A large combined magnet assembly tool and its use method

Abstract

A large-scale combined magnet assembly tool and its use method, the assembly tool includes: a base and a synchronous centering device, the top of the base is fixedly connected to the bottom of the synchronous centering device, the synchronous centering device includes a bottom plate, a shell, a circular sleeve, a top plate, a turbine turntable, a worm, a slider and a pressure block, a circular sleeve is fixedly arranged on the inner circumference of the bottom of the shell, a top plate is fixedly arranged in the opening of the top of the shell, a through hole is opened in the middle of the top plate, the turbine turntable is rotatably sleeved on the circular sleeve, a plurality of corresponding slideways are opened on the top plate and the turbine turntable, each slider is arranged between the slideways, and the slider is fixedly connected to the end of the pressure block. This design can not only assemble large-scale combined strong magnets that cannot be operated by manpower, effectively improve the assembly accuracy of the combined magnet, but also can realize the limiting and assembly of each magnetic block through the pressure block bolts and T-bolts, avoiding safety accidents caused by manual assembly.

Description

Technical Field

[0001] The present invention relates to an assembly tool, in particular to a large-scale combined magnet assembly tool and a use method thereof, and is specifically applicable to a large-scale combined magnet assembly tool and a use method thereof which can realize high-precision assembly of multiple magnetic blocks. Background Art

[0002] Since the discovery of the third generation of permanent magnet materials (Nd-Fe-B), rare earth permanent magnet materials with intermetallic compounds formed by rare earth metal elements and transition metal elements as the main phase of the matrix have become the permanent magnet materials with the highest comprehensive performance known so far. Magnetic blocks made of rare earth materials have the advantages of strong magnetism and not easy to demagnetize. Large and powerful magnets with a weight greater than 50KG and a magnetic attraction greater than 1T are often required in industrial environments. Since single magnetic blocks are difficult to meet the demand, in order to obtain greater attraction, magnetic blocks of a certain size and magnetic force are generally combined together to form a combined magnet, and the demand for large magnetic force is achieved through the reasonable arrangement of each magnetic block.

[0003] Although the combined magnet can achieve a suction force that is difficult to achieve with a single magnet, it still has the following defects:

[0004] 1. Magnetic blocks made of rare earth materials have strong magnetic force and are difficult to assemble. They are difficult to operate by manpower. In addition, rare earth materials are fragile and easily damaged during assembly.

[0005] 2. Due to the huge magnetic force of the magnets, it is difficult to adjust them manually when the magnets are attracted to each other, and the assembly accuracy and integrity cannot be guaranteed.

[0006] 3. During the assembly process, magnetic blocks with different magnetic properties will attract each other at high speed, which may easily injure the operator and cause safety accidents. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art that the combined magnet assembly is difficult and the assembly accuracy and integrity cannot be guaranteed, and to provide a large-scale combined magnet assembly tool and a method of using the tool for high-precision assembly of multiple magnetic blocks.

[0008] To achieve the above objectives, the technical solution of the present invention is:

[0009] A large-scale combined magnet assembly tool and a method for using the same, the assembly tool is used to assemble a combined magnet, the combined magnet includes a magnet housing, a cover plate, a magnetic conductive plate, a cylindrical magnetic block and two semi-ring magnetic blocks, the magnet housing is a barrel-shaped structure, the magnetic conductive plate, the cylindrical magnetic block and the two semi-ring magnetic blocks are all arranged in the magnet housing, the outer diameter of the cylindrical magnetic block is the same as the inner diameter of the semi-ring magnetic block, the two semi-ring magnetic blocks are buckled to form a complete annular structure, the annular structure formed by the two semi-ring magnetic blocks is sleeved on the cylindrical magnetic block to form a complete combined magnetic block, the magnetic poles of the two semi-ring magnetic blocks are in the same direction, the magnetic poles of the cylindrical magnetic block and the two semi-ring magnetic blocks are in opposite directions, the magnetic conductive plate is arranged on the top of the combined magnetic block, the sum of the thickness of the magnetic conductive plate and the thickness of the combined magnetic block is less than the depth of the magnet housing, and a cover plate is fixedly arranged on the opening at the top of the magnet housing;

[0010] The assembly tool comprises: a base and a synchronous centering device, the top of the base is fixedly connected to the bottom of the synchronous centering device, and the synchronous centering device comprises a bottom plate, a shell, a circular sleeve, a top plate, a turbine turntable, a worm, a plurality of slide blocks and a plurality of pressure blocks,

[0011] A shell is fixedly arranged on the top of the bottom plate, and the shell is a barrel-shaped structure with a through hole at the bottom. A circular sleeve is fixedly arranged on the inner circumference of the bottom of the shell, and a top plate is fixedly arranged in the opening at the top of the shell. A through hole is opened in the middle of the top plate, and a plurality of first slideways are evenly arranged at the bottom of the top plate, and each first slideway is evenly arranged along the circumferential direction of the top plate. The diameters of the through holes opened on the shell and the top plate are the same as the outer diameter of the semi-ring magnetic block, and a turbine turntable is fixedly arranged in the shell.

[0012] The turbine turntable is sleeved on the annular sleeve, the turbine turntable and the annular sleeve are rotationally matched, the outer wall of the turbine turntable is transmission matched with the middle part of the worm, and the two ends of the worm pass through the shell and rotate with the shell.

[0013] The top of the turbine turntable is provided with a plurality of second slideways, one end of each second slideway is arranged near the inner circumference of the turbine turntable, and the other end of each second slideway is arranged near the outer circumference of the turbine turntable. The number of the sliders, the pressing block, the first slideway and the second slideway are the same. The bottom of each slider is respectively arranged in the second slideway on the turbine turntable, and the top of each slider is respectively arranged in the first slideway on the top plate.

[0014] Each slider is slidably matched with its corresponding first slideway and second slideway, and the top of each slider is fixedly connected to one end of a pressure block. The other end of the pressure block is a wedge-shaped structure, and the inclined surface of the pressure block is set upward. The end of the pressure block is limitedly matched with the side wall of the cylindrical magnetic block, and the bottom of the pressure block is limitedly matched with the top of the semi-annular magnetic block.

