JPH10156665A - Indexing device for attachment of machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indexing device capable of reliably performing indexing of an attachment while restraining a machine tool from being enlarged and cost from being increased. SOLUTION: An indexing device is provided with an index head 11 provided on a table 2 of a vertical maching center and to be rotated while indexing the angle, and an attachment holding jig 12 provided on the index head 11 and for holding an attachment 3 attached to a ram 1 housing a main spindle. The attachment 3 is pinched in the attachment holding jig 12, the attachment 3 is unclamped by cutting servo force of the main spindle of the ram 1, a motor 11a of the index head 11 is operated, the attachment holding jig 12 is rotated by rotating the index head 11 while indexing the angle, and indexing of the attachment 3 is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an attachment indexing device for a machine tool.

[0002]

2. Description of the Related Art Conventionally, when an attachment attached to the tip of a main spindle of a machine tool is indexed, a motor of the main spindle is driven in a low-speed region and its torque force is used.

[0003]

However, if the rotational speed of the spindle is increased or the output torque of the attachment is increased in order to improve the machining capability, the torque of the motor of the spindle becomes insufficient. Or
Since the attachment is large and heavy, it is difficult to determine the attachment. Therefore, in order to improve the machining capacity as described above, the gear ratio that can drive the spindle in the low-speed range is further set, and the rigidity of the machine tool is increased so that a large motor can be installed on the spindle. Because of this, the size of the entire machine tool was increased, and the cost was increased.

[0004] In view of the above, an object of the present invention is to provide an indexing device that can reliably determine an attachment while suppressing an increase in the size and cost of a machine tool.

[0005]

According to a first aspect of the present invention, there is provided an indexing device for an attachment of a machine tool for solving the above-mentioned problems, wherein the indexing table rotates while determining an angle, and is provided on the indexing table. An attachment holding jig for holding the attachment is provided.

According to a second aspect of the present invention, there is provided an indexing device for an attachment of a machine tool for solving the above-mentioned problems, which comprises a ratchet device rotatable at a predetermined angle and rotatable while being stopped, and an attachment connected to the ratchet device. And an attachment holding jig for holding the holding member.

According to a third aspect of the present invention, there is provided an indexing device for an attachment of a machine tool for solving the above-described problems, wherein the rack, a guide rail provided along the rack, and a slide-movable guide rail. And an attachment holding jig rotatably supported by the slide block and holding an attachment, and a pinion provided on the attachment holding jig and meshing with the rack. Features.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the attachment indexing device for a machine tool according to the first invention is applied to a vertical machining center will be described with reference to FIG.
FIG. 1 is a schematic structural view of the main part.

In FIG. 1, 1 is a ram having a built-in spindle of a vertical machining center, 2 is a table of a vertical machining center, 3 is an attachment mounted on a spindle of the ram 1, 11 is an index table, and 12 is an attachment holding jig. It is.

The indexing table 11 is provided on the upper portion of the table 2, and can rotate while calculating an angle by the operation of a motor 11a. The attachment holding jig 12 is attached to the upper part of the indexing base 11, can rotate integrally with the indexing base 11, and can hold the attachment 3.

In such an indexing device, the attachment 3 is sandwiched between the attachment holding jigs 12, the servo force of the main shaft of the ram 1 is turned off, and the attachment 3 is unclamped. Then, when the motor 11 a of the indexing table 11 is operated, the indexing is performed. The table 11 rotates while calculating the angle,
Since the attachment holding jig 12 rotates with the rotation of the indexing table 11, the attachment 3 can be indexed.

Therefore, in order to improve the machining capacity, the rotational speed of the spindle of the ram 1 is increased, and the output torque of the attachment 3 is increased. That is, the torque of the spindle motor of the ram 1 is increased. Even if the force becomes insufficient or the attachment 3 becomes large and heavy, the attachment 3 can be reliably indexed.

Therefore, even when the machining capacity is improved as described above, a gear having a ratio capable of driving the spindle in a low speed range is further set, and the rigidity of the vertical machining center is set so that a large motor can be installed on the spindle. Since it is not necessary to increase the size of the vertical machining center, it is only necessary to add a device having a simple structure.

An embodiment in which the attachment indexing device for a machine tool according to the second invention is applied to a vertical machining center will be described with reference to FIG. FIG. 2 is a schematic structural view of the main part.

In FIG. 2, 1 is a ram having a built-in spindle of a vertical machining center, 2 is a table of a vertical machining center, 3 is an attachment mounted on the spindle of the ram 1, 21 is a ratchet device, and 22 is an attachment holding jig. It is.

The ratchet device 21 is provided on the upper portion of the table 2, and can rotate while stopping positioning at a predetermined angle (5 °). The attachment holding jig 22 has a base end supported by the ratchet device 21 and a front end capable of holding the attachment 3.

