheral end of the main body of the saw 64. As shown in FIG. 2, they are mounted at equal intervals in the circumferential direction. The blade 6 for the main body of the saw 64
The attachment of 4b may be performed by brazing, or may be detachable and replaceable via a jig or the like. Also,
The plurality of blades 64b may be arranged at unequal angular intervals to prevent resonance during cutting. (In addition, the blade 64b may be replaced by detaching the blade alone or by attaching and detaching the whole body of the saw 64.)

Therefore, when cutting the bar material 99, which will be described later, the inner blade type saw 64 has a cross-sectional shape in which the outer peripheral portion is thick and the inner peripheral portion is thin, which is more than that of the outer blade type saw. Since the rigidity is high and the number of blades 64b that simultaneously engage with the bar material 99 (cut the bar material 99 at the same time) is large, vibration can be reduced. In addition, the life of the blade 64b is also improved.
In addition, the inner blade type saw 64 has the arrows M + and M- of the horizontal feed table 61.
By moving in the direction, it is possible to cut into the bar material 99 from both left and right sides in the figure, so that the bar material 9 having a large diameter
Also in 9, the bar material 99 can be cut in a fixed state without changing its orientation.

The rear clamp 5 is mounted on the base 42.
5 can fix the bar material 99 on the bar material feeding portion 50 at a position close to the rear of the saw 64 (upper side in FIG. 3), and the moving direction of the transverse feed table 61 of the cutting machine 60 (arrow M +, M
It is provided so that it can be opened and closed vertically in a direction perpendicular to the (-direction). The rear clamp 55 is inserted into the circular saw support portion 62 of the cutting machine 60, and when the traverse table 61 moves in the directions M + and M−, the inner peripheral portion and the rear portion of the saw support portion 62. The width of the outer portion of the rear clamp 55 is formed to be small so as to prevent the outer portion of the clamp 55 from interfering with each other.

That is, the rear clamp 55 is shown in FIG.
As shown in (b), it has L-shaped claw portions 55a, 55a, and each claw portion 55a has a gripping portion 55aa capable of gripping the bar material 99 in the circular saw support of the cutting machine 60. Part 6
Each of the two is formed so as to be inserted into the inside. The grip portion 55aa, as shown in FIG.
2 has a V-shaped cross section along the inner peripheral surface 62a, and the gripping portion 55aa is close to the saw 64 of the cutting machine 60 as shown in FIG. 5B. It is protruding.

Therefore, when the bar material 99 is not cut and the transverse feed table 61 of the cutting machine 60 is stopped, FIG.
As shown in (b) to (b), the grip 55 of the rear clamp 55 is provided.
aa is located substantially at the center of the circle of the inner peripheral surface 62a of the saw support portion 62. Then, when cutting the bar material 99, if the horizontal feed table 61 of the cutting machine 60 is moved in the direction of the arrow M + by the maximum stroke Lmax of the horizontal feed table 61, as shown on the left side of FIG. The inner peripheral surface 62a 'of the portion 62 and the grip portion 55aa of the rear clamp 55 are such that the C-shaped outer peripheral surface of the grip portion 55aa is along the inner peripheral surface 62a'. It is possible to avoid the interference of 62a '. Further, when the traverse table 61 moves in the direction of the arrow M-, as shown in the right side of FIG. 5A, the inner peripheral surface 62a ″ of the saw support portion 62 and the grip portion 55aa of the rear clamp 55 are
The C-shaped outer peripheral surface of the grip portion 55aa is the inner peripheral surface 62.
a ”along the gripping portion 55aa and the inner peripheral surface 62.
It is possible to avoid the interference of a ″.

In this way, the grip portion 55aa is attached to the inner peripheral surface 62.
Since the cross-sectional shape of the saw-tooth shape is along the shape of a, the saw support portion 62 does not have to have a quadrangular cross-section or the like for the same width.
Since the maximum stroke Lmax that can move the transverse feed table 61 can be made large without the inner peripheral surface 62a of the gripper 55aa of the rear clamp 55 interfering with each other, it is possible to cut the bar material 99 having a larger diameter. ..

Further, on the base 42, as shown in FIG. 1, the front clamp 56 fixes the bar material 99 on the bar material feeding section 50 at a position close to the front (right side in the drawing) of the saw 64. , The front clamp 56, as shown in FIG.
The opening / closing drive is provided in the vertical direction perpendicular to the moving direction of 1 (direction of arrow M +, M-).

