JP3488604B2 - Turret turret equipment for machine tools - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turret tool post device for a machine tool.

[0002]

2. Description of the Related Art Conventionally, as a device of this kind, a turret is provided on a tool rest body so as to be rotatable about an axis parallel to the main axis.
A technique is known in which a plurality of tool holders are radially attached to a turret, the turret is swiveled to index a required tool holder to a processing position, and the workpiece held by the tool held by the holder is machined.

[0003]

However, according to the conventional turret tool post device, in order to increase the number of tools, in order to prevent the cutting edge of the tool adjacent to the tool at the machining position from interfering with the workpiece, It was necessary to design the turning diameter of the tool blade to be large by increasing the outer diameter or using a long tool holder. Therefore, there is a problem that the entire apparatus becomes large and the indexing time becomes long accordingly.

Therefore, an object of the present invention is to provide a turret tool post device which can mount a large number of tool holders on a turret having a relatively small diameter without any hindrance, which makes the entire device compact and shortens the indexing time. Especially.

[0005]

In order to solve the above problems, a turret tool post device of the present invention comprises a tool post body and
A turret that is rotatably provided on the turret body, a plurality of tool holders that are movably supported in the radial direction of the turret, a turret drive means that swivels the turret to index the required tool holder to a machining position, and machining Sometimes clutch
And a clamp plate that non-rotatably clamps the turret to the turret body, and a cam plate fixed to the turret body ,
As the turret rotates, move the tool holder at the machining position to the cam plate.
Cam means for projecting outward in the radial direction of the turret with a lift portion provided at one place and the cam holder for engaging with the tool holder at the machining position
And holding means for holding the holder in the protruding position.
(Claim 1). Further, the turret tool post device of the present invention,
The clutch plate that clamps and disengages the clutch
And a member for interlocking the holding means with the clutch plate .

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is applied to a turret tool post device for a lathe will be described below with reference to the drawings. As shown in FIG. 1, a rotary shaft 3 is supported by a tool rest main body 1 via bearings 2 in parallel with a main shaft axis, and a turret 4 is connected to a front end of the rotary shaft 3 by bolts 5. A large number of support holes 6 are radially formed in the turret 4, and a shank portion 8a of a tool holder 8 for holding a tool 7 is slidably supported in the support holes 6 in the radial direction of the turret 4.

A ring gear 9 is fixed to the rear end surface of the turret 4 with bolts 10, and a motor 11 as a turret driving means is installed in the tool rest main body 1. Motor 1
A pinion 12 meshing with a ring gear 9 is fixed to the output shaft 11a of No. 1 and a turret 4 is swung by a motor 11 to index a required tool holder 8 to a machining position P of a lathe.

A cylinder chamber 14 is formed in the tool rest body 1, and a piston 15 is housed in the cylinder chamber 14 so as to be slidable back and forth. A clutch plate 16 is fixed to the front end of the piston 15 with a bolt 17, and a clutch 18 is interposed between the clutch plate 16 and the tool rest body 1 and the ring gear 9. A rod 19 is provided on the outer peripheral portion of the clutch plate 16.
Is projecting forward, and the piston 15 and the clutch plate 16 are connected to the turret 4 via a rod 19 so as to be integrally rotatable and slidable forward and backward.

Then, the piston 15 and the clutch plate 16
Clamping means for the turret 4 is constituted by the clutch 18 and the clutch. At the time of processing, the piston 15 is retracted by the pressure oil from the hydraulic pipe 20, the clutch 18 is engaged (see FIG. 3), and the turret 4 is clamped to the tool rest body 1 in a non-rotatable manner. When indexing the tool, the piston 15
Is advanced, the clutch 18 is disengaged (see FIG. 4),
The turret 4 is unclamped so as to be rotatable with respect to the tool rest body 1.

A cam plate 22 is arranged between the turret 4 and the clutch plate 16, and the tool rest body 1 is fixed by a bolt 23.
It is fixed to the front end of. As shown in FIG. 2, the cam plate 2
An annular cam groove 24 is formed on the front surface of 2, and a lift portion 24a is provided at one location corresponding to the processing position P thereof. The shank portion 8a of the tool holder 8 is provided with a pin 25 protruding from the shank portion 8a, and the pin 25 and the cam groove 24 constitute a cam means. Then, as the turret 4 turns, the tool holder 8 at the processing position P projects radially outward of the turret 4 in accordance with the cam shape of the lift portion 24a.

