Mining high-toughness impact-resistant crushing cutter tooth and mining crusher

Abstract

The utility model discloses a mining high-toughness impact-resistant crushing cutter tooth which comprises a base body, wear-resistant blocks and impact-resistant blocks, the impact-resistant blocks are arranged at the ends of the base body, and the wear-resistant blocks are arranged on the inner side of the base body. The wear-resistant block and the impact-resistant block are arranged on the inner side and the end part of the base body through the bolts, and then the wear-resistant block and the impact-resistant block are respectively and firmly connected with the base body in a welding manner, so that the wear resistance and the service life of the product in the use process are obviously improved. The utility model further provides a mining crusher.

Description

Technical Field

[0001] The utility model relates to the technical field of mining crushers, in particular to a mining crushing tooth with high toughness and impact resistance and a mining crusher. Background Art

[0002] The crushing tooth is a main component of a mining crusher, which breaks large coal blocks into small pieces in the mine. During use, it has to withstand harsh working conditions such as impact, fatigue, friction, and corrosion. The wear-resistant part of the damaged tooth produced by the company mainly relies on the surfacing cladding additive manufacturing technology. A wear-resistant layer is welded and cladded on the base body using a wear-resistant welding wire (high-chromium welding wire). Since cracks are likely to appear after welding, the wear resistance is poor during the use in the mine, and some of the welded wear-resistant layers are likely to fall off. The re-manufactured teeth returned to the factory are basically scrapped, and the wear life of the crusher teeth of the company fails to meet the customer's requirements. Summary of the Invention

[0003] In order to solve the technical problems existing in the above technology, in view of this, it is necessary to provide a mining crushing tooth with high toughness and impact resistance.

[0004] A mining crushing tooth with high toughness and impact resistance includes a base body, a wear-resistant block, and an impact-resistant block; the impact-resistant block is arranged at the end of the base body, and the wear-resistant block is arranged inside the base body.

[0005] Preferably, both the wear-resistant block and the impact-resistant block are fixed to the base body by bolts.

[0006] Preferably, both the wear-resistant block and the impact-resistant block are provided with counterbores for the bolts to pass through; and the base body is provided with internal threaded blind holes for bolt connection.

[0007] Preferably, one end of the impact-resistant block facing the wear-resistant block protrudes from the inner surface of the base body.

[0008] Preferably, the thickness of one end of the impact-resistant block facing the wear-resistant block is greater than the thickness of the end of the impact-resistant block away from the wear-resistant block.

[0009] Preferably, the outer side of one end of the impact-resistant block facing the wear-resistant block is arc-shaped.

[0010] Preferably, the thickness of one end of the wear-resistant block facing the impact-resistant block is greater than the thickness of the end of the wear-resistant block away from the impact-resistant block.

[0011] Preferably, the inner surface of the base body and the end surface of the base body are both provided with clamping grooves, and the wear-resistant block and the impact-resistant block are provided with protrusions adapted to the clamping grooves.

[0012] Preferably, the clamping grooves and the protrusions are in a zigzag structure.

[0013] It is also necessary to provide a mining crusher.

[0014] A mining crusher includes the above-mentioned mining strong-toughness impact-resistant crushing cutter teeth.

[0015] Compared with the prior art, for the mining strong-toughness impact-resistant crushing cutter teeth provided by the present utility model, wear-resistant blocks and impact-resistant blocks are installed on the inner side and the end of the base body through bolts, and then the wear-resistant blocks and the impact-resistant blocks are firmly connected to the base body in a welding form. During the use process, the wear resistance and service life of the product are significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural view of the crushing teeth in the prior art.

[0018] Figure 2 It is a schematic structural view of the present utility model.

[0019] Figure 3 It is a schematic structural view of the base body of the present utility model.

[0020] Figure 4 For the present utility model Figure 3 It is a schematic side view structure of the present utility model.

[0021] Figure 5 It is a schematic structural view of the wear-resistant block and the impact-resistant block of the present utility model.

[0022] In the figure: base body 01, wear-resistant block 02, impact-resistant block 03, bolt 04, counterbore 05, internal thread blind hole 06, card slot 07, convex part 08. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0024] In the description of the present utility model, it should be understood that the terms "upper", "middle", "outer", "inner", "lower", etc. indicating orientation or positional relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0025] Please refer to Figures 2 to 5 , the present utility model provides a mining - use strong - toughness and impact - resistant crushing cutter tooth, including a base body 01, a wear - resistant block 02, and an impact - resistant block 03; the impact - resistant block 03 is arranged at the end of the base body 01, and the wear - resistant block 02 is arranged inside the base body 01. The base body 01 is forged from 45Mn and Mn13 materials, and the base material is subjected to quenching and tempering treatment, with the tempering hardness being HB280 - 320. The impact - resistant block 03 is a strong - toughness wear - resistant steel plate with uniform hardness and strong hardenability. The steel plate contains alloying elements such as Mn, Cr, Mo, V, and Nb, which are used to strengthen the solid solution, purify the grain boundaries, refine the grains, and can make inclusions disperse and spheroidize. The design of the strong - toughness wear - resistant steel plate reduces the stability of austenite in the steel. Under medium - and low - impact loads, through strain - induced martensite transformation, its strengthening coefficient is as high as 2.5 times, the surface hardness can be increased to HRC52 - 65, and the depth of the strengthening layer is about 2 mm. When a layer of the hardened material on the surface is worn off, the newly exposed surface will also be self - strengthened. Therefore, during use, the wear resistance and service life of the product are significantly improved. However, in the center where no plastic deformation occurs, high impact toughness is still maintained. The strong - toughness wear - resistant steel plate belongs to austenitic quenched steel, overcoming the disadvantages of low yield strength and poor abrasive wear performance of high - manganese steel, and significantly improving the surface hardness and wear resistance. It can withstand large impact loads without fracture, and its anti - spalling and anti - fragmentation performance is more than 5 times that of other alloy steels. During use, the surface of the product "becomes harder and harder as it is worn". When a layer of the hardened material on the surface is worn off, the newly exposed surface will also be self - strengthened. The steel grade has a strain - induced martensite transformation strengthening mechanism under medium - and low - impact loads (working conditions). After strengthening, the surface hardness can reach HRC52 - 65, and when a layer on the surface is worn off, the newly exposed surface will also be self - strengthened. The wear - resistant block 02 is made of high - strength wear - resistant steel NM450 with uniform hardness and strong hardenability. C≤0.27, Si≤0.7, Mn≤1.7, Cr≤1.5, Mo≤1.0, Ni≤1.0, and the above - mentioned wear - resistant steel is subjected to heat treatment quenching technology, with the tensile strength Rm≥1200 Mpa, the yield strength Reh≥1000 Mpa, the hardness of the wear - resistant steel: ≥450 HB, ≥47 HRC, the impact energy AKv at room temperature≥60 J, and AKv at - 20 °C≥27 J.

