Machining process of cylinder sleeve column

Abstract

The invention relates to the technical field of machining, and discloses a machining process of a cylinder sleeve column, which comprises the following steps: S1, firstly selecting a proper bar material, S2, carrying out deep hole machining on a water-cooled core and a guide column by utilizing deep hole drilling equipment and cooling, S3, pre-machining a joint part of the water-cooled core and the guide column, S4, welding the joint part of the water-cooled core and the guide column, and S5, welding the joint part of the water-cooled core and the guide column. The method comprises the steps of S1, machining a cylinder sleeve column, S2, machining the cylinder sleeve column, S5, carrying out multi-section heat treatment on the cylinder sleeve column, S6, combining an AI monitoring system in the process, S7, carrying out surface optimization treatment on the machined cylinder sleeve column, S8, carrying out a hydrostatic test to detect the sealing performance and the pressure resistance of the cylinder sleeve column, and S9, carrying out comprehensive inspection on the cylinder sleeve column, and detecting the precision of all sizes by using a three-coordinate measuring instrument. The high-precision three-coordinate measuring instrument is adopted for size detection, accurate measurement of the key size and tolerance of the product is achieved, and the effects that it is ensured that the product meets the design specification, and the size error is extremely small are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of machining, and specifically to a processing technology for cylinder sleeve columns. Background Art

[0002] With the continuous improvement of the accuracy requirements for industrial products, the control of product dimensions and tolerances has become particularly important in the production process. Traditional dimensional inspection methods usually rely on manual measuring tools or two-dimensional measuring equipment. These methods often cannot meet the requirements of high precision and high efficiency, and are easily restricted by human factors and the equipment itself. Manual inspection not only takes a long time, but also has large fluctuations in repeatability and accuracy, making it difficult to ensure that the dimensions of each product in the mass production process meet the design requirements. In addition, with the complexity of product design and the improvement of quality requirements, simply relying on traditional inspection means can no longer meet the requirements of accuracy and reliability. Especially in the control of micron-level or nanometer-level dimensions, traditional inspection means expose problems such as insufficient accuracy and low efficiency.

[0003] In the prior art, many enterprises still adopt traditional two-dimensional measurement methods or relatively low-precision three-dimensional measurement equipment, which cannot achieve comprehensive and high-precision measurement of complex parts. Traditional manual measurement methods have disadvantages such as operation instability, operation errors, and low efficiency, and the monitoring of products during the production process is relatively weak, which easily leads to inconsistent product quality between batches, thereby affecting the overall production efficiency and the market competitiveness of products. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a processing technology for cylinder sleeve columns, which solves the problems that manual measurement and low-precision instruments in the prior art are difficult to ensure accurate measurement of micron-level or even nanometer-level dimensions, especially in complex parts or products with high-precision requirements, where large errors are likely to occur, and manual adjustment and calibration are required for each measurement, unable to meet the needs of mass production and efficient detection.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A processing technology for cylinder sleeve columns includes the following steps: S1. First, select a suitable bar stock, select the material according to the size requirements of the water-cooled core and the guide post, then perform processing, conduct flaw detection on the material after cutting, and then use a turning tool to perform rough turning of the outer shape and inner hole processing; S2. Subsequently, use deep hole drilling equipment to perform deep hole processing of the water-cooled core and the guide post and perform cooling. Then, use a milling machine to process the water inlet and outlet holes to ensure the accuracy of the holes. At the same time, perform surface treatment on the hole edges to reduce burrs and improve the durability of the holes; S3. Next, preprocess the interface between the water-cooled core and the guide pillar. When using threaded connection, use a precision fitting locking device to improve the connection strength, and tighten it after assembly. S4. Then, weld the connection part between the water-cooled core and the guide pillar, and perform flaw detection after welding. After welding, perform low-temperature uniform tempering treatment to reduce the residual stress in the welding area. S5. Next, perform multi-stage heat treatment on the cylinder sleeve column. Utilize local induction hardening technology to improve the hardness and wear resistance of key parts, and simultaneously perform nitriding diffusion treatment on the surface. S6. Subsequently, perform precision machining. During this process, combine an AI monitoring system and use a five-axis machining center to machine the special-shaped holes to improve the dimensional accuracy and machining quality of the special-shaped parts. S7. Then, perform surface optimization treatment on the machined cylinder sleeve column, then perform ultra-precision polishing on the key parts, and adopt intelligent adaptive polishing technology to optimize the surface finish. S8. Subsequently, perform a hydrostatic test to detect the sealing performance and pressure resistance of the cylinder sleeve column, conduct a comprehensive sealing test. After the test is completed, the product meets the standard sealing requirements, and record the test results. S9. Finally, conduct a comprehensive inspection of the cylinder sleeve column. Use a coordinate measuring machine to detect the accuracy of all dimensions. Package the qualified products finally and attach a quality report, and prepare for shipment. For unqualified products, rework or repair will be carried out.

