Grinding, polishing and detecting method for inner surface of metal capillary tube

Abstract

The invention relates to the technical field of grinding and polishing processing, and discloses a metal capillary inner surface grinding, polishing and detecting method, which comprises the following steps: S1, cleaning, crushing, screening and cleaning walnut shells serving as raw materials of grinding materials, and removing residual impurities and dust; s2, crushing and grinding the walnut skin raw material obtained in the step S1, and grinding the crushed walnut skin into a powdery grinding material in a staged temperature control grinding manner; and S3, the primary walnut skin powder obtained in the step S2 is subjected to low-temperature freezing forming through liquid nitrogen, so that the powdery grinding material is of a blocky structure, then the walnut skin powder is ground again through low-speed fine grinding equipment, and the grinding material is finer. The walnut skin is used as the raw material, polishing and grinding are conducted through multiple times of grinding and smashing, the use cost is reduced, the grinding degree of the walnut skin powder is guaranteed in a multi-stage grinding cooperation mode, meanwhile, the grinding temperature is controlled, and the grinding quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding and polishing processing, and specifically relates to a method for inner surface grinding, polishing and detection of a metal capillary tube. Background Art

[0002] A metal capillary tube is a thin tube made of a metal material and has the characteristic of capillary action. The diameter of the tube is usually very small. When producing a metal capillary tube, the inner wall of the tube will be ground and polished. Existing metal capillary tube polishing mostly uses emery for grinding. Emery needs to be imported from abroad, and the usage cost is very high. Moreover, due to the small diameter of the metal capillary tube, the grinding and polishing equipment cannot thoroughly grind the inner wall surface of the metal capillary tube, and the grinding effect is poor.

[0003] In view of this, in-depth research on the above problems has led to the generation of this case. Summary of the Invention

[0004] To solve the above technical problems, the present invention is achieved through the following technical solutions: A method for inner surface grinding, polishing and detection of a metal capillary tube, including the following steps:

[0005] Step S1: Clean and crush the raw material of the abrasive, walnut shell. After cleaning and crushing, screen and clean the crushed raw material to remove residual impurities and dust.

[0006] Step S2: Crush and grind the walnut shell raw material obtained in Step S1. Grind the crushed walnut shell into a powdery abrasive by means of staged temperature-controlled grinding.

[0007] Step S3: Use liquid nitrogen to freeze the primary walnut shell powder obtained in Step S2 at a low temperature to form a block structure of the powdery abrasive by means of low-temperature quick-freezing. Then use a low-speed fine grinding device to grind the walnut shell powder again to make the abrasive finer.

[0008] Step S4: Feed the abrasive obtained in Step S3 by means of electromagnetic pressure and air pressure airflow, and achieve rough grinding by contacting the abrasive with the inner wall of the metal capillary tube.

[0009] Step S5: Use the method of rotating air pressure powder spraying to polish the inner wall surface of the metal capillary tube that has been roughly ground in Step S4. Make the walnut shell powder spray out in a spiral shape by rotation to increase the contact with the metal capillary tube and achieve fine grinding processing.

[0010] Step S6: Clean the metal capillary after grinding in step S5. Before cleaning, filter and purify the water used for cleaning to prevent impurities in the water from damaging the metal capillary. At the same time, perform adjustable flushing according to different cleaning situations to ensure the cleanliness of the metal capillary;

[0011] Step S7: Dry the polished metal capillary by means of high-temperature hot air. After drying, use a polishing detector to detect the polishing effect.

[0012] Preferably, the stage-controlled temperature grinding method in step S2 is to perform stage grinding in small amounts and multiple times for rapid grinding, reducing the grinding time of the walnut shell powder, preventing the temperature from rising, and using a temperature monitoring sensor to measure the temperature of the grinding chamber in real time. When the temperature rises due to grinding, cool the grinding chamber by inputting cold air to prevent the walnut shell powder from deteriorating due to the temperature rise.

[0013] Preferably, the low-temperature freezing grinding method in step S3 is specifically as follows: Put the walnut shell powder obtained by rough grinding in step S2 into a conical forming mold, and perform rapid freezing and forming through the ultra-low temperature of liquid nitrogen to freeze the roughly ground walnut shell powder into blocks. Then use a low-speed fine grinding device to finely grind the frozen walnut shell powder blocks to obtain the abrasive for polishing.

[0014] Preferably, the rough grinding method in step S4 is specifically as follows: Put the abrasive into the storage bucket, lift the abrasive upward by magnetic attraction for abrasive feeding, and at the same time fix the metal capillary to be polished by electromagnetic fixation. Inject the abrasive into the metal capillary, and the abrasive moves in the metal capillary and rubs against the inner wall of the metal capillary to polish the inner wall. The electromagnetic feeding is at a fixed rate. When the feeding rate needs to be adjusted, the feeding speed of the abrasive can be adjusted by adjusting the size of the air pressure and airflow, and the grinding rate can be adjusted.

[0015] Preferably, the fine grinding and processing method in step S5 is specifically as follows: The abrasive is transported by air pressure drive. The abrasive is ejected through a powder spraying head with a spiral groove opened inside that can rotate. The rotation of the powder spraying head itself and the spiral groove inside can make the abrasive eject in a spiral shape. Compared with the abrasive ejected in a straight line, the contact with the inner wall of the metal capillary can be greatly increased, ensuring the grinding and polishing effect and achieving the purpose of fine grinding.

[0016] Preferably, the cleaning method in step S6 is specifically as follows: Purify the water used for cleaning by means of activated carbon adsorption and filtration, and then spray it out under pressure. When spraying out, adjust the spraying pressure by using different water outlets to suit different cleaning situations.

[0017] Preferably, 10 g of walnut shell powder is filled into a conical forming mold as a unit for freeze forming.

[0018] Preferably, when performing fine grinding by powder spraying, the metal capillary and the powder spraying head rotate synchronously.

[0019] Preferably, the single - feeding grinding time in the stage grinding described in step S2 is controlled within 5 s - 10 s to prevent the walnut shell powder from deteriorating due to high temperature.

[0020] Preferably, the abrasive is recycled and reused after being used for polishing. The abrasive is walnut shell powder, which is an organic matter. When it cannot be recycled and reused, it can be used as organic fertilizer.

