Roller

Abstract

The invention provides a roller which comprises a roller assembly, the roller assembly comprises a roller body, a center shaft, an inner flow channel, a first rotating connector, a second rotating connector, a cooling liquid input pipeline and a cooling liquid output pipeline, the center shaft is connected to the two ends of the roller body, and the inner flow channel is arranged in the center shaft and keeps consistent with the center line of the center shaft; the first end of the first rotating joint and the first end of the second rotating joint are respectively connected with the central shaft, the second end of the first rotating joint and the second end of the second rotating joint are respectively connected with the cooling liquid input pipeline, and cooling liquid enters the inner flow channel through the cooling liquid input pipeline and flows out from the cooling liquid output pipeline; and the shading assembly comprises a curved-surface shading plate, and the curved-surface shading plate is arranged between the laser reflection light path channel and the roller body and used for shading the reflected laser to reduce heat input of the roller body. According to the roller, the problem of overheating burning loss of reflected laser to the roller is solved, and the stability and reliability of material increase-rolling compounding are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and provides a rolling mill roll. Background Art

[0002] The laser directed energy deposition - synchronous rolling composite manufacturing technology significantly improves the microstructure of the processed material by applying plastic deformation during the additive manufacturing process, and enhances the mechanical properties and fatigue life of the additive component.

[0003] However, this technology faces serious problems caused by low laser energy absorption rate and high reflectivity. During the laser additive process, although the laser energy beam has an extremely high energy density, the absorption rate of the metal powder or wire is relatively low, resulting in most of the energy being reflected to the surface of the equipment. Especially during synchronous rolling, the laser energy reflection received by the rolling mill roll is particularly significant. This continuous reflection of energy not only causes overheating and burning damage to the surface of the rolling mill roll, but also severely damages the surface morphology, forming irregular pits, protrusions and other defects. These surface defects will destroy the uniformity and stability of the entire rolling process, seriously affecting the reliability of the laser directed energy deposition - synchronous rolling composite manufacturing technology and the stability of its industrial application.

[0004] To solve this problem, eliminate the damage of the reflected laser to the surface of the rolling mill roll, reduce the thermal load, and enhance the equipment life and processing accuracy, the prior art usually uses cooling water to cool the surface of the rolling mill roll, but this method can only partially alleviate the high-temperature burning damage and cannot fundamentally solve the problem. In addition, individual technologies use high-reflectivity material coatings or special cooling systems to enhance the heat dissipation effect, but this cannot completely solve the overheating problem, and these methods are often complex to operate and costly. Therefore, it is crucial to develop a more efficient, stable and cost-effective solution to better realize the industrial application of the laser directed energy deposition - synchronous rolling composite manufacturing technology. Summary of the Invention

[0005] Embodiments of the present invention provide a rolling mill roll for solving the problem of overheating and burning damage of the rolling mill roll caused by the reflected laser during the laser directed energy deposition - synchronous rolling composite manufacturing process.

[0006] Embodiments of the present invention provide a rolling mill roll, comprising: Roller assembly, the roller assembly includes a roller body, a central shaft, an internal flow channel, a first rotary joint, a second rotary joint, a coolant input pipeline, and a coolant output pipeline. The central shaft is connected to both ends of the roller body. The internal flow channel is arranged inside the central shaft and is aligned with the central axis of the central shaft. The first end of the first rotary joint and the first end of the second rotary joint are respectively connected to the central shaft. The second end of the first rotary joint and the second end of the second rotary joint are respectively connected to the coolant input pipeline. The coolant enters the internal flow channel through the coolant input pipeline and flows out from the coolant output pipeline; Light-shielding assembly, the light-shielding assembly includes a curved light-shielding plate. The curved light-shielding plate is arranged between the laser reflection light path channel and the roller body to block the reflected laser to reduce the heat input to the roller body. According to an embodiment of the present invention, the diameter of the central shaft is D1, the cross-sectional diameter of the internal flow channel is D2, and D2 ≤ 0.5D1.

[0007] According to an embodiment of the present invention, during the operation of the first rotary joint and the second rotary joint, the first ends of the first rotary joint and the second rotary joint rotate, and the second ends of the first rotary joint and the second rotary joint remain stationary.

[0008] According to an embodiment of the present invention, the light-shielding assembly further includes a first connecting bracket and a second connecting bracket that are detachably connected. The second connecting bracket is detachably connected to the roller bracket. The first connecting bracket and the second connecting bracket jointly fix the light-shielding assembly.