[0015] The assembly tool also includes a positioning and clamping device, which includes a magnetic isolation sleeve, a pressure strip, a pressure block bolt, two T-bolts and two connecting bolts. The magnetic isolation sleeve is an annular structure, and a plurality of through holes are evenly opened on the magnetic isolation sleeve along the axial direction. A guide cone with a larger diameter at the top and a smaller diameter at the bottom is opened on the inner wall of the top of the magnetic isolation sleeve. The inner diameter of the magnetic isolation sleeve is the same as the inner diameter of the semi-ring magnetic block. The pressure block bolt, two T-bolts and two connecting bolts are arranged on the pressure strip. After passing through the middle part of the pressure strip, the pressure block is fixedly connected to the top of the cylindrical pressure block. The bottom of the cylindrical pressure block is pressed and fitted with the top of the cylindrical magnetic block. The two T-bolts are respectively arranged on both sides of the pressure block bolt. After passing through the pressure strip, the two T-bolts are respectively pressed and fitted with the tops of the two semi-ring magnetic blocks. The two connecting bolts are respectively arranged at both ends of the pressure strip. After passing through the pressure strip and the through holes on the magnetic isolation sleeve, the two connecting bolts are threadedly connected to the top plate.

[0016] The synchronous centering device also includes multiple push rods, each of which is provided with a limit block with a diameter larger than the push rod body. Multiple pressure blocks are provided with through holes that match the push rod body. After each push rod passes through the through hole on the pressure block, it is matched with the side wall of the cylindrical magnetic block.

[0017] The positioning and clamping device also includes a cylindrical pressing block and two suction blocks. The two suction blocks are respectively fixedly arranged at the bottom of the T-bolt. The two suction blocks are arranged corresponding to the two semi-annular magnetic blocks. The cylindrical pressing block is arranged between the suction block and the semi-annular magnetic block.

[0018] An annular groove is provided on the top of the bottom plate, a boss is fixedly provided on the top of the bottom plate, the rotation centers of the annular groove and the boss coincide with each other, the diameter of the inner circumference of the annular groove is the same as the diameter of the boss, and the diameter of the boss is the same as the diameter of the cylindrical magnetic block.

[0019] The positioning and pressing device also includes a semi-ring gasket, which is inserted into and matched with the annular groove.

[0020] The magnet housing and the cover plate are made of duplex stainless steel, and the magnetic conductive plate is made of steel.

[0021] The magnetic isolation sleeve and the semi-ring gasket are made of non-magnetic conductive material.

[0022] A method for using a large combined magnet assembly tool, the method comprising:

[0023] The first step is to install the assembly tooling. The operator places the base on a flat ground. After the base is placed stably, the operator fixes the synchronous centering device on the top of the base. After the synchronous centering device is installed, the second step is to position the cylindrical magnetic block.

[0024] The second step is to position the cylindrical magnetic block. The operator rotates the worm and controls the turbine turntable to rotate on the annular sleeve through the worm, so that the slider drives the pressure block to slide along the first slideway to the outside of the synchronous centering device. When the pressure block moves to the outermost side of the synchronous centering device, the operator places the cylindrical magnetic block on the boss and inserts each push rod into the through hole on the pressure block. After the cylindrical magnetic block and the push rod are placed, the operator rotates the worm in the opposite direction, so that the slider drives the pressure block to slide along the first slideway to the inside of the synchronous centering device. At this time, the pressure block drives the push rod to move. When all the push rods are in contact with the side wall of the cylindrical magnetic block, the operator stops rotating the worm and takes out the push rod. After taking out the push rod, the operator Place the positioning and clamping device on the top of the synchronous centering device, and install the pressure strip on the top plate through the connecting bolts. When the pressure strip is installed, the operator rotates the worm to make the slider drive the pressure block to slide along the first slideway to the outside of the synchronous centering device. When the pressure block moves to the outermost side of the synchronous centering device, the operator rotates the pressure block bolt to make the cylindrical pressure block press the cylindrical magnetic block. After the cylindrical pressure block presses the cylindrical magnetic block, the operator inserts the semi-ring gasket into the annular groove. If the semi-ring gasket cannot be inserted into the annular groove, the diameter of the cylindrical magnetic block is too large. After replacing the cylindrical magnetic block, repeat the second step of positioning the cylindrical magnetic block. If the semi-ring gasket can be inserted into the annular groove, proceed to the third step of positioning the semi-ring magnetic block.

[0025] The third step is to position the half-ring magnetic blocks. The operator places the two half-ring magnetic blocks from both sides of the pressure strip into the shell so that the two half-ring magnetic blocks are aligned with the space between the cylindrical magnetic block and the shell. When the two half-ring magnetic blocks are placed in the installation position, the operator rotates the two T-bolts on the pressure strip in turn so that the T-bolts drive the suction block to move downward. At this time, the suction block pushes the two half-ring magnetic blocks to move downward. When the tops of the two half-ring magnetic blocks are flush with the tops of the cylindrical magnetic blocks, the positioning of the half-ring magnetic blocks is completed, and the fourth step of assembling the combined magnet is entered;

[0026] The fourth step is to assemble the combined magnet. The operator rotates the connecting bolts to remove the positioning and clamping device from the synchronous centering device. After the positioning and clamping device is removed, the operator rotates the worm to make the slider drive the pressure block to slide along the first slide to the inner side of the synchronous centering device until the wedge-shaped surface of the pressure block is located above the semi-ring magnetic block. At this time, the operator places the magnetic plate into the shell. After the magnetic plate is placed, the operator rotates the worm to make the slider drive the pressure block to slide along the first slide to the outer side of the synchronous centering device. At this time, the magnetic plate descends along the wedge-shaped surface on the pressure block until the magnetic plate fits with the semi-ring magnetic block. At this time, the operator buckles the magnet housing into the shell, and takes out the magnet housing, cylindrical magnetic block and two semi-ring magnetic blocks. When the magnet housing, cylindrical magnetic block and two semi-ring magnetic blocks are taken out, the operator installs the cover plate on the opening of the magnet housing. At this time, the combined magnet is assembled.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. A synchronous centering device in a large combined magnet assembly tool of the present invention comprises a shell, an annular sleeve, a top plate, a turbine turntable, a worm, a plurality of sliders and a plurality of pressing blocks. An annular sleeve is fixedly arranged on the inner circumference of the bottom of the shell, a top plate is fixedly arranged in the opening of the top of the shell, a through hole is opened in the middle of the top plate, a plurality of first slideways are evenly opened at the bottom of the top plate, and the first slideways are evenly arranged along the circumferential direction of the top plate, the turbine turntable is rotatably sleeved on the annular sleeve, the outer side wall of the turbine turntable is matched with the middle part of the worm, and the top of the turbine turntable is opened. A plurality of second slideways are provided, one end of each second slideway is arranged near the inner circumference of the turbine turntable, and the other end of each second slideway is arranged near the outer circumference of the turbine turntable. Each slider is arranged between the first slideway and the second slideway, and each slider is slidably matched with its corresponding first slideway and second slideway, so that the operator can control the turbine turntable to rotate on the annular sleeve through the worm. When the turbine turntable rotates, the slider is driven to cause the pressure block to reciprocate along the direction of the first slideway to push the cylindrical magnetic block into the central position of the shell, and at the same time, the semi-ring magnetic block can be limited. Therefore, the design can control each pressure block through the worm to push the cylindrical magnetic block into the central position of the shell, and at the same time, the semi-ring magnetic block can be limited, so as to assemble large combined strong magnets that cannot be operated by manpower, and effectively improve the assembly accuracy of the combined magnet.