[0021] Beneficial effects

[0022] The present invention provides a method for grinding, polishing and detecting the inner surface of a metal capillary. Using walnut shell as raw material, the production of polishing abrasive is carried out through multiple grinding and pulverization, reducing the use cost. By means of multi - stage grinding cooperation, the grinding degree of walnut shell powder is ensured. At the same time, the grinding temperature is controlled to prevent the abrasive from deteriorating due to high temperature and ensure the quality of the abrasive. The obtained abrasive is used to polish the metal capillary. Similarly, a multi - stage polishing method is adopted to ensure the polishing effect. First, mobile contact polishing is used for primary rough polishing, and then secondary fine polishing of the inner surface is carried out by means of rotary powder spraying to ensure the polishing effect. After polishing, the metal capillary is cleaned to ensure the cleanliness of the metal capillary and prevent affecting the detection result. Brief description of the drawings

[0023] Figure 1 It is the main sectional view structural schematic diagram of the low - temperature staged grinding device for walnut shell powder of the method for grinding, polishing and detecting the inner surface of a metal capillary described in the present invention.

[0024] Figure 2 It is the main sectional view partial enlarged structural schematic diagram of the low - temperature staged grinding device for walnut shell powder of the method for grinding, polishing and detecting the inner surface of a metal capillary described in the present invention.

[0025] Figure 3 It is the three - dimensional structural schematic diagram of the lower grinding disc of the low - temperature staged grinding device for walnut shell powder of the method for grinding, polishing and detecting the inner surface of a metal capillary described in the present invention.

[0026] Figure 4 It is the main sectional view structural schematic diagram of the liquid nitrogen low - temperature quick - freezing and grinding device for walnut shell powder of the method for grinding, polishing and detecting the inner surface of a metal capillary described in the present invention.

[0027] Figure 5Schematic diagram of the partial enlarged main cross-sectional view of the walnut shell powder liquid nitrogen cryogenic quick-freezing and grinding device for the method of grinding, polishing and detecting the inner surface of a metal capillary tube according to the present invention.

[0028] Figure 6 Schematic diagram of the three-dimensional structure of the forming die of the walnut shell powder liquid nitrogen cryogenic quick-freezing and grinding device for the method of grinding, polishing and detecting the inner surface of a metal capillary tube according to the present invention.

[0029] Figure 7 Schematic diagram of the top view structure of the forming die of the walnut shell powder liquid nitrogen cryogenic quick-freezing and grinding device for the method of grinding, polishing and detecting the inner surface of a metal capillary tube according to the present invention.

[0030] Figure 8 Schematic diagram of the main cross-sectional view of the magnetic rough grinding and polishing device for the inner surface of a metal capillary tube for the method of grinding, polishing and detecting the inner surface of a metal capillary tube according to the present invention.

[0031] Figure 9 Schematic diagram of the partial enlarged main cross-sectional view of the magnetic rough grinding and polishing device for the inner surface of a metal capillary tube for the method of grinding, polishing and detecting the inner surface of a metal capillary tube according to the present invention.

[0032] Figure 10 Schematic diagram of the main cross-sectional view of the electromagnetic fixing component of the magnetic rough grinding and polishing device for the inner surface of a metal capillary tube for the method of grinding, polishing and detecting the inner surface of a metal capillary tube according to the present invention.

[0033] Figure 11 Schematic diagram of the main cross-sectional view of the rotary powder spraying fine grinding device for the inner surface of a metal capillary tube for the method of grinding, polishing and detecting the inner surface of a metal capillary tube according to the present invention.

[0034] Figure 12 Schematic diagram of the main view of the rotary powder spraying fine grinding device for the inner surface of a metal capillary tube for the method of grinding, polishing and detecting the inner surface of a metal capillary tube according to the present invention.

[0035] Figure 13 Schematic diagram of the three-dimensional structure of the rotary fixing component of the rotary powder spraying fine grinding device for the inner surface of a metal capillary tube for the method of grinding, polishing and detecting the inner surface of a metal capillary tube according to the present invention.

[0036] Figure 14 Schematic diagram of the main cross-sectional view of the inner surface flushing device for a metal capillary tube for the method of grinding, polishing and detecting the inner surface of a metal capillary tube according to the present invention.

[0037] Figure 15 Schematic diagram of the main view of the inner surface flushing device for a metal capillary tube for the method of grinding, polishing and detecting the inner surface of a metal capillary tube according to the present invention.

[0038] Figure 16 Schematic structural diagram of the fixing bolt of the inner surface flushing device of the metal capillary for the inner surface grinding, polishing and detection method of the metal capillary of the present invention.

[0039] Figure 17 Schematic enlarged structural diagram of the connecting block of the inner surface flushing device of the metal capillary for the inner surface grinding, polishing and detection method of the metal capillary of the present invention.

[0040] In the figure: E1 - fixed bracket; E2 - crushing box; E3 - lower grinding disc; E4 - material receiving trough; E5 - storage bin; E6 - drive bracket; E7 - fixed seat; E8 - gear reducer; E9 - drive motor; E10 - grinding rotating shaft; E11 - upper grinding disc; E12 - feed pipe; E13 - feeding hopper; E14 - support fixing block; E15 - overflow trough; E16 - support rod; E17 - adapter pipe; E18 - temperature monitoring sensor; E19 - compression refrigerator; E20 - gas delivery pump; E21 - gas delivery bellows; D1 - equipment mounting plate; D2 - equipment drive mounting frame; D3 - sealed tank; D4 - freezing chamber; D5 - vacuum insulation chamber; D6 - freezing bracket; D7 - forming die; D8 - sealing cover; D9 - exhaust hole; D10 - lifting block; D11 - grinding table; D12 - blower; D13 - air blowing pipe; D14 - mounting seat; D15 - air blowing frame; D16 - drive mounting frame; D17 - elbow grinder; D18 - powder baffle; D19 - vibrating filter screen; D20 - conveying and drying belt; D21 - locking pin; D22 - dust-proof air inlet hopper; A1 - equipment base; A2 - storage barrel; A3 - powder storage chamber; A4 - powder replenishing port; A5 - first electromagnet coil; A6 - sliding frame; A7 - lifting frame; A8 - moving lower magnet; A9 - air pressure pump; A10 - air delivery pipe; A11 - portal bracket; A12 - material delivery pipe; A13 - first powder outlet hopper; A14 - auxiliary powder outlet pipe; A15 - second powder outlet hopper; A16 - compressed air pump; A17 - anti-blocking air inlet pipe; A18 - switch valve; A19 - blanking pipe; A20 - grinding fixing table; A21 - recycling box; A22 - sealing thread; A23 - solenoid valve; A24 - blockage pressure sensor; A25 - fixed housing; A26 - mounting cavity; A27 - second electromagnet coil; A28 - fixed elastic sheet; B1 - equipment support; B2 - powder storage box; B3 - powder chamber; B4 - powder inlet; B5 - air compressor pump; B6 - air inlet connecting pipe; B7 - support frame; B8 - pressurizing pipe; B9 - pressurized air blowing pipe; B10 - shaft fixing block; B11 - rotating shaft; B12 - stirring frame; B13 - grinding box; B14 - conveying pipe; B15 - powder inlet hopper; B16 - rotating connecting pipe head; B17 - spiral powder spraying head; B18 - waste box; B19 - tightening thread; B20 - first rotary bearing; B21 - connecting rod; B22 - observation window; B23 - fixing rod; B24 - outer support sleeve; B25 - second rotary bearing; B26 - inner rotary sleeve; B27 - rubber support ring; C1 - fixed base; C2 - cleaning box; C3 - drainage grid; C4 - cleaning chamber; C5 - waste water chamber; C6 - mounting bracket; C7 - electric rotating seat; C8 - cleaning fixing grid; C9 - water tank; C10 - mounting plate; C11 - conveying pump; C12 - water suction pipe; C13 - connecting pipe; C14 - activated carbon filter box; C15 - water delivery pipe; C16 - booster pump; C17 - booster pipe; C18 - switch control valve; C19 - observation box door;C20 - Fixed bolt; C21 - Support base; C22 - Sliding rod frame; C23 - Water outlet connection block; C24 - Sliding sleeve; C25 - Main water outlet; C26 - Micro water outlet; C27 - Fixed frame; C28 - Hydraulic push rod; C29 - Connection block. Detailed implementation method

