An engine cylinder liner inner wall honing processing equipment and honing method

Abstract

The present application relates to the technical fields of cylinder liner honing, in particular to an engine cylinder liner inner wall honing processing equipment and honing method, comprising a fixed frame and a lifting assembly, the lifting assembly is installed on the upper end inside the fixed frame; a positioning clamp is installed on the lower end inside the fixed frame, the positioning clamp is used for clamping and fixing the engine cylinder liner; a honing processing head is installed on the lower end of the lifting assembly, the lifting assembly is used for driving the honing processing head to rotate at high speed and move up and down, so as to hone the inner wall of the engine cylinder liner; the honing unit, the feeding unit and the driving unit are used in cooperation, when the honing of the inner wall of the cylinder liner inner hole is needed, the driving unit drives the feeding unit to rotate, the feeding unit drives multiple honing units to move outward synchronously, through the high-speed rotation of the honing frame, the honing units on the outer side of the honing frame can layer by layer hone the inner wall of the cylinder liner inner hole.

Description

Technical Field

[0001] This application relates to the field of cylinder liner honing technology, and in particular to a honing equipment and honing method for the inner wall of engine cylinder liners. Background Technology

[0002] Engine cylinder liners are important components in internal combustion engines, located within the engine block, and serve to house the piston and form the inner wall of the cylinder. Cylinder liners are typically made of robust metal materials such as cast iron, aluminum alloys, or steel to withstand the high temperatures and pressures of piston movement. Their main functions include providing a seal to ensure no leakage during combustion within the cylinder and reducing friction to facilitate piston movement.

[0003] Chinese patent CN118559597A, entitled "Honing Equipment, Online Diameter-Measuring Honing Head, and Honing Method," specifically describes a process where, after the measuring nozzle reaches the target feed amount, the grinding wheel is controlled to continue feeding and the air pressure is re-acquired in real time. When the re-acquired air pressure equals the predetermined air pressure, the grinding wheel stops feeding. Through this setup, when the measuring nozzle reaches the target feed amount, it indicates that the hole is very close to the processing requirements. When the re-acquired air pressure equals the predetermined air pressure, it indicates that the hole has met the processing requirements, processing is complete, and the grinding wheel stops feeding.

[0004] The existing technologies described above can also perform honing on the inner wall of engine cylinder liners. However, when processing the inner wall of cylinder liners, these technologies only adjust the extension of the grinding strips by changing the pressure, and cannot drive the grinding strips to feed synchronously. This results in uneven wear on each grinding strip, and the technology cannot provide timely warnings when the grinding strips are worn out, affecting the honing effect of the inner wall of the cylinder liner. Therefore, there is room for improvement in the existing honing equipment for the inner wall of engine cylinder liners. Summary of the Invention

[0005] In order to accurately perform honing on the inner wall of engine cylinder liners, this application provides a honing device for the inner wall of engine cylinder liners.

[0006] The honing equipment for the inner wall of engine cylinder liners provided in this application adopts the following technical solution:

[0007] A honing machine for the inner wall of an engine cylinder liner includes a fixed frame with a U-shaped structure; a lifting assembly installed at the upper end inside the fixed frame; a positioning fixture installed at the lower end inside the fixed frame for clamping and fixing the engine cylinder liner; and a honing head installed at the lower end of the lifting assembly, the lifting assembly driving the honing head to rotate at high speed and move up and down to hone the inner wall of the engine cylinder liner.

[0008] The honing head includes a honing frame, a mounting plate, a honing unit, a connecting column, a feed unit, and a drive unit. The honing frame has a cylindrical structure, with inner grooves at both the upper and lower ends. A mounting plate is installed on the inner grooves by screws. Protrusions are evenly installed on the outer side of the mounting plate, and a sliding groove is provided in the middle of the protrusions. The honing unit is installed between the two symmetrically arranged protrusions. A connecting column is installed at the upper end of the honing frame, and a hollow groove is provided in the middle of the lower end of the honing frame. Annular grooves are evenly opened from top to bottom inside the honing frame. A feed unit is installed in the annular groove, and the outer end of the feed unit passes through the honing frame and connects to the inner side of the honing unit. A drive unit is installed inside the hollow groove, and the drive unit cooperates with the feed unit. The lower end of the drive unit is sealed to the hollow groove.

