Precise equipment pipe fitting inner diameter machining method

Abstract

The invention belongs to the technical field of precision equipment, and particularly relates to a precision equipment pipe fitting inner diameter machining method which comprises the following steps that 1, a clamp is designed and manufactured; 2, pipe fittings are fixed; 3, rough machining of the inner diameter; step 4, finish machining of the inner diameter; step 5, replacing the end part and repeatedly processing; 6, communicating the inner diameters of the two ends; 7, detecting the inner diameter and the levelness; step 8, adjusting and correcting; and step 9, dismounting and cleaning. Through combination of rough machining and fine machining, high-precision and high-quality surfaces are achieved, the inner diameter and levelness are detected at the same time, quality is ensured, the special clamp stabilizes the pipe fitting, errors and vibration are reduced, cutting parameters are monitored and adjusted in the whole process, the adjustable clamp adapts to different specifications, internal and external cleaning is ensured through dismounting and cleaning, pollution is avoided, and the outer wall of the pipe fitting does not need to be clamped; and the deformation of the pipe fitting caused by processing is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of precision equipment, and in particular relates to a method for processing the inner diameter of a precision equipment pipe. Background Art

[0002] Precision equipment refers to equipment and devices used to generate and measure precision quantities, including observation, monitoring, measurement, verification, recording, transmission, transformation, display, analysis, processing and control of precision quantities. Precision equipment is an important branch of instrumentation and is widely used in scientific research institutions and engineering technology. These devices have the characteristics of high precision, high speed, high efficiency and high reliability, and can play an important role in various links such as manufacturing, processing, assembly and testing. The application range of precision equipment is very wide, mainly used in aerospace, electronics, semiconductors, optics, precision instruments, medical equipment, automobile manufacturing and other fields. Among them, high-tech fields such as aerospace, electronics, semiconductors and other high-tech fields have higher requirements for precision electromechanical equipment, requiring higher precision, higher speed and higher reliability to ensure product quality and performance.

[0003] When processing the inner diameter of existing precision equipment pipe fittings, conventional clamps are generally used to clamp the outer wall of the pipe fittings, and then the inner diameter is processed. The outer wall of the pipe fitting is easily deformed during the clamping process, resulting in the pipe fittings being unable to guarantee accuracy in subsequent use. For this reason, we propose a method for processing the inner diameter of precision equipment pipe fittings to solve the above problem. Summary of the invention

[0004] The purpose of the present invention is to provide a method for processing the inner diameter of a precision equipment pipe fitting, which can achieve high precision and high-quality surface through a combination of rough and fine processing, detect the inner diameter and levelness at the same time to ensure quality, stabilize the pipe fitting with a special fixture, reduce errors and vibrations, monitor and adjust cutting parameters throughout the process, and adjust the fixture to adapt to different specifications. Disassembly and cleaning ensures internal and external cleanliness to avoid contamination, does not require clamping the outer wall of the pipe fitting, and reduces deformation of the pipe fitting caused by processing.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A method for processing the inner diameter of a precision equipment pipe fitting, the method comprising the following steps:

[0007] Step 1. Fixture design and production;

[0008] Step 2. Fix the pipe fittings;

[0009] Step 3. Rough machining of inner diameter;

[0010] Step 4. Inner diameter finishing;

[0011] Step 5. End replacement and repeated processing;

[0012] Step 6. Process the inner diameters of both ends to connect;

[0013] Step 7. Inner diameter and levelness detection;

[0014] Step 8. Adjustment and correction;

[0015] Step 9. Disassembly and cleanup.

[0016] In a preferred embodiment, the clamp is designed and manufactured according to the size and shape of the pipe fitting, as well as the specific requirements of the inner diameter processing, and the design requirements are analyzed to determine the functions that the clamp needs to have, including firm fixation and adjustable expansion. The drawings of the clamp are designed, and the various parts of the clamp are processed using precision machine tools according to the design drawings. The processed parts are assembled and functional tests are performed. The clamp is stably expanded and fixed inside the pipe fitting, and the clamp is adjusted and optimized according to the test results.

[0017] In a preferred embodiment, the method of fixing the pipe is to place the pipe to be processed on a workbench, insert a prepared fixture into the inner diameter of one end of the pipe, adjust the fixture to expand it and firmly fix it on the inner wall of the pipe, adjust the clamping device of the machine tool according to the size of the pipe and processing requirements, and install the pipe with the fixture fixed at the processing position of the machine tool.

