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EP3995224A1 - Plaque d'usure et procédé de fabrication de la plaque d'usure - Google Patents

Plaque d'usure et procédé de fabrication de la plaque d'usure Download PDF

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Publication number
EP3995224A1
EP3995224A1 EP21206882.9A EP21206882A EP3995224A1 EP 3995224 A1 EP3995224 A1 EP 3995224A1 EP 21206882 A EP21206882 A EP 21206882A EP 3995224 A1 EP3995224 A1 EP 3995224A1
Authority
EP
European Patent Office
Prior art keywords
wear
plate
elements
wear plate
cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21206882.9A
Other languages
German (de)
English (en)
Inventor
Detlef Bauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP3995224A1 publication Critical patent/EP3995224A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal

Definitions

  • the invention relates to a wear plate and a wear plate manufacturing method.
  • wear protection is a protective layer that covers and protects the wear-prone surface. Instead of completely replacing the machine parts with surface wear, it is sufficient in this case to replace the wear protection regularly or when it is damaged.
  • wear protection is commonly available in the form of wear plates formed from wear material, particularly a polymeric material.
  • elements made of a wear-resistant material can be included or embedded in the wear plate.
  • examples of this are hard metal blocks that are distributed in a grid pattern in the wear plate in order to form a wear-resistant core of the wear plate.
  • such a wear plate can also be damaged relatively quickly. Due to the impact of the bulk material, the wear material is more and more eroded until the wear plate falls apart and the elements of the wear material become detached. There is therefore a continuing need for wear plates which are more durable.
  • the invention is based on the idea of providing each element with a cavity which is originally, ie in the case of a new wear plate, filled with the wear material of the wear plate. If the wear material is removed from the cavity due to the impact of bulk material, then subsequent bulk material can become lodged in the cavity. The fixed bulk material then serves as wear protection in the cavity instead of or in addition to the original wearing material.
  • the wearing plate has a large number of elements of the same construction, which are arranged next to one another along a plane of the plate.
  • the wear plate has a plate thickness that is significantly smaller than the other dimensions of the wear plate, ie in particular than the width and length of the wear plate.
  • the plate plane is a plane perpendicular to the plate thickness, and thus parallel to an impact surface for the bulk material.
  • Each of the elements has a cavity extending from a front to a back of the element. The elements are surrounded by the wear material. Also, the cavity of each element is filled with wear material in such a way that the element cannot slip out from the wearing material is prevented.
  • the cavity has a cross section parallel to the plane of the plate, which changes from the back to the front.
  • the cross section can increase from the back to the front.
  • the cavity may have an undercut when viewed from the rear.
  • An internal thread running along the inner wall of the cavity is also conceivable. The basic idea is that the element is still retained in the wear plate even after the wear material surrounding the element has already been partially removed.
  • the cavity has a recess on the front side of the element and a through-opening reaching up to the recess on the rear side of the element.
  • the recess and the through hole are filled with the wear material.
  • the front of the element is here the side which is located on the front of the wear plate. It is the side where the bulk material hits the wear plate in use. The bulk material therefore partially settles in the recess when the wear material has been removed there by the impact.
  • the through-opening preferably has a smaller cross-sectional area than the recess, which thus forms an undercut of the through-opening when viewed from the rear.
  • the element can be cup-shaped and have a base delimiting the recess and a wall surrounding the recess.
  • the through hole is formed in the bottom.
  • the wall preferably has a wall thickness of at least 1 mm, 2 mm or 3 mm and/or at most 10 mm, 7 mm or 5 mm.
  • the wall is preferably cylindrical.
  • the wearing material expediently fills the recess, the through-opening or the cavity essentially completely. That can mean in particular that with a new wear plate there are no recesses or free spaces in which bulk material can accumulate from the outset.
  • the front of the wear plate should have a flat or smooth surface. While it is not essential that the cavities of the elements be completely filled, at least the filling should reach the front surface of the wear plate.
  • an end face of the element completely surrounding or encompassing the cavity or recess is exposed.
  • this is an end face which is not covered by the wearing material on the front side of the element, preferably as the only surface of the element that is not covered.
  • This circumferential face separates the wear material that fills the cavity from the wear material that surrounds the element.
  • the elements are embedded in the wearing material and are spaced apart from one another by means of the wearing material. In particular, this means that the individual elements do not touch. Due to the bendable wear material, such a wear plate can have a certain flexibility.
  • the wear plate has a plate surface oriented parallel to the plane of the plate, on which the total surface area occupied by all cavities is greater than the total surface area occupied by intermediate spaces between the elements.
  • Said plate surface is the surface on which the bulk material impinges, ie the front of the wear plate described above. This feature means in practice that the bulk material is more likely to encounter wear material in the cavity than wear material in the spaces between the elements.
  • the distance between the elements is preferably less than a wall surrounding the cavity of the element.
  • the element preferably has a width of at most 10 cm or 5 cm and/or at least 0.5 cm or 1.0 cm along the plane of the plate.