That is, the attachment holding jig 22 is
The base end is connected to the ratchet device 21 so that the front end can move in an arc while stopping at a predetermined angle.

In such an indexing device, the attachment 3 is sandwiched between the attachment holding jigs 22, the servo force of the main shaft of the ram 1 is turned off, and the attachments 3 are unclamped. When the ram 1 is simultaneously moved in the X-axis direction and the Y-axis direction (moving by an arc interpolation function) so as to move the tip side of the attachment circularly, the attachment holding jig 22 rotates while stopping at a predetermined angle at a predetermined angle. The attachment 3 is rotated while the positioning of the holding jig 22 with respect to the ram 1 is stopped by the above-mentioned angle at a time, so that the attachment 3 can be indexed.

Therefore, the same effect as in the case of the first invention can be obtained.

An embodiment in which the attachment indexing device for a machine tool according to the third invention is applied to a vertical machining center will be described with reference to FIGS. FIG. 3 is a schematic structural view of the main part, and FIG. 4 is a plan view of FIG.

3 and 4, reference numeral 1 denotes a ram having a built-in spindle of a vertical machining center, 2 denotes a table of a vertical machining center, 3 denotes an attachment mounted on a main shaft of the ram 1, 31 denotes a base, 32 denotes a rack, 33 is a guide rail, 34 is a slide block, 35 is a rotary shaft as an attachment holding jig, and 36 is a pinion.

The rack 32 is provided above the table 2 with the base 31 interposed therebetween. The guide rail 33 is provided on the base 2 on the upper portion of the table 2 along the rack 32.
1 are provided. The slide block 34
It is engaged with the guide rail 33 so that it can slide along the guide rail 33. The rotating shaft 35 has an axial center in the up-down direction, a lower end thereof is rotatably supported by the slide block 34 via a bearing 37, and an upper end thereof is fitted to a lower portion of the attachment 3 to hold the attachment 3. Is available. Pinion 36
Are integrally provided coaxially with the rotation shaft 35 so as to mesh with the rack 32.

That is, when the slide block 34 is slid along the guide rail 33,
The pinion 36 rotates in accordance with the movement of the shaft, and the rotating shaft 35 rotates.

In such an indexing device, the lower part of the attachment 3 is fitted to the upper end of the rotating shaft 35, the servo force of the main shaft of the ram 1 is turned off, and the attachment 3 is unclamped. The slide block 34 slides along the guide rail 33, the pinion 36 rotates with the movement of the block 34, and the attachment 3 moves with respect to the ram 1 with the rotation of the rotation shaft 35. Since the attachment 3 rotates, the attachment 3 can be indexed.

Therefore, the same effects as those of the first and second inventions can be obtained.

In each of the above-described embodiments, the table is provided on the table 2 of the vertical machining center. However, the table may be provided on a bed or the like.

In each of the embodiments described above, the case where the present invention is applied to a vertical machining center is described. However, the present invention is not limited to this. The same effect as that of the embodiment can be obtained.

[0028]

According to the attachment indexing device for a machine tool of the present invention, the rotational speed of the spindle is increased and the output torque of the attachment is increased in order to improve the machining capability of the machine tool. Or
If the torque of the spindle motor is insufficient or the attachment becomes large and heavy, the indexing of the attachment can be performed reliably only by adding a device with a simple configuration. It is not necessary to further set gears with a ratio that can be driven by the machine or to increase the rigidity of the machine tool so that a large motor can be installed on the spindle. Reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic structural view of a main part of an embodiment in which an attachment indexing device for a machine tool according to a first invention is applied to a vertical machining center.

FIG. 2 is a schematic structural view of a main part of an embodiment in which the attachment indexing device for a machine tool according to the second invention is applied to a vertical machining center.

FIG. 3 is a schematic structural view of a main part of an embodiment in which an attachment indexing device for a machine tool according to a third invention is applied to a vertical machining center.

FIG. 4 is a plan view of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ram 2 Table 3 Attachment 11 Indexing stand 12 Attachment holding jig 21 Ratchet device 22 Attachment holding jig 32 Rack 33 Guide rail 34 Slide block 35 Rotation axis 36 Pinion

Claims (3)

[Claims] 1. An attachment indexing device for a machine tool, comprising: an indexing table that rotates while calculating an angle; and an attachment holding jig provided on the indexing table and holding an attachment. 2. An attachment for a machine tool, comprising: a ratchet device rotatable while positioning and stopping at a predetermined angle; and an attachment holding jig connected to the ratchet device for holding the attachment. Indexing device. 3. A rack, a guide rail provided along the rack, a slide block slidably engaged with the guide rail, and rotatably supported by the slide block to hold an attachment. An attachment indexing device for a machine tool, comprising: an attachment holding jig; and a pinion provided on the attachment holding jig and meshing with the rack.