Invar alloy grinding device and method

Abstract

The invention discloses an invar alloy grinding device and method, and relates to the technical field of invar alloy grinding machining.The invar alloy grinding device comprises an invar alloy guide pipe and a mounting plate and further comprises a magnet yoke, the magnet yoke is rotationally mounted on the side wall of the mounting plate, and a plurality of evenly-arranged moving blocks are slidably mounted on the magnet yoke through a plurality of sliding assemblies; a magnetic pole is fixedly mounted on each moving block; comprising the following steps that magnetic grinding materials for grinding are loaded into the invar alloy guide pipe to be ground, the invar alloy guide pipe penetrates through a mounting plate and is fixed, meanwhile, the two ends of the invar alloy guide pipe are blocked, and the mounting plate is adjusted to be located at one end of the invar alloy guide pipe. The device has the advantages that the inner face and the outer face of the invar alloy guide pipe can be ground at the same time, the machining efficiency is greatly improved, meanwhile, adjustment operation of inner grinding precision and outer grinding precision can be completed in a mutual reference mode, consistency of the inner grinding precision and the outer grinding precision can be conveniently guaranteed, and the inner grinding effect and the outer grinding effect can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of Invar alloy grinding processing, and in particular to an Invar alloy grinding device and method. Background Art

[0002] Invar alloy is an alloy mainly composed of iron and nickel. It has excellent low expansion characteristics and is widely used in the field of precision engineering, especially in occasions that are sensitive to temperature changes, such as precision instruments, aerospace, and the electronics industry. The precision engineering field has relatively high requirements for the precision of Invar alloy products, so they need to be ground after production. Ordinary surface grinding technology is now relatively mature, but there is still much room for improvement in the internal grinding of products such as catheters.

[0003] After searching, a patent document with publication number CN118404414A discloses a magnetic grinding device and method for processing the inner surface of a catheter, including a base and a manipulator arranged on the base, a polishing mechanism for processing the inner surface of the catheter is arranged on the moving end of the manipulator, and clamping components for fixing the grinding position of the catheter are respectively arranged at both ends of the base, and the polishing mechanism includes a base arranged at the gripper of the manipulator.

[0004] The above-mentioned magnetic grinding device and method for processing the inner surface of the catheter adopts magnetic particle grinding technology to achieve grinding processing on the inner surface of the catheter, but still has the following shortcomings: It is impossible to grind the outer surface of the catheter while grinding the inner surface of the catheter, which requires secondary processing, resulting in low work efficiency. In addition, it is difficult to accurately adjust the grinding accuracy of the inner and outer processing during separate processing, which increases the difficulty of grinding. Therefore, it is necessary to design an Invar alloy grinding device and method. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides an Invar alloy grinding device and method, which solves the problems raised in the above background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: An Invar alloy grinding device comprises an Invar alloy guide tube and a mounting plate, and further comprises: A magnetic yoke, wherein the magnetic yoke is rotatably mounted on the side wall of the mounting plate, and a plurality of evenly arranged moving blocks are slidably mounted on the magnetic yoke through a plurality of sliding assemblies, a magnetic pole is fixedly mounted on each of the moving blocks, and an adjusting assembly matched with the plurality of sliding assemblies is rotatably mounted on the magnetic yoke, the sliding assembly is used to adjust the spacing between the magnetic pole and the Invar alloy conduit, and the adjusting assembly is used to synchronously control the operation of the plurality of sliding assemblies; A mounting ring, the mounting ring is fixedly mounted on the side wall of the magnetic yoke, and the mounting ring is located at the center of the mounting plate, a plurality of external grinding blocks are mounted on the mounting ring, and a plurality of collecting chambers are provided in the mounting ring, the plurality of collecting chambers and the plurality of external grinding blocks are arranged in a staggered manner, a plurality of groups of negative pressure holes are provided on the inner wall of the mounting ring, and each group of negative pressure holes is communicated with the corresponding collecting chamber; The negative pressure part is used to keep the multiple groups of negative pressure holes in a negative pressure state at all times when the mounting ring rotates relative to the mounting plate, so as to collect the powder and debris generated in time during the grinding process.

[0007] Furthermore, a connecting ring is fixedly installed on the side wall of the yoke, an annular groove that slidably cooperates with the connecting ring is opened on the side wall of the mounting plate, and a fixed gear ring is fixedly installed on the side wall of the connecting ring, a motor is fixedly installed on the side wall of the mounting plate, and the output end of the motor is fixedly connected to a driving gear that meshes with the fixed gear ring.