[0009] Furthermore, the honing unit includes a sliding frame, a movable plate, a honing strip, a limiting block, a connecting spring, and a fixing column. The sliding frame is slidably arranged in the groove. The sliding frame has a rectangular structure. An opening groove is provided in the middle of the outer side of the sliding frame. The movable plate is slidably arranged inside the opening groove. The honing strip is installed on the outer side of the movable plate by screws. Limiting blocks are symmetrically installed on the inner side of the sliding frame. The limiting blocks are slidably arranged on the outer surface of the mounting plate. Fixing columns are evenly installed at the upper end of the mounting plate. A connecting spring is installed between the fixing column and the limiting block.

[0010] Furthermore, the feeding unit includes an annular frame, blocks, sliders, guide rods, a pneumatic mechanism, and a feeding mechanism. The annular frame is fixedly installed in the annular groove. The annular frame has an L-shaped cross-section. Blocks are evenly installed on the annular frame, and rectangular grooves are set between adjacent blocks. A slider is slidably arranged in the rectangular grooves. Through holes are evenly arranged on the honing frame, and each through hole corresponds to a rectangular groove. A guide rod is slidably arranged in the through holes. The inner side of the guide rod is connected to the slider, and the outer side of the guide rod is connected to the sliding frame. The guide rod has a hollow structure inside, and a pneumatic mechanism is installed inside the guide rod. The outer end of the pneumatic mechanism passes through the sliding frame and is connected to the moving plate. A feeding mechanism is installed in the annular groove. The feeding mechanism cooperates with the slider, and the middle part of the feeding mechanism is connected to the drive unit.

[0011] Furthermore, the pneumatic mechanism includes a piston and a push rod. The piston is slidably disposed within the through hole, and a push rod is mounted on the outside of the piston. The push rod is connected to the movable plate.

[0012] Furthermore, a touch alarm switch is installed on the outer side of the piston component.

[0013] Furthermore, the feeding mechanism includes an annular plate and a connecting frame. The annular plate is slidably disposed in the annular groove. A planar thread is provided on the inner side of the annular plate. A threaded protrusion that mates with the planar thread is provided at the lower end of the slider. A connecting frame is installed on the inner side of the annular plate and mates with the drive unit.

[0014] Furthermore, the drive unit includes a drive motor and a rotating shaft. The drive motor is installed at the lower end of the hollow groove, and the lower end of the drive motor is sealed to the hollow groove through a sealing plate. The rotating shaft is installed on the output shaft of the drive motor, and the rotating shaft is inserted into the middle of the connecting frame.

[0015] Furthermore, the lifting assembly includes a lifting frame, a rotating motor, and a connecting rod. The lifting frame is slidably arranged inside the fixed frame. The rotating motor is installed at the upper end of the lifting frame, and the connecting rod is installed at the lower end of the lifting frame. The upper end of the connecting rod is connected to the output shaft of the rotating motor, and the lower end of the connecting rod is installed with a honing head.

[0016] Furthermore, the positioning fixture includes a positioning frame and a clamping frame. The positioning frame has a rectangular structure and can move horizontally. The positioning frame has a positioning hole in the middle that mates with the lower end of the cylinder liner. The upper end of the positioning frame is evenly provided with clamping frames for pressing the outer wall of the cylinder liner.

[0017] Furthermore, the present invention also provides a honing method for an engine cylinder liner inner wall honing processing equipment, which specifically includes the following steps:

[0018] S1. Cylinder liner inner bore machining: The cylinder liner inner bore is machined by turning, and the inner wall of the machined inner bore has a spiral corrugated structure.

[0019] S2, Cylinder liner clamping and positioning: The machined cylinder liner is placed inside the positioning fixture, and the positioning fixture clamps and fixes the lower end of the cylinder liner to prevent the cylinder liner from shaking.

[0020] S3. Honing head moves up and down: The lifting component can drive the honing head to move up and down, so that the honing head can accurately process the inner wall of the cylinder liner.

[0021] S4. Honing of the cylinder liner inner wall: When the honing head hones the cylinder liner, the drive unit drives multiple honing units to move outward synchronously through the feed unit, so that the honing units can hone the inner wall of the cylinder liner inner hole. After honing, the surface quality of the inner hole is Rk1~3μm, Ra0.4~1.6μm, Rvk≥2.0μm, Rpk≤1.5μm.

