A high-roughness hole honing method

Abstract

This invention relates to a method for honing high-roughness holes, belonging to the field of honing technology. It addresses the problems in existing high-roughness hole honing processes, such as poor tool compatibility, inconsistent honing process parameters, lack of standardized tool replacement, and poor adaptability to the honing environment, leading to inconsistent machining quality. The invention includes the following steps: workpiece pretreatment and hardness testing; preparation and precise selection of honing tools; honing equipment parameter adjustment; preparation of honing media; honing processing and process control; and finished product inspection and processing. This invention's high-roughness hole honing method achieves precision, efficiency, and stability in high-roughness hole machining, adapting to the processing needs of different material hardnesses, different hole diameters, and different seasonal environments.

Description

Technical Field

[0001] This invention belongs to the field of metal cutting processing technology, specifically relating to a method for honing high-roughness holes. Background Technology

[0002] Honing is a high-precision hole machining process, mainly used for finishing workpiece holes after drilling and boring, adjusting the roughness, roundness, and cylindricity of the workpiece holes. Currently, most existing honing processes focus on machining with low roughness (Ra≤1.0μm). However, in fields such as mining machinery, construction machinery, and heavy equipment, some workpiece holes do not require ultra-low roughness; instead, they require a high roughness surface with Ra>1.0μm to improve the fit between the hole and the mating parts.

[0003] Existing high-roughness hole honing processes suffer from four major shortcomings: First, poor tool compatibility, failing to accurately match the particle size of the wear-resistant material in the honing layer to the workpiece material hardness, leading to excessively rapid wear of the honing layer or unsatisfactory machined surfaces. Second, chaotic process parameters, with feed rate, spindle speed, particle size, and honing allowance not being properly matched, and the impact of hole diameter on the honing allowance not being considered. Third, lack of standardized tool replacement methods, relying solely on experience to judge tool wear status, easily causing fluctuations in workpiece quality. Fourth, neglecting environmental influences, failing to adjust the honing medium temperature for seasonal changes, resulting in unstable lubrication and cooling properties of the honing medium, affecting the consistency of machining quality. Therefore, a new high-roughness hole honing method is needed to address the problems of poor tool compatibility, chaotic honing process parameters, lack of standardized tool replacement, and poor adaptability to the honing environment in existing high-roughness hole honing processes, leading to poor machining quality stability. Summary of the Invention

[0004] The purpose of this invention is to provide a high-roughness honing method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for honing high-roughness holes, comprising the following steps: S1. Workpiece pretreatment and hardness testing: Clean the machined holes of the workpiece and use testing tools to test the initial hole diameter, roundness and hardness of the workpiece material. S2. Preparation and precise selection of honing tools: Based on the workpiece material and hardness in S1, the honing tools are tempered and treated. According to the roughness requirements and hole diameter of the workpiece, suitable wear-resistant particles and preparation process are selected to prepare the honing layer of the honing tool, and the honing allowance is set. S3. Honing equipment parameter adjustment: Install the prepared honing tool on the honing machine, and adjust the operating parameters according to the roughness requirements and hole diameter of the workpiece to determine the honing process parameters. S4. Preparation of honing media: Select appropriate honing media according to the material and hardness of the workpiece, and determine the honing temperature of the honing media according to the seasonal temperature of the processing environment; honing media include kerosene. S5. Honing and process control: Honing is performed according to the honing process parameters determined in S3 and the honing media and honing temperature selected in S4. During the process, impurities in the honing media are removed; a threshold standard for honing tool replacement is established. S6. Finished Product Inspection and Processing: After honing, the finished workpiece is inspected for quality. If the roughness test shows that the workpiece is unqualified, the tool or honing process parameters are adjusted and a second honing is performed. If the workpiece is qualified, surface cleaning and rust prevention treatment are performed.

[0006] Preferably, in step S1, the workpiece pretreatment and hardness testing include the following steps: S10. Pre-cleaning of the machining holes of the workpiece: Use a high-pressure air gun to blow away iron filings from the inner wall of the hole, use industrial alcohol to remove oil stains, and check the initial hole diameter and roundness to ensure that the initial hole diameter deviation is ≤ ±0.02mm and the roundness deviation is ≤ ±0.01mm. S11. Test the workpiece material and hardness: Use a Rockwell hardness tester to test the hardness of the workpiece material and record the hardness value, which serves as the core basis for selecting the particle size of the tool wear-resistant material.

