DE7701915U1 - TEACHING TO ASSEMBLE MOLDED PIECES - Google Patents

Description

Pont-a-Mousson S.A., 91 avenue de la Liberation, ; F-54OOO Nancy, France

Teaching for the assembly of castings.

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The invention relates to a method for the production of forum castings with at least one large main dimension, for example, large-dimension castings, such as roadway frames.

It turns out that in molding, especially in casting, it is difficult to obtain molded parts of large dimensions with acceptable tolerances. If one the other hand, establishes a highly mechanized plant, one is with regard to the dimensions of the fittings because of the schedule to own properties eingeschrän ¹ ** · comes adding that in · increase in the dimensions of the molded pieces grow mistakes in equal measure: distortions, defects in loading, and shrinkage that is difficult to control changes the integrity of the workpieces and their external appearance.

The object of the invention is therefore to eliminate these disadvantages and to produce castings of large dimensions with very good dimensions Allow accuracy.

To this end, it has a method for the subject that is characterized in that the workpiece in several separate Basic elements is poured which are divided along the direction of the main dimension, and that these basic elements by the following successive operations are combined:

- Placing the basic elements in such a way that they are in the direction mentioned facing each other, on a teaching with a

^ direction for a bracket in the transverse direction and with two stops with variable spacing in the desired direction;

- Adjustment of the distance between the stops of the gauge to the one for the Workpiece desired value;

- Bringing the basic elements and the stops of the teaching into contact;

- Filling of filler material into the space existing between the basic elements.

The invention also relates to a teaching for carrying out this method.

Other features and advantages of the invention will become apparent from the f. The following description of an embodiment with reference to the

Drawing. ■

This shows in:

Fig. 1 shows the application of the method according to the invention in the Production of a roadway shaft frame reproducing the teaching used; and in

2 shows the same example of use after the method has been completed. The frame or part to be produced is a sprue from legal

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angular shape and consists of two identical basic elements or components 1 and 1a of U-shape and angled profile cross-section. The profile comprises a first leg 2 for formation

perpendicular to a flat base for the frame and a second V on the first leg standing leg 3 to form the rectangular belt of the frame. The base leg 2 is with respect to the belt leg 3 directed outwards and provided with stiffening corners 4, which are spaced next to each other between the two legs are attached to the outside of the frame. Furthermore, on the inside of the frame and halfway up the belt leg 3 is a Reinforcing rib 5 attached, which serves to accommodate a cover, not shown, and at a certain distance from the ends of the legs of the "U" is interrupted for a reason to be explained later. After all, contains every primitive at each end of the legs of the "U" a rectangular connecting flange 6, which is perpendicular to the legs 2 and 3 and a Has screw hole 7.

The production of this frame is carried out by separately casting the two basic elements 1 and 1a in suitable casting molds of shortened Dimensions and subsequent assembly of the two basic elements on a gauge 8.

This gauge 8 has a contact surface 9, formed by a rectangular, flat plate, as well as carried by this support surface Attacks on. These stops comprise a first group of side or alignment stops 10a and 10b along the longitudinal sides the contact surface and a second group of stops 11a and 11b with variable spacing attached along the small sides are, wherein the contact surface and the side stops a device for holding the frame in the transverse direction during of assembly. All the stops forming the systems show, for example, the shape of a triangular prism perpendicular to the contact surface and its apex edge is against the base element directed that must be supported there.

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The lateral or alignment stops consist of stops 1oa, here one per leg of the basic element, as well as inner stops 1ob, also one per base element leg, these stops are attached to the mounting surface and a distance in approximately equal to the length of a leg of a base element. The stops with variable spacing also exist of outer stops 11a, here one per basic element, and inner stops 11b, here two per basic element, but these are a base element 1 associated stops 11a and 11b on the contact surface attached and spaced from the length of the base of the basic element, while, if the outer, the other The outer stop 11a associated with the base element 1a is fastened in the same way on the contact surface, the associated inner one Stops 11b movably attached to this contact surface are, for example, by sliding lower lugs of these stops in slots 12 which are parallel to the large sides of the landing surface are aligned. The inner stops 1ob and 11b finally have a greater height than the outer stops 1oa and 11a, because only they essentially serve to adjust the basic elements through their inner surface, while the others above all serve to block, and they are in the event that no inner edge strip 5 is provided, must extend over the entire height of the base element.