[0009] According to an embodiment of the present invention, the light-shielding assembly further includes a cooling channel. The cooling channel is a cylindrical through hole. During operation, circulating coolant is introduced into the cooling channel to reduce the temperature of the curved light-shielding plate.

[0010] According to an embodiment of the present invention, the light-shielding assembly further includes a heat sink. The curved light-shielding plate and the heat sink are made of pure copper or copper alloy materials.

[0011] According to an embodiment of the present invention, the curved light-shielding plate and the heat sink are connected by welding or bolts to form an integral structure.

[0012] According to an embodiment of the present invention, the roller body and the central shaft are integrally formed.

[0013] According to an embodiment of the present invention, the coolant includes a water-based coolant.

[0014] According to an embodiment of the present invention, the roller body is made of high-strength alloy steel with a surface hardening treatment to improve the wear resistance and burning resistance of the roller body.

[0015] According to the roller provided by the embodiment of the present invention, the coolant circulation system of the roller assembly can efficiently remove the heat of the roller body during the rolling process. Since the inner flow channel is consistent with the center line of the central axis, the coolant can flow evenly in the central axis to ensure that all parts of the roller body are fully cooled, thereby effectively avoiding the problem of roller deformation and aggravated wear caused by local overheating, and improving the service life of the roller. Stable temperature control helps to improve the quality of rolled products. Overheated rollers may cause uneven thermal deformation of materials, affecting the dimensional accuracy and surface quality of products. The cooling system of the present invention can keep the roller body within a suitable operating temperature range, ensuring the stability of the rolling process and the consistency of product quality. The curved shading plate of the shading assembly can effectively block the reflected laser and reduce the heat input of the roller body. In the rolling process involving laser processing, the reflected laser may cause the local temperature of the roller body to rise, affecting the performance and life of the roller. By setting a curved shading plate, this thermal impact can be minimized, further improving the stability and reliability of the roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the 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 creative work.

[0017] Figure 1 It is a schematic front view of the shading structure provided by the present invention.

[0018] Figure 2 It is a schematic side view of the shading structure provided by the present invention.

[0019] Figure 3 It is a schematic top view of the shading structure provided by the present invention.

[0020] Figure 4 It is a schematic front view of the roller body provided by the present invention.

[0021] Figure 5 It is a schematic side view of the roller body provided by the present invention.

[0022] Figure 6 It is a schematic stereoscopic diagram of the roller body provided by the present invention.

[0023] Reference numerals: 100, roll body; 102, central shaft; 104, internal flow channel; 106, light-shielding component; 108, curved light-shielding plate; 110, first connection bracket; 112, second connection bracket; 114, cooling channel; 116, heat sink. Detailed implementation mode

[0024] The following further describes in detail the implementation mode of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0025] As Figures 1 to 6 shown, the embodiment of the present invention provides a roll, including: A roll assembly, the roll assembly includes a roll body 100, a central shaft 102, an internal flow channel 104, a first rotary joint, a second rotary joint, a coolant input pipeline and a coolant output pipeline. The central shaft 102 is connected to both ends of the roll body 100. The internal flow channel 104 is arranged inside the central shaft 102 and is aligned with the central axis of the central shaft 102. The first end of the first rotary joint and the first end of the second rotary joint are respectively connected to the central shaft 102. The second end of the first rotary joint and the second end of the second rotary joint are respectively connected to the coolant input pipeline. The coolant enters the internal flow channel 104 through the coolant input pipeline and flows out from the coolant output pipeline; A light-shielding component 106, the light-shielding component 106 includes a curved light-shielding plate 108. The curved light-shielding plate 108 is arranged between the laser reflection light path channel and the roll body 100 for shielding the reflected laser to reduce the heat input of the roll body 100.

[0026] According to the roll provided by the embodiment of the present invention, the coolant circulation system of the roll assembly can efficiently take away the heat generated by the roll body 100 during the rolling process. Since the internal flow channel 104 is aligned with the central axis of the central shaft 102, the coolant can flow evenly inside the central shaft 102, ensuring full cooling of all parts of the roll body 100, thereby effectively avoiding problems such as roll burnout, deformation and increased wear caused by local overheating, and improving the service life of the roll. Stable temperature control helps to improve the quality of the rolled products. An overheated roll may cause uneven thermal deformation of the material, affecting the dimensional accuracy and surface quality of the products. The cooling system of the present invention can keep the roll body 100 within a suitable working temperature range, ensuring the stability of the rolling process and the consistency of the product quality. The curved light-shielding plate 108 of the light-shielding component 106 can effectively shield the reflected laser, reducing the heat input of the roll body 100. In the rolling process involving laser processing, the reflected laser may cause a local temperature rise of the roll body 100, affecting the performance and life of the roll. By setting the curved light-shielding plate 108, this thermal influence can be minimized, further improving the stability and reliability of the roll.

