JPH07171730A - Pallet magazine for machining center - Google Patents

Abstract

PURPOSE:To efficiently change pallets and workpieces by a two-surface pallet magazine of simple and inexpensive structure. CONSTITUTION:In a vertical machining center 1 where a pallet P is changed with a work mounting surface Pa being vertical, a pallet magazine 11 is installed on the side of a bed 5. An arm member 13 is supported on a base 12 of the pallet magazine 11 in 180 deg. turnable manner around the axis (a) which is inclined by 45 deg. relative to the horizontal plane. A pair of pallet supporting tables 15 are arranged in an orthogonal manner to each other at the symmetrical position across the inclined axis (a) of the arm member 13. The respective pallet supporting tables 15 are turned and arranged at the pallet changing position and the workpiece changing position as the arm member 13 is turned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet magazine installed in a machining center, and more specifically, a pallet is mounted on a workpiece mounting surface in a vertical direction to replace the pallet.
The present invention relates to a two-sided pallet magazine in a machining center of a type in which a work mounting surface is horizontal and works are exchanged.

[0002]

2. Description of the Related Art In a machining center, a pallet is normally carried in and out in a vertical state, and a work is exchanged in a horizontal state of the pallet. Therefore, in the case of a multi-sided pallet magazine capable of holding a plurality of pallets, it is necessary to index the pallets to the vertical position and the horizontal position by another operation, which requires a long replacement time.

Therefore, conventionally, Japanese Patent Publication No. 1-52139 has proposed a four-sided pallet magazine as shown in FIG. The pallet magazine 31 is rotatably provided on the side of the machining center 1 around an axis parallel to the main shaft 2 and supports four pallets P on the outer periphery.
These are sequentially indexed at 90 ° intervals, and the work mounting surface Pa
The vertical pallet P1 is exchanged with the pallet P on the side of the machining center 1, and at the same time, the work can be exchanged on the pallet P2 whose work mounting surface Pa is horizontal.

[0004]

However, the conventional pallet magazine requires a mechanism for guiding the loading and unloading of the pallet on four sides, a mechanism for pivotally supporting the pallet, and the like, which complicates the structure. There was a problem that it became expensive. Also, the pallet exchange and the work exchange can be performed by the indexing operation only when the four pallets are sequentially used. For example, when the pallets at a position 180 ° apart are used next, the pallet exchange is performed. In addition to the indexing operation, an indexing operation for replacing the work is required, and there is also a disadvantage that the efficiency of replacement decreases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a new pallet magazine for a machining center which employs a two-sided pallet exchanging system having a simple and inexpensive structure and can efficiently perform pallet exchange and work exchange.

[0006]

In order to solve the above problems, in the pallet magazine of the present invention, the work mounting surface of the pallet is vertical to replace the pallet, and the work mounting surface is horizontal to replace the work. The machining center is provided with an arm member rotatable about an axis inclined at 45 ° with respect to the horizontal plane by 180 °, and a pair of pallet support bases are arranged in mutually orthogonal directions at symmetrical positions sandwiching the inclined axis of the arm member. The pallet support bases are arranged so as to pivot between a pallet exchange position and a workpiece exchange position as the arm member rotates.

[0007]

In the pallet magazine having the above structure, when the processed pallet is carried into one of the pallet support bases at the pallet exchange position, the arm member is rotated by 180 °,
The pallet support is placed at the work exchange position, and the work mounting surface of the processed pallet is held horizontally. Further, the other pallet support table that was in the work exchange position is arranged in the pallet exchange position, and the work attachment surface of the unprocessed pallet is held vertically. Then, the pallet at the pallet exchange position is carried out, and at the same time, the work is exchanged on the pallet at the work exchange position. Therefore, with the two-sided pallet magazine having a simple and inexpensive structure, the pallet exchange and the work exchange can be efficiently performed by one operation only by rotating the arm member by 180 °.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a vertical machining center will be described below with reference to FIGS. 1 and 2.
A main spindle 2 of a vertical machining center 1 is supported by a main spindle head 3 so as to be movable up and down in the Z axis direction, and the main spindle head 3 is provided by a saddle 4 so as to be movable in the X axis direction. A working table 6 is installed on the bed 5 of the machining center 1, and a pallet P is detachably mounted on the working table 6 with the work mounting surface Pa being vertical. The work W on the pallet P can be processed by a tool (not shown) attached to the spindle 4. Reference numeral 7 is an NC device.

