Track wheel manufacturing method and track wheel assembly

Abstract

The present invention relates to the technical field of supporting rollers, and discloses a supporting roller manufacturing method and a supporting roller assembly. The supporting roller manufacturing method includes: using 38MnCrB6 steel to manufacture a first half wheel body and a second half wheel body; heating the first half wheel body and the second half wheel body as a whole to a preset preheating temperature and maintaining preheating for a preset preheating time; docking the preheated first half wheel body and the second half wheel body to form a docked wheel body; welding the joints of the docked wheel bodies to form a welded wheel body; and quenching and tempering the welded wheel body. The present invention uses a specific grade of steel to manufacture the first half wheel body and the second half wheel body, which can effectively reduce the risk of cracking during quenching of the wheel body. At the same time, this material has high hardenability, and the wheel body can be hardened as a whole. After the preheated half wheel body is welded, the risk of cracking in the subsequent steps of the welded wheel body can be further reduced, thereby improving the yield rate of the supporting roller, reducing the processing difficulty, and significantly reducing the manufacturing cost of the supporting roller.

Description

Technical Field

[0001] The present invention relates to the technical field of track wheels, and in particular to a track wheel manufacturing method and a track wheel assembly. Background Art

[0002] With the continuous expansion of mining scale and the continuous advancement of infrastructure construction, the demand for ultra-large excavators is also increasing because the large-scale excavators can improve production efficiency, reduce unit costs, and meet the construction needs of large-scale engineering projects.

[0003] As the weight of ultra-large excavators continues to increase, the requirements for track rollers, a chassis component, are becoming increasingly stringent. Since track rollers are extremely difficult to replace on-site after wear and cracking, they are required to have a longer lifespan and higher reliability. Therefore, the toughness and wear resistance of the wheel body are extremely important.

[0004] At present, in order to meet the use requirements, the existing super-large forged supporting rollers are generally integral wheel bodies. This type of wheel body has more processing steps and is difficult, and the overall forging cost is high. Therefore, the existing integral forged supporting rollers are difficult to manufacture. Summary of the Invention

[0005] In view of this, the present invention provides a method for manufacturing a track roller and a track roller assembly to solve the problem that existing integral forged track rollers are difficult to manufacture.

[0006] In a first aspect, the present invention provides a method for manufacturing a track roller, comprising:

[0007] The first and second wheel halves are manufactured using 38MnCrB6 steel; the first and second wheel halves are heated as a whole to a preset preheating temperature and maintained preheated for a preset preheating time; the preheated first and second wheel halves are butted together to form a butted wheel body; the joints of the butted wheel bodies are welded to form a welded wheel body; and the welded wheel body is quenched and tempered.

[0008] Beneficial effects: The first half wheel body and the second half wheel body are made of a specific brand of steel. This material has a lower carbon content than the 42CrMo commonly used for large wheel bodies. It can not only effectively reduce the risk of cracking during quenching of the wheel body, but also has high hardenability. The wheel body can be hardened as a whole, and the structural strength of the supporting wheel is also high. In addition, before welding, the first half wheel body and the second half wheel body are preheated as a whole. After the half wheel bodies are welded after this preheating, the internal residual stress is small, which can further reduce the risk of cracking of the welded wheel body in the subsequent quenching process. The supporting wheel made by this manufacturing method not only has the strength that meets the use requirements and has a high yield rate, but also its processing difficulty is greatly reduced, thereby significantly reducing the manufacturing cost of the supporting wheel, and effectively solving the problem that the existing integral forged supporting wheel is difficult to manufacture.

[0009] In an optional embodiment, the preheating temperature ranges from 240° C. to 280° C., and the preset preheating time ranges from 2 hours to 3 hours.

[0010] Beneficial effect: Using this preheating parameter can fully preheat the half wheel body, and can make the overall temperature consistency of the half wheel body better.

[0011] In an optional embodiment, the preheated first half wheel body and the second half wheel body are butted and welding is started within 60 seconds.