[0041] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Embodiment: Please refer to Figure 1-17 ;

[0043] A method for grinding, polishing and detecting the inner surface of a metal capillary tube, comprising the following steps:

[0044] Step S1: Clean and crush the raw material of the abrasive, walnut shell. After cleaning and crushing, screen and clean the crushed raw material to remove the remaining impurities and dust.

[0045] Step S2: Crush and grind the walnut shell raw material obtained in step S1. Grind the crushed walnut shell into powdery abrasive by means of staged temperature-controlled grinding.

[0046] Step S3: Use liquid nitrogen to freeze the primary walnut shell powder obtained in step S2 at low temperature to form a block structure of the powdery abrasive by means of low-temperature quick-freezing. Then use a low-speed fine grinding device to grind the walnut shell powder again to make the abrasive finer.

[0047] Step S4: Feed the abrasive obtained in step S3 by means of electromagnetic pressure and wind pressure airflow, and realize rough grinding by contacting the inner wall of the metal capillary tube with the abrasive.

[0048] Step S5: Use the method of rotating air pressure powder spraying to polish the inner wall surface of the metal capillary tube that has been roughly ground in step S4. Make the walnut shell powder spray out in a spiral shape by rotation to increase the contact with the metal capillary tube and realize fine grinding processing.

[0049] Step S6: Clean the metal capillary tube after polishing in step S5. Filter and purify the water used for cleaning before cleaning to prevent impurities in the water from damaging the metal capillary tube. At the same time, perform adjustable flushing according to different cleaning situations to ensure the cleanliness of the metal capillary tube.

[0050] Step S7: Dry the polished metal capillary tube by means of high-temperature hot air. After drying, use a polishing detector to detect the polishing effect.

[0051] In the specific implementation process, further, the way of staged temperature-controlled grinding in step S2 is to perform staged grinding in small amounts and multiple times for rapid grinding, reducing the grinding time of walnut peel powder, preventing the temperature from rising, and measuring the temperature of the grinding chamber in real time through a temperature monitoring sensor. When the temperature rises due to grinding, the grinding chamber is cooled by inputting cold air to prevent the walnut peel powder from deteriorating due to temperature rise;

[0052] A monitoring type low-temperature grinding structure is used. The walnut peel is crushed and ground by means of driving grinding, and the grinding temperature is monitored in real time during grinding. When the temperature is too high, cooling is carried out to prevent the increase of the grinding temperature from affecting the quality of the walnut peel powder;

[0053] It should be noted that a low-temperature staged grinding device for walnut peel powder is used during the coarse crushing of walnut peel, including: a fixed bracket E1, and a monitoring type low-temperature grinding structure is installed on the fixed bracket E1;

[0054] The monitoring type low-temperature grinding structure includes: a crushing box E2, a lower grinding disc E3, a material receiving trough E4, a material bin E5, a driving bracket E6, a pair of fixed seats E7, a gear reducer E8, a driving motor E9, a grinding rotating shaft E10, an upper grinding disc E11, a feed pipe E12, a feeding hopper E13, and a monitoring and cooling component;

[0055] The crushing box E2 is installed at the right position on the upper wall surface of the fixed bracket E1. The lower grinding disc E3 is installed inside the crushing box E2. The material receiving trough E4 is installed below the lower grinding disc E3. The material bin E5 is installed at the middle position of the fixed bracket E1. The driving bracket E6 is installed on the fixed bracket E1. A pair of fixed seats E7 are installed on the upper wall surface of the driving bracket E6. The gear reducer E8 is installed on the pair of fixed seats E7. The driving motor E9 is installed on the gear reducer E8. The grinding rotating shaft E10 passes through the driving bracket E6 and is installed on the output end of the gear reducer E8. The upper grinding disc E11 is installed on the grinding rotating shaft E10. The feed pipe E12 is installed on the outer wall surface of the grinding rotating shaft E10. The lower end of the feed pipe E12 penetrates and is embedded on the upper grinding disc E11. The feeding hopper E13 is installed at the upper end of the feed pipe E12. The monitoring and cooling component is installed on the fixed bracket E1 and the crushing box E2;

[0056] The lower grinding disc E3 is installed inside the crushing box E2 through a support fixing block E14; a number of overflow grooves E15 are provided on the lower grinding disc E3; the material receiving trough E4 is installed and fixed through a support rod E16; the material bin E5 is connected to the crushing box E2 through a transfer pipe E17;

[0057] The monitoring and cooling component includes: a temperature monitoring sensor E18, a compression type refrigerator E19, an air delivery pump E20, and an air delivery bellows E21;

[0058] The temperature monitoring sensor E18 is embedded on the inner wall surface of the crushing box E2. The compression refrigerator E19 is installed at the left position of the crushing box E2. The air delivery pump E20 is installed on the compression refrigerator E19. The air delivery pump E20 is connected to the air outlet of the compression refrigerator E19. One end of the air delivery bellows E21 is installed on the air delivery pump E20, and the other end of the air delivery bellows E21 is installed on the air inlet of the crushing box E2;

[0059] The fixed bracket E1 is used to support the entire device. When using the monitoring type low-temperature grinding structure for grinding processing, the walnut peel to be ground is put into the feeding hopper E13. The walnut peel falls through the feeding pipe E12 to the middle position between the upper grinding disc E11 and the lower grinding disc E3 located in the crushing box E2 to achieve grinding feeding. The controller matching the device is manipulated to start the device. The driving bracket E6 is installed on the fixed bracket E1, and the fixed seat E7 is installed on the upper wall surface of the driving bracket E6. The device controller issues a control electrical signal to control the driving motor E9 connected to the gear reducer E8 to start rotating. The rotation of the driving motor E9 drives the gear reducer E8 installed on the fixed seat E7 connected to it. The gear reducer E8 converts the high-speed rotation on the input shaft into a low-speed and high-torque rotation on the output shaft through the meshing between the internal gears, thereby slowing down the rotation speed output by the driving motor E9. The output end of the gear reducer E8 drives the grinding rotating shaft E10 to rotate. The rotation of the grinding rotating shaft E10 drives the upper grinding disc E11 to rotate and cooperate with the lower grinding disc E3 installed in the crushing box E2 through the supporting fixed block E14. The crushing and grinding of the walnut peel are realized through the grinding grooves arranged on the upper grinding disc E11 and the lower grinding disc E3.

