JP2539056Y2 - Cross groove processing equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming a cross groove on an end face of a work such as a shaft or a bar.

[0002]

2. Description of the Related Art Conventionally, this type of cross-grooving is performed by using a machining apparatus with an NC such as a machining center, and after processing one groove, the work is rotated by a groove crossing angle (for example, 90 degrees). Then, the second groove processing is performed.

For this reason, a machining unit for performing groove machining by cutting or grinding must be operated for two cycles.
The machining cycle time per workpiece is long, and the use of an expensive machining center equipped with a work rotating mechanism and its control unit also increases the equipment cost.

[0004]

[Problem to be Solved by the Invention] This invention solves the above-mentioned conventional problems, and has a simple structure, low equipment cost, and a cross which can efficiently perform cross groove machining with a short machining cycle time. It is intended to provide a groove processing device.

[0005]

According to the present invention, there is provided a cross groove machining apparatus comprising: an index table for intermittently driving a table at a predetermined index angle; and an index table for each index angle on the table. A plurality of workpiece holders provided in the above, a workpiece held by the workpiece holder and stopped at a first indexing position, and a predetermined groove intersection angle rotated from the first indexing position. A machining unit for grooving each end face of the work stopped at the second indexing position in the same direction.

[0006]

In the device according to the present invention, the workpiece, which is the workpiece, is held by the workpiece holder, and is intermittently driven to rotate together with the table at a predetermined indexing angle. During this movement, the machining unit is moved to the work stopped at the first indexing position and the end faces of the work stopped at the second indexing position rotated by the groove intersection angle from this position. Performs groove processing in the same direction. As a result, a groove formed by the first indexing position and a groove processed by the second indexing position are formed in the work.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the drawing, reference numeral 1 denotes an index table, 2 denotes a driving unit thereof, and a disk-shaped table 3 is provided with an index angle of 90.
It is driven intermittently in degrees. Reference numeral 4 denotes a work holder comprising a collectable chuck mounted on the table 3, and 9 on a pitch circle 5 centered on the rotation center O of the table 3.
Four are provided every 0 degrees.

As shown in FIG. 3, each of the workpiece holders 4 is intermittently arranged with respect to a position (indexing position) A for receiving a workpiece 6 as a workpiece. Positions B and C at which the workpiece is rotated by 90 degrees in the direction of arrow R by a rotational drive to perform the groove processing of the work by the processing unit 20 described later.
After the processed work is discharged at the position D through the step D, the work returns to the position A and the next work is supplied.

As shown in FIG. 1, the work holder 4 has a sleeve 12 fixed to the table 3 and a collet 12 for gripping the work 6 fitted therein. The upper end of the pull-in shaft 14 to be urged is connected to the collet 12 by screwing. Immediately below the work holder 4 at the positions A and D (see FIG. 3) where the work 6 is attached and detached, an air cylinder 15 that pushes up the retraction shaft 14 to open the collet 12 is provided. A push-up plate 16 fixed to the piston rod is placed on the foundation so as to face the lower end surface of the retracting shaft 14.

Reference numeral 20 denotes a processing unit, which is mounted on a traversing table 23 which is reciprocated in the X-axis direction by a driving device 22 along a guide 21 extending in the X-axis direction (horizontal direction). An extended guide 24 is provided, and a grinding head 26 is attached to a carrier 25 that is reciprocated in the Z-axis direction by a drive (not shown) along the guide 24.

The grinding head 26 includes a grinding wheel 27 which is a tool for grooving, and a driving device 2 which rotates the grinding wheel 27.
8 The X-axis direction corresponds to position B and position C.
Is set so as to be parallel to a center line 29 connecting the centers of the workpieces 6.
The position of the grinding wheel 27 is determined so as to move in the axial direction.