[0018] In a preferred embodiment, the inner diameter rough machining is to select an appropriate rough machining tool according to the size and material of the inner diameter of the pipe fitting, the rough machining tool is an inner diameter turning tool or a reamer, and the cutting speed v_c and the feed rate f are set;

[0019] v_c=π·D·n;

[0020] Where D is the tool diameter, n is the spindle speed;

[0021] f = v_f·n;

[0022] Among them, v_f is the feed per revolution;

[0023] Turn on the machine tool and adjust the tool position so that it gradually enters the inner diameter of the pipe for cutting. Control the cutting speed and feed rate of the machine tool to gradually remove excess material from the inner diameter of the pipe. Closely monitor the cutting status of the tool and the fixing of the pipe, and adjust the cutting parameters in time.

[0024] In a preferred embodiment, the inner diameter finishing is to select a finishing tool according to the inner diameter size and surface quality after rough machining, and the finishing tool includes a finishing reamer or a grinder. The machine tool is turned on, and the position of the tool is adjusted so that it gradually enters the inner diameter of the pipe for finishing. The cutting speed and feed rate of the machine tool are controlled, a small amount of material is gradually removed, and the cutting state of the tool and the fixing condition of the pipe are closely monitored.

[0025] In a preferred embodiment, the end replacement and repeated processing are as follows: after the processing is completed, the machine tool is turned off, the tool is waited for to stop completely, the fixture is removed to avoid damaging the processed inner wall, and the status of the fixture is checked to ensure that it is intact, the pipe is turned over, the fixture is inserted into the inner diameter of the other end of the pipe, the fixture is adjusted to expand and firmly fixed on the inner wall of the pipe, the clamping device of the machine tool is adjusted to firmly fix the other end of the pipe, and steps 2 to 4 are repeated for rough processing and fine processing. The inner diameter of the other end is processed to the design size and surface quality, and the center lines of the inner diameters at both ends are measured and aligned using a laser aligner or an internal diameter micrometer to reduce the deviation after processing at both ends.

[0026] In a preferred solution, the inner diameter connection processing at both ends is to reinstall the pipe fitting on the machine tool, ensure that the inner diameter center lines at both ends are aligned, select a long tool suitable for the connection processing, the long tool includes a long inner diameter reamer or an inner hole boring tool, turn on the machine tool, adjust the position of the tool, so that it gradually enters the inner diameter of the pipe fitting for connection processing, control the cutting speed and feed rate of the machine tool, closely monitor the cutting state of the tool and the fixing condition of the pipe fitting during the processing, and adjust the cutting parameters in time.

[0027] In a preferred embodiment, the inner diameter and levelness detection is to use an inner diameter micrometer or an inner diameter measuring instrument to accurately measure the inner diameter after processing, insert the measuring tool into the inner diameter of the pipe fitting, record and calibrate the measurement data, and calculate the inner diameter deviation;

[0028] ΔD=Dactual-Ddesign;

[0029] Use a level meter or surface roughness meter to inspect the inner diameter processing quality and end surface levelness of the pipe fittings. Place the measuring tool on the inner wall or end surface of the pipe fittings, record and analyze the measurement data, and calculate the levelness deviation.

[0030] Δh=hactual-hdesign.

[0031] In a preferred embodiment, the adjustment and correction is to analyze the conformity of the inner diameter size and the end face flatness according to the test results, find out the part with larger deviation, formulate a correction plan according to the deviation, determine the part to be corrected and the correction method, select the tool or grinder, perform correction processing on the part with deviation, perform necessary correction processing according to the correction plan, and after the correction processing is completed, re-test the inner diameter and levelness.

[0032] In a preferred embodiment, the disassembly and cleaning is to shut down the machine tool after processing, wait for the tool to stop completely, remove the fixture to avoid damaging the inner wall of the processed pipe, clean the inside and outside of the processed pipe, and remove the chips and residues generated during the processing.

[0033] The technical effects achieved by the present invention are:

[0034] Through the combination of rough machining and fine machining, high dimensional accuracy and excellent surface quality of the inner diameter of the pipe fittings are achieved. At the same time, the inner diameter and levelness are tested during the machining process to ensure that the machining quality meets the design requirements.

