JPS6125502B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses circular motion by circular interpolation of a horizontal numerically controlled machine tool controlled by three-dimensional orthogonal coordinates, X-axis, Y-axis, and Z-axis to move an indexing board installed on a pallet to a specified position. This invention relates to an indexing jig for indexing to an angular position.

In a processing device that performs processing while sequentially exchanging pallets between a pallet magazine that stores multiple pallets with workpieces attached to it and a horizontal numerically controlled machine tool, the workpieces are attached horizontally to the top surface of the pallet. In some cases, an indexing board is provided and a workpiece attached to the indexing board is indexed at a predetermined angle while processing is performed. In order to automatically index the indexing board, an indexing motor or the like must be provided on the pallet and must be connected to an external power source or hydraulic pressure source.

However, automation is difficult because the wiring or piping for connecting the motor on the pallet side to an external power source or hydraulic pressure source needs to be reconnected every time the pallet is replaced.

It is also possible to make a major design change to the machining table of a machine tool and perform indexing on a plane perpendicular to the table surface, but this would be uneconomical as the cost of the machine tool would increase significantly. .

The present invention was made in view of the above-mentioned conventional problems, and its purpose is to sequentially transfer pallets between a horizontal numerically controlled machine tool and a pallet magazine that stores a plurality of pallets with workpieces attached. In the processing equipment to be replaced, an indexing plate that vertically supports an indexing plate is provided on the upper surface of the pallet,
An object of the present invention is to provide an indexing jig which applies driving force by circularly interpolating the main axis of the machine tool to the driven axis of the indexing board to index the indexing board to a predetermined angular position. .

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view schematically showing the structure of the indexing jig of the present invention, in which most of the casing and the like are omitted. In the figure, an indexing jig 50 is mounted on a rectangular pallet 1. Reference numeral 2 denotes a cylindrical shaft having a rack 3 carved in the axial direction on its outer circumferential surface.The cylindrical shaft 2 is supported by a partially shown casing 40 so as to be movable in the axial direction, and is pressed toward the main shaft side by a spring 4. The end side is locked by a casing 40. A driven shaft 7 rotatably supported on the inner peripheral surface of the cylindrical shaft 2 has a key 7a in the cylindrical portion on one side and a hole 6 at an eccentric position on the end surface of the shaft on the other side. This hole 6 is the main shaft 3 of a horizontal numerically controlled machine tool.
It is possible to fit into a protrusion 31a provided at the center of the indexing tool 31 attached to the indexing tool 31.

A key 7a provided on the driven shaft 7 is movably engaged in the axial direction with a hollow portion of a hollow shaft 5 to which a pulley 8 is fixed, and the hollow shaft 5 is rotatably supported by a casing (not shown). The rotational force of the pulley 8 rotates an index plate 9 located perpendicularly to the upper surface of the pallet 1 through an illustrative transmission mechanism. That is, the pulley 11 fixed to one end of the shaft 10 and the pulley 8 are interlocked by a toothed belt 12, and are rotated by the meshing of the gear 13 fixed to the other end of the shaft 10 and the gear 15 fixed to the rotating shaft 14. The rotation is transmitted to the index plate 9 supported by the shaft 14. In this case, one revolution of the driven shaft 7 indexes the index plate 9 by, for example, 30 degrees. Note that the shaft 10 and the rotating shaft 14 are rotatably supported by a casing (not shown).

On the other hand, the segment gear 16 that meshes with the rack 3 carved on the driven shaft 7 is swung by the axial movement of the cylindrical shaft 2, and the segment gear 16 is connected to the shaft 17 via the shaft 17 to which the segment gear 16 is fixed on one side. A pinion 18 provided at the other end is rotated. A pin 20 having a rack 19 is engaged with the pinion 18. The pin 20 has a tapered tip, is fitted into a guide 21, and is constantly pushed upward by a spring 22. Further, on the back surface of the index plate 9, a block 23 is provided with positioning holes 23a provided at equal angular intervals on a circle centered on the rotation center.
a can be engaged at the indexed position. Note that axis 1
7 and the guide 21 are supported by a casing (not shown).

