Sliding bearing and machining method thereof

Abstract

The invention belongs to the technical field of bearing machining, and particularly relates to a sliding bearing and a machining method thereof.The sliding bearing comprises a mounting part and a working part, the working part is arranged at the top of the mounting part, the bottom of the mounting part is used for being externally connected with a tool, the working part comprises a through hole, the through hole is formed in the top of the working part, and the through hole is formed in the top of the working part; the through hole is used for externally connecting a rotating shaft; the working surface is bent, and the working surface is arranged on the surface of the top of the working part; the sliding bearing aims at improving the bearing capacity and the rotating precision of the sliding bearing through the arrangement of the working face. Through the arrangement, an effective oil film can be formed in the operation process of the bearing, so that friction and abrasion are reduced, and the service life of the bearing is prolonged. Meanwhile, by controlling the bending angle and thickness of the working face, the stability of the bearing during high-speed rotation can be ensured, vibration and noise are reduced, and the overall operation efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of bearing processing, and in particular relates to a sliding bearing and a processing method thereof. Background Art

[0002] Sliding bearings are essential components widely used in various mechanical devices. Their primary function is to support rotating or reciprocating shafts, reducing friction between the shaft and the bearing housing, thereby improving mechanical efficiency and extending service life. Sliding bearings typically consist of a bushing and a journal. The bushing is typically made of metal or a metal alloy and may be coated with a friction-reducing material such as babbitt, bronze, or polymer. When designing and manufacturing sliding bearings, factors such as the operating environment, load, rotational speed, and lubrication conditions must be considered to ensure that the bearing's performance meets the requirements of the specific application.

[0003] In existing technology, sliding bearings are in direct contact with and slide against the shaft journal. To reduce friction between the bearing and the shaft journal, lubricant is added between the working portion of the bearing and the shaft journal. During the rotation of the sliding bearing, this lubricant forms a thin, load-bearing liquid film between the shaft journal and the bearing. However, the surfaces of existing sliding bearings are mostly smooth, making it difficult for lubricant to remain on these surfaces after rotation. This problem leads to unstable lubrication, resulting in increased wear and elevated temperatures during operation due to insufficient lubrication. Summary of the Invention

[0004] In view of this, the present invention provides a sliding bearing and a processing method thereof, the purpose of which is to increase the contact area between the lubricating oil and the sliding bearing to promote the formation of the oil film.

[0005] The technical solution adopted in the present invention is as follows:

[0006] A sliding bearing and a processing method thereof, comprising a mounting portion and a working portion, wherein the working portion is arranged at the top of the mounting portion, and the bottom of the mounting portion is used for external tooling, and the working portion comprises: a through-hole, wherein the through-hole is opened at the top of the working portion and is used for externally connecting a rotating shaft; a working surface, wherein the working surface is curved and is arranged on the top surface of the working portion; wherein the working surface is arranged along the edge of the through-hole and is curved along the rotation direction of the rotating shaft; the working surface has a thickness, and the thickness of the working surface increases along its curved direction.

[0007] As a preferred technical solution, the thickness of the working surface is between 0 mm and 0.045 mm.

[0008] Furthermore, a cavity is provided inside the mounting portion, and the through-hole is communicated with the cavity, wherein a thread is provided on an inner wall of the cavity on a side away from the through-hole.

[0009] Furthermore, it also includes a connecting part, which includes a slot and a connecting hole. The slot is opened at the top of the working part, and one end of the slot is connected to the edge of the perforation. The connecting hole is arranged in the slot, and the connecting hole extends toward the direction of the mounting part and passes through the mounting part.

[0010] Furthermore, there are four slots, which are arranged in a cross shape on the top of the working part, wherein each of the four slots is provided with a connecting hole, and the connecting hole is used for externally connecting a connecting rod.

[0011] Furthermore, the working surface is in a fan-shaped structure, and there are four working surfaces, wherein any two adjacent thread surfaces are separated by a groove.

