Hard rock cutting pick with composite wear-resistant layer structure

Abstract

The utility model discloses a hard rock cutting pick with a composite wear-resistant layer structure, which comprises a cutter handle, an alloy cutter head and a conical ring sleeve, and an alloy head is arranged at the top end of the alloy cutter head; and an auxiliary blade is arranged on the outer surface of the alloy head. According to the hard rock cutting pick with the composite wear-resistant layer structure, through the arrangement of the auxiliary blade, the sawtooth blade, the small chamfers, the alloy head and the alloy tool bit, when the hard rock cutting pick is used, the auxiliary blade can firstly make contact with a cut object, mechanical energy cutting can be conducted on the object through the auxiliary blade, and the friction force of the alloy head is reduced; when a certain distance is cut, the sawtooth blade can make contact with a cut object, due to the fact that the small chamfer is arranged at one end of the sawtooth blade, cutter feeding can be facilitated, the friction force of the alloy cutter head is greatly reduced, cutting is facilitated to a certain degree, and the service life of the cutting pick can be prolonged.

Description

A hard rock cutting tool with a composite wear-resistant layer structure Technical Field

[0001] This utility model relates to the field of coal mining technology, and in particular to a hard rock cutting tooth with a composite wear-resistant layer structure. Background Technology

[0002] A tunnel boring machine (TBM) is a machine used to excavate tunnels in flat ground. TBMs can be classified into ordinary TBMs and tunnel boring machines according to their target objects; and into open-face TBMs and shield TBMs according to their operating methods. They mainly consist of a traveling mechanism, a working mechanism, a loading mechanism, and a transfer mechanism. As the traveling mechanism advances, the cutting head in the working mechanism continuously breaks the rock and removes the broken rock. The cutting head usually refers to a carbide cutting head, which is constructed by brazing carbide ball teeth to alloy structural steel. It is generally used in coal mining machines to directly cut and mine coal, hence it is also called a coal cutting carbide cutting head. Existing carbide cutting heads are usually assembled using threaded connections. While this provides some installation convenience, the inertia generated by the high-speed rotation of the carbide head during coal mining operations can easily cause the threads to strip, compromising the connection strength and thus affecting coal mining operations.

[0003] However, in the existing technology, rotary drilling cutting teeth are made by forging, and the tooth head and tooth shank are a whole. During operation, the tooth head is prone to wear and generates a lot of heat. Long-term operation will lead to an increase in the overall temperature of the cutting teeth, affecting the performance of the cutting teeth, and even overheating and softening, reducing the service life. At the same time, since most of the current tool shanks are made with uniform specifications, when installing the cutting teeth, the tool shank may be too thin, resulting in an unstable installation. Therefore, it is necessary to design a hard rock cutting tooth with a composite wear-resistant layer structure. Summary of the Invention

[0004] The main objective of this invention is to provide a hard rock cutting tooth with a composite wear-resistant layer structure, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A hard rock cutting tool with a composite wear-resistant layer structure includes a tool holder, an alloy cutting head, and a conical ring. The top of the alloy cutting head is provided with an alloy tip. The outer surface of the alloy tip is provided with auxiliary blades, which are evenly distributed in a spiral shape on the outer surface of the alloy tip. The outer surface of the alloy cutting head is provided with serrated blades, one end of which is provided with a small chamfer at 45°. The serrated blades are evenly distributed in a spiral shape on the outer surface of the alloy cutting head. The connection between the alloy cutting head and the conical ring is provided with an arc.

[0007] The present invention is further configured such that: coolant holes are provided on the outer surface of the conical ring sleeve, and the coolant holes are evenly distributed in an array on the outer surface of the conical ring sleeve.

[0008] By adopting the above technical solution, the coolant can be discharged through the coolant hole and flow out along the conical ring.

[0009] The present invention is further configured such that: a hoop is fixedly connected to the outer surface of the knife handle, and the outer surface of the hoop has notches, which are evenly distributed in an array on the outer surface of the hoop.

