Wear protection components with localized stress relief zones

Abstract

A wear protection component includes an elastic material layer (12) and a reinforcing support (14). The elastic material layer (12) is bonded to the reinforcing support (14), and the wear protection component is bent into a curved shape. In a region defined by the outer periphery of the reinforcing support (14), the wear protection component includes one or more local stress relief regions (16, 17) in which the elastic material layer (12) is not bonded to the reinforcing support (14).

Description

Technical Field

[0001] This invention relates to wear protection components for various applications (e.g., in the mining industry) and corresponding manufacturing methods. One possible application area for wear protection components is crushers, such as the rotary crushers and cone crushers to which this invention also relates.

[0002] Crusheres such as cone crushers and rotary crushers are rock crushing systems that typically crush rocks, stones, ores, or other materials in a crushing gap between a fixed part of the crusher frame and a moving crushing head. The crushing head rotates about a vertical axis within a fixed housing that is part of the crusher frame. To transmit rotational motion to the crushing head, the crushing head is assembled, for example, around an eccentric member that rotates about a fixed axis. The eccentric member can be driven by a pinion and a countershaft assembly.

[0003] The rotational motion of the crushing head relative to the stationary shell crushes rocks, stones, or other materials as they travel through the crushing gap. The crushed material exits the crusher through the bottom.

[0004] As the material passes through the crusher and is crushed in the crushing gap, certain structural components within the crusher (including, for example, the inner wall of the bottom shell of the crusher frame located below the actual crushing chamber) will experience extensive wear.

[0005] Similar wear phenomena occur in a variety of other applications in the mining industry and other sectors. Examples include grinding mills, conveyor systems, and truck beds, to name just a few. Background Technology

[0006] In traditional equipment such as mining equipment, structural components subjected to wear are made of steel or clad in steel. If the wear reaches a certain level, the worn parts are replaced, or the steel lining is replaced.

[0007] A protective liner for a crusher is known from WO 2017 / 174147 A1, wherein the protective liner is removably fitted inside the crusher. The protective liner includes a layer of elastic material and wear-resistant inserts held by the layer of elastic material.

[0008] Other ceramic-rubber composites are known in the art, for example from US 3,607,606, which discloses composites of natural or synthetic rubber and alumina-based ceramics that can be used as wear-resistant liners for ball mills, conveyors, chutes, etc. This composite includes a rubber layer having closely spaced alumina-based ceramic molded bodies embedded therein and bonded to its surface.

[0009] WO-A1-2006 / 132582 also relates to wear-resistant lining elements for use on surfaces subjected to wear, and these elements have outwardly pointing surfaces on which material in fragment or particulate form (such as crushed ore and crushed rock material) will move. Inclined chutes and truck platforms are mentioned as examples. Wear-resistant lining elements comprise an elastic material primarily suited to absorb impact energy and wear-resistant components primarily suited to resist wear. These are preferably made of ceramic materials.

[0010] According to WO-A1-2008 / 087247, similar composite materials are used for wear parts of vertical shaft impact machines, such as distributor plates.

[0011] Commercial solutions branded as Trellex Poly-Cer include wear plates (“Poly-Cer” plates) made of polymer materials and wear-resistant inserts, combined with steel reinforcement plates. This liner is manufactured by vulcanizing the polymer material with ceramic inserts and a steel plate to obtain a flat liner. Certain Poly-Cer products can be bent into desired shapes and curvatures: the steel backing plate provides the opportunity to bend the liner to an application-specific radius of curvature. Summary of the Invention

[0012] The purpose of this invention is to improve the durability of wear protection components.

[0013] This objective is achieved through the wear protection component, manufacturing method, and crusher described in the technical solution of this invention.

[0014] The wear protection component requiring protection includes a layer of elastic material and a reinforcing support. The elastic material is bonded to the reinforcing support, and the wear protection component is bent into a curved shape. In the region defined by the outer periphery of the reinforcing support, the wear protection component according to the invention includes one or more localized stress-relief regions in which the elastic material is not bonded to the reinforcing support.