[0008] Furthermore, a T-ring is fixedly installed on the side wall of the connecting ring away from the yoke, a rotating groove matching the T-ring is opened on the inner wall of the mounting plate, and the rotating groove is interconnected with the annular groove, and an annular cavity is opened on the side wall of the T-ring, and the annular cavity is interconnected with multiple collecting cavities.

[0009] Furthermore, the negative pressure part includes a sealing ring that is sealed and rotatably connected in the annular cavity, and a plurality of inclined fan blades are fixedly installed on the inner wall of the sealing ring, a transmission gear ring is fixedly installed on the outer wall of the sealing ring, a groove that matches the transmission gear ring is opened on the side wall of the rotating groove, and an inner gear ring that meshes with the transmission gear ring is fixedly installed in the groove.

[0010] Furthermore, the sliding assembly consists of an adjustment groove, an adjustment block, a screw and a bevel gear. The adjustment groove is opened on the yoke, the adjustment block is slidably connected to the adjustment groove, the screw is rotatably installed in the adjustment groove, and the screw is threadedly connected to the adjustment block, and the bevel gear is fixedly installed at one end of the screw located outside the yoke.

[0011] Furthermore, the adjustment assembly consists of an adjustment ring, a connecting cavity and a conical gear ring. The adjustment ring is rotatably mounted on the side wall of the yoke, the connecting cavity is opened on the inner wall of the adjustment ring, and the connecting cavity corresponds to the positions of multiple bevel gears. The conical gear ring is fixedly mounted in the connecting cavity, and the conical gear ring is meshed with multiple bevel gears.

[0012] Furthermore, an adjusting knob is threadably mounted on the adjusting ring via a screw, and an insert rod is fixedly mounted on one end of the screw located in the connecting cavity, and a plurality of insert holes matching with the insert rod are provided on the side wall of the yoke.

[0013] Furthermore, a plurality of plug-in grooves are provided on the inner wall of the mounting ring, and a plug-in seat is plugged into each of the plug-in grooves, each of the plug-in seats is fixedly connected to the corresponding external grinding block, and two fixed blocks are fixedly installed at one end of each of the plug-in seats away from the yoke, and a plurality of plug-in mechanisms cooperating with the corresponding fixed blocks are installed on the mounting ring.

[0014] Furthermore, the plug-in mechanism is composed of a mounting block, a positioning rod, a pulling block and a tension spring. The mounting block is fixedly mounted on the side wall of the mounting ring, the positioning rod is slidably mounted on the mounting block, and the positioning rod and the fixed block are also slidably matched. A pulling block is fixedly mounted on the end of the positioning rod away from the fixed block, and a tension spring is installed between the pulling block and the mounting block. A sealing plate is installed on the end of the collecting chamber away from the yoke, an air outlet is opened on the side wall of the annular cavity, and a filter is fixedly mounted on the end of the annular cavity close to the collecting chamber.

[0015] An Invar alloy grinding method, using the above-mentioned Invar alloy grinding device, comprises the following steps: S1: Loading the grinding magnetic abrasive into the Invar alloy tube to be ground, passing the Invar alloy tube through the mounting plate and fixing it while sealing both ends, and adjusting the mounting plate to be located at one end of the Invar alloy tube; S2: Turn the adjustment knob counterclockwise to separate the plug rod from the plug hole to release the fixation of the adjustment ring position, then rotate the adjustment ring to adjust the spacing of multiple magnetic poles relative to the Invar alloy guide tube at the same time, select an external grinding block of corresponding size, fix it on the mounting ring by using the matching of the socket and the socket slot, and fix the external grinding block by using the matching of the positioning rod and the fixing block; S3: Start the motor, and use the matching magnetic yoke of the driving gear and the fixed gear ring to rotate on the mounting plate. At this time, the magnetic pole drives the magnetic abrasive in the Invar alloy tube to rotate at the same time, and the friction with the inner wall of the Invar alloy tube is used to achieve the grinding process inside the Invar alloy tube; S4: During the rotation of the magnetic yoke, the mounting ring is driven by the connecting ring and the T-ring to rotate relative to the mounting plate at the same time, and at this time, multiple external grinding blocks installed on the mounting ring rotate relative to the side wall of the Invar alloy pipe to grind the side wall thereof; S5: During the rotation of the mounting ring, the inner gear ring and the transmission gear ring cooperate to drive the sealing ring to rotate in the annular cavity. At this time, the rotation of multiple inclined blades discharges the air in the collection cavity, thereby generating negative pressure at multiple negative pressure holes to collect the powder and debris generated during the external grinding process. S6: The rotation speed of the motor and the travel speed of the mounting plate relative to the Invar alloy tube are controlled according to the grinding accuracy requirements, so as to complete the simultaneous grinding of the inner and outer surfaces of the entire Invar alloy tube. After the grinding process is completed, the Invar alloy tube is released and removed from the mounting plate, and then the magnetic abrasive is poured out and cleaned and recovered, and then the sealing plate is removed to clean the powder and debris collected in the collection chamber.

