Honing machining equipment and honing method for inner wall of engine cylinder sleeve

Abstract

The invention relates to the technical field of cylinder sleeve honing, in particular to engine cylinder sleeve inner wall honing machining equipment and a honing method.The engine cylinder sleeve inner wall honing machining equipment comprises a fixed rack and a lifting assembly, and the lifting assembly is installed at the upper end of the interior of the fixed rack; the positioning clamp is installed at the lower end in the fixing rack and used for clamping and fixing the engine cylinder sleeve. The honing machining head is installed at the lower end of the lifting assembly, and the lifting assembly is used for driving the honing machining head to rotate at a high speed and move up and down so as to conduct honing machining on the inner wall of the engine cylinder sleeve. The honing units, the feeding unit and the driving unit are used in cooperation, so that when the inner wall of the inner hole of the cylinder sleeve needs to be honed, the driving unit drives the feeding unit to rotate, the feeding unit drives the multiple honing units to synchronously move outwards, and the honing units are honed through high-speed rotation of the honing frame; the honing units on the outer side of the honing frame can conduct honing machining on the inner wall of the inner hole of the cylinder sleeve layer by layer.

Description

Technical Field

[0001] The present application relates to the technical field of cylinder liner honing, and in particular to a honing processing device and a honing method for the inner wall of an engine cylinder liner. Background Art

[0002] The engine cylinder liner is an important component in the internal combustion engine. It is located in the engine cylinder block and is used to accommodate the piston and form the inner wall of the cylinder. The cylinder liner is usually made of strong metal materials such as cast iron, aluminum alloy or steel to withstand the movement of the piston under high temperature and high pressure conditions. The main functions include providing sealing to ensure that the combustion process in the cylinder does not leak; reducing friction to facilitate piston movement.

[0003] The Chinese patent with publication number CN118559597A and titled "Honing equipment, online diameter measuring honing head and honing method" specifically controls the grinding bar to continue feeding and re-acquire the air pressure in real time after the measuring nozzle is fed to the target feed amount; when the re-acquired air pressure is equal to the predetermined air pressure, the grinding bar stops feeding. Through the above settings, when the measuring nozzle is fed to the target feed amount, it means that the hole is very close to the processing requirements. When the re-acquired air pressure is equal to the predetermined air pressure, it means that the hole has reached the processing requirements, the processing is completed, and the grinding bar stops feeding.

[0004] When the above-mentioned existing technology is in use, it can also realize the function of honing the inner wall of the engine cylinder liner. However, when processing the inner wall of the cylinder liner, the above-mentioned existing technology only adjusts the extension amount of the grinding bar by changing the pressure, and cannot drive the grinding bar to feed synchronously, resulting in different degrees of wear of each grinding bar, and when the grinding bar is worn out, it cannot give an alarm in time, affecting the honing effect of the inner wall of the cylinder liner. Based on this, there is still room for improvement on the basis of the existing engine cylinder liner inner wall honing processing equipment. Summary of the invention

[0005] In order to accurately realize the function of honing the inner wall of an engine cylinder liner, the present application provides an engine cylinder liner inner wall honing processing equipment.

[0006] The present application provides an engine cylinder liner inner wall honing processing equipment adopts the following technical solution:

[0007] A honing processing device for the inner wall of an engine cylinder liner comprises a fixed frame which is in a U-shaped structure; a lifting assembly which is installed at the upper end of the fixed frame; a positioning fixture which is installed at the lower end of the fixed frame and is used to clamp and fix the engine cylinder liner; a honing processing head which is installed at the lower end of the lifting assembly and is used to drive the honing processing head to rotate at high speed and move up and down so as to perform honing processing on the inner wall of the engine cylinder liner.

