DE2945076C2 - Device for loading cylindrical cast parts - Google Patents

Description

characterized,

a) that on both sides of the movable frame (11) two groups of cast-in parts loading cylinders {5 ^ are arranged so that the geometris see The main levels of both groups intersect,

b) that on the movable frame (11) Component (10) is arranged so that it engages with the movable mold half (7) can be brought and

c) that each casting-loading cylinder (5) has an inner rod (57) attached at one end a holder (59) for holding a casting part (8) and an outer rod (58) has an ejection sleeve (60) to the pouring part (8) in the movable mold half (_7) to push /.

2. Device according to Anspruö I, characterized in that that the transfer device (4) comprises a parallelogram guide that the manipulator (1) reciprocated in the horizontal state.

3. Apparatus according to claim 1, characterized in that a cylinder (12) for actuating the movable frame (11) is provided in a manner in which this part (10) against a Recess (32) of the movable mold half (7) can be pressed and that a rod (27) against the stationary mold half (6) can be pressed.

4. Apparatus according to claim 1, characterized in that each of the Einießteile- loading cylinder (5) is fixed to the movable frame (11) by means of an elastic member (16).

5. Apparatus according to claim 1, characterized in that that in each case the cast-in parts loading cylinders (5) arranged in groups are arranged next to one another are, and that the ejection sleeves (60) of the respective cylinders (5) are connected to each other by a connecting rod (68) are connected.

The invention relates to a device according to the preamble of claim I.

Such devices can be used in particular in die casting machines that are used to produce V-cylinder blocks of internal combustion engines. When the cylinder block of an engine is a Motor vehicle or the like is made from cast aluminum, cylindrical cast parts are made from Cast iron, which will later serve as cylinder liners, into the

Die-casting mold used in the die-casting machine. Liquid aluminum is then poured in so that the cylindrical cast parts and the cast aluminum are integral. To achieve this goal is needed one has a cast-in parts loading device with which such cylindrical cast-in parts are precisely defined can use spatial layers in the die casting mold. In this technique, the transfer devices quickly and smoothly between a pouring feed furnace and the die are moved back and forth. It is also necessary that the transfer device and the manipulator in a correct position with respect to the cast-in part receiving portions of FIG Die casting mold are brought. Finally, it must be possible to have a large number of cast parts at the same time to load. For this it is necessary that the slope between adjacent cast-in part receiving sections is the same as that having adjacent liner holders of the loader.

In the case of a cylinder block of an engine in which the cylinders are in a straight line or horizontally opposite each other, it is only necessary to determine the slope in a plane perpendicular to the axis of the Form casting machine to be considered. However, if the loading directions of the cylinder liners differ cross, as in the case of a cylinder block of a V-engine, then mw3 in addition to consideration the slope described above, care must be taken to position the manipulator correctly with regard to the cast-in part receiving sections in the longitudinal direction of the die casting machine. However, since the spacing distance between the movable Kokilienhhalf of the stationary Kokilienhhalf through the Switching time of a limit switch is determined, the movable half of the mold stops with an error of 2-3 mm, and then positioning in the axial direction becomes extremely difficult. One has a long time wanted to find a way to create better cast part feeders to handle these Can overcome difficulties.

In the German magazine "Gießerei-Praxis". No. 16/1965 on pages 331 to 336 is an automated high-performance process for die casting described by runners for electric motors. The rotor assemblies are cast-in parts that are automatically placed between the opened mold halves are used and then with the mold closed with Aluminum can be overmolded. However, there is no positioning problem when the mold halves

■ "> ') are opened more or less wide, since the The cylinder axis of the casting part coincides with the direction of movement of the movable mold half.

In issue no. 23/1973 of the same magazine, a machine is described on pages 415 to 418, for automatic die casting and deburring. Only in the margin is it noted that a automatic mold spraying device also for the automatic insertion of cast parts into the mold is usable. It is also mentioned that such

no parts directly with pliers or a special one Recording can be inserted. Any positioning difficulties that may arise are noted here not even hinted at.

DE-GM 19 20 116 and 19 20 783 show device

· "Lines for loading casting molds with core supports. With these spherical or cube-shaped supports for a core, there is no particular problem with regard to it their positioning. You will therefore be affected by the

The device shown is simply dropped into the mold.

DE-OS 19 19 152 shows an injection molding machine in which side cores after they are viewed from the side their place in the mold are blocked in such a way that they are blocked during the subsequent injection pressure can not evade. The side cores are themselves part of the die-casting mold. Your positioning does not depend on how far they are from each other or from the main chamber when they are open are away.

