JPS6243706Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to an automatic setup station provided in an automatic pallet changer (APC) for a machining center.

A system (FMS) for efficiently producing a wide variety of products has been developed and put into practical use, and numerically controlled machine tools such as machining centers have become an indispensable part of this system. As shown in FIGS. 1 and 2, the machining center 1 is usually attached with an automatic pallet exchange device 2 and a setup station 3, and the loader 4 of the automatic pallet exchange device 2
A pallet 5 on an automatic pallet exchange device 2 loaded with workpieces and the like is conveyed to the machining center 1 side.

By the way, by using the time when the machining center 1 is machining the workpieces on the pallet 5 transferred onto the table of the machining center 1,
At the setup station 3, workpiece setup changes are performed. An example of this work is shown in the third section.
To explain with reference to the figure and FIG. , push up the push cylinder 8 and fit the end fitting 9 of the telescopic cylinder 7 into the hook 10 fixed to the end face of the pallet 6. Then,
The pin 12 fixing the pallet carrier 11 and the pallet 6 is pushed down and removed from the hook 13 by a device not shown. Furthermore, by retracting the telescopic cylinder 7, the pallet 6 loaded with the workpieces is carried onto the setup station 3. The pallet 6 carried onto the rotation table 14 of the setup station 3 can be freely rotated on a horizontal plane by the shaft 15 and rollers 16 of the rotation table 14, either manually or by hydraulic pressure. , the pivot table 14 can be indexed into a predetermined position by means of a fixing device. Therefore, as shown in FIG. 5, the machining dimensions of the work 18 attached to each vertical surface (A, B, C, D surface) of the jig 17 fixed on the pallet 6 are checked, removed, and then The operator can attach the workpiece 18 to be machined as desired by rotating the turning table 14 without moving the workpiece 18. Also, work 18
The pallet 6 with the attached pallet is transferred by a telescopic cylinder 7 to a pallet carrier 11 of the automatic pallet changing device 2.

However, such a setup station 3
In this case, since the workpiece mounting surfaces (A, B, C, and D surfaces) of the jig 17 are vertical, it is difficult to attach the workpiece 18 to the jig 17, making positioning work difficult, and the mounting position accuracy is poor. There have been complaints that the work is difficult, and particularly when the workpiece 18 is heavy, it is extremely hard and dangerous work. Further, when the workpiece 18 has a complicated shape, there have been complaints that removing chips after machining is time-consuming and troublesome.

The present invention was developed in view of the above circumstances, and its purpose is to allow workpieces to be mounted and removed easily and safely, to allow workpieces to be mounted with high accuracy, and to avoid cutting chips. To provide a setup station that can easily perform removal work. Hereinafter, the present invention will be explained in detail with reference to the drawings.

6 to 14 show an embodiment of the present invention, and reference numeral 20 in the figures represents a base. One end of the base 20 is attached to the upper surface of the base 20 by a pin 23.
Tilting table 2 rotatably supported on base 20
1 is provided. A protrusion 21a provided on the lower surface of the tilting table 21 is provided in contact with a stopper 20a provided on the upper surface of the base 20. Further, between the tilting table 21 and the base 20, each end is connected to the tilting table 21 and the base 20.
Hydraulic cylinders (tilting drive devices) 22 are connected to the base 20 by pins, respectively, and the hydraulic cylinders 22 allow the tilting table 21 to move from the protrusion 21b provided on the lower surface to the stopper provided on the base 20. Pin 2 until it touches 20b.
It is designed to rotate 90 degrees around point 3.
A limit switch 24 for detecting the horizontal state of the tilting table 21 is attached to the upper part of the base 20 on the opposite side to the pin 23, and a limit switch 25 for detecting the vertical state of the tilting table 21 is attached to the pin 23. is attached to the base 20 in a lower position.

A swivel joint shaft 26 attached to the center of the tilting table 21 is rotatably provided with a swivel table 28 via a spherical bearing 27. A plurality of rollers 29 are rotatably supported on the circumference of the swivel joint shaft 26 and are in contact with the lower surface of the swivel joint shaft 26 . An annular swing gear 30 attached to the lower surface of the swing table 28 meshes with a swing pinion 32 fixed to the shaft of a hydraulic motor (swing drive device) 31 mounted on the swing table 21. The rotation table 28 is configured to rotate as the hydraulic motor 31 rotates.