[0007] Preferably, in S2, the preparation and precise selection of the honing tool includes the following steps: S20. Selection of cutting tool body material and tempering treatment: Based on the workpiece material and hardness in S1, the cutting tool body is made of 40Cr alloy steel and tempered to a hardness of HRC 28-32. S21. Select the appropriate wear-resistant material for the honing layer based on the workpiece material and hardness: the wear-resistant material for honing tools should be diamond or CBN; the particle size of the wear-resistant particles should be compatible with the hardness of the workpiece material. S22. Preparation of honing layer for honing tools: Select electroplating or welding process to prepare honing layer according to the roughness requirements of the workpiece's machined hole. S23. Set honing allowance: Based on the honing layer preparation process of the honing tool in S22, set the basic honing allowance; set the correction coefficient K according to the diameter of the workpiece machining hole, and calculate to obtain the actual honing allowance.

[0008] As a preferred option, in S21, when selecting wear-resistant materials, if the workpiece is a non-quenched steel part, the wear-resistant material is diamond material, which is artificial diamond particles with a purity ≥99%; if the hardness of the non-quenched steel part is ≤HRC 20, the artificial diamond particle size is 60 mesh; if the workpiece is a quenched steel part, the wear-resistant material is CBN material, which is cubic boron nitride wear-resistant particles; if the hardness of the quenched steel part is HRC 40-60, the CBN particle size is 30-40 mesh.

[0009] Preferably, in S22, when the roughness Ra of the workpiece machining hole is greater than 2.0 μm, a copper-based solder is selected for the welding process to prepare the honing layer, and the thickness of the solder layer is controlled within the range of 0.05-0.08 mm; when the roughness Ra of the workpiece machining hole is between 1.0 and 2.0 μm, an electroplating process is selected to prepare the honing layer, and the thickness of the plating layer is controlled within the range of 0.03-0.05 mm.

[0010] Preferably, in S23, when setting the basic honing allowance, the honing tool with the honing layer prepared by electroplating is set with a basic honing allowance of 0.08-0.15mm, while the honing tool with the honing layer prepared by welding is set with a basic honing allowance of 0.15-0.325mm. When setting the correction coefficient K, according to the workpiece machining hole diameter φ<50mm, K=0.8; when the hole diameter is 50mm≤φ≤100mm, K=1.0; when the hole diameter is φ>100mm, K=1.2. The formula for calculating the actual honing allowance is: actual honing allowance = basic honing allowance × K.

[0011] Preferably, in S3, the honing process parameters include the tool feed rate and the tool rotation speed; the tool feed rate is ≥100mm / min, and the tool rotation speed is ≤100r / min.

[0012] Preferably, in S4, the honing medium includes pure kerosene or a mixture of kerosene and diesel; 5% honing oil is added to the honing medium; in the mixture of kerosene and diesel, kerosene accounts for 50%-60%; the honing temperature is controlled at 15-30℃ depending on the seasonal temperature of the processing environment.

[0013] Preferably, when the processing ambient temperature is <10℃, the honing medium temperature is controlled at 20-25℃; when the processing ambient temperature is >30℃, the honing temperature is controlled at 15-20℃; when the processing ambient temperature is 10-30℃, the honing temperature is consistent with the processing ambient temperature.

[0014] Preferably, in S5, the honing process and process control include the following steps: S50. Start the honing machine and perform honing according to the adjusted parameters and the honing medium with controlled temperature. Observe the grinding status in real time during the process. If abnormal noise occurs or the honing medium temperature exceeds the control range of ±3℃, stop the machine immediately for inspection. S51. During continuous honing, a magnetic separator must be used to clean the iron filings in the honing media. S52. Tool wear judgment and replacement: Regularly check the thickness of the honing layer of the tool. When the wear of the electroplated layer is ≥50% or the wear of the welded layer is ≥50%, replace the tool immediately. Auxiliary standard for quality judgment: When the roughness test value of three consecutive workpieces exceeds the preset tolerance range, the cutting tool should be replaced directly.

[0015] Beneficial effects: 1. The high roughness hole honing method of the present invention can comprehensively and accurately improve adaptability: establish a dual precise matching system of "workpiece material hardness - wear-resistant material particle size of tool honing layer" and "hole size - honing allowance", and introduce a seasonal honing medium temperature control scheme to solve the processing adaptability problem under different working conditions.

[0016] 2. Based on the foregoing, the high roughness hole honing method of the present invention can significantly enhance the stability of machining quality: the quantified tool wear replacement standard and the stable honing medium temperature control effectively avoid quality fluctuations caused by tool wear and environmental changes, and greatly reduce the scrap rate.

