Rocker arm contact surface grinding method and device based on working condition simulation

Abstract

The invention discloses a rocker arm contact surface grinding method and device based on working condition simulation. The method comprises the following steps: mounting a rocker arm on a clamping mechanism, and enabling the rocker arm to rotate around a working axis; adjusting the position of the grinding wheel to enable the grinding surface to be opposite to the to-be-processed contact surface of the rocker arm; controllable additional force or moment is applied to the rocker arm, so that the contact surface abuts against the grinding surface; a feeding mechanism is controlled to enable the grinding wheel and the rocker arm to generate reciprocating relative linear motion in the motion direction of the valve, and meanwhile the additional force or torque drives the rocker arm to swing around the working axis in a following mode; the movement stroke is not smaller than the working stroke of the valve or the valve bridge; and continuously grinding until a target contour is formed. Grinding machining is conducted by simulating the actual working condition of the rocker arm, the consistency of batch production can be improved while the production efficiency of the rocker arm is guaranteed, universality is high, flexibility is high, and rocker arm remodeling production and adjustment are facilitated.

Description

Technical Field

[0001] This invention relates to the field of engine parts manufacturing technology, specifically to a method and apparatus for grinding rocker arm contact surfaces based on working condition simulation. Background Technology

[0002] During the intake and exhaust processes of an engine, the contact surface (sliding surface) between the rocker arm and the valve bridge or valve stem end needs to withstand high-frequency impacts and sliding friction. Its geometric accuracy and surface quality directly affect the smoothness and sealing of valve movement, as well as the reliability and lifespan of the entire valve train. Currently, the industry mainly uses grinding to process the rocker arm contact surface. The specific processing steps are as follows: First, the outer contour of the grinding wheel is dressed to match the shape of the rocker arm contact surface, often in the form of an arc. Then, during the grinding process, the grinding wheel rotates while the rocker arm reciprocates linearly along its swing axis, directly grinding the required arc surface using the contour formed by the grinding wheel.

[0003] However, this method has the following drawbacks:

[0004] (1) Grinding wheels have poor versatility and high management costs. Different grinding wheel outer diameters need to be designed for different rocker arm contact surfaces; different grinding wheels need to be replaced when machining different rocker arms, resulting in poor flexibility and high spare parts costs.

[0005] (2) Low efficiency and high maintenance cost in batch production. During batch grinding, the profile of the grinding wheel will be deformed due to wear, and the machine must be stopped to repair the shape of the grinding wheel, which seriously affects the production cycle. In addition, the wear of the grinding wheel will cause differences in the processing of the rocker arm, resulting in poor consistency in batch production and requiring frequent maintenance of the grinding wheel.

[0006] In the prior art, relevant solutions have been disclosed. For example, patent CN1035721C discloses a method and apparatus for machining the circular surface of a rocker arm sliding contact surface. It uses a side plane on a grinding wheel perpendicular to the axis of rotation of the grinding wheel for grinding, and makes the rocker arm swing back and forth around a swing axis parallel to the plane of the grinding wheel. Then, fine grinding is performed by adjusting the distance between the swing axis and the plane of the grinding wheel.

[0007] While the above solution avoids a series of problems caused by grinding wheel forming and dressing, the required swing of the rocker arm is not a swing around its own axis, but requires the design of a specific swing path. This necessitates not only the design of positioning components and fixtures to provide a fixed swing axis, but also the design of a transmission mechanism to enable the rocker arm to swing along a specific path. The positioning components, fixtures, and transmission mechanism directly affect the forming of the rocker arm's sliding contact surface; the gaps between these components and the contact fit between the fixture and the components all directly affect the grinding trajectory, leading to poor consistency in mass production. Furthermore, after rough grinding, this solution requires extremely small positional adjustments (e.g., 0.02 mm) to drive the grinding wheel or fixture to achieve fine grinding, which places high demands on the accuracy and stability of the feed mechanism.