Next, the operation of the cross groove machining apparatus 30 having the above-described structure will be described mainly with reference to FIG. 3. A short hollow shaft-shaped work 6 supplied from a work supply unit such as an industrial robot (not shown) is positioned. A, the workpiece is held by the stopped work holder 4, and the index table 1 is driven to drive the table.
The cable 3 is rotated in the direction of the arrow R by an index angle of 90 degrees, and the work 6 is stopped at the position B. Note that the wire at the position A
The supply of the table 6 is performed every index rotation of the table 3.

Next, the processing unit 20 is started, and the grinding wheel 2 is turned on.
After moving down in the direction of arrow S as shown in FIG. 1, the groove 7 grinds the groove 31 on the end face of the work 6 at the position B. After this processing, the table 3 is further rotated by 90 degrees in the direction of arrow R, and the processing unit 20 is operated in the same manner as described above to grind the groove 32 on the work 6 at the position C.

A groove 31 has already been formed in the work 6 at the position C in the previous step, and the groove 31 faces a direction rotated by 90 degrees equal to the index angle of the table 3. Therefore, the groove intersection angle θ between the two grooves 31 and 32 is 90 degrees, and a desired cross groove is formed. At this time, another subsequent work 6 is gripped by the work holder 4 at the position B, and this work is provided with a groove 3 by a grinding wheel 27.
1 processing is performed simultaneously. That is, the groove processing is performed on the two works 6 by the grinding operation of the processing unit 20 in one cycle.

The work 6 after the cross groove processing reaches the position D by the next indexing rotation of the table 3, and the air cylinder 1
The workpiece 5 is released from gripping by the work holder 4, and is discharged to the outside of the apparatus by a discharge unit (not shown) including an industrial robot or the like. The empty work holder 4 reaches the position A by the next indexing rotation of the table 3, receives the supply of a new work 6, and repeats the same process thereafter to cross the work. Grooving is performed continuously.

The present invention is not limited to the above embodiment. For example, the work holder 4 may be of a type other than a collective chuck, and the processing unit 20 may be a milling cutter. Processing other than grinding may be performed. Also, the index table 1 may be one having an index angle of 45 degrees. In this case, the work reaching the position after the rotation of the index angle twice from the position B and the work at the position B are performed. For this, the groove processing by the processing unit 20 may be performed.

In the above embodiment, one grinding head 2
6, the workpieces at the positions B and C were grooved, but two grinding heads 26 were provided, and the positions B and C were formed.
When the grooves are formed in parallel with the respective grinding heads 26, the processing cycle time can be further reduced.

In the above embodiment, the case where the groove intersection angle θ is 90 degrees has been described. However, if an index table having an index angle of 60 degrees is used, a cross groove with a groove intersection angle θ of 60 degrees can be formed. Can be. In this case, it is also possible to obtain a product having three grooves intersecting at 60 degrees by additionally providing a grinding head and adding a groove processing at the index stop position next to the position C.

[0019]

[Effect of the invention] As described above, according to the invention,
The cross-groove processing can be performed by a device having a simple configuration including an index table having a holding tool for holding a work and a processing unit for performing a groove processing in a predetermined direction, and the equipment cost is low.

Further, since two grooves stopped at the first indexing position and the second indexing position can be processed by one cycle operation of the processing unit, two grooves can be formed. -The machining cycle time per piece is short, and the productivity is high.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a cross-grooving apparatus showing one embodiment of the present invention.

FIG. 2 is a plan view of the apparatus of FIG.

FIG. 3 is a plan view of a main part showing a use state of the apparatus of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Index table 3 Table 4 Work holder 5 Pitch circle 6 Work 20 Processing unit 25 Carrier 26 Grinding head 27 Grinding wheel 30 Cross groove processing device 31 Groove 32 Groove

Claims (1)

(57) [Scope of request for utility model registration] An index table for intermittently driving a table at a predetermined index angle; a plurality of workpiece holders provided on the table for each of the index angles; Each end face of the workpiece held by the workpiece holder and stopped at the first indexing position and the workpiece stopped at the second indexing position rotated by a predetermined groove intersection angle from the first indexing position. And a processing unit for processing grooves in the same direction.