Highly wear-resistant steel roll
By setting an airflow-driven lubrication pin structure inside the roll, a self-lubricating effect on the roll surface is achieved, solving the problems of uneven lubrication and high maintenance costs, and improving the wear resistance and efficiency of the roll.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 三鑫特材(常州)股份有限公司
- Filing Date
- 2025-07-16
- Publication Date
- 2026-06-02
AI Technical Summary
Existing rolls have difficulty in uniformly adhering lubricant during high-speed, heavy-load rolling processes, leading to localized lubrication failure, excessive frictional heat, and a lack of built-in lubrication compensation mechanisms, resulting in high maintenance costs and long downtime cycles.
A high wear-resistant steel roll is designed, which adopts a hollow structure roll body and a replaceable roll sleeve. The lubricating pins are automatically extended on the roll surface by internal airflow to form a uniform distribution of lubricating powder. Combined with the limiting structure and the guide gap, the self-lubricating effect is achieved.
It achieves continuous and uniform lubrication of the roll surface, reduces the coefficient of friction, extends the service life of the roll, and reduces the maintenance frequency, making it suitable for high-load scenarios such as hot rolling of steel and wire forming.
Smart Images
Figure CN224309280U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rolling mill technology, specifically to a high wear-resistant steel rolling mill roll. Background Technology
[0002] High-hardness alloy steel rolls are widely used in steel rolling processes. Common structures include integral quenched rolls, double-layer composite rolls, and high-speed steel coated rolls, typically used in conjunction with external spray systems for lubrication and cooling. Traditional lubrication methods rely on external nozzles to intermittently spray emulsion or oil film onto the roll surface to reduce frictional heat and delay roll surface wear. However, in actual high-speed, heavy-load rolling processes, the sprayed liquid is easily thrown off the roll surface by centrifugal force, making it difficult for the lubricant to adhere evenly. This leads to localized lubrication failure, resulting in roll surface scratches, thermal fatigue cracking, or spalling. Furthermore, existing roll structures generally lack built-in lubrication compensation mechanisms. Once the surface material wears, the entire roll usually needs to be replaced or repaired by offline welding, resulting in high maintenance costs and long downtime.
[0003] To address the aforementioned issues, some technical solutions have attempted to introduce internal cooling channels within the rolls to reduce thermal stress. However, these solutions have not yet achieved the function of directional release of lubricating media within the rolls and automatic interaction with the rolling contact surface. External lubricant spraying methods not only have low utilization rates but also pose environmental risks such as dust splashing and difficulties in pollutant recovery during actual operation. Therefore, there is an urgent need to propose a high-wear-resistant self-lubricating roll structure that is simple in structure, possesses active lubrication capabilities, and provides sustainable wear resistance, in order to improve roll utilization efficiency and extend service life. Utility Model Content
[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.
[0005] Therefore, the technical solution adopted by this utility model is as follows: a high wear-resistant steel roll, including a roll body, a roll sleeve, a lubrication pin assembly, an internal ventilation structure, and a limiting structure. The roll body is a hollow structure with a replaceable roll sleeve fitted on its outer surface. The roll sleeve and roll body have multiple axially evenly distributed microholes. Graphite-based lubrication pins are slidably installed in each microhole, and a positive pressure airflow is input through an air source system to drive the lubrication pins to automatically extend to the working surface, realizing the frictional release of lubricating powder and airflow dispersion.
[0006] In a preferred example, the high wear-resistant steel roll can be further configured such that: the outer circumferential surface of the roll body and the roll sleeve is provided with a plurality of uniformly arranged microholes, the microholes being arranged in a matrix along the roll surface and penetrating between the roll body and the roll sleeve.
[0007] Specifically, this structure enables the lubrication pins to be released synchronously at multiple points, ensuring uniform lubrication of the roll contact surface and improving overall roll pressure stability.
[0008] In a preferred example, the high wear-resistant steel roll can be further configured such that: a hollow cavity is provided inside the roll body, one end of which is connected to an external air source via a rotary joint for continuously inputting positive pressure airflow.
[0009] Specifically, by maintaining a stable air supply through positive pressure airflow during the rotation of the roller, the lubrication pins are automatically extended to the working surface, achieving a continuous and controlled lubrication release process, thus avoiding reliance on an external spray system.
