EP0041424B1 - Means to remove heads or to separate clusters - Google Patents

Description

The invention relates to an installation for dismantling or destemming of foundry parts, of the type comprising a tool press for demasselotting or destemming of the parts which are presented under the tool at the work station on a lower tool. positioning, such an installation is oleja like.

It relates to an embodiment of such an installation specially designed for rapid and safe mechanized handling of the parts to be treated as well as for dismantling or destemming any type of part, by lending itself to a rapid change of tools.

Essentially, for this purpose, the installation according to the invention, comprising a tool-holder press for dismantling or destemming the parts presented under the tool at the work station on a lower positioning tool, is characterized in that it comprises a carousel with a star arm adapted at their free end to support the lower positioning tools by engagement of reciprocal shapes, and that the dismantling or destemming station includes a lifting device for each positioning tool in the dismantling position or de-stemming, this device being adapted to support the force of the press tool and to release the corresponding arm from the carousel.

• la figure 1 est une vue schématique d'implantation d'une installation de démasselottage selon l'invention;
• la figure 2 est une vue en élévation et coupe partielle d'une installation de démasselottage selon la figure 1;
• la figure 3 est une vue de détail en coupe du porte-outil de la presse de la figure 2 illustrant le montage et verrouillage de l'outil de démasselottage;
• la figure 4 est une vue en coupe suivant IV-IV de la figure 3;

Other particularities and advantages of the invention will appear moreover in the description below embodiment of such an installation, given by way of example and with reference to the appended drawing, in which:

• Figure 1 is a schematic view of implantation of a dismantling installation according to the invention;
• Figure 2 is an elevational view in partial section of a de-balancing installation according to Figure 1;
• Figure 3 is a detail view in section of the tool holder of the press of Figure 2 illustrating the mounting and locking of the dismantling tool;
• Figure 4 is a sectional view along line IV-IV of Figure 3;

Figure 5 is a detail view in elevation and partial section of the lifting device of the lower tool at the dismantling station.

The installation shown in FIGS. 1 and 2 comprises, with a vertical hydraulic press designated by 1 as a whole and intended to be provided with a de-balancing tool 2 movable along the vertical axis 3 of the press, a designated handling carousel par 4 as a whole and comprising star arms 5, here six in number, intended to be driven step by step with a rotational movement of 60 ° around the central axis 6 of the carousel, which is offset from to the axis 3 of the press so that the ends of the arms 5, intended to receive a tool for supporting the parts to be dismantled, are placed successively under the dismantling tool 2.

As can be seen in FIGS. 3 and 4, the sorting tool 2 can be assembled with the tool holder 7 of the press by fitting therein two pins 8 integral with the tool 2, each pin being split at its end at 9 and then forming a socket 10 for engaging an assembly block 11 linked to the piston rod 12 of a hydraulic cylinder 13 mounted on the tool holder. The wedge 11 is guided movably in the tool holder between its assembly position shown in solid lines in the drawing and its erasing position shown in phantom in Figure 3, for which it is to be seen that the split end in 9 of the spindle is then freely engaged and disengageable relative to the piston rod 12 of the actuator of the wedge.

The parts to be dismantled, such as that shown in example in P in FIG. 2, with their weights designed together by the reference 14, are arranged for the operation of dismantling on a holding cradle 15 of suitable shape, this cradle being secured , for example by screw, with a lower tool for positioning the part comprising a plate 16 which is positioned on the corresponding arm 5 by a simple engagement of form here provided using a lower yoke 17 whose cheeks overlap the arm 5 and have end notches 18 engaging on an axis 19 fixed transversely to the arm 5. This double engagement of the cheeks of the yoke 17 with the arm 5 and notches 18 with the axis 19 leads to positioning predetermined of the tray 16-cradle 15 assembly, and therefore of any part P disposed on the latter.

The plate 16 further comprises at its lower part feet 20, here four being placed in pairs on each side of the arm 5, and with which is intended to cooperate an elevating device installed at the dismantling station and designated by 21 as a whole. Figure 2 as shown in more detail in Figure 5.

