Machining method for large-hole platform reticulate pattern of reaming and honing connecting rod

Abstract

The invention discloses a machining method for reamed and honed connecting rod macropore platform reticulate patterns, and relates to the technical field of connecting rod macropore treatment.The machining method comprises the steps that firstly, a to-be-machined connecting rod is placed in cleaning equipment to remove surface oil stains; 2, the pretreated connecting rod serves as an anode and is connected to the positive electrode of a direct-current power source, and the connecting rod connected with the anode is placed in an electrolytic bath; thirdly, an ultrasonic transducer is arranged on the honing mechanism, and ultrasonic vibration generated by the ultrasonic transducer and with the frequency stabilized within the range of 20 kHz to 100 kHz is superposed on the basis that the honing ball conducts conventional rotation and axial honing movement; fourthly, honing balls are driven by honing equipment to conduct conventional rotation and axial feeding so that platform reticulate patterns can be formed; and fifthly, after machining is completed, the connecting rod is taken out, washed and dried, the defects of a traditional honing method in the aspects of precision, efficiency and surface quality are overcome, and high-quality machining of connecting rod materials with various hardness is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of connecting rod large hole treatment, and specifically to a processing method for honing the platform reticulation of a connecting rod large hole. Background Art

[0002] The crank connecting rod mechanism is the main moving mechanism of an automobile engine, which consists of three parts: the engine block group, the piston connecting rod group, and the crankshaft flywheel group. As an important component of the piston connecting rod group, the connecting rod mainly functions to connect the piston and the crankshaft, transmit the force received by the piston to the crankshaft, and convert the reciprocating motion of the piston into the rotational motion of the crankshaft.

[0003] For example, in the Chinese authorized patent "A Processing Method for the Platform Reticulation of a Connecting Rod Large Hole" with the publication number CN107775520B, by using multi-axis honing with different grit honing balls and honing parameters, a surface-uniform reticulation parameter is processed, providing sufficient friction and support rate between the inner wall of the large hole and the outer wall of the bearing bush, effectively preventing the bearing bush from slipping.

[0004] The above-mentioned prior art has a large cutting force for materials with relatively high hardness, resulting in rapid tool wear, low processing efficiency, and difficulty in ensuring the accuracy and surface quality of the reticulation. At the same time, chip removal is difficult during the traditional honing process, the lubrication effect of the cutting fluid is limited, and it is easy to leave scratches and defects on the processed surface, affecting the fatigue strength and wear resistance of the connecting rod. Therefore, it does not meet the existing requirements, and for this reason, we propose a processing method for honing the platform reticulation of a connecting rod large hole. Summary of the Invention

[0005] The purpose of the present invention is to provide a processing method for honing the platform reticulation of a connecting rod large hole, so as to solve the deficiencies in accuracy, efficiency, and surface quality of the traditional honing method mentioned in the above background art, and achieve high-quality processing of connecting rod materials with various hardnesses.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A processing method for honing the platform reticulation of a connecting rod large hole, including the following steps:

[0007] Step 1. Pretreatment: Place the connecting rod to be processed in a cleaning device, add a cleaning agent, set the temperature at 40°C - 60°C, and clean for 10 - 20 minutes to remove the oil, dust, and impurities on the surface of the connecting rod. Immerse the cleaned connecting rod in a degreasing agent with a concentration of 5% - 10%, and degrease for 15 - 30 minutes at a temperature of 30°C - 50°C to deeply remove the surface oil.