As shown in FIG. 1, the bar material feeding section 50 and the cutting machine 60 are located on the side (right side in the drawing) of the main body 3 of the machine.
A material handling device 20 is provided in front of (in the figure, below). The material handling device 20 has a traveling unit 23, and the traveling unit 23 includes a servo motor 81,
It is movably provided in the directions of arrows D + and D- parallel to the axes of the main shafts 7 and 17 via the rails 21 and 21. In addition, below the traveling portion 23 (downward in FIG. 4), the
As shown in FIG. 7, a ball nut portion 83 having balls for bearings and the like built therein is provided.
3 is provided so as to be engaged with a screw portion 82 provided in a manner extending parallel to the rails 21 and 21. That is, by engaging the ball nut portion 83 and the screw portion 82,
A ball screw is formed, and the ball nut portion 83 is movably provided on the screw portion 82 in parallel with the rails 21 and 21. Further, the screw portion 82 is connected to a servo motor 81 which can be rotationally driven and positioned. That is, the traveling unit 2
3 rotates the servomotor 81, so that the main shafts 7 and 1 are driven through the screw portion 82 and the ball nut portion 83.
Rail 2 in the arrow D + and D- directions parallel to the axis of 7
It can be moved and driven on the Nos. 1 and 21 and arbitrarily positioned.

As shown in FIG. 4, the traveling portion 23 is provided with a cylinder 86. Inside the cylinder 86, the piston 85 moves in the moving direction of the traveling portion 23 (arrow D + due to air pressure, hydraulic pressure, etc.). , D-direction) and an arrow E perpendicular to
It is provided so that it can move in the + and E- directions. The amount of movement in the directions of arrows E + and E- is positioned at an arbitrary position by known electric control. The piston 85 is provided with the arm rod 24 extending in the directions of arrows E + and E−, and the piston 85 is provided with the guide rod 8
7 and 87 show the arrow E with the arm rod 24 sandwiched vertically.
It is provided so as to extend in the + and E- directions. A ram 88 is provided at the tips of these rods 24, 87, 87.

The bar material 99 on the cutting machine 60 is attached to the ram 88.
Also, a hand 26 that can hold the work 99a described later by air pressure, hydraulic pressure, or the like is detachably provided.
Is rotatably driven in the directions of arrows P + and P- with an axis perpendicular to the axes of the main shafts 7 and 17 as a center by pneumatic pressure or hydraulic pressure. That is, as shown in FIG. 4, the hand 26 has a swivel portion 27 that is attachable to and detachable from the ram 88, and the swivel portion 27 is centered on an axis perpendicular to the axes of the main shafts 7 and 17. And is rotatably driven in the directions of arrows P + and P-. A first gripper 28 and a second gripper 29 are opposed to each other on the revolving unit 27 and can be opened and closed in a radial direction so as to be able to hold a bar material 99 on a cutting machine 60 and a work 99a described later. It is provided with these grippers 2
A through hole 27a is formed in the center of each of the bars 8 and 29.
Also, the work 99a is formed so as to penetrate therethrough.
The first gripper 28 and the second gripper 29 can hold the bar material 99 and the work 99a, respectively.
Book jaws 28a, 28a, 28a and jaws 29a,
29a and 29a are provided so as to be openable / closable in the radial direction at equal intervals, and these jaws 28a and 29a are provided with claw portions 56a and 56a of the front clamp 56, as shown in FIG.
These claw portions 56a, 56b without interfering with a, 56b.
It is provided so as to be inserted between 56a and 56b. Further, the grippers 28 and 29 are rotated by the turning portion 27 so that the clamp 55 of the cutting machine 60,
The bar member 99 and the work 99a held by 56 can be selectively held by the gripper 28 or the gripper 29, and the jaws 28a, 2 of the grippers 28, 29 are held.
The shaft center of the workpiece 99a held by the shaft 9a is provided so as to be selectively aligned with the shaft center of the first main shaft 7 or the second main shaft 17.

By the way, the jaws 28a, 29a of the grippers 28, 29 are opened and closed by the following means known in Japanese Patent Laid-Open No. 2-71948. That is, the swivel unit 2
7 on each side where these grippers 28, 29 are provided,
Supporting portions that support the jaws 28a and 29a are formed, and the supporting portions support the jaws 28a and 29a.
Are linearly formed at equal intervals in a radial manner. In addition, the turning portion 27
Inside these supporting portions, rotatable jaw discs capable of moving the jaws 28a and 29a in the radial direction are respectively provided, and each jaw disc is provided in the swivel portion 27 with two discs. The air cylinders are provided so as to be independently rotatable. Further, in each opening / closing disc, three inferior arc-shaped opening / closing grooves capable of opening / closing each jaw are inclined toward the center of rotation (that is, the distance between the opening / closing groove and the center of rotation changes). The holes are formed at equal intervals, and the pins provided in the jaws are slidably fitted and engaged in the open / close grooves.

Therefore, the opening / closing disc is arranged such that the guide groove and the opening / closing groove intersect with each other, and the pins provided on each jaw are slidably fitted and engaged to rotate in the forward and reverse directions. By driving, the jaws 28a, 29a move in the radial direction along the guide groove via the pins provided in the jaws, toward and away from the center, so that the jaws 28a, 29a are moved. Can be opened and closed by gripping and separating the bar material 99. Further, as shown in FIG. 6, the jaws 28a, 29a of the first and second grippers 28, 29 have tab portions 56a, 56a of the front clamp 56, respectively.
56b without interfering with 56b.
Since it is provided so that it can be inserted between a and 56b,
Bar material 99 and work 9 held by front clamp 56
On the same circumference of 9a, the grippers 28 and 29 can also be gripped at the same time. Therefore, the front clamp 5
Even if the work 99a cut out from the bar material 99 by the cutting machine 60 while being held by the cutting machine 60 is a thin work 99a, the grippers 28 and 29 can surely grip the work 99a. Improves compatibility with. Each opening / closing disc is constantly pulled by a spring or the like with respect to the swivel portion 27, and the grippers 28, 2
9 normally keeps each jaw 28a, 29a closed. Further, two air supply pipes for supplying air as the driving force of the various drive source air cylinders are connected to the swivel portion 27.