Next, the operation of this indexing jig will be explained.

First, the indexing tool 31 is mounted on the main shaft 30 of the horizontal numerically controlled machine tool, and the protrusion 31a of the indexing tool 31 is positioned in the hole 6 of the driven shaft 7 on the X, Y, and Z axes and fitted. do. Next, when the main shaft is pressed in the axial direction (Z direction) of the driven shaft 7, the cylindrical shaft 2 follows and moves, so the shaft 17 and pinion gear 18 rotate due to the meshing of the rack 3 and the segment gear 16.
The pin 20 moves down along the guide 21 against the force of the spring 22 and disengages from the hole 23a provided in the block 23. The indexing plate 9 can therefore be indexed.

Furthermore, the X-axis and the Y-axis are numerically controlled on the main shaft 30, and the eccentricity between the hole 6 and the rotation center of the driven shaft 7 is set as a semicircle, and relative circular motion is performed by circular interpolation around the rotation center of the driven shaft 7. and rotate the driven shaft 7.
Then, the key 7a and the hollow shaft 5 are engaged, so
The rotation of the driven shaft 7 is caused by a transmission mechanism, that is, pulley 8 → toothed belt 12 → pulley 11 → shaft 10 → gear 13 →
The indexing plate 9 can be indexed at a predetermined angle via the gear 15 and the rotating shaft 14. The indexing angle of this indexing plate is the pulley 8, pulley 11 and gear 13,
It can be arbitrarily selected depending on the number of teeth of the gear 14.
After the indexing is completed, the main shaft 30 is moved back to release the engagement between the driven shaft 7 and the indexing tool 31, and the cylindrical shaft 2 is returned to its original position by the spring 4, and the pin 20 is inserted into the hole 2.
3a to position the index plate 9.

Further, the indexing plate is not necessarily vertical, and the present invention can also be applied to an indexing plate in which the indexing plate is inclined at a certain angle.

As described above, in a processing device that sequentially exchanges pallets between a pallet magazine that contracts a plurality of pallets with workpieces attached thereto and a horizontal numerically controlled machine tool, the indexing jig of the present invention By providing an indexing board having an indexing plate in a vertical position and applying driving force by circularly interpolating the main axis of the machine tool with respect to the driven shaft of the indexing board,
It is possible to index to a predetermined angular position using a simple device without complicating the table structure on the machine tool side.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the structure of the indexing jig of the present invention. 1... Pallet, 2... Cylindrical shaft, 3... Rack, 4... Spring, 7... Driven shaft, 9... Index plate, 16... Segment gear, 17...
Axis, 20...pin, 23...block.

Claims (1)

[Claims] 1 A pallet that is removably placed on a processing table of a horizontal numerically controlled machine tool, a casing that is fixed to the upper surface of the pallet, and a pallet that is supported to be movable in the axial direction relative to the casing and that is A cylindrical shaft with a rack engraved therein and pressed by a spring on the main shaft side, and a circle formed by circular interpolation of the main shaft of a machine tool, which is rotatably supported on the inner surface of the cylindrical shaft and whose axial movement is regulated by the cylindrical shaft. A driven shaft that is driven by the movement, and a driven shaft supported by the casing, with positioning holes arranged in the radial direction at equal angular intervals on a circle centered on the rotation center, and located perpendicular to the upper surface of the pallet. an indexing plate to which a workpiece can be attached; a transmission mechanism for transmitting rotation of the driven shaft to the indexing plate; a segment gear supported by the casing and meshing with a rack provided on the cylindrical shaft; and the casing. a shaft that is supported by the casing and has the segment gear fixed to one side and a pinion gear on the other side; and a rack that is supported by the casing and meshes with the pinion gear, which can be engaged with and detached from the hole provided in the index plate. An indexing jig consisting of pins.