An improved pick structure

Abstract

The utility model belongs to the field of wear -resisting metal structure, concretely relates to an improved tooth structure. It includes: tooth head, tooth seat and connecting body, one end of tooth head is arc, the other end is provided with first connecting part, tooth seat includes base body and second connecting part, first connecting part and second connecting part extend to the direction of middle connecting body, connecting body has recessed area with first connecting part and second connecting part shape matching, first connecting part and second connecting part are embedded in recessed area of connecting body respectively. The tooth structure of this patent reduces the dosage of tooth head, and greatly reduces the production cost. The utility model is simple in structure, reasonable in design, is favorable to industrial production, makes the tooth show excellent performance in the use process, is applicable to various high -strength operation environment.

Description

Technical Field

[0001] This utility model belongs to the field of wear-resistant equipment, and specifically relates to an improved cutting tooth structure. Background Technology

[0002] Cutting teeth are key components installed on mining machinery such as coal mining machines and tunneling machines, primarily used for crushing coal and rock. They directly participate in excavation operations, stripping and collecting materials by cutting and crushing rock or coal seams. The design and materials of cutting teeth are crucial for improving mining efficiency, reducing energy consumption, and extending equipment lifespan.

[0003] Cutting teeth not only need to be wear-resistant, but also require excellent comprehensive properties such as hardness and high-temperature resistance. Cemented carbide, due to its high hardness and wear resistance, is widely used in high-wear environments such as mining and metallurgy. However, cemented carbide materials are often very expensive.

[0004] Currently, cutting teeth either use fully carbide tips or brazed carbide tips. Fully carbide tips are too expensive and will inevitably need to be replaced if problems occur, while the bonding strength of brazed carbide tips still needs to be improved. Utility Model Content

[0005] To address the aforementioned problems and achieve a lower cost and higher strength cutting tooth, this invention proposes an improved cutting tooth structure that can save more than 40% of the cemented carbide usage.

[0006] This utility model provides an improved cutting tooth structure, the cutting tooth structure comprising:

[0007] The cutting tooth head, the cutting tooth base, and the connecting body are provided. One end of the cutting tooth head is arc-shaped, and the other end is provided with a first connecting portion. The cutting tooth base includes a base body and a second connecting portion. The first connecting portion and the second connecting portion extend toward the central connecting body. The connecting body has a recessed area that matches the shape of the first connecting portion and the second connecting portion. The first connecting portion and the second connecting portion are respectively embedded in the recessed area of ​​the connecting body. At least a portion of the end area of ​​the first connecting portion and the second connecting portion is larger than the size of its front end or middle portion.

[0008] Preferably, the first connecting portion includes a first columnar protrusion structure disposed in the middle and a first annular protrusion structure disposed outside the first columnar protrusion structure, the end of the first columnar protrusion structure expanding outward and the end of the first annular protrusion structure contracting inward, and / or, the second connecting portion includes a second columnar protrusion structure disposed in the middle and a second annular protrusion structure disposed outside the second columnar protrusion structure, the end of the second columnar protrusion structure expanding outward and the end of the second annular protrusion structure contracting inward.

[0009] Preferably, the ends of the first connecting portion and the second connecting portion are inverted trapezoidal, spherical, disc-shaped, or mushroom-shaped.

[0010] Preferably, the connector is integrally cast between the cutting tooth head and the cutting tooth seat.

[0011] Preferably, at least one surface of the first connecting portion and the second connecting portion is covered with a bonding film layer, the bonding film layer being made of a material that is the same as or compatible with the connecting body.

[0012] Preferably, the outer side of the main body of the connector is provided with a connecting material surface layer, which is a coating layer made of wear-resistant material.

[0013] Preferably, the first connecting portion and the second connecting portion extend towards the end in a progressive or stepped manner, with the cross-sectional dimensions gradually increasing.

[0014] Preferably, the connector is integrally cast between the alloy tooth and the steel base.