[0027] Reducing the heat effect of the laser can also reduce the expansion and contraction of the rolls caused by temperature changes, thereby improving the accuracy of the rolling process and the dimensional accuracy of the product.

[0028] Please continue to see Figures 1 to 6 The roller provided in the embodiment of the present invention is a device with special cooling and shading functions, and is mainly composed of two parts: a roller assembly and a shading assembly 106.

[0029] Specifically, the roller assembly mainly includes a roller body 100, a central shaft 102, an inner flow channel 104, a first rotary joint, a second rotary joint, a coolant input pipeline and a coolant output pipeline.

[0030] The roller body 100 is the part of the roller that directly participates in the rolling process, is in direct contact with the material to be processed, and achieves rolling deformation of the material through rotation.

[0031] The central shaft 102 is connected to both ends of the roller body 100, providing support and a rotation axis for the roller body 100. The central shaft 102 plays a role in stabilizing and transmitting power in the entire roller structure, ensuring that the roller body 100 can rotate smoothly and accurately.

[0032] The inner flow channel 104 is disposed inside the central axis 102, and its center line is consistent with the center line of the central axis 102. This design can ensure that the coolant flows evenly inside the central axis 102, and effectively removes the heat generated by the roller body 100.

[0033] The first rotary joint and the second rotary joint play the role of connection and transition. Their first ends are respectively connected to the central shaft 102, and their second ends are respectively connected to the coolant input pipeline. The existence of the rotary joint allows the coolant input pipeline to remain relatively still while the central shaft 102 rotates, thereby achieving smooth delivery of the coolant.

[0034] The coolant enters the inner flow channel 104 through the coolant input pipeline, absorbs the heat generated by the roller body 100 in the inner flow channel 104, and then flows out from the coolant output pipeline, thereby forming a complete coolant circulation system to achieve continuous cooling of the roller body 100.

[0035] The shading assembly 106 is mainly used to solve the thermal impact of the reflected laser on the roller body 100 during the laser processing process. The shading assembly 106 is composed of a curved shading plate 108, which is arranged between the laser reflection light path channel and the roller body 100. Its curved surface design can better adapt to the path of laser reflection, effectively block the reflected laser, and prevent it from directly irradiating the roller body 100.

[0036] According to an embodiment of the present invention, the diameter of the central shaft 102 is D1, the cross-sectional diameter of the internal flow channel 104 is D2, and D2 ≤ 0.5D1.

[0037] In an embodiment of the present invention, the central shaft 102, as a key component for carrying the roll body 100 and providing rotational support for it, has its diameter defined as D1. And the internal flow channel 104 located inside the central shaft 102, which undertakes the task of coolant circulation, has a cross-sectional diameter of D2. This embodiment specifically stipulates that the condition D2 ≤ 0.5D1 needs to be satisfied between D2 and D1. This means that the cross-sectional diameter of the internal flow channel 104 is relatively small compared to the diameter of the central shaft 102. This design aims to ensure that while the central shaft 102 has sufficient structural strength, it can also reasonably arrange the coolant circulation path. The central shaft 102 needs to bear the huge pressure during the operation of the roll body 100 and various stresses brought about by rotation. If the diameter of the internal flow channel 104 is too large, it will weaken the structural strength of the central shaft 102 and affect the overall stability and reliability of the roll. By restricting the cross-sectional diameter of the internal flow channel 104 to 0.5 times or less of the diameter of the central shaft 102, it is possible to effectively fill and circulate the coolant in the internal flow channel 104 while ensuring the structural integrity of the central shaft 102, so as to achieve the purpose of cooling the roll body 100.