[0015] This invention is based on the discovery that, under certain conditions, post-bending of such components (i.e., bending after the elastic material has been vulcanized to the reinforcing support) generates strain stress in the elastic material. To reduce this strain stress and thus improve the durability of the component, this invention provides a localized stress-relief region by forming a discontinuous bond between the elastic material and the reinforcing support. This stress-relief region reduces internal structural strain stress by allowing the elastic material to move to a certain extent relative to the reinforcing support, thereby mitigating localized stress factors within the wear-prone component.

[0016] Elastic materials can be vulcanized into reinforcing supports.

[0017] One or more localized stress relief areas may include areas where the elastic material is prevented from bonding (e.g., vulcanization) to the reinforcing support.

[0018] In one embodiment, one or more localized stress relief regions include one or more through openings formed in the reinforcing support. These can be a series of openings in a pattern or array. In the opening regions, the elastic material is not bonded to the reinforcing support. The number and size of the openings are determined by application-based factors, including the total thickness of the component.

[0019] Since the most significant stress relieved by the local stress relief region occurs at the straight edge of the component, the number and / or size of the local stress relief region can be increased toward the straight edge of the component.

[0020] The reinforcing support can be a steel sheet or plate bent into a curved shape.

[0021] Elastic materials can be polymeric materials, particularly elastic materials, such as rubber, isoprene, polybutadiene, butadiene, nitrile, ethylene, propylene, chloroprene, or silicone rubber or mixtures thereof, including up to 30% by volume of impurities, fillers, or auxiliary materials.

[0022] The elastic material layer may also include a wear-resistant insert made of, for example, ceramic, which is held in place by the elastic material, wherein the outwardly pointing outer surface of the wear-resistant insert forms part of the wear surface of the wear protection component.

[0023] In such an embodiment, the aforementioned stresses in the elastic material (especially those towards the edges) result in less elastic support for the wear-resistant insert, making it prone to breakage upon impact. Therefore, reducing the stresses in the elastic material advantageously improves the impact absorption capacity of the wear-resistant insert.

[0024] Inserts can be metallic or ceramic inserts, or made of ceramic-metal (“cermet”) composites. If metallic, they can be iron-based metals comprising 10 to 40 volume percent of metal carbides or oxides. If ceramic, they can consist of carbides or oxides of metallic elements such as aluminum, titanium, tantalum, tungsten, chromium, or zirconium, or mixtures thereof. If cermet, they can include carbides or oxides of metallic elements such as aluminum, titanium, tantalum, tungsten, chromium, or zirconium, or mixtures thereof, and a metallic binder that is a common metal or metal alloy and has cobalt, nickel, or iron as a major component of the binder.

[0025] Wear-resistant inserts can be arranged in rows on the outward-facing surface of the elastic material layer. Each second wear-resistant element can be offset relative to the adjacent wear-resistant element in the same row.

[0026] The ratio of the elastic material to the wear-resistant inserts depends on the wear conditions and the attachment method and location of the protective liner within the crusher. According to one embodiment, the wear-resistant inserts can be arranged and distributed around the elastic material layer such that the outward-facing surface of at least one region of the protective liner is primarily composed of wear-resistant components.

[0027] Wear-resistant inserts can be attached to elastic materials by vulcanization (e.g., by vulcanizing ceramic inserts into polymer-based materials). Optionally or additionally, wear-resistant inserts can be mechanically retained within the elastic material by press fitting and / or form fitting.

[0028] Generally, the combination of wear-resistant (e.g., ceramic) elements and elastic (e.g., rubber) layers is advantageous because ceramics are primarily suited to compensating for sliding or abrasive wear, while rubber is primarily suited to compensating for impact wear. Therefore, the protective liner of this invention provides a longer wear life than conventional steel liners. The reduction in wear will also reduce downtime required to replace worn components.