[0035] Specially designed fixtures ensure the stability of pipes during processing, reduce vibration and errors, and ensure the continuity and stability of the processing. Through full-process monitoring, cutting parameters can be adjusted in time to avoid unexpected situations during processing.

[0036] Reasonable processing steps and parameter settings improve processing efficiency and reduce processing time. End replacement and repeated processing steps ensure the consistency and connectivity of the inner diameters at both ends, improving the overall processing quality.

[0037] Adjustable expansion fixtures are designed and manufactured according to the size and shape of the pipe fittings to accommodate pipe fittings of different specifications. The disassembly and cleaning steps after processing ensure that the inside and outside of the pipe fittings are clean to avoid secondary contamination and damage to the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of a method for processing the inner diameter of a precision equipment pipe fitting according to the present invention. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0040] See also Figure 1 As shown, the present invention provides a method for processing the inner diameter of a precision equipment pipe fitting, and the method for processing the inner diameter of the pipe fitting comprises the following steps:

[0041] Step 1. Fixture design and production;

[0042] Step 2. Fix the pipe fittings;

[0043] Step 3. Rough machining of inner diameter;

[0044] Step 4. Inner diameter finishing;

[0045] Step 5. End replacement and repeated processing;

[0046] Step 6. Process the inner diameters of both ends to connect;

[0047] Step 7. Inner diameter and levelness detection;

[0048] Step 8. Adjustment and correction;

[0049] Step 9. Disassembly and cleanup.

[0050] The design and production of the fixture is based on the size and shape of the pipe fittings, as well as the specific requirements of the inner diameter processing. The design requirements are analyzed, and the functions that the fixture needs to have are determined, including firm fixation and adjustable expansion. The drawings of the fixture are designed. According to the design drawings, the various parts of the fixture are processed using precision machine tools. The processed parts are assembled and functional tests are performed. The fixture is stably expanded and fixed inside the pipe fitting. According to the test results, the fixture is adjusted and optimized.

[0051] To fix the pipe fittings, place the pipe fittings to be processed on the workbench, insert the prepared fixture into the inner diameter of one end of the pipe fittings, adjust the fixture to expand it and firmly fix it on the inner wall of the pipe fittings, adjust the clamping device of the machine tool according to the size of the pipe fittings and processing requirements, and install the pipe fittings with the fixture fixed at the processing position of the machine tool.

[0052] The inner diameter rough machining is to select appropriate rough machining tools according to the size and material of the inner diameter of the pipe fitting. The rough machining tool is an inner diameter turning tool or a reamer, and the cutting speed v_c and the feed rate f are set;

[0053] v_c=π·D·n;

[0054] Where D is the tool diameter, n is the spindle speed;

[0055] f = v_f·n;

[0056] Among them, v_f is the feed per revolution;

[0057] Turn on the machine tool and adjust the tool position so that it gradually enters the inner diameter of the pipe for cutting. Control the cutting speed and feed rate of the machine tool to gradually remove excess material from the inner diameter of the pipe. Closely monitor the cutting status of the tool and the fixing of the pipe, and adjust the cutting parameters in time.

[0058] The inner diameter finishing is to select finishing tools according to the inner diameter size and surface quality after rough machining. The finishing tools include fine reamers or grinders. Turn on the machine tool, adjust the position of the tool, and gradually enter the inner diameter of the pipe for finishing. Control the cutting speed and feed rate of the machine tool, gradually remove a small amount of material, and closely monitor the cutting status of the tool and the fixing of the pipe.

[0059] End replacement and repeat processing: After the processing is completed, turn off the machine tool, wait for the tool to stop completely, remove the fixture to avoid damaging the processed inner wall, and check the status of the fixture to ensure it is intact. Turn the pipe over, insert the fixture into the inner diameter of the other end of the pipe, adjust the fixture to expand and firmly fix it on the inner wall of the pipe, adjust the clamping device of the machine tool to firmly fix the other end of the pipe, repeat steps 2 to 4 for rough processing and fine processing, and process the inner diameter of the other end to the design size and surface quality. Use a laser aligner or internal diameter micrometer to measure the center line of the inner diameter at both ends to align and reduce the deviation after processing at both ends.