[0026] In one embodiment, the wear-resistant block 02 and the impact-resistant block 03 are both fixed to the base body 01 by bolts 04. The edges of the wear-resistant block 02 and the impact-resistant block 03 are connected to the base body 01 by welding.

[0027] Specifically, the wear-resistant block 02 and the impact-resistant block 03 are both provided with counterbores 05 through which the bolts 04 can pass; the base body 01 is provided with internal thread blind holes 06 for connecting the bolts 04.

[0028] In one embodiment, one end of the impact-resistant block 03 facing the wear-resistant block 02 protrudes from the inner surface of the base body 01.

[0029] Specifically, the thickness of one end of the impact-resistant block 03 facing the wear-resistant block 02 is greater than the thickness of the end of the impact-resistant block 03 away from the wear-resistant block 02.

[0030] Specifically, the outer side of one end of the impact-resistant block 03 facing the wear-resistant block 02 is arc-shaped.

[0031] In one embodiment, the thickness of one end of the wear-resistant block 02 facing the impact-resistant block 03 is greater than the thickness of the end of the wear-resistant block 02 away from the impact-resistant block 03.

[0032] In one embodiment, the inner surface of the base body 01 and the end surface of the base body 01 are both provided with clamping grooves 07, and the wear-resistant block 02 and the impact-resistant block 03 are provided with protruding portions 08 adapted to the clamping grooves 07. After the clamping grooves 07 and the protruding portions 08 are assembled, a better grasping force can be formed, which can prevent the wear-resistant block 02 and the impact-resistant block 03 from sliding relative to the base body 01, reduce the impact force on the bolts 04, and prevent the bolts 04 from deforming.

[0033] Specifically, the clamping grooves 07 and the protruding portions 08 are in a serrated structure.

[0034] A mining crusher includes mining strong and tough impact-resistant crushing cutter teeth.

[0035] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A strong, tough and impact-resistant crushing cutter tooth for mining, characterized in that: It includes a matrix, wear-resistant blocks, and impact-resistant blocks; the impact-resistant blocks are arranged at the ends of the matrix, and the wear-resistant blocks are arranged inside the matrix.

2. The strong, tough and impact-resistant crushing cutter tooth for mining according to claim 1, characterized in that: Both the wear-resistant blocks and the impact-resistant blocks are fixed to the matrix by bolts.

3. The mining strong toughness impact-resistant crushing cutter tooth according to claim 1, characterized in that: Both the wear-resistant blocks and the impact-resistant blocks are provided with counterbores for the bolts to pass through; the matrix is provided with internal threaded blind holes for bolt connection.

4. The mining strong toughness impact-resistant crushing cutter tooth according to claim 1, characterized in that: One end of the impact-resistant block facing the wear-resistant block protrudes from the inner surface of the matrix.

5. The mining strong toughness and impact-resistant crushing cutter tooth according to claim 4, characterized in that: The thickness of the end of the impact-resistant block facing the wear-resistant block is greater than the thickness of the end of the impact-resistant block away from the wear-resistant block.

6. The mining strong toughness impact-resistant crushing cutter tooth according to claim 5, characterized in that: The outer side of the end of the impact-resistant block facing the wear-resistant block is arc-shaped.

7. The impact-resistant and crush-resistant cutting tooth for mining use according to claim 1, wherein: The thickness of the end of the wear-resistant block facing the impact-resistant block is greater than the thickness of the end of the wear-resistant block away from the impact-resistant block.

8. The mining strong toughness and impact resistant crushing cutter tooth according to claim 1, characterized in that: Both the inner surface of the matrix and the end surface of the matrix are provided with card slots, and the wear-resistant blocks and the impact-resistant blocks are provided with protruding portions adapted to the card slots.

9. The impact-resistant broken cutter tooth for mine use with high strength and toughness according to claim 8, characterized in that: The card slots and the protruding portions are in a serrated structure.

10. A crusher for mining, characterized in that: It includes the mining strong toughness impact-resistant crushing cutter tooth according to any one of claims 1-9.

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