JP2003053634A - Rotary work table device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten an arrangement work time by automating arrangement work in turning an eccentric workpiece. SOLUTION: Linear guide parts 26 and 27 to receive a pallet P for mounting a workpiece so that the pallet P is put in/out and moved in the radial direction are provided on a table body 22 provided rotatably around its own center axis. A pallet clamp means 28 is provided to fix the pallet P for mounting the workpiece which is guided by the linear guide parts 26 and 27 and is mounted on the table body 22 to the table body 22 at an arbitrary work table radial position so that the pallet P is tightened and released. Weight members 43 and 44 changeable in mounting position are provided on the table main body 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary work table device used for a vertical lathe and the like, and more particularly to a rotary work table device for eccentric work.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 9, when an eccentric work W having turning peripheral surfaces A and B having different turning centers Ca and Cb from each other is to be turned by a vertical lathe, etc. In the turning step of the peripheral surface A, the eccentric work W is positioned so that the turning center Ca coincides with the rotation center of the rotating work table. In the turning step of the turning peripheral surface B, the turning center Cb rotates of the rotating work table. Positioning setup of the eccentric work W is performed so as to match the center, and the turning peripheral surface A
And the turning peripheral surface B are individually turned.

The turning peripheral surface A and the turning peripheral surface B as described above
In the turning process, if there is a rotational imbalance in terms of mass, a weight member is separately mounted on the rotating work table for balancing.

[0004]

In the prior art, when performing turning of an eccentric work as described above, every time the turning peripheral surface having a different turning center is turned, the setup work (core) is performed on the machine. This requires a lot of time to set up, which is inefficient. Also, since all the setup work is done manually by the worker, the burden on the worker is large and it takes time to finely adjust the centering.
The setup accuracy varies depending on the ability of the worker.

Further, since all the work of mounting the weight member on the rotary work table and performing the balancing is also done manually by the worker, the burden on the worker is large, and the setup involving balancing takes further time, and moreover, However, since the balancing work depends on the intuition and experience of the operator, variations occur and it is difficult to obtain a highly accurate balancing accuracy.

The present invention has been made to solve the above-mentioned problems, and the setup work in the turning of an eccentric work can be automated to shorten the setup work time.
At the same time, it is an object of the present invention to provide a rotary work table device equipped with an automatic balancing mechanism capable of obtaining stable setup accuracy, automating the balancing work, and quickly performing highly accurate balancing.

[0007]

In order to achieve the above-mentioned object, a rotary work table device according to the present invention is provided rotatably around its own central axis, and a work placement pallet can be moved in and out in a radial direction. A table main body having a linear guide portion that is movably received, and a work placement pallet mounted on the table main body that is incorporated in the table main body and is guided by the linear guide portion to position the work table pallet in any radial direction. And pallet clamp means for fixing to the table body so as to be able to be tightened and loosened.

In the rotary work table device according to the present invention, further, a stopper member is provided on the table body so as to be displaceable in a radial direction of the table body, and the work mounting pallet abuts on the stopper member. The structure is such that the position of the work placement pallet in the work table radial direction on the table body is variably positioned.

In the rotary work table device according to the present invention, as an automatic balancing mechanism, a weight member provided on the outer peripheral portion of the table body so as to be displaceable around the outer peripheral portion, and the weight member at an arbitrary outer peripheral portion peripheral position. It has a lock means for fixing it in a disengageable manner.

The locking means engages a series of engagement recesses provided in the table body around the outer periphery of the table body at equal pitches, and releasably engages with the engagement recesses provided in the weight member. Locating pins, spring means for urging the locating pins toward the engagement side with the engagement recesses,
A lock release / temporary locking which is fixedly arranged on a fixed side structure such as a fixed bed of the table main body, selectively disengages the locate pin from the engaging recess, and temporarily locks the weight member to the fixed side structure. And an actuator.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows the overall structure of a portal-type vertical lathe equipped with a rotary work table device according to the present invention.