[0010] In a preferred example, the high wear-resistant steel roll can be further configured such that a lubricating pin is slidably disposed within the micropore, the lubricating pin being made of graphite or graphite sintered material, and having a plurality of axially extending guide gaps on its surface for gas guidance and powder dispersion.
[0011] Specifically, the lubricating pin generates controllable wear during contact and friction with the object being rolled, releasing fine particulate lubricating powder. Under the combined action of the guide gap and positive pressure gas, the powder is evenly distributed to the roller surface, improving the lubrication effect of the friction interface.
[0012] In a preferred example, the high wear-resistant steel roll can be further configured such that a limiting plate is provided at the tail of the lubrication pin, the outer diameter of which is larger than the minimum diameter of the micro-hole, forming a physical anti-retraction structure to prevent the lubrication pin from being completely pushed out.
[0013] Specifically, the structure ensures that the lubricating pin maintains a predetermined extension distance under high pressure, preventing the structure from falling off and the function from failing due to excessive release.
[0014] In a preferred example, the high wear-resistant steel roll can be further configured such that: the surface of the lubrication pin is provided with a guide gap and a tail exhaust groove, the guide gap is arranged axially, and the exhaust groove is connected to the inner cavity channel and is located inside the limiting plate.
[0015] Specifically, when the airflow overflows through the guide gap and exhaust groove, it carries the lubricating powder formed by wear to the outer surface of the roller sleeve, forming a self-lubricating layer with air-powder synergistic dispersion, which improves the lubrication effect and avoids lubricant accumulation or offset.
[0016] In a preferred example, the high wear-resistant steel roll can be further configured such that the roll body and the roll sleeve have an interference fit or a detachable connection structure, which facilitates the later replacement of the lubrication pin or the roll sleeve assembly.
[0017] Specifically, this structure facilitates maintenance, reduces the overall replacement frequency, and improves equipment operating efficiency.
[0018] Through the above structural design, this utility model can automatically generate and release lubricating powder during the operation of the roll, forming a continuous and stable self-lubricating effect. At the same time, combined with the composite structure of positive pressure output, limit control, and air-powder synergistic dispersion, it effectively solves the problems of strong lubrication dependence, short service life and high maintenance cost of traditional rolls. It is suitable for continuous high-load scenarios such as hot rolling of steel, wire forming and metallurgical rolling, and has excellent practicality and promotion prospects.
[0019] The beneficial effects achieved by this utility model are as follows:
[0020] 1. In this utility model, by setting a matrix of microholes on the surface of the pressure roller body and the roller sleeve, and setting axially movable graphite lubricating pins in each microhole, combined with the positive pressure airflow drive structure set inside the roller body, the lubricating pins automatically extend and contact the object being pressed during use, forming a powdery lubricating film during the friction process, thereby significantly improving the lubrication performance of the roller surface, effectively reducing the coefficient of friction and roller pressing resistance, and extending the service life of the roller.
[0021] 2. In this utility model, the surface of the lubricating pin is provided with a guide gap and an exhaust groove structure. While the positive pressure gas drives the lubricating pin to be discharged, it forms a surrounding micro-airflow, which can evenly blow and distribute the lubricating powder, effectively avoiding lubricant accumulation or local dry friction. At the same time, the limiting structure set at the tail of the lubricating pin can prevent the lubricating pin from completely coming out of the micro-hole, ensuring the structural safety and continuous and stable lubrication effect of the roll during operation. It has good industrial applicability and promotion value. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;
[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the pressure roller body and the surface lubrication pin recovery and ejection state according to an embodiment of the present invention;
[0024] Figure 3 This is a schematic diagram of the surface structure of a lubricating pin according to an embodiment of the present invention.
[0025] Figure label:
[0026] 100. Pressure roller body; 110. Roller sleeve; 120. Micro-hole; 200. Rotary joint; 300. Lubrication pin; 310. Guide gap; 320. Limiting plate; 330. Exhaust groove. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.
[0028] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.
[0029] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a high wear-resistant steel roll.
[0030] Combination Figures 1-3 As shown, the present invention provides a high wear-resistant steel roll, including a roll body 100, a roll sleeve 110, a lubrication pin 300, a rotary joint 200, and several micro-holes 120, a guide gap 310, a limiting plate 320, and an exhaust groove 330 that cooperate with it.