Further, the bar processing lathe 1 has a control device 7
0 is provided. As shown in FIG. 7, the control device 70 has a main control unit 71, and the main control unit 71 includes a bar material cutting / supplying device control unit 72 via a bus wire 71a.
A material handling device controller 74, a machine controller 75, an input / output device 76, a system program memory 77, a data memory 78, a machining program memory 79, etc. are connected. Further, the bar material cutting / supplying device 41 is provided with a bar material data managing means such as a personal computer through an information storage medium 91 such as an IC card and a storage medium information reading / writing device 92 such as an IC card read / write. 93 can be connected. With such a configuration, accurate actual work information, for example, remaining material length data after cutting the bar material, can be fed back to the personal computer through the IC card. As a result, accurate inventory data of bar materials can be grasped and efficient inventory management becomes possible.
Further, it is possible to easily input the work schedule for each day to the IC card and give an accurate work instruction to the worker. Note that, in FIG. 7, the bar material cutting / supplying device control unit 72, the material handling device control unit 74, and the main unit control unit 75 are described separately, but inside a single PC (programmable controller). It may also be processed.

Since the bar material processing lathe 1 has the above-mentioned configuration, the main control section 71 of the control device 70 performs automatic operation based on the automatic operation program stored in the system program memory 77. In autonomous driving, first
The main control unit 71 drives and controls the bar material cutting and supplying device 41 via the bar material cutting and supplying device control unit 72, and the bar material supplying unit of the bar material cutting and supplying device 41 in which a large number of bar materials 99 are stored. From 44, one long bar material 99 is taken out by a kicker (not shown) or the like, and loaded on the bar material feeding unit 50.

Next, the main control section 71 drives and controls the bar material cutting and feeding apparatus 41 through the bar material cutting and feeding apparatus control section 72, and drives and controls the material handling apparatus 20 through the material handling apparatus control section 74. Then, the bar material 99 loaded on the bar material feeding section 50 of the bar material cutting and supplying device 41 is loaded.
Is positioned at a predetermined position with respect to the saw 64 of the cutting machine 60 so as to determine the length of the work 99a described later. Then, the bar material 99 on the positioned bar material feeding portion 50 is cut to generate a work 99a having a predetermined length.

That is, the traveling section 23 of the material handling device 20 is moved and driven in the direction of arrow D + in FIG. 1 while detecting the amount of movement (position) to bring it closer to the bar material cutting and feeding device 41 and to a predetermined position. Stop. Next, the bar material 99 on the bar material feeding section 50 of the bar material cutting and supplying device 41 is driven to move the bar material feeding section 50 forward (the arrow B1-direction in the drawing). Then, the tip end portion of the bar material 99 on the bar material feeding portion 50 is penetrated through the material insertion hole 64a of the saw 64 of the cutting machine 60, and further in front of the bar material cutting and supplying device 41 (arrow B1-in the figure). Direction) and abut on the closed first gripper 28 of the hand 26 of the material handling device 20.

Next, the first gripper 28 of the hand 26 of the material handling device 20 is opened, and the traveling portion 23 is driven to move in the direction of arrow D + in FIG. The first gripper 28 is closed and gripped by the tip of the bar member 99 protruding from the device 41. Then, the traveling unit 23 detects the amount of movement (position) and moves by an arrow D- for a predetermined distance corresponding to the length of the workpiece 99a described later.
The bar material 99 is pulled out from the bar material cutting / supplying device 41 by being driven to move in the direction. Then, the bar material 99 pulled out to a predetermined length is attached to the clamp 55 of the bar material cutting and feeding device 41,
Hold via 56 and secure.

At this time, if the length of the bar material 99 that has been pulled out is long (if it is a long work 99a), it is pulled out to a predetermined length by the material handling device 20, and then the first and second grippers 28 are used. , 29 are unclamped, and the long bar material 99 is moved through the through hole 27a of the hand 26 so as to move and drive the traveling portion 23 in the direction of arrow D + in FIG. Second gripper 2
The bar material 99 is gripped via 8, 29 (may be only the first gripper 28 or the second gripper 29) to hold the substantial center of gravity of the work.

