Method for processing a metal cushion material, knuckle bearing with a metal cushion ring

Abstract

The application relates to the field of joint bearings, and particularly discloses a processing method of a metal buffer material and a joint bearing with a metal buffer ring. The joint bearing comprises an outer ring, an inner ring, a shaft sleeve and a buffer ring, the inner ring is sleeved outside the shaft sleeve, the buffer ring is arranged between the inner ring and the shaft sleeve, the inner ring, the buffer ring and the shaft sleeve synchronously rotate, and the buffer ring is made of the metal material processed by the processing method. The joint bearing has a good buffer shock absorption effect, improves the reliability of a vehicle suspension system and the smoothness of the whole vehicle, and effectively reduces the vibration noise of the vehicle suspension system.

Description

Technical Field

[0001] This invention relates to the field of spherical bearings, and more particularly to a method for processing a metal buffer material and a spherical bearing with a metal buffer ring. Background Technology

[0002] The vehicle suspension system is an important component of a car. It is the collective term for all force-transmitting connection devices between the car frame and the wheels. Its function is to transmit force and torque between the wheels and the frame, and to buffer the impact force transmitted from uneven road surfaces to the frame or body, thereby attenuating the vibration caused by it, so as to ensure smooth driving of the car, support the body, and improve the ride comfort.

[0003] like Figure 1 As shown, a common vehicle suspension system includes a balance torsion bar assembly 01 and a rotary electromechanical actuator 05. The balance torsion bar assembly 01 is located between the vehicle body 06 and the road wheel 01; the rotary electromechanical actuator 05 is located on the vehicle body 06 and connected to the road wheel 02 via a connecting rod assembly 03. A spherical bearing 04 is provided between the connecting rod 03 and the rotary electromechanical actuator 05.

[0004] Commonly available spherical bearings are made of rigid materials. When driving on rough roads, the high-frequency, small-amplitude vibrations transmitted from the load-bearing wheels to the electromechanical actuators of the vehicle's suspension system via connecting rods can generate significant inertial forces on the rotating components of the actuators. These large inertial forces inevitably lead to excessive impact torques, damaging weaker components such as the transmission and connecting shafts, thus affecting the overall performance of the vehicle. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a processing method for metal buffer material and a joint bearing with a metal buffer ring, which has a good buffering and shock absorption effect, improves the reliability of vehicle suspension system and the smoothness of vehicle ride, and effectively reduces the vibration and noise of vehicle suspension system.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a method for processing a metal cushioning material, comprising at least the following steps:

[0007] Step 1: Billet pretreatment: Select block billets and use hot rolling process to make the billets into wire rods, with a hot rolling temperature ≥980℃;

[0008] Step 2: Cold drawing into wire: The wire rod is made into a metal wire with a diameter of 0.15~0.3mm by adopting a multi-pass gradual cold drawing method; the average cross-sectional reduction rate per pass is 5~10% and the drawing speed is 10~15m / s;

[0009] Step 3: Heat treatment: The metal wire is subjected to tempering heat treatment at a temperature ≥950℃;

[0010] Step 4: Pressing and molding: The metal wire is pre-formed using a mesh weaving method and then finally molded under pressure; the density of the material after molding is 1.5~3.0g / cm³.

[0011] The metal cushioning material obtained by the above processing method can balance high strength and high elastic modulus, and can be applied to working conditions that require high load-bearing capacity and good cushioning performance.

[0012] Preferably, in step two, the cold drawing process is divided into a semi-finished product stage and a finished product stage, and the diameter of the semi-finished metal wire is ±1.0 mm.

[0013] Sodium-based lubricating powder is used for lubrication in the semi-finished product stage, and polycrystalline film oil is used for lubrication in the finished product stage.

[0014] Annealing heat treatment is performed between the semi-finished product stage and the finished product stage, with an annealing temperature of 1050~1080℃.