[0008] The honing processing head includes a honing frame, a mounting plate, a honing unit, a connecting column, a feeding unit and a driving unit. The honing frame is in a cylindrical structure. The upper and lower ends of the honing frame are respectively provided with inner grooves, and the mounting plate is installed on the inner groove by screws. The outer side of the mounting plate is evenly provided with raised frames, and a slide groove is provided in the middle of the raised frames. The honing unit is installed between the upper and lower symmetrically arranged raised frames. 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, and the feeding unit is installed in the annular groove. The outer end of the feeding unit passes through the honing frame and is connected to the inner side of the honing unit. The driving unit is installed in the hollow groove, and the driving unit cooperates with the feeding unit. The lower end of the driving unit is sealed and connected to the hollow groove.

[0009] Further, the honing unit includes a sliding frame, a movable plate, a honing strip, a limit block, a connecting spring and a fixed column. The sliding frame is slidably arranged in the sliding groove. The sliding frame has a rectangular structure. An open groove is arranged in the middle of the outer side of the sliding frame. The movable plate is slidably arranged on the inner side of the open groove. The honing strip is installed on the outer side of the movable plate by screws. The limit blocks are symmetrically installed on the inner side of the sliding frame. The limit blocks are slidably arranged on the outer surface of the mounting plate. Fixed columns are evenly installed on the upper end of the mounting plate, and connecting springs are installed between the fixed columns and the limit blocks.

[0010] Further, the feeding unit includes an annular frame, a block, a slider, a guide rod, a pneumatic mechanism and a feeding mechanism. The annular frame is fixedly installed in the annular groove, and the cross-section of the annular frame is an L-shaped structure. Blocks are evenly installed on the annular frame, and a rectangular groove is set between adjacent blocks. A slider is slidably set in the rectangular groove. Through holes are evenly set on the honing frame, and the through holes correspond to the rectangular grooves one by one. A guide rod is slidably set in the through hole, 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 interior of the guide rod is a hollow structure, 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 movable plate. The 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 driving unit.

[0011] Furthermore, the pneumatic mechanism includes a piston and a push rod. The piston is slidably arranged in the through hole, and the push rod is installed 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.

[0013] Furthermore, the feeding mechanism includes an annular plate and a connecting frame, an annular plate is slidably arranged in the annular groove, a planar thread is arranged on the inner side of the annular plate, a threaded protrusion matching with the planar thread is arranged at the lower end of the slider, a connecting frame is installed on the inner side of the annular plate, and the connecting frame matches with the driving unit.

[0014] Furthermore, the driving unit includes a driving motor and a rotating shaft. The driving motor is installed at the lower end of the hollow groove. The lower end of the driving motor is sealed and connected to the hollow groove through a sealing plate. The rotating shaft is installed on the output shaft of the driving motor, and the rotating shaft is plugged 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, 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 processing head.

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

[0017] In addition, the present invention also provides a honing method for an engine cylinder liner inner wall honing processing equipment, and the honing method for the engine cylinder liner inner wall honing processing equipment specifically comprises the following steps:

[0018] S1. Cylinder liner inner hole processing: The inner hole of the cylinder liner is turned by turning, and the inner wall of the inner hole after turning presents a spiral corrugated structure;

[0019] S2. Clamping and positioning of cylinder sleeve: Place the processed cylinder sleeve inside the positioning fixture, and the positioning fixture clamps and fixes the lower end of the cylinder sleeve to prevent the cylinder sleeve from shaking;

[0020] S3. The honing head moves up and down: the lifting assembly 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 inner wall of the cylinder liner: When the honing head hones the cylinder liner, the driving 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 inner hole of the cylinder liner. 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 scheme, the present invention provides an engine cylinder liner inner wall honing processing equipment, and the honing unit, feed unit and drive unit provided by the present invention are used in cooperation with each other, so that when it is necessary to hone the inner wall of the cylinder liner inner hole, 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 unit outside the honing frame can hone the inner wall of the cylinder liner inner hole layer by layer, and the honing strips can be replaced. By replacing the honing strips with different mesh numbers, it can be realized Different levels of grinding processing are realized. The pneumatic mechanism is connected to the honing strips through a movable plate. The protruding length of the honing strips inside the sliding frame can be controlled by the pneumatic mechanism, that is, when the inner wall of the cylinder liner is honed, the pneumatic mechanism and the feeding mechanism can drive the honing strips to move outward, thereby preventing the different degrees of contact between the honing strips and the inner wall of the cylinder liner during synchronous feeding due to the different degrees of wear of the honing strips. Through the mutual cooperation of the pneumatic mechanism and the feeding mechanism, the purpose of precise honing of the inner wall of the cylinder liner can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the cross-sectional structure of this application.