Thus, by holding the long bar material 99 and the work 99a at the substantial center of gravity, the long bar material and the work are carried out at the time of the cutting work of the bar material and the work carrying work described later. Since the bending of the long bar material and the tip of the work can be made smaller than that of supporting the cantilever, the work produced by cutting can be reliably held by the grippers 28, 29 of the hand 26 of the material handling device 20. Can be grasped. Further, rather than cantilever support a long work, the rod 2 of the material handling device 20
4, 87, 87 and the rotation moment acting on the hand 26 can be reduced, so that the work can be reliably conveyed to the machine 3 side while maintaining the state parallel to the axes of the main shafts 7, 17. Not only possible, but also material handling device 2
0 mechanism, strength, etc. can be simplified. Further, it is possible to stably support the long bar material and the work due to the resonance and the like of the work due to cutting and transportation.

Then, the saw 64 of the cutting machine 60 is connected to the pulley 6
2 through the belt 63a and the motor 63b.
While being rotationally driven in the − direction, the horizontal carriage 61 is moved to the arrow M +
It is appropriately moved and driven in the M-direction. Then, the bar material 99 held via the clamps 55 and 56 of the bar material cutting and supplying device 41 is cut at a predetermined position via the saw 64. At this time, since the bar material 99 is fixed at positions immediately before and after the saw 64 via the front clamp 56 and the rear clamp 55, the bar material 99 is preferably cut through the saw 64.

Since the bar material 99 is cut by the bar material cutting / supplying device 41 not by turning but by rotating the saw 64 while the bar material 99 is fixed, a long bar is cut. A hollow rotary support device that supports the material 99 so that it can rotate at high speed is not necessary. Therefore, since the diameter of the bar member 99 is not limited by the inner diameter of the rotary support device, the bar member 99 having a large diameter can be dealt with.
9 types (diameter) can be changed flexibly. Further, as the bar material 99, a black skin material, a deformed material, or a polygonal material can be used in addition to the stick bar.

Further, in the above embodiment, the bar material 9
At the time of cutting 9, the bar material 99 was fixed using the front clamp 56 and the rear clamp 55, but it suffices that the bar material 99 can be securely fixed. For example, the bar material 99 is not used in the front clamp 56. Alternatively, the rear clamp 55 and the first gripper 28 (or the second gripper 29) of the hand 26 of the material handling device 20 may be fixed, or the bar material 99 may be fixed to the front clamp 56 without using the rear clamp 55. It may be fixed by the first gripper 28 (or the second gripper 29). Furthermore, you may fix only the 1st gripper 28 (or 2nd gripper 29) of the hand 26 of the material handling apparatus 20.

At the time of cutting, the bar material 99 is positioned based on the accurate movement of the traveling portion 23 whose movement amount (position) is numerically controlled by the control device 70 (material handling device control portion 74). By this, the work 99a having a predetermined length can be accurately cut out.
It is not necessary to turn the end surface of the work 99a prior to the above machining.

Then, the main control unit 71 drives and controls the material handling device 20 via the material handling device control unit 74, and drives and controls the main unit 3 via the main unit control unit 75 so that the bar material 99 is controlled. Work 9 cut into a predetermined length
9a is conveyed to the machine 3.

Next, after the work 99a cut into a predetermined length by the cutting machine 60 is held by the first gripper 28 and the front clamp 56 of the cutting machine 60 is unclamped, the material handling device 20 While detecting the amount of movement (position) of the traveling unit 23, the first gripper 28 of the hand 26 is driven by moving the traveling unit 23 in the direction of the arrow D- by a predetermined distance that does not interfere with the cutting machine 60 as it is conveyed to the main body 3 described later. The work 99a gripped in step (3) is moved away from the cutting machine 60. Next, the hand 26 holding the work 99a of the material handling device 20 is driven to project in the arrow E-direction via the arm 24 to move the work 99a from the front of the base 4 with respect to the headstocks 6 and 16. The work 3 is conveyed to an upper position between the headstocks 6 and 16 in the figure, and positioned so that the axis of the work 99a is aligned with the axes of the main shafts 7 and 17.

Next, while detecting the amount of movement (position) of the traveling portion 23 of the material handling device 20, the chuck 18 of the second spindle 17 of the second spindle stock 16 has an arrow D + for a predetermined distance capable of gripping the workpiece 99a. Drive to move in the direction. And
After the work 99a is held by the chuck 18 of the second main spindle 17, the first gripper 28 of the material handling device 20 is unclamped, the traveling unit 23 is moved and driven in the arrow D-direction, and then the arrow is passed through the arm 24. The hand 26 is driven backward in the E + direction to move the hand 26 away from the work 99a. As a result, the conveyance of the cut out work 99a to the main unit 3 is completed.

The above-described operation of transporting the cut-out work 99a to the main unit 3 is performed by the second headstock 16 with respect to the work 9a.
Although the work 9a is delivered, the work 99a can of course be delivered to the first headstock 6. That is, after the work 99a is conveyed between the headstocks 6 and 16 of the machine 3, the swivel part 27 of the hand 26 of the material handling device 20 is rotated 180 degrees in the direction of arrow P- in FIG. The workpiece 99a gripped by the one gripper 28 is opposed to the first headstock 6. Then, the headstock 6 is moved and driven in the direction of the arrow A + so as to approach the work 99a, and the work 99a is held by the chuck 8 of the first spindle 7. And
After holding the work 99a by the chuck 8 of the first spindle 7,
The first gripper 28 of the material handling device 20 is unclamped, and is driven backward in the direction of arrow E + via the arm 24 to move the hand 26 away from the work 99a. As a result, the delivery of the cut workpiece 99a to the first headstock 6 of the machine 3 is completed.