[0016] Compared with the prior art, the present invention has the following advantages: 1: Through the cooperation of the mounting ring and the outer grinding block, the outer wall of the Invar alloy catheter can be ground at the same time when the inner wall is ground by magnetic particle grinding technology, without the need for secondary processing, which can greatly improve the processing efficiency.

[0017] 2: Through the cooperation of the adjustment component and the sliding component, the distance between multiple magnetic poles and the Invar alloy tube can be adjusted at the same time, which can not only reduce the difficulty of adjustment, but also ensure the accuracy of magnetic force adjustment, thereby ensuring the grinding accuracy of the inner wall of the Invar alloy tube.

[0018] 3: Through the cooperation of the socket and the plug-in mechanism, it is convenient to replace the specific specifications of the external grinding block according to the grinding requirements. Therefore, when adjusting the grinding accuracy, the magnetic pole position and the specifications of the external grinding block can be adjusted at the same time, and the two can be referenced to each other, which is convenient for the consistency adjustment of the internal and external processing grinding accuracy and reduces the overall grinding difficulty.

[0019] 4: Through the coordination of the negative pressure holes and the negative pressure part arranged at intervals, the rotation of the mounting ring during the grinding process can be utilized to automatically generate negative pressure to collect the powder and debris formed, which can effectively avoid the influence of powder and debris on the external grinding accuracy. This collection method is more timely and can greatly improve the cleanliness of the external grinding block during the grinding process, thereby also improving the grinding effect.

[0020] In summary, the present invention can grind both the inner and outer surfaces of the Invar alloy catheter at the same time, and the processing efficiency is greatly improved. At the same time, the adjustment operation of the inner and outer grinding precision can be completed by referring to each other, which is convenient for ensuring the consistency of the inner and outer grinding precision and ensuring the inner and outer grinding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of an Invar alloy grinding device proposed by the present invention; Figure 2 for Figure 1 A schematic diagram of the structure from another perspective; Figure 3 for Figure 2 A magnified schematic diagram of the structure after the Invar alloy tube is removed; Figure 4 for Figure 3 A top view of Figure 5 for Figure 4 Schematic diagram of the three-dimensional structure of the AA surface in the middle; Figure 6 for Figure 5 A schematic diagram of the structure enlargement of part a; Figure 7 for Figure 5 A schematic diagram of the structure of part b is enlarged; Figure 8 for Figure 3 Schematic diagram of structural decomposition; Fig. 9 for Figure 8 An enlarged schematic diagram of the structure at the middle yoke from another perspective; Fig.10 for Figure 8 An enlarged schematic diagram of the structure at the middle T-ring from another perspective; Fig.11 for Fig.10 The enlarged schematic diagram of the structure of part c; Fig.12 for Fig.10 Schematic diagram of structural decomposition; Fig.13 for Fig. 9 Schematic diagram of structural decomposition from another perspective.

[0022] In the figure: 1. Invar alloy conduit; 2. Mounting plate; 3. yoke; 4. Moving block; 5. Magnetic pole; 6. Mounting ring; 7. External grinding block; 8. Collecting chamber; 9. Negative pressure hole; 10. Sealing plate; 11. Connecting ring; 12. Annular groove; 13. Fixed gear ring; 14. Motor; 15. Driving gear; 16. T-ring; 17. Rotating groove; 18. Annular chamber; 19. Sealing ring; 20. Transmission gear ring; 21. Groove; 22. Inner gear ring; 23. Inclined fan blade; 24. Adjusting groove; 25. Adjusting block; 26. Screw rod; 27. Bevel gear; 28. Adjusting ring; 29. ​​Connecting chamber; 30. Conical gear ring; 31. Socket; 32. Adjusting knob; 33. Plug-in slot; 34. Plug-in seat; 35. Fixed block; 36. Mounting block; 37. Positioning rod; 38. Pulling block; 39. Tension spring. DETAILED DESCRIPTION