[0012] Beneficial effect: This method can reduce the heat loss of the half wheel body after preheating, and can prevent the preheated half wheel body from dropping too much in temperature during welding, resulting in a large temperature difference with the welding area after welding.

[0013] In an optional embodiment, before the step of quenching and tempering the welded wheel body, the following steps are further included:

[0014] Place the welding wheel body into the heating device; heat the welding wheel body to a preset insulation temperature and keep it warm for a preset post-weld insulation time; turn off the heating device and allow the welding wheel body in the heating device to cool to a preset cooling temperature.

[0015] Beneficial effect: By keeping the welded wheel body at a preset insulation temperature and allowing it to cool slowly in the heating equipment, the residual stress inside the weld and its surroundings can be further reduced, further reducing the risk of cracking of the welded wheel body during subsequent quenching.

[0016] In an optional embodiment, the holding temperature range is 240°C to 280°C, the holding time after welding ranges from 3 hours to 4 hours, and the preset cooling temperature range is less than or equal to 60°C.

[0017] Beneficial effect: The preset cooling temperature range is less than or equal to 60°C. In this way, the residual stress inside the weld and its surroundings can be fully reduced.

[0018] In an optional embodiment, quenching and tempering the welded wheel body includes:

[0019] The welding wheel body is heated to a preset quenching temperature and kept warm for a preset quenching holding time; the welding wheel body is immersed in the coolant in the cooling tank; the coolant is continuously sprayed to the welding wheel body through the liquid spray port in the cooling tank, and the spray cooling is continued for a preset spray cooling time; the welding wheel body is removed from the cooling tank; the welding wheel body is heated to a preset tempering temperature and kept warm for a preset tempering temperature time.

[0020] Beneficial effects: With this quenching method, the disturbance of the coolant in the cooling tank is relatively large, which can fully and quickly exchange heat with the welded wheel body, so that the welded wheel body can be quickly cooled and fully quenched. The core hardness can also reach above 45HRC, effectively improving the strength of the welded wheel body.

[0021] In an optional embodiment, the injection pressure at the liquid injection port is greater than or equal to 3.5 MPa, and the injection cooling time range is 300 seconds to 330 seconds; and / or, the preset tempering temperature range is 210°C to 230°C, and the preset tempering temperature time range is 2.5 hours to 3.5 hours.

[0022] Beneficial effect: This cooling method can quickly cool the welding wheel body in a short time.

[0023] In an optional embodiment, the first half wheel body has a first docking structure, and the second half wheel body has a second docking structure, and the first half wheel body is coaxially plugged into the second docking structure through its own first docking structure to form a docking wheel body;

[0024] And / or, the 38MnCrB6 steel is rolled round steel; and the steps of using the 38MnCrB6 steel to manufacture the first half wheel body and the second half wheel body include:

[0025] A half-wheel body blank is made of 38MnCrB6 steel by forging; the half-wheel body blank is heated to a preset normalizing temperature and kept warm for a preset normalizing holding time; the preset normalizing temperature range is 870° C. to 890° C., and the preset normalizing holding time range is 3.9 hours to 4.1 hours; the half-wheel body blank is naturally cooled to a preset cooling temperature; and the normalized half-wheel body blank is machined to form a first half-wheel body and a second half-wheel body.

[0026] Beneficial effects: This plug-in fit can effectively improve the coaxiality of the first half wheel body and the second half wheel body after welding. In addition, the normalizing treatment after forging can reduce the risk of cracking in the subsequent welding and quenching processes. The manufacturing process of the first half wheel body and the second half wheel body is simple and reliable.

[0027] In a second aspect, the present invention also provides a track roller assembly, comprising: a track roller, manufactured using the above-mentioned track roller manufacturing method; an axle, on which the track roller is sleeved, and the space between the inner wall of the track roller and the outer peripheral surface of the axle forms an oil chamber for circulating lubricating oil.

