JPH07100242B2 - Automatic head change machine tool with magazine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a machine head for automatic head change machine with a magazine, which saves space and speeds up head change, which is necessary when incorporating the machine into a transfer machine or a dedicated machine. is there.

(Prior art and problems) Automatic head replacement with a conventional magazine machine tool, for example, automatic head replacement with a magazine that has a mechanism to deliver to a head magazine from a head changing device by simply tilting the multi-axis head 90 ° An example of a drive head mounting surface of a head related to a machine tool will be described. Figure 1
When the shape of the head clamper is set within the range (///) where it does not interfere with the spindle drive coupling at the center of the head as shown in, the head clamper trajectory with respect to the head replacement device rotation center and the head magazine rotation center Out of range of head clamper trajectory In addition, it is necessary to keep the positioning member and the pad to a minimum, which is a big limitation for mounting each device.

In order to prevent the multi-axis head from rotating, as shown in Fig. 1,
The head exchanging device clamp portion K1 and the magazine device clamp portion K2 are separately installed at opposite positions, which also causes a large turning radius.

As a result, when the head mounting area is considered to be the same, the turning speed is suppressed due to an increase in the machine width and an increase in the moment of inertia, which leads to an increase in the head replacement cycle time.

(Means for Solving Problems) The present invention has been made in view of the above problems, and the delivery from the head exchanging device to the head magazine is performed with the multi-axis head in a state in which the multi-axis head is securely gripped. By using a single actuator to perform a 90 ° tilt and 180 ° rotation mechanism, the head replacement cycle can be shortened and the back side of the head can be used effectively. By rotating the 180 ° head on its own axis, the center of rotation of the head exchanging device and the center of revolution of the head magazine are on the same side with respect to the center of the head, and the trajectory of the head clamper due to the revolving of the head exchanging device and head magazine occupies The area could be reduced. For this reason, a positioning wedge, a clamp member, a pad, a spindle drive coupling, an air and coolant supply coupling, a head type determining pin, a tap command shaft, and the like can be provided on the back surface of the head.

As a result, a large multi-axis spindle installation area can be secured, the turning radius can be kept small, and the head replacement cycle time can be shortened.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 shows a side view of the automatic head-changing machine tool with magazine.

Reference numeral 1 denotes a bed, and 2 denotes a feeding unit installed on the bed so as to be horizontally slidable.

3 is a drive head mounted on this feeding unit 4
Is a head clamper provided on the front surface of the drive head. The head clamper is detachably connected to the clamp member 5 provided on the back surface of the head H1.

The head H1 is also connected to the spindle drive coupling, the air and coolant supply coupling, and the like by being connected to the drive head 3 to complete the preparation for processing the work W.

In the drive head which has been prepared for processing, each spindle on the front surface of the multi-axis head is rotated by the rotation of the spindle drive motor 6, and the work W is subjected to predetermined processing by advancing the feed unit.

The processed multi-axis head retreats to the head exchange position G and operates the head clamper 4, thereby releasing the multi-axis head H1 from the grip of the drive head 3 and a clamper built in the head exchange device A ( (Not shown), the multi-axis head H1 and the multi-axis head H2 to be attached to the drive head next are gripped.

3 and 4 are drawings showing the swivel drive portion of the head changer. This head exchanging device is an embodiment of the device of the invention No. 62-68704, and the head exchanging device holding the multi-axis heads H1 and H2 has a mechanism capable of 180 ° turning with the acceleration curve of the cycloid curve. .

That is, by operating the rack gear 12 by hydraulic drive, the input arm 14 converted into the rotational movement by the pinion 13 swings 180 ° by the rack and the pinion. The planetary gear 15 attached to the input arm is set to have a gear ratio such that the planetary gear 15 revolves around the fixed sun gear 16 by 180 ° and rotates by one rotation.

Since the planetary gear is fixed to the eccentric shaft 17, the pin at the tip of the eccentric shaft has a radius of eccentricity, and draws a path that makes one rotation while revolving 180 ° around the sun gear. Bifurcated arm
18 makes a motion to draw the acceleration curve of the cycloid curve. Using this eccentric shaft as the drive source, and the head replacement shaft 19 fixed to the arm 18 as the turning center, the multi-axis heads H1, H2
Will be exchanged.