[0022] In the above technical solution, the present invention provides an engine cylinder liner inner wall honing equipment. The honing unit, feed unit, and drive unit provided by the present invention work together so that when honing is required on the inner wall of the cylinder liner inner bore, the drive unit drives the feed unit to rotate, and the feed unit drives multiple honing units to move outward synchronously. Through the high-speed rotation of the honing frame, the honing units on the outer side of the honing frame can hone the inner wall of the cylinder liner inner bore layer by layer. The honing strips are replaceable, and by changing the honing strips with different mesh sizes, the honing process can be optimized. In different grades of grinding processes, the pneumatic mechanism is connected to the honing strips via a moving plate. The pneumatic mechanism can control the extension length of the honing strips located inside the sliding frame. That is, when honing the inner wall of the cylinder liner, both the pneumatic mechanism and the feed mechanism can drive the honing strips to move outward. This prevents the contact degree between the honing strips and the inner wall of the cylinder liner from being different due to different wear levels. Through the cooperation of the pneumatic mechanism and the feed mechanism, the purpose of precise honing of the inner wall of the cylinder liner can be achieved. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a cross-sectional structural diagram of this application.

[0025] Figure 2 This is a three-dimensional structural diagram of the honing head of this application.

[0026] Figure 3 This is a cross-sectional structural diagram of the honing head of this application.

[0027] Figure 4 This application Figure 3 A magnified structural diagram at point X in the middle.

[0028] Figure 5 This is a schematic diagram of the first cross-sectional structure of the honing head of this application.

[0029] Figure 6 This is a schematic diagram of the second cross-sectional structure of the honing head of this application.

[0030] Figure 7 This is a cross-sectional structural diagram of the feed unit of this application.

[0031] Figure 8 This is a cross-sectional structural diagram of the slider, guide rod and pneumatic mechanism of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Fixed frame; 2. Lifting assembly; 21. Lifting frame; 22. Rotary motor; 23. Connecting rod; 3. Positioning fixture; 31. Positioning frame; 32. Clamping frame; 4. Honing head; 41. Honing frame; 42. Mounting plate; 43. Honing unit; 431. Sliding frame; 432. Moving plate; 433. Honing strip; 434. Limiting block; 435. Connecting spring; 436. Fixed column; 44. Connecting column; 45. Feeding unit; 451. Ring frame; 452. Stop block; 453. Slider; 454. Guide rod; 455. Pneumatic mechanism; 4551. Piston; 4552. Push rod; 456. Feeding mechanism; 4561. Ring plate; 4562. Connecting frame; 46. Drive unit; 461. Drive motor; 462. Rotating shaft. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] Please see Figure 1-8 The present invention provides an engine cylinder liner inner wall honing equipment, including a fixed frame 1, which has a U-shaped structure; a lifting assembly 2, which is installed inside the upper end of the fixed frame 1; a positioning clamp 3, which is installed inside the lower end of the fixed frame 1, and the positioning clamp 3 is used to clamp and fix the engine cylinder liner; and a honing head 4, which is installed at the lower end of the lifting assembly 2, and the lifting assembly 2 is used to drive the honing head 4 to rotate at high speed and move up and down to perform honing on the inner wall of the engine cylinder liner.

[0035] See Figures 2-5 As shown, the honing head 4 includes a honing frame 41, a mounting plate 42, a honing unit 43, a connecting column 44, a feed unit 45, and a drive unit 46. The honing frame 41 has a cylindrical structure, with inner grooves at both the upper and lower ends. The mounting plate 42 is mounted on the inner grooves by screws. Protrusions are evenly mounted on the outer side of the mounting plate 42, and a sliding groove is provided in the middle of the protrusions. A honing unit is installed between the two symmetrically arranged protrusions. The honing frame 41 has a connecting column 44 installed at its upper end and a hollow groove in the middle of its lower end. The honing frame 41 has an annular groove evenly distributed from top to bottom inside. A feed unit 45 is installed in the annular groove. The outer end of the feed unit 45 passes through the honing frame 41 and connects to the inner side of the honing unit 43. A drive unit 46 is installed inside the hollow groove. The drive unit 46 cooperates with the feed unit 45. The lower end of the drive unit 46 is sealed to the hollow groove.