[0060] The inner diameter connection processing at both ends is to reinstall the pipe fittings on the machine tool, ensure that the inner diameter center lines at both ends are aligned, select long tools suitable for connection processing, long tools include long inner diameter reamers or inner hole boring tools, turn on the machine tool, adjust the tool position, so that it gradually enters the inner diameter of the pipe fitting for connection processing, control the cutting speed and feed rate of the machine tool, closely monitor the cutting status of the tool and the fixing condition of the pipe fitting during the processing, and adjust the cutting parameters in time.

[0061] The inner diameter and levelness detection is to use an inner diameter micrometer or an inner diameter measuring instrument to accurately measure the inner diameter after processing, insert the measuring tool into the inner diameter of the pipe fitting, record and calibrate the measurement data, and calculate the inner diameter deviation;

[0062] ΔD=Dactual-Ddesign;

[0063] Use a level meter or surface roughness meter to inspect the inner diameter processing quality and end surface levelness of the pipe fittings. Place the measuring tool on the inner wall or end surface of the pipe fittings, record and analyze the measurement data, and calculate the levelness deviation.

[0064] Δh=hactual-hdesign.

[0065] Adjustment and correction are to analyze the conformity of the inner diameter size and end face flatness according to the test results, find out the parts with larger deviations, formulate correction plans according to the deviations, determine the parts that need to be corrected and the correction methods, select tools or grinders, perform correction processing on the parts with deviations, perform necessary correction processing according to the correction plan, and re-test the inner diameter and levelness after the correction processing is completed.

[0066] After the processing is completed, the machine tool is turned off and the tool is waited for to stop completely. The fixture is removed to avoid damaging the inner wall of the processed pipe fittings. The inside and outside of the processed pipe fittings are cleaned to remove the chips and residues generated during the processing.

[0067] In the present invention, high dimensional accuracy and excellent surface quality of the inner diameter of the pipe fitting are achieved by combining rough machining and fine machining. At the same time, the inner diameter and levelness detection are carried out during the machining process to ensure that the machining quality meets the design requirements. The specially designed fixture ensures the stability of the pipe fitting during machining, reduces vibration and errors, and ensures the continuity and stability of the machining process. The cutting parameters are adjusted in time through full-process monitoring to avoid unexpected situations during machining. Reasonable machining steps and parameter settings improve machining efficiency and reduce machining time. End replacement and repeated machining steps ensure the consistency and connectivity of the inner diameters at both ends and improve the overall machining quality. An adjustable expansion fixture is designed and manufactured according to the size and shape of the pipe fitting to adapt to pipe fittings of different specifications. The disassembly and cleaning steps after machining ensure that the inside and outside of the pipe fitting are clean to avoid secondary pollution and damage to the finished product.

[0068] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A method for processing the inner diameter of a precision equipment pipe, characterized in that: The pipe inner diameter processing method comprises the following steps: Step 1. Fixture design and production; Step 2. Fix the pipe fittings; Step 3. Rough machining of inner diameter; Step 4. Inner diameter finishing; Step 5. End replacement and repeated processing; Step 6. Process the inner diameters of both ends to connect; Step 7. Inner diameter and levelness detection; Step 8. Adjustment and correction; Step 9. Disassembly and cleanup.

2. A method for processing the inner diameter of a precision equipment pipe according to claim 1, characterized in that: The fixture is designed and manufactured according to the size and shape of the pipe fitting, as well as the specific requirements of the inner diameter processing, and the design requirements are analyzed to determine the functions that the fixture needs to have, including firm fixation and adjustable expansion. Drawings of the fixture are designed, and the various parts of the fixture are processed using precision machine tools according to the design drawings. The processed parts are assembled and functional tests are performed. The fixture is stably expanded and fixed inside the pipe fitting, and the fixture is adjusted and optimized according to the test results.

3. A method for processing the inner diameter of a precision equipment pipe according to claim 1, characterized in that: The method of fixing the pipe fittings is to place the pipe fittings to be processed on a workbench, insert a prepared fixture into the inner diameter of one end of the pipe fitting, adjust the fixture to expand it and firmly fix it on the inner wall of the pipe fitting, adjust the clamping device of the machine tool according to the size of the pipe fitting and the processing requirements, and install the pipe fittings with the fixture fixed at the processing position of the machine tool.