[0012] A method for processing a sliding bearing, comprising the following steps:

[0013] S100, using a tool with a threaded part, which must be compatible with the thread in the cavity of the mounting portion;

[0014] S200, threading the cavity with threads on the mounting portion to the threaded member on the tooling, and placing a tool of the cutting device on top of the working portion;

[0015] S300, starting the cutting device and rotating the mounting portion simultaneously, causing the mounting portion to perform a lifting and reciprocating motion on the threaded member, thereby driving the working portion to move toward or away from the tool;

[0016] S400, by rotating the mounting part forward and backward, the contact angle between the tool and the top of the working part is adjusted to complete the processing of the bending angle and thickness of the working surface.

[0017] Furthermore, in step S400, when processing the working surface of each fan-shaped structure, the number of rotations and the lifting distance of the mounting portion are controlled to ensure the consistency of the bending angle and thickness of each working surface and the tolerance range that meets the design requirements.

[0018] Furthermore, during the processes S300 and S400, the tool wear of the cutting equipment needs to be monitored in real time. When the tool wear reaches a certain level, the tool needs to be replaced in time to ensure that the machining accuracy and surface quality of the working surface are not affected.

[0019] Furthermore, in S200, before placing the tool of the cutting equipment on the top of the working part, the position and angle of the tool must be accurately calibrated to ensure that the initial position relationship between the tool and the top of the working part is accurate, thereby ensuring the accuracy of subsequent processing of the working surface and other structures.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0021] 1. The design of the working surface helps improve the bearing's load-bearing capacity and rotational accuracy. This configuration allows the bearing to form an effective oil film during operation, thereby reducing friction and wear and extending the bearing's service life. Furthermore, by controlling the curvature angle and thickness of the working surface, the bearing's stability at high speeds can be ensured, vibration and noise can be reduced, and overall operating efficiency can be improved.

[0022] 2. Adjusting the contact angle and distance between the working part and the tool by rotating the mounting part forward and backward helps to ensure that the bending angle and thickness of each working surface can be uniformly controlled, so as to improve the overall production efficiency of the sliding bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0024] Figure 1 It is a structural schematic diagram of the sliding bearing provided by the present invention;

[0025] Figure 2 It is a top view of the working part provided by the present invention.

[0026] Component markings in the figure: mounting part -1; working part -2; through hole -3; working surface -4; connecting part -5; connecting hole -6. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0028] In existing technology, sliding bearings directly contact and slide against the shaft journal. To reduce friction between the bearing and the shaft journal, lubricating oil must be injected between the bearing's working surface and the shaft journal. As the sliding bearing rotates, this lubricating oil forms a load-bearing thin film between the shaft journal and the bearing. However, the surfaces of most sliding bearings are smooth, making it difficult for the lubricant to remain on the surface. This problem leads to unstable lubrication, which in turn often causes the sliding bearing to experience increased wear and elevated temperatures during operation due to insufficient lubrication.

[0029] Example 1

[0030] Therefore, in order to solve the above problems and realize the function of improving the oil film forming rate on the surface of the sliding bearing, the present invention discloses a sliding bearing, Figure 1-Figure 2 , including a mounting portion 1 and a working portion 2, the working portion 2 is arranged at the top of the mounting portion 1, and the bottom of the mounting portion 1 is used for external tooling. Specifically, it also includes a through-hole 3, the through-hole 3 is opened at the top of the working portion 2, and the through-hole 3 is used for external rotation shaft; a working surface 4, the working surface 4 is curved, and the working surface 4 is arranged on the top surface of the working portion 2; wherein, the working surface 4 is arranged along the edge of the through-hole 3, and the working surface 4 is curved along the rotation direction of the rotation shaft; the working surface 4 has a thickness, and the thickness of the working surface 4 increases along its bending direction.

[0031] In this embodiment, the contact area between the lubricating oil and the working part 2 can be expanded by setting the working surface 4. When the sliding bearing rotates, the lubricating oil can rotate on the surface of the working part 2 along with the working surface 4, thereby promoting the formation of the oil film.

[0032] In a specific embodiment, when lubricating oil is injected between the bearing and the journal, it flows along the curved shape of the working surface 4. Because the working surface 4 curves along the axis of rotation, as the journal rotates, the lubricating oil, guided by centrifugal force and the working surface 4, diffuses from the edge of the perforation 3 to the surrounding area, forming a wider oil film coverage. Furthermore, the increasing thickness of the working surface 4 allows the entire surface of the working portion 2 to form a spiral shape, which makes it easier for the lubricating oil to be retained and gradually transported to the edge as the journal rotates, further enhancing the stability and load-bearing capacity of the oil film.

