A long life open pit mining cutter head

Abstract

This invention provides a high-life open-pit mining cutter head, belonging to the field of mining machinery technology. It includes a cutter body, a variable-diameter shank fixedly mounted at the bottom of the cutter body, and a pencil-shaped cutter tip fixedly mounted at the bottom of the cutter body. A groove for welding and fixing the cutter tip is provided on the top of the cutter body, and a matching short retaining spring is fitted on the variable-diameter shank. The cutter tip, from the inside out, comprises a high-strength matrix layer, a wear-resistant alloy layer, and a cemented carbide particle layer, with the cemented carbide particle layer welded onto the outer surface of the wear-resistant alloy layer. The pencil-shaped cutter tip of this invention reduces cutting resistance and improves cutting efficiency. It allows the cemented carbide particle layer to preferentially wear down and protect the high-strength matrix layer, and the cemented carbide particles can be repeatedly welded back together after wear. The wear-resistant alloy layer delays crack propagation, thus increasing the overall lifespan by more than one-third compared to traditional mining cutter heads. This reduces the frequency of replacement, lowers maintenance costs, and prevents disruption to mining operations, effectively saving on operating costs.

Description

Technical Field

[0001] This utility model provides a long-life open-pit mining cutter head, belonging to the field of mining machinery technology. Background Technology

[0002] Mining is the technology and science of extracting mineral resources from the Earth's crust or surface, generally referring to the extraction of metallic or non-metallic mineral deposits. The mining industry is an important raw material extraction industry; for example, metallic ores are the main raw materials for the metallurgical industry, non-metallic ores are chemical raw materials and building materials, and coal and oil are important energy sources. Most ores require beneficiation and enrichment before they can be used as industrial raw materials. Currently, mining cutterheads are indispensable in the mining industry. In open-pit mining operations, the cutterhead, as a key component that directly contacts the ore, directly affects mining efficiency and cost.

[0003] Traditional cutting heads are often limited by their materials and structure, making them susceptible to damage and impact from ore during use. This results in a short service life, and frequent replacements not only increase maintenance costs but also affect the continuity of mining operations, thus requiring cost reduction. Therefore, this invention provides a long-life open-pit mining cutting head. Utility Model Content

[0004] The technical problem solved by this utility model is that traditional cutter heads have a short service life due to limitations in materials and structure. Frequent replacements not only increase maintenance costs but also affect the continuity of mining operations, and the cost of use needs to be reduced.

[0005] To solve the technical problem, the technical solution provided by this utility model is as follows: a high-life open-pit mining cutter head, comprising a cutter body, a variable-diameter shank fixedly disposed at the bottom of the cutter body, and a cutter tip fixedly disposed at the bottom of the cutter body, the cutter tip being pencil-shaped, a groove for welding and fixing the cutter tip being provided on the top of the cutter body, and a matching short retaining spring being fitted on the variable-diameter shank; the cutter tip comprises, from the inside out, a high-strength matrix layer, a wear-resistant alloy layer, and a cemented carbide particle layer, the cemented carbide particle layer being welded onto the outer surface of the wear-resistant alloy layer.

[0006] Furthermore, the high-strength substrate layer is made of high-toughness alloy steel, and the wear-resistant alloy layer is made of nickel-based alloy.

[0007] Furthermore, the diameter of the blade tip is 15-18mm, and the diameter of the variable-diameter shank is 42mm.

[0008] Furthermore, the blade has a frustum-shaped structure with an inwardly concave arc transition.

[0009] Furthermore, the cemented carbide particle layer uses WC-Co cemented carbide particles, which are clad and fixed to the outer surface of the wear-resistant alloy layer using a plasma welding process.

[0010] Furthermore, the thickness of the wear-resistant alloy layer is 0.2-0.5 mm, and the thickness of the hard alloy particle layer is 2-3 mm.

[0011] The beneficial effects of this utility model are:

[0012] This utility model features a pencil-shaped cutting tip that reduces cutting resistance and improves cutting efficiency. It achieves preferential wear of the hard particle layer to protect the high-strength matrix layer, and the hard alloy particles can be repeatedly welded and repaired after wear. The wear-resistant alloy layer delays crack propagation, thereby increasing the overall lifespan by more than 1 / 3 compared to mining cutter heads. This reduces the frequency of replacement, lowers maintenance costs, avoids affecting the continuity of mining operations, and effectively saves on operating costs. Attached Figure Description

[0013] Figure 1 This is a plan view of a high-life open-pit mining cutter head according to the present invention. Figure 1 .

[0014] Figure 2 This is a plan view of a high-life open-pit mining cutter head according to the present invention. Figure 2 .

[0015] Figure 3 This is a schematic diagram of a short retaining spring for a high-life open-pit mining cutter head according to the present invention.

[0016] Figure 4 This is a schematic diagram of the cross-section of the tip of a high-life open-pit mining cutter head according to this utility model.

[0017] 1. Blade tip; 2. Blade body; 3. Variable diameter handle; 4. Groove; 5. Short snap ring; 6. High-strength base layer; 7. Wear-resistant alloy layer; 8. Carbide particle layer. Detailed Implementation

[0018] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to their structure and are relative concepts. Therefore, they may vary depending on their location and usage; thus, these or other directional terms should not be interpreted as restrictive terms.