[0031] The pressure roller body 100 is an integral hollow structure with a through hollow cavity along the axial direction inside to accommodate positive pressure airflow. A roller sleeve 110 is fitted onto the outer surface of the pressure roller body 100. The roller sleeve 110 and the pressure roller body 100 are either interference-fitted or detachable for easy maintenance and replacement. A plurality of microholes 120 are evenly distributed on the outer circumferential surfaces of the pressure roller body 100 and the roller sleeve 110. The microholes 120 are arranged in an array, preferably in a matrix arrangement, including a quincunx pattern or a linear array, to achieve uniform distribution of lubrication points.
[0032] like Figure 2 As shown, the aperture size of the micro-hole 120 matches that of the lubrication pin 300. The micro-hole 120 is radially penetrating and communicates with the hollow cavity inside the pressure roller body 100. One end of the hollow cavity is connected to an external air source through a rotary joint 200, which can continuously input positive gas pressure into the hollow cavity when the roller is working. The air source system can provide a stable gas pressure in the range of 0.05 MPa to 0.15 MPa and maintain continuous pressure supply while the pressure roller is rotating.
[0033] A lubricating pin 300 is slidably installed within the micropore 120. Each lubricating pin 300 is an elongated columnar component, the axial length of which is greater than the depth of the micropore 120. The lubricating pin 300 is preferably made of graphite or graphite-based sintered material, possessing good wear resistance and self-lubricating properties. Multiple axially extending guide gaps 310 are provided on the outer surface of the columnar body of the lubricating pin 300. The guide gaps 310 can be groove structures with rectangular or semi-circular cross-sections, used to guide airflow outwards along the surface of the lubricating pin 300.
[0034] like Figure 3As shown, the tail of the lubricating pin 300 is connected to a limiting plate 320. The limiting plate 320 is a disc-shaped structure with an outer diameter larger than the minimum diameter of the micro-hole 120, forming a physical anti-retraction structure. The limiting plate 320 is also provided with an exhaust groove 330 to help form a stable exhaust channel. Through the cooperation of the limiting plate 320, when the lubricating pin 300 is pushed out by a positive pressure airflow, its tail can be limited and engaged with the opening of the micro-hole 120, thereby preventing the lubricating pin 300 from completely falling off due to excessive pushing force.
[0035] In operation, positive pressure gas is input into the hollow cavity of the pressure roller body 100 through the rotary joint 200, and applies pneumatic force to the lubrication pin 300 through the micro-holes 120, causing the lubrication pin 300 to be discharged from the micro-holes 120 and extend to the outer surface of the roller sleeve 110. The outer end face of the lubrication pin 300 contacts the surface of the object being rolled in the extended state, generating controllable wear during the rolling process and releasing graphite powder lubricating material; the positive pressure airflow overflows through the guide gap 310 and the exhaust groove 330, carrying the lubricating powder and dispersing it to the surface of the pressure roller, realizing the automatic and continuous lubrication function of the roller surface.
[0036] The number of lubrication pins 300 can be set to at least 50 according to working conditions, and they are evenly distributed in a matrix on the working surfaces of the pressure roller body 100 and the roller sleeve 110 to ensure uniform lubrication points and consistent effects in the roller pressing area. This structure achieves quantitative output, uniform distribution and effective restriction of lubricating material through a combination of positive pressure drive, flow guidance control and limit constraint, and features compact structure, stable operation and reliable lubrication.
[0037] In summary, this embodiment fully supports all the technical features and their combinations described above, effectively improving the wear resistance, self-lubrication capability, and ease of maintenance of the roll structure, and is suitable for various hot rolling of steel and continuous rolling operations of non-ferrous metals.
[0038] Working principle and usage process of this utility model:
[0039] This invention provides a high wear-resistant self-lubricating steel roll, which achieves continuous lubrication and enhanced wear resistance of the roll surface by constructing an internal airflow drive structure and a lubrication pin 300 arrangement mechanism, making it suitable for heavy-duty continuous rolling environments.
[0040] During operation, the air supply system continuously supplies positive pressure gas into the hollow cavity inside the pressure roller body 100 through the rotary joint 200. This gas maintains a stable pressure supply during the rotation of the pressure roller, forming a constant positive pressure environment inside the roller. The positive pressure gas applies axial pneumatic force to each lubrication pin 300 through multiple micro-holes 120 channels provided on the surfaces of the pressure roller body 100 and the roller sleeve 110.