[0008] In summary, existing rocker arm contact surface grinding technologies, whether traditional profile grinding methods or improved rocker arm oscillation envelope methods, all suffer from difficulties in ensuring product batch consistency. Therefore, there is an urgent need to propose a new rocker arm contact surface grinding method that can guarantee high production efficiency while improving the consistency of rocker arm batch production. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a new method for grinding the contact surface of rocker arms, which can ensure high production efficiency while improving the consistency of rocker arm mass production.

[0010] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: A method for grinding the contact surface of a rocker arm based on working condition simulation includes the following steps: A rocker arm and a clamping mechanism are provided. The rocker arm is mounted on the clamping mechanism with its working axis as a reference, and the rocker arm can rotate around the working axis. Set up a grinding device and adjust the position of the grinding wheel in the grinding device so that the circumferential surface of the grinding wheel is used as the grinding surface and is set opposite to the contact surface to be processed of the rocker arm. A controllable additional force or torque is applied to the rocker arm so that the contact surface abuts against the grinding surface; The grinding device is started to drive the grinding wheel to rotate; Simulate the relative motion between the rocker arm and the valve or valve bridge under actual working conditions: control the first feed mechanism to generate a reciprocating relative linear motion between the rocker arm and the grinding wheel along the motion direction parallel to the valve or valve bridge; at the same time, the additional force or torque drives the rocker arm to follow and swing around the working axis; the stroke H of the reciprocating relative linear motion is not less than the motion stroke of the valve or valve bridge; The contact surface is continuously ground until the target contour is formed.

[0011] In a preferred embodiment, the steps of simulating the relative movement of the rocker arm with the valve or valve bridge in actual working condition are as follows: controlling the first feed mechanism to drive the grinding wheel to reciprocate linearly along the movement direction parallel to the valve or valve bridge, while the additional force or torque drives the rocker arm to follow the movement of the grinding wheel and generate a following swing.

[0012] In a preferred embodiment, the steps of simulating the relative motion between the rocker arm and the valve or valve bridge in actual working condition are as follows: controlling the first feed mechanism to drive the rocker arm to reciprocate linearly along the direction of motion parallel to the valve or valve bridge, while the additional force or torque controls the rocker arm to reciprocate around the working axis.

[0013] A preferred embodiment further includes the following steps: Adjust the position of the rocker arm and / or the grinding wheel so that the rotation axis of the grinding wheel is perpendicular to the working axis of the rocker arm.

[0014] A preferred embodiment further includes the following steps: Control the rocker arm to the middle position of its swing stroke, and adjust the position of the rocker arm and / or the grinding wheel so that the center plane of the width direction of the grinding surface is coplanar with the center plane of the contour direction of the contact surface.

[0015] A preferred embodiment further includes the following steps: Control the rocker arm and / or the grinding wheel to move relative to each other in an axial direction parallel to the working axis, so as to adjust the axial grinding position.

[0016] The present invention also discloses a rocker arm contact surface grinding apparatus for implementing the above method, comprising: The clamping mechanism is used to clamp the rocker arm, which is rotatable about the working axis. The grinding device includes the grinding wheel and a spindle that drives the grinding wheel to rotate. The first feed mechanism, connected to the clamping mechanism and / or the grinding device, is used to drive the grinding wheel and the rocker arm to generate a reciprocating relative linear motion parallel to the movement direction of the valve or valve bridge. A drive control unit is used to apply a controllable additional force or torque to the rocker arm; The second feed mechanism, connected to the clamping mechanism and / or the grinding device, is used to drive the rocker arm and / or the grinding wheel to move relative to each other in an axial direction parallel to the working axis.

[0017] In a preferred embodiment, the first feed mechanism is a first linear module connected to the grinding device, used to drive the grinding device and drive the grinding wheel to reciprocate linearly along a direction parallel to the movement direction of the valve or valve bridge.

[0018] In a preferred embodiment, the drive control unit is a cylinder, hydraulic cylinder, or torque motor movably connected to the rocker arm.

[0019] In a preferred embodiment, the second feeding mechanism is a second linear module connected to the clamping mechanism, used to drive the clamping mechanism and move the rocker arm in a direction parallel to the working axis.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] (1) The machining reference of the rocker arm coincides with the usage reference height, which can ensure quality and performance. This invention grinds the rocker arm by simulating the relative motion trajectory of the rocker arm with the valve or valve bridge in actual operation, so that the profile of the contact surface formed by the machining matches the kinematic profile of the actual operation, which can ensure that the ground contact surface can be applied to the intake and exhaust conditions of the engine in actual operation.