[0023] Reference Figure 1-Figure 13, an Invar alloy grinding device, comprising an Invar alloy conduit 1 and a mounting plate 2, and also comprising a yoke 3, the yoke 3 is rotatably mounted on the side wall of the mounting plate 2, and a plurality of evenly arranged moving blocks 4 are slidably mounted on the yoke 3 through a plurality of sliding components, and a magnetic pole 5 is fixedly mounted on each moving block 4, the cooperation of the yoke 3 and the magnetic pole 5 can effectively guide and control the magnetic flux, so that the magnetic field is more stable, when grinding the inner wall of the Invar alloy conduit 1, a certain amount of magnetic abrasive is poured into the Invar alloy conduit 1, and the size and shape of the magnetic abrasive are correspondingly selected according to the required grinding effect, and then the magnetic force effect applied by the magnetic pole 5 to the magnetic abrasive is used to make it stick to the inner wall of the Invar alloy conduit 1, and when the magnetic pole 5 rotates relative to the Invar alloy conduit 1, the magnetic abrasive can be simultaneously moved inside the Invar alloy conduit 1 to achieve grinding of its inner wall.

[0024] A connecting ring 11 is fixedly installed on the side wall of the yoke 3, an annular groove 12 is opened on the side wall of the mounting plate 2 for sliding cooperation with the connecting ring 11, and a fixed gear ring 13 is fixedly installed on the side wall of the connecting ring 11, and a motor 14 is fixedly installed on the side wall of the mounting plate 2, and a driving gear 15 meshing with the fixed gear ring 13 is fixedly connected to the output end of the motor 14. Through the cooperation between the fixed gear ring 13 and the driving gear 15, the connecting ring 11 can be driven to rotate when the motor 14 is working, thereby providing drive for the rotation of the yoke 3 on the mounting plate 2. The motor 14 can specifically adopt a motor that can only rotate in one direction, which is commonly seen in daily life and work.

[0025] When grinding the Invar alloy tube 1, its two ends need to be fixed and the movement of the mounting plate 2 relative to the Invar alloy tube 1 needs to be controlled. Therefore, corresponding fixing fixtures and driving devices are required. The specific fixing fixtures and driving devices used can adopt the same technical means as in the prior art, which will not be elaborated here.

[0026] The sliding assembly consists of an adjusting groove 24, an adjusting block 25, a screw 26 and a bevel gear 27. The adjusting groove 24 is provided on the yoke 3, the adjusting block 25 is slidably connected to the adjusting groove 24, the screw 26 is rotatably installed in the adjusting groove 24, and the screw 26 is threadedly connected to the adjusting block 25, and the bevel gear 27 is fixedly installed on one end of the screw 26 located outside the yoke 3. When the screw 26 rotates, the moving block 4 can be driven to move on the yoke 3 through the adjusting block 25, thereby adjusting the spacing between the magnetic pole 5 and the Invar alloy catheter 1, thereby controlling the magnetic force of the magnetic pole 5 relative to the magnetic abrasive inside the Invar alloy catheter 1, and then regulating the grinding force of the magnetic abrasive on the inner wall of the Invar alloy catheter 1.

[0027] An adjusting assembly that cooperates with multiple sliding assemblies is also rotatably mounted on the yoke 3. The adjusting assembly consists of an adjusting ring 28, a connecting cavity 29 and a conical gear ring 30. The adjusting ring 28 is rotatably mounted on the side wall of the yoke 3. The connecting cavity 29 is provided on the inner wall of the adjusting ring 28, and the connecting cavity 29 corresponds to the position of multiple bevel gears 27. The conical gear ring 30 is fixedly mounted in the connecting cavity 29, and the conical gear ring 30 is meshed with multiple bevel gears 27. When the adjusting ring 28 rotates, the multiple bevel gears 27 are driven to rotate simultaneously through the conical gear ring 30. At this time, multiple lead screws 26 rotate in the same direction at the same time, so that multiple magnetic poles 5 are simultaneously approached or moved away from the Invar alloy catheter 1, thereby realizing synchronous adjustment. This can not only reduce the difficulty of adjustment, but also ensure that the spacing between each magnetic pole 5 and the Invar alloy catheter 1 is consistent, thereby ensuring the grinding accuracy of the inner wall of the Invar alloy catheter 1.

[0028] A limit ring is fixedly installed on the inner wall of the adjusting ring 28, and an annular limit groove cooperating with the limit ring is provided on the side wall of the yoke 3, which is used to limit the position of the adjusting ring 28 relative to the yoke 3, so that the adjusting ring 28 can only be rotated on the yoke 3 to avoid its position displacement. An adjusting knob 32 is threadedly installed on the adjusting ring 28 through a screw, and a plug rod is fixedly installed on one end of the screw located in the connecting cavity 29. A plurality of sockets 31 cooperating with the plug rod are provided on the side wall of the yoke 3. Through the cooperation between the plug rod and the socket 31, the fixing effect of the adjusting ring 28 on the yoke 3 can be controlled. When the plug rod is connected with the socket 31, the adjusting ring 28 remains fixed on the yoke 3. At this time, the positions of the plurality of magnetic poles 5 cannot be adjusted, which can ensure the stability of the position. When the plug rod is separated from the socket 31, the position of the magnetic pole 5 can be adjusted by rotating the adjusting ring 28.