[0038] The structural strength of the central shaft 102 is fully guaranteed. During the operation of the roll, especially under the conditions of high-speed rotation and large rolling forces, sufficient structural strength can prevent problems such as deformation and fracture of the central shaft 102, greatly improving the service life of the roll. For example, in continuous long-term high-intensity rolling operations, the sturdy central shaft 102 can maintain stable operation, avoiding downtime and maintenance caused by its own structural problems, and improving production efficiency. Secondly, the reasonable size of the internal flow channel 104 enables the coolant to maintain an appropriate flow rate and pressure during circulation. The smaller cross-sectional diameter of the internal flow channel 104 helps the coolant to form an appropriate flow rate in a limited space, better taking away the heat transferred from the roll body 100 to the central shaft 102 and enhancing the cooling effect. Moreover, when the coolant flow rate is constant, the smaller cross-sectional area of the internal flow channel 104 can generate a relatively high pressure, prompting the coolant to contact the inner surface of the central shaft 102 more evenly, further improving the cooling uniformity, ensuring that the temperature of each part of the roll body 100 is maintained within a reasonable range, thereby improving the quality of the rolled product and reducing product defects caused by uneven temperature.

[0039] According to an embodiment of the present invention, during the operation of the first rotary joint and the second rotary joint, the first end of the first rotary joint and the first end of the second rotary joint rotate, and the second end of the first rotary joint and the second end of the second rotary joint remain stationary.

[0040] In an embodiment of the present invention, the operating modes of the first rotary joint and the second rotary joint have a unique design. During the entire operation of the roll, the first rotary joint and the second rotary joint respectively play key roles. Among them, the first end of the first rotary joint and the first end of the second rotary joint are connected to the central shaft 102. Since the central shaft 102 drives the roll body 100 to be in a continuous rotating state, the first ends of the rotary joints connected thereto also rotate accordingly, so as to ensure that when the central shaft 102 rotates, the coolant delivery channel can rotate flexibly therewith. The second end of the first rotary joint and the second end of the second rotary joint are connected to the coolant input pipeline, and this part remains stationary. This design enables the coolant input pipeline not to rotate at high speed following the central shaft 102, avoiding problems such as entanglement and wear that may be caused by frequent rotation of the pipeline, and ensuring that the coolant can flow smoothly and continuously from the stationary external pipeline into the inner flow channel 104 of the rotating central shaft 102, thereby realizing the continuous and stable cooling function of the roll body 100.

[0041] From the perspective of stability, the stationary second end is connected to the coolant input pipeline, preventing the shaking and instability caused by the rotation of the pipeline, ensuring the smoothness of the coolant supply process, and thus enhancing the reliability of the entire cooling system.

[0042] When the roll works continuously for a long time, the stable coolant supply can continuously take away the heat generated by the roll body 100, avoiding overheating and deformation of the roll caused by cooling interruption or instability, and prolonging the service life of the roll.

[0043] From the aspect of maintenance convenience, since the coolant input pipeline does not need to rotate frequently, the risk of pipeline wear and rupture is reduced, and the maintenance cost and downtime for repair are lowered.

[0044] For example, in industrial production, maintenance personnel do not need to frequently check and replace the damaged coolant pipeline due to rotation, improving production efficiency. In addition, this design also makes the structural design of the rotary joint more reasonable, reducing complex sealing and rotating components, lowering the manufacturing difficulty and cost, while improving the working efficiency and reliability of the rotary joint.

[0045] According to an embodiment of the present invention, the light-shielding assembly 106 further includes a first connection bracket 110 and a second connection bracket 112 that are detachably connected. The second connection bracket 112 is detachably connected to the roll bracket, and the first connection bracket 110 and the second connection bracket 112 jointly fix the light-shielding assembly 106.

[0046] In one embodiment of the present invention, in addition to the curved light-shielding plate 108, the light-shielding component 106 is further provided with a first connecting bracket 110 and a second connecting bracket 112 that are detachably connected. The function of the second connecting bracket 112 is to establish a detachable connection relationship with the roll bracket. This connection method enables the light-shielding component 106 to be stably installed in the overall structure of the roll and can be conveniently disassembled when needed. The first connecting bracket 110 and the second connecting bracket 112 cooperate with each other, and together they play a role in fixing the light-shielding component 106, ensuring that the curved light-shielding plate 108 can be accurately arranged between the laser reflection light path channel and the roll body 100, effectively blocking the reflected laser. This design of fixing the light-shielding component 106 through two detachable connecting brackets not only ensures the firmness of the installation of the light-shielding component 106 but also takes into account its convenience during maintenance and adjustment.