[0022] (2) Improved consistency and stability in mass production of rocker arms. Compared to maintaining and dressing the outer diameter of the grinding wheel, or designing a specific transmission mechanism to perform high-precision oscillation path enveloping grinding of the rocker arm, this invention transforms the determining factor of the final contour forming into the reciprocating relative linear motion between the grinding wheel and the rocker arm, and the following oscillation of the rocker arm around its working axis. This method can be precisely controlled by high-precision linear modules and torque motors, and the motion control technology is mature, highly accurate, and has good repeatability, which can guarantee and improve the consistency and stability of mass production.

[0023] (3) It can improve production efficiency and reduce maintenance costs. In this invention, the grinding surface of the grinding wheel does not need to be dressed into a complex shape that matches the product contour, which can save the time, special equipment and consumable costs required for dressing the grinding wheel. In addition, it can also extend the service life of the grinding wheel.

[0024] (4) High versatility and flexibility, facilitating rocker arm changeover production and adjustment. Compared to replacing different grinding wheels with different outer cylindrical profiles, or adjusting specific transmission mechanisms and positioning components to process rocker arms of different specifications, this invention can adapt to the processing requirements of different rocker arm contact surface profiles by adjusting the motion parameters of each linear module, such as the stroke H of the reciprocating relative linear motion. Changeover production time is short, and flexibility is high, making it particularly suitable for flexible production of multiple varieties and small batches.

[0025] (5) Reduced device maintenance difficulty. The present invention decomposes the complex contour forming motion into multiple simple motions and uses standardized modules such as high-precision linear modules and torque motors to achieve this, avoiding the problem of maintaining the precision of complex non-standard linkage mechanisms, making device maintenance simpler. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the rocker arm in this embodiment; Figure 2 This is a schematic diagram illustrating the relative motion between the rocker arm and the grinding wheel in this embodiment; Figure 3 This is a schematic diagram showing the interaction between the rocker arm and the grinding wheel when the rocker arm is in the middle of its swing stroke in this embodiment. Figure 4 This is a schematic diagram showing the extreme positions of the rocker arm and grinding wheel during reciprocating motion in this embodiment; Figure 5 This is a schematic diagram of the forward structure of the rocker arm contact surface grinding device in this embodiment; Figure 6 This is a schematic diagram of the side structure of the rocker arm contact surface grinding device in this embodiment; Figure 7 This is a schematic diagram showing the connection between the drive control unit and the rocker arm in this embodiment.

[0027] Figures 1 to 7 middle: 1. Rocker arm; 11. Working axis centerline; 12. Contact surface; 121. Contour direction center surface; 2. Clamping mechanism; 3. Grinding device; 31. Grinding wheel; 311. Grinding surface; 3111. Width direction center surface; 312. Rotation axis centerline; 32. Grinding wheel motor; 4. First feed mechanism; 41. First servo motor; 42. First ball screw; 5. Drive control unit; 6. Second feed mechanism; 61. Second servo motor; 62. Second ball screw; 7. Machine bed. Detailed Implementation

[0028] 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.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] The structure of rocker arm 1 in this embodiment is as follows: Figure 1 As shown, the rocker arm 1 has a swing shaft hole and a contact surface 12. During operation, the rocker arm 1 reciprocates around the working axis 11 of the swing shaft hole and contacts the valve or valve bridge through the contact surface 12. Preferably, in this embodiment, the contact surface 12 is arc-shaped and symmetrical about the center plane 121 in the contour direction, with an arc length of m and a contour radius of R. The distance from the center plane 121 in the contour direction to the working axis 11 is L.