[0006] Preferably, in S1, the machining method adopts precision sawing and reserves a machining allowance of 3 mm in the length direction. The flaw detection adopts ultrasonic flaw detection. The internal hole machining is used to make the outer shape size and the coaxiality of the internal hole meet the design requirements. The ultrasonic flaw detection is used to detect internal defects.

[0007] Preferably, in S2, the cooling method adopts high-pressure internal cooling oil-based cutting fluid for cooling. The cooling is used to avoid affecting the shape of the hole due to thermal deformation. The deep hole drilling equipment includes a gun drill and a single-tube internal chip removal deep hole drill.

[0008] Preferably, in S3, the preprocessing adopts double-layer high-temperature sealant plus a metal sealing ring for sealing, with a temperature resistance ≥ 350 °C. The precision fitting locking device includes a lock washer, an elastic washer, a lock nut or a locking mechanism.

[0009] Preferably, in S4, the welding is performed by full-circle laser melting welding technology to increase the strength of the interface and reduce thermal deformation. The post-welding flaw detection adopts X-ray flaw detection and ultrasonic flaw detection to ensure that the weld is defect-free. The low-temperature uniform tempering treatment includes a heating stage, a heat preservation stage and a cooling stage. The heating rate in the heating stage is 50-100°C / h, the heat preservation time in the heat preservation stage is 1-2 hours, and the cooling stage adopts air cooling or natural cooling.

[0010] Preferably, in S5, the multi-stage heat treatment includes quenching and tempering, and the quenching and tempering are used to improve its strength, wear resistance and temperature adaptability. The local induction strengthening technology includes an induction coil, electric heating, and a cooling system. The key parts include the inner wall contacted by the piston ring, the sealing part, and the transition area subjected to greater stress. The nitriding diffusion treatment includes a nitriding medium, a nitriding temperature, a nitriding time, and a diffusion process, and the nitriding diffusion treatment is used to improve corrosion resistance and durability.

[0011] Preferably, in S6, the precision machining is performed using a CNC lathe, and the precision machining is used to ensure that the accuracy of the size and shape of each part meets the design standards. The AI ​​monitoring system is used to adjust the machining error by real-time monitoring of cutting force and vibration parameters.

[0012] Preferably, in S7, the surface optimization treatment includes ABP shot peening and nitriding treatment, the surface optimization treatment is used to enhance its wear resistance and corrosion resistance, the shot peening time of the ABP shot peening and the nitriding time of the nitriding are 1-2 hours, and the intelligent adaptive polishing technology optimizes the finish by feedback controlling the polishing pressure and speed.

[0013] Preferably, in S8, the water pressure test pressure is 0.8MPa, the pressure holding time is 1-2 hours, the pressure rise rate during the water pressure test is controlled at 0.1-0.2MPa / min, and the comprehensive sealing test uses a helium mass spectrometer leak detector with a leak detection accuracy of 1×10⁻ 6 Pa・m³ / s.

[0014] Preferably, in S9, the inspection includes whether the size, appearance and performance of the product meet the design requirements, the measurement accuracy of the three-coordinate measuring machine is ±0.005mm, and the quality report includes various performance indicators of the product and the results of the three-coordinate measuring machine inspection.

[0015] The present invention provides a processing technology for a cylinder sleeve column, which has the following beneficial effects: 1. The present invention uses a high-precision three-dimensional coordinate measuring instrument to perform dimensional detection, thereby achieving accurate measurement of key dimensions and tolerances of products, thereby ensuring that the products meet design specifications and have extremely small dimensional errors.

[0016] 2. By combining optical detection and manual inspection, the present invention realizes comprehensive quality monitoring of the product appearance, effectively removes surface defects such as scratches and pits, and ensures that the product appearance meets high-standard requirements.

