CS197492B1 - Stand from the concrete eventually from the reinforced concrete - Google Patents

Description

The invention relates to a frame made of concrete or iron concrete on which functional building blocks, for example machines, in particular machine tools, are attached as a superstructure.

It is known that machine stands, in particular machine tools, are made of concrete or iron concrete. If the machine stand is made of iron concrete, the advantageous feature of the concrete is that the concrete absorbs vibrations very well.

On an iron concrete stand, the metal bodies are either fixed to the feet that are embedded in the concrete or adhere to the concrete. Fans of the building group are then attached to these metal bodies as a superstructure. Fastening of the superstructure is done by bolts anchored in metal bodies, eventually potted in concrete or glued to concrete. In particular, functional groups are fixed to said metal bodies which require high positioning accuracy both with respect to the iron concrete stand and with each other.

Furthermore, it is known that a metal body mounted on an iron concrete stand is formed as a hollow support body which is filled with granular sand, which is then

197 492

197 492 acts as a vibration damper.

A disadvantage of all these known solutions is that a metal body is arranged as an intermediate element between the iron concrete stand and the functional building groups. With this metal partition, the favorable damping properties of the concrete cannot be used to damp the oscillations of the functional building blocks. If the metal part is to function satisfactorily, it has to be made of a quality material, which is expensive and which is to be saved by using an iron concrete stand. Since the metal body used as an intermediate part must have the necessary pressing and connecting surfaces for functional building groups which must be reliably fastened, which requires the metal body to have adequate rigidity, the dimensions of the metal body as an intermediate member must be large. The connection of the metal body to the iron-concrete stand can easily lead to the risk of unwanted loosening, which is caused by the dynamic stresses of the machine.

Concrete and steel and possibly gray cast iron have different coefficients of expansion as well as different behavior at natural frequency. Differences in the coefficients of expansion are reflected in the terms of the eyes of the tropical climatic conditions, which should be taken into account when exporting machines to these countries. The need to securely connect the metal body formed as an intermediate member to the iron concrete stand so that the metal body can only be recovered as scrap by completely breaking the iron concrete stand on which the metal body rests.

The purpose of the invention is to allow the safe connection of functional building blocks to a reinforced concrete stand and to make better use of the damping effect of the concrete, while requiring only a slightly increased cost of the high-quality material required for this purpose. use.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stand of iron boton for fastening functional assemblies, for example machines, in particular machine tools, so that the superstructure can be detachably fastened thereto while maintaining high position accuracy of functional assemblies even during machine operation. with a rack of iron shavings, as well as between individual functional groups, while using the damping capacity of concrete.

According to the invention, this object is achieved by a stand made of concrete or iron concrete for functional assemblies of machine tools according to the invention, which is characterized in that its upper wall is provided with at least one planar, ground grinding and connecting surface protruding. above the level of the upper surface of the upper wall of the rack for detachably fastening the building functional groups, the upper wall of the rack being provided with respective holes for receiving fasteners. The facing and attachment surfaces are formed on a terrazzo layer overlapping the top surface

197 492 of the upper wall of the stand and fixed to it. The teraea layer consists of mortar composed of heavy concrete and deep igneous rocks.

The fastening of the functional building groups as superstructures is carried out as is known, with bolts and loose plates, through the holes provided in the upper wall of the stand and in the teraoa layer on which the flushing and connecting surfaces are formed, or .

Advantages of the construction of the concrete or iron concrete frame according to the invention are that by mounting the functional building blocks on the frame using a metal spacer, the replacement material for machine construction can be considerably better utilized, thereby partially reducing the consumption of metal materials. Further, if the worn out machine is taken to scrap, the fasteners of the functional assemblies can be reused in place, so that these fasteners need to be imported from the factory. It will make use of the concrete damping properties because the functional assemblies are directly mounted on the rack and the high accuracy between them, so that even with the usual fastening of the functional assemblies there is no need to argue about changes in their position on the rack.

The invention is further explained on the example provoděni illustrated in the accompanying drawing, in which Fig. 1 is a plan view of the stand of concrete or of reinforced concrete, without functional structural units Fig.2 CEOS stand ¹ along line A - A of FIG fig 3 metal eyelet, fig. 4 metal eyelet with anti-rotation lock and fig. 5 another metal eyelet design *

The frame 1 made of concrete or iron concrete is designed such that the surfaces a, b on which the functional building blocks need to be fixed protrude to the level of the upper wall 2 of the frame 1.

Since the functional assemblies 3 ae are usually mounted on the upper surface of the upper wall 2 of the rack, it is also necessary for the rack 1 to be made of concrete or of reinforced concrete to form this mounting surface as casting and connecting surfaces a, b. Therefore, the mold for making the concrete stand is arranged such that the flanging and connecting surfaces a, b are formed on the bottom of the mold. Since these lloggling and attachment surfaces a, b are formed on the teraoa layer, the areas of the dnanform are to be filled in which the alignment and attachment surfaces a, b are to be formed with a mortar composed of heavy concrete and an appropriate proportion of the depth of the igneous rock; After that the foroia is filled with betpnea, if necessary by first inserting the appropriate reinforcement, which is poured with concrete, thus forming a stand 1 made of concrete * or iron concrete. 2 of the stand 1 until the flanging and connecting surfaces a, b have the necessary surface quality.

To fasten the functional building blocks 3, eyes 4,5 or eyes 4,5 are poured into the concrete or iron concrete stand 1 in the pre-prepared holes 49,72 with cement milk or other binder.

The metal eye 5 is provided with a bevel 6, which is a lock against rotation when fixing the functional components 3 by screws.

In addition, it is possible to achieve the fixing of the functional components of the groups 8 with one or more screws and a loose plate 8, optionally also with a metal eyelet T provided with a collar 9, which are subsequently inserted into a pre-prepared recess.

Claims (3)

A stand made of concrete or iron concrete for functional groups of machine tools, characterized by the fact that the upper wall (2) is provided with at least one planar ground llolacation and connecting surface (a, b) projecting above the level of the upper surface of the upper wall / 2 (1) for detachably fastening the functional building blocks (3), wherein the upper wall (2) of the stand (1) is provided with respective holes (4 * 7 ') for receiving fasteners. 2. The concrete or iron concrete stand according to claim 1, characterized by the fact that the pouring and connecting surfaces (a, b) are formed on a layer of terrazzo which protrudes from the upper surface of the upper wall (2) of the stand (1) and firmly connected thereto. 3. A stand made of concrete or iron concrete according to claim 2, characterized in that the terrazzo layer consists of a mortar composed of heavy concrete and a deep igneous rock.