[0060] In the specific implementation process, further, the low-temperature freezing and grinding method described in step S3 is specifically: putting the walnut peel powder obtained by rough grinding in step S2 into a conical forming mold, and quickly freezing and forming it through the ultra-low temperature of liquid nitrogen, freezing the rough-ground walnut peel powder into blocks, and then using a low-speed fine grinding device to finely grind the frozen walnut peel powder blocks to obtain the abrasive for polishing;

[0061] The method of combining the low-temperature quick-freezing forming structure and the grinding and screening structure is adopted. The preliminary crushed walnut peel powder is quickly frozen and formed through the low temperature of liquid nitrogen, and then the formed walnut peel powder is ground twice by the grinding device. Due to the use of the low-temperature quick-freezing method, the subsequent grinding temperature can be effectively prevented from rising, and the walnut peel powder can be effectively prevented from deteriorating due to the temperature rise;

[0062] It should be noted that a walnut peel powder liquid nitrogen cryogenic quick-freezing and grinding device is used for the secondary fine grinding of walnut peel powder, including: an equipment installation plate D1 and an equipment drive installation frame D2. The equipment drive installation frame D2 is installed on the equipment installation plate D1. A liquid nitrogen cryogenic freezing structure is installed on the equipment installation plate D1, and a grinding, screening and conveying structure is installed on the equipment drive installation frame D2 and the equipment installation plate D1;

[0063] The liquid nitrogen cryogenic freezing structure includes: a sealed tank D3, a freezing chamber D4, a vacuum heat preservation chamber D5, a freezing bracket D6, a number of forming molds D7 and a sealing cover D8;

[0064] The sealed tank D3 is installed at the left position on the equipment installation plate D1. The freezing chamber D4 is opened inside the sealed tank D3. The vacuum heat preservation chamber D5 is opened inside the wall of the sealed tank D3. The freezing bracket D6 is installed at the middle position on the inner wall surface of the freezing chamber D4. A number of forming molds D7 are embedded on the freezing bracket D6. The sealing cover D8 is installed at the opening position on the sealed tank D3;

[0065] A number of exhaust holes D9 are opened on the forming molds D7; a number of lifting blocks D10 are installed on the forming molds D7;

[0066] The grinding, screening and conveying structure includes: a grinding table D11, a blower D12, a blowing pipe D13, a mounting seat D14, a blowing frame D15, a drive mounting frame D16, an elbow grinder D17, a powder baffle D18, a vibrating filter screen D19 and a conveying and drying belt D20;

[0067] The grinding table D11 is installed on the equipment drive installation frame D2. The blower D12 is installed at the left position of the grinding table D11. One end of the blowing pipe D13 is installed at the air outlet of the blower D12. The mounting seat D14 is installed on the side wall surface of the grinding table D11. The blowing frame D15 is installed on the mounting seat D14. The other end of the blowing pipe D13 is installed on the blowing frame D15. The powder baffle D18 is installed at the right position on the equipment drive installation frame D2. The vibrating filter screen D19 is installed on the grinding table D11 and the powder baffle D18. The conveying and drying belt D20 is installed on the equipment installation plate D1, and the conveying and drying belt D20 is located below the vibrating filter screen D19;

[0068] The blower D12 is installed on the equipment drive installation frame D2 through a locking pin D21; a dust-proof air inlet hopper D22 is installed at the air inlet of the blower D12;

[0069] In the specific implementation process, further, the rough grinding method described in step S4 is specifically as follows: Put the abrasive into the storage bucket, lift the abrasive upward by magnetic attraction for feeding the abrasive, and at the same time fix the metal capillary to be polished by electromagnetic fixation. Inject the abrasive into the metal capillary, and polish the inner wall by the movement of the abrasive in the metal capillary and the friction with the inner wall of the metal capillary. The electromagnetic feeding is at a fixed rate. When the feeding rate needs to be adjusted, the feeding speed of the abrasive can be adjusted by adjusting the size of the air pressure airflow, and the polishing rate can be adjusted;

[0070] Realize the automatic feeding of the abrasive by combining electromagnetic feeding and pneumatic feeding, fix and block the metal capillary by electromagnetic fixation, cooperate with the automatic feeding structure to inject the abrasive into the pipe, and automatically polish the inner surface by the reciprocating movement of the metal capillary;

[0071] It should be noted that when initially rough polishing the metal capillary, a magnetic rough grinding and polishing device for the inner surface of the metal capillary is used, and an adjustable feeding multi-station magnetic grinding structure A is installed on it;

[0072] The adjustable feeding multi-station magnetic grinding structure A includes: equipment base A1, storage bucket A2, powder storage chamber A3, powder replenishing port A4, first electromagnet coil A5, two pairs of sliding frames A6, lifting frame A7, moving lower magnet A8, air pressure pump A9, air delivery pipe A10, gantry bracket A11, material delivery pipe A12, first powder discharge hopper A13, auxiliary powder discharge pipe A14, second powder discharge hopper A15, compressed air pump A16, anti-blocking air inlet pipe A17, switch valve A18, a pair of blanking pipes A19, grinding and fixing table A20, a pair of electromagnetic fixing components and recovery box A21;