Concave portions 28a are formed on the lower surface of the rotary table 28 at predetermined positions (four equally divided positions on the same circumference centered on the center of the rotary table 28), and ring-shaped bushings are formed in these concave portions 28a. 33 is fitted. A cylinder 35 is fixed to a mounting member 34 attached to the lower surface of the tilting table 21.
A yoke 37 is attached to the tip of the rod 36. In addition, a long hole 37 formed in the yoke 37
A pin 39 provided at the lower end of the movable shaft 38
The movable shaft 38 is provided so as to penetrate through the inside of a hollow guide member 40 attached to the tilting table 21. And the movable shaft 38
The upper end portion is provided to be slidable in the axial direction on the guide member 40, and inside the guide member 40, below the upper large diameter portion of the movable shaft 38, there is a spring 41 that always pushes the movable shaft 38 upward. It is provided. In the positioning device 42 configured as described above, when the rod 36 of the cylinder 35 is extended and the elongated hole 37a of the yoke 37 is released from the restraint of the pin 39 of the movable shaft 38, the elasticity of the spring 41 causes the upper end of the movable shaft 38 to be The rotating table 28 is configured to be stopped at a predetermined position by fitting into the recess 28a of the rotating table 28. Further, a protrusion 38a is fixed to the lower part of the movable shaft 38, and a limit switch 43 for confirming the rotation lock and a limit switch 44 for releasing the rotation lock, which are operated by the protrusion 38a, are attached to the mounting member 34.

Further, a multi-limit switch 45 is provided on the top surface of the tilting table 21, and this multi-limit switch 45 moves the origin position from the outside toward the center of the tilting table 21, as shown in FIG. Limit switch 46 for checking,
Limit switch 47 for detecting a turning angle of 270°,
Limit switch 48 for detecting a turning angle of 180°,
A limit switch 49 for detecting a turning angle of 90° and a limit switch 50 for detecting a turning angle of 0° are provided. The limit switches 50, 49, 48 are placed on the lower surface of the rotating table 28 facing the limit switches 50, 49, 48, 47 at positions shifted by 90 degrees in the circumferential direction from the center of the rotating table 28. , 47, an arc-shaped actuating piece 28 having a radius up to a position corresponding to .
b, 28c, 28d, 28e are attached, and these first, second, third, and fourth actuating pieces 2
8b, 28c, 28d, and 28e each have a width corresponding to the angle α in the circumferential direction of the turning table 28. Further, a fifth actuating piece 28f is attached to a position outside the first actuating piece 28b of the rotating table and facing the limit switch 46 for confirming the origin position. The position detection device 51 configured as described above has each actuating piece 28b, 28
c, 28d, 28e, and 28f are configured to detect each turning angle by contacting each limit switch 50, 49, 48, 47, and 46. In addition, each limit switch 50, 49, 4
8, 47, and 46 are the first to fifth actuating pieces 28, respectively.
The movable shaft 38 is configured to fit into each recess 28a of the rotary table 28 when it comes to the center of the movable shafts 28a, 28c, 28d, 28e, and 28f.

A pallet 5 is placed on the upper surface of the rotating table 28.
Telescope type cylinder 53 for carrying out and carrying in 2
is provided so that its proximal end can be rotated in a plane perpendicular to the turning table 28 by a pin 53c, and the distal end of the telescope type cylinder 53 can be moved up and down to the hook 54 of the pallet 52. A push cylinder 56 for attaching and detaching the end fitting 55 of the telescope type cylinder 53 is fixed. A pair of projections 53a and 53b are attached to the lower surface of the telescope type cylinder 53, and each of the projections 53 of the tilting table 21
A limit switch 57 for confirming the raising of the telescopic cylinder and a limit switch 58 for confirming the lowering of the telescopic cylinder are installed at positions facing a and 53b, respectively.