DE-PS 6 58 214 deals with a device for moving the cores and slide in injection and Die casting machines. Here, too, the core is, so to speak, a component of the mold and its positioning is consequently not affected by how far the mold halves are from one another in the open state remove.

From DE-OS 22 28 756 a manipulator has become known which has the generic features has, but is not intended for inserting casting parts, but for removing in the Injection molding machine molded parts from the machine. The problem that occurs when loading a mold half with cast-in parts occurs when the axial direction of the cylindrical cast-in parts is different from the direction of movement the movable mold half deviates, as is the case with a cylinder block of a V-engine, is therefore not addressed in this document. This device is designed to meet the requirements specified below Task neither intended nor suitable.

The object of the invention is to provide a device of the type specified in the preamble of claim 1 so to develop that it is able to load such molds with cast parts correctly positioned that are intended for the production of V-engines. The positioning should be despite the position error of the movable mold half be exact.

This object is achieved with the characterizing features of claim 1. More beneficial Refinements of the invention are specified in the subclaims.

Further advantages and embodiments of the invention emerge from the following description preferred embodiments of the invention based on the drawing. In the drawing 7th tends

Fig. 1 is a front view of an embodiment a loading device for a cylindrical pouring part.

2A shows a partially sectioned plan view of the manipulator and the coke.

2B shows an enlarged side view of a cylinder support,

Fig. 3A is a longitudinal sectional view of a casting loading cylinder.

3B and 3C are simplified longitudinal sections for the purpose of explaining the mode of operation of the pouring parts loading cylinder,

4 is a plan view of a device for Approach of cast-in parts.

5 shows a section through a modified support of the pouring cylinder and

FIG. 6 is a longitudinal section showing the cylinder connecting plate shown in FIG.

The in the F i g. I to 4 shown preferred embodiment of the invention comprises a Mani- ι pulator 1. which can be moved back and forth between a Die-casting machine 2 and a cast-in parts feed unit 3. In the exemplary embodiment, the manipulator 1 a total of six casting parts loading cylinder 5-1 to 5-6 and is back and forth by a transfer device 4 moved here, which represents a parallelogram joint. The movement takes place on a route, the one hand is defined by a stationary mold half 6 and a movable mold half 7 and one in FIG. 1 Position shown in phantom for the purpose of loading cast-in parts 8 from the cast-in parts supply unit 3 originate as the cast-in parts feeding furnace 41

> (Fig. 4) is shown in cast-in parts receiving sections in the movable mold half 7.

The manipulator 1 comprises a movable frame 11 which is perpendicular to the plane of the drawing F i g. 1 is slidably mounted on the transfer device 4, i.e. H. on a boom 46 one horizontal movable member 4a corresponding to the link arm of the parallelogram joint mechanism, a Cylinder 12 for reciprocating movement of the movable frame H in the longitudinal direction of the die casting machine (perpendicular to the plane of the drawing of FIG. 1) of the die casting machine 2, s «. iis molded parts loading cylinder 5-i to 5-6, the horizor-: ai mounted on the side plates of the movable frame 11 are, with the actuating ends of the cylinders on the inner side, and components 10 for determination the position.

The structure of the cast parts loading cylinder 5 will be illustrated with reference to FIG. 3A described. He includes one cylindrical tube 51, a head end cap 52,

a rod end cap 53, a sleeve 54, fluid channels 55 and 56 and inner and outer rods 57, 58 which are slidably provided in the tube 51 one within the other. A cylindrical holder 59 fits into a pouring part 8 (shown in phantom), can carry this and is connected to the actuating end of the rod 57, while a cylindrical pushing-out sleeve 60 for pushing the pouring part 8 is held by the holder 59, which is in the actuating end of the outer rod 58 is mounted. For the pistons 61, 62 of the inner and outer rods 57, 58, a flange 63 and a stepped opening 64 are provided which fit into one another in the direction of actuation of the inner rod 57. In the center of the free end of the holder 59 a conical projection 65 is provided which can come into engagement with a positioning recess 13 which is provided on the movable mold half 7. In one side of the holder 59 a ball 67 is provided, which is pressed outward by a pretensioned spring 66. The purpose of the spring 66 is to releasably hold the casting member 8 on the holder 59 by pressing it against its inner surface. Connecting rods 68 are connected to the inner end of the pushing cylinder 6, so that one at the same time iin _fc ießt'eile charging cylinder 5-1, 5-3 and 5-5 and the casting parts-loading cylinder 5-2, 5-4 and 5-6 can operate, which are arranged vertically. If a plurality of cast parts 8 are advanced out of order, there is a risk that some of them will not be able to get into the mold half 7. The connecting rods 68 ensure, however, that the respective casting parts 8 are moved forward at the same time. The cast parts loading cylinder 5 is fastened to the frame 11 by means of a \ rrns ö9 and is provided with reinforcing ribs 71. The reference numeral 70 relates to a threaded plug.