A guide 10 is installed on the side of the bed 5, and the pallet magazine 1 of this embodiment is mounted on the guide 10.
1 is installed. Pallet magazine 11 is a guide board 1
0 is provided with a base 12 movable in the X-axis direction, and an arm member 13 is supported on the base 12 so as to be capable of reciprocating 180 ° about an axis a inclined by 45 ° with respect to a horizontal plane, and the arm member 13 A motor 14 that drives 13 is provided.

A pair of pallet support bases 15 for detachably supporting the pallet P are arranged at opposite ends of the arm member 13 so as to sandwich the inclined axis a in mutually orthogonal directions. The pallet magazine 11 is configured to pivotally arrange the pallet support bases 15 between the pallet exchange position A and the work exchange position B as the arm member 13 rotates. The pallet support base 15 is rotatably supported around an axis b orthogonal to the arm member 13 so that the pallet P can be rotated at the work exchange position.

Next, when the machining of the work W is completed in the vertical machining center 1 configured as described above, the pallet magazine 11 is moved to the position of the chain line in FIG. 2, and the processed pallet P is moved to the pallet changer (not shown). Thus, the work table 6 is transferred to the pallet support table 15 of the pallet magazine 11. Then, when the pallet magazine 11 is returned and the processed pallet P is carried into the pallet exchange position A, the arm member 13 is rotated 180 ° around the axis a inclined at 45 ° with respect to the horizontal plane.

Then, the pallet support base 15 at the pallet exchange position A is placed at the work exchange position B, and the work mounting surface Pa of the processed pallet P is held horizontally. Further, the pallet support base 15 at the work exchange position B is arranged at the pallet exchange position A, and the work mounting surface Pa of the unprocessed pallet P is
Are held vertically. In this state, pallet magazine 1
1 is moved to the transfer position, where the unprocessed pallet P is transferred to the processing table 6, and at the same time, the work W is exchanged on the pallet P at the work exchange position B.

As described above, in the vertical machining center 1 according to the present embodiment, the two-sided pallet magazine 11 having a simple and inexpensive structure allows the pallet exchange and the work to be performed in one operation by rotating the arm member 13 by 180 degrees. The exchange is carried out efficiently. Therefore, unlike the conventional method, it is not necessary to perform indexing in a separate operation for exchanging workpieces, and workpiece exchanging can be performed simultaneously with pallet exchanging using a loader or robot (not shown). Can be significantly shortened.

The present invention is not limited to the vertical type machining center, but can be applied to a horizontal type machining center as shown in FIG. 3. Besides, the shapes and the shapes of the respective parts are within the scope of the present invention. It is also possible to change the configuration as appropriate and embody it.

[0015]

As described above in detail, according to the present invention, an arm member rotatable by 180 ° about an axis inclined by 45 ° with respect to a horizontal plane is provided, and symmetrical positions sandwiching the inclined axis of the arm member are provided. Since a pair of pallet supports are arranged in directions orthogonal to each other and each pallet support is pivotally arranged between a pallet exchange position and a workpiece exchange position as the arm member rotates, The two-sided pallet mazine having an inexpensive structure has an excellent effect that pallet exchange and work exchange can be efficiently performed.

[Brief description of drawings]

FIG. 1 is a side view of a vertical machining center showing a pallet magazine according to an embodiment of the present invention.

2 is a front view of the machining center of FIG. 1. FIG.

FIG. 3 is a perspective view of a horizontal machining center showing a conventional pallet magazine.

[Explanation of symbols]

1 ... Machining center, 11 ... Pallet magazine,
13 ... Arm member, 15 ... Pallet support, A ...
Pallet exchange position, B ... Work exchange position, P..Pallet, Pa ... Work mounting surface, W ... Work, a ... Inclined axis.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihide Iwamura 5-25 Shimokoguchi, Oguchi-machi, Niwa-gun, Aichi 1 Okuma Co., Ltd. Oguchi Factory

Claims (1)

[Claims] 1. A machining center capable of rotating a pallet with a workpiece mounting surface vertical and replacing the pallet with a horizontal workpiece mounting surface, and capable of rotating 180 ° around an axis inclined 45 ° with respect to a horizontal plane. A pair of pallet supports are arranged symmetrically across the inclined axis of the arm members in a direction orthogonal to each other, and each pallet support is replaced with a pallet replacement position and workpieces as the arm members rotate. A pallet magazine for a machining center, which is configured so as to be pivotally arranged at a position.