[0017] 3. By introducing multiple performance test methods, the present invention realizes function verification of the product under various application environments, and ensures that the product operates stably, reliably and efficiently in actual use.

[0018] 4. By recording various test data in detail and forming a quality report, the present invention realizes comprehensive traceability and transparency of product quality, and effectively enhances product compliance and user trust. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a process flow chart of a processing technology for a cylinder liner column of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0021] Please refer to the attached Figure 1 , the embodiment of the present invention provides a processing technology for a cylinder liner column, including the following steps: S1. First, select a suitable bar stock, select materials according to the size requirements of the water-cooled core and the guide post, then process, perform flaw detection on the material after cutting, and then use a turning tool to perform rough turning of the outer shape and inner hole processing; S2. Subsequently, use a deep hole drilling device to perform deep hole processing on the water-cooled core and the guide post and cool it. Then, use a milling machine to process the water inlet and outlet holes to ensure the accuracy of the holes. At the same time, perform surface treatment on the hole edges to reduce burrs and improve the durability of the holes; S3. Next, preprocess the interface part of the water-cooled core and the guide post. When connecting with threads, use a precision fitting locking device to improve the connection strength, and tighten it after assembly; S4. Then, weld the connection part of the water-cooled core and the guide post, perform flaw detection after welding, and perform low-temperature uniform tempering treatment after welding to reduce the residual stress in the welding area; S5. Then, perform multi-stage heat treatment on the cylinder liner column, use local induction hardening technology to improve the hardness and wear resistance of key parts, and perform nitriding diffusion treatment on the surface at the same time; S6. Subsequently, precision machining is carried out. During this process, an AI monitoring system is incorporated, and a five-axis machining center is used to machine the irregular holes to improve the dimensional accuracy and machining quality of the irregular parts. S7. Then, the surface of the machined cylinder liner column is optimized, and then the key parts are super-finished polished, and the intelligent adaptive polishing technology is adopted to optimize the surface finish. S8. Subsequently, a hydrostatic test is carried out to detect the sealing performance and pressure resistance of the cylinder liner column. A comprehensive sealing test is conducted. After the test is completed, the product meets the standard sealing requirements, and the test results are recorded. S9. Finally, a comprehensive inspection of the cylinder liner column is carried out. A coordinate measuring machine is used to detect the accuracy of all dimensions. The qualified products are finally packaged and accompanied by a quality report for shipment preparation. For unqualified products, reprocessing or rework will be carried out.

[0022] In S1, the machining method adopts precision sawing and a machining allowance of 3 mm is reserved in the length direction. The flaw detection is carried out by ultrasonic flaw detection. The inner hole machining is used to make the outer shape dimension and the coaxiality of the inner hole meet the design requirements, and the ultrasonic flaw detection is used to detect internal defects.

[0023] Specifically, first, a bar stock meeting the material requirements is selected and cut by precision sawing, and a machining allowance of 3 mm is reserved in the length direction to ensure that the surface roughness can be removed and deformation can be avoided during subsequent machining. After sawing, ultrasonic flaw detection is immediately carried out to identify potential defects inside the material, such as micro-cracks or pores, so as to ensure that the material quality meets the requirements. Next, inner hole machining is carried out to ensure that the outer shape dimension and the coaxiality of the inner hole meet the design standards. Inner hole machining is usually completed by a CNC lathe to accurately control the hole diameter and coaxiality, ensure the accuracy of the inner and outer shapes, and control the error within 0.01 mm. This stage ensures the accuracy of subsequent machining and assembly, as well as the sealing performance and stability of the product. Through precision inner hole machining, the high-precision requirements of the entire cylinder liner column are ensured, and the product is ensured to have good mechanical properties and assembly adaptability.

[0024] In S2, the cooling method adopts high-pressure internal cooling oil-based cutting fluid for cooling. Cooling is used to avoid affecting the shape of the hole due to thermal deformation. Deep hole drilling equipment includes gun drills and single-tube internal chip removal deep hole drills.