[0032] This embodiment provides a rocker arm contact surface grinding device based on working condition simulation, such as... Figures 5 to 7 As shown, the machine tool includes a clamping mechanism 2, a grinding device 3, a first feed mechanism 4, a drive control unit 5, a second feed mechanism 6, and a machine bed 7. The clamping mechanism 2 is used to clamp the rocker arm 1, allowing the rocker arm 1 to rotate around the working axis 11. The grinding device 3 is equipped with a grinding wheel 31 and a spindle that drives the grinding wheel 31 to rotate. The spindle is connected to a grinding wheel motor 32.

[0033] Preferably, in this embodiment, the first feed mechanism 4 is a first linear module connected to the grinding device 3, including a first servo motor 41, a first ball screw 42, and a first linear guide. The first feed mechanism 4 is mounted on the machine tool bed 7 and is used to drive the grinding device 3 and drive the grinding wheel 31 to reciprocate linearly along a direction parallel to the movement direction of the valve or valve bridge.

[0034] Preferably, in this embodiment, the drive control unit 5 is a torque motor, used to apply a controllable torque to the rocker arm 1.

[0035] Preferably, in this embodiment, the second feed mechanism 6 is a second linear module connected to the clamping mechanism 2. The second linear module includes a second servo motor 61, a second ball screw 62, and a second linear guide. The second feed mechanism 6 is mounted on the machine tool bed 7 and is used to drive the clamping mechanism 2 and move the rocker arm 1 in a direction parallel to the working axis 11.

[0036] Based on the aforementioned rocker arm contact surface grinding device, this embodiment provides a rocker arm contact surface grinding method based on working condition simulation, comprising the following steps:

[0037] S1: Set up a rocker arm 1 and a clamping mechanism 2, install the rocker arm 1 on the clamping mechanism 2 with its working axis 11 as the reference, and enable the rocker arm 1 to rotate around the working axis 11.

[0038] S2: Set up the grinding device 3, adjust the position of the grinding wheel 31 in the grinding device 3 so that the circumferential surface of the grinding wheel 31 serves as the grinding surface 311 and is positioned opposite to the contact surface 12 to be processed of the rocker arm 1. Figures 2 to 4 As shown.

[0039] S3: Adjust the position of the rocker arm 1 and / or the grinding wheel 31 so that the rotation axis 312 of the grinding wheel 31 is perpendicular to the working axis 11 of the rocker arm 1. Figure 3 As shown.

[0040] It should be noted that in this embodiment, the rotation axis 312 and the working axis 11 are perpendicular to each other. This is only a preferred embodiment. Those skilled in the art should understand that the spatial angle formed between the rotation axis 312 and the working axis 11 can be adjusted to other angles besides perpendicular according to actual needs, so as to adjust the grinding direction between the grinding wheel 31 and the rocker arm 1.

[0041] S4: Control the rocker arm 1 to be in the middle position of its swing stroke, and adjust the position of the rocker arm 1 and / or the grinding wheel 31 so that the center plane 3111 in the width direction of the grinding surface 311 is coplanar with the center plane 121 in the contour direction of the contact surface 12, such as... Figure 3 As shown, the distance from the center plane 3111 in the width direction to the working axis centerline 11 is the same as the distance from the center plane 121 in the contour direction to the working axis centerline 11.

[0042] The advantage of this setup is that it maximizes the use of the grinding surface 311 of the grinding wheel 31, thereby improving the grinding effect and efficiency.

[0043] S5: Activate the drive control unit 5 to apply a controllable additional torque to the rocker arm 1, causing the contact surface 12 to abut against the grinding surface 311, such as... Figures 2 to 4 As shown.

[0044] It should be noted that in this embodiment, the drive control unit 5 is a torque motor. The additional torque provided by the drive control unit 5 causes the contact surface 12 to abut against the grinding surface 311. This is only a preferred embodiment. Those skilled in the art should understand that the drive control unit 5 can also be replaced with a cylinder or a hydraulic cylinder and connected to one end of the rocker arm 1. An additional force can be applied to the end of the rocker arm 1 to cause the contact surface 12 to abut against the grinding surface 311.

[0045] S6: Start the grinding wheel motor 32 of the grinding device 3 and drive the grinding wheel 31 to rotate.