[0073] The storage bin A2 is installed at the left position of the equipment base A1. The powder storage cavity A3 is opened inside the storage bin A2. The powder replenishment port A4 is opened on the side wall of the storage bin A2. The first electromagnet coil A5 is installed above the inner part of the powder storage cavity A3. Two pairs of sliding frames A6 are installed on the inner side wall of the powder storage cavity A3. The lifting frame A7 is installed on the two pairs of sliding frames A6. The moving lower magnet A8 is installed on the lifting frame A7. The air pressure pump A9 is installed on the left side of the storage bin A2. One end of the air delivery pipe A10 is installed on the air pressure pump A9, and the other end of the air delivery pipe A10 penetrates and is embedded in the lower wall surface of the powder storage cavity A3. The gantry bracket A11 is installed on the equipment base A1. The material delivery pipe A12 is embedded in the gantry bracket A11. The left end of the material delivery pipe A12 penetrates and extends into the powder storage cavity A3. The first powder discharge hopper A13 is installed on the material delivery pipe A12. One end of the auxiliary powder discharge pipe A14 is connected to the middle position of the material delivery pipe A12. The second powder discharge hopper A15 is installed at the other end of the auxiliary powder discharge pipe A14. The compressed air pump A16 is installed on the right side wall of the storage bin A2. The anti-blocking air inlet pipe A17 is installed at both ends on the compressed air pump A16 and the second powder discharge hopper A15 respectively. The switch valve A18 is installed on the other end of the material delivery pipe A12. A pair of blanking pipes A19 are installed on the discharge port below the switch valve A18. The grinding fixing table A20 is installed on the equipment base A1. A pair of electromagnetic fixing components are installed on the grinding fixing table A20. The recycling box A21 is installed below the grinding fixing table A20; A sealing screw thread A22 is installed on the powder replenishment port A4. An electromagnetic valve A23 is arranged on the air delivery pipe A10. A blockage pressure sensor A24 is installed on the second powder discharge hopper A15;

[0074] One of the pair of electromagnetic fixing components includes: a fixing shell A25, an installation cavity A26, a second electromagnet coil A27 and a fixing spring piece A28;

[0075] The fixing shell A25 is installed on the upper wall surface of the grinding fixing table A20. The installation cavity A26 is opened inside the fixing shell A25. The second electromagnet coil A27 is installed inside the installation cavity A26. The fixing spring piece A28 is located at the middle position of the fixing shell A25;

[0076] When using the adjustable feeding multi-station magnetic grinding structure, the equipment base A1 is used to support the upper equipment. When preparing for grinding, open the sealing screw A22 installed on the powder filling port A4, and put the ground abrasive walnut shell powder into the storage bucket A2 through the powder filling port A4. After the feeding is completed, tighten the sealing screw A22 to ensure the sealing of the storage bucket A2. Control the controller matching the equipment to start the equipment. The first electromagnet coil A5 installed above the inner part of the powder storage cavity A3 is energized and started to generate a magnetic field under the control of the control system. The first electromagnet coil A5 attracts the moving lower magnet A8 installed below on the lifting frame A7 to move upward evenly through the magnetic field. The moving lower magnet A8 moves upward slowly and evenly on the sliding frame A6 through the lifting frame A7, so that the abrasive walnut shell powder enters into the first powder outlet hopper A13 and the second powder outlet hopper A15. The abrasive in the second powder outlet hopper A15 is transported into the material conveying pipe A12 through the auxiliary powder outlet pipe A14 to realize the collection of the abrasive. The abrasive is transported into the material conveying pipe A12 fixed on the gantry bracket A11 through the first powder outlet hopper A13 and the second powder outlet hopper A15. When feeding, the cooperation of the two conical powder outlet hoppers for discharging mainly prevents the abrasive from being blocked due to pressure when entering the hopper opening. The cooperation of the double powder outlet hoppers can share the powder discharging pressure and prevent the abrasive from being blocked. At the same time, the blockage pressure sensor A24 installed on the second powder outlet hopper A15 monitors the pressure at the hopper opening in real time. When it is found that the pressure is too high and blockage may occur, the air compressor A16 installed on the side wall of the storage bucket A2 starts to compress the air to increase the gas pressure to produce high-pressure gas. The high-pressure gas is ejected through the anti-blocking air inlet pipe A17 to blow high-pressure air at the pipe orifice position of the second powder outlet hopper A15, effectively preventing the abrasive from being blocked. When the abrasive inside the storage bucket A2 is used up and needs to be replenished, the controller issues a control signal to change the current direction of the first electromagnet coil A5, so that the first electromagnet coil A5 generates a magnetic field repulsive to the moving lower magnet A8, thereby controlling the moving lower magnet A8 to move downward to the bottom of the powder storage cavity A3 to realize the reset of the moving lower magnet A8. When variable-speed feeding is required, the air pressure pump A9 can cooperate with the air conveying pipe A10 to output high-speed air flow. The solenoid valve A23 embedded on the lower wall surface of the powder storage cavity A3 is opened to make the high-speed air flow enter the inside of the powder storage cavity A3. The abrasive is driven into the first powder outlet hopper A13 and the second powder outlet hopper A15 by the way of driving the abrasive to rise by the air flow. The speed of powder discharging and feeding is adjusted by adjusting the air flow velocity to realize variable-speed discharging. After the abrasive enters the material conveying pipe A12, it is conveyed to the right. Place the lower orifice of the metal capillary tube at the cavity in the middle of the fixed outer shell A25 fixed above the upper wall surface of the grinding fixing table A20, so that the tube wall of the metal capillary tube is in the middle position between the fixed outer shell A25 and the fixed elastic piece A28 installed on the grinding fixing table A20 through the rod bracket. The controller issues a control signal to control the second electromagnet coil A27 installed in the installation cavity A26 to be energized and started to generate a magnetic field.The magnetic field generated by the second electromagnet coil A27 attracts the fixed elastic sheet A28 inside the metal capillary. The strip-shaped metal sheets on both sides of the fixed elastic sheet A28 are magnetically attracted and deformed to abut against the inner wall of the metal capillary, thereby cooperating with the second electromagnet coil A27 to fix the metal capillary. The switching valve A18 is opened, and abrasive is conveyed downward through a pair of feeding pipes A19 so that the abrasive enters the interior of the metal capillary. When the abrasive falls to the bottom of the metal capillary under the action of gravity, it is blocked due to the fixed elastic sheet A28. An electrical signal is sent through the controller to control the current magnitude of the second electromagnet coil A27, thereby adjusting the magnetic field intensity. By changing the magnetic force magnitude of the second electromagnet coil A27, the fixed supporting force on the metal capillary is changed, so that the metal capillary moves downward and gradually penetrates through the through-hole opened in the grinding and fixing table A20. When the metal capillary moves up and down reciprocally, the abrasive is driven by the fixed elastic sheet A28 to move inside the metal capillary to polish the inner wall, thereby achieving the purpose of feeding and polishing through magnetic force. After the polishing is completed, the metal capillary is taken away, and the abrasive will fall into the recycling box A21 installed below the grinding and fixing table A20 to realize the recycling of the abrasive.

[0077] In the specific implementation process, further, the fine grinding processing method described in step S5 is specifically as follows: The abrasive is conveyed by means of air pressure drive. The abrasive is ejected through a powder spraying head with a spiral groove opened inside and capable of rotating. The self-rotation of the powder spraying head in cooperation with the spiral groove inside can make the abrasive ejected in a spiral shape. Compared with the abrasive ejected in a straight line, the contact with the inner wall of the metal capillary can be greatly increased, ensuring the effect of grinding and polishing and achieving the purpose of fine grinding.