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the honing processing head of the present application.

[0026] Figure 3 It is a schematic diagram of the cross-sectional structure of the honing processing head of the present application.

[0027] Figure 4 This application Figure 3 Schematic diagram of the enlarged structure at X in the middle.

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

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

[0030] Figure 7 It is a schematic diagram of the cross-sectional structure of the feeding unit of the present application.

[0031] Figure 8 It is a schematic diagram of the cross-sectional structure between the slider, guide rod and pneumatic mechanism of the present application.

[0032] Explanation of the reference numerals in the accompanying drawings: 1. fixed frame; 2. lifting assembly; 21. lifting frame; 22. rotating motor; 23. connecting rod; 3. positioning fixture; 31. positioning frame; 32. pressing frame; 4. honing processing head; 41. honing frame; 42. mounting plate; 43. honing unit; 431. sliding frame; 432. moving plate; 433. honing strip; 434; limit block, 435, connecting spring; 436, fixed column; 44, connecting column; 45, feeding unit; 451. annular frame; 452. stopper; 453. sliding block; 454. guide rod; 455. pneumatic mechanism; 4551. piston member; 4552. push rod; 456. feeding mechanism; 4561. annular plate; 4562. connecting frame; 46. driving unit; 461. driving motor; 462. rotating shaft. DETAILED DESCRIPTION

[0033] In order 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] See also Figure 1-8 An engine cylinder liner inner wall honing processing equipment provided in an embodiment of the present invention includes a fixed frame 1, which is a U-shaped structure; and a lifting component 2, which is installed at the upper end of the fixed frame 1; a positioning fixture 3, which is installed at the lower end of the fixed frame 1, and the positioning fixture 3 is used to clamp and fix the engine cylinder liner; a honing processing head 4, which is installed at the lower end of the lifting component 2, and the lifting component 2 is used to drive the honing processing head 4 to rotate at high speed and move up and down to hone the inner wall of the engine cylinder liner.

[0035] See also Figure 2-Figure 5 As shown, the honing processing 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 is a cylindrical structure. The upper and lower ends of the honing frame 41 are respectively provided with inner grooves, and the mounting plate 42 is installed on the inner groove by screws. The outer side of the mounting plate 42 is evenly installed with raised frames, and a sliding groove is provided in the middle of the raised frame. A honing unit is installed between the upper and lower symmetrically arranged raised frames. Element 43, a connecting column 44 is installed at the upper end of the honing frame 41, a hollow groove is set in the middle of the lower end of the honing frame 41, annular grooves are evenly opened inside the honing frame 41 from top to bottom, 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 is connected to the inner side of the honing unit 43, a driving unit 46 is installed in the hollow groove, the driving unit 46 cooperates with the feeding unit 45, and the lower end of the driving unit 46 is sealed and connected to the hollow groove.

[0036] In the above technical solution, the lifting assembly 2 drives the honing frame 41 to move downward to the inside of the cylinder liner. When the inner wall of the inner hole of the cylinder liner needs to be honed, the driving unit 46 drives the feeding unit 45 to rotate, and the feeding unit 45 drives the multiple honing units 43 to move outward synchronously. Through the high-speed rotation of the honing frame 41, the honing units 43 on the outside of the honing frame 41 can hone the inner wall of the inner hole of the cylinder liner layer by layer. After honing, the surface accuracy R of the inner wall of the inner hole of the cylinder liner is a Less than and equal to 1.0μm.