[0029] In the field of wear protection components, a specific elastic material, trademarked Trellex Poly-Cer, is known to include such an embedded ceramic insert. In this material, high-quality ceramic exhibits high wear resistance, and the elastic rubber effectively absorbs impact loads. Compared to conventional materials, this material offers the following advantages:

[0030] High-quality ceramics are more wear-resistant.

[0031] Rubber absorbs impact loads and reduces noise.

[0032] Lightweight and easy to operate.

[0033] In wear protection components, the reinforcing support may have the same or substantially the same dimensions as the elastic material layer, or its shape and dimensions may be designed to support only a portion of the elastic material layer, i.e., at least one peripheral region of the elastic material layer may extend beyond the outer periphery of the reinforcing support.

[0034] The present invention also provides a method for manufacturing a wear protection component. The method includes the steps of: providing a reinforcing support; bonding a layer of elastic material to the reinforcing support to obtain a wear protection component; and bending the wear protection component into a curved shape. In a region defined by the outer periphery of the reinforcing support, one or more localized stress-relief regions are formed in the wear protection component, wherein the elastic material is not bonded to the reinforcing support in the localized stress-relief regions.

[0035] Thanks to the localized stress relief region, the component can be bent backward (i.e., after the elastic material layer is bonded to the reinforcing support) without causing excessive stress and strain in the elastic material layer.

[0036] In the claimed method, bonding an elastic material to a reinforcing support may include vulcanizing the elastic material to the reinforcing support.

[0037] Forming one or more localized stress relief zones may include locally preventing elastic material (e.g., by vulcanization) from bonding to the reinforcing support.

[0038] Forming one or more localized stress relief regions may also include forming one or more through holes in the reinforcing support before or after bonding the elastic material layer to the reinforcing support and before or after forming the bent portion.

[0039] In one embodiment, the polymer-ceramic liner is manufactured as a flat sheet having a wear surface comprising, for example, ceramic inserts in a symmetrical matrix form, and reinforcing steel plates on opposite sides. After the polymer-ceramic layers are bonded to the steel plates by vulcanization, the sheet is post-bent to an application-related radius of curvature. Localized stress-relief areas are configured as localized holes in the steel plate, forming a discontinuous attachment surface between the resilient material and the steel plate.

[0040] The present invention also provides a rock crusher, which includes a frame and a crushing head, wherein the crusher further includes one or more wear protection components as described above.

[0041] The rock crusher of the present invention may be, for example, a rotary crusher or a cone crusher.

[0042] Wear protection components can be installed in specific locations within the crusher. They can be designed to protect the frame, drive shaft or countershaft, and / or the crusher's arm or crossbeam. Wear protection components can be installed, for example, by welding or using bolts or any other method known per se.

[0043] In addition to being used in actual crushers, the wear protection component according to the present invention can also be used on the feed chute of a crusher, or at the feed point of a bottom conveyor (where the crushed material terminates).

[0044] The wear protection component according to the present invention can be found in many other applications in the mining industry and other fields. Grinding mills, conveyor systems, and truck bodies are mentioned as exemplary applications. Attached Figure Description

[0045] Referring to the accompanying drawings, the above and additional objects, features, and advantages of the invention will be better understood from the following illustrative and non-limiting detailed description of preferred embodiments, wherein like reference numerals will be used for similar elements, wherein:

[0046] Figure 1 This is a schematic partial perspective view of a cone crusher equipped with a wear protection component according to the present invention.

[0047] Figure 2a This is a three-dimensional front view of the lining before it is bent.

[0048] Figure 2b This is a three-dimensional rear view of the lining before it is bent.

[0049] Figure 3a This is a three-dimensional front view of the lining after it has been bent into the shape of a protective lining.

[0050] Figure 3b This is a three-dimensional rear view of the lining after it has been bent into the shape of a protective lining.