[0078] A pressurized ejection type rotary powder spraying and grinding structure is used. The powder is sprayed by means of air pressure transmission. At the same time, when passing through the rotary cavity, the powder spraying head is in a rotating state during operation, so that the ejected abrasive gas flow is in a spiral shape, thereby increasing the contact between the abrasive and the inner pipe wall of the synchronously rotating metal capillary and ensuring the grinding effect.

[0079] It should be noted that when the inner surface of the metal capillary is polished finely for the second time, a device for fine grinding of the inner surface of the metal capillary by rotary powder spraying is used, and a pressurized ejection type rotary powder spraying and grinding structure B is arranged thereon.

[0080] The pressurized ejection type rotary powder spraying and grinding structure B includes: a device support B1, a powder storage box B2, a powder cavity B3, a powder inlet B4, an air compressor B5, a pair of air inlet connecting pipes B6, a pair of support frames B7, a pressurizing pipe B8, a plurality of pressurized air spraying pipes B9, a pair of shaft fixing blocks B10, a rotating shaft B11, a stirring frame B12, a grinding box B13, a conveying pipe B14, a powder inlet hopper B15, a rotary connecting pipe head B16, a spiral powder spraying head B17, a pair of rotary fixing components, and a waste box B18.

[0081] The powder storage box B2 is installed at the left position on the upper wall surface of the equipment support B1. The powder chamber B3 is opened inside the powder storage box B2. The powder inlet B4 is opened on the upper wall surface of the powder storage box B2. The air compressor pump B5 is installed at the left position on the powder storage box B2. The upper ends of a pair of air inlet connecting pipes B6 are installed on the air outlet of the air compressor pump B5. The lower ends of the pair of air inlet connecting pipes B6 penetrate and extend into the powder chamber B3. A pair of support frames B7 are installed on the left side wall surface of the powder chamber B3. The pressure pipe B8 is installed on the pair of support frames B7. The pair of air inlet connecting pipes B6 are connected to the pressure pipe B8. A number of pressure jet pipes B9 are installed on the lower wall surface of the pressure pipe B8. A pair of shaft fixing blocks B10 are installed at the middle position between the upper and lower wall surfaces of the powder chamber B3. The rotating shaft B11 is installed on the pair of shaft fixing blocks B10. The stirring frame B12 is installed on the rotating shaft B11. The grinding box B13 is installed at the right position on the upper wall surface of the equipment support B1. The two ends of the conveying pipe B14 are respectively embedded in the powder storage box B2 and the grinding box B13. The powder inlet hopper B15 is installed at the left end of the conveying pipe B14. The rotating connecting pipe head B16 is installed at the right end of the conveying pipe B14. The spiral powder spraying head B17 is installed on the rotating connecting pipe head B16. A pair of rotating fixing components are installed on the upper inner wall surface of the grinding box B13. One of the pair of rotating fixing components is connected to the spiral powder spraying head B17. The waste box B18 is installed on the lower wall surface of the equipment support B1. The waste box B18 is located below the grinding box B13;

[0082] The powder inlet B4 is provided with a screw thread B19 for screwing. The rotating shaft B11 is installed on the shaft fixing block B10 through the first rotating bearing B20. One of the pair of rotating fixing components is connected to the spiral powder spraying head B17 through the connecting rod B21. The grinding box B13 is installed with an observation window B22.

[0083] One of the pair of rotating fixing components includes: a fixing rod B23, an outer support sleeve B24, a second rotating bearing B25, an inner rotating sleeve B26 and a pair of rubber support rings B27;

[0084] The fixing rod B23 is installed on the upper inner wall surface of the grinding box B13. The outer support sleeve B24 is installed at the lower end of the fixing rod B23. The second rotating bearing B25 is installed on the inner wall surface of the outer support sleeve B24. The inner rotating sleeve B26 is installed on the inner wall surface of the second rotating bearing B25. The pair of rubber support rings B27 are installed on the inner wall surface of the inner rotating sleeve B26;

[0085] A pressurized jet-type rotary powder spraying and grinding structure is installed on the equipment support B1. When in use, open the screw thread B19 installed on the powder inlet B4 to ensure airtightness, and put the abrasive walnut shell powder for grinding into the powder chamber B3 opened inside the powder storage tank B2 through the powder inlet B4 to ensure that there is sufficient abrasive in the powder chamber B3. Open the observation window B22, and place a number of bundled and fixed metal capillary tubes through the middle position of the inner rotating sleeve B26. The inner rotating sleeve B26 is fixed by the deformation of the rubber support ring B27 provided on the inner wall surface of the inner rotating sleeve B26. When fixing, align the nozzle of the metal capillary tube with the powder outlet of the spiral powder spraying head B17 one by one. Control the controller matching the equipment to start the equipment. The controller issues a start electrical signal to control the start of the air compressor pump B5 installed on the powder storage tank B2. The air compressor pump B5 starts to compress the air pressure through the piston in the pump body, thereby increasing the air pressure. The compressed air is transported through a pair of air inlet connecting pipes B6 into the pressurizing pipe B8 installed in the powder chamber B3 through the support frame B7. The compressed air in the pressurizing pipe B8 sprays out from the air outlet holes on the pressurizing air pipe B9 installed below, blowing the abrasive in the powder chamber B3 to the right, and blowing the walnut shell powder abrasive into the powder inlet hopper B15. Due to the long-term continuous blowing of the pressurizing air pipe B9, the walnut shell powder particles are small and are under the wind pressure for a long time, so there may be a caking phenomenon. The stirring frame B12 installed on the rotating shaft B11 rotates slowly under the drive of the drive motor installed above the powder storage tank B2, and cooperates with the first rotating bearing B20 on the shaft fixing block B10 to stir the grinding material, thereby preventing the abrasive from caking. The abrasive enters the powder inlet hopper B15 along with the high-pressure air flow and is transported through the conveying pipe B14. A number of spiral-shaped powder outlet holes are opened on the spiral powder spraying head B17 installed on the rotating connecting pipe head B16. Under the action of the high-pressure air flow, the spiral powder spraying head B17 rotates and sprays powder in cooperation with the rotating connecting pipe head B16. Due to the cooperation of the spiral powder outlet and the rotation of the spiral powder spraying head B17, the sprayed abrasive is in a spiral shape. When the spiral powder spraying head B17 rotates, it drives the inner rotating sleeve B26 to rotate through the connecting rod B21. The inner rotating sleeve B26 rotates on the outer support sleeve B24 installed in the grinding box B13 through the fixed rod B23 through the second rotating bearing B25. A pair of inner rotating sleeves B26 and the spiral powder spraying head B17 rotate synchronously, so that the spiral-shaped abrasive sprayed by the spiral powder spraying head B17 is sprayed into the metal capillary tube. The spiral-shaped sprayed abrasive can effectively increase the friction force between the abrasive and the inner wall of the metal capillary tube, ensuring the grinding effect. The abrasive after grinding falls into the waste material box B18 installed below, thus realizing the rotary powder spraying and grinding of the metal capillary tube.