[0037] See also Figure 5 As shown, as a preferred technical solution of this embodiment, the honing unit 43 includes a sliding frame 431, a movable plate 432, a honing strip 433, a limit block 434, a connecting spring 435 and a fixed column 436, the sliding frame 431 is slidably arranged in the sliding groove, the sliding frame 431 is of a rectangular structure, an open groove is arranged in the middle of the outer side of the sliding frame 431, the moving plate 432 is slidably arranged on the inner side of the open groove, the honing strip 433 is installed on the outer side of the moving plate 432 by screws, the limit blocks 434 are symmetrically installed on the inner side of the sliding frame 431, the limit blocks 434 are slidably arranged on the outer side of the mounting plate 42, the fixing columns 436 are evenly installed on the upper end of the mounting plate 42, and the connecting spring 435 is installed between the fixing column 436 and the limit 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 contact the inner wall of the cylinder liner, and the high-speed rotation of the honing strip 433 can realize the function of honing the inner wall of the cylinder liner. At the same time, the honing strip 433 can gradually extend outward, and then the function of honing the inner wall of the cylinder liner layer by layer can be realized, ensuring that the honed cylinder liner meets the use requirements.

[0039] It should be noted that the honing bars 433 are replaceable. By replacing the honing bars 433 with different mesh sizes, different levels of grinding processing can be achieved. After the honing bars 433 have been used for a long time, the movable plate 432 is pushed out as a whole through the feeding unit 45 to facilitate the disassembly and loading of the honing bars 433. At the same time, the limit block 434 and the connecting spring 435 play a role in limiting the sliding frame 431, so that the sliding frame 431 can maintain a horizontal state when moving outward, thereby avoiding the sliding frame 431 from tilting.

[0040] See also Figure 4-Figure 5As shown, as a preferred technical solution of this embodiment, the feeding unit 45 includes an annular frame 451, a stopper 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, and the cross section of the annular frame 451 is an L-shaped structure. The stoppers 452 are evenly installed on the annular frame 451. A rectangular groove is set between adjacent stoppers 452. The slider 453 is slidably set in the rectangular groove. The honing frame 41 is evenly provided with through holes, and the through holes and the rectangular grooves are connected. In one-to-one correspondence, a guide rod 454 is slidably arranged in the through hole, the inner side of the guide rod 454 is connected to the slider 453, the outer side of the guide rod 454 is connected to the sliding frame 431, the interior of the guide rod 454 is a hollow structure, 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, and the middle part of the feeding mechanism 456 is connected to the driving unit 46.

[0041] In the above technical solution, the feeding mechanism 456 is connected to the driving unit 46. When the driving unit 46 drives the feeding mechanism 456 to rotate, the feeding mechanism 456 drives the slider 453 to move outward synchronously through threaded cooperation, so that the multiple sliders 453 can drive the multiple sliding frames 431 to extend outward synchronously through the guide rod 454. The feeding amount of each sliding frame 431 is the same, thereby ensuring the accuracy of the inner wall processing of the cylinder liner. At the same time, the pneumatic mechanism 455 is connected to the honing stick 433 through the moving plate 432, and the pneumatic mechanism 455 is connected to the honing stick 433 through the pneumatic mechanism 455. The pressure mechanism 455 can control the extension length of the honing strips 433 located inside the sliding frame 431, that is, when the inner wall of the cylinder liner is honed, the pneumatic mechanism 455 and the feeding mechanism 456 can both drive the honing strips 433 to move outward, thereby preventing the different degrees of contact between the honing strips 433 and the inner wall of the cylinder liner during synchronous feeding due to different degrees of wear of the honing strips 433. Through the mutual cooperation of the pneumatic mechanism 455 and the feeding mechanism 456, the purpose of accurately honing the inner wall of the cylinder liner can be achieved.

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

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

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

[0045] In the above technical solution, after the honing bars 433 are used for a long time, since the degrees of wear of different honing bars 433 are different, when the degree of wear of the honing bars 433 is large, it may cause damage to the inner wall of the cylinder liner when used again. Therefore, when a certain honing bar 433 is used to the maximum extent, that is, the piston member 4551 moves outward to the farthest point, the touch alarm switch on the inner side of the piston member 4551 is squeezed, which can play an alarm effect to prevent excessive damage to the inner wall of the cylinder liner.

