JPS5817717Y2 - Automatic work transfer device in machining center - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic work transfer device in a machining center.

If workers manually attach and detach workpieces to and from the machining center table, the machining center, which was purchased at an expensive price, cannot be fully operated.
This causes the high efficiency of this product to be diminished.

It also places a heavy burden on the workers. The present invention is an attempt to improve this point, and uses a one-pitch indexing device to drive the pallet that supports the workpiece so that it moves intermittently over a precise distance on the base. The purpose of this system is to ensure that pallets are smoothly supplied to the machining center from the pallet cradle of the machine, so that the machining center can operate unattended and efficiently, and to completely save the labor of the workers who install and remove workpieces. There is.

An embodiment of the present invention will be described based on the drawings.

In FIG. 1, 1 is a machining center, 2 is its main body, and 3 is a pallet changer section.

This pallet changer section 3 is provided with a rotating pallet holder 4 that rotates about its center as a fulcrum.

Further, an annular base 5 is arranged next to the machining center 1.

As shown in FIGS. 1 and 2, this base 5 is formed by welding a combination of equal-shaped steel, U-shaped steel, etc., and has annular receiving portions 6 and 7 at its upper end. Keep it
Ten pallet holders 10, which move on the receivers 6, 7 via rollers 8, 9, are mounted at predetermined intervals on the upper surface of the receivers 6,7.

The inner lower surfaces of the ten pallet holders 10 are fixed to the upper surface of an annular drive ring 11 disposed inside the receiving portion 6, and the lower surface of the drive ring 11 is fixed to the upper surface of the annular drive ring 11.
10 index pins 1 corresponding to 0 pallet holders 10
2 is provided protrudingly.

Further, a 1-pitch indexing device 13 that sequentially pushes the ten index pins 12 one by one and determines their positions is provided on the base 5.
It is located in one place.

Further, on the upper surface of the pallet pedestal 10, pallets 14 that can be slid from the upper surface to the pallet changer section 3 of the machining center 1 are placed, respectively.
A workpiece to be processed by the machining center 1 is supported by this pallet 14.

Retaining parts 15 protruding from both inside and outside sides of this pallet 14
An engaging groove 16 is formed in each of the pallets 14 in the direction in which the pallet 14 is transferred in an annular manner on the pallet holder 10.

Further, a cylinder device 17 is provided as a transfer device from the center of the device toward the pallet changer section 3 of the machining center 1.

This cylinder device 17 is for transferring the pallet 14 from the pallet holder 10 to the pallet changer section 3 of the machining center 1, and the tip of the cylinder rod 18 is provided with an engaging groove that engages with the engaging groove 16 of the pallet 14. A mating end 19 is formed.

Next, the 1-pitch indexing device 13 attaches a long bracket 20 to the middle stage of the base 5.
A guide rail 21 is attached to the outer surface of the guide rail 21, a slider 22 is slidably fitted to this guide rail 21, a spacer 23 is fixed to this slider 22, and a support shaft 24 is attached to the upper surface of this spacer 23. The rotatable slide plate 25 is superimposed.

Further, a guide pin 26 is fixed to the spacer 23, and the head of this guide pin 26 is attached to the slide plate 25.
A stopper pin 28 is provided projecting below the tip of the slide plate 25 to fit into the guide hole 27 formed in the guide hole 27 and to restrict rotation and movement of the slide plate 25. Both ends of the contraction coil spring 29 are locked with the lower end.

Further, a pushing cylinder device 30 is provided on the rear end surface of the slider 22.
The tip of the cylinder rod 31 is fixed, and the sliding plate 25 is moved by moving the cylinder rod 31 forward and backward.
is moved forward and backward along the guide rail 21.

The slide plate 25 rotates about the support shaft 24 to escape outward when the index pin 12a, which is about to be pushed, presses the slope surface 32 of the plate 25 when the slide plate 25 moves backward. After passing through the output pin 12a, it returns to its original position by the contraction force of the contraction coil spring 29, and when it advances, it locks the index pin 12a at its tip and pushes it.

Further, a receiving cylinder device 33 is arranged to face the pushing cylinder device 30 with the slide plate 25 interposed therebetween.

This receiving cylinder device 33 is connected to the slide plate 2.
The cylinder rod 34 receives the index pin 12b pushed a predetermined distance by the pushing cylinder device 30 at a predetermined position via the cylinder rod 5, and when the index pin 12 is about to be pushed, the cylinder rod 34 retreats. Then, when attempting to receive and position the index pin 12, it advances to a predetermined position.

In FIG. 2, rollers 35 at the top of the pallet holder 10 slidably support the pallet 14, and rollers 36 attached to the outer surface of the drive ring 11 support the pallet 14 in a slidable manner.
1 is supported on the receiving portion 6.

