Coal mining machine cutting pick with high comprehensive strength

Abstract

The utility model relates to the technical field of coal mining, and discloses a coal mining machine cutting pick with high comprehensive strength, which comprises a pick handle, the upper end of the pick handle is fixedly connected with a fluted disc, the center of the upper end face of the fluted disc is fixedly connected with a pick head, and the center of the upper end of the pick head is provided with a pick top. A plurality of cladding layers are arranged on the side wall of the tooth head located at the lower end of the tooth tip in a circumferential array mode, and a plurality of inclined grooves are formed in the side wall of the tooth head located at the lower end of the cladding layers in a circumferential array mode. The tooth head comprises a wear-resistant layer, a reinforcing layer and a body layer, the reinforcing layer is arranged on the outer side of the body layer, and the wear-resistant layer is arranged on the outer side of the reinforcing layer. According to the wear-resistant tooth, the wear-resistant layer and the reinforcing layer are matched for use, the wear resistance and the overall strength can be improved, meanwhile, the cladding layer is metallurgically bonded on the side wall of the upper end of the tooth head through the cladding technology, the strength and the wear resistance of the tooth head and the tooth tip can be further enhanced, and the risks of tooth breakage and excessive wear are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mining, especially relates to a high comprehensive strength coal winning machine tooth. BACKGROUND

[0002] The coal winning machine tooth is one of the key core components in the coal mining process, is mainly used for cutting coal seam and rock, and its performance directly influences the cutting efficiency, service life and overall mining cost of the coal winning machine, with the development of coal mining to deep mine, complex geological conditions and efficient mining direction, the tooth is faced with more severe working environment, including high hardness rock, high wear, high temperature and frequent impact load etc.

[0003] The traditional coal winning machine tooth usually adopts the structure that the hard alloy tooth head and the steel tooth body are connected through the brazing process, in the hard rock mining, the wear resistance of the traditional hard alloy tooth head is difficult to meet the demand of long time efficient cutting, causes the tooth to frequently replace, increases the mining cost and downtime, under the complex geological conditions, the tooth often receives the severe impact load, is easy to cause the tooth head to fall off, the tooth body breaks and other problems, seriously influences the normal operation of the coal winning machine, therefore, the person skilled in the art provides a high comprehensive strength coal winning machine tooth to solve the problems in the background art. SUMMARY

[0004] The utility model discloses a kind of high comprehensive strength coal winning machine tooth to solve the problems in the background art, by setting wear-resistant layer and reinforcing layer are used in cooperation, can improve wear resistance and overall strength, simultaneously by adopting metallurgical bonding cladding layer on the side wall of the upper end of tooth head, can further enhance the strength and wear resistance of tooth head and tooth tip, avoid the risk of broken tooth and excessive wear.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of high comprehensive strength coal winning machine tooth, including tooth handle, the upper end of the tooth handle is fixedly connected with tooth disc, the upper end surface center of the tooth disc is fixedly connected with tooth head, the upper end center of the tooth head is provided with tooth tip, multiple cladding layers are circumferentially arrayed on the side wall of tooth head at the tooth tip lower end, multiple inclined grooves are circumferentially arrayed on the side wall of tooth head at the lower end of multiple cladding layers;

[0006] The tooth head includes wear-resistant layer, reinforcing layer and body layer, the outside of the body layer is provided with reinforcing layer, the outside of the reinforcing layer is provided with wear-resistant layer;

[0007] Through the technical scheme, the wear resistance and the overall strength can be improved by cooperation between the wear-resistant layer and the reinforcing layer, and the strength and wear resistance of the tooth head and the tooth tip can be further enhanced by the metallurgical bonding cladding layer on the side wall of the upper end of the tooth head through the cladding technology, so that the risk of tooth breakage and excessive wear is avoided.

[0008] Further, the side wall of the tooth handle is provided with a ring groove at the lower end of the center, and a movable sleeve is arranged on the side wall of the tooth handle in the ring groove;

[0009] Through the technical scheme, the wear resistance and the overall strength can be improved by cooperation between the wear-resistant layer and the reinforcing layer, and the strength and wear resistance of the tooth head and the tooth tip can be further enhanced by the metallurgical bonding cladding layer on the side wall of the upper end of the tooth head through the cladding technology, so that the risk of tooth breakage and excessive wear is avoided.

[0010] Further, the material of the plurality of cladding layers is tungsten alloy steel;

[0011] Through the technical scheme, the wear resistance and the overall strength can be improved by cooperation between the wear-resistant layer and the reinforcing layer, and the strength and wear resistance of the tooth head and the tooth tip can be further enhanced by the metallurgical bonding cladding layer on the side wall of the upper end of the tooth head through the cladding technology, so that the risk of tooth breakage and excessive wear is avoided.

[0012] Further, the connecting part between the lower end surface of the tooth disc and the upper end of the tooth handle is provided with an arc surface;

[0013] Through the technical scheme, the contact area during mining is increased, and the mining effect is improved.

[0014] Further, the material of the wear-resistant layer and the reinforcing layer is high-toughness secondary-hardening steel and air-cooled bainite steel, respectively;

[0015] Through the technical scheme, the high-toughness secondary-hardening steel has high creep and endurance strength, the air-cooled bainite steel has high hardness and wear resistance, and the two are used in cooperation to improve the overall comprehensive use performance.

[0016] Further, the shapes of the tooth tip and the tooth head are conical;

[0017] Through the technical scheme, the progressive mining is better in use effect.

[0018] The utility model has the following beneficial effects:

[0019] 1、 the utility model discloses a wear-resistant layer and reinforcing layer are used in cooperation, can improve wear resistance and overall strength, high-toughness secondary-hardening steel has high creep and endurance strength, air-cooled bainite steel has high hardness and wear resistance, and the two are used in cooperation to improve the overall comprehensive use performance.

