JPH0234735B2 - KAKOSOCHINOWARIDASHISOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The disclosed technique belongs to the technical field of an apparatus that performs processing indexing of a workpiece by repeated motion.

Therefore, the present invention relates to an indexing device for a processing device in which a workpiece previously machined to a predetermined size is held and displaced, and the positioning is repeated. The base plate has a cam and a slide unit on the top and bottom, and the index unit, which is fitted into the slide unit and is connected to a movement device provided on the base plate to be slidable, has a cam and a slide unit on the top and bottom. A rack that can be engaged with a latching portion provided opposite to the device is inserted, and a rack receiver that can be slid relative to the rack via a bullet is provided, and a pinion that is meshed with the rack is provided. A pair of shaft-mounted clamp shafts and a drive shaft connected to a motor provided in the unit are inserted to form a work index portion at the tip, and the base end of the pair of clamp shafts is inserted. It is suspended via a bullet from a vertically installed holder having a cam follower that engages with the cam, and
The present invention relates to an indexing device for a processing device, in which the workpiece is repeatedly displaced as the advancing/retracting device operates.

As is well known, indexing devices are widely used in machining devices such as broaching machines for positioning when repeatedly machining the same shape on one workpiece.

However, conventionally, holding and releasing the workpiece from the indexing device has generally been left to manual means, resulting in problems such as poor workability and complicated process control.

To deal with this, an indexing device equipped with an actuating device that automatically performs the above-mentioned holding and releasing operations has been devised and adopted, but a special actuator, motor, etc. to drive the actuating device has been devised and adopted. This not only increases the space occupied by the indexing device, but also complicates the structure, increases equipment costs, increases costs due to depreciation, and has the disadvantages of poor maintainability. Ta.

In addition, since the actuation device is attached to the indexing device, the work process becomes complicated, and the reproducibility of the workpiece position decreases between each process, making it difficult to guarantee product reliability and processing accuracy. I felt a sense of inconvenience.

The purpose of the present invention is to integrate the indexing device and the actuating device in view of the workability problems in the indexing device of the processing device based on the above-mentioned prior art, and to continuously move the workpiece using one advancement/retraction device and motor. It is an object of the present invention to solve the above-mentioned problems by performing holding, positioning, and disassociation, and to provide an indexing device for an excellent processing device that has a simple structure and high processing accuracy.

In accordance with the above-mentioned object, the structure of the present invention is such that a workpiece is mounted on the drive shaft of the workpiece index section, and then, as the advancing/retracting device is operated, the clamp shaft provided on the indexing unit is rotated by the engagement of the pinion and the rack. At the same time as the workpiece is clamped, the index unit moves via the slide unit, and then the workpiece is set at a predetermined machining position and machining is performed, and then the advance/retreat device is operated in reverse to move the workpiece. The index unit is returned to the initial position, and then the index drive section rotates the drive shaft by a set angle to displace the workpiece by a predetermined amount, and
Activate the advancing/retracting device again to carry out the above-mentioned clamping, moving,
The gist of this is that machining and displacement are automatically and repeatedly performed using a single advancing/retracting device and an index drive unit.

Next, one embodiment of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a broaching machine as a processing device, on which a well-known broach 4 is erected at a predetermined position via a drawing device 3 provided on a base 2.

Reference numeral 5 denotes an indexing device which constitutes the gist of the present invention. A base plate 7 whose back surface is fixed to a base frame 6 on the broach 4 has a cam 8 on the upper part and a rail 9 as a slide unit on the lower part so as to stand upright. On the other hand, hydraulic cylinders 10 are provided on both sides of the base plate 7 as advance/retreat devices.
and a plate 12 serving as a latching portion from which a stopper pin 11 is protruded are arranged to face each other.

Moreover, the hydraulic cylinder 1 is fitted into the rail 9.
A rack receiver 15 into which a rack 14 is inserted is fixed to the index unit 13 connected to the index unit 13. Tension spring 1 as a bullet in
Further, a pulse motor 19 as an index drive unit is installed upright with a sprocket 20 mounted on the shaft, and a chain 21 is attached to the sprocket 20.
A drive shaft 23 having at its base end another sprocket 22 which is linked via a drive shaft 23 has a work receiver 24 attached to its tip and a work ejector 25 interposed therebetween so as to be able to face the broach 4 and connect it to the index unit. 13 through suitable bearings.