[0008] Step 2. Use the pretreated connecting rod as the anode and connect it to the positive pole of a DC power supply. Place the connecting rod connected to the anode inside an electrolytic cell, debug the DC power supply, set appropriate initial parameters, and initially set the current density at the beginning of processing at 10 - 50 A / dm according to the hardness of the connecting rod material and the processing efficiency requirements 2Between them, the voltage is initially set between 5 - 20V according to the chemical properties, concentration of the electrolyte, and the connecting rod material characteristics, and it is ensured that the voltage fluctuation during the entire processing is controlled within ±0.5V;

[0009] Step Three: Set an ultrasonic transducer on the honing mechanism. On the basis of the conventional rotation and axial honing movements of the honing ball, superimpose ultrasonic vibrations with a frequency stabilized in the range of 20kHz - 100kHz generated by the ultrasonic transducer;

[0010] Step Four: Through the honing equipment, initially set the rotational speed of the honing ball between 100 - 500r / min. At the same time, initially set the axial feed speed in the range of 0.1 - 1mm / min. According to the material hardness and the current processing stage, initially set the pressure of the honing ball between 0.5 - 3MPa, and control the pressure fluctuation within ±0.05MPa. Finally, the honing equipment starts to drive the honing ball to perform conventional rotation and axial feed to form the platform texture;

[0011] Step Five: After the processing is completed, take out the connecting rod, wash the connecting rod with a high-pressure water gun, and then put the connecting rod into a hot air drying oven to completely dry the surface of the connecting rod.

[0012] Preferably, it is realized based on the honing equipment, including an electrolytic cell. Both sides of the upper end of the electrolytic cell are fixedly welded with side support plates. The upper ends of the two side support plates are provided with a top plate. Hydraulic lifting devices are fixedly installed on the front and back of the upper end surface of the top plate. A connecting rod positioning mechanism is arranged at the rear side of the lower end of the top plate, and a connecting rod honing mechanism is arranged at 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 connecting rod positioning mechanism includes an adjusting frame, and the upper end surface of the adjusting frame is fixed to the movable end of the rear hydraulic lifting device. Clamping frames are fixedly arranged on the inner sides of the vertical plates of the adjusting frame. A movable frame is movably installed inside the clamping frames. A clamping plate is installed inside the movable frame. The clamping plate is used to fix the rod body part of the connecting rod, and an anode plate is installed on the inner wall of the clamping plate.

[0014] Preferably, a screw rod is rotatably installed inside the clamping frame. The screw rod extends into the inside of the movable frame, and the external thread of the screw rod is adapted to the internal thread hole of the movable frame. An adjusting wheel is rotatably installed at the middle position of the front end of the upper cross plate of the adjusting frame. First transmission shafts are rotatably installed inside the vertical plates of the adjusting frame. The lower end of the first transmission shaft is meshed with one end of the screw rod through a bevel gear. Second transmission shafts are rotatably installed on both sides inside the upper cross plate of the adjusting frame. The upper end of the first transmission shaft is meshed with one end of the second transmission shaft through a bevel gear, and the other end of the second transmission shaft is meshed with the shaft of the adjusting wheel through a bevel gear.

[0015] Preferably, the connecting rod honing mechanism includes a driving device, and the top of the driving device is fixed to the movable end of the hydraulic lifting device at the front end. A transducer is installed outside the lower end shaft of the driving device, and a horn is installed at the lower end of the transducer, and the horn is wrapped around the output shaft of the driving device. A honing spindle is installed at the bottom of the output shaft of the driving device, and a plurality of annularly distributed elastic rods are fixedly arranged outside the honing spindle, and honing balls are fixedly arranged at the outer ends of the elastic rods.

[0016] Preferably, an electrolyte filtering device is installed on one side of the electrolytic cell. The inside of the electrolyte filtering device consists of a circulating pump and a filtering mechanism, and the connecting pipe at the liquid outlet end of the circulating pump extends into the electrolytic cell.

[0017] Preferably, the flow rate of the circulating pump is adjusted between 10 - 30 L / min. The filtering 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.

[0018] Preferably, in step two, a current monitoring device is further included 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 output of the DC power supply is automatically adjusted to maintain the current density.

[0019] Preferably, in step four, a pressure distribution monitoring device is further included at the contact part between the honing ball and the large hole of the connecting rod to monitor the pressure distribution in real time. When it is found that the pressure distribution is uneven, 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, and a suitable water pressure is selected for flushing according to the amount of residual electrolyte on the surface of the connecting rod and the fineness of the reticulation.