[0051] Figures 4a-4d This is a schematic diagram illustrating the behavior of the elastic material layer of the wear protection component of the present invention when bent.

[0052] Figure 5a This is a three-dimensional front view of another liner before it is bent.

[0053] Figure 5b This is a three-dimensional rear view of the lining before it is bent.

[0054] Figure 6a This is a three-dimensional front view of the lining after it has been bent into the shape of a protective lining.

[0055] Figure 6b This is a three-dimensional rear view of the lining after it has been bent into the shape of a protective lining.

[0056] Figure 7a and Figure 7b This is yet another three-dimensional front and rear view of the protective lining.

[0057] Figure 8a and Figure 8b These are three-dimensional front and rear views of the auxiliary shaft box protection device used in crushers.

[0058] Figure 9a and Figure 9b These are three-dimensional front and rear views of the arm protection device used in crushers. Detailed Implementation

[0059] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0060] Figure 1 This is a schematic partial perspective view of a cone crusher. The crusher includes a frame, which includes a base shell 2. The crushing head is mounted on a vertically extending main shaft (neither shown). The main shaft is mounted within a central hub 4 at its lower end. The main shaft is connected to the crushing head at its upper end.

[0061] The operating mode of a cone crusher is known and will not be described in detail here. The material to be crushed is fed through the top of the crusher and is crushed in the crushing gap between the outer surface of the crushing head and the inner surface of the surrounding mantle. The crushed material is discharged from the bottom of the crusher. Exemplary crushers known in the art are the Nordberg HP and Nordberg MP cone crushers, including the MP1000 and MP800.

[0062] During operation, the crushing head performs a rotary motion. A drive shaft or secondary shaft 6 is arranged to transmit this rotary motion to the crushing head. The secondary shaft 6 is surrounded by a secondary shaft housing (also called a secondary shaft box). In the area where the drive shaft 6 is exposed to material that has passed through the crushing gap, the secondary shaft box surrounds the drive shaft 6 at least from above. The secondary shaft box terminates at a first collar (visible in the figure) adjacent to the central hub 4 and a second collar (not shown here) adjacent to the frame.

[0063] According to the present invention, Figure 1 The cone crusher shown in the middle section is equipped with wear protection components in the form of protective linings and guards to protect surfaces inside the crusher that are subject to wear due to contact with the material being processed within the crusher. Specifically, in this embodiment, the wear protection components are designed to protect the crusher's frame, drive shaft, and crossbeams or arms.

[0064] According to the invention, the wear protection component is provided along the inner circumferential surface of the bottom shell 2. Figure 1 The protective lining, indicated by "A", is provided in the form of segments or concave plates arranged adjacent to each other along the inner circumference of the crusher shell 2. Depending on the type and size of the crusher, one or more rows of lining A may be provided.

[0065] The wear protection component according to the invention is also provided in the sub-shaft housing as part of the sub-shaft housing protection device "B".

[0066] The additional wear protection component according to the invention forms part of the arm protection device "C" of the crusher.

[0067] Each protective liner and protective device includes an elastic material layer having a wear-resistant insert embedded at least in a surface area forming a wear surface. Each wear-resistant insert has an outwardly pointing surface that forms part of the wear surface of the protective liner or protective device. The remainder of each wear-resistant insert is immersed in the elastic material layer. As mentioned above, the elastic material layer can be a polymer layer, and the wear-resistant component can be a ceramic insert. One possible embodiment is a layer made of a composite polymer-ceramic material. Therefore, the wear surface of the protective liner is also referred to below as the "polymer-ceramic layer".

[0068] According to the present invention, each wear protection component includes a localized stress relief region to reduce internal strain stress in the elastic material layer, thereby improving the durability of the component. This will now be explained in detail with reference to the remaining figures.