[0029] 2. In the positioning and clamping device of a large combined magnet assembly tooling of the present invention, connecting bolts are provided on both sides of the pressure strip. The connecting bolts are threadedly connected to the top plate after passing through the magnetic isolation sleeve. A pressure block bolt and two T-bolts are provided in the middle of the pressure strip. A cylindrical pressure block is provided at the bottom of the pressure block bolt. The operator can control the lifting and lowering of the cylindrical pressure block by rotating the pressure block bolt, and then limit the cylindrical magnetic block. A suction block is provided at the bottom of the T-bolt. The operator can control the lifting and lowering of the suction block by rotating the T-bolt, and then press the semi-ring magnetic block into the installation position, so that the present invention can mechanically assemble the combined magnet and avoid safety accidents caused by manual assembly. Therefore, the design realizes the limiting and assembly of each magnetic block through the pressure block bolt and T-bolt, avoids safety accidents caused by manual assembly, and effectively improves the safety of the system.

[0030] 3. In a large combined magnet assembly tool of the present invention, a wedge-shaped surface is provided on the pressing block. When the operator installs the magnetic plate, the pressing block is located between the magnetic plate and the magnetic block to separate the magnetic plate from the magnetic block. When the operator drives each pressing block to open through the worm, the magnetic plate gradually descends along the wedge-shaped surface on the pressing block until the magnetic plate fits with the magnetic block, thereby avoiding the damage to the magnetic block caused by the rigid collision between the magnetic plate and the magnetic block. Therefore, the present design gradually fits the magnetic plate and the magnetic block through the wedge-shaped surface on the pressing block, thereby avoiding the damage to the magnetic block caused by the rigid collision between the magnetic plate and the magnetic block, thereby effectively improving the economy of the system assembly.

[0031] 4. In the method of using a large combined magnet assembly tool of the present invention, the operator rotates the two T-bolts on the pressure strip so that the T-bolts drive the suction block to move downward and press the two semi-ring magnetic blocks into the installation position. Due to the threaded connection between the T-bolts and the pressure strip, a larger pressure can be achieved with a smaller torque to adapt to the magnetic block with a larger magnetic force. Therefore, this design achieves a larger pressure through the threaded connection between the T-bolts and the pressure strip, so that the system can adapt to the magnetic block with a larger magnetic force, effectively improving the use range of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention.

[0033] Figure 2 It is a structural schematic diagram of the combined magnet in the present invention.

[0034] Figure 3 It is a cross-sectional view of the present invention.

[0035] Figure 4 yes Figure 1 Cross-sectional view of the synchronous centering device.

[0036] Figure 5 yes Figure 1 A cross-sectional view of the synchronous centering device from another angle.

[0037] Figure 6 yes Figure 1 Top view of the turbine turntable.

[0038] Figure 7 yes Figure 1 Cross-sectional view of the turbine disc.

[0039] In the figure: a combined strong magnet 1, a magnet housing 11, a cover plate 12, a magnetic conductive plate 13, a cylindrical magnetic block 14, a semi-ring magnetic block 15, a base 2, a synchronous centering device 3, a bottom plate 31, a shell 32, a circular sleeve 33, a top plate 34, a turbine turntable 35, a worm 36, a slider 37, a pressure block 38, a first slide 39, a second slide 30, a positioning and clamping device 4, a magnetic isolation sleeve 41, a pressure strip 42, a pressure block bolt 43, a T-bolt 44, a connecting bolt 45, a cylindrical pressure block 46, a suction block 47, a semi-ring gasket 48, an annular groove 5, a boss 6, and a push rod 7. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] See also Figures 1 to 7A large-scale combined magnet assembly tool, the assembly tool is used to assemble a combined magnet 1, the combined magnet 1 includes a magnet housing 11, a cover plate 12, a magnetic conductive plate 13, a cylindrical magnetic block 14 and two semi-ring magnetic blocks 15, the magnet housing 11 is a barrel-shaped structure, The magnetic conductive plate 13, the cylindrical magnetic block 14 and the two semi-ring magnetic blocks 15 are all arranged in the magnet housing 11. The outer diameter of the cylindrical magnetic block 14 is the same as the inner diameter of the semi-ring magnetic block 15. The two semi-ring magnetic blocks 15 are buckled to form a complete annular structure. The annular structure formed by the two semi-ring magnetic blocks 15 is sleeved on the cylindrical magnetic block 14 to form a complete combined magnetic block. The magnetic poles of the two semi-ring magnetic blocks 15 are in the same direction. The magnetic poles of the cylindrical magnetic block 14 and the two semi-ring magnetic blocks 15 are in opposite directions. The magnetic conductive plate 13 is arranged on the top of the combined magnetic block. The sum of the thickness of the magnetic conductive plate 13 and the thickness of the combined magnetic block is less than the depth of the magnet housing 11. A cover plate 12 is fixedly arranged on the opening at the top of the magnet housing 11.The assembly tool comprises: a base 2 and a synchronous centering device 3, the top of the base 2 is fixedly connected to the bottom of the synchronous centering device 3, the synchronous centering device 3 comprises a bottom plate 31, a shell 32, an annular sleeve 33, a top plate 34, a turbine turntable 35, a worm 36, a plurality of sliders 37 and a plurality of pressing blocks 38, the top of the bottom plate 31 is fixedly provided with a shell 32, the shell 32 is a barrel-shaped structure with a through hole at the bottom, the inner circumference of the bottom of the shell 32 is fixedly provided with an annular sleeve 33, the shell 3 A top plate 34 is fixedly arranged in the opening at the top of the housing 32. A through hole is opened in the middle of the top plate 34. A plurality of first slideways 39 are evenly arranged at the bottom of the top plate 34. Each first slideway 39 is evenly arranged along the circumferential direction of the top plate 34. The diameters of the through holes opened on the housing 32 and the top plate 34 are the same as the outer diameter of the semi-ring magnetic block 15. A turbine turntable 35 is fixedly arranged in the housing 32. The turbine turntable 35 is sleeved on the annular sleeve 33. The turbine turntable 35 and the annular sleeve 33 are rotatably matched. The outer wall of the turntable 35 is in driving cooperation with the middle part of the worm 36. The two ends of the worm 36 pass through the housing 32 and rotate with the housing 32. A plurality of second slideways 30 are provided on the top of the turbine turntable 35. One end of each second slideway 30 is arranged near the inner circumference of the turbine turntable 35, and the other end of each second slideway 30 is arranged near the outer circumference of the turbine turntable 35. The number of the sliders 37, the pressing blocks 38, the first slideways 39 and the second slideways 30 are the same. The bottoms of the sliders 37 are arranged on the turbine turntable 35. The top of each slider 37 is respectively arranged in the first slideway 39 on the top plate 34, and each slider 37 is slidably matched with its corresponding first slideway 39 and second slideway 30. The top of each slider 37 is fixedly connected to one end of a pressing block 38, and the other end of the pressing block 38 is a wedge-shaped structure. The inclined surface of the pressing block 38 is arranged upward, and the end of the pressing block 38 is limitedly matched with the side wall of the cylindrical magnetic block 14, and the bottom of the pressing block 38 is limitedly matched with the top of the semi-ring magnetic block 15. ;

