A method for processing the large-hole platform texture of a hinge connecting rod

Abstract

This invention discloses a method for processing a large-hole plateau texture on a honing connecting rod, relating to the field of connecting rod large-hole processing technology. The method includes: Step 1, placing the connecting rod to be processed in a cleaning device to remove surface oil; Step 2, using the pre-treated connecting rod as the anode, connecting it to the positive terminal of a DC power supply, and placing the connecting rod connected to the anode inside an electrolytic cell; Step 3, setting an ultrasonic transducer on the honing mechanism, where the honing ball, in addition to its conventional rotation and axial honing motion, is superimposed with ultrasonic vibrations generated by the ultrasonic transducer, with a frequency stable in the range of 20kHz-100kHz; Step 4, using the honing equipment to drive the honing ball to perform conventional rotation and axial feed to form the plateau texture; Step 5, after processing, removing the connecting rod, rinsing, and drying it. This method overcomes the shortcomings of traditional honing methods in terms of precision, efficiency, and surface quality, achieving high-quality processing of connecting rod materials of various hardnesses.

Description

Technical Field

[0001] This invention relates to the field of connecting rod large hole processing technology, specifically a method for processing the large hole platform texture of a honing connecting rod. Background Technology

[0002] The crankshaft and connecting rod mechanism is the main moving mechanism of an automobile engine, consisting of three parts: the engine block assembly, the piston and connecting rod assembly, and the crankshaft and flywheel assembly. The connecting rod, as a crucial component of the piston and connecting rod assembly, primarily connects the piston and crankshaft, transmitting the force acting on the piston to the crankshaft and converting the reciprocating motion of the piston into the rotational motion of the crankshaft.

[0003] For example, the Chinese authorized patent CN107775520B, "A Processing Method for Mesh Patterns on a Connecting Rod with Large Hole Platform," uses multi-axis honing with honing balls of different grit sizes and honing parameters to process uniform mesh pattern parameters on the surface. This provides sufficient friction and support between the inner wall of the large hole and the outer wall of the bearing, effectively preventing bearing slippage.

[0004] The aforementioned existing technologies, when used with materials of high hardness, result in high cutting forces, leading to rapid tool wear, low processing efficiency, and difficulty in ensuring the accuracy and surface quality of the honing pattern. Furthermore, traditional honing processes suffer from difficult chip removal and limited cutting fluid lubrication, easily leaving scratches and defects on the machined surface, affecting the fatigue strength and wear resistance of the connecting rod. Therefore, they do not meet current requirements. To address this, we propose a method for machining the large-hole platform honing pattern on connecting rods. Summary of the Invention

[0005] The purpose of this invention is to provide a method for processing the large-hole platform texture of a honing connecting rod, so as to overcome the shortcomings of the traditional honing methods mentioned in the background art in terms of accuracy, efficiency and surface quality, and to achieve high-quality processing of connecting rod materials of various hardness.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for processing the large-hole platform texture of a honing connecting rod, comprising the following steps:

[0007] Step 1, Pre-treatment: Place the connecting rod to be processed in the cleaning equipment, add cleaning agent, set the temperature to 40℃-60℃, and clean for 10-20 minutes to remove oil, dust and impurities from the surface of the connecting rod. Immerse the cleaned connecting rod in a 5%-10% degreasing agent and degrease it at 30℃-50℃ for 15-30 minutes to deeply remove surface oil.

[0008] Step 2: Using the pretreated connecting rod as the anode, connect it to the positive terminal of the DC power supply. Place the connecting rod with the anode inside the electrolytic cell, adjust the DC power supply, and set appropriate initial parameters. Based on the hardness of the connecting rod material and the processing efficiency requirements, initially set the current density at 10-50 A / dm³. 2The voltage is initially set between 5-20V based on the chemical properties and concentration of the electrolyte and the characteristics of the connecting rod material, and the voltage fluctuation is kept within ±0.5V throughout the entire processing.