[0036] In the above technical solution, the lifting assembly 2 drives the honing frame 41 to move downwards into the cylinder liner. When honing is required on the inner wall of the cylinder liner inner bore, the drive unit 46 drives the feed unit 45 to rotate. The feed unit 45 drives multiple honing units 43 to move outwards synchronously. Through the high-speed rotation of the honing frame 41, the honing units 43 on the outside of the honing frame 41 can perform honing on the inner wall of the cylinder liner inner bore layer by layer. After honing, the surface accuracy R of the inner wall of the cylinder liner inner bore is achieved. a Less than or equal to 1.0 μm.

[0037] See Figure 5 As shown, in a preferred embodiment, the honing unit 43 includes a sliding frame 431, a moving plate 432, a honing strip 433, a limiting block 434, a connecting spring 435, and a fixing column 436. The sliding frame 431 is slidably arranged in the groove. The sliding frame 431 has a rectangular structure. An opening groove is provided in the middle of the outer side of the sliding frame 431. The moving plate 432 is slidably arranged inside the opening groove. The honing strip 433 is installed on the outer side of the moving plate 432 by screws. The limiting blocks 434 are symmetrically installed on the inner side of the sliding frame 431. The limiting blocks 434 are slidably arranged on the outer surface of the mounting plate 42. The fixing columns 436 are evenly installed on the upper end of the mounting plate 42. A connecting spring 435 is installed between the fixing column 436 and the limiting block 434.

[0038] In the above technical solution, when the feed unit 45 drives the sliding frame 431 to move outward, the honing strip 433 will gradually come into contact with the inner wall of the cylinder liner. Through the high-speed rotation of the honing strip 433, the honing function of the inner wall of the cylinder liner can be realized. At the same time, the honing strip 433 can gradually extend outward, thereby realizing the function of honing the inner wall of the cylinder liner layer by layer, ensuring that the honed cylinder liner meets the usage requirements.

[0039] It should be noted that the honing strip 433 is replaceable. By replacing the honing strip 433 with different mesh sizes, different levels of grinding can be achieved. After the honing strip 433 has been used for a long time, the moving plate 432 is pushed out as a whole by the feeding unit 45, which facilitates the disassembly and loading of the honing strip 433. At the same time, the limiting block 434 and the connecting spring 435 play a role in limiting the sliding frame 431, so that the sliding frame 431 can remain horizontal when moving outward, and prevent the sliding frame 431 from tilting.

[0040] See Figures 4-5As shown, in a preferred embodiment, the feeding unit 45 includes an annular frame 451, a stop block 452, a slider 453, a guide rod 454, a pneumatic mechanism 455, and a feeding mechanism 456. The annular frame 451 is fixedly installed in the annular groove. The annular frame 451 has an L-shaped cross-section. Stop blocks 452 are evenly installed on the annular frame 451, and a rectangular groove is formed between adjacent stop blocks 452. A slider 453 is slidably disposed within the rectangular groove. Through holes are evenly distributed on the honing frame 41, and the through holes intersect with the rectangular groove. A guide rod 454 is slidably installed in the through hole. The inner side of the guide rod 454 is connected to the slider 453, and the outer side of the guide rod 454 is connected to the sliding frame 431. The guide rod 454 has a hollow structure inside and a pneumatic mechanism 455 is installed inside. The outer end of the pneumatic mechanism 455 passes through the sliding frame 431 and is connected to the moving plate 432. A feeding mechanism 456 is installed in the annular groove. The feeding mechanism 456 cooperates with the slider 453, and the middle part of the feeding mechanism 456 is connected to the drive unit 46.

[0041] In the above technical solution, the feed mechanism 456 is connected to the drive unit 46. When the drive unit 46 drives the feed mechanism 456 to rotate, the feed mechanism 456 drives the slider 453 to move outward synchronously through a threaded connection. This allows multiple sliders 453 to drive multiple sliding frames 431 to extend outward synchronously through the guide rod 454. The feed amount of each sliding frame 431 is the same, thereby ensuring the accuracy of the cylinder liner inner wall machining. At the same time, the pneumatic mechanism 455 is connected to the honing strip 433 through the moving plate 432, and uses air... The pressure mechanism 455 can control the extension length of the honing strip 433 located inside the sliding frame 431. That is, when honing the inner wall of the cylinder liner, both the pneumatic mechanism 455 and the feed mechanism 456 can drive the honing strip 433 to move outward. This can prevent the honing strip 433 from having different degrees of wear and thus different degrees of contact with the inner wall of the cylinder liner during synchronous feeding. Through the cooperation of the pneumatic mechanism 455 and the feed mechanism 456, the purpose of precise honing of the inner wall of the cylinder liner can be achieved.