[0015] Preferably, the cutting tooth is made of cemented carbide, ceramic or special alloy steel, and the connector is made of stainless steel, high manganese steel, cast iron, copper alloy, titanium alloy or aluminum alloy.

[0016] Beneficial effects

[0017] This invention proposes an improved cutting tooth structure. The interlocking structure of the connecting material, cutting tooth head, and tooth base ensures a tight bond between the carbide head and the alloy steel base. The outer walls of all three components have a smooth connection structure, effectively reducing friction and wear during use. Furthermore, this structure reduces the amount of cutting tooth used, significantly lowering production costs. This invention features a simple and rational design, facilitating industrial production. The resulting cutting tooth exhibits excellent performance during use, significantly extending its service life, reducing replacement frequency, and making it suitable for various high-intensity working environments.

[0018] Furthermore, in the preferred implementation, this utility model incorporates an enhanced design:

[0019] The double-locking connection method, specifically taking the connection between the cutting tooth holder and the connecting body as an example, involves a second columnar protrusion structure in the middle and a second annular protrusion structure on the outer side of the cutting tooth holder. The side edge of the second protrusion structure in the middle has an expanding trend, which can be gradually expanding or gradient expanding, extending outwards towards the cutting tooth head. An annular protrusion is provided on the outer side of the connecting end of the cutting tooth holder, contracting inwards towards the cutting tooth head. Thus, after the connecting material is cast, the connection... The bonding material will extend into the embedded area enclosed by the second columnar protrusion structure and the second annular protrusion structure. When the cutting tooth head and the connector are subjected to force transmitted to the base, if the cutting tooth head and the connector tend to detach from the cutting tooth structure, due to the bulging area (disc structure) at the end of the second columnar protrusion structure, the part of the cutting tooth structure extending into the cutting tooth seat between the second columnar protrusion structure and the annular protrusion will have an expansion tendency. The annular protrusion, due to its inward contraction, just suppresses this expansion tendency, making the fixation effect between the two better. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the cutting tooth structure of Embodiment 1 of this utility model.

[0021] Figure 2 for Figure 1 This is a schematic diagram of the disassembled structure of the cutting tooth structure in Embodiment 1 of this utility model.

[0022] Figure 3 A physical drawing of the cutting tooth holder in Embodiment 1 of this utility model.

[0023] Figure 4 This is a physical diagram of the cutting tooth head placed on the cutting tooth seat in Embodiment 1 of this utility model.

[0024] Figure 5 This is a schematic diagram of the structure of a variant of the cutting tooth head of this utility model, which includes a side cross-sectional view and a top view.

[0025] Figure 6 This is a schematic diagram of the structure of a variant of the cutting tooth head of this utility model, which includes a side cross-sectional view and a top view.

[0026] Figure 7 This is a schematic diagram of the structure of a variant of the cutting tooth head of this utility model, which includes a side cross-sectional view and a top view.

[0027] Figure 8 This is a schematic diagram of the structure of a variant of the cutting tooth head of this utility model, which includes a side cross-sectional view and a top view.

[0028] Figure 9 This is a schematic diagram of the structure of another variant of the cutting tooth holder of this utility model, which includes a side cross-sectional view and a top view. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0030] This invention proposes an improved cutting tooth structure and its preparation method.

[0031] Example 1

[0032] like Figure 1 As shown, the cutting tooth structure of this utility model includes a cutting tooth head 1, a cutting tooth seat 3, and a connecting body 2. Preferably, a connecting surface layer 4 is also provided on the outside of the connecting body.

[0033] The cutting head comprises two parts: an upper part and a lower part. The upper part is mushroom-shaped and serves as the working end. The lower part has a first connecting part, which is an inverted trapezoidal protrusion. It is called an inverted trapezoid because the diameter of the end of the protrusion is larger than the diameter of the middle part. That is, in this embodiment, it adopts a columnar structure with a trapezoidal cross-section (longitudinal section), and the diameter of the columnar structure gradually increases from the part connected to the working end to the end. The first connecting part includes a first columnar protrusion 10 in the middle and an annular protrusion 11 on the outside.