[0046] See also Figure 4-Figure 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, an annular plate 4561 is slidably arranged in the annular groove, a planar thread is arranged on the inner side surface of the annular plate 4561, a threaded protrusion cooperating with the planar thread is arranged at the lower end of the slider 453, a connecting frame 4562 is installed on the inner side of the annular plate 4561, and the connecting frame 4562 cooperates with the driving unit 46.

[0047] In the above technical solution, the connecting frame 4562 is connected to the driving unit 46, and 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 threaded cooperation, 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 driving unit 46 includes a driving motor 461 and a rotating shaft 462. The driving motor 461 is installed at the lower end of the hollow groove, and the lower end of the driving motor 461 is sealed and connected to the hollow groove through a sealing plate. The rotating shaft 462 is installed on the output shaft of the driving motor 461, and the rotating shaft 462 is plugged into the middle of the connecting frame 4562.

[0049] In the above technical solution, the rotating shaft 462 is a convex structure, and the rotating shaft 462 is plugged into the middle of the connecting frame 4562. The driving motor 461 can drive the connecting frame 4562 to rotate through the rotating shaft 462, thereby accurately adjusting the feed distance of the honing stick 433.

[0050] See also Figure 1As shown, as the preferred technical solution of 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 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 installed with a honing processing 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, thereby facilitating accurate processing 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 is a rectangular structure. The positioning frame 31 can move in the horizontal direction. A positioning hole that cooperates with the lower end of the cylinder liner is arranged in the middle of the positioning frame 31, and a clamping frame 32 for clamping the outer wall of the cylinder liner is evenly arranged on the upper end of the positioning frame 31.

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

[0054] In addition, the present invention also provides a honing method for an engine cylinder liner inner wall honing processing equipment, and the honing method for the engine cylinder liner inner wall honing processing equipment specifically comprises the following steps:

[0055] S1. Cylinder liner inner hole processing: The inner hole of the cylinder liner is turned by turning, and the inner wall of the inner hole after turning is spiral corrugated;

[0056] S2. Clamping and positioning of the cylinder liner: placing the processed cylinder liner 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;

[0057] S3, the honing head 4 moves up and down: the lifting assembly 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 inner wall of the cylinder liner: When the honing head 4 hones the cylinder liner, the driving unit 46 drives the multiple honing units 43 to move outward synchronously through the feeding unit 45, so that the honing unit 43 can hone the inner wall of the inner hole of the cylinder liner. After honing, the surface quality of the inner hole is Rk1~3μm, Ra0.4~1.6μm, Rvk≥2.0μm, Rpk≤1.5μm.

[0059] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that 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 above 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. An engine cylinder liner inner wall honing equipment, characterized in that: include: A fixed frame (1) having a U-shaped structure; and A lifting assembly (2) mounted on the upper end of the fixed frame (1); A positioning fixture (3) is installed at the lower end of the fixed frame (1), and the positioning fixture (3) is used to clamp and fix the engine cylinder liner; A honing head (4) is mounted 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; The honing processing head (4) comprises 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) is a cylindrical structure; the upper and lower ends of the honing frame (41) are respectively provided with inner grooves; the mounting plate (42) is mounted on the inner groove by screws; the outer side of the mounting plate (42) is evenly provided with raised frames; the middle of the raised frames is provided with a sliding groove; the honing unit (43) is mounted between the upper and lower symmetrically arranged raised frames 3), a connecting column (44) is installed at the upper end of the honing frame (41), a hollow groove is arranged 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 is connected to the inner side of the honing unit (43), a driving unit (46) is installed in the hollow groove, the driving unit (46) cooperates with the feeding unit (45), and the lower end of the driving unit (46) is sealed and connected to the hollow groove.

2. The engine cylinder liner inner wall honing equipment according to claim 1, characterized in that: The honing unit (43) comprises 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 sliding groove. The sliding frame (431) is of a rectangular structure. An opening groove is arranged 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 side of the mounting plate (42). The fixing columns (436) are evenly installed on the upper end of the mounting plate (42). The connecting spring (435) is installed between the fixing column (436) and the limiting block (434).

