JP3672995B2 - Tool indexing device for machine tools - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
According to the present invention, a movable side coupling that rotates together with a tool mounting member that is rotatably supported on a tool table is rotated to a predetermined angular position, and meshed with a fixed side coupling that is detachably mounted on the tool table. The present invention relates to a tool indexing device for a machine tool that performs indexing and positioning of tools.
[0002]
[Prior art]
Conventionally, when fine adjustment (so-called centering adjustment) of the indexing position of a tool of a machine tool is performed with a fixed side coupling, all the parts positioned on the front side of the fixed side coupling are disassembled.
For this reason, for example, when performing centering adjustment of a tool post (tool base) of a lathe, it is necessary to disassemble the turret head, and after the centering adjustment work is completed, a taper pin for fixing is applied. There was a need.
[0003]
[Problems to be solved by the invention]
As described above, since it is necessary to disassemble the turret head, there is a problem that the number of work steps is increased, time is required, and the time required for this work is also increased.
Further, since it is necessary to hit a taper pin, there are problems that the number of parts is increased, the structure is complicated, the number of work steps is increased, labor is required, and the work time is further increased.
Moreover, in order to hit the taper pin, it is necessary to process a taper hole for hitting the taper pin. Therefore, when the taper pin hits the tape, the chip generated is discharged to the outside and the assembly environment is deteriorated. There was a problem that.
[0004]
The present invention has been made in view of the above-described conventional problems, and when performing a fine adjustment operation of the indexing position of the tool, there is almost no need to disassemble the tool base, and there is no need to drive a taper pin. An object of the present invention is to provide a tool indexing device for a machine tool that eliminates the need for machining, eliminates the generation of chips, and can easily adjust the centering of the tool table in a short time, and can simplify the structure. It is said.
[0005]
[Means for Solving the Problems]
The present invention has been made to achieve the above object, and the invention of claim 1 is directed to a fixed side coupling that is detachably attached to a tool table, and a tool that is rotatably supported by the tool table. Tool indexing of a machine tool comprising a movable side coupling that rotates together with the mounting member, and indexing and positioning of the tool by rotating the movable side coupling to a predetermined angular position and meshing with the fixed side coupling In the apparatus, the fixed side coupling is supported by the tool table so as to be rotatable about the rotation axis of the movable side coupling in a state where the fixing to the tool table is released, and the fixed side coupling, the tool table, In the meantime, fine adjustment means for rotating the fixed side coupling around the rotation axis by a minute angle is provided.
[0006]
According to a second aspect of the present invention, in the tool indexing device for a machine tool according to the first aspect, the fine adjustment means projects the drive shaft eccentrically on the tip surface of the support shaft that is rotatably supported by the tool table. And a locking hole that is recessed in the end surface of the fixed side coupling and that is inserted and locked by the drive shaft, and is driven by rotating the support shaft. The shaft is characterized in that the fixed side coupling is rotated by a minute angle through the locking hole.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a lathe equipped with a tool indexing device for a machine tool according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing the internal structure of the tool indexing device that is a main part of the lathe of FIG. FIG. 4 is an enlarged cross-sectional view showing the main part of the tool indexing device, and FIG. 4 is an exploded perspective view of the main part of the coupling and fine adjustment means on the fixed side of the tool indexing device.
[0008]
In the lathe 1 shown in FIG. 1, a tailstock 3 is arranged on one side of a bed 2 so as to be movable left and right, a headstock 4 is arranged on the other side, and a tool table 5 is movable on the rear side. And it is arranged to be movable back and forth. The headstock 4 is provided with a chuck 6 for holding a workpiece (workpiece) at the tip thereof, and the tailstock 3 is provided with a center 7 for holding the workpiece to be held with the chuck 6. ing.
[0009]
The tool base 5 is provided with a turret head 8 of a tool indexing device 10 at its tip, and this turret head 8 is supported by a turret shaft 8c provided on the tool base 5 so as to be rotatable around the indexing axis. ing. A tool K is detachably attached to the turret head 8.
