JPS59196139A - Workpiece fixing system - Google Patents

Abstract

PURPOSE:To enable application on various workpieces with simple structure by providing movable stoppers for limiting the advancing end positions of pallet and workpiece. CONSTITUTION:On the basis of a type of workpiece to be carried through conveyor, the advance/retreat position of a stopper shaft 8a in a pallet advancing end limiting stopper 8 is regulated through numerical control by means of a servo motor 9. Consequently the advancing end position of the pallet 13 to be carried onto a guide face is determined. In accordance with the type of workpiece, the stopper shaft 16 of a movable stopper 15 will limit the advancing end of a pusher 12 for pushing the workpiece to predetermined position and regulate by means of a servo motor 17 such that the main knock pin 17 will correspond with one knock hole of the workpiece.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a workpiece mounting device that can commonly mount many types of workpieces.

(Prior Art) There are many types of automobile engine blocks depending on the engine type, and the position and pitch of a pair of dowel holes, which serve as a reference for positioning, are not constant because the cylinder block has a different thickness and shape. Therefore, when several types of cylinder blocks are mounted on pallets and processed on a processing line, it is necessary to manually change the position of the dowel pins on the pallet that positions each workpiece, or to replace the dowel pins. This was one of the reasons why productivity could not be improved.

In addition, there is a known device in which both the main and sub-knock bottles are moved manually by a feed screw shaft, but in this case, there are many guide parts below the workpiece, making it difficult to remove chips. Also, all knock bottles including the king knock bottle move -1
Furthermore, it is difficult and undesirable to provide such a complex drive mechanism on the pallet.

(Objective of the Invention) The present invention makes it possible to respond to changes in the position of the reference hole by simply making the sub-knock bin movable in one direction, without complicating the structure of the pallet. This makes it possible to handle a wide variety of workpieces.

(Structure of the Invention) The present invention includes a movable stopper device that makes the carrying-in direction of the workpiece and the carrying-in direction of the pallet perpendicular in a horizontal plane and regulates the carrying-in forward end position of the pallet carried into the guide surface, and the pallet. The pallet is provided with a movable stopper device that regulates the forward end position of the workpiece being carried into the pallet, and the pallet has a workpiece support surface, and a main body that engages and disengages from a pair of reference holes provided in the workpiece is provided on the pallet. It is equipped with a knock pin, a movable sub-knock pin that engages and disengages in correspondence with the other reference hole, and a clamp device that presses the workpiece against the support surface.

(Example) Embodiments of the present invention will be described below based on the drawings.

In Figures 1 to 3, 1 is a support stand, and 2 is a support stand 1.
It is a rotating table that is rotatably supported on the shaft.

This rotary table 2 has a guide surface 3 for holding a pallet 13, and this guide surface 3 changes the loading position of the workpiece W and the loading position of the pallet 13, which will be described later, by the rotation of the rotary table 2. located in Reference numeral 4 denotes a cylinder for rotating the rotating table, and its piston rod 5 is coupled to the rotating table 2.

10 is a conveyor that transports the workpiece W to the carry-in position.

Further, 6 is a turntable that supports the pallet 13 to be carried in (unloaded). Workpiece W by the above conveyor IOK
The carrying direction of the pallet 13 from the turntable 6 is arranged to be orthogonal to each other in a horizontal plane, and the supporting table 1 is installed at the orthogonal intersection,
As a result of the rotation, the guide surface 3 is located at the same horizontal position as the turntable 6 and at a vertical position perpendicular to the direction in which the workpiece W is carried in by the conveyor 10.

Reference numeral 7 denotes a cylinder for carrying in and carrying out pallets, which is used between the turntable 6 and the guide surface 3 in a horizontal plane to carry the pallet 13 from the turntable 6 to the guide surface 3, and also to carry the pallet 13 from the turntable 6 to the guide surface 3.
It is then transported to the turntable 6.