The vertical lathe comprises a pair of left and right columns 11, 12
A cross rail member 13 vertically movable between the columns 11 and 12, and a saddle member 14 horizontally horizontally movable on the cross rail member 13.
Spindle device 1 provided on the saddle member 14 so as to be vertically movable
5 and a rotary work table device 16 arranged below the cross rail member 13.

Details of the rotary work table device 16 will be described with reference to FIGS. The rotary work table device 16 has a disk-shaped table body 22 on a fixed bed 21 that is fixedly arranged. As shown in FIG. 2, the table main body 22 engages with the rotation center shaft 24 fixed to the fixed bed 21 by a central bearing portion 23 provided at the center of the table main body 22, and thrust load by a thrust bearing 25. It is capable of rotating around its own central axis in a manner in which it is in charge.

On the upper surface of the table body 22, as shown in FIGS. 3 and 4, there are two linear guide rails 26 extending across the table body 22 in the radial direction.
27 is fixed in parallel. Linear guide rail 2
Tables 6 and 27 have a V-shaped cross section (see FIG. 1), and the work placement pallet P is placed on the rail surface so that the work placement pallet P can be moved in and out, and the work placement pallet P is in the rail extending direction. Guide linearly so that it can move in the radial direction.

Here, an outline of the work placement pallet P will be described with reference to FIG. The work mounting pallet P has an eccentric work (not shown), which is a workpiece, positioned and fixed on the pallet, and has slide engagement portions a and b with the linear guide rails 26 and 27 on the lower bottom surface. The engaging portions a and b are engaged with and disengaged from the table body 22 by an automatic pallet changer or the like in such a manner as to engage with the linear guide rails 26 and 27. Work placement pallet P
The lower bottom part of the pallet clamp plate 28 is described below.
Are provided with overhang-shaped jaws c and d.

As shown in FIGS. 3 and 4, a pallet clamp plate 28 is provided between the linear guide rails 26 and 27 on the upper surface of the table body 22. The pallet clamp plate 28 is for fixing the workpiece mounting pallet P at an arbitrary position in the radial direction of the table so as to be able to be tightened and loosened, and each piston of the plurality of hydraulic cylinder devices 29 attached to the table body 22. The hydraulic cylinder device 29 is fixedly connected to the tip of the rod 30.
Moves up and down in a horizontal position.

The supply and discharge of hydraulic pressure to and from the hydraulic cylinder device 29 are performed from the outside of the table body 22 via a rotary type movable joint (not shown) provided at the center of the table body 22.

The pallet clamp plate 28 engages with the jaws c and d of the work placement pallet P at both side edges 28a and 28b (see FIG. 1), and when the hydraulic cylinder device 29 drives the pallet down, the table diameter is reduced. Direction (the extending direction of the linear guide rails 26, 27), the work placement pallet P located at any position in the linear guide rails 26,
It is fixed to the table body 22 by being pressed onto 27.

When the work placement pallet P is moved in and out of the table body 22, the pallet clamp plate 2
8 is driven to move upward by the hydraulic cylinder device 29, so that the jaw parts c and d of the work placement pallet P are
Movement of the work placement pallet P with respect to the table body 22 in a substantially horizontal manner so as to enter or leave between the linear guide rails 26, 27 and both side edges 28a, 28b of the pallet clamp plate 28. Done by.

The table body 22 includes the table body 2
A stopper member 31 is provided for positioning the workpiece mounting pallet P on the position 2 in the radial direction of the table. The stopper member 31 positions the work mounting pallet P by contacting the end surface portion Pe of the work mounting pallet P, and the linear guide rails 26, 2 are provided.
7 is disposed in the vicinity of one end of the linear guide rail 26, and is slidably engaged with a linear guide portion 32 extending in the same direction as the extending direction of the linear guide rails 26 and 27, as shown in FIGS. And screw-engage with the feed screw 33,
3 allows the linear guide rails 26 and 27 to be displaced to the same direction as the extending direction, that is, to an arbitrary positioning position in the radial direction of the table body 22.