[0028] Beneficial effect: This type of track roller assembly does not require an oil passage in the two half-wheel bodies of the track roller, which can greatly reduce the risk of quenching cracking of the track roller.

[0029] In an optional embodiment, the diameter of the track roller is greater than or equal to 300 mm, and the thickness of the track roller is greater than or equal to 70 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic structural diagram of a track wheel according to a method for manufacturing a track wheel according to an embodiment of the present invention;

[0032] Figure 2 The figure is a schematic structural diagram of a track wheel assembly according to an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. First half wheel body; 101. First docking structure; 2. Second half wheel body; 102. Second docking structure; 3. Wheel axle; 4. Oil chamber. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0036] In terms of structure, there are two types of super-large engineering machinery supporting wheels: split welding type and integral forging type; in terms of materials, commonly used ones are SCM440, 15B36Cr, and 42CrMo; in terms of heat treatment process, there are two types: full hardening type with overall quenching + tempering and surface hardening type with wheel body quenching and tempering + surface medium frequency quenching + tempering.

[0037] A monolithic forged structure is often used in related technologies. Because there are no welds, there's no risk of weld cracking. However, the large size of the wheel complicates the forging process, requiring very large forging equipment. Furthermore, the oil reservoir can only be created by machining the center of the wheel bore after forging. Furthermore, the wheel's large size and weight place extremely high demands on the material's hardenability and the quenching, heating, and cooling equipment's capabilities. Consequently, the manufacturing cost of this type of oversized track wheel is very high.

[0038] In related technologies, SCM440, 15B36Cr, and 42CrMo are commonly used as wheel materials. Their common weakness is insufficient hardenability, preventing them from being quenched into fully hardened wheels. Furthermore, Japanese-brand SCM440 and domestic-brand 42CrMo are relatively expensive. Their high carbon content also increases the risk of quenching and welding cracking.

[0039] In related technologies, wheels often undergo a surface-hardening heat treatment process that combines base quenching and tempering with medium-frequency quenching and tempering. However, due to the wheel's excessive size, weight, excessive wall thickness, and insufficient material hardenability, the core of the wheel is difficult to fully harden. Consequently, the core fails to achieve the desired quenched and tempered structure, significantly reducing its strength. Once the hardened layer on the tread wears sufficiently, the wheel's strength drops dramatically, and the wheel will crack during use. An oversized track roller using this heat treatment process experienced cracking and oil leakage after just 6,000 hours, far short of its intended service life of 20,000 hours.

[0040] The track rollers of the present invention adopt a split-welded structure with low manufacturing cost. The wheel body material is 38MnCrB6, which is low in price, has good hardenability, low carbon content, and low risk of quenching cracking and welding cracking. A unique welding process of overall preheating before welding and rapid overall heating, heat preservation, and slow cooling in the furnace after welding is adopted, which further reduces the risk of welding cracking and quenching cracking. The track roller quenching is carried out in a unique and efficient cooling system. After the track rollers are immersed in the coolant, the liquid tank is vigorously stirred as a whole by a large-displacement stirring pump. The wheels are also directly sprayed with strong force by the multi-nozzle spray plates on both sides, so that the track roller body is fully hardened, realizing the manufacture of fully hard super-large track rollers, which will greatly improve the overall strength and service life of the wheels.

[0041] The following combination Figure 1 and Figure 2 , describing embodiments of the present invention.

[0042] According to an embodiment of the present invention, on the one hand, a method for manufacturing a track roller is provided, comprising:

[0043] The first half wheel body 1 and the second half wheel body 2 are made of 38MnCrB6 steel;

[0044] Heat the first half wheel body 1 and the second half wheel body 2 as a whole to a preset preheating temperature and keep preheating for a preset preheating time;

[0045] The preheated first half wheel body 1 and the second half wheel body 2 are docked to form a docked wheel body;

[0046] Welding the joints of the wheel bodies to form a welded wheel body;

[0047] The welded wheel body is quenched and tempered.