[0017] 3. Based on the foregoing, the high roughness hole honing method of the present invention has better processing efficiency and cost: reasonable parameter matching and precise tool selection improve processing efficiency while reducing tool wear, and combined with medium temperature control, energy consumption is reduced, achieving the best overall cost.

[0018] 4. Based on the foregoing, the high roughness hole honing method of the present invention is simple to operate and highly reproducible: the process steps are clear, each step has clear quantitative standards, no complicated professional skills are required, and it is easy to promote and apply in batches in the workshop. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the honing process for a high-roughness hole honing method as described in the embodiment. Detailed Implementation

[0020] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the embodiments.

[0021] Please see Figure 1 This embodiment provides a method for honing high-roughness holes, including the following steps: S1. Workpiece pretreatment and hardness testing: S10. Pre-cleaning of the machining holes of the workpiece to be machined: Use a high-pressure air gun to blow away iron filings from the inner wall of the hole, with an air gun pressure of 0.6-0.8 MPa; use industrial alcohol to remove oil stains, check the initial hole diameter and roundness, and ensure that the initial hole diameter deviation is ≤ ±0.02 mm and the roundness deviation is ≤ ±0.01 mm. S11. Use a Rockwell hardness tester to test the hardness of the workpiece material and record the hardness value as the core basis for selecting tool particle size. S2. Preparation and precise selection of honing tools: S20. Selection of tool body material and tempering treatment of honing tools: Based on the workpiece material and hardness in S1, the tool body is made of 40Cr alloy steel and tempered to a hardness of HRC 28-32 to ensure that the tool body has sufficient strength and toughness and to prevent tool body deformation under high feed conditions. S21. Select the appropriate wear-resistant material for the honing layer based on the workpiece material and hardness: When the workpiece material is non-quenched steel and the hardness is ≤HRC 20, use artificial diamond wear-resistant particles with a purity ≥99% and a particle size of 60 mesh; when the honing part is quenched steel and the hardness is HRC 40-60, use CBN (cubic boron nitride) wear-resistant particles with a particle size of 30-40 mesh. S22. Preparation of the honing layer for the honing tool: Select either electroplating or welding processes to prepare the honing layer according to the surface roughness requirements of the workpiece's machined hole. When the surface roughness requirement of the workpiece's machined hole is Ra=1.0~2.0μm, use electroplating to prepare the tool, with the plating thickness controlled at 0.03-0.05mm. When the surface roughness requirement of the machined hole is Ra>2.0μm, use welding to prepare the tool, selecting copper-based solder, with the solder layer thickness controlled at 0.05-0.08mm. S23. Setting the honing allowance: Based on the honing layer preparation process of the honing tool in S22, set the basic honing allowance; set the correction coefficient K according to the hole diameter of the workpiece, and calculate to obtain the actual honing allowance; among which, when setting the basic honing allowance, for honing tools that use electroplating to prepare the honing layer, the basic honing allowance is set to 0.08-0.15mm, while for those that use welding... The honing tool used in the process of preparing the honing layer has a basic honing allowance set to 0.15-0.325 mm. When setting the correction coefficient K, it is calculated as follows: K=0.8 when the workpiece hole diameter φ<50 mm; K=1.0 when the hole diameter 50 mm ≤ φ ≤ 100 mm; and K=1.2 when the hole diameter φ>100 mm. The actual honing allowance is calculated as: Actual honing allowance = Basic honing allowance × K. S3. Honing Equipment Parameter Adjustment: Install the prepared honing tool on the honing machine, and adjust the core operating parameters for high-roughness and high-precision machining conditions: - Tool feed rate: ≥100mm / min. Increasing the feed rate can improve machining efficiency while ensuring the uniformity of texture on high-roughness surfaces. - Tool speed: ≤100r / min. Reducing the speed can avoid surface scratches caused by high-speed grinding, ensure that the surface roughness meets the preset requirements, and reduce tool wear. S4. Preparation of Honing Media: Based on the hardness and grinding difficulty of the workpiece material, select the appropriate honing media, and determine the honing temperature of the honing media according to the seasonal temperature of the processing environment. In this embodiment, the honing media includes pure kerosene or a mixture of kerosene and diesel oil. Pure kerosene honing media is suitable for grinding non-quenched steel parts with lower grinding difficulty, providing good cooling and quickly removing grinding chips. The kerosene and diesel oil mixture is suitable for grinding quenched steel parts with higher grinding difficulty; the kerosene content in the mixture is 50%-60%, and the diesel oil enhances the lubrication of the media and reduces friction between the tool and the workpiece. Approximately 5% of a special extreme pressure honing oil can be added to the honing media to improve its extreme pressure lubrication performance. The honing temperature is controlled between 15-30℃ according to the seasonal temperature of the processing environment. Specifically, seasonal temperature control is implemented. - In winter (processing ambient temperature <10℃): Use a constant temperature heating device to preheat the honing medium to 20-25℃ to avoid insufficient lubrication due to increased viscosity of the honing medium; - Summer (processing ambient temperature > 30℃): Use a cooling circulation device to cool the honing media to 15-20℃ to avoid the honing media temperature being too high and causing cooling failure; - Spring and autumn (processing ambient temperature 10-30℃): No additional temperature control is required; simply maintain the honing medium temperature consistent with the processing ambient temperature. S5. Honing and process control: S50. Start the honing machine and hone according to the adjusted parameters and the honing medium with controlled temperature. Observe the grinding status in real time during the process. If abnormal noise occurs or the honing medium temperature exceeds the control range of ±3℃, stop the machine immediately for inspection. S51. During continuous honing, a magnetic separator must be used to clean the iron filings in the honing media to prevent iron filings from remaining and causing scratches on the workpiece surface. S52. Tool wear judgment and replacement: Regularly check the thickness of the honing layer of the tool. When the wear of the electroplated layer is ≥50% or the wear of the weld layer is ≥50%, replace the tool immediately. Auxiliary standard for quality judgment: When the surface roughness test value of three consecutive workpieces exceeds the preset tolerance range, the cutting tool should be replaced directly to avoid the generation of batches of defective products; S6. Finished Product Inspection and Processing: After honing, use a roughness tester to check the Ra value of the workpiece hole, and use a roundness tester to check the roundness and cylindricity of the hole. The cylindricity deviation must be ≤ ±0.015mm. If the roughness does not meet the requirements, the particle size of the wear-resistant material in the honing layer or the feed speed can be adjusted according to the deviation, and a second honing can be performed. If the inspection is qualified, use a high-pressure air gun to blow away the residual medium on the inner wall of the hole, then wipe it clean with industrial alcohol, and perform drying and rust prevention treatment to complete the entire honing process.