[0025] Specifically, the cooling method aims to effectively avoid the thermal deformation of the hole caused by the high temperature during the cutting process and ensure the shape and dimensional accuracy of the hole during the machining process. The high-pressure internal cooling oil-based cutting fluid can not only timely remove the heat in the cutting area, but also reduce the friction during the cutting process, extend the tool life and improve the machining efficiency. In deep hole drilling, deep hole drilling equipment such as gun drills and single-tube internal chip removal deep hole drills are used. Gun drills can provide better stability and cutting efficiency in the processing of deeper holes, ensuring that the straightness and roundness of the holes meet the requirements. The single-tube internal chip removal deep hole drill effectively removes chips through an internal chip removal system, reduces blockage in the cutting area, ensures the continuous cutting force of the tool during the processing, and improves the processing quality. The precise control of this equipment ensures the accuracy of deep hole processing and avoids errors in hole diameter and hole shape deformation.

[0026] In S3, for pre-processing, a double-layer high-temperature sealant and a metal sealing ring are used for sealing, with a temperature resistance of ≥350°C. The precision fitting locking device includes a lock washer, an elastic washer, a locking nut, or a locking mechanism.

[0027] Specifically, the high-temperature sealant has the characteristic of a temperature resistance of ≥350°C, which can ensure the sealing effect in a high-temperature environment and prevent sealing failure caused by temperature rise. The metal sealing ring provides additional mechanical strength during the sealing process, enhances the sealing performance of the connection, and ensures reliability under high pressure and high temperature; In addition, to ensure the connection strength between the water-cooled core and the guide post, a precision fitting locking device is adopted. This locking device includes various accessories such as a lock washer, an elastic washer, a locking nut, or a locking mechanism. Through precise assembly and fitting, it can effectively prevent loosening in a vibrating and high-temperature working environment. The lock washer and the elastic washer provide additional friction and elastic compensation, while the locking nut or the locking mechanism fixes the connection mechanically, ensuring the long-term stability and sealing performance of the connection part. This technical solution effectively improves the high-temperature resistance and vibration resistance of the connection part, ensuring the long-term reliable operation of the water-cooled core and the guide post.

[0028] In S4, welding is carried out using a full-circumference laser cladding welding technique to increase the strength of the interface and reduce thermal deformation. After welding, flaw detection is carried out using X-ray flaw detection and ultrasonic flaw detection to ensure that the weld seam is defect-free. The low-temperature uniform tempering treatment includes a heating stage, an insulation stage, and a cooling stage. The heating rate in the heating stage is 50 - 100°C / h, the insulation time in the insulation stage is 1 - 2 hours, and the cooling stage uses air cooling or natural cooling.

[0029] Specifically, the welding is carried out using full-circle laser fusion welding technology. This technology can ensure the uniformity of the welding area, effectively increase the strength of the interface, and at the same time reduce thermal deformation during welding, avoiding the degradation of material properties due to changes in the heat-affected zone. The high energy density and precise control capabilities of laser fusion welding make the weld quality higher and the deformation smaller, ensuring the close connection between the water-cooled core and the guide column. After the welding is completed, in order to ensure that the weld is defect-free, X-ray flaw detection and ultrasonic flaw detection are used for inspection. X-ray flaw detection can clearly detect defects inside the weld, such as pores, slag inclusions or cracks, while ultrasonic flaw detection can further identify the structural integrity of the welding area to ensure that the density and strength of the weld meet the design requirements; Post-weld treatment uses low-temperature uniform tempering to eliminate residual stress generated during welding and enhance the stability of the welding area. The tempering treatment includes three stages: Heating stage: slowly increase the temperature at a rate of 50-100℃ / h to prevent new stress or material embrittlement due to excessive temperature difference; Insulation stage: Maintain the target temperature for 1-2 hours to fully stabilize the metallographic structure of the welding area, reduce residual stress, and improve the comprehensive performance of the material; Cooling stage: Use air cooling or natural cooling to ensure uniform cooling and prevent new internal stress or cracks in the material due to rapid cooling. The combination of welding and post-processing processes ensures the strength, stability and durability of the welded parts, and ensures the long-term reliable operation of the water-cooled core and guide column in high temperature and high pressure environments.

[0030] S5's multi-stage heat treatment includes quenching and tempering. Quenching and tempering are used to improve its strength, wear resistance and temperature adaptability. Local induction strengthening technology includes induction coils, electric heating, and cooling systems. Key parts include the inner wall contacted by the piston ring, sealing parts, and transition areas that are subject to greater stress. Nitriding diffusion treatment includes nitriding medium, nitriding temperature, nitriding time, and diffusion process. Nitriding diffusion treatment is used to improve corrosion resistance and durability.