[0029] The mounting ring 6 is located at the center of the mounting plate 2. A plurality of external grinding blocks 7 are mounted on the mounting ring 6. The external grinding blocks 7 are used to grind the outer wall of the Invar alloy conduit 1. The external grinding blocks 7 can grind the inner and outer surfaces of the Invar alloy conduit 1 at the same time by using the magnetic poles 5 and magnetic abrasives.

[0030] A plurality of plug-in slots 33 are provided on the inner wall of the mounting ring 6, and a plug-in seat 34 is plugged into each of the plug-in slots 33. Each plug-in seat 34 is fixedly connected to the corresponding outer grinding block 7. Two fixing blocks 35 are fixedly installed at one end of each plug-in seat 34 away from the yoke 3. A plurality of plug-in mechanisms matching the corresponding fixing blocks 35 are installed on the mounting ring 6. The plug-in mechanism consists of a mounting block 36, a positioning rod 37, a pulling block 38 and a tension spring 39. The mounting block 36 is fixedly installed on the side wall of the mounting ring 6, and the positioning rod 37 penetrates and slides on the mounting block 3 6, and the positioning rod 37 and the fixed block 35 also penetrate and slide together, a pulling block 38 is fixedly installed on the end of the positioning rod 37 away from the fixed block 35, and a tension spring 39 is installed between the pulling block 38 and the mounting block 36. Through the cooperation of the plug-in mechanism, the fixed block 35, the plug-in seat 34 and the plug-in groove 33, it is convenient to disassemble and assemble the external grinding block 7 on the mounting ring 6. Therefore, the size and specification of the external grinding block 7 can be selected according to the specific grinding requirements, so that it can better cooperate with the magnetic abrasive to complete the high-precision grinding of the Invar alloy catheter 1 as a whole.

[0031] A T-ring 16 is fixedly installed on the side wall of the connecting ring 11 away from the yoke 3, and the T-ring 16 is fixedly connected to the mounting ring 6. A rotating groove 17 matching the T-ring 16 is opened on the inner wall of the mounting plate 2, and the rotating groove 17 is interconnected with the annular groove 12. Through the design of the T-ring 16, the mounting ring 6 can be driven to rotate at the same time when the yoke 3 rotates. Therefore, the operation of a motor 14 can provide drive for the inner and outer surfaces of the Invar alloy catheter 1 at the same time, which can effectively improve the work efficiency. At the same time, the grinding speed of the inner and outer surfaces is kept consistent, and the overall grinding accuracy can also be improved.

[0032] A plurality of collecting chambers 8 are provided in the mounting ring 6. A sealing plate 10 is provided at one end of the collecting chamber 8 away from the yoke 3. The collecting chamber 8 is used to collect the debris and powder generated during the grinding process of the outer wall of the Invar alloy tube 1. The plurality of collecting chambers 8 and the plurality of external grinding blocks 7 are arranged in a staggered manner. The staggered arrangement can ensure the collection effect of the collecting chamber 8 on the debris and powder, and can collect the powder and debris in time when the powder and debris are generated during the grinding, thereby ensuring the collection effect. This collection method is more timely and can effectively avoid the adverse effect of the existence of powder and debris on the subsequent grinding effect of the outer wall of the external grinding block 7, greatly improve the neatness of the grinding process of the external grinding block 7, and reduce the possibility of the debris being stuck between the external grinding block 7 and the Invar alloy tube 1, resulting in scratches on the outer wall of the Invar alloy tube 1. A plurality of groups of negative pressure holes 9 are provided on the inner wall of the mounting ring 6, and each group of negative pressure holes 9 is respectively communicated with the corresponding collecting chamber 8. An annular chamber 18 is provided on the side wall of the T-ring 16, and the annular chamber 18 is communicated with the plurality of collecting chambers 8.