[0022] To further illustrate the precision, efficiency, and stability of the high-roughness hole honing method in this embodiment, and to adapt to the processing needs of different material hardnesses, different hole diameters, and different seasonal environments, several representative embodiments are selected for comparative explanation.

[0023] Example 1: Non-quenched steel part (45 steel, HRC 15), small diameter (φ40mm), Ra=1.5μm, processed in winter; 1. Workpiece: No. 45 non-quenched steel hole, initial hole diameter φ40mm, initial roundness ≤±0.01mm, hardness HRC 15; 2. Tool selection: The tool body is made of 40Cr alloy steel with quenching and tempering treatment (HRC 30), and the wear-resistant layer is made of 99.2% pure artificial diamond particles, prepared by electroplating process, with a coating thickness of 0.04mm and a particle size of 60 mesh; 3. Process parameters: basic honing allowance 0.12mm, hole diameter correction coefficient K=0.8, actual honing allowance = 0.12×0.8=0.096mm; feed speed 105mm / min, rotation speed 90r / min; 4. Honing media: pure kerosene + 5% extreme pressure honing oil, preheated to 22℃; 5. Processing results: After honing, the hole has Ra=1.48μm, roundness≤0.005mm, cylindricity≤0.01mm, uniform surface texture, and can process ≥80 workpieces with a single tool.

[0024] Example 2: Quenched steel part (Cr12MoV, HRC 58), medium diameter (φ80mm), Ra=2.5μm, processed in summer; 1. Workpiece: Cr12MoV quenched steel hole, initial hole diameter φ80mm, initial roundness ≤±0.01mm, hardness HRC 58; 2. Tool selection: The tool body is made of 40Cr alloy steel with quenching and tempering treatment (HRC 31), the wear-resistant layer is CBN particles, prepared by welding process (copper-based solder), the weld layer thickness is 0.07mm, and the particle size is 36 mesh; 3. Process parameters: basic honing allowance 0.2mm, hole diameter correction coefficient K=1.0, actual honing allowance = 0.2×1.0=0.2mm; feed speed 110mm / min, rotation speed 85r / min; 4. Honing media: a mixture of kerosene and diesel oil (kerosene accounting for 55%) + 5% extreme pressure honing oil, cooled to 18℃; 5. Machining results: After honing, the hole has Ra=2.47μm, roundness≤0.006mm, cylindricity≤0.012mm, the tool has good impact resistance, no chipping, and a single tool can process ≥60 workpieces.

