JPS599301B2 - horizontal index - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a horizontal index for reliably fixing the relative position of a workpiece to a processing cutter after it has been rotated by a predetermined angle, and its purpose is extremely simple. It is an object of the present invention to provide a horizontal index that can securely fix relative positions corresponding to various angles through a simple configuration.

Another object of the present invention is to provide a horizontal index capable of performing each of the operations of fixing for processing and opening for rotation in one movement.

Still another object of the present invention is to provide a horizontal index that acts to further strengthen the holding force of a force-receiving body in response to the occurrence of chatter in a cutter during processing.

EMBODIMENT OF THE INVENTION Below, the structure of the apparatus of this invention is concretely demonstrated based on the drawing which shows an Example.

In Figures 1 to 3, 1 is the bottom plate, 2 is the side plate,
In the embodiment, the side plates 2 are shown to have a rectangular shape, and a pair of side plates 2 are fixed to both ends of the bottom plate 1 at right angles so as to be symmetrical to each other.

The side plates 2, 2 each have shafts 3, 3 protruding from the outside.
Bearings 4, 3 are provided in a direction along a common axis X parallel to the bottom plate 1, so that the combination of the bottom plate 1 and side plates 2, 2 rotates integrally around the common axis X. 4 supports the shafts 3, 3, respectively.

The bearings 4, 4 are fixed to a fixed base 5. 6 is a drive device for rotating the above assembly.

Reference numeral 7 designates a wedge, which is slidably provided in a groove 9 of the auxiliary fixing base 8, and as the wedge moves forward, the inclined direction 10 formed at the tip of the wedge 7 connects with the lower end of the side plate 2 and the auxiliary fixing base 8.
It enters the gap formed between the upper surface of the side plate 2 and firmly fixes the side plate 2.

Therefore, the area around the side plate 20 has an inclined surface 10 as shown in the figure.
It is desirable to chamfer along the slope.

Reference numeral 11 denotes a guide rod for the wedge, and a movable slope 12 consisting of a protrusion is formed on the upper surface of the guide rod 11.
When moving back and forth along the groove 13 in the orthogonal direction, the sliding movement between the movable slope 12 and the inclined groove 14 of the wedge 7 fitted into the movable slope 12 causes the wedge 7 to move due to the partial pressure generated between the contact surfaces. Forcibly advance or retreat along the direction of operation.

As shown in FIG. 2, the two guide rods 11 are each formed with two moving slopes 12 that have the same inclination and act synchronously on each one of the guide rods.
As it moves, the pair of wedges 7, 7 that engage with it are forced to move forward and backward by the same distance in a synchronous manner.

15 is a spring for forcing the guide rod 11 to move in the direction of movement of the wedge I, and 16 is a cylinder for forcing the guide rod 11 to move in the opposite direction. be.

The operating force of the cylinder 16 is stronger than the repulsive force of the spring 150, and therefore, except when the working medium is injected into the cylinder 16, the guide rod 11 always pushes the wedge 7 in the advancing direction by the repulsive force of the spring 15. Demonstrate strength continuously.

This means that when vibration of the cutter, so-called chatter, occurs while processing a workpiece mounted on the bottom plate 1 with a cutter, the holding force of the workpiece is further increased in response to the occurrence of chatter. It works in the direction of strengthening the cylinder 16, and even if the injection of working medium into the cylinder 16 is interrupted due to some kind of accident during machining, it has a unique effect such that machining work can be continued stably regardless of the situation. Demonstrate.

When machining in a predetermined direction is completed and the workpiece is to be rotated, a working medium is injected into the cylinder 16 to move the guide rod 11 in the opposite direction against the spring 15.
As a result, each wedge 7 is moved in the direction of retreat by the partial pressure transmitted from the moving slope 12.

Thereafter, the drive device 6 rotates the combination of the bottom plate 1 and the side plate 2 by a predetermined angle together with the workpiece, and the lid...
The pressure of the working medium in the cylinder 16 is removed, and the repulsive force of the spring 150 causes the wedges 7 to advance all at once, thereby fixing the assembly at the position.