[0009] Step 3: Install an ultrasonic transducer on the honing mechanism. On the basis of the conventional rotation and axial honing motion of the honing ball, ultrasonic vibration generated by the ultrasonic transducer with a frequency stable in the range of 20kHz-100kHz is superimposed.

[0010] Step 4: Using the honing equipment, initially set the honing ball speed between 100-500 r / min, and initially set the axial feed speed between 0.1-1 mm / min. Based on the material hardness and the current processing stage, initially set the honing ball pressure between 0.5-3 MPa, with pressure fluctuation controlled within ±0.05 MPa. Finally, the honing equipment starts to drive the honing balls to perform normal rotation and axial feed to form the platform texture.

[0011] Step 5: After processing, remove the connecting rod, rinse it with a high-pressure water gun, and then put the connecting rod into a hot air drying oven to dry the surface of the connecting rod completely.

[0012] Preferably, the honing equipment includes an electrolytic cell, with side support plates welded and fixed to both sides of the upper end of the electrolytic cell. A top plate is installed on the upper end of the two side support plates. A hydraulic lifting device is fixed to the front and rear of the upper surface of the top plate by bolts. A connecting rod positioning mechanism is provided on the rear side of the lower end of the top plate, and a connecting rod honing mechanism is provided on the front side of the lower end of the top plate. A cathode plate is installed on one side of the inner cavity of the electrolytic cell.

[0013] Preferably, the linkage positioning mechanism includes an adjusting frame, and the upper end face of the adjusting frame is fixed to the movable end of the rear hydraulic lifting device. A clamping frame is fixedly provided on the inner side of the vertical plate of the adjusting frame. A movable frame is movably installed on the inner side of the clamping frame. A clamping plate is installed on the inner side of the movable frame. The clamping plate is used to fix the rod body part of the linkage. An anode plate is installed on the inner wall of the clamping plate.

[0014] Preferably, a screw is rotatably mounted inside the clamping frame, extending into the interior of the movable frame, and the external thread of the screw is adapted to the internal thread hole of the movable frame. An adjusting wheel is rotatably mounted at the middle position of the front end of the horizontal plate of the adjusting frame. A first drive shaft is rotatably mounted inside each of the vertical plates of the adjusting frame, and the lower end of the first drive shaft meshes with one end of the screw through a helical gear. A second drive shaft is rotatably mounted on both sides inside the horizontal plate of the adjusting frame, and the upper end of the first drive shaft meshes with one end of the second drive shaft through a helical gear, and the other end of the second drive shaft meshes with the shaft of the adjusting wheel through a helical gear.

[0015] Preferably, the connecting rod honing mechanism includes a driving device, and the top end of the driving device is fixed to the movable end of the front hydraulic lifting device. A transducer is installed on the outside of the lower shaft of the driving device, and an amplitude rod is installed on the lower end of the transducer. The amplitude rod wraps around the output shaft of the driving device. A honing spindle is installed at the bottom of the output shaft of the driving device. Multiple sets of annularly distributed elastic rods are fixedly provided on the outside of the honing spindle, and honing balls are fixedly provided on the outer ends of the elastic rods.

[0016] Preferably, an electrolyte filtration device is installed on one side of the electrolytic cell. The electrolyte filtration device consists of a circulation pump and a filtration mechanism, and the connecting pipe at the outlet of the circulation pump extends into the interior of the electrolytic cell.

[0017] Preferably, the flow rate of the circulating pump is adjustable between 10-30 L / min, and the filtration mechanism includes a coarse filter, a medium filter, and a fine filter. The coarse filter has a filtration accuracy of 100 μm, the medium filter has a filtration accuracy of 10 μm, and the fine filter has a filtration accuracy of 1 μm.