[0031] Specifically, in order to improve the strength, wear resistance and temperature adaptability of the cylinder liner, a multi-stage heat treatment process is adopted, including quenching and tempering. Quenching makes the material obtain high hardness through rapid cooling and improves its wear resistance; tempering reduces the brittleness after quenching through appropriate heating and slow cooling, improves the toughness and overall stability of the material, and makes it more adaptable to high temperature and high pressure conditions; In addition, in order to enhance the local performance of key parts, local induction strengthening technology is adopted. This technology uses induction coils, electric heating and cooling systems to quickly heat local areas to the set temperature in a short time and quickly cool them to enhance the surface performance of the material. The strengthened parts mainly include the inner wall contacted by the piston ring, the sealing part and the transition area under greater stress to improve its wear resistance and fatigue strength and extend its service life. In order to enhance the corrosion resistance and durability, nitriding diffusion treatment is carried out. This treatment includes selecting a suitable nitriding medium and performing diffusion treatment at a set nitriding temperature for a certain period of time, so that nitrogen atoms penetrate into the surface of the material to form a high-hardness nitriding layer. The nitriding diffusion layer can not only improve the surface hardness and wear resistance, but also enhance the material's oxidation resistance and corrosion resistance, ensuring the long-term stability of the cylinder liner column under harsh working conditions. Through this series of heat treatment and surface strengthening measures, the cylinder liner column has excellent mechanical properties and reliable durability.

[0032] S6 uses CNC lathes for medium and precision machining. Precision machining is used to ensure that the accuracy of size and shape of each part meets the design standards. The AI ​​monitoring system is used to adjust machining errors by real-time monitoring of cutting force and vibration parameters.

[0033] Specifically, precision machining is performed using CNC lathes to ensure that the size and shape accuracy of each part meets the design standards. CNC lathes precisely control the cutting process to ensure that each processing step is carried out strictly in accordance with the design drawings, thereby ensuring high precision and consistency of the product; In order to further improve the processing accuracy during the processing, the AI ​​monitoring system is combined for real-time monitoring. The system can adjust the errors in the processing process in real time by monitoring parameters such as cutting force and vibration. The AI ​​system can analyze the data fluctuations during processing and automatically adjust the cutting conditions, such as feed speed and cutting depth, to avoid quality problems caused by processing errors or equipment failures. Through the application of this system, the stability of the processing process and the quality of the final product can be significantly improved, thereby ensuring that the various technical requirements of the cylinder liner column are strictly met.

[0034] S7 surface optimization treatment includes ABP shot peening and nitriding. The surface optimization treatment is used to enhance its wear resistance and corrosion resistance. The shot peening time of ABP shot peening and nitriding time is 1-2 hours. Intelligent adaptive polishing technology optimizes the finish by feedback controlling the polishing pressure and speed.

[0035] Specifically, the surface optimization treatment includes ABP shot peening and nitrooxidation treatment. The ABP shot peening acts on the surface through a high-strength shot peening medium, forming a compressive stress layer on the surface, thereby effectively improving the wear resistance of the material. The nitrooxidation treatment forms a dense oxide layer on the surface, enhancing its corrosion resistance and high-temperature resistance. The shot peening time of the ABP shot peening is 1 - 2 hours to ensure sufficient surface strengthening effect; the treatment time of the nitrooxidation treatment is also 1 - 2 hours to ensure that the depth and density of the oxide layer meet the design requirements. Meanwhile, in order to further optimize the surface finish, an intelligent adaptive polishing technology is adopted. This technology uses a feedback control system to monitor the pressure and speed during the polishing process in real time, and automatically adjusts the parameters according to the feedback data to optimize the polishing effect, ensuring that the surface reaches a high finish, and further improving the surface quality and service life of the product. Through this series of surface optimization treatments, the wear resistance, corrosion resistance, and surface finish of the cylinder liner column are enhanced, improving its overall performance and adaptability.