[0042] The assembly tool also includes a positioning and clamping device 4, which includes a magnetic isolation sleeve 41, a pressure strip 42, a pressure block bolt 43, two T-bolts 44 and two connecting bolts 45. The magnetic isolation sleeve 41 is an annular structure, and a plurality of through holes are evenly opened on the magnetic isolation sleeve 41 along the axial direction. A guide cone with a larger diameter at the top and a smaller diameter at the bottom is opened on the inner wall of the top of the magnetic isolation sleeve 41. The inner diameter of the magnetic isolation sleeve 41 is the same as the inner diameter of the semi-ring magnetic block. The pressure block bolt 43, two T-bolts 44 and two connecting bolts 45 are provided on the pressure strip 42. The connecting bolt 45, the pressure block bolt 43 passes through the middle of the pressure strip 42 and is fixedly connected to the top of the cylindrical pressure block 46, the bottom of the cylindrical pressure block 46 is pressed and fitted with the top of the cylindrical magnetic block 14, and two T-bolts 44 are respectively arranged on both sides of the pressure block bolt 43. The two T-bolts 44 pass through the pressure strip 42 and are respectively pressed and fitted with the tops of the two semi-ring magnetic blocks 15. The two connecting bolts 45 are respectively arranged at both ends of the pressure strip 42. The two connecting bolts 45 pass through the pressure strip 42 and the through holes on the magnetic isolation sleeve 41 and are threadedly connected to the top plate 34.

[0043] The synchronous centering device 3 also includes multiple push rods 7, each of which is provided with a limit block with a diameter larger than the rod body of the push rod 7 on the top, and multiple pressure blocks 38 are provided with through holes that match the rod body of the push rod 7. After each push rod 7 passes through the through hole on the pressure block 38, it is matched with the side wall of the cylindrical magnetic block 14 for transmission.

[0044] The positioning and clamping device 4 also includes a cylindrical pressing block 46 and two suction blocks 47. The two suction blocks 47 are respectively fixed at the bottom of the T-bolt 44. The two suction blocks 47 are corresponding to the two semi-annular magnetic blocks 15. The cylindrical pressing block 46 is arranged between the suction block 47 and the semi-annular magnetic block 15.

[0045] An annular groove 5 is provided on the top of the bottom plate 31 , and a boss 6 is fixedly provided on the top of the bottom plate 31 . The rotation centers of the annular groove 5 and the boss 6 coincide with each other. The diameter of the inner circumference of the annular groove 5 is the same as the diameter of the boss 6 , and the diameter of the boss 6 is the same as the diameter of the cylindrical magnetic block 14 .

[0046] The positioning and pressing device 4 further comprises a semi-ring gasket 48 , and the semi-ring gasket 48 is inserted and matched with the annular groove 5 .

[0047] The magnet housing 11 and the cover plate 12 are made of duplex stainless steel, and the magnetic conductive plate 13 is made of steel.

[0048] The magnetic isolation sleeve 41 and the semi-ring gasket 48 are made of non-magnetic conductive material.

[0049] A method for using a large combined magnet assembly tool, the method comprising:

[0050] The first step is to install the assembly tool. The operator places the base 2 on a flat ground. After the base 2 is placed stably, the operator fixes the synchronous centering device 3 on the top of the base 2. After the synchronous centering device 3 is installed, the second step is to position the cylindrical magnetic block 14.

[0051] The second step is to position the cylindrical magnetic block 14. The operator rotates the worm 36 and controls the turbine turntable 35 to rotate on the annular sleeve 33 through the worm 36, so that the slider 37 drives the pressure block 38 to slide along the first slide 39 to the outside of the synchronous centering device 3. When the pressure block 38 moves to the outermost side of the synchronous centering device 3, the operator places the cylindrical magnetic block 14 on the boss 6 and inserts each push rod 7 into the through hole on the pressure block 38. After the cylindrical magnetic block 14 and the push rod 7 are placed, the operator rotates the worm 36 in the opposite direction, so that the slider 37 drives the pressure block 38 to slide along the first slide 39 to the inside of the synchronous centering device 3. At this time, the pressure block 38 drives the push rod 7 to move. When all the push rods 7 are in contact with the side wall of the cylindrical magnetic block 14, the operator stops rotating the worm 36 and takes out the push rod 7. After taking out the push rod 7, the operator The positioning and clamping device 4 is placed on the top of the synchronous centering device 3, and the pressure strip 42 is installed on the top plate 34 through the connecting bolts 45. When the pressure strip 42 is installed, the operator rotates the worm 36 to make the slider 37 drive the pressure block 38 to slide along the first slideway 39 to the outside of the synchronous centering device 3. When the pressure block 38 moves to the outermost side of the synchronous centering device 3, the operator rotates the pressure block bolt 43 to make the cylindrical pressure block 46 press the cylindrical magnetic block 14. After the cylindrical pressure block 46 presses the cylindrical magnetic block 14, the operator inserts the semi-ring gasket 48 into the annular groove 5. If the semi-ring gasket 48 cannot be inserted into the annular groove 5, the diameter of the cylindrical magnetic block 14 is too large. After replacing the cylindrical magnetic block 14, repeat the second step of positioning the cylindrical magnetic block 14. If the semi-ring gasket 48 can be inserted into the annular groove 5, proceed to the third step of positioning the semi-ring magnetic block 15.

