JPH0751223Y2 - Angle attachment indexing clamp device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to an index clamp device for an angle attachment in a machining center.

Conventional technology Conventionally, in a vertical machining center, when multi-face machining of the side surface of a workpiece is performed using an angle attachment,
Machining was done by adding a work indexing table or by using multiple angle attachments in which the phase of the positioning pin differs depending on the cutting direction.

The problem to be solved by the invention is to add the indexing table described in the prior art,
There is a problem that the maximum processing range becomes small at the same time as the machine becomes expensive.Therefore, the method of preparing a plurality of angle attachments increases the cost of the device and requires tool replacement time, which reduces the processing efficiency. Have

The present invention has been made in view of the above problems of the conventional technology. The purpose of the present invention is that the indexing clamp for multi-face machining of the angle attachment is simple and quick without requiring tool replacement. It is intended to provide a device that can

Means for Solving the Problems In order to achieve the above object, an indexing and clamping device for an angle attachment according to the present invention is provided at an end of a spindle head so as to be movable in the axial direction of the spindle. It comprises a positioning plate having a plurality of guides corresponding to the processing positions which are detachably engaged with the positioning pins of the attachment on the spindle concentric circles, and a means for moving the positioning plates.

Action Positioning plate is retracted to the headstock side to perform swivel indexing of the angle attachment, move the positioning plate forward to the angle attachment side, and engage the positioning pin guide of the angle attachment with the positioning plate guide to index. Clamp the angle attachment in position.

Example An example will be described with reference to FIGS. 1 and 2.

In a well-known vertical machining center, a spindle head 1 is movably mounted on a scraped sliding surface in the Z-axis direction on the front surface of a column fixed on a bed (not shown). Is moved and positioned by NC. A spindle 2 is rotatably supported by the spindle head 1, and an angle attachment 3 is detachably attached to a taper hole at the tip of the spindle 2 by an ATC (not shown). The angle attachment 3 is, for example, BT50-AG20 or BT50-AG32 manufactured by Daishowa Seiki Co., Ltd.
A shape or the like can be used, and this has a positioning pin 5 axially movable in the Z-axis direction on the attachment body 6, and the positioning pin 5 is always biased by the spring 4 in a projective manner. When the angle attachment is mounted on the main shaft 2, the positioning pin 5 is pressed against the positioning plate described later by the force of the spring 4 to fix the attachment body 6 at a predetermined angular position. In addition, positioning pin 5
The non-rotating metal fitting 7 is fixed to the non-rotating metal fitting 7.
The groove 7a at the tip engages with a claw 8 provided on a cylindrical portion 9 near the grip so as to be detachably engaged, and the positioning pin is projected when the angle attachment 3 is housed in a magazine or during ATC operation. The groove 7a engages with the claw 8 to prevent the attachment body from rotating.

Z on both sides of the lower end of the spindle head 1 symmetrically with respect to the spindle axis
The hydraulic cylinders 10A and 10B facing downward in the axial direction are fixed, the piston 12 integrated with the piston rod 11 is fitted into the hydraulic cylinders 10A and 10B, and the positioning plate 13 is fixed to the tip of the piston rod 12. . The positioning plate 13 is provided with guide holes 13a which are fitted into the positioning pin 5 in a tapered manner at regular intervals on the concentric circle of the main shaft.

The pressure oil supplied to the hydraulic cylinders 10A and 10B is configured so that the source pressure P is switched by the electromagnetic switching valve 14 and sent to the front chamber or the rear chamber, and the pressure oil is supplied to the rear chamber to cause the piston 1 to move.
2. When the piston rod 11 moves forward and the positioning plate 13 is pushed out toward the angle attachment 3 side, the tapered portion of the tip of the positioning pin 5 abuts the tapered hole of the guide hole 13a and resists the force of the spring 4. Then, the positioning pin is pushed down, and the attachment body 6 is positionally clamped by the spring force, and at the same time, the groove 7a is disengaged from the claw 8 to unlock the attachment body and the rotary shaft.

On the other hand, two large and small driven gears 17 and 18 and a position detecting matching disc 19 are fitted on the spindle 2, and a detector 20 for reading the sign is attached to the corresponding position of the spindle head 1. The spindle head 1 has a spindle motor 23 whose rotation is controlled by an NC device 22.
Is fixed, and the detector 24 is concentrically fixed to the spindle motor 23. A drive gear 25 is fitted to the output shaft of the spindle motor 23, and the drive gear 25 is meshed with an intermediate gear 27 fitted to a rotatable intermediate shaft 26 provided in the spindle head in parallel with the spindle. Two-stage gears 28 and 29 are integrally fitted to a spline portion (not shown) of the intermediate shaft 26 so as to be movable in the axial direction. Meshed together.