In order to better show the internal structure of the molding loading cylinder 5, the supporting structure for the movable frame H is not shown in FIG. 3A

shown. However, as F i 3. 2B and 5 show, it is mounted on the movable frame 11 so that it is a can tip little. According to FIG. 2B, the molding loading cylinder 5 is perpendicular to support members 14 which are connected to the movable frame 11. He is half floating on the Stützglicdern 14 stored, with the help of two flange sleeves 15 and cylindrical cushions 16, which from elastic material such. B. are made of rubber and have a thickness of 10 mm. You can do the same thing also achieve by using packings 17 which are Z- or U-shaped in cross-section, like this F i g. 5 shows.

In the storage example shown in Fig. 2B, at which the pouring parts loading cylinder 5 is semi-floating so that it is a little more horizontal Direction is movable is the distance between the vertical surfaces 15a of the two flange sleeves 15 Relatively greetings, so among other things it is difficult to find the To keep castings loading cylinder 5 at right angles with respect to the support members 14. This difficulty can be avoided by the construction shown in Fig. 5, according to which the distance between the two perpendicular surfaces 15a can be reduced.

With the help of this in FIG. 1 and 2A, the pouring parts · loading cylinders 5 are mounted on the movable frame 11 so that their axes - that is, the loading direction for the pouring parts 8 according to arrows A and B in FIG. 2A - cross each other in the front side of the movable mold half 7. The casting parts loading cylinders 5-1, 5-3 and 5-5 are mounted on a support 11-4 on the left side of the movable frame 11, while the casting parts loading cylinders 5-2, 5-4 and 5-6 are mounted on the right support Hb ) 5 are mounted with their working ends facing inwards. If you look in the direction of Fig.! sees the front, then the pouring parts loading cylinders 5 located on the right and left are arranged asymmetrically. However, if you look at the top view of Fig. 2, they appear symmetrical. In other words: They are staggered in the vertical direction. The geometric center axes of the casting parts loading cylinder 5 lying on the right and left intersect at point Ci , and this point CX lies a distance / before a point C2. in that the geometric center axes of the cast-in part receiving sections 9 intersect. The distance / changes a little because of the difference in the stop position every time the mold half 7 is clamped.

As described above, the movable frame 11 is mounted on a boom Ab of a horizontally movable member 4a. This construction is described in more detail with reference to FIG. 2A. As shown, guide shafts 21 extend transversely to the arms Ab. In this way they support the movable frame 11 so that a sliding movement in the vertical direction is possible with the aid of the bearings 22, as shown in FIG and the guide shafts 21 are fixedly connected to the arms Ab via sleeves 24. Oil seals 25 are provided on the opposite ends of the sleeves 24. In order that the frame 11 can be reciprocated, the cylinder 12 is arranged to be more stationary with respect to the dsr. Mold half 6 can be. With the flange 26, the cylinder 12 is fixed to a rear plate lic of the movable frame 11. An engaging part 28 is with the Working end of a piston rod 27 connected. The engagement part 28 has a flange 30 which can cooperate with a stop 29 which is attached to the boom Ab. The tip of the engagement part 28 has a bevel 31 with which it can grip into a recess dtr stationary mold half 8. The other component 10 is attached to the movable frame 11 by means of a frame 33. The frame 33 protrudes in the direction of the movable mold half 7.

Although in FIG. 2A, only two symmetrically arranged components 10 are drawn, there are still more, not shown upper and lower provided. Furthermore, gates 32 are complementary to the components 10 provided, in the corner areas of the opening the movable mold half 7. These components 10 and gates 32 not only control the movement of the movable frame 11, but also correct incorrect alignment positions in the vertical direction, cucniu you uaS Kippen ucS rviunipüiäiöfS!

impede. In other words, these elements serve to keep the casting parts loading cylinders 5 in the foreseen positions in front of the movable mold half 7 to position correctly.