In this way, the work 99a cut out by the cutting machine 60 by rotationally driving the hand 26 of the material handling device 20 is used as the second headstock 1 of the main machine 3.
6 and the first headstock 6, both workpieces can be simultaneously processed by the two spindles when the workpiece 99a has only one machining step (only the first step). The processing efficiency is improved.

In this way, when the work 99a is supplied to the machine 3, the main controller 71 operates the machine controller 7 based on the machining program stored in the machining program memory 79.
The machine 3 is driven and controlled via 5 to process the work 99a. That is, the second spindle 17 (or the first spindle 7) is rotationally driven, the spindle headstocks 6 and 16 are appropriately moved, and the tool rest 11 is driven.
(Or the tool rest 13) is appropriately moved to drive the chuck 18
(Or chuck 8) turning of the workpiece 99a,
Processing such as milling.

The processed workpiece 99a is provided with a bucket (not shown) for unloading at the tip of the hand 26 of the material handling device 20, and the hand 26 of the material handling device 20 can be moved to the arrow E +, E as appropriate.
Workpiece 9 that has been machined by projecting and retracting in the -direction
The processed work 99a may be recovered by positioning the bucket at the recovery position where 9a falls and unclamping the work 99a held by the chuck 18 (or the chuck 8) at the recovery position. Also, work 9
Chips generated by the processing of 9a are collected in a chip bucket 5a of a chip collecting device 5 provided at the front part (downward in FIG. 1) of the headstocks 6 and 16, and further chip conveyor 5b.
Are transported, accumulated, and appropriately processed.

The material handling device 20 that conveys the work 99a is numerically controlled for the moving distance (position). Therefore, since the position of the work 99a is always recognized by the control device 70 from the time when the work 99a is cut out from the bar material 99, the tool rest 1 of the work 99a is processed at the time of machining.
It is not necessary to newly perform positioning (correction of blade edge position, etc.) with respect to Nos. 1 and 13, and machining can be efficiently performed.

As described above, the bar material 99 can be automatically processed only by the operator loading the bar material 99 into the bar material supply unit 44 of the bar material cutting and supplying device 41. That is, the conventional work that required setup of the bar material on the saw machine, setup of the work cut out from the bar material to the end surface processing machine (not shown), setup of the end surface processed work on the lathe, etc. Compared to the setup of the material (bar material or work) by the operator, the setup of the material by the operator can be significantly saved.

Further, the main controller 71 drives and controls the machine 3 through the machine controller 75 to process the work 99a while the bar cutting and feeding device controller 72 is operated. The bar material cutting / supplying device 41 is drive-controlled to cut out a new work 99a from the bar material 99.

That is, in the same manner as described above, the bar material 99 is pulled out from the bar material cutting / supplying device 41, and the cutting machine 60 (saw 6
The bar material 99 is cut through 4) to generate a new work 99a. That is, the cutting of the bar material 99 is performed by the machine 3
By performing through the external bar material cutting / supplying device 41, it is possible to efficiently perform the processing without affecting the processing of the processing machine.

At this time, the moving amount (position) of the traveling portion 23 of the material handling device 20 in the arrow D + and D- directions is appropriately changed according to the contents of the next processing, and the bar material cutting and feeding device for the bar material 99 is changed. By changing the withdrawal amount from 41, the length of the work 99a newly cut out from the bar material 99 can be appropriately changed. That is, for each processing
Since one work 99a can be cut out from the bar material 99, the length of the work 99a cut out from the bar material 99 can be easily changed to the optimum (necessary and sufficient) length for each processing content. Therefore, as compared with the conventional case where a large number of workpieces having a certain size are cut out at once from the bar material, the stock removal and the end material can be minimized, and the material can be effectively used. You can Further, by using the above-mentioned IC card, known bar material length measuring means (not shown), and bar material data management means 93 (personal computer), the residual material data of the bar material after cutting can be accumulated, and the residual material can be effectively utilized. Become.

Further, one work 99 is provided for each machining.
Since a can be cut out from the bar material 99, it is only necessary to manage a small number of bar materials 99 stored in the bar material cutting / supplying device 41 in order to manage the material. That is, as in the conventional case, a large number of works are cut out at once from the bar material, so that it is possible to manage the materials more efficiently than when it is necessary to manage a large number of works as materials. I can.