Outside the table body 22, as shown in FIGS. 3 to 6, a power driver device 35 is provided by a mounting table 34. The power driver device 35 is a hexagon wrench 3 that is rotationally driven by a motor 36.
7 is formed on the end portion of the feed screw 33 in a state in which the table body 22 is located at a predetermined initial rotation position by being guided by the linear guide portion 39 and moved forward and backward by the hydraulic cylinder device 38. The hexagonal wrench 37 is removably engaged with the hexagonal wrench hole 33a formed therein to drive the feed screw 33 to rotate.

As shown in FIG. 7, an annular upper guide rail 41 and a lower guide rail 42 are attached to the outer periphery of the table body 22 over the entire circumference thereof. Upper guide rail 41 and lower guide rail 42
The upper and lower guide rollers 45 attached to each of the two weight members 43 and 44 (see FIGS. 3 and 4) are engaged therewith. As a result, the weight members 43 and 44 are each displaceable around the outer periphery of the table body 22 over the entire circumference. The weight members 43 and 44 have the same weight and are symmetrically arranged on both sides of the pallet movement central axis by the linear guide rails 26 and 27.

The lower guide rail 42 has an engaging recess 46.
Are formed at a fine equal pitch over the entire circumference around the outer periphery of the table body 22 (see FIG. 8). Each of the weight members 43, 44 is provided with a locate pin 47 that is removably engaged with the engaging recess 46 so as to be vertically movable. Locating pin 4 is provided on each of weight members 43 and 44.
A compression coil spring 48 that urges 7 to the side (lower side) that engages with the engagement recess 46 is incorporated.

In the normal state, the locate pin 47 is fitted into and engaged with one of the series of engaging recesses 46 by the spring force of the compression coil spring 48, whereby the weight member 4 is engaged.
3 and 44 are connected and fixed to the table body 22 at arbitrary positions around the outer periphery of the table body 22 (each pitch interval of the engaging recesses 46).

As shown in FIG. 7, the fixed bed 21 is provided with a hydraulic cylinder device 50 for unlocking / temporarily locking by a mounting tool 49. The plunger (piston rod) 51 of the hydraulic cylinder device 50 is
By the ascending movement, the weight members 43 and 44 are tentatively locked to the fixed bed 21 side by penetratingly engaging with the through locking holes 53 formed in the guide plates 52 fixed to the weight members 43 and 44, respectively. Furthermore, locate pin 4
It abuts against the lock release plate 54 fixed to 7, and acts to separate the locate pin 47 from the engaging recess 46 against the spring force of the compression coil spring 48.

A cover member 55 that covers the arrangement of the weight members 43 and 44 is attached to the outer periphery of the table body 22 over the entire circumference.

Next, in the case where the eccentric work W as shown in FIG. 9 is attached to the rotary work table device 16 having the above-mentioned configuration to turn the turning peripheral surfaces A and B having different turning centers Ca and Cb from each other. The setup will be described.

It should be noted that the eccentric work W has an end face portion P at the center portion in the width direction of the work placement pallet P at the preparation stage.
It is assumed to be fixed at a positioning position defined in advance by the relative positional relationship with e.

In a state where the table main body 22 is located at a predetermined initial rotation position, the hydraulic cylinder device 38 advances the power driver device 35 to engage the hexagon wrench 37 with the hexagon wrench hole 33 a of the feed screw 33.
The hexagon wrench 37 is rotationally driven by the motor 36. As a result, the feed screw 33 rotates, and as shown in FIG. 3, the stopper member 31 is positioned at a position corresponding to turning of the turning peripheral surface A (center hole) (see FIG. 3). When the movement of the stopper member 31 is completed, the power driver device 35 is retracted by the hydraulic cylinder device 38, the hexagon wrench 37 is pulled out from the hexagon wrench hole 33a of the feed screw 33, and the power driver device 35 is separated from the table body 22 side. It

Next, the pallet clamp plate 28
Is moved upward by the hydraulic cylinder device 29, the jaws c and d of the work placement pallet P are moved to the linear guide rails 26 and 27 and the pallet clamp plate 28.
Of the work placing pallet P by moving the work placing pallet P substantially horizontally with respect to the table main body 22 by an unillustrated automatic pallet changer or the like so as to enter between the both side edges 28a, 28b. With the slide engagement portions a and b placed on the linear guide rails 26 and 27, the work placement pallet P is moved in the radial direction of the table body 22 by sliding on the linear guide rails 26 and 27.