[0048] The supporting wheel manufacturing method of this embodiment is applied, and a specific brand of steel is used to manufacture the first half wheel body 1 and the second half wheel body 2. This material has a lower carbon content than the 42CrMo commonly used for large wheel bodies. It can not only effectively reduce the risk of cracking during quenching of the welded wheel body, but also has high hardenability. The wheel body can be hardened as a whole, and the structural strength of the supporting wheel is also high. In addition, before welding, the first half wheel body 1 and the second half wheel body 2 are preheated as a whole. After the half wheel bodies are welded after this preheating, the internal residual stress is small, which can further reduce the risk of cracking of the welded wheel body in the subsequent quenching process. The supporting wheel manufactured using this manufacturing method not only has the strength that meets the use requirements and has a high yield, but also has a greatly reduced processing difficulty, thereby significantly reducing the manufacturing cost of the supporting wheel, and effectively solving the problem that the existing integral forged supporting wheel is difficult to manufacture.

[0049] It should be noted that the track rollers manufactured using the manufacturing method of this embodiment can be used on various types of large-scale engineering machinery, not just ultra-large excavators, but any large-scale engineering machinery that uses track rollers.

[0050] In addition, the manufacturing method of this embodiment is not limited to supporting wheels. Large rotary welded structural components can use this solution to reduce the risk of structural cracking and increase service life.

[0051] In the related art, the split-welded wheel body mainly adopts the form of local preheating before welding, and the weld and its surrounding parts are locally preheated. Since the temperature difference between the weld and the surrounding parts of this type of half wheel body is large, after welding, the heat of the weld will be transferred to the surrounding parts more quickly and exchange heat with the outside world, which will make the weld and its surroundings cool faster. The wheel body welded by this preheating method has a large residual stress at the junction of the weld and the wheel body base material.

[0052] Using the manufacturing method of this embodiment, the first half wheel body 1 and the second half wheel body 2 are preheated as a whole. After the subsequent welding process, the temperature difference between the weld and the surrounding parts is small. The wheel body welded using this preheating method can significantly reduce the residual stress at the junction of the weld and the wheel body base material. Therefore, it can not only reduce the risk of cracking after welding, but also avoid cracking during the subsequent quenching process.

[0053] The comparison of the cracking conditions after quenching the workpiece using local preheating before welding and the workpiece using integral preheating before welding is shown in Table 1 below.

[0054] Table 1 Ultrasonic flaw detection results of local preheating and overall preheating workpieces after quenching

[0055]

[0056] It should be noted that, except for the different preheating methods before welding, the workpieces in the above table have the same manufacturing steps and materials. It can be seen that the crack rate of the wheel body after local flame preheating can reach 20%, while no cracks were detected in the wheel body manufactured using the preheating method before welding of this embodiment.

[0057] Specifically, by adopting the supporting wheel manufacturing method of this embodiment, 38MnCrB6 steel has better economic efficiency and can meet the use requirements of full hardening. In addition, it can effectively improve the yield rate of the supporting wheels. Compared with the supporting wheels in the related art, the supporting wheel manufacturing method of this embodiment can reduce the cost of the supporting wheels by more than 50%.

[0058] In one possible embodiment, the preheating temperature range is 240°C to 280°C, and the preset preheating time range is 2 hours to 3 hours. Using such preheating parameters can fully preheat the half-wheel body and make the overall temperature consistency of the half-wheel body better.

[0059] Specifically, the preheating temperature can be selected as 240°C, 250°C, 260°C, 270°C, 280°C, etc., and the preset preheating time can be 2 hours, 2.2 hours, 2.5 hours, 2.8 hours, 3 hours, etc.

[0060] In one possible embodiment, the preheated first half wheel body 1 and the second half wheel body 2 are docked and welding is started within 60 seconds. In this way, the heat loss of the preheated half wheel body can be reduced, and the temperature of the preheated half wheel body can be prevented from dropping too much during welding, resulting in a large temperature difference with the welding area after welding.