4. A method for processing the inner diameter of a precision equipment pipe according to claim 1, characterized in that: The inner diameter rough machining is to select an appropriate rough machining tool according to the size and material of the inner diameter of the pipe fitting, the rough machining tool is an inner diameter turning tool or a reamer, set the cutting speed v_c, and set the feed rate f; v_c=π·D·n; Where D is the tool diameter, n is the spindle speed; f = v_f·n; Among them, v_f is the feed per revolution; Turn on the machine tool and adjust the tool position so that it gradually enters the inner diameter of the pipe for cutting. Control the cutting speed and feed rate of the machine tool to gradually remove excess material from the inner diameter of the pipe. Closely monitor the cutting status of the tool and the fixing of the pipe, and adjust the cutting parameters in time.

5. A method for processing the inner diameter of a precision equipment pipe according to claim 1, characterized in that: The inner diameter finishing is to select finishing tools according to the inner diameter size and surface quality after rough machining. The finishing tools include fine reamer or grinder. The machine tool is turned on and the tool position is adjusted so that it gradually enters the inner diameter of the pipe for finishing. The cutting speed and feed rate of the machine tool are controlled to gradually remove a small amount of material and closely monitor the cutting status of the tool and the fixing condition of the pipe.

6. A method for processing the inner diameter of a precision equipment pipe according to claim 1, characterized in that: The end replacement and repeated processing are as follows: after the processing is completed, the machine tool is turned off, the tool is waited for to stop completely, the fixture is removed to avoid damaging the processed inner wall, and the status of the fixture is checked to ensure that it is intact. The pipe fitting is turned over, the fixture is inserted into the inner diameter of the other end of the pipe fitting, the fixture is adjusted to expand and firmly fixed on the inner wall of the pipe fitting, the clamping device of the machine tool is adjusted to firmly fix the other end of the pipe fitting, and steps 2 to 4 are repeated for rough processing and fine processing. The inner diameter of the other end is processed to the design size and surface quality, and the center lines of the inner diameters at both ends are measured and aligned using a laser aligner or an internal diameter micrometer to reduce the deviation after processing at both ends.

7. A method for processing the inner diameter of a precision equipment pipe according to claim 1, characterized in that: The inner diameter connection processing at both ends is to reinstall the pipe fittings on the machine tool, ensure that the inner diameter center lines at both ends are aligned, select a long tool suitable for the connection processing, the long tool includes a long inner diameter reamer or an inner hole boring tool, turn on the machine tool, adjust the position of the tool, so that it gradually enters the inner diameter of the pipe fitting for connection processing, control the cutting speed and feed rate of the machine tool, closely monitor the cutting state of the tool and the fixing condition of the pipe fitting during the processing, and adjust the cutting parameters in time.

8. A method for processing the inner diameter of a precision equipment pipe according to claim 1, characterized in that: The inner diameter and levelness detection is to use an inner diameter micrometer or an inner diameter measuring instrument to accurately measure the inner diameter after processing, insert the measuring tool into the inner diameter of the pipe fitting, record and calibrate the measurement data, and calculate the inner diameter deviation; ΔD=Dactual-Ddesign; Use a level meter or surface roughness meter to check the inner diameter processing quality and end surface levelness of the pipe fittings. Place the measuring tool on the inner wall or end surface of the pipe fittings, record and analyze the measurement data, and calculate the levelness deviation. Δh=hactual-hdesign.

9. A method for processing the inner diameter of a precision equipment pipe according to claim 1, characterized in that: The adjustment and correction described is to analyze the conformity of the inner diameter size and the end face flatness according to the test results, find out the part with larger deviation, formulate a correction plan according to the deviation, determine the part to be corrected and the correction method, select the tool or grinder, perform correction processing on the part with deviation, perform necessary correction processing according to the correction plan, and re-test the inner diameter and levelness after the correction processing is completed.

10. A method for processing the inner diameter of a precision equipment pipe according to claim 1, characterized in that: The disassembly and cleaning are as follows: after the processing is completed, the machine tool is turned off, the tool is waited for to stop completely, the fixture is disassembled to avoid damaging the inner wall of the processed pipe fitting, the inside and outside of the processed pipe fitting are cleaned, and the chips and residues generated during the processing are removed.

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