[0033] Furthermore, the working surfaces 4 are fan-shaped, with four working surfaces 4 provided. Any two adjacent threaded surfaces 4 are separated by a slot. This arrangement allows the lubricating oil to be more evenly distributed across each working surface 4, improving the uniformity and stability of the oil film. Furthermore, the design of four fan-shaped working surfaces 4 enables the bearing to better adapt to varying load and speed conditions during operation, further enhancing its load-bearing capacity and service life. Furthermore, the arrangement of any two adjacent working surfaces 4 separated by slots also helps reduce friction and wear between the working surfaces 4, further extending the bearing's service life.

[0034] As a preferred technical solution, the thickness of the working surface 4 ranges from 0 mm to 0.045 mm. Specifically, the thickness of the working surface 4 increases incrementally from 0 mm to 0.045 mm, thereby forming a spiral structure on the surface of the working portion 2. This arrangement facilitates even distribution of the lubricant and ensures that a stable oil film is effectively formed when the bearing rotates at high speeds. Furthermore, the increasing thickness of the working surface 4 can adapt to lubrication requirements at different speeds, ensuring that the bearing is well lubricated and protected under various operating conditions. By precisely controlling the thickness of the working surface 4, the friction characteristics of the bearing can be optimized, wear can be reduced, and the bearing service life can be extended.

[0035] Example 2

[0036] On the basis of embodiment 1, in order to improve the stability of the sliding bearing in the tooling, a cavity is provided inside the mounting portion 1, and the through hole 3 is connected to the cavity, wherein a thread is provided on the inner wall of the cavity away from the through hole 3.

[0037] In this embodiment, the threaded structure of the cavity of mounting portion 1 closely mates with the external fixture. For example, in machining equipment, when a sliding bearing needs to be installed, a fixture with a matching threaded member is screwed into the threaded cavity of mounting portion 1. This threaded connection not only ensures the sliding bearing's secure installation in the equipment, preventing displacement during operation, but also provides stable support for subsequent machining operations. When machining working surface 4, the threaded connection between mounting portion 1 and the fixture ensures the stability of the entire bearing during rotation and lifting, enabling the cutting equipment to precisely machine working portion 2.

[0038] Example 3

[0039] On the basis of Example 2, in order to improve the stability between the mounting part 1 and the working part 2, the present invention also includes a connecting part 5, which includes a slot and a connecting hole 6. The slot is opened at the top of the working part 2, and one end of the slot is connected to the edge of the through hole 3. The connecting hole 6 is arranged in the slot, and the connecting hole 6 extends toward the mounting part 1 and passes through the mounting part 1.

[0040] In this embodiment, when the sliding bearing needs to be mounted on an external machine, additional fixing and positioning are required. By providing a connecting hole 6 within the slot and passing a connecting rod through the connecting hole 6, the sliding bearing can be connected to other components. The slotted design allows the connection position to be adjusted according to actual needs, facilitating integration with components of varying structures. During installation, after inserting the connecting rod into the connecting hole 6, the sliding bearing can be precisely adjusted in angle to ensure its concentricity with the rotating shaft and its relative position to other components. This structure effectively improves the assembly flexibility and positioning accuracy of the sliding bearing in complex equipment, enhancing the stability of the entire mechanical system.

[0041] Example 4

[0042] In contrast to Example 3, four slots are provided, arranged in a cross pattern on the top of the working portion 2. Each slot has a connecting hole 6 for connecting an external connecting rod. In the transmission of heavy machinery, the four cross-shaped slots and connecting holes 6 provide multiple connection points. This symmetrical distribution ensures uniform connection force in all directions, further enhancing the bearing's stability under high-load conditions.

[0043] For example, connecting rods within four slots evenly distributes loads across the connection points, preventing bearing damage caused by localized excessive stress. Furthermore, the cross-slot structure facilitates angle adjustment during installation, allowing operators to select the appropriate slot for connection based on actual installation requirements, improving assembly efficiency.