[0086] In the specific implementation process, further, the cleaning method described in step S6 is specifically as follows: The water used for cleaning is purified by means of activated carbon adsorption and filtration, and after purification, it is ejected under pressure. When ejecting, the ejection pressure is adjusted by using different water outlets to be applicable to different cleaning situations;

[0087] It should be noted that when cleaning the polished metal capillary, a metal capillary inner surface flushing device is used, and a replaceable pressurized cleaning structure C is installed thereon;

[0088] The replaceable pressurized cleaning structure C includes: a fixed base C1, a cleaning tank C2, a drainage grid C3, a cleaning chamber C4, a waste water chamber C5, a mounting bracket C6, an electric rotating seat C7, a cleaning fixing grid C8, a water tank C9, a mounting plate C10, a delivery pump C11, a suction pipe C12, a connecting pipe C13, an activated carbon filter tank C14, a water delivery pipe C15, a booster pump C16, a booster pipe C17, a switch control valve C18, and a replaceable water outlet assembly;

[0089] The cleaning tank C2 is installed at the middle position of the upper wall surface of the fixed base C1, the drainage grid C3 is installed at the middle position inside the cleaning tank C2, the cleaning chamber C4 is located above the drainage grid C3, the waste water chamber C5 is located below the drainage grid C3, the mounting bracket C6 is installed on the inner wall surface of the cleaning chamber C4, the electric rotating seat C7 is installed on the mounting bracket C6, the cleaning fixing grid C8 is installed on the electric rotating seat C7, the water tank C9 is installed at the left side position of the cleaning tank C2, the mounting plate C10 is installed above the water tank C9, the delivery pump C11 is installed on the mounting plate C10, one end of the suction pipe C12 is installed on the water inlet of the delivery pump C11, the other end of the suction pipe C12 extends downward into the water tank C9, one end of the connecting pipe C13 is installed on the water outlet of the delivery pump C11, the activated carbon filter tank C14 is installed at the upper position of the left side wall surface of the cleaning tank C2, the other end of the connecting pipe C13 is installed on the water inlet of the activated carbon filter tank C14, the left end of the water delivery pipe C15 is installed on the water outlet of the activated carbon filter tank C14, the right end of the water delivery pipe C15 is embedded in the water inlet of the upper wall surface of the cleaning tank C2, the booster pump C16 is installed at the right side position of the cleaning tank C2, both ends of the booster pipe C17 are respectively installed on the booster pump C16 and the water delivery pipe C15, the switch control valve C18 is installed on the upper wall surface of the cleaning chamber C4, the switch control valve C18 is connected to the water delivery pipe C15, and the replaceable water outlet assembly is installed on the upper wall surface of the cleaning chamber C4, and the replaceable water outlet assembly is connected to the switch control valve C18;

[0090] An observation chamber door C19 is installed on the front wall surface of the cleaning tank C2, the delivery pump C11 is installed on the mounting plate C10 through a fixing bolt C20, and the activated carbon filter tank C14 is installed on the cleaning tank C2 through a support seat C21;

[0091] The replaceable water outlet assembly includes: a sliding rod frame C22, a water outlet connection block C23, three pairs of sliding sleeves C24, a main water outlet C25, a micro water outlet C26, two pairs of fixing frames C27, and a pair of hydraulic push rods C28;

[0092] The sliding rod frame C22 is installed on the upper wall surface of the cleaning chamber C4. Three pairs of sliding sleeves C24 are installed on the front and rear wall surfaces of the water outlet connection block C23. The water outlet connection block C23 is installed on the sliding rod frame C22 through the three pairs of sliding sleeves C24. Both the main water outlet C25 and the micro water outlet C26 are installed on the water outlet on the lower wall surface of the water outlet connection block C23. Two pairs of fixing frames C27 are installed on both sides of the switch control valve C18. A pair of hydraulic push rods C28 are installed on the two pairs of fixing frames C27. The output ends of the pair of hydraulic push rods C28 are installed on both side wall surfaces of the water outlet connection block C23;

[0093] The output ends of the pair of hydraulic push rods C28 are installed on the water outlet connection block C23 through the connection block C29;

[0094] When using the replacement type pressurized cleaning structure, the fixed base C1 supports the overall equipment above. Open the observation box door C19, place the bundled and fixed metal capillary tube on the cleaning fixed wire rack C8 above the electric rotating seat C7 installed in the cleaning chamber C4 through the mounting bracket C6 for installation and fixation. After the fixation is completed, close the observation box door C19 to ensure the sealing during cleaning. Operate the controller matching the equipment to start the equipment. The external controller sends a control signal to start the equipment. The delivery pump C11 installed on the mounting plate C10 through the fixing bolt C20 starts after receiving the control signal. The rotating impeller inside the delivery pump C11 starts to rotate at high speed. The water in the water tank C9 is pumped upward through the centrifugal force and the pressure difference on both sides in cooperation with the water suction pipe C12, and the water is continuously injected into the activated carbon filter box C14 installed on the side wall of the cleaning box C2 through the support seat C21 through the connecting pipe C13. Since the activated carbon has a large number of micropores and mesoporous structures, these micropores and mesopores provide a huge surface area, thereby increasing the ability of the activated carbon to adsorb pollutants. The pumped water is filtered and purified by the adsorption filtration method. The purified water is transported to the water inlet position on the upper wall surface of the cleaning box C2 through the water delivery pipe C15 to achieve the purpose of purified water supply. While injecting water, the booster pump C16 installed on the right side of the cleaning box C2 starts. The booster pump C16 compresses the gas to increase the gas pressure. The high-pressure gas is transported to the connection position with the water delivery pipe C15 through the booster pipe C17, so as to adjust the pressure of the cleaning spray. When cleaning, the switch control valve C18 is opened. The filtered and pressurized water sprays downward. The cleaning water is transported downward from the water outlet opened on the water outlet connection block C23 connected to the switch control valve C18 and sprayed out through the micro water outlet C26 installed on the lower wall surface. It is sprayed out through the fine water channels opened on the micro water outlet C26. The smaller diameter pipe can increase the water flow rate, thereby increasing the water pressure. The stubborn impurities left on the surface of the metal capillary tube due to grinding and polishing are washed and cleaned by the high-pressure sprayed water flow. When the preliminary cleaning is completed, the hydraulic push rod C28 installed in the cleaning box C2 through the fixing frame C27 starts to extend and retract at the output end. The water outlet connection block C23 is driven through the connecting block C29 to move in position on the sliding rod frame C22 in cooperation with the sliding sleeve C24, so that the micro water outlet C26 is replaced by the main water outlet C25 and connected to the switch control valve C18 for normal water pressure washing and cleaning. While performing the washing and cleaning, the electric rotating seat C7 rotates synchronously. The rotation of the electric rotating seat C7 drives the metal capillary tube to rotate, thereby increasing the contact area with the water flow and ensuring the cleaning effect. The wastewater generated after cleaning leaks into the wastewater chamber C5 through the drainage wire rack C3 installed in the middle of the cleaning box C2, and the wastewater is discharged through the drain pipe arranged on the rear wall surface of the wastewater chamber C5, so as to achieve the adjustable replacement type washing and cleaning of the metal capillary tube and ensure the cleanliness of the metal capillary tube.