The NC unit 22 is equipped with a servo system for rotation and rotary indexing of the spindle 2 in addition to the X-axis, Y-axis, and Z-axis servo systems. The speed control unit 30 that outputs a signal to compare with the current speed of No. 1 and outputs a signal to achieve the specified number of revolutions is compared with the program specified angle and the current angular position of the spindle from the detector 20 to obtain the specified angle. A position control unit that outputs various signals, and a signal from the speed control unit 30 supplies electric power required for spindle rotation to the spindle motor 23, and a signal from the position control unit 31 supplies electric power for turning the spindle. It is composed of a spindle power amplifying section 32 supplied to 23.

Next, the operation of this embodiment will be described.

Now, the solenoid switching valve 14 is switched to the II position by energizing the solenoid SOL1, pressure oil is supplied to the front chambers of the hydraulic cylinders 10A and 10B, the piston 12 and the piston rod 11 retract, and the positioning plate 13 moves to the spindle head. Is receding to the side.

The angle attachment 3 is fitted into the spindle 2 by the ATC in response to the NC tool change command, and clamped by a tool pulling device (not shown) with a built-in spindle. Next, the spindle motor 23 is rotated by the NC spindle rotation command, and the gears 25, 27 and the gears 28, 17 are rotated.
The main shaft 2 is rotated at low speed via the. At this time, the current angular position of the spindle is sent from the detector 20 to the position control unit 31, and the spindle motor is stopped when the program-specified angle and the current angular position match in the position control unit. Next, the solenoid SOL1 is de-energized, the electromagnetic switching valve 14 is switched to the I position, pressure oil is supplied to the rear chambers of the hydraulic cylinders 10A, 10B, and at the same time, the front chamber is communicated with the tank T side. Then, the piston 12 and the piston rod 11 advance, the positioning plate 13 advances toward the angle attachment 3 side, the corresponding guide hole 13a contacts the positioning pin 5, and the positioning pin is pushed down against the force of the spring 4. , Spindle head 1 by spring force
Then, the attachment body 6 is clamped for positioning. At the same time, the groove 7a of the detent 7 and the claw 8 are disengaged, and the attachment spindle can rotate. Next, the two-stage gears 28, 29 are shifted, the gear 29 is meshed with the gear 18, the spindle motor 23 is rotated, the attachment spindle is rotated via the spindle 2, and the tool T mounted on the attachment spindle is rotated. Then, the side surface of the workpiece is machined.

The guide holes 13a of the positioning plate 13 do not have to be limited to those formed at equal intervals on the spindle concentric circle, and it is needless to say that the guide holes 13a can be formed at any angle according to the angle of the side surface machining point of the workpiece. Is.

Effect of the Invention Since the present invention is configured as described above, it has the following effects.

The positioning pin of the angle attachment is provided with a positioning plate having a plurality of guide holes that are detachably engaged so that it can move in the Z-axis direction on the spindle head, and the positioning plate moves to engage the positioning hole with the positioning pin. Remove
The rotary attachment of the angle attachment is indexed by the rotary indexing of the main shaft, and the guide hole and positioning pin are engaged to perform the indexing clamp of the angle attachment. The attachment makes it possible to easily and quickly handle multi-face machining.

[Brief description of drawings]

FIG. 1 is an explanatory view of an indexing and clamping device for an angle attachment according to the present embodiment, and FIG. 2 is a view mainly showing a front surface of a positioning plate taken along the line AA of FIG. 1 …… Spindle head 2 …… Spindle 3 …… Angle attachment 5 …… Positioning pin 13 …… Positioning plate 13a …… Guide hole

Claims (1)

[Scope of utility model registration request] 1. A spindle (2) capable of turning and indexing at an arbitrary angle.
In a machining center having a head, a spindle head (1) is detachably engaged with a positioning pin (5) of an angle attachment (3) mounted on the spindle, the movably provided in the axial direction of the spindle (2). An index attachment indexing clamp device for an angle attachment, comprising: a positioning plate (13) having a plurality of guides (13a) corresponding to the processing positions on a spindle concentric circle; and means for moving the positioning plate.