The index unit is moved to the machining position, workpiece rotation position, workpiece mounting position, and workpiece ejecting position by the operating stroke of the hydraulic cylinder, and the rack 14 is moved to the rack receiving position. Relative dimensions are longer than 15,
Normally, it is projected toward the plate 12 by the tension spring 18, and the drive shaft 23 is latched to the index unit 13 via a flange 26 provided around the drive shaft 23. It is treated like this.

The work ejector 25 has a cylinder piston 28 whose tip faces the work receiver 24 via a compression spring 27, and a back surface of the cylinder piston 28, the other end of which is projected from the drive shaft 23. It consists of 29 pushrods.

Reference numeral 30 denotes an L-shaped lever, one end of which is in contact with the push rod 29 and the other end of which is engageable with the stopper pin 11.
It is pivotally supported by the bracket 31 of No. 3.

Clamp shafts 32, 32' are located on both sides of the drive shaft 23 and are inserted into the index unit 13, and pinions 34, 34' which engage with the rack 14 on the splines 33, 33' are attached to the shafts. is supported via compression springs 37, 37' by a holder 36 having a cam follower 35 whose base end engages with the cam 8, and is engaged with locking parts 38, 38';
Opposing clamp arms 39, 39' are provided at the tip.
is attached integrally.

In addition, the work receiver 2 of the drive shaft 23
4 and the clamp arms 39, 39' form a work clamp section 40.
A workpiece 41 attached to the handlebar 4 is held therebetween.

Furthermore, as the index unit 13 moves, the holder 36 is raised by the cam 8 just before it is located above the broach 4.

In the above-mentioned configuration, the workpiece mounting position is such that the hydraulic cylinder 10 is protruded and the clamp arms 39, 39' of the clamp shafts 32, 32' are opened to the workpiece receiver 24 as shown in FIG. After the workpiece 41 is mounted on the workpiece receiver 24, the hydraulic cylinder 10 is moved backward to move the workpiece 41 to a processing position on the broach 4.

At this time, first the rack 14 is connected to the tension spring 18.
Therefore, the pinions of the clamp shafts 32, 32' do not move with their tips in contact with the plate 12 of the base plate 7, and therefore engage with the rack 14 as the index unit 13 connected to the hydraulic cylinder 10 moves. After the clamp arms 39, 39' are rotated and the clamp arms 39, 39' are opposed to each other, the rack receiver 15 comes into contact with the bracket 16 of the rack 14 and separates from the plate 12, so that the clamp arms 39, 39' are rotated. Rotation stops.

Next, the holder 36 on which the clamp shafts 32, 32' are suspended is raised by the cam 8, and the shafts 32, 32' are raised accordingly, and the workpiece 41 is pressed and clamped by the clamp arms 39, 39'. .

During this time, the pinions 34, 34' are not raised by the splines 33, 33', and the rack 14
It will never come out of engagement.

Then, the work 41 is placed on the clamp arm 3.
9, 39' and the workpiece receiver 24, the hydraulic cylinder 1 is moved onto the broach 4 while being held between the workpiece index portion 40 and the workpiece receiver 24.
Stop the operation of 0.

Then, the broach 4 is placed facing the workpiece 41 using the drawing device 3 to perform a predetermined processing.

After the machining is completed, the hydraulic cylinder 10 is again extended halfway through its stroke and the index unit 13 is moved to a workpiece rotation position between the workpiece mounting position and the machining position. The holder 36 moves along with the clamp shafts 32, 32' and is lowered by the cam 8, while the clamp shaft 3
The clamp arms 39, 39' are attached to the workpiece 41 by engaging and pressing the locking parts 38, 38' of the parts 2, 32'.
turn away from

Therefore, the pulse motor 19 is operated to rotate the drive shaft 23 at a set angle to rotate the workpiece 4.
1 is indexed, and the index unit 13 is moved to the processing position again.