The teaching is completed by two parts in the form of a bracket 13, where the distance between the legs is the length of the connecting flanges 6 of the basic elements corresponds to the height of that of the basic elements, the web of each bracket having a hole 14 for filling with adhesive and a discharge opening 15.

The assembly of the basic elements on the teaching happens as follows Wise:

First you put the basic elements 1 and 1a on the contact surface 9 such that they are next to each other and in the direction of their legs

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Direction X-X of the large side of the contact surface lie, with the Web and the legs of these basic elements sit between the stops 11a and 11b or the stops 1oa and 1ob. Because the fixed spacing of the stops 1oa and 1ob and the play of the stops 11a and 11b assigned to the element 1, the element sits 1 immovable ei L of the contact surface, while the element 1a on the contact surface in direction X-X because of the mobility of the it can slide inner stops 11b associated with it.

Then you set the inner length of the frame to the desired value the distance between the two inner stops 11b by moving the stops 11b assigned to the base element 1a into the elongated Holes 12, which are graduated for this purpose, for example by counting marks or the like, which allow the To keep stops on the settling surface immovable in the predetermined position.

The base element 1a is then brought into contact with the stops 11b in such a way that the two basic elements 1 and 1a are exactly in their desired mutual position in order for the out the frame provided for the two basic elements must be taken into account very precisely.

Then you put bolts 16 in the holes 7 of the flanges 6 of the two Basic elements, but without putting them on, solely to achieve perfect alignment of the two basic elements.

You then put the two brackets 13 over each of the two into consideration Coming pairs of flanges 6 and so tightly closes the spaces between the basic elements. Then you inject in these spaces and through the holes in the brackets 14 adhesive 17, for example an epoxy resin with or without filler, such as that it completely fills the spaces in between.

Once the glue has hardened, what about half an hour

- 6 "■

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takes up to four hours, with the possibility of the hardening process To accelerate in an oven, the bolts 16 are tightened. The desired manhole frame is thus obtained the exact desired side lengths, with the screw connection possibly allowing a slight preload to apply the bond points.

If the connection is to be permanent, the screws can be blocked by soldering points or the like after tightening.

In addition to its main role as a filler, which on the one hand allows despite the large ones made possible by the tolerances of the foundry. Fluctuations on the one hand on the dimensions of a workpiece set very precise values and on the other hand, if necessary, the production of workpieces of very large dimensions start from Allows castings of smaller dimensions, the adhesive also serves as a means of uniting the various structural elements and allows, if necessary, the concealment of possible surface defects on the connecting flanges 6.

In the particular application described, the invention allows roadway shaft frames of significantly larger dimensions than usual to manufacture. However, this application is given as an example only, and not intended to be limiting; actually is the invention can also be used when assembling very different components bar, such as T-connectors, elbows, fork pieces, for assembling pipe systems or even large containers, boilers, etc.

The invention also allows the production of various objects from standardized components in the form of ¹¹ U "," L ", straight pieces, etc., whereby in each case assembly stops for the filling process and, if necessary, a screw connection are to be provided.

One can also use a teaching in the form of the counter-

or make use of a universal teaching, the application of which is then limited to certain types of fittings is.

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Claims (4)

Pont-a-Mousson S.A. Claims to protection 1. Teaching for the assembly of castings with at least one large Main dimension of several separate basic elements, characterized by one of the dimensions of the mounting plate (9) corresponding to the cast piece to be assembled on the stops (10a, 10b; 11a, 11b) for the cast base elements (1, 1a) are arranged, of which the stops (11b) arranged in the direction of the larger main dimension (X-X) can be changed in their mutual spacing are. 2. Teaching according to claim 1, characterized / that the various stops consist of bolt-like elements mounted on the contact surface (9), the adjustable spacing or elements Stops (11b) are movable in slots (12) of the mounting plate (9) and all other stops (10a, 10b, 11a, 11b) firmly on the contact surface (9) are attached. 3. Teaching according to claims 1 or 2..for the assembly of a workpiece with central recess, characterized by inner stops (11b, 10b) in the interior of the area of the basic elements (1, 1a) and further stops (10a, 11a) for fixing the basic elements (1, 1a) outside the same, with at least the inner stops stops in the direction of the largest main dimension (11b) are changeable in the distance from each other. 4. Teaching according to claims 1 to 3, characterized by Cover brackets (13) which can be placed over the ends of the basic elements (1, 1a) on the mounting plate (9).