[0047] From the perspective of installation and maintenance, since both the first connecting bracket 110 and the second connecting bracket 112 and the connection between the second connecting bracket 112 and the roll bracket are detachable, the installation, disassembly, and maintenance of the light-shielding component 106 become very convenient. When it is necessary to inspect, clean, or replace the light-shielding component 106, the operator can quickly disassemble it without causing too much impact on other parts of the roll, reducing the maintenance time and workload and improving the production efficiency.

[0048] Considering stability, the two connecting brackets jointly fix the light-shielding component 106, which can ensure that the curved light-shielding plate 108 maintains a stable position during the operation of the roll, effectively blocking the reflected laser, continuously reducing the heat input to the roll body 100, and thus ensuring the working stability and reliability of the roll under working conditions such as laser processing. In addition, the detachable connection design also makes it easier to replace and upgrade the light-shielding component 106. When it is necessary to use a light-shielding component 106 with different specifications or performances, it can be conveniently replaced, enhancing the adaptability and scalability of the roll system.

[0049] According to one embodiment of the present invention, the light-shielding component 106 further includes a cooling channel 114. The cooling channel 114 is a cylindrical through-hole. During the working process, a circulating coolant is introduced into the cooling channel 114 to reduce the temperature of the curved light-shielding plate 108.

[0050] In one embodiment of the present invention, the cooling channel 114 is designed as a cylindrical through-hole, which is ingeniously arranged within the light-shielding component 106. During the operation of the roll, the cooling channel 114 undertakes an important cooling function, and circulating coolant is introduced into it. This design cooperates with the curved light-shielding plate 108 in the light-shielding component 106. The curved light-shielding plate 108 is mainly used to block the reflected laser and reduce the heat input to the roll body 100, while the circulating coolant within the cooling channel 114 is specifically for cooling the curved light-shielding plate 108. Through this design, while the light-shielding component 106 effectively blocks the reflected laser, it can also maintain an appropriate temperature itself, avoiding excessive temperature rise due to long-term absorption of laser, which may affect its light-shielding performance and service life.

[0051] The circulating coolant within the cooling channel 114 can effectively carry away the heat absorbed by the curved light-shielding plate 108, keeping its temperature within a reasonable range. This helps to maintain the stability of the physical and optical properties of the curved light-shielding plate 108, ensuring that it can always efficiently block the reflected laser, continuously reduce the heat input to the roll body 100, and thus guarantee the stable operation of the roll under complex working conditions such as laser processing. It avoids problems such as deformation and damage of the curved light-shielding plate 108 due to long-term high temperature, greatly prolonging the service life of the light-shielding component 106. It reduces the frequent replacement situation due to the damage of the light-shielding component 106, lowers the maintenance cost and downtime, and improves the production efficiency. The stable performance of the light-shielding component 106 and the longer service life enhance the stability of the entire roll system. During the long-term production process, the roll can continuously maintain a good working state, reducing production fluctuations and product quality problems caused by the failure of the light-shielding component 106, which is beneficial to improving the product consistency and the qualified product rate.

[0052] The design of the cooling channel 114 in the form of a cylindrical through-hole is conducive to the uniform flow of the coolant within the channel, forming a good convective heat dissipation effect, further improving the cooling efficiency of the curved light-shielding plate 108, and ensuring the reliability and stability of the cooling effect.

[0053] According to one embodiment of the present invention, the light-shielding component 106 further includes a heat sink 116, and the curved light-shielding plate 108 and the heat sink 116 are made of pure copper or copper alloy materials.

[0054] In an embodiment of the present invention, the heat sink 116 and the curved light shield 108 cooperate together to achieve a better heat dissipation effect. At the same time, for the material selection of the curved light shield 108 and the heat sink 116, it is clearly stipulated that pure copper or copper alloy materials are used. Pure copper or copper alloy has good thermal conductivity and can conduct heat quickly. During the working process of the roll, the curved light shield 108 will absorb the heat generated by the reflected laser, and the heat sink 116 can timely conduct the heat on the curved light shield 108 out. With the cooling effect of the circulating coolant in the cooling channel 114, the temperature of the curved light shield 108 is further reduced. In addition, the heat sink 116 cooperates with components such as the curved light shield 108 and the cooling channel 114 to jointly form a complete heat dissipation system of the light shielding assembly 106, ensuring that the light shielding assembly 106 can effectively play the role of blocking the reflected laser during operation, while maintaining a proper temperature state itself.

