FR2887957A1 - PROTECTION AGAINST WEAR FOR A PLATE OF PROTECTION / DEVIATION OR DEFLECTION - Google Patents

Abstract

Protection against wear (20) of a protection / deflection or deflection plate (1) with a steel plate (10) having a stressed front surface (12) and side surfaces (11) separated by edge regions (12.3), the side surface being covered with a side wear protection having on each side surface a wear protection member (21) and on the front surface subjected to the stress a protection against wear on the face formed by a wear protection element (31), the wear protection element for the stressed end surface (31) having an angular section with a front limb (31.1) and a side branch (31.2) and the edge region (12.3) of the steel plate being surrounded by the wear protection member (31). Wear protection is improved with respect to impacts in the edge area.

Description

WEAR PROTECTION FOR A PLATE OF

  The present invention relates to wear protection for a protection / deflection or deflection plate with a steel plate having at least one stressed frontal surface and side surfaces separated by zones of resistance. edges, the lateral surface being at least partially covered by a lateral wear protection having at least one wear protection element at each side surface and at the front surface subjected to stress protection against frontal wear formed by at least one wear protection element.

  Such protection / deflection or deflection plates are for example used for laying tracks in track rehabilitation machines, or they are used for mixer shovels in mixing plants for concrete, cement , gravel, sand, chippings, asphalt or other loose material having an abrasive action.

  These protection / deflection or deflection plates are generally subjected to high mechanical stress and must be equipped with wear protection to ensure the longest possible durability. Hard metal reinforcements are generally used as protection against wear.

  For laying tracks, for example, so-called stuffing peaks used for compacting the ballast are used. The document DE G 9404703.0 describes for example a jam peak or a tamping tool, in particular for attachment to a shaker, which is provided, at least on a portion of its tip, with a hard metal reinforcement of a only essentially V-shaped piece in cross-section.

  DE OS 2924152 describes as another example a wear rail with at least one claw base for the edge of the excavator shovel, where each claw base is formed in one piece with the material. of the wear rail and has devices for the direct attachment of a claw, so that the rail is formed so as to at least surround the front edge of a shovel. These wear rails have a transverse profile that is deformed in a complex manner, which is why their manufacture can be performed only very costly.

  As protection / deflection or deflection plates, according to the state of the art, the stressed front side and the side surfaces of the plate are lined with individual hard metal plates, a steel cross member being formed between the hard-edged hard-side metal frame and the side plates. A groove serves for the simple fixing of the hard metal plate on the front side subjected to stress during welding, which groove is formed by the crosspieces on both sides. The disadvantage of this is that the crossbar between the hard metal plates is softer, and thus wears out more than the hard metal plates. This greater wear results in scouring, thus forming a leading surface for coarse materials, for example larger crushed stones. This can cause breakage and / or bursting of the hard metal plates in the impact zone and / or edges.

  Configurations are also known, which can be dispensed with by the transom described above. It is true that with such protection against wear, the danger of scouring is lower; However, there is still a significant stress on the edges at the level of the hard metal transitions in the zone of edges. It is also disadvantageous that the welding is more expensive by omitting the groove, since the guiding is missing.

  Therefore, the purpose of the invention is to provide a wear protection of the kind mentioned in the preamble, with which the protection against wear of the protection / deflection or deflection plate is improved, and where the durability is prolonged.

  This object is achieved in that the wear protection element for the stressed front surface has a transverse profile substantially similar to an angle with a front-end branch and a side branch, and that the edge of the steel plate is at least partially surrounded by the wear protection element. In this way, the transition between the lateral wear protection and the frontal wear protection is no longer in the area particularly subject to the impacts of the protection / deflection or deflection plate. This displacement of the transition zone has the consequence that scours can be significantly reduced and that more particularly coarse particles can not penetrate more between the individual elements of protection against wear. Thanks to this measure, the durability of the protection / deflection or deflection plates can be significantly prolonged, with in particular repercussions with regard to a reduction of maintenance costs. Another advantage is the assembly. The positioning during welding is simplified by the angular transverse profile, particularly in case of overlap and / or coating on several sides of the protection plate / deflection or deflection with wear protection elements.

  If the front side branch and the side branch of the wear protection element are made with equal branches, the advantage lies in the fact that it is not necessary to take account of the orientation during mounting.

  According to a preferred embodiment, the branch on the front side and the side branch of the wear protection element have different lengths. This is advantageous with regard to the packing of different steel plates, since with the same wear protection element, it is possible to fill steel plates of different widths, without the need to manufacture another element. protection against wear.