[0069] Figure 2a and Figure 2b These are used to manufacture typically the types described above and in Figure 1 The protective lining sheet is shown in perspective front and rear views at index 10. The lining sheet is from... Figure 2a and Figure 2b The initial planar shape shown is transformed into a curved shape, which adapts to the curvature of the structure within the crusher. The resulting protective lining will be fixed to the crusher (e.g., fixed inside the base shell 2, as shown). Figure 1 shown). Figure 3a and Figure 3b These are perspective front and rear views of the liner 10 after the sheet has been bent into the desired shape. Such liners 10, arranged in rows or arrays, will be replaceably mounted to the crusher in a manner known per se.

[0070] As is known per se, the lining 10 includes a layer of elastic material 12 providing a wear surface and a steel plate 14 serving as a reinforcing support. The elastic material 12 is vulcanized onto the steel plate 14. In the embodiment shown herein, the steel plate 14 has substantially the same dimensions as the layer of elastic material 12, thus providing overall support and reinforcement to the layer of elastic material 12. The elastic material 12 also extends around the circumferential edge of the steel plate 14.

[0071] Ceramic inserts 18 are embedded in the layer of elastic material 12 on the side providing the wear surface: each wear-resistant insert 18 has an outwardly pointing surface that forms part of the wear surface of the protective liner 10. The remainder of each insert 18 is immersed in an elastic (e.g., rubber) material. In the installed state of the component, this side constitutes a wear surface facing the interior of the crusher to expose it to material passing through the crusher. The layer of elastic material 12 is bonded to the support steel plate 14 on the side opposite to the ceramic inserts 18.

[0072] To provide a localized stress-relief area for the liner 10 in the region defined by the outer periphery of the steel plate 14, the steel plate 14 is provided with a pattern of through openings. In this embodiment, the steel plate 14 exemplarily includes circular through-holes 16 along one straight longitudinal edge 11 of the liner 10 and located in a region extending inward therefrom, and slit-shaped through-holes 17 along another straight longitudinal edge 11 of the liner 10. The circular through-holes 16 are distributed such that the number of holes along the edge 11 is greater than the number of holes in the region more towards the center of the plate. In other words, the number of holes 16 increases toward the edge 11 in a direction following the curvature. In this embodiment, there are no through-holes in the longitudinally extending central region of the plate.

[0073] The through opening can be any shape, such as polygon, square, triangle, circle, ellipse, rectangle or a combination thereof.

[0074] Instead of providing through holes to the steel plate 14, or in other ways besides providing through holes to the steel plate 14, local stress relief areas can be formed in other ways (e.g., by locally preventing the elastic material from vulcanizing into the steel plate).

[0075] refer to Figures 4a-4d The behavior of the layers of elastic material 12 and the reinforcing support plate 14 of the wear protection component can be best understood during post-bending (i.e., bending after the elastic material 12 is bonded to the steel plate 14).

[0076] Figure 4a Wear protection components (such as) Figures 2a-3b A schematic cross-sectional view of the protective lining after vulcanization and bending. The steel plate 14 of the component is provided with through holes 16, forming localized stress relief areas. The component shown herein is sectioned in a plane perpendicular to its thickness, with the sectioning plane cutting through two through holes.

[0077] The bending process causes an exponential increase in the strain-stress field within the polymer material of the component. The steel plate and ceramic insert matrix exhibit different behavioral properties, and misalignment occurs between the central location of the ceramic insert and its equivalent location on the steel plate. The strain-stress in the polymer material reduces the durability of the polymer-ceramic liner: the strain-stress field decreases the impact absorption capacity of the ceramic insert. The bending effect generates a rotational effect on individual inserts, moving them towards their natural sheet form. This rotational behavior significantly increases the strain-stress effect between the inserts on the matrix and the thin polymer bonded between them. The rotational behavior decreases as the lost impact absorption capacity is restored due to the strain-stress relief mechanism.