[0046] S7: Simulates the relative movement of rocker arm 1 with the valve or valve bridge under actual working conditions, such as Figure 4 As shown. The specific steps are as follows: the first servo motor 41 is started, and the grinding device 3 is driven by the first feed mechanism 4 to drive the grinding wheel 31 to reciprocate linearly along the direction of movement parallel to the valve or valve bridge; at the same time, the drive control unit 5 drives the rocker arm 1 to follow the movement of the grinding wheel 31 and generate a following swing.

[0047] The reciprocating relative linear motion between the grinding wheel 31 and the rocker arm 1 is the reciprocating linear motion of the grinding wheel 31. The stroke H of the reciprocating relative linear motion is not less than the stroke of the valve or valve bridge.

[0048] It should be noted that, as Figure 4 As shown, the reciprocating relative linear motion stroke H and the swing angle θ of the rocker arm 1 are related to the design dimensions of the contact surface 12. Specifically, the smaller the contour radius R of the contact surface 12, the larger the required swing angle θ and the reciprocating relative linear motion stroke H; the longer the contour arc length m of the contact surface 12, the larger the required swing angle θ and the reciprocating relative linear motion stroke H.

[0049] Furthermore, it should be noted that in this embodiment, controlling the first feed mechanism 4 to drive the grinding wheel 31 to reciprocate linearly along the direction of movement parallel to the valve or valve bridge is merely a preferred embodiment. Those skilled in the art should understand that the first feed mechanism 4 can also be connected to the clamping mechanism 2, and the rocker arm 1 can be driven to reciprocate linearly along the direction of movement parallel to the valve or valve bridge to simulate the relative movement of the rocker arm 1 with the valve or valve bridge in actual working condition.

[0050] S8: Start the second servo motor 61, and drive the clamping mechanism 2 through the second feed mechanism 6 to move the rocker arm 1 relative to the working axis 11 in an axial direction to adjust the axial grinding position.

[0051] It should be noted that in this embodiment, controlling the second feed mechanism 6 to drive the rocker arm 1 to move relative to each other in an axial direction parallel to the working axis 11 is only a preferred embodiment. Those skilled in the art should understand that the second feed mechanism 6 can also be connected to the grinding device 3 to drive the grinding wheel 31 to move relative to each other in an axial direction parallel to the working axis 11 in order to adjust the axial grinding position.

[0052] S9: Continue grinding the contact surface 12 until the target profile is formed.

[0053] This embodiment simulates the relative motion trajectory of the rocker arm 1 with the valve or valve bridge during actual operation to perform grinding, so that the contour of the processed contact surface 12 matches the kinematic contour of the actual operation. This ensures that the ground contact surface 12 can be applied to the intake and exhaust conditions of the engine during actual operation, thereby guaranteeing quality and performance.

[0054] Furthermore, this embodiment transforms the factors determining the final contour of the contact surface 12 into the reciprocating relative linear motion between the grinding wheel 31 and the rocker arm 1, and the following oscillation of the rocker arm 1 around its working axis 11. This motion control is achieved through a high-precision, highly repeatable first feed mechanism 4, a second feed mechanism 6, and a drive control unit 5. This method effectively avoids machining errors caused by grinding wheel 31 dressing errors or complex mechanism motion deviations in traditional methods, improving the consistency of batch production. In addition, the grinding surface 311 of the grinding wheel 31 does not need to be dressed into a complex shape to match the product contour, saving the time required for dressing the grinding wheel 31 and extending its service life, thereby improving production efficiency and reducing maintenance costs. It also facilitates changeover production and adjustment of the rocker arm 1, offering strong versatility and greater flexibility.