[0025] Example 3: Quenched steel part (40Cr, HRC 50), large diameter (φ120mm), Ra=3.0μm, processed in spring; 1. Workpiece: 40Cr quenched steel hole, initial hole diameter φ120mm, initial roundness ≤±0.01mm, hardness HRC 50; 2. Tool selection: The tool body is made of 40Cr alloy steel with quenching and tempering treatment (HRC 29), the wear-resistant layer is CBN particles, prepared by welding process (copper-based solder), the weld layer thickness is 0.06mm, and the particle size is 40 mesh; 3. Process parameters: basic honing allowance 0.22mm, hole diameter correction coefficient K=1.2, actual honing allowance = 0.22×1.2=0.264mm; feed speed 100mm / min, rotation speed 100r / min; 4. Honing media: a mixture of kerosene and diesel oil (kerosene accounting for 60%) + 5% extreme pressure honing oil, with a processing ambient temperature of 20℃ and the honing media temperature synchronized with the processing ambient temperature; 5. Processing results: After honing, the hole has Ra=2.95μm, roundness≤0.008mm, cylindricity≤0.013mm, and the processing efficiency is improved by more than 30% compared with the existing process, and the scrap rate is reduced to below 0.5%.

[0026] Working Principle: The high-roughness hole honing method of this embodiment solves the technical problems of poor tool compatibility, unstable machining accuracy, insufficient wear resistance, and mismatch between process parameters and workpiece material, roughness requirements, and hole diameter when machining high-roughness holes using existing honing processes. Furthermore, the machining quality fluctuates due to the influence of ambient temperature. This high-roughness hole honing method precisely matches the honing tool's manufacturing process, wear-resistant material, and particle size, combines workpiece material and hardness selection, introduces a hole diameter correction coefficient to optimize the honing allowance, formulates a seasonal honing medium temperature control scheme, and clarifies the tool wear judgment criteria. This achieves efficient, accurate, and stable machining of various high-roughness holes with Ra > 1.0 μm, balancing machining quality and production efficiency. It is applicable to high-roughness hole machining scenarios for workpieces made of various materials, including hardened steel and non-hardened steel.

[0027] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for honing high-roughness holes, characterized in that: Includes the following steps: S1. Workpiece pretreatment and hardness testing: Clean the machined holes in the workpiece and use testing tools to test the initial hole diameter, roundness and hardness of the workpiece material. S2. Preparation and precise selection of honing tools: Based on the workpiece material and hardness in S1, the honing tools are tempered and treated. According to the roughness requirements and hole diameter of the workpiece, suitable wear-resistant particles and preparation process are selected to prepare the honing layer of the honing tool, and the honing allowance is set. S3. Honing equipment parameter adjustment: Install the prepared honing tool on the honing machine, and adjust the operating parameters according to the roughness requirements and hole diameter of the workpiece to determine the honing process parameters. S4. Preparation of honing media: Select suitable honing media according to the material and hardness of the workpiece, and determine the honing temperature of the honing media according to the seasonal temperature of the processing environment; the honing media includes kerosene. S5. Honing and process control: Honing is performed according to the honing process parameters determined in S3 and the honing media and honing temperature selected in S4. During the process, impurities in the honing media are removed; a threshold standard for honing tool replacement is established. S6. Finished Product Inspection and Processing: After honing, the finished workpiece is inspected for quality. If the roughness test shows that the workpiece is unqualified, the tool or honing process parameters are adjusted and a second honing is performed. If the workpiece is qualified, surface cleaning and rust prevention treatment are performed.

2. The high-roughness hole honing method according to claim 1, characterized in that, In S1, the workpiece pretreatment and hardness testing include the following steps: S10. Pre-cleaning of the machining holes of the workpiece: Use a high-pressure air gun to blow away iron filings from the inner wall of the hole, use industrial alcohol to remove oil stains, and check the initial hole diameter and roundness to ensure that the initial hole diameter deviation is ≤ ±0.02mm and the roundness deviation is ≤ ±0.01mm. S11. Test the workpiece material and hardness: Use a Rockwell hardness tester to test the hardness of the workpiece material and record the hardness value, which serves as the core basis for selecting the particle size of the tool wear-resistant material.