The main controller 71 drives and controls the machine 3 through the machine controller 75 to process the work 99a while the bar material cutting and feeding device controller 72 is operated. , The workpiece 99a having a predetermined length is cut and generated from the bar material 99, and when the machining of the previous workpiece 99a is completed in the machine 3, the material handling device 20 is immediately driven via the material handling device control unit 74. While the generated new work 99a is gripped by the gripper 28 of the hand 26, it is possible to unload the processed work and simultaneously load the new work 99a onto the spindle to start the processing. The total processing time can be shortened.

When all of the bar material 99 on the bar material feeding section 50 is used (processed), a new bar material is fed from the bar material supply section 44 of the bar material cutting and feeding device 41 in the same manner as described above. 99 is transferred to the bar material feeding section 50, and the work 99a is cut out from the new bar material 99 and the cut-out work 99a is processed. Therefore, a large number of bar materials 9
The processing of 9 can be continuously performed automatically for a long time.

In addition, the material handling device 20 is located in front of the base 4 of the machine 3 and close to the spindles 7 and 17,
Since the work 99a is provided so as to be delivered to the chucks 8 and 18 of the spindles 7 and 17, the bar material cutting and feeding device 41 is provided.
Can be arranged on the front side of the base 4 of the machine 3 (on the lower left side in FIG. 1). Therefore, the bar material 99 supplied from the bar material supply unit 50 of the bar material cutting / supplying device 41 is cut by the cutting machine 6
0 is cut into a workpiece 99a having a predetermined size, and the workpiece handling machine 20 cuts out the workpiece 99a by the machine 3
A series of processes such as handing over to the chucks 8 and 18 of the main spindles 7 and 17 can be performed without disturbing the processing of the main spindles 7 and 17 of the machine 3, and the bar material 99 is used as a work 99a up to the main spindles 7 and 17. Since the process distance to be conveyed can be shortened as compared with the case where the supply device 41 is placed on the side of the machine 3, the work 99a can be suitably conveyed.
It can be expected to shorten the total processing time and improve work efficiency. Further, the bar material cutting / supplying device 41 is connected to the base 4 of the machine 3.
By arranging it on the front side (lower left side in FIG. 1) of the machine tool, the total length of the machine tool including the bar material cutting and feeding device 41 is smaller than that of the conventional installation of the machine. Since it is also short, a long floor space is not required to install the machine 3, and the machine 3 can be installed favorably and the floor space can be effectively used. Further, since the work area 2 is secured as shown in FIG. 1 without blocking the entire front surface of the machine 3, compared to the conventional one in which the supply device is provided on the entire front surface of the lathe, The worker's proximity to the work and the workability of maintenance and inspection of the lathe are improved.

In the above embodiment, the machine 3
As shown in FIG. 1, the first headstock 6 has arrows A + and A-.
The second headstock 16 is fixed to the base 4, and the first tool post 11 is behind the first headstock 6 (upper in the figure) to move the headstock 6 in any direction. The second tool rest 13 is rearward (upper in the figure) of the second headstock 16 so as to be movable and driven in a direction perpendicular to the direction, and is parallel to and perpendicular to the moving direction of the headstocks 6, 16. It is provided on the base 4 so as to be movable and driven in two directions. However, the moving directions, arrangements and the numbers of the headstocks 6 and 16 and the tool rests 11 and 13 are determined by the material handling device 20 from the front of the machine 3 from the front of the main machine 3 to the workpieces 99a. The machine 3 may be configured in any way as long as it can be conveyed in between.

That is, for example, if the structure disclosed in FIG. 1 of Japanese Patent Laid-Open No. 57-48402 is replaced with the machine 3 shown in FIG. 1, the first headstock 6 moves in the directions of arrows A + and A-. It is provided so that it can be driven freely, and the second headstock 16 is fixed to the base 4. On the other hand, the first turret 11 is provided in front of the first headstock 6 (downward in the drawing) so as to be movable and driveable in two directions parallel and perpendicular to the moving direction of the headstock 6, and the second turret Reference numeral 13 may be provided behind the second headstock 16 (upper side in the drawing) so as to be movable and driven in two directions parallel and perpendicular to the moving directions of the headstocks 6, 16.

Further, for example, when the configuration disclosed in FIG. 1 of Japanese Patent Laid-Open No. 121103/1989 is replaced with the machine 3 shown in FIG. 1, the second headstock 16 is fixed to the base 4, The one headstock 6 is provided so as to be movable and driven in the directions parallel and perpendicular to the directions A + and A-. On the other hand, the first turret 1
Reference numeral 1 denotes a rear (upper side in the figure) of the first headstock 6, which is movably provided in two directions parallel and perpendicular to the moving directions of the headstock 6 indicated by the arrows A + and A-. 13 is the front of the second headstock 16 (downward in the figure), and is 2 in the direction parallel and perpendicular to the moving directions of the arrows A + and A- of the headstocks 6 and 16.
It may be configured so as to be movable and driven in any direction.