[0010] By adopting the above technical solution, the cutting tooth can be easily picked up by holding the hoop, and the notch design can achieve the purpose of anti-slip and prevent it from falling off when held.

[0011] The present invention is further configured such that: one end of the knife handle is fixedly connected to a connecting shaft, and the inner wall of the connecting shaft is provided with a liquid injection cavity.

[0012] By adopting the above technical solution, the connecting shaft facilitates the installation of the cutting teeth, and the injection chamber facilitates the delivery of coolant.

[0013] The present invention is further configured such that: an auxiliary bushing is provided on the outer surface of the hoop, an installation hole is provided on the outer surface of the auxiliary bushing, a reinforcing bolt is provided on the inner wall of the installation hole, and the reinforcing bolt is connected to the hoop.

[0014] By adopting the above technical solution and setting up reinforcing bolts, the auxiliary bushing can be easily fixed.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In this invention, by setting up an auxiliary blade, a serrated blade, a small chamfer, an alloy head, and an alloy cutting head, the auxiliary blade can first contact the object being cut during use. Using the auxiliary blade, the object can be mechanically cut, reducing the friction of the alloy head. Then, when the cutting reaches a certain distance, the serrated blade can contact the object being cut. Since one end of the serrated blade is provided with a small chamfer, it is easy to insert the blade, greatly reducing the friction of the alloy cutting head, which facilitates cutting to a certain extent and can also extend the service life of the cutting teeth. Attached Figure Description

[0017] Figure 1 is a front view of the structure of this utility model;

[0018] Figure 2 is a schematic diagram of the alloy cutter head structure of this utility model;

[0019] Figure 3 is a schematic diagram of the connecting shaft structure of this utility model.

[0020] In the diagram: 1. Tool holder; 2. Alloy tool tip; 3. Tapered ring sleeve; 4. Alloy head; 5. Auxiliary insert; 6. Serrated insert; 7. Small chamfer; 8. Arc; 9. Coolant hole; 10. Hoop ring; 11. Notch; 12. Connecting shaft; 13. Injection chamber; 14. Auxiliary bushing; 15. Mounting hole; 16. Reinforcing bolt. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] As shown in Figures 1-3, a hard rock cutting tool with a composite wear-resistant layer structure includes a handle 1, an alloy cutting head 2, and a conical ring sleeve 3. An alloy head 4 is provided at the top of the alloy cutting head 2.

[0023] In this embodiment, the outer surface of the alloy head 4 is provided with auxiliary blades 5, which are evenly distributed in a spiral shape on the outer surface of the alloy head 4. The outer surface of the alloy cutter head 2 is provided with serrated blades 6, one end of which is provided with a small chamfer 7 at 45°. The serrated blades 6 are evenly distributed in a spiral shape on the outer surface of the alloy cutter head 2. An arc 8 is provided at the connection between the alloy cutter head 2 and the conical ring sleeve 3.

[0024] In practical use, the auxiliary blade 5 can first contact the object being cut. Using the auxiliary blade 5, the object can be mechanically cut, reducing the friction of the alloy head 4. Then, when the cutting reaches a certain distance, the serrated blade 6 can contact the object being cut. Since one end of the serrated blade 6 is provided with a small chamfer 7, it is easy to insert the blade, which greatly reduces the friction of the alloy head 2, making cutting easier to a certain extent and extending the service life of the cutting teeth.

[0025] In this embodiment, coolant holes 9 are provided on the outer surface of the conical ring sleeve 3, and the coolant holes 9 are evenly distributed in an array on the outer surface of the conical ring sleeve 3.

[0026] In practical use, the coolant can be discharged through the coolant hole 9 and can flow out along the conical ring 3.

[0027] In this embodiment, a hoop 10 is fixedly connected to the outer surface of the handle 1. The outer surface of the hoop 10 has notches 11, which are evenly distributed in an array on the outer surface of the hoop 10.

[0028] In practical use, the cutting tooth can be easily picked up by holding the hoop 10 with your hand, and the notch 11 is designed to prevent slipping and prevent it from falling off when held.