On the other hand, as shown in FIGS. 3 and 4, a serration piece 27 is fixed to the front end portion of the rod 19 so as to face the shank portion 8a of the tool holder 8 from the front, and the serration piece is attached to the shank portion 8a. A serration 28 that meshes with 27 is formed. The turret 4 has a disc spring 29 for urging the serration piece 27 toward the shank portion 8a.
And a pressure adjusting screw 30 for adjusting the spring pressure thereof.

The rod 19 is a serration piece 27.
Of the tool holder 8 and the serration piece 27 and the disc spring 29.
Of the serration 28 of the shank portion 8a when the turret 4 is clamped.
To hold the tool holder 8 at the radially projecting position. Further, when the turret 4 is in the unclamped state, the serration piece 27 is disengaged from the serration 28 to allow the tool holder 8 to move in the radial direction.

In the turret tool post device constructed as described above, when a tool indexing command is output from the lathe control device, the piston 15 and the clutch plate 16 move forward, the clutch 18 disengages, and the turret 4 moves. At the same time as being unclamped from the tool rest main body 1, the serration piece 27 advances to release the tool holder 8. Then, the motor 11 is activated, the turret 4 is rotated, and the tool holder 8 is moved to the processing position P.
At the turret 4 by the lift portion 24a of the cam groove 24
Project radially outward.

When the required tool holder 8 is indexed to the machining position P, the motor 11 is stopped, the piston 15 is retracted, the clutch 18 is engaged, and the turret 4 is attached to the tool rest body 1.
At the same time, the serration piece 27 retracts and holds the tool holder 8 at the protruding position. In this state, as shown in FIG. 2, since the cutting edge of the tool 7 at the processing position P is located outside the turning diameter of the cutting edge of the other tool 7, the large-diameter workpiece W is adjacent to the adjacent tool 7. It can be processed without interference. Therefore, a large number of tool holders 8 can be attached to the turret 4 having a relatively small diameter without any hindrance, the entire apparatus can be made compact, and the indexing time can be shortened.

The present invention is not limited to the above-mentioned embodiment, and the shape and configuration of each part can be appropriately modified and embodied without departing from the spirit of the present invention.

[0016]

As described in detail above, according to the turret tool post device of the present invention, since the tool holder at the machining position is projected outward in the radial direction of the turret, a large number of tool holders are provided in the turret having a relatively small diameter. It can be installed without any hindrance, the whole device can be made compact, and the indexing time can be shortened.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a turret tool post device showing an embodiment of the present invention.

FIG. 2 is a left side view of FIG. 1 showing an arrangement form of tool holders of the device.

FIG. 3 is an enlarged view of a main part of FIG. 1 showing a tool holder holding mechanism of the same device in a turret clamped state.

FIG. 4 is an enlarged view of a main part of FIG. 1, showing the holding mechanism in an unclamped state of a turret.

[Explanation of symbols]

1 ... Turret body 3, ... Rotation axis, 4 ... Turret, 6
..Support holes, 7 ... Tools, 8 ... Tool holders, 11 ...
Motor, 14 ・ ・ Cylinder chamber, 15 ・ ・ Piston, 16
..Clutch plates, 18 ..., Clutch, 19 ...
22 ... Cam plate, 24 ... Cam groove, 27 ... Serration piece, 29 ... Disc spring, P ... Machining position, W ...

Claims (2)

(57) [Claims] 1. A turret body, a turret pivotably provided on the turret body, a plurality of tool holders supported so as to be movable in the radial direction of the turret, and a turret pivoted to provide a required tool holder. Turret drive means for indexing to the machining position and a clutch for machining to connect the turret to the turret body
And clamping means for pivoting incapable clamp, tool rest main body
It comprises a fixed cam plate, the cam means projecting the toolholder processing position with the turning of the turret radially outside the <br/> turret lift portion provided in one place of the cam plate, machining position
Turret tool rest device of a machine tool, which comprises a holding means for engaging with a tool holder of a stationary unit and holding the holder at a protruding position. 2. The clamp means engages and disengages the clutch.
The turret tool post device for a machine tool according to claim 1 , further comprising a member that includes a clutch plate that is separated, and that interlocks the holding means with the clutch plate .