Wear-resistant cutting pick with bionic structure

Abstract

The utility model relates to a wear-resistant cutting pick, in particular to a wear-resistant cutting pick with a bionic structure, which comprises a pick head, a bionic structure, a pick handle and hard alloy, the bionic structure is positioned on the part of the pick head close to a pick shoulder, a wear-resistant coating is cladded on the part of the pick head close to the hard alloy, and the bionic structure is a layered scale structure. According to the cutting pick, broken stones during excavation are changed from sliding to rolling, the friction force borne by the shoulder part of the cutting pick is reduced, the broken stones counteract on the shoulder part of the cutting pick during rolling, so that the cutting pick rotates, and carbon nano tubes are added into hard alloy powder during cladding, so that an alloy layer has certain toughness and is not easy to crack.

Description

Technical Field

[0001] The utility model relates to a wear-resistant pick, in particular to a wear-resistant pick with a bionic structure. Background Art

[0002] Pick cutters are special consumable parts used in mining or tunnel excavation. Their failure mode is mainly abrasive wear. At present, there are two main directions for the improvement of pick cutters: one is to increase the surface hardness to achieve wear resistance; the other is to enhance the rotation performance of the pick cutters so that their working surfaces can be switched continuously.

[0003] At present, the hardness of the pick is mainly enhanced by heat treatment and laser cladding of alloy coating near the head of the pick. The self-spinning performance of the pick depends on the axial force between the crushed stone and the pick. At present, one of the solutions is to add a spiral groove to the shoulder of the pick to generate a circumferential force between the crushed stone passing through the spiral groove and the pick, causing the pick to rotate. However, this also aggravates the wear of the tooth shoulder.

[0004] Although the spiral groove can enhance the rotation performance of the pick, the wear problem of the tooth shoulder remains to be solved. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes to use a bionic structure to replace the spiral groove, taking into account the rotation performance of the pick and the wear resistance of the tooth shoulder.

[0006] Solutions for solving technical problems:

[0007] The utility model discloses a bionic structure wear-resistant pick, comprising a tooth head, a bionic structure, a tooth shank and hard alloy. The bionic structure is located on the tooth head near the tooth shoulder, the tooth head near the hard alloy is clad with a wear-resistant coating, and the bionic structure is a layered scale structure.

[0008] In the utility model, the even number layers and the odd number layers of the layered scales are arranged alternately.

[0009] Preferably, the layered flake structure has more than three layers.

[0010] In the utility model, the cemented carbide is cobalt-based tungsten carbide.

[0011] In the utility model, the wear-resistant coating is cladding of cemented carbide powder.

[0012] Preferably, carbon nanotubes are added to the cemented carbide powder of the wear-resistant coating during cladding.

[0013] Preferably, the wear-resistant coating is formed by laser cladding.

[0014] The beneficial effects of the utility model include:

[0015] The present invention uses a layered scale structure to change the sliding of crushed stones during excavation into rolling, thereby reducing the friction force on the pick shoulder. The crushed stones react on the pick shoulder during rolling, causing the pick to rotate.

[0016] In addition, carbon nanotubes are added to the cemented carbide powder during cladding to make the alloy layer have a certain toughness and not easy to crack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereoscopic diagram of a bionic structure wear-resistant pick of the utility model.

[0018] Figure 2 This is a front view of a bionic structure wear-resistant pick of the utility model.

[0019] Figure 3 This is an AA cross-sectional view of a bionic structure wear-resistant pick of the utility model.

[0020] Among them, 1. Tooth head; 2. Bionic structure; 3. Tooth handle; 4. Cemented carbide; 5. Wear-resistant coating. DETAILED DESCRIPTION

[0021] The utility model will be further described below in conjunction with the accompanying drawings.

[0022] like Figure 1-Figure 3 As shown, a bionic structure wear-resistant pick includes a tooth head 1, a bionic structure 2, a tooth shank 3 and a cemented carbide 4. The bionic structure 2 is located on the tooth head near the tooth shoulder, and the part of the tooth head near the cemented carbide is coated with a wear-resistant coating. The bionic structure 2 is a layered scale structure. The irregular stones roll under the action of the stepped scale structure and push the pick in the opposite direction.

[0023] When the pick is clad, the wear-resistant coating 5 is made of the same material as the cemented carbide, so that the wear-resistant coating 5 and the cemented carbide can be worn synchronously;

[0024] In one embodiment, the cemented carbide is cobalt-based tungsten carbide, and the cladding material is cobalt-based tungsten carbide powder;

[0025] Preferably, 1% by mass of carbon nanotubes are added to the cladding material. The carbon nanotubes can enhance the toughness of the wear-resistant coating 5 and prevent the wear-resistant coating 5 from cracking.

[0026] Although the present invention has been disclosed as above in terms of preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A bionic structure wear-resistant pick, characterized in that: The invention comprises a tooth head (1), a bionic structure (2), a tooth shank (3) and a hard alloy (4), wherein the bionic structure (2) is located at a portion of the tooth head (1) close to the tooth shoulder, a portion of the tooth head (1) close to the hard alloy (4) is clad with a wear-resistant coating (5), and the bionic structure (2) is a layered scale structure.

2. The bionic structure wear-resistant pick according to claim 1, characterized in that: The even number layers and the odd number layers of the layered scales are arranged alternately.

3. The bionic structure wear-resistant pick according to claim 1, characterized in that: The number of layers of the lamellar scales is greater than three.

4. The bionic structure wear-resistant pick according to claim 3, characterized in that: The cemented carbide (4) is cobalt-based tungsten carbide.

5. The bionic structure wear-resistant pick according to claim 4, characterized in that: The wear-resistant coating (5) is clad by hard alloy powder.

6. The bionic structure wear-resistant pick according to claim 5, characterized in that: The hard alloy powder of the wear-resistant coating (5) is added with carbon nanotubes during cladding.

7. The bionic structure wear-resistant pick according to claim 6, characterized in that: The wear-resistant coating (5) is formed by laser cladding.

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