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

[0022] 1. By adopting ultrasonic-assisted honing in the present invention, an ultrasonic transducer is installed on the honing ball, so that when the honing ball performs conventional honing motions such as rotation and axial feed, ultrasonic vibrations with a frequency of 20 kHz - 100 kHz are superimposed. The ultrasonic vibrations reduce the cutting force, making the honing process more stable and reducing tool wear. Its cavitation effect promotes the formation of microbubbles in the cutting fluid. When the bubbles burst, local high pressure and high temperature are generated, enhancing the penetration ability of the cutting fluid, improving the cooling and lubrication effects, and helping the chips to be discharged smoothly. Thereby, it is beneficial to construct a uniform and clear high-quality reticulation, effectively reducing the phenomenon of sticking to the tool and improving the surface finish of the reticulation.

[0023] 2. In the present invention, electrochemical-assisted honing is adopted. The connecting rod to be processed is used as the anode and placed together in the electrolyte. Under the action of a DC electric field, the metal atoms on the surface of the large hole of the connecting rod lose electrons and undergo electrochemical dissolution, thereby reducing the material hardness and facilitating subsequent honing processing. By controlling the values of the current density in the initial processing stage and the reticulation forming stage, the material removal amount can be accurately regulated, and the precise control of the reticulation depth, width, and shape can be achieved. For high-hardness alloy steel connecting rods, the material hardness is first reduced by electrochemical dissolution, which can significantly improve the honing efficiency and reticulation accuracy.

[0024] 3. The ultrasonic-assisted honing and electrochemical-assisted honing of the present invention can cooperate 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. At the same time, electrochemical dissolution reduces the material hardness and further reduces the cutting force required during ultrasonic-assisted honing. The two promote each other and improve the overall processing performance. During the processing, ultrasonic vibration enables the charged ions in the electrolyte to reach the anode surface faster, enhancing the electrochemical dissolution effect, and the soft material after electrochemical dissolution is more easily removed by honing under ultrasonic assistance to form an accurate reticulation structure. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0029] Figure 5 is of the present invention Figure 4 cross-sectional view taken along line A-A in.

[0030] In the figure: 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. driving device; 11. transducer; 12. amplitude transformer; 13. anode plate; 14. cathode plate; 15. electrolyte filtering device; 16. elastic rod; 17. honing ball; 18. screw; 19. movable frame; 20. first transmission shaft; 21. second transmission shaft. DETAILED DESCRIPTION OF THE INVENTION

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0032] Please refer to Figures 1-5 , an embodiment provided by the present invention: a processing method for the platform reticulation of the large hole of a hinge honing connecting rod, comprising the following steps:

[0033] Step 1. Pretreatment: Place the connecting rod to be processed in a cleaning device, add a cleaning agent, set the temperature at 40°C - 60°C, and clean for 10 - 20 minutes to remove the oil stains, dust and impurities on the surface of the connecting rod. Immerse the cleaned connecting rod in a degreasing agent with a concentration of 5% - 10%, and degrease at a temperature of 30°C - 50°C for 15 - 30 minutes to deeply remove the surface oil stains;

[0034] Step 2. Take the pretreated connecting rod as the anode and connect it to the positive pole of a DC power supply. Place the connecting rod connected to the anode inside an electrolytic cell, debug the DC power supply, set appropriate initial parameters, and initially set the current density at the initial stage of processing between 10 - 50 A / dm 2 according to the hardness of the connecting rod material and the processing efficiency requirements. The voltage is initially set between 5 - 20 V according to the chemical properties, concentration of the electrolyte and the characteristics of the connecting rod material, and ensure that the voltage fluctuation is controlled within ±0.5 V during the whole processing process. Set a current monitoring device between the DC power supply and the anode to monitor the current change in real time. When the current fluctuation exceeds the set range, automatically adjust the output of the DC power supply to maintain the current density;

[0035] Step 3. Set an ultrasonic transducer on the honing mechanism. On the basis of the conventional rotary and axial honing movements of the honing ball, superimpose ultrasonic vibrations with a frequency stabilized in the range of 20 kHz - 100 kHz generated by the ultrasonic transducer;