[0055] Due to the excellent thermal conductivity of pure copper or copper alloy, the curved light shield 108 and the heat sink 116 can quickly transfer the absorbed heat. This enables the light shielding assembly 106 to quickly and effectively dissipate heat when facing the reflected laser, avoiding excessive temperature caused by heat accumulation, thereby maintaining good light shielding performance, continuously reducing the heat input of the roll body 100, and ensuring the stable operation of the roll. The good heat dissipation effect helps to extend the service life of the curved light shield 108 and the heat sink 116. In a high-temperature environment, materials are prone to performance degradation and damage. However, the high thermal conductivity of pure copper or copper alloy materials and the auxiliary heat dissipation effect of the heat sink 116 reduce the risk of material damage due to high temperature, improve the reliability and stability of the light shielding assembly 106, reduce the frequency of maintenance and replacement, and lower the production cost. The stable and reliable light shielding assembly 106 is crucial for the entire roll system. By effectively reducing the heat input of the roll body 100, the light shielding assembly 106 helps to maintain the normal working temperature of the roll, reduce the roll deformation and wear caused by temperature changes, thereby improving the quality and precision of the rolled product, and enhancing the working efficiency and production benefit of the entire roll system. Pure copper or copper alloy materials not only have good thermal conductivity, but also have certain mechanical strength and corrosion resistance, and can adapt to various complex conditions in the roll working environment. During long-term use, these materials can maintain stable performance, ensuring that the light shielding assembly 106 can always effectively perform its functions and provide reliable guarantee for the normal operation of the roll.

[0056] According to an embodiment of the present invention, the curved light shield 108 and the heat sink 116 are connected by welding or bolts to form an integral structure.

[0057] In one embodiment of the present invention, the curved light-shielding plate 108 and the heat dissipation block 116 can form an integral structure by welding or bolt connection. When using the welding method, a tight bond can be formed between the curved light-shielding plate 108 and the heat dissipation block 116, reducing the thermal resistance during the heat transfer process, ensuring that heat can quickly conduct from the curved light-shielding plate 108 to the heat dissipation block 116, and then be dissipated through the heat dissipation block 116. The bolt connection provides a relatively convenient way for disassembly and maintenance. When it is necessary to inspect, repair or replace components of the light-shielding assembly 106, the curved light-shielding plate 108 and the heat dissipation block 116 can be separated relatively easily. At the same time, during installation, the connection stability between the two can be ensured through reasonable bolt tightening, guaranteeing that during the operation of the roll, the curved light-shielding plate 108 and the heat dissipation block 116 will not become loose due to factors such as vibration, affecting the heat dissipation and light-shielding effects.

[0058] Whether it is welding or bolt connection, it can ensure good contact between the curved light-shielding plate 108 and the heat dissipation block 116, thereby achieving efficient heat conduction. The tight connection method of welding can minimize the thermal resistance to the greatest extent, enabling heat to quickly transfer from the curved light-shielding plate 108 to the heat dissipation block 116, accelerating the heat dissipation speed, effectively reducing the temperature of the curved light-shielding plate 108, better playing its role in blocking and reflecting laser light, and reducing the heat input to the roll body 100. The bolt connection method provides convenience for the maintenance and overhaul of the light-shielding assembly 106. When it is necessary to inspect, replace or repair the curved light-shielding plate 108 or the heat dissipation block 116, the operator can easily remove the bolts and separate the two components without complex operations on the entire light-shielding assembly 106. This greatly shortens the maintenance time, improves production efficiency, and also reduces the maintenance cost. The welded connection can form a firm integral structure, enhancing the mechanical strength and stability of the light-shielding assembly 106, enabling it to still maintain stable performance in the working environment of high-speed rotation and vibration of the roll, ensuring the normal functioning of the heat dissipation and light-shielding functions. And the bolt connection can also provide sufficient connection strength under reasonable tightening, preventing relative displacement between the curved light-shielding plate 108 and the heat dissipation block 116 during operation, ensuring the structural integrity and reliability of the light-shielding assembly 106. Providing two methods of welding and bolt connection allows for the selection of the appropriate connection method according to specific requirements and working conditions in practical applications. For some occasions with extremely high requirements for heat dissipation performance and infrequent disassembly and maintenance, the welding method can be selected; while for working environments that require frequent inspection and maintenance, the bolt connection method can be adopted, reflecting the flexibility in design and the adaptability to different application scenarios of the present invention.

[0059] According to one embodiment of the present invention, the roll body 100 and the central shaft 102 are integrally formed.