[0042] See Figures 6-8 As shown, as a preferred technical solution of this embodiment, the pneumatic mechanism 455 includes a piston 4551 and a push rod 4552. The piston 4551 is slidably disposed in the through hole, and the push rod 4552 is installed on the outside of the piston 4551. The push rod 4552 is connected to the moving plate 432.

[0043] In the above technical solution, the inside of the hollow groove is a sealed area. Pressure is injected into the hollow groove, and under the action of pressure, the piston 4551 moves outward along the through hole. The piston 4551 drives the honing strip 433 to extend outward through the push rod 4552, so that the honing strip 433 can accurately process the inner wall of the cylinder liner.

[0044] See Figure 8 As shown, in this preferred embodiment, a touch alarm switch is installed on the outer side of the piston 4551.

[0045] In the above technical solution, after the honing strips 433 have been used for a long time, the wear degree of different honing strips 433 is different. When the wear degree of the honing strip 433 is large, it may damage the inner wall of the cylinder liner when it is used again. Therefore, when a honing strip 433 is used to its maximum extent, that is, when the piston 4551 moves outward to its farthest point, the touch alarm switch on the inner side of the piston 4551 is squeezed, which can play an alarm role and prevent excessive damage to the inner wall of the cylinder liner.

[0046] See Figures 4-5 As shown, as a preferred technical solution of this embodiment, the feeding mechanism 456 includes an annular plate 4561 and a connecting frame 4562. The annular plate 4561 is slidably disposed in the annular groove. A planar thread is provided on the inner side of the annular plate 4561. A threaded protrusion that mates with the planar thread is provided at the lower end of the slider 453. The connecting frame 4562 is installed on the inner side of the annular plate 4561 and mates with the drive unit 46.

[0047] In the above technical solution, the connecting frame 4562 is connected to the driving unit 46. The driving unit 46 can drive the annular plate 4561 to rotate through the connecting frame 4562. The annular plate 4561 can drive the slider 453 to move outward synchronously through the threaded engagement, so that the sliding frame 431 can move outward accurately.

[0048] Continue reading Figure 5 As shown, as a preferred technical solution of this embodiment, the drive unit 46 includes a drive motor 461 and a rotating shaft 462. The drive motor 461 is installed at the lower end of the hollow groove. The lower end of the drive motor 461 is sealed to the hollow groove through a sealing plate. The rotating shaft 462 is installed on the output shaft of the drive motor 461. The rotating shaft 462 is inserted into the middle of the connecting frame 4562.

[0049] In the above technical solution, the rotating shaft 462 has a raised structure. The rotating shaft 462 is inserted and matched with the connecting frame 4562 in the middle. The drive motor 461 can drive the connecting frame 4562 to rotate through the rotating shaft 462, thereby accurately adjusting the feed distance of the honing strip 433.

[0050] See Figure 1As shown, as a preferred technical solution in this embodiment, the lifting assembly 2 includes a lifting frame 21, a rotating motor 22, and a connecting rod 23. The lifting frame 21 is slidably arranged inside the fixed frame 1. The rotating motor 22 is installed at the upper end of the lifting frame 21, and the connecting rod 23 is installed at the lower end of the lifting frame 21. The upper end of the connecting rod 23 is connected to the output shaft of the rotating motor 22, and the lower end of the connecting rod 23 is installed with a honing head 4.

[0051] In the above technical solution, the lifting frame 21 can drive the honing head 4 to move up and down, and the rotating motor 22 can drive the honing head 4 to rotate at high speed through the connecting rod 23, which facilitates the accurate machining of the cylinder liner.

[0052] Continue reading Figure 1 As shown, as a preferred technical solution of this embodiment, the positioning fixture 3 includes a positioning frame 31 and a clamping frame 32. The positioning frame 31 has a rectangular structure and can move in the horizontal direction. The positioning frame 31 has a positioning hole in the middle that cooperates with the lower end of the cylinder liner. The upper end of the positioning frame 31 is uniformly provided with clamping frames 32 for pressing the outer wall of the cylinder liner.