[0036] Step 4. Through the honing equipment, initially set the rotational speed of the honing ball between 100 - 500 r / min, and at the same time initially set the axial feed speed in the range of 0.1 - 1 mm / min. According to the material hardness and the current processing stage, initially set the pressure of the honing ball between 0.5 - 3 MPa, and control the pressure fluctuation within ±0.05 MPa. Finally, the honing equipment starts to drive the honing ball to perform conventional rotation and axial feed to form the platform reticulation. Set a pressure distribution monitoring device at the contact part between the honing ball and the large hole of the connecting rod to monitor the pressure distribution in real time. When it is found that the pressure distribution is uneven, adjust the feed parameters of the honing equipment;

[0037] Step 5: After processing is completed, take out the connecting rod and wash it with a high-pressure water gun. Then, place the connecting rod in a hot air drying oven to completely dry the surface of the connecting rod. The water pressure of the high-pressure water gun can be adjusted between 0.5 - 1 MPa. Select an appropriate water pressure for flushing according to the amount of residual electrolyte on the surface of the connecting rod and the fineness of the mesh pattern.

[0038] Ultrasonic-assisted honing and electrochemical-assisted honing can cooperate 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. At the same time, electrochemical dissolution reduces the material hardness, further reducing the cutting force required during ultrasonic-assisted honing. The two promote each other, improving the overall processing performance. During the processing, ultrasonic vibration enables the charged ions in the electrolyte to reach the anode surface faster, enhancing the electrochemical dissolution effect. The soft material after electrochemical dissolution is more easily removed by honing under ultrasonic assistance, forming an accurate mesh pattern.

[0039] Please refer to Figure 1 , which is implemented based on a honing device and includes an electrolytic cell 1. Both sides of the upper end of the electrolytic cell 1 are welded and fixed with side support plates 2. A top plate 3 is installed at the upper ends of the two side support plates 2. Hydraulic lifting devices 4 are fixedly installed at the front and back of the upper end surface of the top plate 3 by bolts. A connecting rod positioning mechanism is provided at the rear side of the lower end of the top plate 3, and a connecting rod honing mechanism is provided at 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 refer to Figure 1 、 Figure 2 and Figure 3 , the connecting rod positioning mechanism includes an adjusting frame 5, and the upper end surface of the adjusting frame 5 is fixed to the movable end of the rear hydraulic lifting device 4. Clamping frames 7 are fixedly arranged on the inner sides of the vertical plates of the adjusting frame 5. A movable frame 19 is movably installed inside the clamping frame 7. A clamping plate 8 is installed inside the movable frame 19. The clamping plate 8 is used to fix the rod part of the connecting rod. An anode plate 13 is installed on the inner wall of the clamping plate 8. A screw rod 18 is rotatably installed inside the clamping frame 7. The screw rod 18 extends into the inside of the movable frame 19, and the external thread of the screw rod 18 is adapted to the internal thread hole of the movable frame 19. An adjusting wheel 6 is rotatably installed at the middle position of the front end of the upper cross plate of the adjusting frame 5. First transmission shafts 20 are rotatably installed inside the vertical plates of the adjusting frame 5. The lower end of the first transmission shaft 20 is meshed with one end of the screw rod 18 through a bevel gear. Second transmission shafts 21 are rotatably installed on both sides inside the upper cross plate of the adjusting frame 5. The upper end of the first transmission shaft 20 is meshed with one end of the second transmission shaft 21 through a bevel gear, and the other end of the second transmission shaft 21 is meshed with the shaft of the adjusting wheel 6 through a bevel gear;

[0041] By rotating the adjusting wheel 6, under the meshing action of the helical gears, the first transmission shaft 20 is driven to rotate by the second transmission shaft 21, and the screw rod 18 is driven to rotate by the first transmission shaft 20. Under the frictional action between the screw rod 18 and the internal thread hole of the movable frame 19, and in cooperation 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 rod part of the connecting rod until clamping is achieved, providing stable clamping for subsequent honing processing.