  • a base area of the element is expediently at least 3 cm 2 or 5 cm 2 and/or at most 10 cm 2 or 15 cm 2 .
  • the element preferably has a height of at least 3 mm and/or at most 2 cm perpendicular to the plane of the plate.
  • the wearing material is preferably a polymer.
  • the polymer has a Shore A hardness in a range between 15 and 95.
  • the wearing material is expediently made of polyurethane.
  • the elements are preferably made of metal, in particular hard metal, and/or ceramic. Regardless of or in addition to this, edges of the element are preferably rounded, for example with a minimum radius of 0.1 mm. This would have the advantage that the wear material would not be damaged by any sharp edges, which could be particularly important with hard materials such as metal or ceramics.
  • the ceramic can in particular be an aluminum oxide ceramic, preferably with a purity of more than 90%.
  • the structurally identical elements are arranged in a grid pattern along the plane of the plate.
  • this can be a rectangular, square or hexagonal grid.
  • the element can have a round, in particular circular or oval, rectangular or square or approximately rectangular or square base. However, it is preferably provided that the element has a hexagonal base area. In general, its base can be polygonal. If on each side of the polygon, for example on each of the six sides of the hexagonal base, an adjacent element is arranged with one of its sides, then each after arrangement, a rectangular, square or hexagonal grid or grid of elements can be formed along the plane of the plate.
  • a wear plate manufacturing method for manufacturing a wear plate is proposed.
  • a large number of structurally identical elements are first arranged next to one another along a plane of the plate in a mold.
  • the casting mold can be a simple arrangement with a base and wall elements arranged around the base, which are intended to prevent the wear material mass from flowing further.
  • the elements are positioned on the base, preferably fixed to it, for example glued, in order to prevent slipping during loading.
  • the elements are provided already fixed on a base, so that this base only has to be placed in a mould, for example by inserting surrounding walls.
  • the base can be a textile fabric, for example a woven fabric, knitted fabric or warp-knitted fabric, on which the elements are fixed.
  • the mold is then charged with a mass of wear material such that the mass of wear material surrounds the elements and penetrates the cavity of each element.
  • gaps between the elements should be filled or filled up.
  • the elements are preferably also covered during charging. Because the elements are placed face down on the substrate, that is, with the front touching the substrate, the backs of the elements are covered. In the finished wear plate, the elements are thus embedded with their backs in the wear material.
  • the mass of wear material is hardened, so that the wear material with the elements arranged therein is formed from it.
  • the resulting wear plate is then removed from the mold.
  • a holding device can be cast into the wear plate, by means of which the wear plate is fastened to the surface to be protected.
  • a perforated sheet metal plate possibly with welded-on studs, can be arranged there, which is cast together with the elements in the mass of wear material.
  • the element 1 shows an element 1 in a plan view of a front side.
  • the element is cup-shaped and has a hexagonal base. It consists of a bottom 6 and a peripheral wall 7.
  • the wall 7 surrounds a recess 3, while a through opening 4 is formed in the bottom.
  • the recess 3 and the through opening 4 together form a cavity 3, 4 in the element 1.
  • the element has a width of 24 mm and the recess 3 there has a width of 17 mm.
  • the through-opening 4 has a diameter of 7.9 mm.
  • a cross-sectional drawing of the element along line AA in 1 will in the 2 shown. It can be seen here that the passage opening 4 extends through the entire thickness of the base 6 and forms a rear passage to the recess 3 .
  • the front-side arranged face 5 forms the conclusion of the wall 7.
  • In the 3 becomes the element 1 shown in a perspective view.
  • the element 1 has a height of 10 mm, the recess 3 having a height of 7 mm.
  • a larger number of such elements 1 are arranged next to one another in a grid pattern and spaced apart from one another by gaps 8 and poured over with a mass of wear material.
  • the elements are thus arranged in a mold and charged with the wear material mass.
  • the elements 1 are arranged on their end faces 5 .
  • the mass of wear material flows into the gaps 8 and through the through openings 4 into the recesses 3 of the individual elements 1 and fills them.
  • the wearing material mass forms a wearing material which surrounds the elements 1 or in which the elements 1 are embedded.
  • a section of such a wear plate is in the 4 shown with part of the wear material 2 cut away to better show the elements 1 therein. Due to the recesses 3, which each form undercuts for the through-openings 4, the elements 1 are held on the wearing material 2.
  • the end faces 5 of the elements 1 are exposed, ie they are not covered by the wearing material 2 since they were protected by the ground.
  • half elements 11 are necessary in order to complete the wear plate laterally.
  • Such a half-element 11 can result from the fact that an element 1 along the in 1 drawn line AA is severed. Instead of a through-opening 4, however, such a half-element 11 has only one half-hole 41, but that too has an undercut and thus causes the half-element 11 to be fixed in the wearing material 2 .
  • the full wear plate off 4 will in the figure 5 1, also with wear material 2 partially cut away.
  • the wear plate has a length l of at least 10 cm, 25 cm, or 40 cm and a width b of at least 10 cm, 25 cm, or 40 cm.
  • length l and width b are substantially equal to form a substantially square wear plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
EP21206882.9A 2020-11-09 2021-11-08 Plaque d'usure et procédé de fabrication de la plaque d'usure Pending EP3995224A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020129433.6A DE102020129433A1 (de) 2020-11-09 2020-11-09 Verschleißplatte und Verschleißplattenherstellungsverfahren