[0061] Specifically, the preheated first half wheel body 1 and the second half wheel body 2 are preferably butted and welded within 30 seconds.

[0062] In a possible embodiment, before quenching and tempering the welded wheel body, the process further includes:

[0063] Place the welding wheel body into the heating equipment;

[0064] Heat the welding wheel body to the preset holding temperature and keep it warm for the preset post-weld holding time;

[0065] Turn off the heating device and allow the welding wheel body in the heating device to cool to the preset cooling temperature.

[0066] By keeping the welded wheel body at a preset holding temperature and allowing it to cool slowly in a heating device, the residual stress inside the weld and its surroundings can be further reduced, further reducing the risk of cracking of the welded wheel body during subsequent quenching.

[0067] It should be noted that after welding is completed, the welding wheel body is placed in the heating device within 60 seconds, preferably within 30 seconds, to start the heat preservation and slow cooling steps.

[0068] Specifically, the heating device is an electric heating furnace, which can be a closed box furnace or a continuous mesh belt furnace.

[0069] In one possible embodiment, the holding temperature range is 240°C to 280°C, the holding time after welding ranges from 3 hours to 4 hours, and the preset cooling temperature range is less than or equal to 60°C. In this way, the residual stress inside the weld and its surroundings can be fully reduced.

[0070] The preset cooling temperature refers to the temperature at which the workpiece is taken out of the furnace or cooled after the furnace is opened, that is, the workpiece is taken out of the heating device for cooling, or the workpiece is cooled after the heating device is turned on.

[0071] Specifically, the holding temperature can be 240°C, 250°C, 260°C, 270°C, 280°C, etc., and the holding time after welding can be 3 hours, 3.2 hours, 3.6 hours, 3.8 hours, 4 hours, etc.

[0072] In one possible embodiment, quenching and tempering the welded wheel body includes:

[0073] Heat the welded wheel body to the preset quenching temperature and keep it warm for the preset quenching holding time;

[0074] Immerse the welding wheel body in the coolant in the cooling tank;

[0075] The cooling liquid is continuously sprayed onto the welding wheel body through the liquid spraying port in the cooling tank, and the cooling is continuously sprayed according to the preset cooling time;

[0076] Taking the welding wheel body out of the cooling tank;

[0077] The welding wheel body is heated to a preset tempering temperature and kept warm for a preset tempering temperature and time.

[0078] With this quenching method, the disturbance of the coolant in the cooling tank is relatively large, which can fully and quickly exchange heat with the welded wheel body, so that the welded wheel body can be quickly cooled and fully quenched. The core hardness can also reach above 45HRC, effectively improving the strength of the welded wheel body.

[0079] Among them, heating the welding wheel body to the preset quenching temperature means heating the welding wheel body so that both the inside and the outside reach the preset quenching temperature; the preset quenching and holding time ranges from 15 minutes to 25 minutes, and the preset quenching and holding time is preferably 20 minutes.

[0080] Furthermore, in the cooling tank, a multi-nozzle spray plate is located on either side of the stop point where the welded wheel body stops after being immersed in the liquid while standing. The number and layout of the nozzles on each plate are determined to ensure that the sprayed coolant has sufficient density and can completely cover half of the wheel body. The distance between the multi-nozzle spray plate and the wheel body surface is not limited and is determined by achieving optimal cooling efficiency.

[0081] A large-displacement cooling stirring pump is installed outside the cooling tank. Its suction and discharge pipes extend into the tank. Specifically, the discharge pipe is extended to the bottom of the tank and faces upward. This powerful, high-displacement discharge from the stirring pump's discharge port stirs the coolant in the cooling tank. Furthermore, the nozzles of the multi-nozzle spray plate in the cooling tank continuously spray coolant directly onto the welding wheel. This allows for rapid heat exchange between the welding wheel and the coolant, resulting in rapid cooling.

[0082] It should be noted that after the welded wheel body is taken out of the cooling tank, the welded wheel body is subjected to a subsequent tempering process within a time not exceeding 4 hours.