In this case, the rotation angle of the assembly is, for example, in 90° increments since the shape of the side plate 2 is a square in the illustrated example.

There are usually 90 types of directions required for the machined surface of the workpiece.
In most cases, the amount can be added in ° increments, but for example, 60
When required in ° increments or 45° increments, side plate 2
By forming the shape into a regular hexagon or a regular octagon, it can be easily realized with a configuration similar to the illustrated example.

Furthermore, in the configuration of the example shown above, the pair of cylinders 16, 1
The working medium supply paths of 6 are combined into one line and connected to a common working medium supply source, and a shutoff valve is provided in the middle of the single supply line to control opening and closing. Accordingly, each operation of fixing or opening the above-mentioned assembly can be performed extremely easily in one movement.

FIG. 4 shows a different embodiment. In this embodiment, cams 17, 17 are provided in place of the cylinders in the previous embodiment, and the two guide rods IL 11K are forcibly moved all at once by rotation of the camshaft 180. The other configurations, functions, and effects are the same as those of the previous embodiments.

FIG. 5 shows a further different embodiment, in which a guide rod is not used and a spring 19 is provided that acts directly along the forward direction of the wedge 7a, forcing the wedge 7a to retreat in the opposite direction. lever 20 and lever 2 for
An eccentric cam 21 for forcibly moving the wedge 7a is provided for each wedge 7a.

Two eccentric cams 21 are fixed on a common shaft 22 in the same phase, and by rotating the common shaft 22, the two wedges 7a, 7a (in the figure, they are overlapped front and back) are simultaneously driven. The eccentric cam 21 is moved backward against the spring 19, or
is separated from the lever 20 and the wedge 7ay 7a is connected to the spring 1.
9 causes them to move forward all at once.

Although not shown in the figure, synchronization between this and the other pair of wedges 7a, 7a arranged opposite to each other can be achieved by interposing an appropriate interlocking device between the two common shafts. This can be easily realized.

Since the horizontal index according to the present invention is constructed as described above, it is possible to achieve relative positions corresponding to a wide variety of angles with an extremely simple construction, and to ensure that these positions are held in a fixed state. I can do it.

Moreover, each operation of fixing for processing and releasing for rotation can be performed on the workpiece attached to the bottom plate in one movement.

Furthermore, when the blade chatter occurs when applying force, it immediately responds to this and works to further strengthen the holding force of the body being subjected to force.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of one embodiment, Fig. 2 is an explanatory plan view of the main parts, Fig. 3a is a side view of one embodiment of the wedge, and Fig. 3b is
is a bottom view thereof, FIG. 4 is an explanatory plan view of a main part in a different embodiment, and FIG. 5 is a sectional view of a main part in a further different embodiment. 1...Bottom plate, 2...Side plate, 3...
...shaft, 4...bearing, 5...fixing base,
6... Drive device, 7, 7a-... Wedge, 8
...Auxiliary fixing base, 9,'13... Groove, 10... Inclined surface, 11... Guide rod,
12...Moving slope, 14...Incline groove, 15.19...Spring, 16...Cylinder, 1γ...Cam, 18 ...Camshaft, 20...Lever, 21...Eccentric cam, 22...Common shaft.

Claims (1)

[Claims] 1. By fixing a pair of common polygonal side plates to both ends of a single bottom plate on which the workpiece is placed and fixed, so that they face each other in a symmetrical phase in a direction perpendicular to the bottom plate. The above-mentioned assembly constitutes an assembly and is disposed on a fixed base with axes extending along a common axis perpendicular to the side plates protruding from the outside of the valley side plate of the assembly, respectively, and the assembly is integrally mounted on the fixed base. Each of the shafts is supported by a pair of bearings provided on a fixed base so as to rotate around the above-mentioned shaft, and the shaft is formed between the lower surface of the pair of side plates and the upper surface of the fixed base in the assembly. A device is installed in a wedge groove on the top surface of the fixing base so that it can move forward and backward in the axial direction into each of the gaps, and is caused to advance toward or retreat from the gap through the means for advancing and retreating provided on the fixing base. A horizontal index comprising a wedge for preventing or releasing relative rotation of the assembly relative to the fixed base.