Further, a pair of guides 59 are provided on the upper surface of the turning table 28, and are installed in parallel with each other at an interval.
A plurality of rollers 60 are rotatably provided along the longitudinal direction of the roller 9 . A plurality of hooks 61 fixed to the pallet 52 are engaged with the guide 59, and the pallet 52 is provided so as to be movable in the horizontal direction along the guide 59 by the guide 59 and rollers 60. Furthermore, at least one hook 61 provided on one side of the pallet 52
One end 62a of the rocker 62 attached to a pin 64 rotatably supported by a pair of support pieces 59a, 59a fixed to the guide 59 is engaged with the recess 61a at the bottom of the rocker 62. end 6
By moving the lever 63 provided on the lever 2b up and down, the one end 62a of the rocker 62 is rotated about the pin 64 in a plane perpendicular to the guide 59, so that it can be attached to and removed from the recess 61a. It is composed of A torsion spring 65 is provided between one end of the pin 64 and one of the branch pieces 59, and the torsion spring 65 is configured to always hold the rocker 62 at the locking position a.

A workpiece mounting jig 66 is attached to the pallet 52, and the workpiece mounting jig 66 is provided with an edge locator 68 for mounting the workpiece 67 in a predetermined position with high precision, and a stopper 69 for fixing the workpiece 67. It is being

The hydraulic cylinder 22 for tilting is connected to a first electromagnetic directional control valve 70 via pipes P ₁ and P ₂ , and the solenoid of this first electromagnetic directional control valve 70 is
The tilting table 21 is configured to be placed in a vertical or horizontal state by respectively exciting S ₁ and S ₂ . Further, the hydraulic motor 31 is connected to a second electromagnetic directional switching valve 71 via pipes P ₃ and P ₄ , and by energizing the solenoids S ₃ and S ₄ of the second electromagnetic directional switching valve 71, respectively. ,
The hydraulic motor 31 is configured to rotate forward or reverse. Furthermore, the positioning cylinder 35 is connected to a third electromagnetic directional control valve 72 via pipes P ₅ and P ₆ .
The rotary table 28 is configured to be locked or unlocked by energizing the solenoids S ₅ and S ₆ respectively. Furthermore, the telescope type cylinder 53 is connected to a fourth electromagnetic directional control valve 73 via pipes P ₇ and P ₈ , and the solenoids S ₇ and S ₈ of this fourth electromagnetic directional control valve 73 are energized, respectively. By doing so, the telescopic cylinder 53 is extended or contracted. Further, the push cylinder 56 is connected to the fifth electromagnetic directional control valve 7 via a pipe _P9 .
4, and this fifth electromagnetic directional control valve 7
By energizing the four solenoids S ₉ and S ₁₀ , respectively, the push cylinder 56 is extended or contracted. In addition,
First, second, fourth electromagnetic directional valves 70, 71, 7
3 is provided with a hydraulic lock mechanism for safety even in the event of an electrical cutoff.

Next, the operation of the automatic setup station configured as described above will be explained.

First, the pallet 52 is an automatic pallet exchange device.
Swivel table 2 of setup station PS from APC
8 is carried along the guide 59 and rollers 60 by operating the telescopic cylinder 53 and the push cylinder 56.
In FIG. 7, the operating force is released from the lever 63, which had been operated to the release position b prior to carrying in this pallet. As a result, the lever 63 is rotated by the torsion spring 6.
The recess 61a of the hook 61 of the pallet 52 is rotated from the release position b to the lock position a by the tension of the pallet 52.
One end 62a of the rocker 62 is fitted into the locker 62 to fix the pallet 52 on the turning table 28. Next, by energizing the solenoid S ₁ , the tilting hydraulic cylinder 22 is operated to rotate the tilting table 21 clockwise about the pin 23 .
Then, the tilting table 21 rotates 90 degrees until its protrusion 21b comes into contact with the stopper 20b of the base 20, and the E surface of the workpiece mounting jig 66 becomes horizontal on the upper side. At this time, the F of the workpiece mounting jig 66
The workpiece on the surface faces downward on the lower side, and foreign matter such as chips adhering to the workpiece falls and is removed. Next, in the above state, the stopper 69 is removed and the workpiece 67 is removed, the machining dimensions are inspected, or the next workpiece 67 is installed at a predetermined position using the edge locator 68 and the stopper 69. This work can be performed extremely easily and safely since the work mounting surface is in a horizontal state. In addition, when the work 67 is heavy, the work 67 is lifted by a crane device (not shown) and the work is replaced.