8 is a movable stopper device that regulates the forward end position of the pallet 13 carried from the turntable 6 to the guide surface 3. This movable strut device 8 is shown in FIG.
A stop shaft 8α is moved forward and backward by a servo motor 9, and the forward end position of the carry-in of the knollet 13 is changed depending on the type of workpiece to be attached to the knollet 13.

As is clear from FIGS. 2 and 3, the pallet 13 has a workpiece support surface 3-3 (L) perpendicular to the guide surface 3, and a workpiece W is provided on this workpiece support surface 13cL. A fixed main knock pin 17 that engages and disengages from a pair of reference holes under one force, and a movable sub knock pin 18 that engages and disengages in response to a reference hole under another force, and a workpiece W is connected to a workpiece support surface. A clamp device 19 that presses the pressure to 1γ is provided.

Guide surface 3Vc Work supporting surface 1 of pallet 13 held
γ is located in the same horizontal plane as the conveyor 10 when the guide surface 3 is rotated to the vertical plane position.

In this state, the auxiliary knock bin shift device 21 is used to shift the movable block so that the position of the auxiliary knock bin 18 corresponds to the reference hole position, which varies depending on the type of workpiece W, and the main and auxiliary knock bins 17 and 18 are moved to the reference hole. A knocking cylinder for operating the knock bottle operating knob device for engagement, and a clamp drive device η for operating the clamping device 19.
and are provided.

A workpiece pushing cylinder 11 is installed to push the workpiece onto the workpiece support surface of the workpiece W pallet 13 transported by the conveyor 10, and the forward end of the pusher 12 is moved according to the type of workpiece W. Movable stopper device 15 that regulates
or are placed. In this movable stopper device 15, a stopper shaft 16 is shifted by a servo motor 17 in the direction of the axis of movement of the bushing 12.

The above-mentioned apparatus of the present invention is installed at loading station A, and as shown in FIG. Front turntable T2. Conveyor C2 is connected to T3, conveyor C3 is connected to this via turntable T4Y, and return conveyor is connected to turntable 6 via turntable 6α. Used exclusively for transporting workpieces. In this case, 22a is an unclamp drive device for the clamp device 19, and 20a is a cylinder for removing a knock bottle.

Since the present invention has the structure as described above, an empty pallet 1
3 is to be carried in and held on the guide surface 3, the rotating table 2 is rotated to a horizontal position so that the guide surface 3 is on the same plane as the turntable 6, and the pallet 3 on the turntable 6 is carried in and carried out. It is carried in by the cylinder 7 for use. At this time, by numerical control based on the type of workpiece W carried in from the conveyor 10, the stopper device 8 for regulating the pallet advance end adjusts the forward and backward positions of the stopper shaft 8α by the servo motor 9.
The dowel holes serving as the reference for positioning the workpiece W, the main dowel 17, the sub-notch, and the groove 18 on the pallet 13 are aligned in the direction perpendicular to the direction of the conveying force of the workpiece W, so that the corresponding dowel (guide surface) The forward end position of the pallet 13 carried into the conveyor 10 is determined.After the pallet 13 is carried in and held on the guide surface 3 and regulated at a predetermined position by the stopper shaft 8a, the rotary table 2 is moved 90 degrees in the direction of force of the conveyor 10. As a result, the guide surface 3, which was a horizontal surface, becomes a vertical surface as shown in FIG. In this state, the stopper shaft 16 of the movable stopper device 15
According to the type of workpiece W to be carried in, the forward end of the pusher 12 that pushes the workpiece W should be regulated at a predetermined position so that the main knock pin 17 corresponds to one dowel hole of the workpiece W after carrying it in (numerical value). The position of the movable sub-knock bin 18 is adjusted by the servo motor 17 under control.
The workpiece W on the conveyor 10 is placed in the corresponding reference hole (adjusted by the sub-knock bin shift device 21).
is pushed by the pusher 12, guided by the workpiece guide rail 14, and carried onto the workpiece support surface 1 of the pallet 13. The carried-in workpiece W is positioned by engaging the main and auxiliary knock bins 17 and 18 with the protruding reference hole by the operation of the knock-in cylinder, and is also moved to the clamping device by the clamping and driving device 22]9 operate,
The workpiece W is pressed against the workpiece support surface 13α and the pallet 13
It is installed integrally with the