[0052] The third step is to position the semi-ring magnetic blocks 15. The operator places the two semi-ring magnetic blocks 15 from both sides of the pressure strip 42 into the housing 32 so that the two semi-ring magnetic blocks 15 are aligned with the space between the cylindrical magnetic block 14 and the housing 32. When the two semi-ring magnetic blocks 15 are placed in the installation position, the operator rotates the two T-bolts 44 on the pressure strip 42 in sequence so that the T-bolts 44 drive the suction block 47 to move downward. At this time, the suction block 47 pushes the two semi-ring magnetic blocks 15 to move downward. When the tops of the two semi-ring magnetic blocks 15 are flush with the tops of the cylindrical magnetic blocks 14, the positioning of the semi-ring magnetic blocks 15 is completed, and the fourth step of assembling the combined magnet 1 is entered;

[0053] The fourth step is to assemble the combined magnet 1. The operator rotates the connecting bolt 45 to remove the positioning and clamping device 4 from the synchronous centering device 3. After the positioning and clamping device 4 is removed, the operator rotates the worm 36 to make the slider 37 drive the pressing block 38 to slide along the first slide 39 to the inner side of the synchronous centering device 3 until the wedge-shaped surface of the pressing block 38 is located above the semi-ring magnetic block 15. At this time, the operator places the magnetic plate 13 into the housing 32. After the magnetic plate 13 is placed, the operator rotates the worm 36 to make the slider 37 drive the pressing block 38 to slide along the first slide 39 to the inner side of the synchronous centering device 3. The block 38 slides along the first slide 39 toward the outside of the synchronous centering device 3. At this time, the magnetic plate 13 descends along the wedge surface on the pressing block 38 until the magnetic plate 13 fits with the semi-annular magnetic block 15. At this time, the operator buckles the magnet housing 11 into the shell 32 and takes out the magnet housing 11, the cylindrical magnetic block 14 and the two semi-annular magnetic blocks 15. After the magnet housing 11, the cylindrical magnetic block 14 and the two semi-annular magnetic blocks 15 are taken out, the operator installs the cover plate 12 on the opening of the magnet housing 11. At this time, the assembly of the combined magnet 1 is completed.

[0054] The principle of the present invention is described as follows:

[0055] In this design, in order to enhance the magnetic properties of one side of the combined magnet 1, a magnetic conductor can be attached to one side (pole).

[0056] The magnetic lines of force of a single permanent magnet are closed. In this design, two semi-ring magnetic blocks 15 are arranged on the outer circumference of the cylindrical magnetic block 14 to form a combined magnetic block. The magnetic poles of the two semi-ring magnetic blocks 15 are opposite to those of the cylindrical magnetic block 14. Such an arrangement can enhance the magnetism of the upper and lower end surfaces of the combined magnetic block.

[0057] By arranging two half-ring magnetic blocks 15 with opposite magnetic poles to the cylindrical magnetic block 14 on the cylindrical magnetic block 14, a magnetic extension carrier for combining the magnetic blocks is provided so that the magnetic force is enhanced on the side with the magnetic conductive block. Example

[0058] A large-scale combined magnet assembly tool, the assembly tool is used to assemble a combined magnet 1, the combined magnet 1 comprises a magnet housing 11, a cover plate 12, a magnetic conductive plate 13, a cylindrical magnetic block 14 and two semi-ring magnetic blocks 15, the magnet housing 11 is a barrel-shaped structure, The magnetic conductive plate 13, the cylindrical magnetic block 14 and the two semi-ring magnetic blocks 15 are all arranged in the magnet housing 11. The outer diameter of the cylindrical magnetic block 14 is the same as the inner diameter of the semi-ring magnetic block 15. The two semi-ring magnetic blocks 15 are buckled to form a complete annular structure. The annular structure formed by the two semi-ring magnetic blocks 15 is sleeved on the cylindrical magnetic block 14 to form a complete combined magnetic block. The magnetic poles of the two semi-ring magnetic blocks 15 are in the same direction. The magnetic poles of the cylindrical magnetic block 14 and the two semi-ring magnetic blocks 15 are in opposite directions. The magnetic conductive plate 13 is arranged on the top of the combined magnetic block. The sum of the thickness of the magnetic conductive plate 13 and the thickness of the combined magnetic block is less than the depth of the magnet housing 11. A cover plate 12 is fixedly arranged on the opening at the top of the magnet housing 11.The assembly tooling includes: a base 2 and a synchronous centering device 3, the top of the base 2 is fixedly connected to the bottom of the synchronous centering device 3, the synchronous centering device 3 includes a bottom plate 31, a shell 32, an annular sleeve 33, a top plate 34, a turbine turntable 35, a worm 36, a plurality of sliders 37 and a plurality of pressing blocks 38, the top of the bottom plate 31 is fixedly provided with a shell 32, the shell 32 is a barrel-shaped structure with a through hole at the bottom, the annular sleeve 33 is fixedly provided on the inner circumference of the bottom of the shell 32, the top plate 34 is fixedly provided in the opening at the top of the shell 32, the middle part of the top plate 34 is provided with a through hole, The bottom of the top plate 34 is evenly provided with a plurality of first slideways 39, each of which is evenly arranged along the circumferential direction of the top plate 34. The diameters of the through holes provided on the shell 32 and the top plate 34 are the same as the outer diameter of the semi-ring magnetic block 15. A turbine turntable 35 is fixedly provided in the shell 32, and the turbine turntable 35 is sleeved on the annular sleeve 33. The turbine turntable 35 is rotatably matched with the annular sleeve 33, and the outer wall of the turbine turntable 35 is transmission-matched with the middle part of the worm 36. The two ends of the worm 36 pass through the housing 32 and rotate with the housing 32. The top of the turbine turntable 35 is provided with a plurality of second slideways 30. One end of each second slideway 30 is arranged near the inner circumference of the turbine turntable 35, and the other end of each second slideway 30 is arranged near the outer circumference of the turbine turntable 35. The number of the sliders 37, the pressing blocks 38, the first slideways 39 and the second slideways 30 are the same. The bottom of each slider 37 is respectively arranged in the second slideway 30 on the turbine turntable 35. The tops of the sliders 37 are respectively arranged in the first slideways 39 on the top plate 34, and each slider 37 is slidably matched with the corresponding first slideway 39 and the second slideway 30. The top of each slider 37 is fixedly connected to one end of a pressing block 38, and the other end of the pressing block 38 is a wedge-shaped structure. The inclined surface of the pressing block 38 is arranged upward, and the end of the pressing block 38 is limitedly matched with the side wall of the cylindrical magnetic block 14, and the bottom of the pressing block 38 is limitedly matched with the top of the semi-ring magnetic block 15;The assembly tool also includes a positioning and clamping device 4, which includes a magnetic isolation sleeve 41, a pressure strip 42, a pressure block bolt 43, two T-bolts 44 and two connecting bolts 45. The magnetic isolation sleeve 41 is an annular structure, and a plurality of through holes are evenly opened on the magnetic isolation sleeve 41 along the axial direction. A guide cone with a larger diameter at the top and a smaller diameter at the bottom is opened on the inner wall of the top of the magnetic isolation sleeve 41. The inner diameter of the magnetic isolation sleeve 41 is the same as the inner diameter of the semi-ring magnetic block. The pressure strip 42 is provided with A pressure block bolt 43, two T-bolts 44 and two connecting bolts 45, the pressure block bolt 43 passes through the middle of the pressure strip 42 and is fixedly connected to the top of the cylindrical pressure block 46, the bottom of the cylindrical pressure block 46 is tightly fitted with the top of the cylindrical magnetic block 14, the two T-bolts 44 are respectively arranged on both sides of the pressure block bolt 43, the two T-bolts 44 pass through the pressure strip 42 and are respectively tightly fitted with the tops of the two semi-ring magnetic blocks 15, the two connecting bolts 45 are respectively arranged at both ends of the pressure strip 42, and the two The connecting bolt 45 passes through the pressure strip 42 and the through hole on the magnetic isolation sleeve 41 and is threadedly connected to the top plate 34; the synchronous centering device 3 also includes a plurality of push rods 7, each of which is provided with a limit block with a diameter larger than the rod body of the push rod 7 on the top, and a plurality of pressure blocks 38 are provided with through holes that match the rod body of the push rod 7, and each push rod 7 passes through the through hole on the pressure block 38 and is transmission-matched with the side wall of the cylindrical magnetic block 14; the positioning and clamping device 4 also includes a cylindrical pressure block 46 and two suction blocks 47, the two suction blocks The force blocks 47 are fixedly arranged at the bottom of the T-bolt 44, respectively. The two suction blocks 47 are arranged corresponding to the two semi-ring magnetic blocks 15, and the cylindrical pressure block 46 is arranged between the suction block 47 and the semi-ring magnetic block 15; the top of the bottom plate 31 is provided with an annular groove 5, and the top of the bottom plate 31 is fixedly provided with a boss 6, the rotation centers of the annular groove 5 and the boss 6 coincide, the diameter of the inner circumference of the annular groove 5 is the same as the diameter of the boss 6, and the diameter of the boss 6 is the same as the diameter of the cylindrical magnetic block 14. ;