[0036] In S8, the holding pressure of the hydrostatic test is 0.8 MPa, and the holding time is 1 - 2 hours. During the hydrostatic test, the pressure rising rate is controlled at 0.1 - 0.2 MPa / min. The comprehensive leak tightness test uses a helium mass spectrometer leak detector with a leak detection accuracy of 1×10⁻ 6 Pa・m³ / s.

[0037] Specifically, the holding pressure of the hydrostatic test is set at 0.8 MPa to ensure that the system can withstand the pressure requirements under normal working conditions, and at the same time verify its structural integrity and pressure resistance. During the test, clean water is filled into the system, and a high-precision pressure control device is used to make the pressure rise slowly at the set rate, specifically controlled at 0.1 - 0.2 MPa / min, to avoid damage to the system structure or stress concentration caused by instantaneous pressure surges, thus affecting the accuracy of the test results. After the pressure reaches 0.8 MPa, hold the pressure for 1 - 2 hours to observe the stability of the system in a high-pressure environment, ensuring no leakage, no abnormal deformation, etc.

[0038] In addition, to further verify the sealing performance of the system, a helium mass spectrometer leak detector is used for a comprehensive leak tightness test. During the test, the system is first fully evacuated to remove the residual gas inside, then helium is introduced as a tracer gas, and a high-sensitivity helium mass spectrometer leak detector is used for leak detection. This instrument can detect trace helium leakage, and the leak detection accuracy can reach 1×10⁻ 6Pa·m³ / s, which can accurately identify the tiny leakage points of the system and ensure excellent sealing performance of the system during actual use. This testing method has high sensitivity, can effectively ensure the long-term stable operation of the system, and avoid the decline of system performance or potential safety risks caused by micro-leakage. This embodiment comprehensively combines the hydrostatic test and high-precision sealing detection to achieve a comprehensive verification of the pressure resistance and sealing performance of the system, providing a strong guarantee for the reliable application of the system.

[0039] In S9, the inspection includes whether the dimensions, appearance, and performance of the product meet the design requirements. The measurement accuracy of the coordinate measuring machine is ±0.005 mm, and the quality report includes various performance indicators of the product and the results detected by the coordinate measuring machine.

[0040] Specifically, to ensure that the product meets the design requirements, it is necessary to comprehensively detect the dimensions, appearance, and performance. The dimension detection uses a coordinate measuring machine with a measurement accuracy of ±0.005 mm, which can accurately detect key dimensions and geometric tolerances to ensure that the product structure meets the design specifications. The appearance inspection combines optical equipment and manual inspection to check for scratches, dents, deformations, and coating defects to ensure that the appearance quality meets the standards. The performance detection is carried out according to the technical specifications, including relevant tests such as mechanics, electricity, or sealing, to verify the stability and reliability of the product under operating conditions. All the detection data are finally summarized in the quality report, which completely records the performance indicators and the coordinate measuring results to ensure that the product quality is traceable and the performance meets the standards, meeting the design and application requirements.

[0041] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A processing technology of a cylinder liner column, characterized in that It includes the following steps: S1. First, select a suitable bar stock, choose the material according to the size requirements of the water-cooled core and the guide pillar, then process it. After cutting, conduct flaw detection on the material, and then use a turning tool to perform rough turning on the outer shape and internal hole processing; S2. Subsequently, use deep hole drilling equipment to perform deep hole processing on the water-cooled core and the guide pillar and cool it. Then, use a milling machine to process the water inlet and outlet holes to ensure the accuracy of the holes. At the same time, perform surface treatment on the hole edges to reduce burrs and improve the durability of the holes; S3. Next, preprocess the interface part of the water-cooled core and the guide pillar. When connecting with threads, use a precision fitting locking device to improve the connection strength and tighten it after assembly; S4. Then, weld the connection part of the water-cooled core and the guide pillar, and conduct flaw detection after welding. After welding, perform low-temperature uniform tempering treatment to reduce the residual stress in the welding area; S5. Then, perform multi-stage heat treatment on the cylinder sleeve column. Use local induction hardening technology to improve the hardness and wear resistance of key parts, and at the same time perform nitriding diffusion treatment on the surface; S6. Subsequently, perform precision machining. During this process, combine an AI monitoring system and use a five-axis machining center to machine the special-shaped holes to improve the dimensional accuracy and machining quality of the special-shaped parts; S7. Then, perform surface optimization treatment on the machined cylinder sleeve column, then perform superfine polishing on the key parts, and use intelligent adaptive polishing technology to optimize the surface finish; S8. Subsequently, conduct a hydrostatic test to detect the sealing performance and pressure resistance of the cylinder sleeve column, conduct a comprehensive sealing test. After the test is completed, the product meets the standard sealing requirements, and record the test results; S9. Finally, conduct a comprehensive inspection on the cylinder sleeve column. Use a coordinate measuring machine to detect the accuracy of all dimensions. Package the qualified products finally and attach a quality report for shipment. For unqualified products, reprocess or rework them.