[0095] In the specific implementation process, further, the walnut peel powder is filled into a conical forming mold in units of 10 g for freeze forming.

[0096] In the specific implementation process, further, when performing fine powder spraying and polishing, the metal capillary tube and the powder spraying head rotate synchronously.

[0097] In the specific implementation process, further, the single - charge grinding time in the stage grinding described in step S2 is controlled within 5 s - 10 s to prevent the walnut peel powder from deteriorating due to high temperature.

[0098] In the specific implementation process, further, the abrasive is recycled and reused after being used in the polishing process. The abrasive is walnut peel powder, which is an organic substance. Recycling and reusing it can be used as organic fertilizer.

[0099] 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 method for grinding, polishing and detecting the inner surface of a metal capillary, comprising the following steps: Step S1, washing and crushing the raw material of the abrasive, walnut husk, and screening and cleaning the crushed raw material after washing and crushing to remove the remaining impurities and dust; Step S2, crushing and grinding the walnut skin raw material obtained in step S1, and grinding the crushed walnut skin into a powdery abrasive by a staged temperature-controlled grinding method; Step S3, using liquid nitrogen to freeze the primary walnut skin powder obtained in step S2 to form a block structure of the powdered abrasive by low-temperature quick freezing, and then using a low-speed fine grinding device to grind the walnut skin powder again to make the abrasive finer; Step S4, the abrasive obtained in step S3 is fed by electromagnetic pressure and wind pressure airflow, and rough grinding is achieved by contact between the abrasive and the inner wall of the metal capillary; Step S5, re-grinding the inner wall surface of the metal capillary that has been roughly ground in step S4 by using a rotating air pressure powder spraying method, so that the walnut skin powder is sprayed out in a spiral shape by rotating, increasing the contact with the metal capillary, and achieving fine grinding processing; Step S6, cleaning the metal capillary after polishing in step S5, filtering and purifying the water used for cleaning before cleaning to prevent impurities in the water from damaging the metal capillary, and performing adjustable flushing according to different cleaning conditions to ensure that the metal capillary is clean; Step S7, drying the polished metal capillary by high-temperature hot air, and testing the polishing effect by using a polishing detector after drying.

2. A method for grinding, polishing and detecting the inner surface of a metal capillary tube according to claim 1, characterized in that, The staged temperature-controlled grinding method described in step S2 is to grind the walnut skin powder quickly in small quantities multiple times through stage grinding to reduce the grinding time of the walnut skin powder and prevent the temperature from rising. The temperature of the grinding chamber is measured in real time by a temperature monitoring sensor. When the temperature rises due to grinding, the grinding chamber is cooled by inputting cold air to prevent the walnut skin powder from deteriorating due to the temperature rise.

3. A method for inner surface grinding, polishing and detection of a metal capillary tube according to claim 1, characterized in that, The method of low-temperature freezing grinding described in step S3 is specifically as follows: the walnut skin powder obtained by coarse grinding in step S2 is placed in a conical molding mold, and is quickly frozen and molded by the ultra-low temperature of liquid nitrogen, the coarsely ground walnut skin powder is frozen into blocks, and then the frozen walnut skin powder blocks are finely ground using low-speed fine grinding equipment to obtain abrasives for grinding and polishing.

4. A method for inner surface grinding, polishing and inspection of a metal capillary tube according to claim 1, characterized in that, The rough grinding method described in step S4 is specifically as follows: the abrasive is put into a storage barrel, and the abrasive is lifted upward by magnetic attraction to feed the abrasive. At the same time, the metal capillary to be polished is fixed by electromagnetic fixing, and the abrasive is injected into the metal capillary. The inner wall is polished by the movement of the abrasive in the metal capillary and the friction with the inner wall of the metal capillary. The electromagnetic feeding is a fixed rate. When the feeding rate needs to be adjusted, the abrasive feeding speed can be adjusted by adjusting the wind pressure and airflow, and the grinding rate can be adjusted.

5. A method for grinding, polishing and detecting the inner surface of a metal capillary tube according to claim 1, characterized in that, The specific fine grinding method described in step S5 is as follows: The abrasive is conveyed by means of air pressure. The abrasive is ejected through a powder spraying head that can rotate and has spiral grooves inside. The rotation of the powder spraying head itself in cooperation with the spiral grooves inside can make the abrasive eject in a spiral shape. Compared with the abrasive that ejects linearly, it can greatly increase the contact with the inner wall of the metal capillary, ensuring the effect of grinding and polishing and achieving the purpose of fine grinding.

6. A method for grinding, polishing and detecting the inner surface of a metal capillary tube according to claim 1, characterized in that, The specific cleaning method described in step S6 is as follows: The water used for cleaning is purified by means of activated carbon adsorption and filtration, and after purification, it is ejected under pressure. When ejecting, the ejection pressure is adjusted by using different water outlets to be applicable to different cleaning situations.

7. A method for grinding, polishing and detecting the inner surface of a metal capillary tube according to claim 3, characterized in that, The walnut skin powder is filled into a conical molding die in units of 10 g for freeze molding.

8. A method for grinding, polishing and detecting the inner surface of a metal capillary tube according to claim 5, characterized in that, When performing powder spraying and fine grinding, the metal capillary rotates synchronously with the powder spraying head.

9. A method for grinding, polishing and detecting the inner surface of a metal capillary tube according to claim 1, characterized in that, The single - charge grinding time of the stage grinding described in step S2 is controlled within 5 s - 10 s to prevent the walnut skin powder from deteriorating due to high temperature.

10. A method for inner surface grinding, polishing and detecting of a metal capillary tube according to claim 1, characterized in that, The abrasive is recycled and reused after being used in the polishing process.

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