This lifting device comprises a hydraulic cylinder, the cylinder 22 of which, fixed on a base 23, has a double outlet of the piston rod. The piston 24 in fact comprises an upper rod 25 on which is fixed a lifting plate 26 provided at its upper part with four pads 27 of distribution and shape adapted, here frustoconical, to cooperate with the ends of conjugate shape of the feet 20 of the plate 16 of the lower press tools.

The piston 24 comprises a lower rod 28, under the lower face 28a of which, in the high position of the lifting plate 26, is intended to be engaged a blocking block 29 linked to the piston rod 30 of a hydraulic cylinder 31, the cylinder of which is fixed to the base 23.

It is to be seen that thus, when a lower press tool with a plate 16 and a cradle 15 provided with a piece of de-shedding P is presented by one of the arms 5 of the carousel under the de-shedding tool in the high position ( see figure 2) the jack of the lifting device is supplied from below to lift slightly via the lifting plate 26 (arrow 32) said lower press tool relative to arm 5, so that this tool will no longer rest on the arm for the dismantling operation, which will consist in lowering the dismantling tool 2 onto the counterweights 14 of the part P by the hydraulic jack 33 for actuating the tool holder 7 of the press (arrow 34) in order to break these weights at the point of their connection neck with the part.

The carousel arm is therefore not subjected to the dismantling effort, while the jack 22-24 is here limited in its efforts to its lifting function, it being understood that the blocking block 29 is slid under the face 28a of the lower piston rod, so that the lifting device forms a sort of rigid heap of abutment resistant to the dismantling effort. After this operation, the shim 29 is erased and the jack 22-24 fed from the top so that the lifting plate 26 is lowered to allow the lower tooling to come to rest on the arm 5.

The simple engagement of shape provided between the plate 16 of the lower tool and the arm 5 not only allows this procedure of dismantling, but also allows to provide an easy evacuation of the part remaining on the lower tool (plate 16-cradle 15) at an evacuation station as designated by 35 as a whole.

This station comprises a handling arm 36, mounted tilting in the extension of the corresponding arm 5 and provided with two fingers 37 movable under the action of jacks not shown, these fingers being intended to engage in sleeves 38 fixed under the plate 16 parallel to the axis of the arm 5. The handling arm 36 is pivotally mounted around an axis 39 held between two support uprights 40, and it has an articulation yoke 36a with the piston rod 41 of a cylinder 42, the cylinder bottom of which is itself articulated at 43 in a yoke 44 secured to a base 45 carrying the uprights 40. Thus, when the cylinder 42 is retracted the handling arm 36 is in its position shown in lines full in Figure 2 for which its movable fingers 37 are located opposite the sleeves 38 of the plate 16 present at the evacuation station. By engagement of these fingers 37 in the sleeves 38, followed by the extension of the jack 49, the scrap of material 36 takes charge of the lower press equipment (16-15) and the dismantled part P'etil switches the assembly in the position shown in phantom in Figure 2, that is to say upwards and outwards relative to the carousel, until the part is unloaded by gravity, for example in a box of storage 46.

Then, by retraction of the jack, the lower tool (16-15) is brought back into position on the arm 5 of the carousel, ready to be reloaded with a piece to be dismantled by an operator at one of the other stop stations of the arm 5 considered which separate the evacuation station 35 from the dismantling station.

There is also here provided at the dismantling station, a device for receiving and discharging the flyweights 14 which is formed by means of two troughs 47 which are placed on either side of the arm 5 and of the lower tool carrying the part to be dismantled, between the moment of presentation of the latter under the dismantling tool and the implementation thereof. These chutes 47 are for this purpose linked to tilting arms 48 mounted integral with an axis 49 which is pivotally installed between uprights integral with the press frame and which carries a central lever 50 articulated at 51 with the piston rod 52 of a jack 53, the cylinder 54 of which is articulated at 55 on the base of the device.