[0053] In the above technical solution, the positioning frame 31 and the clamping frame 32 cooperate with each other to accurately clamp and fix the cylinder liner, preventing the cylinder liner from shaking during processing.

[0054] Furthermore, the present invention also provides a honing method for an engine cylinder liner inner wall honing processing equipment, which specifically includes the following steps:

[0055] S1. Cylinder liner inner bore machining: The cylinder liner inner bore is machined by turning, and the inner wall of the machined inner bore has a spiral corrugated shape.

[0056] S2, Cylinder liner clamping and positioning: The processed cylinder liner is placed inside the positioning fixture 3. The positioning fixture 3 clamps and fixes the lower end of the cylinder liner to prevent the cylinder liner from shaking.

[0057] S3. The honing head 4 moves up and down: The lifting component 2 can drive the honing head 4 to move up and down, so that the honing head 4 can accurately process the inner wall of the cylinder liner.

[0058] S4. Honing of the cylinder liner inner wall: When the honing head 4 hones the cylinder liner, the drive unit 46 drives multiple honing units 43 to move outward synchronously through the feed unit 45, so that the honing units 43 can hone the inner wall of the cylinder liner inner hole. After honing, the surface quality of the inner hole is Rk1~3μm, Ra0.4~1.6μm, Rvk≥2.0μm, and Rpk≤1.5μm.

[0059] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A honing machine for the inner wall of an engine cylinder liner, characterized in that, include: Fixed frame (1), which has a U-shaped structure; and The lifting assembly (2) is installed inside the upper part of the fixed frame (1); The positioning clamp (3) is installed inside the lower end of the fixed frame (1) and is used to clamp and fix the engine cylinder liner. The honing head (4) is installed at the lower end of the lifting assembly (2). The lifting assembly (2) is used to drive the honing head (4) to rotate at high speed and move up and down to perform honing on the inner wall of the engine cylinder liner. The honing head (4) includes a honing frame (41), a mounting plate (42), a honing unit (43), a connecting column (44), a feeding unit (45), and a driving unit (46). The honing frame (41) has a cylindrical structure. The upper and lower ends of the honing frame (41) are respectively provided with inner grooves. The mounting plate (42) is installed on the inner grooves by screws. The outer side of the mounting plate (42) is uniformly equipped with protrusions. The middle of the protrusions is provided with a sliding groove. The honing unit (46) is installed between the two symmetrically arranged protrusions. 3) A connecting column (44) is installed at the upper end of the honing frame (41), and a hollow groove is provided in the middle of the lower end of the honing frame (41). An annular groove is evenly opened from top to bottom inside the honing frame (41). A feeding unit (45) is installed in the annular groove. The outer end of the feeding unit (45) passes through the honing frame (41) and connects to the inner side of the honing unit (43). A driving unit (46) is installed inside the hollow groove. The driving unit (46) cooperates with the feeding unit (45). The lower end of the driving unit (46) is sealed to the hollow groove. The honing unit (43) includes a sliding frame (431), a moving plate (432), a honing strip (433), a limiting block (434), a connecting spring (435), and a fixing column (436); The feeding unit (45) includes an annular frame (451), a stop (452), a slider (453), a guide rod (454), a pneumatic mechanism (455), and a feeding mechanism (456). The annular frame (451) is fixedly installed in the annular groove. The annular frame (451) has an L-shaped cross-section. The stop (452) is evenly installed on the annular frame (451). A rectangular groove is set between adjacent stop (452). The slider (453) is slidably arranged in the rectangular groove. The honing frame (41) is evenly provided with through holes. The through holes correspond one-to-one with the rectangular grooves. The slider (453) slides in the through holes. A guide rod (454) is provided. The inner side of the guide rod (454) is connected to the slider (453), and the outer side of the guide rod (454) is connected to the sliding frame (431). The guide rod (454) has a hollow structure inside. A pneumatic mechanism (455) is installed inside the guide rod (454). The outer end of the pneumatic mechanism (455) passes through the sliding frame (431) and is connected to the moving plate (432). A feeding mechanism (456) is installed in the annular groove. The feeding mechanism (456) cooperates with the slider (453). The middle part of the feeding mechanism (456) is connected to the drive unit (46). The feeding mechanism (456) includes an annular plate (4561) and a connecting frame (4562); The drive unit (46) includes a drive motor (461) and a rotating shaft (462). The drive motor (461) is installed at the lower end of the hollow groove. The lower end of the drive motor (461) is sealed to the hollow groove through a sealing plate. The rotating shaft (462) is installed on the output shaft of the drive motor (461). The rotating shaft (462) is inserted into the middle of the connecting frame (4562).