  According to another preferred embodiment, the wear protection element has, between the branch of the frontal side and the lateral branch, an outer rounding zone. This has the advantage that larger particles, for example larger crushed stones, can slide along the front side of the protection / deflection or deflection plate, the impact and pressure force thus being reduced. Another advantage lies in the fact that the effort required to move the protection / deflection plate or deflection in the bulk material is less important. The introduction of the protection plate / deflection or deflection in the ballast is for example simplified by the rounded edges of the wear protection elements.

  In another embodiment, the stressed front side of the steel plate may be rounded, and the wear protection member may have a geometrically corresponding inner rounding area. In this case it is advantageous that the cross section of the material of the wear protection elements can remain identical. With this geometry, the weakening of the materials is avoided, which would otherwise result in breaking points. With regard to the forces in action, these are distributed more evenly on the frontal side subjected to the constraint.

  According to a preferred embodiment, the wear protection element is formed as a quarter-circle profile piece. These can be manufactured at a particularly advantageous cost.

  According to another also preferred embodiment, the lateral surface of the steel plate may have at least one chamfering in the edge zone, whereby the angle between the lateral surface and the frontal surface subjected to the stress is greater than 90 and the wear protection element has a geometrically corresponding internal contour. In this case it is particularly advantageous that the introduction of the protection plate / deflection or deflection in bulk material is simplified by chamfering.

  If at least one of the branches of the wear protection element has, in the region of the free end of the branch outwards, a chamfer extending transversely to the longitudinal extent of the branch, advantage obtained lies in the fact that, on the one hand, the transition between the wear protection elements for the stressed front side and the wear protection elements of the side surfaces can be made chamfered , which can reduce mechanical stress in this area. Thanks to this chamfering, the edges of the wear protection elements are, on the other hand, better protected against conchoidal recesses and crevice infiltrations.

  According to one embodiment, it is possible to provide that the thickness of the material of the wear protection element covering the front surface subjected to the stress is greater than that of the wear protection element. covering the lateral surface. The advantage lies in the fact that, in particular at places subject to greater stress, there is more material available as protection against wear, and that the durability can thus be extended.

  According to a variant of the embodiment, the ratio between the number of wear protection elements for protection against frontal wear and the number of wear protection elements for protection against lateral wear is at less than 2: 1. The particularly stressed area of the protection / deflection and deflection plates can thus be packed with several smaller wear-protection elements, compared to the lateral surfaces subjected to a less important constraint. If despite the measures just described, there should still be a bursting of a wear protection element, with this arrangement, only smaller areas would be affected, so that the function of the plates of protection / deflection and deflection can always be guaranteed. It is also easier to replace smaller wear protection elements.

  The deflection / deflection plates with wear protection according to the features just described can be used preferably for laying tracks in track rehabilitation machines, or as and mixer shovels and / or deflection plates in mixing plants for concrete, cement, gravel, chippings, sand, asphalt and / or other loose materials having an abrasive effect. For this type of use, long durability is particularly important, which can be guaranteed by virtue of the characteristics of the wear protection just described.

  The invention is explained in more detail in the following with the aid of an exemplary embodiment 20 shown in the figures. It is possible to see: in FIG. 1, in perspective representation, a protection / deflection or deflection plate with a protection against wear according to the state of the art; in Figure 2, in perspective representation, another embodiment of a protection plate / deflection or deflection with wear protection according to the state of the art; in Figure 3, in perspective representation, a protection plate / deflection or deflection with a wear protection according to an arrangement according to the invention; in FIGS. 4a and 4b, a protection / deflection plate or deflection plate in a perspective view; in FIG. 4c, the plate for detecting / deflecting or deflecting in a side view; in Figure 4d, the plate protection / deflection or deflection in a front view; in Figure 5a, a wear protection member in a side view; in Figure 5b, the wear protection element in a front view; in Figure 6a, a variant of the wear protection element in a front view and in Figure 6b, another variant of the wear protection element in a front view.

  FIG. 1 shows a protection / deflection or deflection plate 1 with wear protection 20, 30, 40 according to the state of the art, such as they are used, for example, for laying tracks in machines of track rehabilitation for the distribution of the ballast.

  In the example shown, the protection / deflection or deflection plate 1 consists of a steel plate 10 which, as shown in FIG. 1, is bent at the end.

  The steel plate 10 has at least one front surface 12 stressed and joined to it, respectively separated by a zone of edges 12.3, from the side surfaces 11. The side surfaces 11 are at least partially covered respectively by one-piece side-wear protection 20 and the front surface 12 subjected to stress by a one-piece frontal wear protection. The steel plate 10 also has yet another front surface 13, which is at least partially covered by a protection against wear of the edges 40.