[0055] 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 grinding the contact surface of a rocker arm based on working condition simulation, characterized in that, Includes the following steps: Set up a rocker arm (1) and a clamping mechanism (2), install the rocker arm (1) on the clamping mechanism (2) with its working axis (11) as a reference, and enable the rocker arm (1) to rotate around the working axis (11); Set up a grinding device (3), adjust the position of the grinding wheel (31) in the grinding device (3) so that the circumferential surface of the grinding wheel (31) is used as the grinding surface (311) and is set opposite to the contact surface (12) to be processed of the rocker arm (1); A controllable additional force or torque is applied to the rocker arm (1) so that the contact surface (12) abuts against the grinding surface (311). Start the grinding device (3) to drive the grinding wheel (31) to rotate; Simulate the relative motion of the rocker arm (1) with the valve or valve bridge in actual working condition: control the first feed mechanism (4) to make the rocker arm (1) and the grinding wheel (31) generate a reciprocating relative linear motion along the direction of motion of the valve or valve bridge. At the same time, the additional force or torque drives the rocker arm (1) to follow and swing around the working axis (11); the stroke H of the reciprocating relative linear motion is not less than the stroke of the valve or valve bridge. The contact surface (12) is continuously ground until the target profile is formed.

2. The method for grinding the contact surface of a rocker arm according to claim 1, characterized in that, The steps for simulating the relative motion between the rocker arm (1) and the valve or valve bridge in actual working condition are as follows: control the first feed mechanism (4) to drive the grinding wheel (31) to reciprocate linearly along the direction of motion parallel to the valve or valve bridge, and at the same time, the additional force or torque drives the rocker arm (1) to follow the movement of the grinding wheel (31) and generate a following swing.

3. The method for grinding the contact surface of a rocker arm according to claim 1, characterized in that, The steps for simulating the relative motion between the rocker arm (1) and the valve or valve bridge in actual working condition are as follows: control the first feed mechanism (4) to drive the rocker arm (1) to reciprocate linearly along the direction of motion parallel to the valve or valve bridge, while the additional force or torque controls the rocker arm (1) to reciprocate around the working axis (11).

4. The method for grinding the contact surface of a rocker arm according to any one of claims 1 to 3, characterized in that, It also includes the following steps: Adjust the position of the rocker arm (1) and / or the grinding wheel (31) so that the rotation axis (312) of the grinding wheel (31) is perpendicular to the working axis (11) of the rocker arm (1).

5. The method for grinding the contact surface of a rocker arm according to any one of claims 1 to 3, characterized in that, It also includes the following steps: Control the rocker arm (1) to the middle position of its swing stroke, and adjust the position of the rocker arm (1) and / or the grinding wheel (31) so that the center plane (3111) of the width direction of the grinding surface (311) is coplanar with the center plane (121) of the contour direction of the contact surface (12).

6. The method for grinding the contact surface of a rocker arm according to any one of claims 1 to 3, characterized in that, It also includes the following steps: Control the rocker arm (1) and / or the grinding wheel (31) to move relative to each other in an axial direction parallel to the working axis (11) to adjust the axial grinding position.

7. A rocker arm contact surface grinding apparatus for implementing the method according to any one of claims 1 to 6, characterized in that, include: The clamping mechanism (2) is used to clamp the rocker arm (1), which is capable of rotating around the working axis (11); The grinding device (3) is provided with the grinding wheel (31) and a spindle that drives the grinding wheel (31) to rotate; The first feed mechanism (4) is connected to the clamping mechanism (2) and / or the grinding device (3) to drive the grinding wheel (31) and the rocker arm (1) to generate a reciprocating relative linear motion parallel to the direction of movement of the valve or valve bridge; A drive control unit (5) is used to apply a controllable additional force or torque to the rocker arm (1); The second feed mechanism (6), connected to the clamping mechanism (2) and / or the grinding device (3), is used to drive the rocker arm (1) and / or the grinding wheel (31) to move relative to each other in an axial direction parallel to the working axis (11).

8. The rocker arm contact surface grinding device according to claim 7, characterized in that, The first feed mechanism (4) is a first linear module connected to the grinding device (3), used to drive the grinding device (3) and drive the grinding wheel (31) to reciprocate linearly along the direction of movement parallel to the valve or valve bridge.

9. The rocker arm contact surface grinding device according to claim 7, characterized in that, The drive control unit (5) is a cylinder, hydraulic cylinder or torque motor that is movably connected to the rocker arm (1).

10. The rocker arm contact surface grinding device according to claim 7, characterized in that, The second feeding mechanism (6) is a second linear module connected to the clamping mechanism (2), used to drive the clamping mechanism (2) and drive the rocker arm (1) to move in a direction parallel to the working axis (11).

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