2. The honing apparatus for the inner wall of an engine cylinder liner according to claim 1, characterized by: A sliding frame (431) is slidably arranged in the groove. The sliding frame (431) has a rectangular structure. An opening groove is provided in the middle of the outer side of the sliding frame (431). A moving plate (432) is slidably arranged inside the opening groove. A honing strip (433) is installed on the outer side of the moving plate (432) by screws. Limiting blocks (434) are symmetrically installed on the inner side of the sliding frame (431). The limiting blocks (434) are slidably arranged on the outer side of the mounting plate (42). Fixed columns (436) are evenly installed on the upper end of the mounting plate (42). A connecting spring (435) is installed between the fixed columns (436) and the limiting blocks (434).

3. The honing apparatus for the inner wall of an engine cylinder liner according to claim 1, characterized by: The pneumatic mechanism (455) includes a piston (4551) and a push rod (4552). The piston (4551) is slidably disposed in the through hole, and the push rod (4552) is installed on the outside of the piston (4551). The push rod (4552) is connected to the movable plate (432).

4. The honing apparatus for the inner wall of an engine cylinder liner according to claim 3, characterized by: A touch alarm switch is installed on the outer side of the piston (4551).

5. The honing apparatus for the inner wall of an engine cylinder liner according to claim 1, characterized by: An annular plate (4561) is slidably disposed in the annular groove. A planar thread is provided on the inner side of the annular plate (4561). A threaded protrusion that mates with the planar thread is provided at the lower end of the slider (453). A connecting frame (4562) is installed on the inner side of the annular plate (4561). The connecting frame (4562) mates with the drive unit (46).

6. The honing apparatus for the inner wall of an engine cylinder liner according to claim 1, characterized by: The lifting assembly (2) includes a lifting frame (21), a rotating motor (22), and a connecting rod (23). The lifting frame (21) is slidably arranged inside the fixed frame (1). The rotating motor (22) is installed on the upper end of the lifting frame (21), and the connecting rod (23) is installed on the lower end of the lifting frame (21). The upper end of the connecting rod (23) is connected to the output shaft of the rotating motor (22), and the lower end of the connecting rod (23) is equipped with a honing head (4).

7. The honing apparatus for the inner wall of an engine cylinder liner according to claim 1, characterized by: The positioning fixture (3) includes a positioning frame (31) and a clamping frame (32). The positioning frame (31) has a rectangular structure and can move horizontally. The positioning frame (31) has a positioning hole in the middle that mates with the lower end of the cylinder liner. The upper end of the positioning frame (31) is evenly provided with clamping frames (32) for pressing the outer wall of the cylinder liner.

8. A honing method for an engine cylinder liner inner wall honing machine, comprising the engine cylinder liner inner wall honing machine as described in any one of claims 1-7, characterized in that, The honing method includes the following steps: S1. Cylinder liner inner bore machining: The cylinder liner inner bore is machined by turning, and the inner wall of the machined inner bore has a spiral corrugated shape. S2, Cylinder liner clamping and positioning: The processed cylinder liner is placed inside the positioning fixture (3), and the positioning fixture (3) clamps and fixes the lower end of the cylinder liner to prevent the cylinder liner from shaking. S3. Honing head (4) moves up and down: The lifting component (2) can drive the honing head (4) to move up and down, so that the honing head (4) can accurately process the inner wall of the cylinder liner. S4. Honing of the inner wall of the cylinder liner: When the honing head (4) hones the cylinder liner, the drive unit (46) drives multiple honing units (43) to move outward synchronously through the feed unit (45), so that the honing unit (43) can hone the inner wall of the cylinder liner inner hole. After honing, the surface quality of the inner hole is Rk1~3μm, Ra0.4~1.6μm, Rvk≥2.0μm, Rpk≤1.5μm.

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