Further, the number of turrets may be one, for example,
If the configuration disclosed in FIG. 1 of Japanese Patent Publication No. 51-14186 is replaced with the machine 3 shown in FIG. 1, the first headstock 6 is provided so as to be movable in the directions of arrows A + and A−, and the second spindle is provided. The base 16 is fixed to the base 4. And the turret,
Behind these headstocks 6 and 16 (upper side in the figure), they are provided on the base 4 so as to be movable and driveable in two directions parallel and perpendicular to the moving directions of the headstocks 6 and 16. Is also good.

Further, the number of headstocks may be one. For example, if the configuration disclosed in FIG. 1 of JP-A-1-121104 is replaced by the machine 3 shown in FIG. A tailstock is movably driven in the directions A + and A-, and the second headstock 16 is fixed to the base 4. On the other hand, the first tool post 11 is behind the tailstock instead of the first headstock 6 (upper side in the figure), and is parallel to the moving direction of the tailstock instead of the headstock 6 in a direction perpendicular to the moving direction. The second tool rest 13 is provided in front of the second headstock 16 (downward in the figure) in a direction parallel to and perpendicular to the moving direction of the tailstock instead of the headstock 6. It may be provided on the base 4 so as to be movable and driven in any direction.

Further, only one tool rest and one headstock are sufficient. For example, when the configuration disclosed in FIG. 1 of Japanese Patent Laid-Open No. 62-244590 is replaced with the machine 3 shown in FIG. Instead of the base 6, a tailstock is fixed to the base 4, and the second headstock 16 is fixed to the base 4. Then, the tool rest is replaced with the tailstock and headstock 1 instead of the first headstock 6.
6 may be provided on the base 4 so as to be movable and driven in two directions parallel to and perpendicular to the spindle axis direction of the headstock 16 behind (upper side in the drawing).

Further, in the present invention, as the bar material 99, a solid bar material, a square bar (triangle, quadrangle, hexagon, 8
It is possible to process rods or pipes having various shapes such as a square shape), bent members, special shapes whose cross-sectional shapes are not constant in the axial direction, and rods or pipes having different diameters or sizes.

Further, in the above-described embodiment, the case where the bar material 99 is cut through the inner blade type saw 64 has been described. However, in cutting the bar material 99, the blade is provided on the outer peripheral portion of the disk. An outer blade type saw may be used. When an outer blade type saw is used, the direction of the bar material 99 with respect to the saw may be appropriately changed after the rotation angle is determined or the rotation angle is controlled during cutting. 9
It is not necessary to rotate 9 at high speed.

In addition, in this machine 3, Japanese Patent Publication No. 62-18282
In the automatic pawl changer disclosed in Japanese Patent No. 3, the pawls of the chucks 8 and 18 of the spindles 7 and 17 are automatically replaced according to the shape and size of the work 99a (bar material 99) to be processed. It may be provided.

[0067]

As described above, according to the first aspect of the present invention, the frame such as the base 4 and the headstock such as the first headstock 6 and the second headstock 16 on the frame, It is gripped by a spindle such as a first spindle 7, a second spindle 17 and the like which can be driven to rotate on the spindle stock, a work holding means such as a chuck 8 and a chuck 18 on the main spindle, and the work holding means on the frame. Tool post 1 that can face the workpiece 99a
In a numerically controlled machine tool such as a bar material processing lathe 1 having a tool rest such as a first tool post 13 and a second tool post 13 and processing the workpiece 99a by relative movement of the headstock and the tool post. The bar material supporting means such as the delivery unit 50 is used as the bar material 9
9 is movably supported in a predetermined feeding direction, is provided in a predetermined arrangement with respect to the main shaft, and a cutting means such as a saw 64 is provided.
The bar material 99 supported through the bar material supporting means at the cutting position on the delivery direction side with respect to the bar material supporting means is provided so as to be cut, and bar material holding means such as clamps 55 and 56 is provided. When the bar material 99 is cut by the cutting means, the bar material supported by the bar material supporting means is provided at a position corresponding to the cutting position so that the bar material can be held. In a form in which the work transfer means can transfer the work 99a generated by cutting the bar material 99 via the cutting means to the work holding means of the main shaft from the front of the frame with respect to the main shaft, Since it is provided so as to be movable and driven relative to the headstock,

By cutting the bar material 99 supported by the bar material supporting means by the cutting means, it is possible to generate a work 99a having a predetermined length from the long bar material 99. The workpiece 99a (a part of the bar material 99) is machined via the spindle head and the tool rest by bringing the transport means and the headstock close to each other and transporting the generated workpiece 99a to the spindle via the workpiece transfer means. You can do it. Therefore, since the work 99a can be supplied to the main spindle gripping means from the front of the main spindle without penetrating the inside of the main spindle, it is not necessary to change the fillers, tubes, etc. when changing the work size and shape, and various bar materials 99 can be attached. It can be efficiently and suitably processed. Further, since the bar material 99 is cut short as the work 99a during processing,
The spindle can be rotated at high speed, which enables highly accurate machining and shortens the machining lead time. Further, at the time of cutting, it is not necessary to rotate the bar material 99 at a high speed through the rotation support device, and the bar material holding means fixes and holds the bar material 99 from the outer shape side. As the bar material 99, black leather material, pipe, polygonal material, large-diameter material, etc. can be cut. Further, since the work transfer means is provided so as to transfer the generated work 99a from the front of the frame to the work gripping means of the main shaft, the bar material 99 can be attached to the work 9 without disturbing the processing.
Since the process distance for transporting to the main spindle as 9a can be shortened as compared with the case where it is transported over the main spindle by using a gantry robot or the like, the workpiece 99a can be suitably transported, and the workpiece transport can be performed. Reliability of the means is improved and work efficiency is improved.