[0078] exist Figure 4b middle( Figure 4b yes Figure 4a(In the enlarged view) arrow D is added to show the dislocation strain within the polymer material 12. The thicker the arrow, the greater the dislocation strain. Dislocation strain results in less elastic support for the ceramic insert, making it prone to fracture upon impact. The centerline c of the ceramic insert 18 and the corresponding equivalent position e on the steel plate 14 are also specified.

[0079] from Figure 4b It is evident that the strain is reduced in the region of through-hole 16. This is because, in these regions, the elastic material is not bonded to the steel plate, thus allowing for some degree of movement relative to the steel plate. During bending, the surface of the polymer material in the region of localized hole 16 stretches inward, forming a cup shape. This cupping effect is a result of strain and stress relief factors within the polymer material.

[0080] Figure 4c and Figure 4d The same phenomenon is shown again, using a grid to indicate the deformation of the elastic material layer.

[0081] from Figures 4a-4d It is also evident that the stress in the elastic material layer occurs particularly towards the edges of the component, while no stress occurs in the central region of the component around the centerline C, where no force acts on the elastic material to cause it to misalign relative to the steel plate. Therefore, generally speaking, it can be said that local stress relief regions are not needed in the central region of the component, and the size and / or number of local stress relief regions (in this case, through holes) preferably increase towards the edges of the steel plate.

[0082] Figures 5a-6b The protective liner, which is also configured for use in the crusher housing, is shown. Figure 5a and Figure 5b These are three-dimensional front and rear views of the lining after vulcanization but before bending. Figure 6a and Figure 6b These are three-dimensional front and rear views of the protective lining after it has been bent. Figures 3a-3b The shell lining is similar. Figures 6a-6b The lining has a rubber layer, and the ceramic insert is vulcanized to the steel plate, wherein, in this case, the steel plate 14 has cutouts 15 to accommodate specific mounting areas. Here, the stress-relieving feature in the area defined by the outer periphery of the steel plate 14 is exemplarily provided as circular through holes 16 in the steel plate 14, and in this embodiment, the circular through holes 16 are distributed such that the number of holes 16 along the edge 11 is greater than in the area more towards the center of the plate. There are also no through holes in the longitudinally extending central region of the plate.

[0083] Figure 7a and Figure 7bThese are three-dimensional front and rear views of another liner, which also has a slightly different shape and a cutout 15 to accommodate the intended installation location.

[0084] Figure 8a and Figure 8b These are perspective front and rear views of the auxiliary shaft box protection device 20, which is used to cover the auxiliary shaft box of the crusher from above in the area near the center hub 4 (see...). Figure 1 (B in the text). The auxiliary shaft box protection device 20 protects the auxiliary shaft box from damage by falling broken material.

[0085] The protective device 20 includes an arched portion, which, according to the invention, comprises a Poly-Cer layer 12 located on a steel support and has a localized stress-relief area, which in this case is also in the form of a through-hole in the steel support. Note that such a steel support plate is not visible here because the protective device 20 is then mounted to the load-bearing structure 19. A bracket 19a is provided as a fixing element on the inward-facing surface of the load-bearing structure 19, forming a recess adapted to be fitted onto a matching protrusion (particularly a protruding stud) provided on the auxiliary shaft box of the crusher.

[0086] Note that in this arched section, the combined Poly-Cer layer 12 and steel support are bent, making the Poly-Cer layer 12 convex and the steel support concave. This is the opposite of the lining 10 described above, in which the Poly-Cer layer 12 becomes concave and the steel support becomes convex. Similarly, in this alternative bending configuration, through-holes or other localized stress-relief areas are used to reduce the internal stress in the elastic material layer 12 in almost the same manner as in the aforementioned embodiments.

[0087] Figure 9a and Figure 9b These are perspective front and rear views of the boom guard 30, which is used to cover the crusher boom from above in the area near the center hub 4 (the location of the boom guard is shown in the figure). Figure 1 (C in the text). Arm guard 30 protects the arm from damage by falling broken material.