[0020] 2、 the utility model discloses a cladding layer on the side wall of the upper end of the tooth head through the cladding technology, can further enhance the strength and wear resistance of the tooth head and the tooth tip, avoid the risk of tooth breakage and excessive wear. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A shaft drawing of the coal mining machine pick with high comprehensive strength is provided in the utility model;

[0022] Figure 2 Another perspective shaft drawing of the coal mining machine pick with high comprehensive strength is provided in the utility model;

[0023] Figure 3 A front view of the coal mining machine pick with high comprehensive strength is provided in the utility model;

[0024] Figure 4 A bottom sectional view of the coal mining machine pick with high comprehensive strength is provided in the utility model.

[0025] LEGEND:

[0026] 1, tooth handle; 2, movable sleeve; 3, ring groove; 4, tooth disc; 5, inclined groove; 6, tooth tip; 7, cladding layer; 8, tooth head; 801, wear-resistant layer; 802, reinforcing layer; 803, body layer. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0028] WITH REFERENCE Figures 1-4 The utility model provides an embodiment: a coal mining machine pick with high comprehensive strength, including tooth handle 1, the upper end of tooth handle 1 is fixedly connected with tooth disc 4, the upper end surface center of tooth disc 4 is fixedly connected with tooth head 8, the upper end center of tooth head 8 is provided with tooth tip 6, the side wall of tooth head 8 at the lower end of tooth tip 6 is circumferentially arranged with multiple cladding layers 7, the side wall of tooth head 8 at the lower end of multiple cladding layers 7 is circumferentially arranged with multiple inclined grooves 5.

[0029] Tooth head 8 includes wear-resistant layer 801, reinforcing layer 802 and body layer 803, the outside of body layer 803 is provided with reinforcing layer 802, the outside of reinforcing layer 802 is provided with wear-resistant layer 801.

[0030] The side wall center of tooth handle 1 is provided with ring groove 3 at the lower end, the side wall of tooth handle 1 in the inside of ring groove 3 is provided with movable sleeve 2, which is convenient for installation and connection with equipment during use.

[0031] The material of the plurality of cladding layers 7 is tungsten alloy steel, which has high hardness and wear resistance, and through the use of laser cladding technology, a metallurgical bonding filler cladding layer 7 can be formed, further strengthening the overall strength and wear resistance, ensuring the service life, the lower end surface of the tooth disc 4 and the upper end of the tooth handle 1 are provided with an arc surface, increasing the contact area during mining, improving the mining effect, the materials of the wear-resistant layer 801 and the reinforcing layer 802 are high-toughness secondary-hardened steel and air-cooled bainite steel respectively, the high-toughness secondary-hardened steel has high creep and endurance strength, the air-cooled bainite steel has high hardness and wear resistance, and the two are used in cooperation to improve the overall comprehensive performance, the shapes of the tooth tip 6 and the tooth head 8 are conical, and the mining is progressive, and the use effect is better.

[0032] Working principle: the utility model discloses a coal mining machine picks tooth with high comprehensive strength, through setting up wear-resistant layer 801 and reinforcing layer 802 and using in cooperation, can improve wear resistance and the strength of whole, high-toughness secondary-hardened steel has high creep and endurance strength, air-cooled bainite steel has high hardness and wear resistance, and the two are used in cooperation to improve the overall comprehensive performance, and simultaneously through the use of cladding technology on the sidewall of the upper end of tooth head 8 metallurgical bonding cladding layer 7, can further strengthen the strength and wear resistance of tooth head 8 and tooth tip 6, avoid the risk of broken tooth and excessive wear and tear.

[0033] Finally, it should be noted that: the above only for preferred embodiment of the utility model has been described, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. in the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A high-strength coal mining machine cutting tooth, comprising a tooth shank (1), characterized in that: The upper end of the toothed shank (1) is fixedly connected to a toothed disc (4), and a toothed head (8) is fixedly connected to the center of the upper end face of the toothed disc (4). A tooth tip (6) is provided at the center of the upper end of the toothed head (8). Multiple cladding layers (7) are arranged in a circular array on the side wall of the toothed head (8) below the tooth tip (6). Multiple inclined grooves (5) are arranged in a circular array on the side wall of the toothed head (8) below the multiple cladding layers (7). The tooth (8) includes a wear-resistant layer (801), a reinforcing layer (802) and a body layer (803). The reinforcing layer (802) is disposed on the outer side of the body layer (803), and the wear-resistant layer (801) is disposed on the outer side of the reinforcing layer (802).

2. The high-strength coal mining machine cutting tooth according to claim 1, characterized in that: A ring groove (3) is provided at the lower end of the center of the side wall of the toothed shank (1), and a movable sleeve (2) is fitted on the side wall of the toothed shank (1) inside the ring groove (3).

3. The high-strength coal mining machine cutting tooth according to claim 1, characterized in that: The material of all the cladding layers (7) is tungsten alloy steel.

4. The high-strength coal mining machine cutting tooth according to claim 1, characterized in that: An arc-shaped surface is provided at the connection between the lower end face of the toothed disc (4) and the upper end of the toothed shank (1).

5. A high-strength coal mining machine cutting tooth according to claim 1, characterized in that: The wear-resistant layer (801) and the reinforcing layer (802) are made of high-toughness secondary hardening steel and air-cooled bainitic steel, respectively.

6. A high-strength coal mining machine cutting tooth according to claim 1, characterized in that: Both the tooth tip (6) and the tooth head (8) are conical in shape.

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