[0034] The cutting tooth holder includes the base body ( Figure 1 and 2 (lower part) and second connecting part Figure 1 and 2 The upper part of the base faces the cutting tooth head. The base body adapts its structure according to the installation scenario of the cutting tooth head. The main body of the cutting tooth base generally adopts a structure with a frustum at the top and a cylinder at the bottom.

[0035] In this embodiment, the second connecting part includes two parts: a columnar protrusion structure 13 disposed in the middle and an annular protrusion 12 disposed on the outer side. The lower part of the columnar protrusion structure is columnar and the upper part is disc-shaped. The side edge of the middle protrusion structure has a gradually changing or stepped structure, extending outwards towards the side closer to the cutting tooth head. Conversely, the annular protrusion contracts inwards towards the side closer to the cutting tooth head. In this way, after the connecting material is cast between the cutting tooth head and the cutting tooth seat, the middle protrusion structure and the outer annular protrusion will tightly lock the connecting part cast between the two.

[0036] The connector is geometrically interlocked with the cutting tooth head and the cutting tooth base.

[0037] The materials used in the cutting tooth head of this utility model include, but are not limited to, one or a mixture of several of the following: cemented carbide, ceramic materials, high-manganese steel, and high-chromium steel. The materials used in the cutting tooth base of this utility model include, but are not limited to, one or a mixture of several of the following: low-carbon steel, ductile iron, etc. The materials used in the connecting body of this utility model are elemental materials or aluminum alloy materials, including but not limited to the same / different types of steel as the base, and metals such as Cu, Ni, and Al.

[0038] In addition, the material used for the surface layer of the connector can be a composite material, including but not limited to alloy steel and particle composite materials, such as high chromium cast iron Cr28 and alumina particles, manganese steel NM600 and YG6 particles, stainless steel and ZTA particles, etc.

[0039] The cutting tip is a mushroom-shaped cutting tip made of cemented carbide.

[0040] The first connecting portion includes a first columnar protrusion structure located in the middle and a first annular protrusion structure located on the outer side of the bottom of the first connecting portion. The end of the first columnar protrusion structure expands outward, while the end of the first annular protrusion structure contracts inward. The connecting material can be extruded into the embedded area enclosed by the first columnar protrusion structure and the first annular protrusion structure by casting or hot forging, and then solidifies after cooling. When the cutting tooth is subjected to force transmitted to the connecting material, if the cutting tooth tends to detach from the cutting tooth structure, since the cross-section of the end of the first columnar protrusion structure is inverted trapezoidal, the portion of the cutting tooth structure extending between the first columnar protrusion structure and the annular protrusion of the cutting tooth will tend to expand. However, the annular protrusion, due to its inward contraction, precisely suppresses this expansion tendency, resulting in a better fixing effect between the two.

[0041] Those skilled in the art should understand that the materials for cutting teeth include, but are not limited to, one or a mixture of several of cemented carbide, ceramic materials, diamond, high manganese steel, and high chromium steel.

[0042] Cutting tooth holder

[0043] The cutting tooth holder is cylindrical at the bottom and frustum-shaped at the top.

[0044] It is important to note that during the fabrication of the cutting tooth holder, the holder should have a protruding structure with a gradually increasing diameter at least in the middle. That is, the end of the protruding structure should have an outwardly expanding region in the shape of a disc, spherical crown, or mushroom head, which can also be called an enlarged portion. The side edges of the second protruding structure in the middle should have an expanding trend, which can be gradually expanding or gradient expanding, extending outwards more towards the side closer to the cutting tooth head.

[0045] Preferably, an annular protrusion is provided on the outer side of the connecting end of the cutting tooth holder. In contrast to the second protrusion-like structure in the middle, the second annular protrusion tapers inward as it gets closer to the cutting tooth head.