  Between the front wear protection 30 made as a hard metal armature of the stressed front surface 12 and the side wear protection 20 of the side surfaces 11, a cross member 12.2 is respectively formed. For easier attachment of the frontal wear protection 30 to the frontal surface subjected to stress 12 during welding, a groove 12.1 is provided. In this case, the disadvantage lies in the fact that, as previously described, the crossbar between the wear protection 20, 30 is softer, and can therefore more easily wear than the wear protection 20 , 30.

  The protection plate / deflection or deflection 1 shown in Figure 2 also corresponds to the state of the art. With respect to the variant shown in FIG. 1, the latter consists of a substantially flat steel plate 10 having lateral surfaces 11, end surfaces 13, and at least one front surface subjected to stress. head 14 is formed in one piece on the steel plate 10 in the illustrated example, which has a pivot axis 15 around which the steel plate 10 can be pivoted.

  The side surfaces 11 of the steel plate 10 are at least partially lined with side-wear protection 20, which consists of several segmented wear-protection elements 21 in the illustrated example. The stressed front surface 12 is provided with a front wear protection 30, which is segmented and consists of a plurality of wear protection members 31. As can be seen in FIG. 22 between the wear protection elements 21, 31 is in the area of the greatest mechanical stress. The front surface 13 of the steel plate 10 has, at least in the area of junction with the stressed front surface 12, a wear-resistant edge protection 40, which consists of a protective element against 41 wear chamfered on both sides.

  The head 14 of the protection plate / deflection or deflection 1 has a radial wear protection 50, which at least partially surrounds the head 14. The front surface of the head 14 is lined with a protection against wear axial 60, which consists of several different partial segments.

  Figure 3 shows a pivoting plate / deflection or deflection 1 according to an arrangement according to the invention. In contrast to the protection / deflection or deflection plate 1 shown in FIG. 2, this embodiment has wear protection elements 31 for the stressed front surface 12, which have a substantially angular cross-section with a branch 31.1 of the front side and a side branch 31.2 and at least partially surround the edge region 12.3 of the steel plate 10. The wear protection elements 31 have, between the branch of the front side 31.1 and the branch lateral 31.2, an outer rounding area 31.5.

  An embodiment not shown has, in place of the outer rounding area 31.5, chamfering in the form of a chamfer.

  The ratio between the number of wear protection elements 31 of the front wear protection 30 and the number of wear protection elements 21 of the side wear protection 20 is at least the order of 2: 1.

  The front surface 13 of the steel plate 10 also has, in the zone of junction with the stressed frontal surface 12, a protection against the wear of the edges 40, which consists of a protective element against the wear 41 chamfered on both sides. In addition there are protection elements against wear of the angles 42, which at least partially surround the lateral surfaces 11.

  Figures 4a to 4d show in section a protection plate / deflection or deflection 1 with a steel plate 10, in different views.

  The steel plate 10 has side surfaces 11, which are respectively lined with a side wear protection 20. The front wear protection 30 is formed of a plurality of angular wear protection members 31, whose branches the front end 31.1 and the side branches 31.2 surround the edge region 21. 3 between the side surfaces 11 and the end faces stressed 12 of the steel plate. In the illustrated example, the front end leg 31.1 and the side leg 31.2 of the wear protection member 31 have different lengths. The stressed front end 12 of the steel plate 10 is provided with a rounding 12.5 respectively at the edge region 12. 3. The wear protection member 31 has a rounding zone geometrically corresponding inner end 31.6, whereby the wear protection elements 31 have, between the front end leg 31.1 and the side leg 31.2, an outer rounding area 31.5. The thickness of the material of the two branches 31.1, 31.2 is made to be the same.

  In the illustrated example, the thickness of the material of the wear protection element 31 covering the stressed front surface 12 is made larger than that of the protection element against the wear 21 covering the lateral surface 11. The branches 31.1, 31.2 of the wear protection element 31 have a chamfer 31.3, 31.4 in the region of the free end of the branch 31.1, 31.2 towards the outside. extending transversely to the longitudinal extent of the branches. The transition 22 between the side wear protection 20 and the front wear protection 30 is chamfered by the bevel 31.4.

  Figures 5a and 5b show a wear protection element 31 in enlarged representation. As can be seen in FIG. 5b, the branch 31.1, 31.2 of the wear protection element 31 is provided, in the region of the free end of the branch 31.1, 31.2 on the outside, of a chamfer 31.3, 31.4 extending transversely to the longitudinal extent of the branch, which, in the example shown, is chamfered by about 30 relative to the area of the branches 31.1, 31.2. We can also recognize in Figure 5b the outer and inner rounding areas 31.5, 31.6.