This movement is performed until the end surface portion Pe of the work placing pallet P contacts the stopper member 31,
The end face Pe of the work placement pallet P is the stopper member 3
By making contact with No. 1, the turning center Ca of the turning peripheral surface A coincides with the rotation center of the table body 22. After that, the pallet clamp plate 28 is lowered by the hydraulic cylinder device 29, and both side edges 28a and 28b of the pallet clamp plate 28 are engaged with the jaws c and d of the work placing pallet P to place the work placing pallet. P is pressed against the linear guide rails 26 and 27 to fix the work placement pallet P to the table body 22.

After positioning and fixing the work placing pallet P described above, the table body 22 is placed at a position where the through locking hole 53 of the weight member 43 is aligned with the plunger 51 of the hydraulic cylinder device 50 for unlocking and temporarily locking. Rotate,
The plunger 51 of the hydraulic cylinder device 50 is driven to rise.

As a result, the plunger 51 penetrates through the through locking hole 53, and the weight member 43 is fixed.
The lock pin 54 is pushed up against the spring force of the compression coil spring 48 together with the lock release plate 54 by the plunger 51 to disengage the locate pin 47 from the engaging recess 46. As a result, the weight member 43 is separated from the table body 22.

Next, based on the calculation result of the new weight rotation angle corresponding to the eccentric moment of the work system, the table body 22 is rotated by a predetermined rotation angle, and the new weight mounting position is temporarily attached to the weight member 43. Place it in the stop position. After this, the upward drive of the plunger 51 by the hydraulic cylinder device 50 is released. As a result, the locate pin 47 moves down by the spring force of the compression coil spring 48 together with the lock release plate 54, and the locate pin 4 moves.
7 engages with the engagement recess 46 at the new position, and the plunger 5
1 comes out from the through locking hole 53.

As a result, the temporary locking of the weight member 43 to the fixed bed 21 side is released, and the weight member 4
3 is connected to the table body 22 at a new circumferential position.

With respect to the other weight member 44, the attachment position of the weight member 44 to the table body 22 is changed by the same operation.

As a result, the weight members 43 and 44 balance the table main body 22 while the eccentric work W is positioned and fixed to the table main body 22 together with the work placement pallet P.

After the turning of the turning peripheral surface A (center hole) is completed, the table main body 22 is positioned at a predetermined initial rotation position, and the pallet clamp plate 28 releases the clamp of the work placement pallet P, and the hydraulic cylinder device 38.
The power driver device 35 is moved forward, the hexagon wrench 37 is engaged with the hexagon wrench hole 33a of the feed screw 33, and the hexagon wrench 37 is rotationally driven by the motor 36. As a result, the feed screw 33 rotates, and as shown in FIG. 4, the stopper member 31 is positioned at a position corresponding to the turning of the turning peripheral surface B (eccentric peripheral surface) (see FIG. 4).
When the movement of the stopper member 31 is completed, the hydraulic cylinder device 38 retracts the power driver device 35, and the hexagon wrench 37 moves the hexagon wrench hole 33 of the feed screw 33.
Then, the power driver device 35 is separated from the table body 22 side.

Then, the work pallet P is slid on the linear guide rails 26 and 27 by an automatic pallet changer or the like to move the work pallet P in the radial direction of the table main body 22, and the end face Pe of the work pallet P is a stopper member. 31
Move until it touches.

As a result, the turning center Cb of the turning peripheral surface B
Coincides with the center of rotation of the table body 22. After this,
The hydraulic cylinder device 29 lowers the pallet clamp plate 28, and the pallet clamp plate 28 clamps the work placement pallet P.