[0018] Preferably, in step two, a current monitoring device is also installed between the DC power supply and the anode to monitor current changes in real time. When the current fluctuation exceeds the set range, the DC power supply output is automatically adjusted to maintain the current density.

[0019] Preferably, in step four, a pressure distribution monitoring device is installed at the contact point between the honing ball and the connecting rod bore to monitor the pressure distribution in real time. When uneven pressure distribution is detected, the feed parameters of the honing equipment are adjusted.

[0020] Preferably, in step five, the water pressure of the high-pressure water gun can be adjusted between 0.5-1 MPa. The appropriate water pressure is selected for rinsing based on the amount of residual electrolyte on the connecting rod surface and the fineness of the mesh pattern.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention employs ultrasonic-assisted honing. An ultrasonic transducer is installed on the honing ball, superimposing ultrasonic vibrations at frequencies between 20kHz and 100kHz onto the ball during conventional rotational and axial feed honing movements. This ultrasonic vibration reduces cutting forces, resulting in a smoother honing process and reduced tool wear. Its cavitation effect promotes the formation of microbubbles in the cutting fluid. When these bubbles burst, they generate localized high pressure and high temperature, enhancing the cutting fluid's penetration, improving cooling and lubrication, and facilitating chip removal. This results in the creation of a uniform, clear, high-quality honing pattern, effectively reducing tool sticking and improving the surface finish of the honing pattern.

[0023] 2. This invention employs electrochemical-assisted honing, using the connecting rod to be processed as the anode, both placed in an electrolyte. Under the action of a DC electric field, the metal atoms on the surface of the large holes in the connecting rod lose electrons, undergoing electrochemical dissolution, thereby reducing the material hardness and facilitating subsequent honing. By controlling the current density in the initial stage of processing and the value in the pattern forming stage, the amount of material removed can be precisely controlled, achieving precise control over the depth, width, and shape of the pattern. For high-hardness alloy steel connecting rods, reducing the material hardness through electrochemical dissolution can significantly improve honing efficiency and pattern accuracy.

[0024] 3. The ultrasonic-assisted honing and electrochemical-assisted honing of this invention can work synergistically. The cavitation effect generated by ultrasonic vibration accelerates the diffusion and migration of ions in the electrolyte, making the electrochemical dissolution reaction on the anode surface more uniform and efficient. Simultaneously, electrochemical dissolution reduces the material hardness, further reducing the cutting force required for ultrasonic-assisted honing. The two processes mutually promote each other, improving overall machining performance. During processing, ultrasonic vibration allows charged ions in the electrolyte to reach the anode surface more quickly, enhancing the electrochemical dissolution effect. The soft material after electrochemical dissolution is more easily removed by honing under ultrasonic assistance, forming a precise network structure. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present invention;

[0026] Figure 2 This is a perspective view of the honing process of the connecting rod body of the present invention;

[0027] Figure 3 This is a schematic diagram of the internal structure of the adjustment frame of the present invention;

[0028] Figure 4 This is a side view of the present invention;

[0029] Figure 5 For the present invention Figure 4 Sectional view of section AA.

[0030] In the diagram: 1. Electrolytic cell; 2. Side support plate; 3. Top plate; 4. Hydraulic lifting device; 5. Adjusting frame; 6. Adjusting wheel; 7. Clamping frame; 8. Clamping plate; 9. Connecting rod body; 10. Drive device; 11. Transducer; 12. Amplifier rod; 13. Anode plate; 14. Cathode plate; 15. Electrolyte filtration device; 16. Elastic rod; 17. Honing ball; 18. Screw; 19. Movable frame; 20. First drive shaft; 21. Second drive shaft. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Please see Figure 1-5 The present invention provides an embodiment of a method for processing the large-hole platform texture of a hinge connecting rod, comprising the following steps:

[0033] Step 1, Pre-treatment: Place the connecting rod to be processed in the cleaning equipment, add cleaning agent, set the temperature to 40℃-60℃, and clean for 10-20 minutes to remove oil, dust and impurities from the surface of the connecting rod. Immerse the cleaned connecting rod in a 5%-10% degreasing agent and degrease it at 30℃-50℃ for 15-30 minutes to deeply remove surface oil.