  FIG. 6a schematically shows an alternative embodiment of a wear protection element 31. The lateral surface 11 of the steel plate 10 has in the zone of edges at least one chamfering 12.4, whereby the angle between the lateral surface 11 and the stressed frontal surface 12 is greater than 90. The wear protection element 31 is adapted accordingly with regard to the geometry of the corresponding inner contour and can surround the front surface 12 with chamfering 12.4 in one piece or in two parts. The chamfering 12.4 can be made on one side, on both sides asymmetrically or on both sides symmetrically, as shown in the example.

  Figure 6b shows another alternative embodiment of a wear protection element 31, which is formed as a quarter-circle profile. The steel plate 10 is provided with a rounding 12.5 corresponding to the inner rounding area 31.6.

  The wear protection elements 21 and the wear protection elements 31 are generally made of hard metal and are welded to the steel plate 10. In certain defined use cases, connections may also be envisaged. normal welding or collages.

  In an embodiment not shown here, the wear protection elements 31 of the front wear protection 30 may also have a substantially mushroom-shaped cross section. To do this, a groove is milled on the front surface subjected to the stress 12 of the steel plate 10 of the protection / deflection or deflection plate 1, groove in which the wear protection element 31 is welded. .

  The protection / deflection or deflection plates 1 which have just been described are for example used for laying tracks in track rehabilitation machines, or as kneading shovels and / or as slabs. deflection in mixing plants for concrete, cement, gravel, chippings, sand, asphalt and / or other loose abrasive materials.

  With the variants shown, the protection against wear of the protection / deflection or deflection plate 1 can be significantly improved from the point of view of the impacts in the zone of edges 12.3 of the frontal surface subjected to the stress 12 of the This makes it possible to significantly increase the durability of the protection / deflection or deflection plate, whereby it is possible to lengthen the periodicity of the maintenance and to reduce the costs.

  Of course, the invention is not limited to the embodiments described above and shown, from which we can provide other modes and embodiments, without departing from the scope of the invention.

Claims (11)

  1. Wear protection for a protection / deflection or deflection plate (1) with a steel plate (10), which has at least one stressed front surface (12) and side surfaces (11) separated by edge regions (12.3), the lateral surface (11) being at least partially covered by a lateral wear protection (20), which at each side surface (11) has at least one protection against wear (21) and at the front surface subjected to stress (12) front wear protection (30), which is formed by at least one wear protection element (31) , characterized in that the wear protection member (31) for the stressed front surface (12) has a substantially angular transverse profile with a front-end leg (31.1) and a lateral leg (31.2). , and in that the zone of edges (12.3) the steel plate (10) is at least partially surrounded by the wear protection element (31).   Wear protection according to Claim 1, characterized in that the front side limb (31.1) and the side limb (31.2) of the wear protection element (31) are made with equal limbs. .   Wear protection according to Claim 1, characterized in that the front-end limb (31.1) and the side limb (31.2) of the wear-protection element (31) have different lengths.   Wear protection according to one of Claims 1 to 3, characterized in that the wear protection element (31) has between the front side branch (31.1) and the side branch (31.1). 31.2), an outer rounding area (31.5).   Wear protection according to one of Claims 1 to 4, characterized in that the stressed front side (12) of the steel plate (10) has a rounding (12.5), and in that the wear protection element (31) has a geometrically corresponding inner rounding area (31.6).   Wear protection according to one of Claims 1 to 5, characterized in that the wear protection element (31) is designed as a quarter-circle profile.   Wear protection according to one of Claims 1 to 4, characterized in that the lateral surface (11) of the steel plate (10) has at least one chamfering (12.4) in the area of edges, whereby the angle between the side surface (11) and the stressed front surface (12) is greater than 90, the wear protection member (31) having a corresponding inner contour of the point geometric view.   Wear protection according to one of Claims 1 to 7, characterized in that at least one of the branches (31.1, 31.2) of the wear protection element (31) has, in the area from the free end of the branch (31.1, 31.2) to the outside, a chamfer (31.3, 31.4) extending transversely to the longitudinal extent of the branch.   Wear protection according to one of Claims 1 to 8, characterized in that the material thickness of the wear protection element (31) covering the stressed end surface (12) ) is larger than that of the wear protection element (21) covering the lateral surface (11).   Wear protection according to one of Claims 1 to 9, characterized in that the ratio of the number of wear protection elements (31) of the wear protection (30) and the number of wear protection elements (21) of the lateral wear protection (20) is at least of the order of 2: 1.   Wear protection according to one of Claims 1 to 10, characterized in that the protection / deflection or deflection plates (1) are used for laying tracks in track rehabilitation machines. , or as mixer shovels and / or as deflector plates in mixing plants for concrete, cement, chippings, sand, asphalt and / or other bulk materials having a abrasive effect.