[0042] Please refer to Figure 2 and Figure 5 , the connecting rod honing mechanism includes a driving device 10, and the top end of the driving device 10 is fixed to the movable end of the front hydraulic lifting device 4. A transducer 11 is installed outside the lower end shaft of the driving device 10, and a horn 12 is installed at the lower end of the transducer 11, and the horn 12 is wrapped around the output shaft of the driving device 10. A honing spindle is installed at the bottom of the output shaft of the driving device 10, and a plurality of annularly distributed elastic rods 16 are fixedly arranged outside the honing spindle, and honing balls 17 are fixedly arranged at the outer ends of the elastic rods 16.

[0043] Please refer to Figure 1 , an electrolyte filtering device 15 is installed on one side of the electrolytic cell 1. The inside of the electrolyte filtering device 15 is composed of a circulation pump and a filtering mechanism, and the connecting pipe at the liquid outlet end of the circulation pump extends into the inside of the electrolytic cell 1. The flow rate of the circulation pump is adjusted between 10 - 30 L / min. The filtering mechanism includes coarse filtration, medium filtration, and fine filtration. The filtering accuracy of the coarse filtration is 100 μm, the filtering accuracy of the medium filtration is 10 μm, and the filtering accuracy of the fine filtration is 1 μm, ensuring electrolyte circulation and cleanliness, and the impurity content of the filtered electrolyte is less than 10 ppm.

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

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

[0046] Process Parameter Setting: The ultrasonic frequency is set to 30 kHz, and the amplitude is 10 μm; the current density is initially set to 15 A / dm 2 , and it drops to 8 A / dm 2 during the reticulation forming stage, the voltage is 10 V; the rotational speed of the honing head is 250 r / min, the axial feed speed is 0.5 mm / min, the pressure of the honing head is initially 1.5 MPa, and it drops to 0.8 MPa during the forming stage.

[0047] Processing process: Operate according to the processing flow, and monitor various parameters in real time during the processing. After inspection, the depth accuracy of the reticulate pattern on the large-hole platform of the machined aluminum alloy connecting rod reaches ±0.005 mm, the width accuracy reaches ±0.01 mm, and the surface roughness Ra is 0.2 μm, fully meeting the design requirements. The processing efficiency is increased by 40% compared with traditional honing.

[0048] Example 2: Processing of alloy steel connecting rod

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

[0050] Process parameter setting: The ultrasonic frequency is increased to 80 kHz, and the amplitude is 20 microns; the current density is initially set at 40 A / dm 2 , and it is reduced to 12 A / dm in the reticulate pattern forming stage 2 , the voltage is 15 V; the rotational speed of the honing head is 200 r / min, the axial feed speed is 0.3 mm / min, the pressure of the honing head is initially 2.5 MPa, and it is reduced to 1 MPa in the forming stage.

[0051] Processing process: Strictly execute according to the processing flow, and inspect the machined alloy steel connecting rod. The results show that the depth accuracy of the reticulate pattern reaches ±0.006 mm, the width accuracy reaches ±0.012 mm, the surface roughness Ra is 0.25 μm, and the processing efficiency is increased by 35%, proving that the technical solution of the present invention also has good effects on the processing of alloy steel connecting rods.

[0052] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A method for processing a large-hole platform reticulation of a hinged connecting rod, characterized in that: The following steps are involved: Step 1: Pretreatment: Place the connecting rod to be processed in the cleaning equipment, add the cleaning agent, set the temperature at 40℃-60℃, clean for 10-20 minutes, remove the oil, dust and impurities on the surface of the connecting rod, immerse the cleaned connecting rod in a degreasing agent with a concentration of 5%-10%, degrease at a temperature of 30℃-50℃ for 15-30 minutes, and deeply remove the surface oil; Step 2: The pretreated connecting rod is used as the anode and connected to the positive pole of the DC power supply. The connecting rod connected to the anode is placed inside the electrolytic cell, the DC power supply is debugged, and the initial parameters are set. According to the hardness of the connecting rod material and the processing efficiency requirements, the current density at the initial stage of processing is initially set to 10-50A / dm 2 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, and the voltage fluctuation is controlled within ±0.5V during the entire processing process; Step 3: An ultrasonic transducer is arranged on the honing mechanism, and the honing ball performs conventional rotation and axial honing motion, and superimposes ultrasonic vibration with a stable frequency in the range of 20kHz-100kHz generated by the ultrasonic transducer; Step 4: Use the honing equipment to preliminarily set the honing ball speed to between 100-500r / min, and the axial feed speed to between 0.1-1mm / min. According to the material hardness and the current processing stage, the honing ball pressure is preliminarily set to between 0.5-3MPa, and the pressure fluctuation is controlled within ±0.05MPa. Finally, the honing equipment starts to drive the honing ball to perform conventional rotation and axial feed to form the platform reticulation. Step 5. After processing, take out the connecting rod, flush it with a high-pressure water gun, and then put the connecting rod into a hot air drying oven to completely dry the surface of the connecting rod.