[0015] The semi-finished product stage processing can be designed to prioritize processing efficiency, while the finished product stage processing can be designed to prioritize the performance of the metal material, such as surface quality and internal mechanical properties. Furthermore, after the semi-finished product stage is completed, annealing heat treatment is used to improve the surface and internal defects of the metal wire, thus balancing processing efficiency and finished product performance.

[0016] Preferably, in step four, the metal wire is first spiral wound and then woven into a mesh. After the spiral winding, the diameter of the spiral coil is 10 to 15 times the diameter of the metal wire, and the pitch is 0.9 to 1.1 times the diameter of the spiral coil.

[0017] The combination of spiral winding and mesh weaving results in a more complex internal structure, leading to better strength and toughness. Simultaneously, the material exhibits a greater distribution of cavities in all directions, resulting in improved cushioning performance.

[0018] A spherical plain bearing with a metal buffer ring includes an outer ring and an inner ring, as well as a bushing and a buffer ring. The inner ring is sleeved on the outside of the bushing, and the buffer ring is disposed between the inner ring and the bushing. The inner ring, the buffer ring, and the bushing rotate synchronously. The buffer ring is made of a metal material processed by the method described above.

[0019] By setting a buffer ring, a good buffering and shock absorption effect can be achieved between the inner ring bushing and the inner ring, which improves the reliability of the vehicle suspension system and the smoothness of the vehicle ride, and effectively reduces the vibration and noise of the vehicle suspension system.

[0020] Preferably, the bushing and the buffer ring are interference-fitted. After the bushing is inserted into the buffer ring, the buffer ring has an outward expansion preload, which increases the tightness of the fit between the buffer ring and the inner ring, and enables the synchronous rotation of the bushing, the buffer ring and the inner ring.

[0021] Preferably, a gasket is provided between the outer ring and the inner ring to provide a certain buffering and lubrication effect between the inner and outer rings.

[0022] Preferably, the inner side of the inner ring has a limiting groove, and the outer side of the buffer ring has a limiting protrusion, with the limiting groove cooperating with the limiting protrusion; the buffer ring is arranged in an open loop in the circumferential direction.

[0023] The fit between the limiting groove and the limiting protrusion effectively prevents the buffer ring from moving axially relative to the inner ring. The open-loop design of the buffer ring creates the conditions for it to be inserted into the inner ring.

[0024] Preferably, the buffer ring is formed by at least two independently arranged segments in the circumferential direction, which facilitates the processing and assembly of the buffer ring.

[0025] Preferably, the height of the limiting protrusion is 0.1~0.2mm greater than the depth of the limiting groove, effectively ensuring that the top of the limiting protrusion contacts the bottom surface of the limiting groove.

[0026] Preferably, the width of the limiting groove is 0.5~1mm larger than the width of the outer ring, ensuring that the buffer ring can effectively buffer the bearing surfaces between the inner and outer rings. Attached Figure Description

[0027] Figure 1 This is a structural diagram of a vehicle suspension system;

[0028] Figure 2 This is a schematic diagram of the spherical bearing cylinder structure with a metal buffer ring in this embodiment.

[0029] Figure 3 This is a cross-sectional view of the spherical bearing cylinder structure with a metal buffer ring in this embodiment;

[0030] Figure 4 This is a schematic diagram of the inner ring structure of the spherical bearing with a metal buffer ring in this embodiment;

[0031] Figure 5 This is a cross-sectional view of the inner ring of the spherical bearing with a metal buffer ring in this embodiment;

[0032] Figure 6 This is a schematic diagram of the structure of the buffer ring in the spherical bearing with a metal buffer ring in this embodiment;

[0033] Figure 7This is a cross-sectional view of the buffer ring in the spherical bearing with a metal buffer ring in this embodiment. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Example

[0035] A method for processing a metal cushioning material includes at least the following steps:

[0036] Step 1: Billet pretreatment: Select stainless steel block billets and use hot rolling process to make the billets into wire rods. The hot rolling temperature is ≥980℃.