[0046] The base material of this utility model includes, but is not limited to, one or a mixture of several of low-carbon steel, ductile iron, etc.

[0047] Preferably, the surface of the cutting tip is coated with a film layer that matches the bonding material. The cutting tip is placed in a vacuum evaporation chamber, and vacuum evaporation is performed under the following conditions:

[0048] Vacuum degree ≤ -0.1MPa, temperature 600-1200℃, time 0.1-200h, the vapor deposition material is the same as or similar to the bonding material. For example, if the bonding material is iron, aluminum alloy, or titanium alloy, then the vapor deposition material is also the corresponding material. Thus, a bonding film is formed on the surface of the alloy steel tooth. Through vapor deposition, the bonding material can better bond with the cutting tooth in the subsequent bonding process, increasing the bonding strength.

[0049] Connection between tooth head and base

[0050] Assemble the cutting tooth head and tooth holder by placing them into the mold according to the design position. Pour molten or semi-molten connecting material into the mold between the two, and after solidification, the connection between the tooth head and the tooth holder is achieved. The semi-molten part mentioned here refers to the material not reaching the point of complete melting, but the hardness has been significantly reduced. Place the formed connecting material between the tooth head and the tooth holder, and use external force to squeeze the connecting material into the gap between the tooth head and the tooth holder, and then further shape it.

[0051] Preferably, the melting point of the connecting material is lower than the melting point of the materials of the cutting tooth holder and the cutting tooth head.

[0052] The surface layer 4 of the bonding material can be a composite material, including but not limited to alloy steel and particulate composite materials, such as high chromium cast iron Cr28 and alumina particles, manganese steel NM600 and YG6 particles, stainless steel and ZTA particles, etc.

[0053] The materials for each part of this utility model can be selected as follows:

[0054] 1. Cutting teeth: made of cemented carbide, ceramic or special alloy steel, such as tungsten carbide (WC-Co), for high-strength and wear-resistant cutting work.

[0055] 2. Connecting materials: such as stainless steel, high manganese steel, cast iron, copper alloy, titanium alloy or aluminum alloy, used for transition connection between the cutting tooth head and the cutting tooth seat.

[0056] 3. Cutting Tooth Seat: Made of steel, it can be the same as or different from the connecting material, and is used for support and shock absorption.

[0057] 4. Surface layer of bonding material: such as high-chromium cast iron Cr28 and alumina particles, used to protect the bonding material and improve wear resistance. The thickness of the surface layer is 0.01-100mm. It is important that the surface layer of the bonding material is formed on the surface of the bonding material after the entire structure is completed. The aforementioned bonding film layer is formed by vapor deposition on the surface of the cutting tooth, especially at the connecting end of the cutting tooth, before the cutting tooth is bonded to the bonding material.

[0058] Example 2

[0059] Figure 5 This is a variant of Example 1, wherein the structure of the cutting tooth holder is the same as that of Example 1, except that the cutting tooth head is different from that of Example 1. The protruding structure in the middle of the cutting tooth head in Example 1 is omitted, and only the annular protrusion on the outside is retained. The structure of the connector is also adapted because it is formed by casting.

[0060] Example 3

[0061] Figure 6 This is a variant of Example 1, wherein the structure of the cutting tooth holder is the same as that of Example 1, except that the cutting tooth head is different from that of Example 1. The protruding structure in the middle of the cutting tooth head in Example 1 is omitted, and only the outer annular protrusion is retained. Furthermore, the shape of the hollow region in the middle is adjusted relative to Example 3. The structure of the connector is also adapted because it is formed by casting or forging.

[0062] Example 4

[0063] Figure 7 This is another variant of Example 1, wherein the structure of the cutting tooth holder is the same as that of Example 1, except that the cutting tooth head is different from that of Example 1, and the cross-sectional shape of the cutting tooth head has been adjusted relative to Example 1.