After positioning and attaching the workpiece W to the missing pallet 13, the rotating table 2 is rotated 90 degrees in the opposite direction, and the guide surface 3 is positioned on the same horizontal plane as the turntable 6. Then, the pallet 13 on the guide surface 3 is carried out onto the turntable 6 by the operation of the cylinder 7 for carrying in and carrying out the pallet.

The pallet 13 carried out onto the turntable 6 is carried into the processing machines M1 and M2 based on the command, and as shown in FIG.
The workpiece W is machined by the tool swamp at the n-end of the main spindle of the processing machines M1 and M2.

The pallet 13 on which the workpiece W has been processed is transported to the turntable 6a of the unloading station B.
In the same manner as described above, the pallet 13 is carried onto the guide surface 3 of the rotating table 20, the rotating table 2 is rotated 90 degrees, and the clamping device 19 is operated to unclamp by the unclamping drive device nα. At the same time, the main and auxiliary knock bottles 17 and 18 are disengaged from the reference holes of the workpiece W by using the cylinder for removing the knockbottle, and are transported to the outside of the workpiece Wt pallet 13. After unloading the workpiece W, the rotary table 2 rotates 90 degrees in the opposite direction to unload the empty pallet 13 on the guide surface 3 onto the rotary table 6α, which is transferred to the loading station A Il by the return conveyor RC. :i is transported to the turntable 6.

(Effects) According to the above-described apparatus of the present invention, the pallet carried into the guide surface of the rotary table is held with its carrying forward end position being positioned in correspondence with the machining reference position of various workpieces, and the pallet is held on the guide surface of the rotating table. For pallets that are loaded on a surface, only the sub-knock pins must be moved and adjusted according to the pitch of the reference holes, which vary depending on the type of workpiece, so it is possible to position many types of workpieces on a common pallet. You can go ahead and install it to improve productivity. Further, the structure of the pallet does not need to be too complicated.

[Brief explanation of the drawing]

Figure 1 is a plan view of the apparatus of the present invention, Figure 2 is a perspective view of the apparatus of the present invention in a workpiece loading state, Figure 3 is a perspective view of the apparatus of the present invention in a pallet loading state, and Figure 4 is a workpiece on a pallet. FIG. 3 is a perspective view showing the processing state of the object. 1... Support stand, 2... Rotating stand, 3... Guide surface, 6
... Turntable, 7... Cylinder for pallet loading/unloading, 8... Stopper device for regulating pallet forward end,
10...Conveyor, 12...Butsusha, 13...
Pallet, 13α...Workpiece cutting surface, 15...Movable stopper device, 17...Main knock bottle, 18. Fist/secondary knock bottle-】911...Flang device, ΦQ movable block.

Claims (1)

[Claims] A movable stopper device that has a guide surface that makes the workpiece carry-in direction and the pallet carry-in direction orthogonal in a horizontal plane and that protects the pallet Z, and that regulates the carry-in forward end position of the pallet carried on the guide surface. and a movable stopper device for regulating the forward end position of a workpiece carried on a pallet held on a guide surface, the pallet having a workpiece support surface,
On this workpiece support surface, there is a fixed main dowel pin that engages and disengages from one of a pair of reference holes provided in the workpiece, a movable dowel pin that engages and disengages in response to the reference hole of another force, and a movable dowel pin that engages and disengages from one of a pair of reference holes provided in the workpiece. Equipped with a pressure clamp device on the support surface of the begging workpiece 1
A workpiece mounting device featuring the following features.