[0037] After heat treatment, the oxide layer on the surface of the wire rod is rinsed. Specifically, the wire rod is immersed in bearing cleaning fluid for one hour, while being moved up and down simultaneously.

[0038] Step 2: Cold drawing into wire: The wire rod is cold drawn in multiple passes to form metal wires with a diameter of 0.15~0.3mm. The average reduction of area per pass is 5~10%, and the drawing speed is 10~15m / s.

[0039] Specifically, the cold-drawing process is divided into a semi-finished product stage and a finished product stage. The diameter of the semi-finished metal wire is ±1.0 mm. Sodium-based lubricating powder is used for lubrication in the semi-finished product stage, while polycrystalline film oil is used for lubrication in the finished product stage. Between the semi-finished product stage and the finished product stage, an annealing heat treatment is performed at a temperature of 1050~1080℃.

[0040] Step 3: Heat treatment: The metal wire is subjected to tempering heat treatment at a temperature ≥950℃;

[0041] Step 4: Pressing and Forming: The metal wire is first spirally wound. After spiral winding, the diameter of the spiral coil is 10 to 15 times the diameter of the metal wire, and the pitch is 0.9 to 1.1 times the diameter of the spiral coil. Next, the metal wire is pre-formed using a mesh weaving method and finally formed under pressure extrusion. The density of the formed material is 1.5 to 3.0 g / cm³.

[0042] Specifically, during the pressing and molding process, a specific mold can be selected to directly press and mold the material according to the specific working conditions, without the need for subsequent machining steps.

[0043] The metal cushioning material obtained by the above processing method can balance high strength and high elastic modulus, and can be applied to working conditions requiring high load-bearing capacity and good cushioning performance. Specifically, the metal cushioning material obtained by the above processing method has an elastic modulus of not less than 210 GPa, a tensile strength of not less than 560 MPa, and a yield strength of not less than 230 MPa.

[0044] In step two, the semi-finished product stage processing can be designed to prioritize processing efficiency, while the finished product stage processing can be designed to prioritize the properties of the metal material, such as surface quality and internal mechanical properties. Furthermore, after the semi-finished product stage is completed, annealing heat treatment is used to improve the surface and internal defects of the metal wire, thus balancing processing efficiency and finished product performance.

[0045] In step four, the combination of spiral winding and mesh weaving results in a more complex internal structure of the material, leading to better strength and toughness. Simultaneously, the material exhibits a greater distribution of cavities in all directions, resulting in improved cushioning performance.

[0046] like Figure 2 and Figure 3 As shown, a spherical bearing with a metal buffer ring includes an outer ring 1 and an inner ring 2. A gasket is provided between the outer ring 1 and the inner ring 2, which plays a certain role in buffering and lubrication between the inner ring 2 and the outer ring 1.

[0047] like Figure 2 and Figure 3 As shown, it also includes a bushing 4 and a buffer ring 3. The inner ring 2 is fitted onto the outside of the bushing 4, and the buffer ring 3 is disposed between the inner ring 2 and the bushing 4. The inner ring 2, the buffer ring 3, and the bushing 4 rotate synchronously. The buffer ring 3 is made of metal material processed by the method described above.

[0048] By setting the buffer ring 3, a good buffering and shock absorption effect can be achieved between the inner ring 2 bushing 4 and the inner ring 2, which improves the reliability of the vehicle suspension system and the smoothness of the vehicle ride, and effectively reduces the vibration and noise of the vehicle suspension system.

[0049] Specifically, the bushing 4 and the buffer ring 3 are interference-fitted. After the bushing 4 is installed into the buffer ring 3, the buffer ring 3 has an outward expansion preload, and the buffer ring 3 and the inner ring 2 are tightly fitted together, thus realizing the synchronous rotation of the bushing 4, the buffer ring 3 and the inner ring 2.