[0010]
The tool indexing device 10 of this embodiment rotates the indexing gear 15 by a drive mechanism (not shown) to position the turret head 8 with respect to the tool base 5 at the predetermined machining position of the cutting edge of any of the above tools K. The rotation angle position is set as described above.
[0011]
An outer peripheral movable side coupling 17A is fixed to the front side (turret head 8 side) of the indexing gear 15 with a taper pin 15a and a bolt 15b. A fixed side coupling 16 is coaxially arranged on the axial center side of the outer peripheral movable side coupling 17 </ b> A, and a facing movable side coupling 17 </ b> B is arranged so as to face the fixed side coupling 16. During normal processing, the gear portion 16a formed on the end surface of the fixed side coupling 16 and the gear portion 17a formed on the end surface of the outer peripheral movable side coupling 17A are formed on the end surface of the facing movable side coupling 17B. The portion 17b is engaged. The outer peripheral movable side coupling 17A is fixed to the tread head 8 with a taper pin 8a and a bolt (not shown), whereby the indexing gear 15, the outer peripheral movable side coupling 17A and the turret head 8 rotate simultaneously. .
[0012]
The facing movable side coupling 17B functions as a piston slidably disposed in the cylinder 8b formed inside the turret head 8 so as to be slidable left and right in the figure, and the facing movable side coupling 17B. Is supplied with hydraulic pressure from a hydraulic pressure supply hole 19 formed on the inner side of the turret head 8 so that the gear portion 17b meshes with the gear portions 17a and 16a and supplies hydraulic pressure from the hydraulic pressure supply hole 18. As a result, it is configured to move to the left in the figure and disengage between the gear portions 17b and 17a, 16a. In FIG. 2, the upper part of the turret shaft 8c shows a disengaged state, and the lower part shows a engaged state.
[0013]
The fixed side coupling 16 is supported by a boss 5d of the tool base 5 so as to be rotatable and coaxial with the turret head 8, and as shown in FIG. A plurality of screw holes 16c are formed, and are fixed to the tool table 5 by screwing fixing bolts into the screw holes 16c.
[0014]
In the present embodiment, fine adjustment means 20 for rotating the fixed side coupling 16 by a small angle about the same axis as the outer peripheral movable side coupling 17A in a state in which the fixed side coupling 16 is released from the tool base 5 is provided. 16 and the tool table 5.
[0015]
As shown in FIGS. 2 to 4, the fine adjustment means 20 projects the drive shaft 21 b eccentrically by a dimension a on the tip surface of the support shaft 21 a rotatably supported by the support hole 5 a of the tool base 5. The eccentric pin 21 is provided, and a locking hole 16b that is recessed in the end surface of the stationary coupling 16 on the tool stand 5 side and into which the drive shaft 21b is inserted and locked. The eccentric pin 21 is provided with a screw hole 21d into which the fixing bolt 22 is screwed and a rotating tool such as a hexagon wrench R (see FIG. 2) for rotating the eccentric pin 21 for fine adjustment. A hexagon hole 21e to be inserted is formed. The locking hole 16b is a long hole having a long axis in the radial direction.
[0016]
On the base side of the support hole 5a of the tool base 5 into which the support shaft 21a of the eccentric pin 21 is rotatably inserted, a tool hole 5b for penetrating a turning tool such as a hexagon wrench R communicates with the support hole 5a. An inward flange 5c is formed at the boundary between the support hole 5a and the tool hole 5b so that the washer 23 for the fixing bolt 22 abuts. The tool hole 5b is closed with a lid member 24. It is peeling off.
[0017]
Next, fine adjustment of the tool index position of the machine tool according to the present embodiment will be described.
In order to perform fine adjustment by rotating the fixed side coupling 16 around the turret head rotation axis by a small angle, the facing movable side coupling 17B meshes with the fixed side coupling 16 and the outer peripheral movable side coupling 17A ( 3), a plurality of fixing bolts (not shown) of the fixed side coupling 16 are loosened, and the fixing bolts 22 of the eccentric pin 21 are removed. Then, a hexagon wrench R is inserted into the hexagon hole 21e of the eccentric pin 21 and turned. As a result, the tread head 8 is rotated by a small angle together with the outer peripheral movable side coupling 17A, and the cutting edge of the tool K is centered and adjusted to a predetermined processing position. After the adjustment, tighten the fixing bolt.