Next, a head tilting device B according to the present invention will be described with reference to FIGS.

In the multi-axis head that pivots to the standby position F, the head clamp member 5 and the head clamper 20 of the tilting device mesh with each other with a slight gap.

Then the head changer clamp is released and the cylinder
The movable bar 22 is advanced by 21 and the locate pin 24 guided by the fixed plate 23 attached to this movable bar enters the bush 25 of the head, is positioned, and further advances, and the flange end surface 24a of the pin and the end surface of the bush are advanced. 25a contacts and the head is clamped. The fixed plate 23 is attached to the swivel shaft 26, the movable bevel gear 27 is fixed to the shaft end of the swivel shaft, and meshes with the fixed bevel gear 28. The gear ratio between the movable bevel gear and the fixed gear is 1: 2. That is, the operation of the tilting cylinder 7 causes the multi-axis head to tilt 90 °, and the movable bevel gear that meshes with the fixed bevel gear rotates 180 ° by the gear ratio described above.

The face plate 30 attached to the housing 29 has a notch 30a that fits with the locate pin 24, and when the head is clamped, the locate pin is disengaged from the notch of the face plate so that it can freely rotate.

Also, while tilting, the end 24b of the locate pin is face plate 30.
A small gap is maintained, and even if the hydraulic pressure drops due to an emergency stop or the like, the locate pin can retract only by a small gap, thereby preventing the risk of the multi-axis head falling. In this way the head is tilted 90 ° and 180
゜ Rotate to the standby position E.

When the multi-axis head in the standby position E is tilted to the standby position F, the reverse operation is performed according to the above description.

Further, the multi-axis head that has come to the standby position E transfers with the magazine in the following operation sequence.

That is, the multi-axis head that has come to the standby position E is released by the operation of the clamping cylinder 21, and at the same time, is clamped by the magazine side clamping device and delivered.

The magazine side clamp device has a guide bar 31 which is constantly subjected to a force on the rising side by a spring, and a locate pin 33 which is fitted to a head via a plate 32 is attached below the guide bar.

The upper part of the guide bar is connected by a block 34, and the block 34 is provided with a clamper 36 which is swingable about a pivot 35 as a fulcrum.

Further, the upper portion of the block 34 is a U-shaped groove 34a, and a pusher 37 attached to the tip of the magazine clamping cylinder 11 is arranged with a gap in this groove. .

The magazine side clamping device, which is waiting in the unclamped state, moves the pusher 37 upwards by the operation of the magazine clamping cylinder 11 and the clamper 36 lowers, and at the same time the locate pin 33 rises and the head is clamped to the magazine side. It

In this state, the block 34 becomes rotatable with respect to the pusher 37, and the head position based on a new call command can be calculated. The magazine device C is rotated by the magazine drive motor 10 via the ring gear 8 and the pinion 9 to index the multi-axis head for the next process.
The magazine device C has a plate only at the head delivery position.
A hole 39 into which the pin 38 attached to 32 is fitted is provided so that the multi-axis head cannot be unclamped except during the magazine rotation and the head delivery position. The operation of the tilting device and the selection and indexing operation of the multi-axis head in the magazine device described above are performed during the machining operation of the drive head to shorten the head replacement cycle time.

FIG. 8 shows a drive head mounting mating surface of a head according to an embodiment of the present invention, in which the range of (///) diagonal lines is the range of the trajectory relative to the center of rotation of the magazine device of the head clamper and the center of rotation of the head changing device. , Each device can be installed freely except the shaded area, and the bush 25 for fitting the locate pin 24 and the locate pin hole 33 for fitting the locate pin 33 when clamped to the magazine side.
a. If high-precision positioning that cannot be satisfied with the locate pin and bush method is required, positioning wedges 40 are provided at three locations to position the head with high precision, and air for positioning the head in the clamping direction and confirming the clamp. Positioning pad 4 with four contact confirmation devices
1, a coolant supply port 42, an air supply port 43, a type discrimination pin hole 44 for discriminating each head, and a tap command shaft 45 required in the case of a tap processing head are one embodiment. .