[0029] In this embodiment, a connecting shaft 12 is fixedly connected to one end of the knife handle 1, and an injection cavity 13 is provided on the inner wall of the connecting shaft 12.

[0030] In practical use, the connecting shaft 12 allows for easy installation of the cutting teeth, and the injection chamber 13 allows for the delivery of coolant.

[0031] In this embodiment, an auxiliary bushing 14 is provided on the outer surface of the hoop 10, and an installation hole 15 is provided on the outer surface of the auxiliary bushing 14. A reinforcing bolt 16 is provided on the inner wall of the installation hole 15, and the reinforcing bolt 16 is connected to the hoop 10.

[0032] In practical use, when installing, the connecting shaft 12 is relatively thin. The auxiliary bushing 14 can be placed on the outer surface of the connecting shaft 12, and then the reinforcing bolt 16 can be placed inside the mounting hole 15. Then, the reinforcing bolt 16 can be tightened with a tool, which can easily fix the auxiliary bushing 14.

[0033] Working principle: During use, the cutting teeth can be easily picked up by holding the clamp 10. The notch 11 provides a non-slip surface, preventing the cutting teeth from slipping off. During operation, the auxiliary blade 5 first contacts the object being cut, using its mechanical properties to cut the object and reducing the friction of the alloy head 4. Then, after cutting a certain distance, the serrated blade 6 contacts the object. Because one end of the serrated blade 6 has a small chamfer 7, it facilitates entry and significantly reduces the friction of the alloy cutting head 2. To a certain extent, it facilitates cutting and can extend the service life of the cutting teeth. The coolant hole 9 allows the coolant to be discharged and flow out along the conical ring sleeve 3. The connecting shaft 12 facilitates the installation of the cutting teeth. When installing, the connecting shaft 12 is relatively thin, so the auxiliary bushing 14 can be placed on the outer surface of the connecting shaft 12. Then, the reinforcing bolt 16 is placed inside the mounting hole 15, and the reinforcing bolt 16 is tightened with a tool, which facilitates the fixation of the auxiliary bushing 14. The liquid injection chamber 13 allows for the delivery of coolant.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hard rock cutting tool with a composite wear-resistant layer structure, comprising a tool holder (1), an alloy cutting tip (2), and a tapered ring sleeve (3), characterized in that: The top of the alloy cutter head (2) is provided with an alloy head (4); the outer surface of the alloy head (4) is provided with an auxiliary blade (5), the auxiliary blade (5) is evenly distributed in a spiral shape on the outer surface of the alloy head (4), the outer surface of the alloy cutter head (2) is provided with a serrated blade (6), one end of the serrated blade (6) is provided with a small chamfer (7), the small chamfer (7) is 45°, the serrated blade (6) is evenly distributed in a spiral shape on the outer surface of the alloy cutter head (2), and an arc (8) is provided at the connection between the alloy cutter head (2) and the conical ring sleeve (3).

2. The hard rock cutting tooth with a composite wear-resistant layer structure according to claim 1, characterized in that: The outer surface of the conical ring (3) is provided with coolant holes (9), which are evenly distributed in an array on the outer surface of the conical ring (3).

3. The hard rock cutting tooth with a composite wear-resistant layer structure according to claim 1, characterized in that: The outer surface of the handle (1) is fixedly connected to a hoop (10), and the outer surface of the hoop (10) is provided with a notch (11), which is evenly distributed in an array on the outer surface of the hoop (10).

4. The hard rock cutting tooth with a composite wear-resistant layer structure according to claim 1, characterized in that: One end of the knife handle (1) is fixedly connected to a connecting shaft (12), and the inner wall of the connecting shaft (12) is provided with an injection cavity (13).

5. The hard rock cutting tooth with a composite wear-resistant layer structure according to claim 3, characterized in that: An auxiliary bushing (14) is provided on the outer surface of the hoop (10). An installation hole (15) is provided on the outer surface of the auxiliary bushing (14). A reinforcing bolt (16) is provided on the inner wall of the installation hole (15). The reinforcing bolt (16) is connected to the hoop (10).

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