Thereafter, the attachment positions of the weight members 43 and 44 to the table body 22 are changed by the same operation as the above-mentioned weight position changing operation. This allows
The weight members 43 and 44 balance the table main body 22 while the eccentric work W is newly positioned and fixed to the table main body 22 together with the work placement pallet P.

As can be understood from the above description, according to the rotary work table device of the present invention, the setup work in the turning process of the eccentric work can be automated to shorten the setup work time, and also the stable setup accuracy. In addition, the balancing work can be automated, high-accuracy balancing can be quickly performed, and the eccentric work can be efficiently turned.

[Brief description of drawings]

FIG. 1 is a front view showing the overall structure of a portal-type vertical lathe equipped with a rotary work table device according to the present invention.

FIG. 2 is a longitudinal sectional view showing an embodiment of a rotary work table device according to the present invention.

FIG. 3 is a plan view showing a positioning state at the time of turning a center hole of the rotary work table device according to the present invention.

FIG. 4 is a plan view showing a positioning state during turning of an eccentric peripheral surface of a rotary work table device according to the present invention.

FIG. 5 is a plan view showing an embodiment of a pallet positioning stopper portion of the rotary work table device according to the present invention.

FIG. 6 is a side view showing an embodiment of a pallet positioning stopper portion of the rotary work table device according to the present invention.

FIG. 7 is a side view showing an embodiment of a weight lock portion of the rotary work table device according to the present invention.

FIG. 8 is a plan view showing an embodiment of a weight lock section of the rotary work table device according to the present invention.

FIG. 9 is a plan view showing an example of an eccentric work.

[Explanation of symbols]

15 Spindle device 16 rotary work table device 21 fixed bed 22 table body 26, 27 Linear guide rail 28 Pallet clamp plate 29 Hydraulic cylinder device 31 Stopper member 33 lead screw 35 Power Driver Device 38 hydraulic cylinder 43, 44 Weight member 46 engagement recess 47 Locating pin 48 compression coil spring 50 hydraulic cylinder device 51 Plunger 53 Through hole P Work placement pallet W eccentric work

Continued front page    (72) Inventor Tadao Yamazaki             1-10-7 Higashi-Hashimoto, Sagamihara City, Kanagawa Prefecture F-term (reference) 3C016 AA03                 3C048 AA01 BC02 DD12 EE00 EE10

Claims (5)

[Claims] 1. A table main body, which is provided rotatably around its own central axis and has a linear guide portion that receives a work placement pallet so that the work pallet can be moved in and out in a radial direction, and the table main body is incorporated into the table main body. A rotary work table having: a pallet clamp means that is guided by a linear guide part to fix a work placement pallet mounted on the table body to the table body at an arbitrary position in the radial direction of the work table so as to be able to be tightened and loosened. apparatus. 2. A stopper member is provided on the table main body so as to be displaceable in a radial direction of the table main body, and the workpiece mounting pallet is brought into contact with the stopper member to mount the workpiece on the table main body. The rotary work table device according to claim 1, wherein the pallet is variably positioned in a radial direction of the work table. 3. A weight member provided on the outer peripheral portion of the table body so as to be displaceable around the outer peripheral portion, and a locking means for releasably fixing the weight member at an arbitrary outer peripheral portion peripheral position. The rotary work table device according to claim 1. 4. A disk-shaped table body rotatably provided about its own central axis, a weight member provided on an outer peripheral portion of the table body so as to be displaceable around the outer peripheral portion, and the weight member. A rotating work table device comprising: locking means that is detachably fixed to an arbitrary position around an outer peripheral portion. 5. The locking means is provided with a series of engaging recesses provided on the table body around the outer periphery of the table body at equal pitches, and is engageable with and disengageable from the engaging recesses provided on the weight member. A locating pin that engages, a spring means that urges the locating pin toward the engagement side with the engaging recess, and a locating pin that is fixedly arranged on a fixed side structure such as a fixed bed of the table body to selectively engage the locating pin. The rotary work table device according to claim 3 or 4, further comprising: a lock releasing / temporary locking actuator that is detached from the fitting recess and temporarily locks the weight member to the fixed-side structure.