Publications (1)

Publication Number Publication Date
EP3995224A1 true EP3995224A1 (fr) 2022-05-11

Family

ID=78806247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21206882.9A Pending EP3995224A1 (fr) 2020-11-09 2021-11-08 Plaque d'usure et procédé de fabrication de la plaque d'usure

Country Status (2)

Country Link
EP (1) EP3995224A1 (fr)
DE (1) DE102020129433A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4322113A1 (de) * 1993-05-27 1994-12-01 Knorr Bremse Ag Bremsscheibe für Scheibenbremsen
EP1256403A2 (fr) * 2001-05-11 2002-11-13 Schwäbische Hüttenwerke GmbH Pièce moulée métallique avec d'insert en matériaux durs
WO2019099951A1 (fr) * 2017-11-16 2019-05-23 Berry Metal Company Système de boîtier refroidi par fluide pour instruments d'un four métallurgique
EP3540080A1 (fr) * 2018-03-15 2019-09-18 Primetals Technologies Limited Système de protection de douve

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TR199900645T2 (xx) 1996-10-01 1999-07-21 Fran�Ois Hubert Bile�ik a��nma par�as�.
DE102016106504B3 (de) 2016-04-08 2017-08-10 Detlef Bauer Verschleißplattenherstellungsverfahren und Verschleißplatte
DE102017203076A1 (de) 2017-02-24 2018-08-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verbundwerkstoffe mit sehr hoher Verschleißbeständigkeit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4322113A1 (de) * 1993-05-27 1994-12-01 Knorr Bremse Ag Bremsscheibe für Scheibenbremsen
EP1256403A2 (fr) * 2001-05-11 2002-11-13 Schwäbische Hüttenwerke GmbH Pièce moulée métallique avec d'insert en matériaux durs
WO2019099951A1 (fr) * 2017-11-16 2019-05-23 Berry Metal Company Système de boîtier refroidi par fluide pour instruments d'un four métallurgique
EP3540080A1 (fr) * 2018-03-15 2019-09-18 Primetals Technologies Limited Système de protection de douve

Also Published As

Publication number Publication date
DE102020129433A1 (de) 2022-05-12

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