[0064] Example 5

[0065] Figure 8 This is another variant of Example 1, wherein the structure of the cutting tooth holder is the same as that of Example 1, except that the cutting tooth head is different from that of Example 1, and the cross-sectional shape of the cutting tooth head has been adjusted relative to Example 1.

[0066] Example 6

[0067] Figure 9 This is another variant of Example 1, wherein the cutting tooth head structure is the same as that of Example 1 or adopts the structure in Examples 3-6, and the cross-sectional shape of the cutting tooth seat is adjusted.

[0068] Application examples:

[0069] This utility model's cutting tooth structure, consisting of a cutting tooth head, connecting material, and cutting tooth base, can be applied to:

[0070] 1. Mining and Tunneling: Highly wear-resistant tool parts used in mining and tunneling equipment, such as cutting teeth, drill bits, and tunneling teeth.

[0071] 2. Machining: Used to manufacture cutting tool parts that require high wear resistance, such as milling cutters and turning tools.

[0072] 3. Construction Engineering: High-stress, high-wear components used in construction machinery, such as crushers and bucket teeth.

[0073] Although the principles of this utility model have been described in detail above with reference to preferred embodiments, those skilled in the art should understand that the above embodiments are merely illustrative explanations of the implementation of this utility model and are not intended to limit the scope of this utility model. The details in the embodiments do not constitute a limitation on the scope of this utility model. Any obvious changes, such as equivalent transformations or simple substitutions, based on the technical solution of this utility model without departing from its spirit and scope fall within the protection scope of this utility model.

Claims

1. An improved cutting tooth structure, characterized in that, The cutting tooth structure includes: The cutting tooth head, the cutting tooth base, and the connecting body are provided. One end of the cutting tooth head is arc-shaped, and the other end is provided with a first connecting portion. The cutting tooth base includes a base body and a second connecting portion. The first connecting portion and the second connecting portion extend toward the central connecting body. The connecting body has a recessed area that matches the shape of the first connecting portion and the second connecting portion. The first connecting portion and the second connecting portion are respectively embedded in the recessed area of ​​the connecting body. At least a portion of the end area of ​​the first connecting portion and the second connecting portion is larger than the size of its front end or middle portion.

2. The improved cutting tooth structure according to claim 1, characterized in that, The first connecting portion includes a first columnar protrusion structure disposed in the middle and a first annular protrusion structure disposed outside the first columnar protrusion structure. The end of the first columnar protrusion structure expands outward and the end of the first annular protrusion structure contracts inward. And / or, the second connecting portion includes a second columnar protrusion structure disposed in the middle and a second annular protrusion structure disposed outside the second columnar protrusion structure. The end of the second columnar protrusion structure expands outward and the end of the second annular protrusion structure contracts inward.

3. The improved cutting tooth structure according to claim 1, characterized in that, The ends of the first connecting part and the second connecting part are inverted trapezoidal, spherical, or disc-shaped.

4. The improved cutting tooth structure according to claim 1, characterized in that, The connector is integrally cast between the cutting tooth head and the cutting tooth base.

5. The improved cutting tooth structure according to claim 4, characterized in that, At least one surface of the first connecting part and the second connecting part is covered with a connecting film layer, which is made of the same or compatible material as the connecting body.

6. The improved cutting tooth structure according to claim 4, characterized in that, The outer side of the main body of the connector is provided with a connecting material surface layer, which is a coating layer made of wear-resistant material.

7. The improved cutting tooth structure according to claim 1, characterized in that, The first and second connecting portions extend towards the ends in a progressive or stepped manner, with their cross-sectional dimensions gradually increasing.

8. The improved cutting tooth structure according to claim 1, characterized in that, The connector is integrally cast between the cutting tooth and the steel base.

9. The improved cutting tooth structure according to claim 1, characterized in that, The cutting head is made of cemented carbide, ceramic or special alloy steel, and the connecting body is made of stainless steel, high manganese steel, cast iron, copper alloy, titanium alloy or aluminum alloy.

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