[0034] Step 2: Using the pretreated connecting rod as the anode, connect it to the positive terminal of the DC power supply. Place the connecting rod with the anode inside the electrolytic cell, adjust the DC power supply, and set appropriate initial parameters. Based on the hardness of the connecting rod material and the processing efficiency requirements, initially set the current density at 10-50 A / dm³. 2 The voltage is initially set between 5-20V based on the chemical properties and concentration of the electrolyte and the characteristics of the connecting rod material. The voltage fluctuation is kept within ±0.5V throughout the entire processing. A current monitoring device is installed between the DC power supply and the anode to monitor the current change in real time. When the current fluctuation exceeds the set range, the DC power supply output is automatically adjusted to maintain the current density.

[0035] Step 3: Install an ultrasonic transducer on the honing mechanism. On the basis of the conventional rotation and axial honing motion of the honing ball, ultrasonic vibration generated by the ultrasonic transducer with a frequency stable in the range of 20kHz-100kHz is superimposed.

[0036] Step 4: Using the honing equipment, initially set the honing ball speed between 100-500 r / min and the axial feed speed between 0.1-1 mm / min. Based on the material hardness and the current processing stage, initially set the honing ball pressure between 0.5-3 MPa, with pressure fluctuation controlled within ±0.05 MPa. Finally, the honing equipment starts to drive the honing ball to perform normal rotation and axial feed to form the platform pattern. A pressure distribution monitoring device is installed at the contact point between the honing ball and the connecting rod large hole to monitor the pressure distribution in real time. If uneven pressure distribution is found, adjust the feed parameters of the honing equipment.

[0037] Step 5: After processing, remove the connecting rod and rinse it with a high-pressure water gun. Then, put the connecting rod into a hot air drying oven to dry the surface of the connecting rod completely. The water pressure of the high-pressure water gun can be adjusted between 0.5-1MPa. Choose an appropriate water pressure for rinsing according to the amount of residual electrolyte on the surface of the connecting rod and the fineness of the mesh.

[0038] Ultrasonic-assisted honing and electrochemical-assisted honing can work synergistically. The cavitation effect generated by ultrasonic vibration accelerates the diffusion and migration of ions in the electrolyte, making the electrochemical dissolution reaction on the anode surface more uniform and efficient. Simultaneously, electrochemical dissolution reduces material hardness, further reducing the cutting force required for ultrasonic-assisted honing. These two processes mutually promote each other, improving overall machining performance. During processing, ultrasonic vibration allows charged ions in the electrolyte to reach the anode surface more quickly, enhancing the electrochemical dissolution effect. The soft material after electrochemical dissolution is more easily removed by honing under ultrasonic assistance, forming a precise network structure.

[0039] Please see Figure 1 Based on honing equipment, it includes an electrolytic cell 1, with side support plates 2 welded and fixed on both sides of the upper end of the electrolytic cell 1. A top plate 3 is installed on the upper end of the two side support plates 2. A hydraulic lifting device 4 is fixed to the front and rear of the upper surface of the top plate 3 by bolts. A connecting rod positioning mechanism is provided on the rear side of the lower end of the top plate 3, and a connecting rod honing mechanism is provided on the front side of the lower end of the top plate 3. A cathode plate 14 is installed on one side of the inner cavity of the electrolytic cell 1.