Furthermore, by energizing the solenoid _S6 and retracting the rod 36 of the positioning cylinder 35,
The movable shaft 38 fitted into a recess 28a bored at a position corresponding to a rotation angle of 0° on the lower surface of the rotary table 28 is removed, and the rotary table 28 is unlocked. When the limit switch 44 detects that the rotation table 28 is unlocked, the solenoid S ₃ or S ₄ is energized to rotate the rotation table 28 forward or reverse. When the turning table 28 rotates and the limit switch 48 for detecting a turning angle of 180° comes into contact with the third operating piece 28d of the turning table 28, the solenoid _S5 is energized to extend the rod 36 of the positioning cylinder 35. Then, the movable shaft 38 comes into contact with the lower surface of the turning table 28 due to the elasticity of the spring 41, and the turning table 28 continues to rotate in this state. Then, when the turning table 28 reaches the position where the turning angle is 180°,
The movable shaft 38 is further fitted into the recess 28a of the turning table 28 by the action of the spring 41. At the same time, the protrusion 38a comes into contact with the limit switch 43, so the signal causes the solenoid that was energized to
Hydraulic motor 3 by demagnetizing S ₃ or solenoid S ₄
Stop the rotation of 1. Therefore, the turning table 2
8 is accurately stopped at a position with a turning angle of 180 degrees, and the F surface of the workpiece mounting jig 66 faces horizontally upward. Then, the workpiece 67 is replaced or inspected.

Next, the solenoid _S2 is energized to reduce the tilting hydraulic cylinder 22, and the tilting table 21 is
return to its original horizontal state. Furthermore, the lever 63 is moved to the release position b to disengage the pallet 52,
The telescope type cylinder 53 and push cylinder 56 are operated to move the pallet 52 to the automatic pallet changing device APC. This completes a series of setup operations at the setup station PS.

It goes without saying that the operation of the lever 63 for attaching and detaching the pallet 52 may be automated using a hydraulic cylinder or the like.

As explained above, the present invention includes a tilting table that is raised and lowered by a tilting drive device, a swivel table that is rotated on the tilting table by a swivel drive device, and a swivel table that is stopped at a predetermined position by the output of a position detection device. Even if a workpiece is mounted vertically on a pallet, it can be brought into a horizontal position with a very simple operation, making it easier to set up and remove workpieces or perform setup work such as dimension inspection. Not only can this be done safely and easily, but the workpiece can also be mounted with high precision.
Further, removal of chips after machining can be easily carried out by turning the work horizontally downward. Therefore, compared to conventional setup stations, setup work can be done more quickly and with less labor.
It has the excellent effect of extremely high efficiency.

[Brief explanation of the drawing]

Figures 1 to 5 show a conventional setup station, with Figure 1 being a plan view, Figure 2 being a side view, Figure 3 being an enlarged plan view, and Figure 4 being an enlarged side view.
Figure 5 is an explanatory diagram showing the mounting state of the workpiece, Figure 6
14 to 14 show an embodiment of the present invention, FIG. 6 is a side view, FIG. 7 is a sectional view, FIG. 8 is a sectional view of the positioning device, and FIG. 9 is a -
10 is a side view of the position detection device, FIG. 11 is a view taken along the line XI-XI in FIG. 10, FIG. 12 is a view taken along the line XII-XII in FIG. 7, and FIG. The figure is a side view of the workpiece mounting jig, and FIG. 14 is a piping diagram showing the hydraulic circuit. 20...Base, 21...Tilt table, 22
...Hydraulic cylinder (tilt drive device), 28...Swivel table, 31...Hydraulic motor (swivel drive device), 42...Positioning device, 51...Position detection device, 52...Pallet, 67...Work .

Claims (1)

[Scope of utility model registration request] In an automatic setup station that installs workpieces on a pallet or removes workpieces from the pallet, a tilting table is provided on a base so as to be able to be raised and lowered, and a tilting table is provided between the base and the tilting table and the a tilting drive device for raising and lowering a tilting table; a rotary table to which the pallet is detachably attached and rotatably provided on the tilting table; and a rotary table provided on the tilting table and rotating the rotary table. 1. An automatic setup station comprising: a rotation drive device for rotating the rotation table; a position detection device for detecting the angle of the rotation table; and a positioning device for stopping the rotation table at a predetermined position based on the output of the position detection device.