[0088] Similar to the countersunk head guard 20 just described, the arm guard 30 includes an arched portion, which, according to the invention, comprises a Poly-Cer layer 12 on a steel support plate and is provided with localized stress relief areas, which are, for example, through holes in the steel support. The arm guard 30 is then mounted to a load-bearing structure 19, and a fixing element, in this case, in the form of a bracket 19b, is provided on the inward-facing surface of the load-bearing structure 19.

[0089] Similar to the case of the secondary shaft protection device, in the arch-shaped section, the combined Poly-Cer layer 12 and steel support are bent so that the Poly-Cer layer 12 is convex and the steel support plate is concave.

Claims

1. A wear protection component, comprising: - A layer of elastic material (12), and - Reinforcing support (14). The elastic material (12) is bonded to the reinforcing support (14), and The wear protection component is bent into a curved shape. Its features are, In the region defined by the outer periphery of the reinforcing support (14), the wear protection component includes one or more local stress relief regions (16, 17) in which the elastic material (12) is not bonded to the reinforcing support (14).

2. The wear protection component of claim 1, wherein, The elastic material (12) is vulcanized onto the reinforcing support (14).

3. The wear protection component of claim 1 or 2, wherein, The one or more local stress relief regions (16, 17) include means for preventing the elastic material from bonding to the reinforcing support (14).

4. The wear protection component of any one of claims 1 to 3, wherein, The one or more local stress relief regions include one or more through holes (16, 17) formed in the reinforcing support (14).

5. The wear protection component of any of the preceding claims, wherein, The number and / or size of the local stress relief regions (16, 17) increase toward the straight edge (11) of the wear protection component (10).

6. The wear protection component of any of the preceding claims, wherein, The reinforcing support (14) is a steel sheet or plate bent into a curved shape.

7. The wear protection component of any of the preceding claims, wherein, The elastic material (12) is a polymer or rubber.

8. The wear protection component of claim 1, wherein, The layer of the elastic material (12) further includes a wear-resistant insert (18) held by the elastic material (12), wherein the outwardly pointing surface of the wear-resistant insert (18) forms part of the wear surface of the wear protection component.

9. The wear protection component according to any one of the preceding claims, wherein, At least one peripheral region of the layer of the elastic material (12) extends beyond the outer periphery of the reinforcing support (14).

10. The wear protection component according to claim 8, wherein, The wear-resistant insert (18) is made of ceramic.

11. A method for manufacturing a wear protection component, the method comprising the following steps: - Provide reinforced support components (14). - A layer of elastic material (12) is bonded to the reinforcing support (14) to obtain a wear protection component, and - Bend the wear protection component into a curved shape. Its features are, - In the area defined by the outer periphery of the reinforcing support (14), one or more local stress relief regions (16, 17) are formed in the wear protection member, in which the elastic material (12) is not bonded to the reinforcing support (14).

12. The method according to claim 11, wherein, Integrating the elastic material (12) into the reinforcing support (14) includes vulcanizing the elastic material (12) into the reinforcing support (14).

13. The method according to claim 11 or 12, wherein, Forming the one or more local stress relief regions (16, 17) includes locally preventing the elastic material (12) from bonding to the reinforcing support (14).

14. The method according to any one of claims 11 to 13, wherein, Forming the one or more local stress relief regions includes forming one or more through holes (16, 17) in the reinforcing support (14) before or after the elastic material (12) is bonded to the reinforcing support (14) and before or after the bending portion is formed.

15. A rock crusher, comprising a frame and a crushing head, wherein, The crusher further includes a wear protection component according to any one of claims 1 to 10.

16. The rock crusher according to claim 15, wherein, The wear protection components of the crusher constitute or form part of the following components: - At least one protective liner (10), said protective liner being removably installed within the crusher, at least a portion of the outwardly pointing surface of said protective liner (10) constituting a wear surface, or - The auxiliary shaft box protection device (20) of the crusher, or - The arm protection device (30) of the crusher.

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