[0083] Among them, the preset quenching temperature range is 840℃ to 880℃, and the preset quenching temperature can be 840℃, 845℃, 850℃, 855℃, 860℃, 865℃, 870℃, 875℃ and 880℃, etc.

[0084] In one possible embodiment, the spray pressure at the liquid spray port is greater than or equal to 3.5 MPa, the spray cooling time range is 300 seconds to 330 seconds, the preset tempering temperature range is 210°C to 230°C, and the preset tempering temperature time range is 2.5 hours to 3.5 hours. This cooling method can rapidly cool the welded wheel body in a short time, and the internal stress inside the welded wheel body can be reduced through the subsequent tempering process.

[0085] Specifically, the preset tempering temperature may be 210° C., 215° C., 220° C., 225° C., 230° C., etc., and the preset tempering temperature time may be 2.5 hours, 3 hours, 3.5 hours, etc.

[0086] Preferably, the preset tempering temperature is 220° C., and the preset tempering temperature time is 3 hours.

[0087] The liquid spray port refers to the nozzle on the porous liquid spray plate in the cooling tank.

[0088] Specifically, there is no limitation on the location of the liquid spray port in the cooling tank. It can be a liquid spray port set on the inner wall of the cooling tank, or a liquid spray port set on the infusion pipeline in the cooling tank. The form and location of the liquid spray port can be flexibly set according to needs.

[0089] Specifically, the coolant is a water-soluble quenching coolant with a concentration of 3% to 6%.

[0090] Preferably, the coolant is a water-soluble quenching coolant with a concentration of 4%.

[0091] In one possible embodiment, the first half wheel body 1 has a first docking structure 101, and the second half wheel body 2 has a second docking structure 102. The first half wheel body 1 is coaxially plugged into the second docking structure 102 through its own first docking structure 101 to form a docking wheel body;

[0092] This plug-in fitting form can effectively improve the coaxiality of the first half wheel body 1 and the second half wheel body 2 after welding.

[0093] It should be noted that the first docking structure 101 and the second docking structure 102 may not be provided, and the first half wheel body 1 and the second half wheel body 2 may be fixed at designated positions respectively, and then the joint positions may be welded.

[0094] In one possible implementation, the 38MnCrB6 steel is rolled round steel;

[0095] The steps of using 38MnCrB6 steel to make the first half wheel body 1 and the second half wheel body 2 include:

[0096] The half wheel blank is made of 38MnCrB6 steel by forging;

[0097] Heat the half wheel body blank to the preset normalizing temperature and keep it warm for the preset normalizing holding time;

[0098] The preset normalizing temperature range is 870℃ to 890℃, and the preset normalizing holding time range is 3.9 hours to 4.1 hours;

[0099] Allowing the half wheel body blank to cool naturally to a preset cooling temperature;

[0100] The normalized half wheel blank is machined to form a first half wheel 1 and a second half wheel 2.

[0101] The manufacturing process of the first half wheel body 1 and the second half wheel body 2 is simple and reliable.

[0102] Normalizing after forging can reduce the risk of cracking in subsequent welding and quenching processes.

[0103] Specifically, the normalizing temperature can be 870°C, 875°C, 880°C, 885°C, 890°C, etc., and the preset normalizing holding time can be 3.9 hours, 4 hours, 4.1 hours, etc.

[0104] There is no limitation on the specific value of the preset cooling temperature, and it only needs to be cooled to room temperature.

[0105] According to an embodiment of the present invention, on the other hand, a track roller assembly is provided, which includes: a track roller and an axle 3, the track roller being manufactured using the above-mentioned track roller manufacturing method; the track roller being sleeved on the outer circumference of the axle 3, and the space between the inner wall of the track roller and the outer wall of the axle 3 forming an oil chamber 4, which is used for circulating lubricating oil.

[0106] This type of track roller assembly does not require an oil passage in the two half-wheel bodies of the track roller, which can greatly reduce the risk of quenching cracking of the track roller.