[0044] In summary, in combination with the first to fourth embodiments, the working principle of the sliding bearing is as follows:

[0045] First, during the installation of the sliding bearing, the external tooling interface at the bottom of the mounting portion 1 is used to securely mount the bearing in the mechanical equipment. When the mechanical equipment starts, the rotating shaft passes through the perforation 3, contacts the working portion 2, and begins to rotate, and lubricating oil is injected between the bearing and the journal. At this point, the lubricating oil is guided by the curved shape of the working surface 4, flowing along the spiral structure of the working surface 4 and spreading in all directions under the action of centrifugal force, forming a uniform oil film. During this process, the incremental thickness design of the working surface 4 not only facilitates the even distribution of the lubricating oil, but also provides stable lubrication at different speeds, ensuring that the bearing is well lubricated and protected under various operating conditions.

[0046] As the shaft continues to rotate, the oil film forms a load-bearing thin film between the bearing and the journal, effectively reducing the direct contact area between the bearing and the journal, thereby reducing friction and wear. Furthermore, the special design of working surface 4 allows the bearing to better adapt to varying load and speed conditions during operation, further improving its load capacity and service life.

[0047] Example 5

[0048] A method for processing a sliding bearing, applicable to the sliding bearing described in any one of Examples 1-4, the method comprising the following steps: S100, using a tool with a threaded part, which needs to be compatible with the thread in the cavity of the mounting part 1; S200, threading the cavity with the thread of the mounting part 1 to the threaded part on the tool, and placing the tool of the cutting equipment on the top of the working part 2; S300, starting the cutting equipment and rotating the mounting part 1 at the same time, so that the mounting part 1 performs a lifting and reciprocating motion on the threaded part, driving the working part 2 to move toward or away from the tool; S400, adjusting the contact angle between the tool and the top of the working part 2 by rotating the mounting part 1 forward and backward to complete the processing of the bending angle and thickness of the working surface 4.

[0049] In step S100 , the distance between the working part 2 and the cutting device is adjusted by the cooperation between the threaded member on the tooling and the cavity thread of the mounting part 1 .

[0050] In step S200, after the mounting portion 1 is threadedly connected to the tooling, the relative position of the tool and working portion 2 is measured and adjusted using a high-precision measuring instrument to ensure the initial position is accurate. For example, a laser interferometer can be used to measure and adjust the tool position to an accuracy of within ±0.002mm.

[0051] In step S300, after starting the cutting machine, the user manually rotates the mounting portion 1 to cause it to move up and down and reciprocate on the threaded member. This manual operation helps increase flexibility during the machining process, allowing for fine-tuning of the cutting depth and speed based on actual needs, thereby achieving a more precise shape and size of the working surface 4.

[0052] In step S400, specifically, when the mounting part 1 is rotated forward, the tool will gradually approach the top of the working part 2 and cut the working surface 4; and when the mounting part 1 is rotated backward, the tool will gradually move away from the top of the working part 2. Therefore, by adjusting the height of the mounting part 1, the cutting depth of the tool on the working part 2 can be adjusted. For example, when the working part 2 is close to the tool, the tool can cut the working surface 4 at a deeper level, and when the working part 2 is away from the tool, the tool can cut the working surface 4 at a shallower level, thereby achieving the purpose of adjusting the thickness of the working surface 4.

[0053] Subsequently, in conjunction with the rotating mounting portion 1, it can be understood that the mounting portion 1 is raised or lowered during the rotation process. Therefore, during the lifting and lowering process, the rotation angle of the mounting portion 1 will also affect the bending angle of the working surface 4. Specifically, by controlling the rotation angle and lifting distance of the mounting portion 1, the bending angle and thickness of the working surface 4 can be adjusted simultaneously, thereby further improving the overall performance of the sliding bearing.

[0054] In addition, during the processes S300 and S400 , the tool wear of the cutting equipment needs to be monitored in real time. When the tool wear reaches a certain level, the tool is replaced in time to ensure that the machining accuracy and surface quality of the working surface 4 are not affected.