It is needless to say that the present invention is not limited to the above-described embodiment, and design changes can be made within the scope of the present invention.

(Effect) The effect of the present invention is that the multi-axis head is tilted 90 ° and at the same time
By rotating 180 degrees on its own, the clamp position in the head exchange device and the clamp position in the magazine device can be installed on the same side, so the turning radius of the head can be made smaller,
Figure 1 As can be seen by comparing the range other than the range (///) in Fig. 8, the range in which each device can be mounted on the drive head mounting surface of the head, that is, the increase in the degree of freedom in design, enables a compact design. It became a machine head automatic exchange machine tool with a magazine that can be equipped with a multi-axis head that can shorten the processing cycle time and support various processing.

[Brief description of drawings]

FIG. 1 shows an embodiment of a mating surface of a multi-axis head and a drive head, which is mounted on a conventional automatic head-changing machine tool with a magazine. FIG. 2 is a side view of an automatic head changing machine tool with a makagin according to an embodiment of the present invention. FIG. 3 and FIG. 4 are sectional views showing the swivel drive mechanism of the head exchanging device. 5 and 6 FIG. 7 is a sectional view of a tilt device and a magazine device according to an embodiment of the present invention. FIG. 8 shows a drive head mounting surface view of the head. 1 …… Bed, 2 …… Feeding unit, 3 …… Drive head, 4,20 …… Head clamper, 5 …… Clamping member, 6…
… Spindle drive motor, 7 …… Tilt cylinder, 8…
… Ring gear, 9, 13 …… Pinion, 10 …… Magazine drive motor, 11 …… Magazine clamp cylinder, 12 …… Rack gear, 14 …… Input arm, 15 …… Planetary gear, 16 ……
Sun gear, 17 …… eccentric shaft, 18 …… arm, 19 …… head replacement shaft, 21 …… cylinder, 22 …… movable bar, 23 …… fixed plate, 24, 33 …… locate pin, 24 a …… locate pin Flange end face, 24b …… Locate pin end face 25 …… Bushing, 25a
...... Bush end face, 26 …… Swivel axis, 27 …… Movable bevel gear, 28
...... Fixed bevel gear, 29 ...... Housing, 30 ...... face plate, 30a ......
Face plate notch, 31 …… guide bar, 32 …… plate, 33a…
Locating pin hole, 34 block, 34a groove, 35 pivot, 36 clamper, 37 pusher, 38 pin, 39 pin hole, 40 positioning wedge, 41 positioning Pad, 42 ... Coolant supply port, 43 ... Air supply port, 44 ... Pin hole for type identification, 45 ... Tap command axis, A ... Head replacement device, B ... Tilt device, C ... Magazine device , D …… Spindle drive coupling, E, F …… Standby position, G
…… Head replacement position, H1 to H3 …… Multi-axis head, OA …… Head replacement arm swivel center, OM …… Head magazine swivel center,
R1, R2 ... turning radius, K1 ... Head exchange device clamp location, K2 ... Magazine device clamp location, W ... Work.

Claims (1)

[Claims] 1. A drive head having an exchange head mounted thereon is mounted on a feed unit slidable according to a sliding surface of a bed, and a plurality of heads are accommodated in an upper portion of a machine frame base to be arbitrarily selected. In a head exchange type machine tool having a magazine device for turning and indexing a head, a magazine device or a head exchange device between a head delivery position E of the magazine device and the tilt device and a head delivery position F of the tilt device and the head exchange device. Release the grip of the replacement head that is being gripped by the clamper, grip the clamper and locate pin of the tilt device, transfer the replacement head to the tilt device, tilt the tilt device between EF, and grip the replacement head. ° A tilt device that can rotate and transfer the replacement head to the magazine device or the clamper of the head replacement device. When a head transfer position G of the drive head and the head changer, the respective clamper and the locating pin of the tilting device and the head transfer position F at the drive head and tilting device of the head changer,
The gripping position of the replacement head is released, the clamper built in the head replacement device grips the replacement head, the replacement head is transferred to the head replacement device, and the head replacement device is turned 180 ° to deliver the transfer position. An automatic head exchange machine tool with a magazine, comprising a head exchange device for exchanging the G exchange head and the exchange position F exchange head.