[0050] Specifically, such as Figures 3-7As shown, a limiting groove 21 is formed on the inner side of the inner ring 2, and a limiting protrusion 31 is provided on the outer side of the buffer ring. The limiting groove 21 and the limiting protrusion 31 cooperate with each other. The buffer ring 3 is circumferentially open. The cooperation between the limiting groove 21 and the limiting protrusion 31 can effectively prevent the buffer ring 3 from moving axially relative to the inner ring 2. The open-loop configuration of the buffer ring 3 creates conditions for the buffer ring 3 to be inserted into the inner ring 2.

[0051] Specifically, such as Figure 6 As shown, the buffer ring 3 is formed by at least two independently arranged segments in the circumferential direction, which facilitates the processing and assembly of the buffer ring 3.

[0052] Specifically, such as Figure 5 and Figure 7 As shown, the height of the limiting protrusion 31 is denoted as H, and the depth of the limiting groove 21 is denoted as C. Then, HC = 0.1~0.2mm, which effectively ensures that the top of the limiting protrusion 31 is in contact with the bottom surface of the limiting groove 21.

[0053] Specifically, such as Figure 3 and Figure 5 As shown, the width of the limiting groove 21 is denoted as B, and the width of the outer ring 1 is denoted as A. Then BA = 0.5~1mm, which ensures that the buffer ring 3 can effectively buffer the bearing surfaces between the inner ring 2 and the outer ring 1.

[0054] In summary, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for processing a metal cushioning material, characterized in that, At least the following steps are included: Step 1: Billet pretreatment: Select block billets and use hot rolling process to make the billets into wire rods, with a hot rolling temperature ≥980℃; Step 2: Cold drawing into wire: The wire rod is made into a metal wire with a diameter of 0.15~0.3mm by adopting a multi-pass gradual cold drawing method; the average cross-sectional reduction rate per pass is 5~10% and the drawing speed is 10~15m / s; Step 3: Heat treatment: The metal wire is subjected to tempering heat treatment at a temperature ≥950℃; Step 4: Pressing and molding: The metal wire is pre-formed using a mesh weaving method and then finally molded under pressure; the density of the material after molding is 1.5~3.0g / cm³.

2. The processing method according to claim 1, characterized in that: In step four, the metal wire is first spiral wound, and then the mesh is woven. After the spiral winding, the diameter of the spiral coil is 10 to 15 times the diameter of the metal wire, and the pitch is 0.9 to 1.1 times the diameter of the spiral coil.

3. A spherical plain bearing with a metal buffer ring, comprising an outer ring and an inner ring, characterized in that: It also includes a bushing and a buffer ring, wherein the inner ring is sleeved on the outside of the bushing, and the buffer ring is disposed between the inner ring and the bushing, and the inner ring, the buffer ring and the bushing rotate synchronously; the buffer ring is made of metal material processed by the processing method described in claim 1 or 2.

4. The spherical plain bearing according to claim 3, characterized in that: The bushing and the buffer ring are interference-fitted.

5. The spherical plain bearing according to claim 3, characterized in that: A liner is provided between the outer ring and the inner ring.

6. The spherical plain bearing according to any one of claims 3-5, characterized in that: The inner side of the inner ring is provided with a limiting groove, and the outer side of the buffer ring is provided with a limiting protrusion. The limiting groove and the limiting protrusion cooperate with each other. The buffer ring is arranged in an open loop in the circumferential direction.

7. The spherical plain bearing according to claim 6, characterized in that: The buffer ring is formed by at least two independently arranged segments in the circumferential direction.

8. The spherical plain bearing according to claim 6, characterized in that: The height of the limiting protrusion is 0.1~0.2mm greater than the depth of the limiting groove.

9. The spherical plain bearing according to claim 6, characterized in that: The width of the limiting groove is 0.5~1mm larger than the width of the outer ring.

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