[0033] The negative pressure part includes a sealing ring 19 which is connected to the annular cavity 18 in a sealed rotation manner, and a plurality of inclined blades 23 are fixedly mounted on the inner wall of the sealing ring 19, and a transmission gear ring 20 is fixedly mounted on the outer wall of the sealing ring 19. A groove 21 which matches the transmission gear ring 20 is provided on the side wall of the rotating groove 17, and an inner gear ring 22 which meshes with the transmission gear ring 20 is fixedly mounted in the groove 21. When the mounting ring 6 rotates on the mounting plate 2, the cooperation between the inner gear ring 22 and the transmission gear ring 20 causes the sealing ring 19 to rotate simultaneously. At this time, A plurality of inclined blades 23 rotate in the annular cavity 18. The angle design of the inclined blades 23 and the coordination of their rotation direction allow the airflow in the collecting cavity 8 to enter the annular cavity 18. Therefore, the negative pressure holes 9 on the side wall of the collecting cavity 8 generate negative pressure, and the debris and powder are automatically collected during the grinding process without the need for an additional power component. The change in airflow generated when the inclined blades 23 rotate is related to their inclination angle and rotation direction. During specific use, the inclination angle of the inclined blades 23 can be set accordingly according to the required negative pressure.

[0034] An air outlet is provided on the side wall of the annular cavity 18, and the air outlet is used to discharge the gas entering the annular cavity 18. In specific implementation, an air duct can be connected to the air outlet to guide the discharged airflow. Specifically, the end of the air duct away from the air outlet can be set on the left side of the magnetic pole 5, which is used to remove dust from the outer wall of the Invar alloy catheter 1 to be ground in advance during the grinding process, so as to improve the subsequent outer wall grinding effect. A filter is fixedly installed at one end of the annular cavity 18 close to the collecting chamber 8. The design of the filter is used to prevent the debris and powder collected in the collecting chamber 8 from overflowing.

[0035] Since the Invar alloy tube 1 may have a bent portion, a swing connection may be adopted between the adjustment block 25 and the moving block 4, and a swing connection may also be adopted between the outer grinding block 7 and the socket 34. The shaft body adopted for the swing connection is perpendicular to the axis of the Invar alloy tube 1, and the shaft body is fixedly connected to the moving block 4 and the outer grinding block 7. At the same time, positioning plates are fixed at both ends of the shaft body, and a torsion spring is installed between the positioning plate and the corresponding adjustment block 25 and the socket 34. By utilizing the elastic force of the torsion spring, when the horizontal portion of the Invar alloy tube 1 is ground, the magnetic pole 5 and the outer grinding block 7 can be kept horizontal relative to the Invar alloy tube 1. When the curved portion of the Invar alloy tube 1 is ground, the extrusion effect can be utilized to deform the torsion spring, so that the magnetic pole 5 and the outer grinding block 7 can swing relative to the outer wall of the Invar alloy tube 1 at the same time, so as to maintain the fitting effect with the outer wall of the Invar alloy tube 1, thereby improving the grinding effect.

[0036] In the present invention, an Invar alloy grinding method comprises the following steps: S1: Loading the grinding magnetic abrasive into the Invar alloy conduit 1 to be ground, passing the Invar alloy conduit 1 through the mounting plate 2 and fixing it while sealing both ends thereof, and adjusting the mounting plate 2 so that it is located at one end of the Invar alloy conduit 1; S2: Turn the adjusting knob 32 counterclockwise to separate the plug rod from the plug hole 31 to release the fixation of the adjusting ring 28, then rotate the adjusting ring 28 to adjust the spacing between the plurality of magnetic poles 5 and the Invar alloy conduit 1 at the same time, select an outer grinding block 7 of corresponding size, fix it on the mounting ring 6 by using the matching of the plug seat 34 and the plug slot 33, and fix the outer grinding block 7 by using the matching of the positioning rod 37 and the fixing block 35; S3: Start the motor 14, and use the driving gear 15 and the matching magnetic yoke 3 of the fixed gear ring 13 to rotate on the mounting plate 2. At this time, the magnetic pole 5 drives the magnetic abrasive in the Invar alloy tube 1 to rotate at the same time, and the friction with the inner wall of the Invar alloy tube 1 is used to achieve the grinding process inside the Invar alloy tube 1; S4: During the rotation of the yoke 3, the mounting ring 6 is driven by the connecting ring 11 and the T-ring 16 to rotate relative to the mounting plate 2 at the same time. At this time, the multiple outer grinding blocks 7 installed on the mounting ring 6 rotate relative to the side wall of the Invar alloy catheter 1 to grind the side wall thereof; S5: During the rotation of the mounting ring 6, the inner gear ring 22 cooperates with the transmission gear ring 20 to drive the sealing ring 19 to rotate in the annular cavity 18. At this time, the rotation of the plurality of inclined blades 23 discharges the air in the collection cavity 8, thereby generating negative pressure at the plurality of negative pressure holes 9 to collect the powder and debris generated during the external grinding process; S6: The rotation speed of the motor 14 and the travel speed of the mounting plate 2 relative to the Invar alloy tube 1 are controlled according to the grinding accuracy requirements, so as to complete the simultaneous grinding of the inner and outer surfaces of the entire Invar alloy tube 1. After the grinding process is completed, the Invar alloy tube 1 is released and removed from the mounting plate 2, and then the magnetic abrasive is poured out and cleaned and recovered, and then the sealing plate 10 is removed to clean the powder and debris collected in the collection chamber 8.