Thus, when the jack 53 passes from its extension position to that retraction, the troughs 47 pass from their unloading and waiting position, shown in phantom, to their position for receiving the weights at the dismantling station, shown in solid line in Figure 2.

When the jack 53, after dismantling, is brought into the extended position, the troughs 47 are then tilted upwards and outwards relative to the carousel, to the position shown in phantom, in which their outer wall 47a then forms an inclined plane for gravity unloading in a recovery box 56.

Note that these evacuations of parts and weights by tilting upwards and outwards relative to the carousel allow gravity to be used while having an installation normally located as a whole on the ground. From the safety point of view, the operator is advantageously far from the work station and the evacuation stations, with the option of having several loading stations for parts to be treated.

It should also be noted that such an installation lends itself to easy installation and change of the upper and lower tools. Thus, in the first place, a complete tool, that is to say a lower tool and a dismantling tool, is put in place on one of the arms of the carousel to be brought into the stopped position under the tool holder Press. The latter is then lowered onto the dismantling tool to ensure that they are plugged in and locked as previously described, and after having brought the press tool holder back to the high position, the carousel can be maneuvered to equip its arms with lower tools allowing the operations unloading, dismantling and evacuation of parts and weights as described above.

For a tool change, it suffices to carry out a reverse operation for the removal of the upper and lower tools specific to the parts considered.

In the application of such an installation to the destemming of foundry parts, it can be, unlike the dismantling of parts, the chutes such as 47 which receive the parts during their destemming by the press tool and the evacuation station 35 which receives the part of the cluster which remains on the cradle after destemming of the parts.

Of course, the choice of controls and control members of such an installation can be the subject of numerous variants within the framework of the techniques and means of remote control and automation which are within the reach of those skilled in the art. .

Claims (7)

1. An installation for removing the deadheads or sullage pieces from castings, comprising a deadhead or sullage piece removing tool holding press (1), the castings (P) being presented under the tool at a working station on lower positioning tools (16, 17, 18, 19), characterized in that it comprises a roundabout conveyor (4) with starlike arranged arms (5) adapted, at their ends, to support the lower positioning tools (16, 17, 18, 19) by mutual engagement of corresponding forms, and in that the deadhead or sullage piece removing station comprises an elevating device (21) for each positioning tool adapted to bring the latter to a deadhead or sullage piece removing position, said device being adapted to support the force of the press tool and to relieve therefrom the corresponding arm of the roundabout conveying device.

2. An installation according to claim 1, characterized in that it comprises an output station (35) for evacuating the treated pieces, or parts removed therefrom, provided with a conveying device (36) cooperating with each lower positioning tool (16, 17, 18, 19) so as to place the latter into a position for evacuating said piece or part removed therefrom, and to bring it back into its position on the corresponding arm (5) of the roundabout conveying device.

3. An installation according to claim 1 or 2, characterized in that it comprises at the working station a movable receiving device (47) for receiving deadheads or pieces from which the deadheads have been removed, said device being adapted to be located on either side of the end of each arm (5) bearing the lower tools, and to evacuate them.

4. An installation according to one of the preceding claims, characterized in that the elevating device (21) has a hydraulic jack (22, 24, 25) and comprises a counter-bearing wedge piece for the elevated position of the device, which wedge piece is put in place for the deadhead or sullage piece removing operation.

5. An installation according to claims 2 to 4, characterized in that said conveying device (31) for the lower tools comprises an arm swivelling outwardly and upwardly with respect to the arms (5) until the corresponding tool is discharged by gravity.

6. An installation according one of claims 3 to 5, characterized in that said receiving and evacuating device comprises spouts (47) swivelling outwardly and upwardly with respect to the arms of the roundabout conveying device, and being discharged by gravity.

7. An installation according to one of the preceding claims, characterized in that the press tool holder (7) and the deadhead removing tool (2) are adapted to be assembled by mutual insertion and to be locked through the intermediary of a movable wedge piece (11) mountedonto the tool holder (7) and cooperating with the inserted part (8) of the deadhead removing toll.

Images