Therefore, when the cylinder 12 is actuated while the various parts shown by solid lines retain the position shown, protrudes Piston rod 27 downwards (actually backwards) -iiid the tip of the engagement part 28 engages the Tip of the stationary mold half 6, as shown in dash-dotted lines. whereby the protrusion of the piston rod 27 is limited! will.

The fluid pressure supplied to the cylinder 12 moves the cylinder 12 itself, that with the movable one Frame 11 is fixedly connected, and therefore the movable frame U is moved upwards towards the movable mold half 7 moves. By the

at the gates 32 at the corners of the opening of the mold half 7, whereby the movement of the frame 11 is stopped. The above-mentioned distance has now shrunk to zero and the surfaces 10a of the component 10 are in contact with the gates 32. so that point Cl coincides with point C2 . Since the engagement part 28 rests against the stationary mold half 6 and the component 10 rests against the gates 32 of the movable mold half 7, not only is the position aligned, but the movable frame 11 is also stopped and the desired feed position is ensured without tilting.

When the various components have this position, the pouring part loading cylinder 5 is actuated and it the cast parts 8 are loaded into the cast part receiving sections 9 of the mold half 7. These Workflows are based on Fig.3B and 3C evident.

If the positions of the cast-in parts receiving sections 9 z. B. because of the thermal expansion of the mold half 7 are more or less offset, causes the engagement of the conical projection 65 in the Positioning recess 13 parallel movements of the casting parts loading cylinder 5 against the spring force of the Pillow 16. This ensures perfect alignment of the cast parts

Since the moving directions of the left gating ¹ parts-loading cylinder 5-1, 5-3 and 5-5 and the right casting parts-loading cylinder 5-2,5-4 and 5-6 intersect at an angle described above, it is impossible.

move both the left and right at the same time. Therefore, it is still necessary to provide an operating circuit so that after one working cycle the cylinder on one side the cylinder on the other side can be operated.

The manipulator 1 that has inserted the cast parts 8 into the mold half 7. becomes one side the die casting machine 2 is moved by the Ti, *. isfer device 4 (which will be described later), so that it can be supplied with new cast-in parts 8 there.

F i g. 4 is a plan view of an exemplary embodiment of the molding supply unit 3. As shown, molding supply furnaces 41 are provided, three of which are perpendicular Shooting units arranged one above the other corresponding to the three vertically aligned casting parts loading cylinders 5-1, 5-3 and 5-5 as well as 5-2, 5-4 and 5-6 to have. The feed direction of the casting parts 8 is such that they correspond to the left and right cylinders of the

(Manipulator ί correspond. At the exit ports of the Cast-in parts feed ovens 41 are guide rings 42 with which the cast-in parts 8 in Positions corresponding to the holders 59 can hold. Each insert feed furnace 41 has the inlet end a pusher 43. The cast parts 8 are fed to the feed ovens 41 by conveyor tracks 44. the Guide rings 42 also serve as compensation zones in which the cast parts 8 are on a constant basis Can hold temperature so that they can easily be mounted on the holders 59. The inner surfaces the guide rings 42 and the outer surfaces of the egg. ^ ießteile 8 are precisely machined so that between they have defined distance conditions.

In operation, the cast parts loading cylinders 5 become so operated that they bring the holder 59 to the guide rings 42, as shown in phantom. she receive the cast parts 8, which are pushed by pusher 43 to the holders 53. Since the The operation of the cylinder is similar to that of loading, so a detailed description is superfluous. Around To ensure smooth transitions when picking up and removing the cast parts 8, the front and rear ends of the holders 59 and the front ends of the ejection sleeves 60 are provided with bevels.

The transfer device 4, which moves the manipulator 1 «5 on the path between the die-casting mold 6, 7 and the cast-in parts feed unit 3, will now be described. This transfer device 4 comprises a parallelogram construction with which the manipulator 1 can be moved back and forth and still remains in such a horizontal position.As shown, it contains the horizontal member Aa corresponding to the connecting rod of a parallel construction, the boom Ab corresponding to the stationary strut, an actuating arm 4c, a support arm 4c / and pivot axes connecting these parts to one another. The lines that connect the axes of these swivel axes form a parallelogram. The actuating arm 4c is bent so that it does not collide with a compound Sann 2a of the die casting machine 2. A stopper 45 is provided at the bend, which can abut against the link arm la.