[0055] In said S200, before placing the tool of the cutting equipment on the top of the working part 2, the position and angle of the tool must be calibrated to ensure that the initial position relationship between the tool and the top of the working part 2 is accurate, thereby ensuring the accuracy of subsequent processing of the working surface 4 and other structures.

[0056] In summary, this sliding bearing machining method ensures precise control of the bending angle and thickness of the working surface 4 during actual machining. This machining method not only improves the production precision of the sliding bearing but also enhances the stability and durability of the bearing during use. Furthermore, by manually rotating the mounting portion 1, the operator can intuitively sense changes during the cutting process, allowing them to flexibly adjust cutting parameters based on actual conditions and further optimize the machining results.

[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0058] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sliding bearing and a processing method thereof, comprising a mounting portion (1) and a working portion (2), wherein the working portion (2) is arranged on the top of the mounting portion (1), and the bottom of the mounting portion (1) is used for external tooling, characterized in that: Also includes: A perforation (3), the perforation (3) being provided at the top of the working portion (2), the perforation (3) being used for externally connecting a rotating shaft; A working surface (4), the working surface (4) is curved, and the working surface (4) is provided on the top surface of the working portion (2); Wherein, the working surface (4) is arranged along the edge of the through hole (3), and the working surface (4) is curved along the rotation direction of the rotating shaft; The working surface (4) has a thickness, and the thickness of the working surface (4) increases along its bending direction.

2. The sliding bearing according to claim 1, characterized in that The thickness of the working surface (4) is between 0 mm and 0.045 mm.

3. The sliding bearing according to claim 1, characterized in that A cavity is provided inside the mounting portion (1), and the through hole (3) is connected to the cavity, wherein a thread is provided on the inner wall of the cavity on a side away from the through hole (3).

4. The sliding bearing according to claim 1, characterized in that The invention also includes a connecting portion (5), wherein the connecting portion (5) includes a slot and a connecting hole (6), wherein the slot is provided at the top of the working portion (2), and one end of the slot is connected to the edge of the through hole (3), and the connecting hole (6) is provided in the slot, and the connecting hole (6) extends toward the mounting portion (1) and passes through the mounting portion (1).

5. The sliding bearing according to claim 4, characterized in that There are four slots, which are arranged in a cross shape on the top of the working part (2), wherein each of the four slots is provided with a connecting hole (6), and the connecting hole (6) is used to connect an external connecting rod, and the connecting rod connects the mounting part (1) and the working part (2).

6. The sliding bearing according to claim 1, characterized in that The working surface (4) is in a fan-shaped structure, and there are four working surfaces (4), wherein any two adjacent thread surfaces (4) are separated by a groove.

7. A method for processing a sliding bearing, applicable to the sliding bearing according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: S100, using a tool with a threaded part, the threaded part must be compatible with the thread in the cavity of the mounting portion (1); S200, threading the cavity with threads on the mounting portion (1) to the threaded member on the tooling, and placing a tool of the cutting device on top of the working portion (2); S300, starting the cutting device and rotating the mounting portion (1) so that the mounting portion (1) performs a lifting and reciprocating motion on the threaded member, thereby driving the working portion (2) to move toward or away from the tool; S400, by rotating the mounting portion (1) forward and backward, the contact angle between the tool and the top of the working portion (2) is adjusted to complete the processing of the bending angle and thickness of the working surface (4).

8. The method for processing a sliding bearing according to claim 7, wherein: In the step S100, in the step S400, when processing the working surface (4) of each fan-shaped structure, the bending angle and thickness of each working surface (4) are adjusted by controlling the number of rotations and the lifting distance of the mounting portion (1).

9. The method for processing a sliding bearing according to claim 7, wherein: During the processes of S300 and S400, the tool wear of the cutting equipment needs to be monitored in real time. When the tool wear reaches a certain level, the tool is replaced in time to ensure that the machining accuracy and surface quality of the working surface (4) are not affected.

10. The method for processing a sliding bearing according to claim 7, wherein: In said S200, before placing the tool of the cutting device on the top of the working part (2), the position and angle of the tool are calibrated to ensure that the initial position relationship between the tool and the top of the working part (2) is accurate, thereby ensuring the accuracy of subsequent processing of the working surface (4) and other structures.

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