CS215784B1 - Apparatus for manufacturing cambered roadway surface samples - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a device for the production of roadway or curved road surface samples intended for testing road surfaces or vehicle parts.

Existing equipment for the production of roadway samples with a cylindrical or curved surface consisted of a pit in which a lifting mold has been deposited for making planar samples of road segments and a compaction roller, bending the sample after rolling the planar sample and removing it from the mold by placing it on a curved pad. the self-weight sample was bent and took the shape of a pad. In this process, the structure of the road specimen was disturbed due to deformations, and cracks in the compressed and drawn zones of the material could also occur, thereby reducing the effect of the roadway imitation. Another device consisted of a curved bottom mold in which the pavement material was shut down by ramming using a curved bottom ramming tool that had a poorly desired pavement profile. The pavement specimens made on this device did not achieve the imitation of the real conditions in rolling pavement production. The pavement samples produced in the above installations did not therefore satisfy their quality for the verification tests, in particular for the testing of road surfaces.

The aforementioned drawbacks are eliminated by a device for the production of roadway samples with a cylindrical or curved surface, consisting of a horizontally mounted foundation thatch with vertically mounted pivotable lifting movements on which the mold carrier is movably mounted by means of fixed movement nuts. At least one mold bottom s is supported on the support

215 784

215 784 having at least one projection provided with a curved surface of a section of a cylindrical surface for spore dock road samples in a direction parallel to the axis of the cylindrical surface are on both opposite sides of the projection in the form of an oblique guide, e.g. dovetailed, sloping, sloping mold walls whose inner surfaces on the side of the pavement side are parallel to the oblique guide at the mold bottom, perpendicular to the longitudinal edge of the bottom protrusion and lie in a plane passing through the axis of the cylindrical bottom surface. From the other two opposite sides of the floor protrusion, opposite side walls of the pavement mold are in a direction perpendicular to the axis of curvature of the floor protrusion of the floor protrusion whose horizontal extensions on both sides of the pavement are interconnected by crossbars tsk to form a separate mold frame wiring at the bottom of the mold. In the direction transverse to the axis of the cylindrical surface, on both sides above the base plate, longitudinally extending guide templates for guiding and unwinding the compaction roller, which are displaceably displaceable with the base plate, are arranged horizontally. The contact surface of the stencils and the compaction roller has a curvature in the functional portion, identical to the curvature of the upper surface of the pavement sample.

The device according to the invention perfectly imitates the actual conditions in the production of pavements by rolling. The road structure is not disturbed and samples with undesirable structure are not produced. Road production is simpler and relatively faster than previous equipment. The production of pavements with different curvature of the pavement surface is also possible. The samples produced are of a more even and better quality.

The attached drawing shows schematically an example of a device according to the invention, wherein FIG. 1 shows the device in side section and FIG. 2 is a plan view of a device without a compaction roller.

The exemplary device consists of a horizontally mounted base thatch 2 with vertically mounted rotating lifting movement screws on which the mold carrier 4 is movably mounted by means of fixed movement nuts. The coupled drive bolt drive 11 of the base plate 2 consists of chain wheels mounted firmly on all four movement bolts, a chain and two symmetrically mounted tension rollers. One motion screw is provided kíučnm 2 P ^re synchronous rotation of this and the other for screw. On the carrier swiveling of this and other movement screws. One mold bottom 4 with three projections having a folded cylindrical surface for the bottom of the pavement 1 is supported on the mold carrier 6. In the direction parallel to the axis of the cylindrical surface at the two opposite sides of the projection on the mold? sliding mounted inclined walls 6 of the mold 6. The inner surfaces of the inclined walls 6 on the side of the roadway samples 1 are parallel to the inclined guide at the bottom of the mold 5, perpendicular to the longitudinal edge of the bottom protrusion and lie in a plane passing the surfaces are opposed side walls of the pavement sample 1, the horizontal extensions of which are interconnected by the intersections on both sides of the pavement sample 1 so as to form together a separate frame 2 of the pavement 1, expanding the pavement sample 1 and oblique guides at the bottom. In the direction transverse to the axis of the cylindrical surface of the protrusion of the bottom of the mold 5, on both sides above the base plate 8 and the opening 10 in which 1 the assembly is mounted are horizontally mounted longitudinal guide templates 8 for guiding and rolling.

215 784 is not a compaction roller 2, which are fixedly aligned with the base plate. The contact surface of the templates 8 and the compaction roller 4 in the functional part of the curvature identical to the curvature of the upper surface of the pavement sample 1.

The function of the device is as follows:

The mold carrier J is lowered to the home position. The frame 6 with the mold walls 6 tightly and movably mounted 6 are raised. The mold space 4 over the pavement sample 2 is filled with the pavement sample material. With the key 2, the assembly is lifted as the compacting roll 6 travels simultaneously, thereby gradually compacting the pavement samples 1. The entire process is completed when the desired compaction is achieved. Upon completion of compaction, the frame 4 and inclined walls 6 of the mold 6 are pulled out and set aside, thereby releasing the pavement samples 1 and removing them from the mold 5.

Claims (1)

Rolling or curved roadway pattern specimens, characterized in that it consists of a horizontally mounted foundation plank (2) with vertically mounted rotating lifting movement screws on which the support (3) of the mold (4) is movably supported by means of fixed at least one mold bottom (4) having at least one projection provided with a folded cylindrical surface of the bottom of the road surface (1) on the support (3), the two on the opposite sides of the bottom projection being in a direction parallel to an axis of curvature of a section of a cylindrical surface of an oblique guide, for example dovetail, for the inclined and sliding embedded inclined walls (6) of the mold (4), the inner surfaces of which on the longitudinal edge of the bottom-rim and lie in a plane passing through the axis of the cylindrical surface of the bottom and the opposite side walls of the mold (4) for the road pattern (1), whose horizontal extensions on both sides of the road pattern (1) are interconnected by crossbars to form a separate frame / together in the direction perpendicular to the axis of curvature of the cylindrical surface 5) enclosing the pavement pattern (1) and the inclined guides at the bottom of the mold (4), wherein in the direction transverse to the axis of the cylindrical surface of the bottom protrusion, longitudinal guide templates (8) are horizontally mounted on both sides above the base plate (2) for guidance and rolling The compaction roller (9), which is immovably disposed with the base plate (2), and the contact surface of the templates (8) and the compaction roller (9) has a curvature identical to the curvature of the road surface (1).