[0060] In an embodiment of the present invention, the roll body 100, as a key part directly participating in the rolling work of the roll, and the central shaft 102 provide support and the rotation axis for it. This embodiment clearly stipulates that the roll body 100 and the central shaft 102 are manufactured by an integral molding method. Integral molding means that during the manufacturing process, the roll body 100 and the central shaft 102 are processed and manufactured as a whole, without a traditional connection interface, and a continuous and seamless structure is formed between the two. This integral molding manufacturing method eliminates the possible connection gaps or weak links between the roll body 100 and the central shaft 102, making the structure of the entire roll assembly more compact and stable.

[0061] According to an embodiment of the present invention, the coolant includes a water-based coolant.

[0062] In an embodiment of the present invention, in the working process of the roll assembly, the water-based coolant enters the internal flow channel 104 inside the central shaft 102 through the coolant input pipeline, via the first rotary joint and the second rotary joint. Since a large amount of heat is generated by the roll body 100 during the rolling process and conducted to the central shaft 102, when the water-based coolant flows in the internal flow channel 104, it fully contacts the central shaft 102, absorbs the heat, and then flows out from the coolant output pipeline, completing a cooling cycle, thereby continuously removing the heat generated by the roll body 100 and maintaining the normal working temperature of the roll.

[0063] According to an embodiment of the present invention, the roll body is made of high-strength alloy steel with a hardened surface to improve the wear resistance and anti-burning performance of the roll body.

[0064] In an embodiment of the present invention, the roll body, as the core working component of the roll, its material and performance directly affect the working effect of the roll. This embodiment clearly uses high-strength alloy steel to manufacture the roll body and performs a hardening treatment on its surface. High-strength alloy steel itself has high strength and toughness and can withstand the huge pressure and impact force during the rolling process. And the surface hardening treatment further enhances the performance of the roll body surface. When the roll is working, the roll body directly contacts and generates friction with the material to be processed. The hardened surface can better resist this friction and reduce wear; at the same time, in some high-temperature rolling environments, the hardened surface can also effectively improve the anti-burning ability of the roll body, thus ensuring the normal working of the roll.

[0065] The following explains the examples and comparative examples of the roll provided by the embodiments of the present invention using different process parameters for rolling.

[0066] Example 1 The laser power is 1.2 kW, the laser spot diameter is 2.0 mm, the diameter of the filler wire is 1.2 mm, the wire feeding speed is 8 mm / s, the filler material is ER55 low alloy steel, the additive matrix is a shaft made of EA1N low alloy steel, the scanning speed is 420 mm / s, the roll pressure is 15 kN, and the distance between the laser-wire focusing area and the rolling point is 10 mm. While the laser melts and deposits the metal wire, the roll rolls the high-temperature molten and solidified structure with a preset rolling force of 15 kN and works continuously for 30 minutes.

[0067] Example 2 The laser power is 1.2 kW, the laser spot diameter is 2.0 mm, the diameter of the filler wire is 1.2 mm, the wire feeding speed is 8 mm / s, the filler material is ER55 low alloy steel, the additive matrix is a shaft made of EA1N low alloy steel, the scanning speed is 420 mm / s, the roll pressure is 25 kN, and the distance between the laser-wire focusing area and the rolling point is 10 mm. While the laser melts and deposits the metal wire, the roll rolls the high-temperature molten and solidified structure with a preset rolling force of 25 kN and works continuously for 30 minutes.

[0068] Comparative Example 1 The laser power is 1.2 kW, the laser spot diameter is 2.0 mm, the diameter of the filler wire is 1.2 mm, the wire feeding speed is 8 mm / s, the filler material is ER55 low alloy steel, the additive matrix is a shaft made of EA1N low alloy steel, the scanning speed is 420 mm / s, the roll pressure is 25 kN, and the distance between the laser-wire focusing area and the rolling point is 10 mm. While the laser melts and deposits the metal wire, the roll rolls the high-temperature molten and solidified structure with a preset rolling force of 25 kN and works continuously for 30 minutes.

[0069] Comparative Example 2 The laser power is 1.2 kW, the laser spot diameter is 2.0 mm, the diameter of the filler wire is 1.2 mm, the wire feeding speed is 8 mm / s, the filler material is ER55 low alloy steel, the additive matrix is a shaft made of EA1N low alloy steel, the scanning speed is 420 mm / s, the roll pressure is 25 kN, and the distance between the laser-wire focusing area and the rolling point is 10 mm. While the laser melts and deposits the metal wire, the roll rolls the high-temperature molten and solidified structure with a preset rolling force of 25 kN and works continuously for 30 minutes.