3. The engine cylinder liner inner wall honing equipment according to claim 2, characterized in that: The feeding unit (45) comprises an annular frame (451), a stopper (452), a slide block (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 cross section of the annular frame (451) is in an L-shaped structure; the annular frame (451) is evenly installed with stoppers (452); a rectangular groove is arranged between adjacent stoppers (452); a slide block (453) is slidably arranged in the rectangular groove; and through holes are evenly arranged on the honing frame (41); the through holes correspond to the rectangular grooves one by one; the slide blocks (453) are slidably arranged in the through holes. A guide rod (454) is provided, the inner side of the guide rod (454) is connected to the slider (453), the outer side of the guide rod (454) is connected to the sliding frame (431), the interior of the guide rod (454) is a hollow structure, 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) is matched with the slider (453), and the middle part of the feeding mechanism (456) is connected to the driving unit (46).

4. The engine cylinder liner inner wall honing equipment according to claim 3, characterized in that: The pneumatic mechanism (455) comprises a piston member (4551) and a push rod (4552). The piston member (4551) is slidably arranged in the through hole, and the push rod (4552) is installed outside the piston member (4551). The push rod (4552) is connected to the movable plate (432).

5. The engine cylinder liner inner wall honing equipment according to claim 4, characterized in that: A touch alarm switch is installed on the outer side of the piston member (4551).

6. The engine cylinder liner inner wall honing equipment according to claim 5, characterized in that: The feeding mechanism (456) comprises an annular plate (4561) and a connecting frame (4562), the annular plate (4561) is slidably arranged in the annular groove, a planar thread is arranged on the inner side surface of the annular plate (4561), a threaded protrusion cooperating with the planar thread is arranged at the lower end of the slider (453), a connecting frame (4562) is installed on the inner side of the annular plate (4561), and the connecting frame (4562) cooperates with the driving unit (46).

7. The engine cylinder liner inner wall honing equipment according to claim 6, characterized in that: The driving unit (46) comprises a driving motor (461) and a rotating shaft (462); the driving motor (461) is installed at the lower end of the hollow groove; the lower end of the driving motor (461) is sealed and connected to the hollow groove via a sealing plate; the rotating shaft (462) is installed on the output shaft of the driving motor (461); the rotating shaft (462) is plug-fitted with the middle part of the connecting frame (4562).

8. The engine cylinder liner inner wall honing equipment according to claim 1, characterized in that: The lifting assembly (2) comprises 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); 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 processing head (4).

9. The engine cylinder liner inner wall honing equipment according to claim 1, characterized in that: The positioning fixture (3) comprises a positioning frame (31) and a pressing frame (32); the positioning frame (31) is of a rectangular structure; the positioning frame (31) can move in a horizontal direction; a positioning hole matching the lower end of the cylinder sleeve is arranged in the middle of the positioning frame (31); and a pressing frame (32) for pressing the outer wall of the cylinder sleeve is evenly arranged at the upper end of the positioning frame (31).

10. A honing method for an engine cylinder liner inner wall honing processing equipment, comprising an engine cylinder liner inner wall honing processing equipment as claimed in any one of claims 1 to 9, characterized in that: The honing method comprises the following steps: S1. Cylinder liner inner hole processing: The inner hole of the cylinder liner is turned by turning, and the inner wall of the inner hole after turning is spiral corrugated; S2. Clamping and positioning of the cylinder liner: placing the processed cylinder liner 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, the honing processing head (4) moves up and down: the lifting assembly (2) can drive the honing processing head (4) to move up and down, so that the honing processing 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 driving unit (46) drives the multiple honing units (43) to move outward synchronously through the feeding unit (45), so that the honing units (43) can hone the inner wall of the inner hole of the cylinder liner. After honing, the surface quality of the inner hole is Rk1~3μm, Ra0.4~1.6μm, Rvk≥2.0μm, and Rpk≤1.5μm.

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