[0040] Please see Figure 1 , Figure 2 and Figure 3 The linkage positioning mechanism includes an adjusting frame 5, the upper end face of which is fixed to the movable end of the rear hydraulic lifting device 4. Clamping frames 7 are fixedly installed on the inner side of the vertical plates of the adjusting frame 5. A movable frame 19 is movably installed on the inner side of the clamping frame 7. A clamping plate 8 is installed on the inner side of the movable frame 19. The clamping plate 8 is used to fix the rod body of the linkage. An anode plate 13 is installed on the inner wall of the clamping plate 8. A screw 18 is rotatably installed inside the clamping frame 7, extending into the interior of the movable frame 19, and the external thread of the screw 18... The adjusting frame 5 is adapted to the internal threaded hole of the adjusting frame 19. An adjusting wheel 6 is rotatably installed at the middle position of the front end of the upper horizontal plate of the adjusting frame 5. The first drive shaft 20 is rotatably installed inside the vertical plate of the adjusting frame 5. The lower end of the first drive shaft 20 is meshed with one end of the screw 18 through a helical gear. The second drive shaft 21 is rotatably installed on both sides inside the upper horizontal plate of the adjusting frame 5. The upper end of the first drive shaft 20 is meshed with one end of the second drive shaft 21 through a helical gear, and the other end of the second drive shaft 21 is meshed with the shaft of the adjusting wheel 6 through a helical gear.

[0041] By rotating the adjusting wheel 6, the first transmission shaft 20 is driven to rotate through the second transmission shaft 21 under the meshing action of the helical gear. The first transmission shaft 20 drives the screw 18 to rotate. Under the friction between the screw 18 and the inner threaded hole of the movable frame 19, and with the guiding action of the clamping frame 7 on the movable frame 19, the movable frame 19 drives the clamping plate 8 to move towards the connecting rod until clamping is achieved, providing stable clamping for subsequent honing.

[0042] Please see Figure 2 and Figure 5 The connecting rod honing mechanism includes a drive unit 10, and the top end of the drive unit 10 is fixed to the movable end of the front hydraulic lifting device 4. A transducer 11 is installed on the outside of the lower shaft of the drive unit 10. An amplitude rod 12 is installed on the lower end of the transducer 11, and the amplitude rod 12 is wrapped around the output shaft of the drive unit 10. A honing spindle is installed at the bottom of the output shaft of the drive unit 10. Multiple sets of annularly distributed elastic rods 16 are fixedly provided on the outside of the honing spindle, and honing balls 17 are fixedly provided on the outer ends of the elastic rods 16.

[0043] Please see Figure 1 An electrolyte filtration device 15 is installed on one side of the electrolytic cell 1. The electrolyte filtration device 15 consists of a circulation pump and a filtration mechanism. The connecting pipe at the outlet of the circulation pump extends into the interior of the electrolytic cell 1. The flow rate of the circulation pump is adjustable between 10-30 L / min. The filtration mechanism includes coarse filtration, medium filtration and fine filtration. The filtration accuracy of the coarse filtration is 100 μm, the filtration accuracy of the medium filtration is 10 μm and the filtration accuracy of the fine filtration is 1 μm. The electrolyte is kept circulating and clean. The impurity content of the filtered electrolyte is less than 10 ppm.

[0044] Example 1: Machining of Aluminum Alloy Connecting Rods

[0045] Equipment preparation: An ultrasonic generation system is composed of an ultrasonic transducer and an ultrasonic generator. The electrochemical system uses a DC power supply, the electrolyte storage tank has a volume of 50 liters, the circulation pump flow rate is 10 L / min, and the filtration accuracy is 0.1 μm.

[0046] Process parameter settings: ultrasonic frequency set to 30kHz, amplitude to 10 micrometers; initial current density set to 15A / dm. 2 The mesh forming stage was reduced to 8A / dm. 2 The voltage is 10V; the honing head speed is 250r / min, the axial feed speed is 0.5mm / min, the initial honing head pressure is 1.5MPa, and it is reduced to 0.8MPa during the forming stage.