The transfer device 4 is mounted on a base 46. A fork head cylinder 47 is also mounted on this base 46. The working end 49 of the piston rod 48 is connected to the actuating arm 4c by means of a pin 50. A control unit 471 for the inflow and outflow of oil for the fork head cylinder 47 has a number of small bores 474 which extend in a direction perpendicular to the axis of the cylinder. In this way, a chamber 472 serving for oil supply and oil discharge can be connected to a cylinder chamber 473. With this construction, since the bores 474 close and open as the piston moves, the number of the bores 474 communicating with the cylinder chamber 473 increases on the oil supply side as the piston moves forward. However, the number of bores 474 is reduced on the outlet side. This avoids jolts at the beginning and end of the movement.

. When the fork head cylinder 47 is actuated, while it has a position shown in FIG I, the operating arm 4c of the support arm Ad rotated clockwise, so that the manipulator 1 - supported by the horizontally movable member Aa - according to one side of the die casting machine 2, moved, ie into a position according to the dash-dotted lines at reference number 3. In this position, the cast parts 8 are fed to the manipulator 1 in order to prepare for the next loading cycle. During this time, the die casting machine 2 is operated to cast molds. When the movable mold half is withdrawn to a waiting position after the molding operation has been completed, the clevis cylinders 47 are operated to reverse the operations so that the manipulator 1 is brought to a position shown by solid lines . The positioning and subsequent molding loading process are the same as described above.

Fig. 6 shows a connecting plate 501 which is used for this. Hydraulic fluid to the cast parts loading cylinders 5 to be supplied or withdrawn from these. The purpose of the connecting plate 501 is to To save line connections. So that the outlet openings of three adjacent Cylinders connected to each other with the connecting plate 501 through a passage 502, which at a flexible pipe 504 is connected as well as through a branch passage 503. According to this construction is enough a single flexible tube. It is thus possible to start the bending of the flexible pipe on Reduce the minimum and thus also reduce the vibrations of the cylinders to a minimum.

As described above, according to the invention, the manipulator 1 is constituted by a movable frame which is movable in the longitudinal direction of the die casting machine, regardless of whether there is a small flaw with regard to the stop position of the movable mold half. With the invention it is possible that Axes of the cast-in parts 8 with the axes of the cast-in parts receiving sections 9 to align bring. The interaction of the engagement parts of the movable frame with the auxiliary recesses of the Chill molds ensure an alignment not only in the horizontal, but also in the vertical direction. By doing the piston rod of the cylinder for moving the movable cylinder with the opposite Mold half comes into engagement, it is possible to the manipulator 1 in a predetermined position keep. Accordingly, it is possible to position it precisely because it is at one end of a long arm is mounted, which has a tendency to vibrate relative to the mold. That vibration is stopped. This is what makes it

possible, the casting parts 8 in the metal mold at a Automatic and easy to use high temperature atmosphere. Since the cast parts loading cylinder 5 with concentric inner and outer rods which are actuated by hydraulic fluid its structure is simplified and the various cylinders can be moved smoothly regardless of the differences in the properties of the feathers. The invention thus differs from known ones Constructions in which the piston of the inner rod is inside the outer rod and a spring is located in the outer rod on the rear side of the piston of the inner rod is located.

Since the manipulator 1 between the die casting machine 2 and the pouring part supply unit 3 by a Transfer device 4 is reciprocated, which consists of a parallelogram mechanism the pouring part? R always moves horizontally so that the There is no risk of falling.

Since the pouring parts loading cylinder 5 is supported in a semi-floating manner by the movable frame he shifts also follow when the loading position as a result of thermal expansion of the The mold changes, thereby ensuring accurate loading of the pouring parts 8.

When the die casting machine 2 is so constructed. that an actuating arm meets the connecting arm, such as this is drawn, the actuating arm is brought under control in a position close to the mold, so that its holding position can be adhered to more precisely. If oil supply and outlet control elements with many openings are used as described above, namely for the cylinder that the When the working cylinder is actuated, shocks can be absorbed better than in those cases in which independent Shock absorbers are used.

In addition 5 sheets of drawings

Claims (1)

Patent claims: 1. Device for inserting cylindrical cast-in parts for cast V-engines, with a Cast-in part manipulator, - by a transfer device on a route between a die-casting chill a die-casting machine and a cast-in-part feed unit can be moved back and forth, and - the one movable, by a power cylinder has a driven frame that is movable in the longitudinal direction of the die casting machine,