2. The processing technology of a cylinder liner column according to claim 1, characterized in that: In S1, the processing method adopts precision sawing and reserves a machining allowance of 3 mm in the length direction. The flaw detection adopts ultrasonic flaw detection. The internal hole processing is used to make the outer shape size and the coaxiality of the internal hole of the bar stock meet the design requirements. The ultrasonic flaw detection is used to detect internal defects.

3. The processing technology of a cylinder liner column according to claim 1, characterized in that: In S2, the cooling method adopts high-pressure internal cooling oil-based cutting fluid for cooling. The cooling is used to avoid affecting the shape of the hole due to thermal deformation. The deep hole drilling equipment includes a gun drill and a single-tube internal chip removal deep hole drill.

4. The processing technology of a cylinder liner column according to claim 1, characterized in that: In S3, the preprocessing adopts double-layer high-temperature sealant plus a metal sealing ring for sealing, with a temperature resistance of ≥ 350 °C. The precision fitting locking device includes a lock washer, an elastic washer, a locking nut or a locking mechanism.

5. The processing technology of a cylinder liner column according to claim 1, characterized in that: In S4, the welding adopts full-circumference laser cladding welding technology for welding, which is used to increase the strength of the interface and reduce thermal deformation. The flaw detection after welding adopts X-ray flaw detection and ultrasonic flaw detection to ensure that there are no defects in the weld. The low-temperature uniform tempering treatment includes a heating stage, an insulation stage and a cooling stage. The heating rate in the heating stage is 50 - 100 °C / h, the insulation time in the insulation stage is 1 - 2 hours, and the cooling stage adopts air cooling or natural cooling.

6. The processing technology of a cylinder liner column according to claim 1, characterized in that: In S5, the multi-stage heat treatment includes quenching and tempering, and the quenching and tempering are used to improve its strength, wear resistance and temperature adaptability. The local induction strengthening technology includes an induction coil, electric heating, and a cooling system. The key parts include the inner wall contacted by the piston ring, the sealing part, and the transition area subjected to greater stress. The nitriding diffusion treatment includes a nitriding medium, a nitriding temperature, a nitriding time, and a diffusion process, and the nitriding diffusion treatment is used to improve corrosion resistance and durability.

7. The processing technology of a cylinder liner column according to claim 1, characterized in that: In S6, the precision machining is performed using a CNC lathe, and the precision machining is used to ensure that the accuracy of the size and shape of each part meets the design standards. The AI ​​monitoring system is used to adjust the machining error by real-time monitoring of cutting force and vibration parameters.

8. The processing technology of a cylinder liner column according to claim 1, characterized in that: In S7, the surface optimization treatment includes ABP shot peening and nitriding treatment, and the surface optimization treatment is used to enhance its wear resistance and corrosion resistance. The shot peening time of the ABP shot peening and the nitriding time of the nitriding are 1-2 hours, and the intelligent adaptive polishing technology optimizes the finish by feedback controlling the polishing pressure and speed.

9. The processing technology of a cylinder liner column according to claim 1, characterized in that: In S8, the holding pressure of the hydrostatic test is 0.8 MPa, and the holding time is 1 - 2 hours. During the hydrostatic test, the pressure rising rate is controlled within 0.1 - 0.2 MPa / min. The overall leak tightness test is carried out using a helium mass spectrometer leak detector with a leak detection accuracy of 1×10⁻ 6 Pa・m³ / s.

10. The processing technology of a cylinder liner column according to claim 1, characterized in that: In S9, the inspection includes whether the size, appearance and performance of the product meet the design requirements. The measurement accuracy of the three-coordinate measuring machine is ±0.005mm. The quality report includes various performance indicators of the product and the results of the three-coordinate measuring machine inspection.

Images