[0047] Processing procedure: The operation was carried out according to the processing flow, and various parameters were monitored in real time during the process. After testing, the depth accuracy of the large hole platform of the processed aluminum alloy connecting rod reached ±0.005mm, the width accuracy reached ±0.01mm, and the surface roughness Ra was 0.2μm, which fully met the design requirements. The processing efficiency was improved by 40% compared with traditional honing.

[0048] Example 2: Machining of Alloy Steel Connecting Rods

[0049] Equipment preparation: The DC power output capacity of the electrochemical system was enhanced, the electrolyte storage tank volume was adjusted to 80 liters, and the circulation pump flow rate was set to 15 L / min.

[0050] Process parameter settings: ultrasonic frequency increased to 80kHz, amplitude 20 micrometers; initial current density set to 40A / dm. 2 The mesh forming stage was reduced to 12A / dm. 2 The voltage is 15V; the honing head speed is 200r / min, the axial feed speed is 0.3mm / min, the initial honing head pressure is 2.5MPa, and it is reduced to 1MPa during the forming stage.

[0051] Processing procedure: The processing was strictly carried out according to the established procedures, and the processed alloy steel connecting rods were inspected. Results showed that the texture depth accuracy reached ±0.006mm, the width accuracy reached ±0.012mm, the surface roughness Ra was 0.25μm, and the processing efficiency was improved by 35%, proving that this technical solution also has good effects on the processing of alloy steel connecting rods.

[0052] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A method for processing the large-hole platform texture of a hinge connecting rod, characterized in that: Includes the following steps: Step 1, Pre-treatment: Place the connecting rod to be processed in the cleaning equipment, add cleaning agent, set the temperature to 40℃-60℃, and clean for 10-20 minutes to remove oil, dust and impurities from the surface of the connecting rod. Immerse the cleaned connecting rod in a 5%-10% degreasing agent and degrease it at 30℃-50℃ for 15-30 minutes to deeply remove surface oil. Step 2: The pre-treated connecting rod is used as the anode and connected to the positive terminal of the DC power supply. The connecting rod with the anode is placed inside the electrolytic cell. The DC power supply is adjusted and the initial parameters are set. According to the hardness of the connecting rod material and the processing efficiency requirements, the initial current density is initially set between 10-50A / dm². The voltage is initially set between 5-20V according to the chemical properties and concentration of the electrolyte and the characteristics of the connecting rod material. The voltage fluctuation is controlled within ±0.5V throughout the entire processing process. Step 3: Install an ultrasonic transducer on the connecting rod honing mechanism of the honing equipment. On the basis of the conventional rotation and axial honing motion of the honing ball, ultrasonic vibration generated by the ultrasonic transducer with a frequency stable in the range of 20kHz-100kHz is superimposed. Step 4: Using the honing equipment, initially set the honing ball speed between 100-500 r / min, and initially set the axial feed speed between 0.1-1 mm / min. Based on the material hardness and the current processing stage, initially set the honing ball pressure between 0.5-3 MPa, with pressure fluctuation controlled within ±0.05 MPa. Finally, the honing equipment starts to drive the honing balls to perform normal rotation and axial feed to form the platform texture. Step 5: After processing, remove the connecting rod, rinse it with a high-pressure water gun, and then put the connecting rod into a hot air drying oven to dry the surface of the connecting rod completely. The cathode plate (14) is installed on one side of the inner cavity of the electrolytic cell (1). The connecting rod honing mechanism includes a drive device (10). A honing spindle is installed at the bottom of the output shaft of the drive device (10). Multiple sets of annularly distributed elastic rods (16) are fixedly provided on the outside of the honing spindle. A honing ball (17) is fixedly provided at the outer end of each elastic rod (16).

2. The method for processing the large-hole platform texture of a honing connecting rod according to claim 1, implemented using honing equipment, is characterized in that: The electrolytic cell (1) is provided with side support plates (2) welded and fixed on both sides of the upper end of the electrolytic cell (1). A top plate (3) is installed on the upper end of the two side support plates (2). A hydraulic lifting device (4) is fixed to the front and back of the upper surface of the top plate (3) by bolts. A connecting rod positioning mechanism is provided on the rear side of the lower end of the top plate (3). A connecting rod honing mechanism is provided on the front side of the lower end of the top plate (3).