[0059] A method for using a large combined magnet assembly tool, the method comprising:

[0060] The first step is to install the assembly tool. The operator places the base 2 on a flat ground. After the base 2 is placed stably, the operator fixes the synchronous centering device 3 on the top of the base 2. After the synchronous centering device 3 is installed, the second step is to position the cylindrical magnetic block 14.

[0061] The second step is to position the cylindrical magnetic block 14. The operator rotates the worm 36 and controls the turbine turntable 35 to rotate on the annular sleeve 33 through the worm 36, so that the slider 37 drives the pressure block 38 to slide along the first slide 39 to the outside of the synchronous centering device 3. When the pressure block 38 moves to the outermost side of the synchronous centering device 3, the operator places the cylindrical magnetic block 14 on the boss 6 and inserts each push rod 7 into the through hole on the pressure block 38. After the cylindrical magnetic block 14 and the push rod 7 are placed, the operator rotates the worm 36 in the opposite direction, so that the slider 37 drives the pressure block 38 to slide along the first slide 39 to the inside of the synchronous centering device 3. At this time, the pressure block 38 drives the push rod 7 to move. When all the push rods 7 are in contact with the side wall of the cylindrical magnetic block 14, the operator stops rotating the worm 36 and takes out the push rod 7. After taking out the push rod 7, the operator The positioning and clamping device 4 is placed on the top of the synchronous centering device 3, and the pressure strip 42 is installed on the top plate 34 through the connecting bolts 45. When the pressure strip 42 is installed, the operator rotates the worm 36 to make the slider 37 drive the pressure block 38 to slide along the first slideway 39 to the outside of the synchronous centering device 3. When the pressure block 38 moves to the outermost side of the synchronous centering device 3, the operator rotates the pressure block bolt 43 to make the cylindrical pressure block 46 press the cylindrical magnetic block 14. After the cylindrical pressure block 46 presses the cylindrical magnetic block 14, the operator inserts the semi-ring gasket 48 into the annular groove 5. If the semi-ring gasket 48 cannot be inserted into the annular groove 5, the diameter of the cylindrical magnetic block 14 is too large. After replacing the cylindrical magnetic block 14, repeat the second step of positioning the cylindrical magnetic block 14. If the semi-ring gasket 48 can be inserted into the annular groove 5, proceed to the third step of positioning the semi-ring magnetic block 15.

[0062] The third step is to position the semi-ring magnetic blocks 15. The operator places the two semi-ring magnetic blocks 15 from both sides of the pressure strip 42 into the housing 32 so that the two semi-ring magnetic blocks 15 are aligned with the space between the cylindrical magnetic block 14 and the housing 32. When the two semi-ring magnetic blocks 15 are placed in the installation position, the operator rotates the two T-bolts 44 on the pressure strip 42 in sequence so that the T-bolts 44 drive the suction block 47 to move downward. At this time, the suction block 47 pushes the two semi-ring magnetic blocks 15 to move downward. When the tops of the two semi-ring magnetic blocks 15 are flush with the tops of the cylindrical magnetic blocks 14, the positioning of the semi-ring magnetic blocks 15 is completed, and the fourth step of assembling the combined magnet 1 is entered;