[0019] The singular forms “a,” “the,” and “the” used in this specification are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes one or more of the associated listed items, any or all possible combinations thereof.

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] According to the appendix Figure 1 , 2 As shown in Figure 3: This utility model provides a high-life open-pit mining cutter head: including a cutter body 2, a variable-diameter shank 3 fixedly installed at the bottom of the cutter body 2, and a cutter tip 1 fixedly installed at the bottom of the cutter body 2. The cutter tip 1 is pencil-shaped. The top of the cutter body 2 has a groove 4 for welding and fixing the cutter tip 1. A matching short retaining spring 5 is fitted on the variable-diameter shank 3 to enhance stability. The cutter body 2 has a concave arc transition frustum structure to optimize stress distribution and reduce fatigue damage to the matrix layer. The diameter of the cutter tip 1 is 15-18mm, and the diameter of the variable-diameter shank 3 is 42mm. Specifically, cutters with a shank diameter of 42mm are generally equipped with a short retaining spring 5 and are commonly used in HT14 and HT15 cutter holder systems. The cutter is installed in the cutter holder using a copper hammer, and the retaining spring ensures that the cutter can be replaced conveniently and quickly.

[0022] As per the instruction manual Figure 1 , 4 As shown: The cutting tip 1, from the inside out, consists of a high-strength base layer 6, a wear-resistant alloy layer 7, and a cemented carbide particle layer 8. The cemented carbide particle layer 8 is welded onto the outer surface of the wear-resistant alloy layer 7. The high-strength base layer 6 is made of high-toughness alloy steel, and the wear-resistant alloy layer 7 is made of nickel-based alloy material. The thickness of the wear-resistant alloy layer 7 is 0.2-0.5 mm. The thickness of the cemented carbide particle layer 8 is 2-3 mm. The cemented carbide particle layer 8 uses WC-Co cemented carbide particles. The WC-Co cemented carbide particles are clad and fixed onto the outer surface of the wear-resistant alloy layer 7 using a plasma welding process. Specifically, the cemented carbide particles can be repeatedly welded and repaired after wear. The WC-Co cemented carbide particle welding process is as follows: clean the surface of the wear-resistant alloy layer 7, preheat to 300-400℃; plasma weld the WC-Co cemented carbide particles at a powder feeding rate of 20-30 g / min and a layer thickness of 2-3 mm; and then slowly cool and grind to the designed dimensions.

[0023] The principle of this utility model

[0024] During use, the 42mm diameter shank, in conjunction with the retaining spring, prevents the cutter head from falling off, enhancing stability. The pencil-shaped cutter tip 1 reduces cutting resistance and improves cutting efficiency. The high-strength matrix layer 6, made of high-toughness alloy steel, bears the main cutting force and prevents breakage. The wear-resistant alloy layer 7, made of nickel-based alloy material, serves as a transition, buffering stress and enhancing bonding strength. The cemented carbide particle layer 8 is clad and fixed to the outer surface of the wear-resistant alloy layer 7 using plasma welding, directly contacting the rock strata. It utilizes the high hardness of WC to resist wear, and the cemented carbide particles can be repeatedly welded and repaired after wear. Compared to mining cutter heads, the overall lifespan is increased by more than 1 / 3, effectively saving operating costs.

[0025] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A high-life open-pit mining cutter head, comprising a cutter body (2), a variable-diameter cutter shank (3) fixedly disposed at the bottom of the cutter body (2), and a cutter tip (1) fixedly disposed at the bottom of the cutter body (2), characterized in that: The blade tip (1) is pencil-shaped, and the top of the blade body (2) is provided with a groove (4) for welding and fixing the blade tip (1). The variable diameter handle (3) is fitted with a matching short retaining ring (5). The blade tip (1) includes a high-strength base layer (6), a wear-resistant alloy layer (7), and a hard alloy particle layer (8) from the inside to the outside. The hard alloy particle layer (8) is welded to the outer surface of the wear-resistant alloy layer (7).

2. The long-life open-pit mining cutter head according to claim 1, characterized in that: The high-strength substrate layer (6) is made of high-toughness alloy steel, and the wear-resistant alloy layer (7) is made of nickel-based alloy.

3. The long-life open-pit mining cutter head according to claim 1, characterized in that: The diameter of the blade tip (1) is 15-18mm, and the diameter of the variable diameter handle (3) is 42mm.

4. The long-life open-pit mining cutter head according to claim 1, characterized in that: The blade (2) has a frustum-shaped structure with an inwardly concave arc transition.

5. A long-life open-pit mining cutter head according to claim 1, characterized in that: The cemented carbide particle layer (8) is made of WC-Co cemented carbide particles, which are clad and fixed on the outer surface of the wear-resistant alloy layer (7) by plasma welding.

6. The long-life open-pit mining cutter head according to claim 1, characterized in that: The wear-resistant alloy layer (7) has a thickness of 0.2-0.5 mm, and the hard alloy particle layer (8) has a thickness of 2-3 mm.

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