[0018]
A normal indexing operation is performed as follows. First, by supplying the hydraulic pressure from the hydraulic pressure supply hole 18, the facing movable side coupling 17 </ b> B moves to the left and the meshing with the fixed side coupling 16 is separated. Subsequently, the index gear 15 is rotated by the drive source, whereby the turret head 8 is rotated to the index position.
[0019]
Next, by stopping the hydraulic pressure supply from the hydraulic pressure supply hole 18 and supplying the hydraulic pressure to the hydraulic pressure supply hole 19, the facing movable side coupling 17B moves to the right and the fixed side coupling 16 and the outer peripheral movable side coupling 17A As a result, the tool K is indexed and fixed at a predetermined position.
[0020]
In the above-described embodiment, the movable side coupling has been described as being composed of the facing movable side coupling 17B and the outer peripheral movable side coupling 17A. However, the present invention is not limited to this, and the movable side cup is not limited thereto. Of course, the present invention can be applied to the case where only one ring is provided without using two rings.
[0021]
【The invention's effect】
As described above, according to the tool indexing device for a machine tool of the first aspect, since the fixed side coupling is rotated by the fine adjustment means to finely adjust the indexing positioning of the tool. When working, there is no need to remove the tread head, and there is no need to drive in the taper pin, so there is no need for taper hole machining, chip generation, and easy centering adjustment work in a short time. There is an effect that can.
[0022]
According to the tool indexing device for a machine tool according to claim 2, the fine adjustment means includes a support shaft that is rotatably supported by the tool table, and a drive shaft that is eccentrically projected from the tip surface of the support shaft. Since the eccentric pin is provided with a locking hole that is recessed in the end surface on the tool base of the fixed side coupling and the driving shaft is inserted and locked, the structure is simple, Since the adjustment operation can be performed simply by rotating the support shaft of the eccentric pin with a rotating tool such as a hexagon wrench, the fine adjustment work is simple and the tool index can be finely adjusted accurately. .
[Brief description of the drawings]
FIG. 1 is a perspective view of a lathe equipped with a tool indexing device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the internal structure of the tool indexing device of the embodiment.
FIG. 3 is an enlarged cross-sectional view of a main part of the apparatus according to the embodiment.
FIG. 4 is an explanatory diagram of a state in which fine adjustment of the device of the embodiment is performed.
[Explanation of symbols]
K Tool 5 Tool stand 8 Turret head (tool mounting member)
DESCRIPTION OF SYMBOLS 10 Tool indexing device 16 Fixed side coupling 17A, 17B Outer periphery, facing movable side coupling 20 Fine adjustment means 21 Eccentric pin 21a Support shaft 21b Drive shaft 16b Locking hole

Claims (2)

A fixed-side coupling that is detachably attached to the tool table and a movable-side coupling that rotates together with a tool mounting member that is rotatably supported by the tool table. The movable-side coupling is rotated to a predetermined angular position. In a tool indexing device for a machine tool that performs indexing of the tool by engaging with the fixed-side coupling, the movable coupling can be operated in a state where the fixed-side coupling is released from being fixed to the tool table. A fine adjustment means for supporting the side coupling so as to be rotatable about the rotation axis and rotating the fixed side coupling about the rotation axis by a minute angle is provided between the fixed side coupling and the tool base. A tool indexing device for machine tools characterized by the above. 2. The eccentric pin formed by projecting a drive shaft eccentrically on a tip surface of a support shaft rotatably supported by a tool table, and the tool table of the fixed side coupling according to claim 1 It is made up of a locking hole that is recessed in the side end surface, and the driving shaft is inserted and locked. By rotating the support shaft, the driving shaft makes a small amount of the fixed coupling via the locking hole. A tool indexing device for a machine tool, characterized by rotating at an angle.

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