[0107] In a possible implementation manner, the diameter of the track roller is greater than or equal to 300 mm, and the thickness of the track roller is greater than or equal to 70 mm.

[0108] The track wheel assembly of the size of this embodiment can be effectively used in super-large engineering machinery.

[0109] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for manufacturing a track roller, characterized in that: include: The first half wheel body (1) and the second half wheel body (2) are made of 38MnCrB6 steel; Heating the first half wheel body (1) and the second half wheel body (2) as a whole to a preset preheating temperature and maintaining the preheating for a preset preheating time; docking the preheated first half wheel body (1) and the second half wheel body (2) to form a docked wheel body; Welding the joints of the wheel bodies to form a welded wheel body; placing the welding wheel body into a heating device; Heating the welding wheel body to a preset holding temperature and maintaining the temperature for a preset post-weld holding time; Turn off the heating device to cool the welding wheel in the heating device to a preset cooling temperature; quenching and tempering the welded wheel body; The quenching and tempering of the welded wheel body includes: heating the welded wheel body to a preset quenching temperature and keeping the temperature for a preset quenching and holding time; Immersing the welding wheel body in the coolant of the cooling tank; Continuously spraying coolant onto the welding wheel body through the liquid spray port in the cooling tank, and continuously spraying cooling according to a preset spray cooling time; Taking the welding wheel body out of the cooling tank; The welding wheel body is heated to a preset tempering temperature and kept warm for a preset tempering temperature and time.

2. The method for manufacturing a track roller according to claim 1, characterized in that: The preset preheating temperature range is 240° C. to 280° C., and the preset preheating time range is 2 hours to 3 hours.

3. The method for manufacturing a track roller according to claim 1, characterized in that: After preheating, the first half wheel body (1) and the second half wheel body (2) are butted together within 60 seconds and welding begins.

4. The method for manufacturing a track roller according to claim 1, characterized in that: The holding temperature range is 240° C. to 280° C., the holding time after welding ranges from 3 hours to 4 hours, and the preset cooling temperature range is less than or equal to 60° C.

5. The method for manufacturing a track roller according to claim 1, characterized in that: The spray pressure at the liquid spray port is greater than or equal to 3.5 MPa, and the spray cooling time ranges from 300 seconds to 330 seconds; And / or, the preset tempering temperature range is 210° C. to 230° C., and the preset tempering temperature time range is 2.5 hours to 3.5 hours.

6. The method for manufacturing a track roller according to any one of claims 1 to 3, characterized in that: The first half wheel body (1) has a first docking structure (101), the second half wheel body (2) has a second docking structure (102), and the first half wheel body (1) is coaxially plugged into and matched with the second docking structure (102) via its own first docking structure (101) to form the docking wheel body; and / or, The 38MnCrB6 steel is a rolled round steel; The steps of using 38MnCrB6 steel to manufacture the first half wheel body (1) and the second half wheel body (2) include: The half wheel blank is made of 38MnCrB6 steel by forging; Heating the half wheel body blank to a preset normalizing temperature and keeping the temperature constant for a preset normalizing holding time; The preset normalizing temperature range is 870° C. to 890° C., and the preset normalizing holding time range is 3.9 hours to 4.1 hours; Allowing the half wheel body blank to cool naturally to a preset cooling temperature; The half wheel body blank after normalizing is machined to form the first half wheel body (1) and the second half wheel body (2).

7. A track roller assembly, characterized in that: include: A track wheel manufactured by the method for manufacturing a track wheel according to any one of claims 1 to 6; The wheel axle (3) is provided with the supporting roller sleeved on the wheel axle (3), and the space between the inner wall of the supporting roller and the outer peripheral surface of the wheel axle (3) forms an oil cavity (4), and the oil cavity (4) is used for circulating lubricating oil.

8. The track wheel assembly according to claim 7, characterized in that: The diameter of the supporting wheel is greater than or equal to 300 mm, and the thickness of the supporting wheel is greater than or equal to 70 mm.

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