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An Invar alloy grinding device, comprising an Invar alloy guide tube (1) and a mounting plate (2), characterized in that: Also includes: A magnetic yoke (3), the magnetic yoke (3) being rotatably mounted on a side wall of a mounting plate (2), and a plurality of evenly arranged moving blocks (4) being slidably mounted on the magnetic yoke (3) via a plurality of sliding assemblies, a magnetic pole (5) being fixedly mounted on each of the moving blocks (4), and an adjusting assembly cooperating with the plurality of sliding assemblies being rotatably mounted on the magnetic yoke (3), the sliding assembly being used to adjust the spacing between the magnetic pole (5) and the Invar alloy conduit (1), and the adjusting assembly being used to synchronously control the operation of the plurality of sliding assemblies; A mounting ring (6), wherein the mounting ring (6) is fixedly mounted on a side wall of the yoke (3), and the mounting ring (6) is located at a central position of the mounting plate (2); a plurality of external grinding blocks (7) are mounted on the mounting ring (6), and a plurality of collecting chambers (8) are provided in the mounting ring (6); the plurality of collecting chambers (8) and the plurality of external grinding blocks (7) are arranged in a staggered manner; a plurality of groups of negative pressure holes (9) are provided on an inner wall of the mounting ring (6), and each group of negative pressure holes (9) is communicated with a corresponding collecting chamber (8); The negative pressure part is used to keep the multiple groups of negative pressure holes (9) in a negative pressure state at all times when the mounting ring (6) rotates relative to the mounting plate (2), so as to collect the powder and debris generated in a timely manner during the grinding process.

2. The Invar alloy grinding device according to claim 1, characterized in that: A connecting ring (11) is fixedly mounted on the side wall of the yoke (3), an annular groove (12) slidably engaged with the connecting ring (11) is provided on the side wall of the mounting plate (2), a fixed gear ring (13) is fixedly mounted on the side wall of the connecting ring (11), a motor (14) is fixedly mounted on the side wall of the mounting plate (2), and an output end of the motor (14) is fixedly connected to a driving gear (15) meshing with the fixed gear ring (13).

3. The Invar alloy grinding device according to claim 2, characterized in that: A T-shaped ring (16) is fixedly mounted on the side wall of the connecting ring (11) away from the magnetic yoke (3); a rotation groove (17) matching the T-shaped ring (16) is provided on the inner wall of the mounting plate (2); the rotation groove (17) and the annular groove (12) are interconnected; an annular cavity (18) is provided on the side wall of the T-shaped ring (16); and the annular cavity (18) and the plurality of collecting cavities (8) are interconnected.

4. The Invar alloy grinding device according to claim 3, characterized in that: The negative pressure portion comprises a sealing ring (19) which is sealingly rotatably connected in the annular cavity (18), and a plurality of inclined blades (23) are fixedly mounted on the inner wall of the sealing ring (19), and a transmission gear ring (20) is fixedly mounted on the outer wall of the sealing ring (19), and a groove (21) which matches the transmission gear ring (20) is formed on the side wall of the rotating groove (17), and an inner gear ring (22) which meshes with the transmission gear ring (20) is fixedly mounted in the groove (21).

5. The Invar alloy grinding device according to claim 4, characterized in that: The sliding assembly is composed of an adjusting groove (24), an adjusting block (25), a screw rod (26) and a bevel gear (27); the adjusting groove (24) is formed on the yoke (3); the adjusting block (25) is slidably connected to the adjusting groove (24); the screw rod (26) is rotatably mounted in the adjusting groove (24); the screw rod (26) is threadably connected to the adjusting block (25); and the bevel gear (27) is fixedly mounted on one end of the screw rod (26) located outside the yoke (3).