[0041] Under positive pressure, the lubricating pin 300 is pushed outward along the micro-hole 120, gradually exiting from the inside of the micro-hole, and the outer end face of the lubricating pin 300 extends beyond the surface of the roller sleeve 110 to form direct contact with the object being rolled. When the pressure roller performs rolling operations, the exposed part of the lubricating pin 300 gradually undergoes slight wear during the contact friction with the surface of the processed material. Under the action of shear force, the graphite lubricating pin 300 releases fine powdered graphite lubricant, which is evenly adhered to the contact area between the roller and the material.
[0042] Meanwhile, since the surface of the lubricating pin 300 is provided with a guide gap 310 distributed along the axial direction, and the tail of the lubricating pin is provided with an exhaust groove 330, the positive pressure gas can continuously overflow from the guide gap 310 and the exhaust groove 330, forming a micro airflow jet effect around the discharged lubricating powder, further uniformly blowing the powder to the working surface of the roll, forming a stable self-lubricating distribution layer, thereby effectively reducing the frictional resistance and surface adhesion during the rolling process.
[0043] To prevent the lubricating pin 300 from completely detaching from the microporous structure due to continuous pushing, a limiting plate 320 is provided at its tail. Through physical limiting cooperation with the inner wall of the microporous, it is ensured that the lubricating pin 300 can only extend a predetermined length under air pressure, thus ensuring structural stability and continuous lubrication.
[0044] After prolonged operation, the lubrication pin 300 shortens due to continuous wear, but the airflow drive still allows it to continue being pushed to the preset position until the lubrication pin is completely consumed and then replaced through the micro-hole end. The entire structure can continuously achieve self-lubrication without interrupting the rolling operation, effectively extending the roll life, improving product surface quality, and reducing maintenance frequency.
[0045] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A high wear-resistant steel roll, characterized in that, include: The pressure roller body (100) has a roller sleeve (110) fitted on its outer surface. The outer circumferential surfaces of the pressure roller body (100) and the roller sleeve (110) are provided with a plurality of uniformly arranged microholes (120). The pressure roller body (100) has a through hollow cavity inside, and one end of the hollow cavity is connected to an external air source through a rotary joint (200) for inputting positive pressure airflow into the cavity. A lubricating pin (300) is slidably installed inside the micropore (120). The surface of the lubricating pin (300) is provided with a guide gap (310) extending along the axial direction, and a limiting plate (320) is connected to the bottom. The lubricating pin (300) can be pushed out of the micropore (120) to the outside of the roller sleeve (110) under the action of the positive pressure airflow; After the lubricating pin (300) is extended, its outer end face contacts and rubs against the object being rolled, causing the lubricating pin (300) to wear and generate lubricating powder during operation; positive pressure airflow overflows through the guide gap (310) and exhaust groove (330), carrying out the lubricating powder and dispersing it to the surface of the roller sleeve (110) to achieve self-lubrication; the limiting plate (320) is used to prevent the lubricating pin (300) from completely coming out of the microhole (120).
2. The high wear-resistant steel roll according to claim 1, characterized in that: The lubricating pin (300) is made of graphite or graphite-based sintered material, its axial length is greater than the depth of the micropore (120), and it has a wear-resistant structure.
3. The high wear-resistant steel roll according to claim 1, characterized in that: The guide gap (310) consists of multiple axial grooves evenly distributed in shape, with a rectangular or semi-circular cross-section, used to guide the positive pressure airflow outward along the outside of the lubrication pin to the outside of the roller sleeve.
4. The high wear-resistant steel roll according to claim 1, characterized in that: The limiting plate (320) includes a flange or a limiting step, the maximum outer diameter of which is greater than the minimum through diameter of the microhole (120), forming a physical limiting and thrust-stopping effect.
5. The high wear-resistant steel roll according to claim 1, characterized in that: The pressure roller body (100) and the roller sleeve (110) adopt an interference fit or a detachable fit structure.
6. The high wear-resistant steel roll according to claim 1, characterized in that: The gas source system connected to the rotary joint (200) can continuously provide a positive gas pressure of 0.05MPa to 0.15MPa and maintain a stable gas input during the rotation of the pressure roller.
7. The high wear-resistant steel roll according to claim 1, characterized in that: The number of lubrication pins (300) is at least 50, which are distributed in a matrix on the surface of the pressure roller body (100) and the roller sleeve (110) with uniform spacing and the arrangement form includes plum blossom shape or linear array.