3. The method for processing the large-hole platform texture of a honing connecting rod according to claim 2, characterized in that: The linkage positioning mechanism includes an adjustment frame (5), and the upper end face of the adjustment frame (5) is fixed to the movable end of the hydraulic lifting device (4) on the rear side. A clamping frame (7) is fixedly provided on the inner side of the vertical plate of the adjustment frame (5). A movable frame (19) is movably installed on the inner side of the clamping frame (7). A clamping plate (8) is installed on the inner side of the movable frame (19). The clamping plate (8) is used to fix the rod body part of the linkage. An anode plate (13) is installed on the inner wall of the clamping plate (8).

4. The processing method for the large-hole platform texture of a honing connecting rod according to claim 3, characterized in that: A screw (18) is rotatably mounted inside the clamping frame (7). The screw (18) extends into the interior of the movable frame (19), and the external thread of the screw (18) is adapted to the internal thread hole of the movable frame (19). An adjusting wheel (6) is rotatably mounted at the middle position of the front end of the upper horizontal plate of the adjusting frame (5). A first drive shaft (20) is rotatably mounted inside the vertical plate of the adjusting frame (5). The lower end of the first drive shaft (20) meshes with one end of the screw (18) through a helical gear. A second drive shaft (21) is rotatably mounted on both sides inside the upper horizontal plate of the adjusting frame (5). The upper end of the first drive shaft (20) meshes with one end of the second drive shaft (21) through a helical gear, and the other end of the second drive shaft (21) meshes with the shaft of the adjusting wheel (6) through a helical gear.

5. The method for processing the large-hole platform texture of a honing connecting rod according to claim 2, characterized in that: The top of the drive device (10) is fixed to the movable end of the hydraulic lifting device (4) at the front end. A transducer (11) is installed on the outside of the lower shaft of the drive device (10). An amplitude rod (12) is installed at the lower end of the transducer (11), and the amplitude rod (12) is wrapped around the output shaft of the drive device (10).

6. The method for processing the large-hole platform texture of a honing connecting rod according to claim 2, characterized in that: An electrolyte filtration device (15) is installed on one side of the electrolytic cell (1). The electrolyte filtration device (15) consists of a circulation pump and a filtration mechanism, and the connecting pipe at the outlet of the circulation pump extends into the interior of the electrolytic cell (1).

7. The method for processing the large-hole platform texture of a honing connecting rod according to claim 6, characterized in that: The flow rate of the circulating pump is adjustable between 10-30 L / min. The filtration mechanism includes coarse filtration, medium filtration and fine filtration. The coarse filtration accuracy is 100 μm, the medium filtration accuracy is 10 μm and the fine filtration accuracy is 1 μm.

8. The method for processing the large-hole platform texture of a honing connecting rod according to claim 1, characterized in that: Step two also includes setting a current monitoring device between the DC power supply and the anode to monitor current changes in real time. When the current fluctuation exceeds the set range, the DC power supply output is automatically adjusted to maintain the current density.

9. The method for processing the large-hole platform texture of a honing connecting rod according to claim 1, characterized in that: Step four also includes setting a pressure distribution monitoring device at the contact point between the honing ball and the connecting rod bore to monitor the pressure distribution in real time. When uneven pressure distribution is detected, the feed parameters of the honing equipment are adjusted.

10. The method for processing the large-hole platform texture of a honing connecting rod according to claim 1, characterized in that: In step five, the water pressure of the high-pressure water gun is adjusted between 0.5-1 MPa. The water pressure is selected for rinsing based on the amount of residual electrolyte on the connecting rod surface and the fineness of the mesh pattern.

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