[0063] The fourth step is to assemble the combined magnet 1. The operator rotates the connecting bolt 45 to remove the positioning and clamping device 4 from the synchronous centering device 3. After the positioning and clamping device 4 is removed, the operator rotates the worm 36 to make the slider 37 drive the pressing block 38 to slide along the first slide 39 to the inner side of the synchronous centering device 3 until the wedge-shaped surface of the pressing block 38 is located above the semi-ring magnetic block 15. At this time, the operator places the magnetic plate 13 into the housing 32. After the magnetic plate 13 is placed, the operator rotates the worm 36 to make the slider 37 drive the pressing block 38 to slide along the first slide 39 to the inner side of the synchronous centering device 3. The block 38 slides along the first slide 39 toward the outside of the synchronous centering device 3. At this time, the magnetic plate 13 descends along the wedge surface on the pressing block 38 until the magnetic plate 13 fits with the semi-annular magnetic block 15. At this time, the operator buckles the magnet housing 11 into the shell 32 and takes out the magnet housing 11, the cylindrical magnetic block 14 and the two semi-annular magnetic blocks 15. After the magnet housing 11, the cylindrical magnetic block 14 and the two semi-annular magnetic blocks 15 are taken out, the operator installs the cover plate 12 on the opening of the magnet housing 11. At this time, the assembly of the combined magnet 1 is completed. Example

[0064] Embodiment 2 is substantially the same as Embodiment 1, except that:

[0065] The positioning and pressing device 4 further comprises a semi-ring gasket 48 , and the semi-ring gasket 48 is inserted and matched with the annular groove 5 . Example

[0066] Embodiment 3 is substantially the same as Embodiment 2, except that:

[0067] The magnetic isolation sleeve 41 and the semi-ring gasket 48 are made of non-magnetic conductive materials; the magnet housing 11 and the cover plate 12 are made of duplex stainless steel, and the magnetic conductive plate 13 is made of steel.

Claims

1. A large modular magnet assembly tool, characterized in that: The assembly tool is used to assemble a combined magnet (1), the combined magnet (1) comprising a magnet housing (11), a cover plate (12), a magnetic conductive plate (13), a cylindrical magnetic block (14) and two semi-annular magnetic blocks (15), the magnet housing (11) being a barrel-shaped structure, the magnetic conductive plate (13), the cylindrical magnetic block (14) and the two semi-annular magnetic blocks (15) being arranged in the magnet housing (11), the outer diameter of the cylindrical magnetic block (14) being the same as the inner diameter of the semi-annular magnetic block (15), and the two semi-annular magnetic blocks (15) being buckled together to form a complete The annular structure is formed by two semi-annular magnetic blocks (15) which are sleeved on the cylindrical magnetic block (14) to form a complete combined magnetic block. The magnetic poles of the two semi-annular magnetic blocks (15) are in the same direction, and the magnetic poles of the cylindrical magnetic block (14) and the two semi-annular magnetic blocks (15) are in opposite directions. The magnetic conductive plate (13) is arranged on the top of the combined magnetic block. The sum of the thickness of the magnetic conductive plate (13) and the thickness of the combined magnetic block is less than the depth of the magnet housing (11). A cover plate (12) is fixedly arranged on the opening at the top of the magnet housing (11); The assembly tool comprises: a base (2) and a synchronous centering device (3), the top of the base (2) being fixedly connected to the bottom of the synchronous centering device (3), the synchronous centering device (3) comprising a bottom plate (31), a shell (32), a circular sleeve (33), a top plate (34), a turbine turntable (35), a worm (36), a plurality of sliders (37) and a plurality of pressure blocks (38), the top of the bottom plate (31) being fixedly provided with a shell (32), the shell (32) being a barrel-shaped structure with a through hole at the bottom, the circular sleeve (33) being fixedly provided on the inner circumference of the bottom of the shell (32), the top plate (34) being fixedly provided in the opening at the top of the shell (32), the middle portion of the top plate (34) being provided with a through hole. The top plate (34) has a plurality of first slideways (39) uniformly formed at the bottom thereof, each of the first slideways (39) being uniformly arranged along the circumferential direction of the top plate (34); the diameters of the through holes formed on the shell (32) and the top plate (34) are the same as the outer diameter of the semi-ring magnetic block (15); a turbine turntable (35) is fixedly arranged in the shell (32); the turbine turntable (35) is sleeved on the annular sleeve (33); the turbine turntable (35) and the annular sleeve (33) are rotatably matched; the outer wall of the turbine turntable (35) is transmission matched with the middle part of the worm (36); The two ends of the worm (36) pass through the housing (32) and rotate with the housing (32). A plurality of second slideways (30) are provided on the top of the turbine turntable (35). One end of each second slideway (30) is arranged near the inner circumference of the turbine turntable (35), and the other end of each second slideway (30) is arranged near the outer circumference of the turbine turntable (35). The number of the sliders (37), the pressure blocks (38), the first slideways (39) and the second slideways (30) are the same. The bottom of each slider (37) is respectively arranged on the second slideway (30) on the turbine turntable (35). The top of each slider (37) is respectively arranged in a first slideway (39) on the top plate (34), and each slider (37) is slidably matched with its corresponding first slideway (39) and second slideway (30). The top of each slider (37) is fixedly connected to one end of a pressing block (38), and the other end of the pressing block (38) is a wedge-shaped structure. The inclined surface of the pressing block (38) is arranged upward, and the end of the pressing block (38) is limitedly matched with the side wall of the cylindrical magnetic block (14), and the bottom of the pressing block (38) is limitedly matched with the top of the semi-annular magnetic block (15).

2. A large combined magnet assembly tool according to claim 1, characterized in that: The assembly tool also includes a positioning and clamping device (4), which includes a magnetic isolation sleeve (41), a pressure strip (42), a pressure block bolt (43), two T-bolts (44) and two connecting bolts (45). The magnetic isolation sleeve (41) is an annular structure. A plurality of through holes are evenly provided on the magnetic isolation sleeve (41) along the axial direction. A guide cone with a larger diameter at the top and smaller diameter at the bottom is provided on the inner wall of the top of the magnetic isolation sleeve (41). The inner diameter of the magnetic isolation sleeve (41) is the same as the inner diameter of the semi-ring magnetic block. The pressure block bolt (43), two T-bolts (44) and two connecting bolts (45) are provided on the pressure strip (42). The pressure block bolt (43) passes through the middle of the pressure strip (42) and is fixedly connected to the top of the cylindrical pressure block (46). The bottom of the cylindrical pressure block (46) is tightly fitted with the top of the cylindrical magnetic block (14). Two T-bolts (44) are respectively arranged on both sides of the pressure block bolt (43). The two T-bolts (44) pass through the pressure strip (42) and are tightly fitted with the tops of the two semi-annular magnetic blocks (15). Two connecting bolts (45) are respectively arranged at both ends of the pressure strip (42). The two connecting bolts (45) pass through the pressure strip (42) and the through holes on the magnetic isolation sleeve (41) and are threadedly connected to the top plate (34).