3. The high-roughness hole honing method according to claim 2, characterized in that, In S2, the preparation and precise selection of honing tools include the following steps: S20. Selection of cutting tool body material and tempering treatment: Based on the workpiece material and hardness in S1, the cutting tool body is made of 40Cr alloy steel and tempered to a hardness of HRC 28-32. S21. Select a suitable wear-resistant material for the honing layer based on the workpiece material and hardness: the wear-resistant material of the honing tool is diamond or CBN; the particle size of the wear-resistant particles is compatible with the hardness of the workpiece material. S22. Preparation of honing layer for honing tools: Select electroplating or welding process to prepare honing layer according to the roughness requirements of the workpiece's machined hole. S23. Set honing allowance: Based on the honing layer preparation process of the honing tool in S22, set the basic honing allowance; set the correction coefficient K according to the diameter of the workpiece machining hole, and calculate to obtain the actual honing allowance.

4. The high-roughness hole honing method according to claim 3, characterized in that, In S21, when selecting wear-resistant materials, if the workpiece is a non-quenched steel part, the wear-resistant material is diamond material, which is artificial diamond particles with a purity ≥99%; if the hardness of the non-quenched steel part is ≤HRC 20, the artificial diamond particle size is 60 mesh; if the workpiece is a quenched steel part, the wear-resistant material is CBN material, which is cubic boron nitride wear-resistant particles; if the hardness of the quenched steel part is HRC 40-60, the CBN particle size is 30-40 mesh.

5. A method for honing high-roughness holes according to claim 3, characterized in that, In S22, when the roughness Ra of the workpiece machining hole is greater than 2.0 μm, a copper-based solder is selected for the welding process to prepare the honing layer, and the thickness of the solder layer is controlled within the range of 0.05-0.08 mm; when the roughness Ra of the workpiece machining hole is between 1.0 and 2.0 μm, an electroplating process is selected to prepare the honing layer, and the thickness of the plating layer is controlled within the range of 0.03-0.05 mm.

6. The high-roughness hole honing method according to claim 3, characterized in that, In S23, when setting the basic honing allowance, the basic honing allowance for honing tools using electroplating to prepare the honing layer is set to 0.08-0.15mm, while for honing tools using welding to prepare the honing layer, the basic honing allowance is set to 0.15-0.325mm. When setting the correction coefficient K, according to the workpiece machining hole diameter φ < 50mm, K = 0.8; when the hole diameter 50mm ≤ φ ≤ 100mm, K = 1.0; when the hole diameter φ > 100mm, K = 1.

2. The formula for calculating the actual honing allowance is: Actual honing allowance = Basic honing allowance × K.

7. The high-roughness hole honing method according to claim 1, characterized in that, In S3, the honing process parameters include the tool feed rate and the tool rotation speed; the tool feed rate is ≥100mm / min and the tool rotation speed is ≤100r / min.

8. A method for honing high-roughness holes according to claim 1, characterized in that, In S4, the honing medium includes pure kerosene or a mixture of kerosene and diesel oil; 5% honing oil is added to the honing medium; in the mixture of kerosene and diesel oil, kerosene accounts for 50%-60%; the honing temperature is controlled at 15-30℃ according to the seasonal temperature of the processing environment.

9. A method for honing high-roughness holes according to claim 8, characterized in that, When the processing environment temperature is <10℃, the honing medium temperature is controlled at 20-25℃; when the processing environment temperature is >30℃, the honing temperature is controlled at 15-20℃; when the processing environment temperature is 10-30℃, the honing temperature is consistent with the processing environment temperature.

10. A method for honing high-roughness holes according to claim 1, characterized in that, In S5, honing and process control include the following steps: S50. Start the honing machine and perform honing according to the adjusted parameters and the honing medium with controlled temperature. Observe the grinding status in real time during the process. If abnormal noise occurs or the honing medium temperature exceeds the control range of ±3℃, stop the machine immediately for inspection. S51. During continuous honing, a magnetic separator must be used to clean the iron filings in the honing media. S52. Tool wear judgment and replacement: Regularly check the thickness of the honing layer of the tool. When the wear of the electroplated layer is ≥50% or the wear of the welded layer is ≥50%, replace the tool immediately. Auxiliary standard for quality judgment: When the roughness test value of three consecutive workpieces exceeds the preset tolerance range, the cutting tool should be replaced directly.

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