2. According to claim 1, a method for processing a large-hole platform reticulation of a hinged honing connecting rod is implemented based on a honing device, and is characterized in that: The invention comprises an electrolytic cell (1), wherein side support plates (2) are welded and fixed on both sides of the upper end of the electrolytic cell (1), a top plate (3) is installed on the upper ends of the two side support plates (2), a hydraulic lifting device (4) is fixedly installed on the front and rear of the upper end 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), and a cathode plate (14) is installed on one side of the inner cavity of the electrolytic cell (1).

3. The method for processing the large-hole platform reticulation of a hinged connecting rod according to claim 2, characterized in that: The connecting rod positioning mechanism comprises an adjusting frame (5), and the upper end surface of the adjusting frame (5) is fixed to the movable end of the hydraulic lifting device (4) at the rear side, a clamping frame (7) is fixedly arranged on the inner side of the vertical plate 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 connecting rod, and an anode plate (13) is installed on the inner wall of the clamping plate (8).

4. The method for processing the large-hole platform reticulation of a hinged connecting rod according to claim 3, characterized in that: A screw rod (18) is rotatably mounted inside the clamping frame (7), the screw rod (18) extends into the interior of the movable frame (19), and the external thread of the screw rod (18) is matched with 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 transmission shaft (20) is rotatably mounted inside the vertical plate of the adjusting frame (5), the lower end of the first transmission shaft (20) is meshed with one end of the screw rod (18) through a bevel gear; second transmission shafts (21) are rotatably mounted on both sides of the interior of the upper horizontal plate of the adjusting frame (5), the upper end of the first transmission shaft (20) is meshed with one end of the second transmission shaft (21) through a bevel gear, and the other end of the second transmission shaft (21) is meshed with the shaft of the adjusting wheel (6) through a bevel gear.

5. The method for processing the large-hole platform reticulation of a hinged connecting rod according to claim 2, characterized in that: The connecting rod honing mechanism comprises a driving device (10), and the top end of the driving 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 end shaft of the driving device (10), a variable amplitude rod (12) is installed on the lower end of the transducer (11), and the variable amplitude rod (12) is wrapped around the output shaft of the driving device (10), a honing spindle is installed on the bottom of the output shaft of the driving device (10), and a plurality of groups 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).

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

7. A method for processing a large-hole platform reticulation of a hinged connecting rod according to claim 6, characterized in that: The flow rate of the circulation pump is adjusted between 10-30 L / min, and the filtering 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.

8. The method for processing the large-hole platform reticulation of a hinged-honed connecting rod according to claim 1, characterized in that: In step 2, a current monitoring device is also provided 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.

9. The method for processing the large-hole platform reticulation of a hinge-honed connecting rod according to claim 1, characterized in that: In step four, a pressure distribution monitoring device is also provided at the contact position between the honing ball and the large hole of the connecting rod to monitor the pressure distribution in real time. When uneven pressure distribution is found, the feed parameters of the honing equipment are adjusted.

10. The method for processing the large-hole platform reticulation of a hinged 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, and the water pressure is selected for flushing according to the amount of residual electrolyte on the surface of the connecting rod and the fineness of the mesh.

Images