[0070] Comparative Example 3 The laser power is 1.2 kW, the laser spot diameter is 2.0 mm, the diameter of the filler wire is 1.2 mm, the wire feeding speed is 8 mm / s, the filler material is ER55 low alloy steel, the additive matrix is a shaft made of EA1N low alloy steel, the scanning speed is 420 mm / s, the roll pressure is 25 kN, and the distance between the laser-wire focusing area and the rolling point is 10 mm. While the laser melts and deposits the wire, the roll rolls the high-temperature molten and solidified structure with a preset rolling force of 25 kN and works continuously for 30 minutes.

[0071] The comparison results are shown in Table 1 below: Table 1 As can be seen from Table 1, the roll provided by the embodiment of the present invention can effectively protect the roll and avoid overheating and burning of the roll during the laser direct energy deposition-synchronous rolling composite manufacturing. By setting a light-shielding structure in the laser reflection optical path channel between the laser and filler material convergence area and the roll, part of the laser emission energy is absorbed, effectively weakening the reflected laser irradiating on the roll surface and reducing the heat input to the roll; by designing a central through-hole type internal flow channel 104 structure inside the roll and introducing circulating coolant into the flow channel, the roll is cooled in real time to accelerate the heat dissipation of the roll; thus, the heat input to the roll is significantly reduced and the heat dissipation of the roll is promoted, solving the problem of overheating and burning of the roll by the reflected laser during the laser direct energy deposition-synchronous rolling composite manufacturing process, and effectively improving the stability and reliability of the laser direct energy deposition-synchronous rolling composite manufacturing process.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A roll, characterized in that, Comprising: A roll assembly, which includes a roll body (100), a central shaft (102), an internal flow channel (104), a first rotary joint, a second rotary joint, a coolant input pipeline, and a coolant output pipeline. The central shaft (102) is connected to both ends of the roll body (100). The internal flow channel (104) is arranged inside the central shaft (102) and is aligned with the central axis of the central shaft (102). The first end of the first rotary joint and the first end of the second rotary joint are respectively connected to the central shaft (102). The second end of the first rotary joint and the second end of the second rotary joint are respectively connected to the coolant input pipeline. Coolant enters the internal flow channel (104) through the coolant input pipeline and flows out from the coolant output pipeline. A light-shielding assembly (106), which includes a curved light-shielding plate (108). The curved light-shielding plate (108) is arranged between the laser reflection light path channel and the roll body (100) for shielding the reflected laser to reduce the heat input to the roll body (100).

2. A roll according to claim 1, characterized in that, The diameter of the central shaft (102) is D1, and the cross-sectional diameter of the internal flow channel (104) is D2, and D2 ≤ 0.5D1.

3. A roll according to claim 1, characterized in that, During the working process of the first rotary joint and the second rotary joint, the first ends of the first rotary joint and the second rotary joint rotate, while the second ends of the first rotary joint and the second rotary joint remain stationary.

4. A roll according to claim 1, characterized in that, The light-shielding assembly (106) further includes a first connecting bracket (110) and a second connecting bracket (112) that are detachably connected. The second connecting bracket (112) is detachably connected to the roll bracket. The first connecting bracket (110) and the second connecting bracket (112) jointly fix the light-shielding assembly (106).

5. A roll according to claim 1 or 4, characterized in that, The light-shielding assembly (106) further includes a cooling channel (114). The cooling channel (114) is a cylindrical through-hole. During the working process, circulating coolant is introduced into the cooling channel (114) to reduce the temperature of the curved light-shielding plate (108).

6. A roll according to claim 1 or 4, characterized in that, The light-shielding assembly (106) further includes a heat sink (116). The curved light-shielding plate (108) and the heat sink (116) are made of pure copper or copper alloy materials.

7. A roll according to claim 6, characterized in that, The curved light-shielding plate (108) and the heat sink (116) are connected by welding or bolts to form an integral structure.

8. A roll according to any one of claims 1 to 4, characterized in that, The roll body (100) and the central shaft (102) are integrally formed.

9. A roll according to any one of claims 1 to 4, characterized in that The coolant includes water-based coolant.

10. A roll according to any one of claims 1 to 4, characterized in that, The roll body is made of high-strength alloy steel with a hardened surface to improve the wear resistance and anti-burning performance of the roll body.

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