3. A large combined magnet assembly tool according to claim 2, characterized in that: The synchronous centering device (3) further comprises a plurality of push rods (7), each push rod (7) being provided with a limit block having a diameter larger than the rod body of the push rod (7) at the top thereof, a plurality of pressure blocks (38) being provided with through holes cooperating with the rod bodies of the push rods (7), and each push rod (7) being transmitted and matched with the side wall of the cylindrical magnetic block (14) after passing through the through holes on the pressure blocks (38).

4. A large combined magnet assembly tool according to claim 3, characterized in that: The positioning and clamping device (4) further comprises a cylindrical pressing block (46) and two suction blocks (47), wherein the two suction blocks (47) are respectively fixedly arranged at the bottom of the T-bolt (44), the two suction blocks (47) are arranged corresponding to the two semi-annular magnetic blocks (15), and the cylindrical pressing block (46) is arranged between the suction blocks (47) and the semi-annular magnetic blocks (15).

5. A large combined magnet assembly tool according to claim 4, characterized in that: An annular groove (5) is provided on the top of the bottom plate (31), a boss (6) is fixedly provided on the top of the bottom plate (31), the rotation centers of the annular groove (5) and the boss (6) coincide with each other, the diameter of the inner circumference of the annular groove (5) is the same as the diameter of the boss (6), and the diameter of the boss (6) is the same as the diameter of the cylindrical magnetic block (14).

6. A large combined magnet assembly tool according to claim 5, characterized in that: The positioning and pressing device (4) further comprises a semi-ring gasket (48), wherein the semi-ring gasket (48) is inserted into and matched with the annular groove (5).

7. A large combined magnet assembly tool according to claim 6, characterized in that: The magnet housing (11) and the cover plate (12) are made of duplex stainless steel, and the magnetic conductive plate (13) is made of steel.

8. A large combined magnet assembly tool according to claim 7, characterized in that: The magnetic isolation sleeve (41) and the semi-ring gasket (48) are made of non-magnetic conductive material.

9. A method for using the large combined magnet assembly tool according to claim 8, characterized in that: The method of use includes: The first step is to install the assembly tool. The operator places the base (2) on a flat ground. After the base (2) is placed stably, the operator fixes the synchronous centering device (3) on the top of the base (2). After the synchronous centering device (3) is installed, the second step is to position the cylindrical magnetic block (14). In the second step, the cylindrical magnetic block (14) is positioned. The operator rotates the worm (36) to control the turbine turntable (35) to rotate on the annular sleeve (33) through the worm (36), so that the slider (37) drives the pressing block (38) to slide along the first slideway (39) toward the outer side of the synchronous centering device (3). When the pressing block (38) moves to the outermost side of the synchronous centering device (3), the operator places the cylindrical magnetic block (14) on the boss (6) and inserts each push rod (7) into the pressing block (38). ) in the through hole on the cylindrical magnetic block (14) and the push rod (7) are placed, the operator rotates the worm (36) in the opposite direction, so that the slider (37) drives the pressure block (38) to slide along the first slideway (39) toward the inner side of the synchronous centering device (3), and the pressure block (38) drives the push rod (7) to move. When all the push rods (7) are in contact with the side wall of the cylindrical magnetic block (14), the operator stops rotating the worm (36) and takes out the push rod (7). After taking out the push rod (7), the operator The positioning and clamping device (4) is placed on the top of the synchronous centering device (3), and the pressure strip (42) is installed on the top plate (34) through the connecting bolt (45). When the pressure strip (42) is installed, the operator rotates the worm (36) so that the slider (37) drives the pressure block (38) to slide along the first slideway (39) toward the outside of the synchronous centering device (3). When the pressure block (38) moves to the outermost side of the synchronous centering device (3), the operator rotates the pressure block bolt (43) so that the cylindrical pressure block (46) pressing the cylindrical magnetic block (14). After the cylindrical pressing block (46) presses the cylindrical magnetic block (14), the operator inserts the semi-ring gasket (48) into the annular groove (5). If the semi-ring gasket (48) cannot be inserted into the annular groove (5), the diameter of the cylindrical magnetic block (14) is too large. After replacing the cylindrical magnetic block (14), repeat the second step of positioning the cylindrical magnetic block (14). If the semi-ring gasket (48) can be inserted into the annular groove (5), proceed to the third step of positioning the semi-ring magnetic block (15); The third step is to position the semi-ring magnetic blocks (15). The operator places the two semi-ring magnetic blocks (15) from both sides of the pressure strip (42) into the housing (32) so that the two semi-ring magnetic blocks (15) are aligned with the space between the cylindrical magnetic block (14) and the housing (32). When the two semi-ring magnetic blocks (15) are placed in the installation position, the operator rotates the two T-bolts (44) on the pressure strip (42) in sequence so that the T-bolts (44) drive the suction block (47) to move downward. At this time, the suction block (47) pushes the two semi-ring magnetic blocks (15) to move downward. When the tops of the two semi-ring magnetic blocks (15) are flush with the tops of the cylindrical magnetic blocks (14), the positioning of the semi-ring magnetic blocks (15) is completed, and the fourth step of assembling the combined magnet (1) is entered; The fourth step is to assemble the combined magnet (1). The operator rotates the connecting bolt (45) to remove the positioning and clamping device (4) from the synchronous centering device (3). After the positioning and clamping device (4) is removed, the operator rotates the worm (36) to make the slider (37) drive the pressing block (38) to slide along the first slideway (39) toward the inner side of the synchronous centering device (3) until the wedge-shaped surface of the pressing block (38) is located above the semi-ring magnetic block (15). At this time, the operator places the magnetic plate (13) into the housing (32). After the magnetic plate (13) is placed, the operator rotates the worm (36) to make the slider (37) drive the pressing block (38) slides along the first slideway (39) toward the outside of the synchronous centering device (3), at which time the magnetic plate (13) descends along the wedge-shaped surface on the pressure block (38) until the magnetic plate (13) fits with the semi-annular magnetic block (15). At this time, the operator buckles the magnet housing (11) into the shell (32) and takes out the magnet housing (11), the cylindrical magnetic block (14) and the two semi-annular magnetic blocks (15). After the magnet housing (11), the cylindrical magnetic block (14) and the two semi-annular magnetic blocks (15) are taken out, the operator installs the cover plate (12) on the opening of the magnet housing (11), and the assembly of the combined magnet (1) is completed.

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