After repeatedly machining one workpiece 41 in this way, the hydraulic cylinder 10 is finally extended to the stroke end, and the index unit 13 is moved past the workpiece mounting position to the workpiece eject position. Then, in the process, the clamp arms 39, 39' clamp the workpiece 4.
Then, the rack 14 comes into contact with the plate 12 and stops moving, and at the same time the pinions 34, 34' rotate to open the clamp arms 39, 39', and then the drive shaft 23 The L-shaped lever 30 that comes into contact with the push rod 29 of the ejector 25 inserted into the stopper pin 11 engages with the stopper pin 11 and tilts to press the push rod 29.

Then, the rod 29 is connected to the cylinder piston 28.
against the compression spring 27 and the workpiece receiver 2
4 and automatically ejects the processed work 41.

Then, after the above work eject is completed,
The index unit 13 is slid back to the workpiece mounting position in the initial position, a new workpiece is mounted on the workpiece holder, and the above-mentioned process is recycled.

It goes without saying that the embodiments of this invention are not limited to the above-mentioned embodiments; for example, the processing device is not limited to a broaching machine but may also be a milling machine, and the hydraulic cylinder moves the workpiece to the processing position during ejection. It is also possible to adopt various modes such as a combination of a rotary drive device and a feed screw as the actuator.

Further, the pulse motor is not limited to this, and any actuator that can perform a predetermined angle indexing operation by a combination of a cam index unit, a rotational drive device, and a rotational phase detection device can be used.

As described above, according to the present invention, in the indexing device of the processing device, the index unit, which is basically inserted into the slide unit of the base plate, connects the rack holder to the rack inserted into the rack holder and the bullet. and a clamp shaft which is connected to and connected to the advancing and retracting device through a rack, and on the other hand, a latching portion is provided on the base plate opposite to the advancing and retracting device, and a pinion that is engaged with the rack is mounted on the shaft. A drive shaft linked to an index drive section is inserted through the base plate to form a work index section, so that when the advancing/retracting device is operated, the index unit is moved by the slide unit to move the rack. The pinion is then rotated with the movement of the index unit to release the work index section, and then the index drive section is caused to rotate the drive shaft by a set angle. Since the workpiece is indexed continuously by one device, the reproducibility of the position is good, the machining accuracy is improved, and the reliability of the product is increased. Manufacturing control and process control become easier, and the excellent effect of being able to reduce total costs is achieved.

Further, since the clamp shaft is vertically installed on a holder having a cam follower that is engaged with the cam of the base plate, when the clamp shaft rotates with the pinion, the engagement between the holder and the cam causes Since the drive shaft and the clamp shaft are protruded, the drive shaft and the clamp shaft rotate smoothly without resistance, and do not slide against the workpiece, thereby preventing manufacturing defects in the product.

Furthermore, since conveyance indexing is performed with one device, the device is compact and has good installation conditions.
Therefore, there are also advantages in that equipment costs are reduced and product costs can be reduced due to depreciation.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic explanatory diagram of the embodiment, and FIG. 2 is a schematic illustration of the embodiment.
Figure 3 is a cross-sectional explanatory diagram of Figure 1.
FIG. 4 is an explanatory cross-sectional view, and is an explanatory view of the operating state of the work index section. 41... Workpiece, 1... Processing device, 5... Indexing device, 6... Frame, 7... Base plate,
9...Slide unit, 8...Cam, 13...
...Index unit, 10... Advancement/retraction device, 1
4... Rack, 18... Bullet machine, 15... Rack receiver, 12... Latching part, 34, 34'... Pinion,
32, 32'... Clamp shaft, 19... Index drive section, 23... Drive shaft,
40...Work index section, 35...Cam follower, 36...Holder.

Claims (1)

[Claims] 1. In an indexing device of a processing device in which a set workpiece is clamped and displaced to achieve positioning, a base plate slides onto the frame.
The index unit is fixedly installed with a unit and a cam, and is inserted into the slide unit.The index unit is connected to the advancing/retracting device, and a rack is inserted into the index unit. The index unit is provided with a clamp shaft having a locking portion facing the advancement/retraction device, a clamp shaft having a pinion mounted thereon which is engaged with the rack, and a drive shaft linked to the index drive portion. An indexing device of a processing device inserted therethrough to form a work index portion, the clamp shaft being engaged with the cam.