A second aspect of the present invention is the same as the first aspect of the present invention, wherein the bar material supporting means, the cutting means, the bar material holding means, and the work transfer means are provided.
Since it is arranged in front of the frame, the total length of the numerically controlled machine tool can be shortened, the numerically controlled machine tool can be suitably installed, and the floor space can be effectively utilized. Further, since the process distance for transporting the bar material 99 to the spindle as the work 99a can be shortened without hindering the processing, the work 99a can be favorably transported, and the reliability of the work transport means is improved. Improves work and maintenance efficiency.

A third aspect of the present invention is the same as the first aspect of the present invention, wherein the bar member holding means holds a plurality of bar members 56 which can hold and release the bar member to be cut.
a, 56a, 56b and the like, and the work transfer means has a plurality of jaws 28a, 28a, 28a, 29a capable of holding and releasing the work produced by cutting. , 29a, 29a, and the like, and the second clamp means are arranged so as not to interfere with the first clamp means. And the work transfer means can overlap and hold the works 99a on the same circumference of the work 99a, and the work transfer means can simultaneously hold the thin work 99a that can be held by the bar material holding means. Since the thin work 99a can be conveyed with respect to the main shaft, the thin work 99a can be easily handled.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a numerically controlled machine tool according to the present invention, that is, a bar material lathe.

FIG. 2 is a right side view of the bar material cutting and supplying device of the bar material processing lathe shown by the arrow II-II in FIG.

FIG. 3 is a detailed view of the cutting machine and the material handling device of the bar material cutting and feeding device shown by the arrow III-III in FIG.

FIG. 4 is a cutaway side view showing an example of a material handling device.

FIG. 5 is a view showing the engagement between the rear clamp of the cutting machine shown in FIG. 3 and the inner peripheral surface of the saw support part, (a)
[FIG. 6] is a front view of the inner peripheral surfaces of the front clamp and the saw support portion. (B) is the figure which saw the inner peripheral surface of a front part clamp and a saw support part from the side surface.

6 is a diagram showing the engagement between the front clamp of the cutting machine shown in FIG. 3 and the jaw of the material handling device.

7 is a block diagram showing a control device of the bar material processing lathe shown in FIG. 1. FIG.

[Explanation of symbols]

 1 ... Numerically controlled machine tool (bar material processing lathe) 4 ... Frame (base) 6 ... Spindle stock (first spindle stock) 7 ... Spindle (first spindle) 8 ... Work gripping means (chuck) 11 …… Turret (first turret) 13 …… Turret (second turret) 16 …… Spindle stock (second spindle stock) 17 …… Spindle (second spindle) 18 …… Work gripping means (chuck) 20 ... Work transfer means (material handling device) 28a, 29a ... Second clamping means (jaw) 50 ... Bar material supporting means (bar material feeding section) 55 ... Bar material holding means (rear clamp) 56 ... ... bar material holding means (front clamp) 56a, 56b ... first clamp means (claw portion) 64 ... cutting means (saw) 99 ... bar material 99a ... work

Claims (3)

[Claims] 1. A frame, a headstock on the frame, a rotatable spindle on the headstock, a work holding means on the main shaft, and a work held by the work holding means on the frame. In a numerically controlled machine tool that has a tool rest that can face each other, and that processes a workpiece by the relative movement of the headstock and the tool rest, the bar member support means moves the bar member in a predetermined feeding direction. A bar which is provided in a predetermined arrangement with respect to the main shaft in a freely supporting form, and a cutting means supported by the bar material supporting means at a cutting position on the delivery direction side with respect to the bar material supporting means. The bar material holding means is provided in a form capable of cutting the bar material, and when the bar material is cut through the cutting means, at a position corresponding to the cutting position,
The bar material supported through the bar material supporting means is provided in a form capable of holding the work material, and the work conveying means cuts the bar material through the cutting means to generate the work, and the work of the spindle. A numerically controlled machine tool configured to be provided in a gripping means so as to be movable relative to the headstock so that the gripper can be delivered to and from the front of the frame. 2. The numerically controlled machine tool according to claim 1, wherein the bar material support means, the cutting means, the bar material holding means, and the work transfer means are arranged in front of the frame. 3. The bar material holding means has a plurality of first clamp means capable of holding and releasing the bar material to be cut, and the work transfer means is produced by cutting. A plurality of second workpieces that can hold and release the work
2. The numerically controlled machine tool according to claim 1, wherein said second clamping means is provided in such a manner that it is arranged at a position where it does not interfere with said first clamping means.