6. The Invar alloy grinding device according to claim 5, characterized in that: The adjustment assembly consists of an adjustment ring (28), a connecting cavity (29), and a conical gear ring (30); the adjustment ring (28) is rotatably mounted on the side wall of the yoke (3); the connecting cavity (29) is formed on the inner wall of the adjustment ring (28), and the connecting cavity (29) corresponds to the position of a plurality of bevel gears (27); the conical gear ring (30) is fixedly mounted in the connecting cavity (29), and the conical gear ring (30) is meshed with the plurality of bevel gears (27).

7. An Invar alloy grinding device according to claim 6, characterized in that: An adjusting knob (32) is threadably mounted on the adjusting ring (28), and an insert rod is fixedly mounted on one end of the screw rod located in the connecting cavity (29). A plurality of insert holes (31) matching with the insert rods are formed on the side wall of the magnetic yoke (3).

8. The Invar alloy grinding device according to claim 7, characterized in that: The inner wall of the mounting ring (6) is provided with a plurality of plug-in grooves (33), and a plug-in seat (34) is plugged into each of the plug-in grooves (33). Each of the plug-in seats (34) is fixedly connected to a corresponding external grinding block (7). Two fixed blocks (35) are fixedly mounted on one end of each of the plug-in seats (34) away from the magnetic yoke (3). The mounting ring (6) is provided with a plurality of plug-in mechanisms that cooperate with the corresponding fixed blocks (35).

9. The Invar alloy grinding device according to claim 8, characterized in that: The plug-in mechanism is composed of a mounting block (36), a positioning rod (37), a pulling block (38) and a tension spring (39); the mounting block (36) is fixedly mounted on the side wall of the mounting ring (6); the positioning rod (37) is slidably mounted on the mounting block (36), and the positioning rod (37) and the fixed block (35) are also slidably matched; the pulling block (38) is fixedly mounted on the end of the positioning rod (37) away from the fixed block (35), and a tension spring (39) is installed between the pulling block (38) and the mounting block (36); a sealing plate (10) is installed on the end of the collecting chamber (8) away from the yoke (3); an air outlet is opened on the side wall of the annular chamber (18); and a filter is fixedly mounted on the end of the annular chamber (18) close to the collecting chamber (8).

10. An Invar alloy grinding method, using an Invar alloy grinding device as claimed in claim 9, characterized in that: The following steps are involved: S1: loading a grinding magnetic abrasive into an Invar alloy conduit (1) to be ground, passing the Invar alloy conduit (1) through a mounting plate (2) and fixing the Invar alloy conduit (1) while sealing both ends thereof, and adjusting the mounting plate (2) so that it is located at one end of the Invar alloy conduit (1); S2: Turn the adjusting knob (32) counterclockwise to separate the plug rod from the plug hole (31) to release the fixation of the position of the adjusting ring (28), then rotate the adjusting ring (28) to adjust the spacing between the plurality of magnetic poles (5) and the Invar alloy guide tube (1) at the same time, select an external grinding block (7) of corresponding size, and fix it on the mounting ring (6) by using the matching of the plug seat (34) and the plug slot (33), and fix the external grinding block (7) by using the matching of the positioning rod (37) and the fixing block (35); S3: starting the motor (14), and rotating the driving gear (15) and the matching magnetic yoke (3) of the fixed gear ring (13) on the mounting plate (2), so that the magnetic pole (5) drives the magnetic abrasive in the Invar alloy conduit (1) to rotate at the same time, and grinding the inside of the Invar alloy conduit (1) is achieved by friction with the inner wall of the Invar alloy conduit (1); S4: During the rotation of the magnetic yoke (3), the mounting ring (6) is driven by the connecting ring (11) and the T-ring (16) to rotate relative to the mounting plate (2). At this time, a plurality of external grinding blocks (7) mounted on the mounting ring (6) rotate relative to the side wall of the Invar alloy conduit (1) to grind the side wall thereof; S5: During the rotation of the mounting ring (6), the inner gear ring (22) cooperates with the transmission gear ring (20) to drive the sealing ring (19) to rotate in the annular cavity (18). At this time, the rotation of the plurality of inclined blades (23) discharges the air in the collection cavity (8), thereby generating negative pressure at the plurality of negative pressure holes (9) to collect the powder and debris generated during the external grinding process; S6: The rotation speed of the motor (14) and the travel speed of the mounting plate (2) relative to the Invar alloy tube (1) are controlled according to the grinding accuracy requirements, so as to grind the inner and outer surfaces of the entire Invar alloy tube (1) at the same time. After the grinding process is completed, the Invar alloy tube (1) is released and removed from the mounting plate (2), and then the magnetic abrasive is poured out and cleaned and recovered, and then the sealing plate (10) is removed to clean the powder and debris collected in the collection chamber (8).

Images