Although it is of course possible to use this apparatus alone, in some cases, for example, when it is desired to process 20 workpieces, it is better to combine two apparatuses as shown in FIG. 1.

Next, the operation of this embodiment will be explained.

The ten pallet holders 10 and their pallets 14
are simultaneously accurately moved by the pallet interval, that is, 36°, by the l-pitch indexing device 13.

In FIG. 1, the pallet 14 is moved from position A to position B.
When moving to , the engaging end 19 of the cylinder device 17 engages with the engaging groove 16 of the engaging portion 15 of the pallet 14.

Next, the cylinder rod 18 of the cylinder device 17 advances,
The pallet 14 is moved from position B to position C of the pallet changer section 3.

Next, the rotating pallet holder 4 of the pallet changer section 3 is
Rotated 80 degrees and the pallet 14 is moved into position.

Due to this movement of the pallet 14, the engagement portion 15 and the engagement end 19 are disengaged.

Next, the transfer mechanism (not shown) of the machining center main body 2 is driven, and the pallet 14 is transferred to the processing position E, where a workpiece (not shown) is set in the machining center main body 2 and processed.

Then, the pallet 14 carrying the processed workpiece is mounted from position E by the reverse operation, and is returned to position B via C.

The pallet 14 at position B is further sent to position F by operation of the 1-pitch indexing device 13.

Note that when the pallet 14 moves from position to position C,
The pallet 14 and the cylinder rod 18 are engaged, and the position B
Needless to say, when moving from to position F, the coherence is broken.

In addition, when two apparatuses of this invention are combined as shown in FIG. Move this pallet 14 to position H.
is transferred from position H to position G using the cylinder device 17a.

In this way, the number of workpieces that can be processed can be increased by replacing the pallet 14 of processed workpieces in the transport device on the left in the figure with the pallet 14 of unprocessed workpieces in the transport device on the right. .

As described above, the pallet 14 supporting the workpiece can be automatically attached and detached from the machining center 1.

. Each of the above operations is centrally controlled on the sequence control panel.

According to the present invention, it is possible to automatically supply a pallet supporting a workpiece to a machining center, which allows the machining center to operate unattended and efficiently, and saves the labor of workers who install and remove workpieces. can be thoroughly implemented.

In particular, each pallet holder can be integrally driven by an annular drive ring 5 that connects each pallet holder, and the drive ring protrudes from the drive ring in correspondence with each of the pallet holders. The main feature is that a one-pitch indexing device that sequentially pushes and positions each index pin is installed in one place on the base, so the drive ring eliminates play between each pallet holder. There is no need for a positioning device between the transfer device and the machining center to position the two, and only the one-pitch indexing device pushes and positions each index pin of the drive ring. Therefore, all the pallet holders can be accurately stopped at predetermined positions, and (2) the pitch indexing device can be used as a transport drive unit as well as a positioning unit.

Further, the annular drive ring can be pushed, easily driven by a cylinder, etc., and can also be rotated smoothly.

In addition, since each pallet cradle is arranged along the annular drive ring, the gap between each pedestal does not change during movement. The number of pedestals can be increased, and the floor space of this transport device can be relatively reduced.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the automatic work transfer device in a machining center of the present invention, and FIG.
3 is a plan view of the 1-pitch indexing device, and FIG. 4 is a sectional view taken along the line I--■ in FIG. 3. 1... Machining center, 5... Base, 10... Pallet holder, 11...
Drive ring, 12... Index pin, 13...
...1 pitch indexing device, 14...Pallet, 1
7...Cylinder device as transfer device, 2
5...Slide plate, 30...Pushing cylinder device, 33...Receiving cylinder device.

Claims (2)

[Scope of utility model registration request] (1) An annular base installed in parallel on a machining center, a plurality of pallet holders supported by this base and moved on the base at predetermined intervals, and an annular drive that combines each of these pallet holders. a ring, an indexing pin protruding from the driving ring corresponding to each of the pallet holders, and a pitch provided at one location of the base so as to sequentially push and position each indexing pin. an indexing device;
The present invention is characterized by comprising a pallet that supports a workpiece placed on the upper surface of the pallet holder in a slidable manner from the upper surface to the machining center, and a transfer device that transfers the pallet from the pallet holder to the machining center. Automatic work transfer device in machining center. (2) The 1-pitch indexing device is composed of a pushing cylinder device that pushes the index pin, a receiving cylinder device that receives the index pin at a predetermined position, and a pushing cylinder device that will be pushed when the pushing cylinder device is retracted. It consists of a slide plate attached to the tip of the pushing cylinder device so that it escapes when pressed by the indexing pin that is about to move, and also locks and pushes the indexing pin when the pushing cylinder device advances. An automatic workpiece conveyance device in a machining center according to claim 1, characterized in that: