A pressing head structure and pressing method for motor position magnetic steel pressing

Abstract

The utility model provides a kind of for motor position magnetic steel press mounting pressure head structure and press mounting method, belong to servo press mounting technical field, wherein, press mounting structure includes rack, motor and pressure head are installed respectively at rack bottom and top, position magnetic steel is placed on motor by auxiliary sleeve, pressure head is the T type structure made of non-magnetic material, adjustable height proximity switch is connected with the lateral wall of pressure head, the outer sleeve of pressure head is equipped with three-jaw sliding sleeve, pressure head is also connected with stop block, pressure head is driven by servo electric cylinder to move up and down, servo electric cylinder is connected with grating displacement sensor.Press mounting method includes installing motor and position magnetic steel and centering, debugging the position of proximity switch, carries out press mounting debugging, determines the distance between position magnetic steel and positioning reference surface h when the displacement S of lower pressure and press mounting four steps.The utility model can guarantee the consistency and press mounting precision of product press mounting, effectively improve production rhythm and production efficiency, reduce the work intensity of staff.

Description

Technical Field

[0001] This invention belongs to the field of servo press-fitting technology, and relates to the press-fitting technology of motor position magnets, and in particular to a press head structure and press-fitting method for press-fitting motor position magnets. Background Technology

[0002] The press-fitting principle of a servo press typically involves a pressure sensor detecting a pressure surge during workpiece press-fitting to indicate successful press-fitting. This is achieved when the workpiece is pressed against the target workpiece's stop surface. However, when press-fitting the motor position magnets onto the motor shaft, it's required that the distance *h* between the position magnet and the motor housing's positioning reference surface for each motor be guaranteed. However, due to the cumulative assembly error of each motor, simply monitoring the pressure surge after the position magnet has pressed against the motor shaft's stop surface cannot determine successful press-fitting; this would compromise the accuracy of the *h* value.

[0003] Therefore, a tooling structure needs to be designed that can dynamically identify the current position of each motor during pressing, and monitor the pressing displacement through a displacement sensor to ensure the h value of the position magnet after pressing. Previously, the above problems were solved by manual pressing, which involved measuring the h value, resulting in low efficiency, poor accuracy, and inability to guarantee production cycle time.

[0004] Therefore, in order to solve these problems, the present invention proposes a press head structure and press method for pressing magnets for motor positions. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a pressing head structure and pressing method for pressing motor position magnets, so as to solve the technical problem that the manual measurement of h value in the prior art results in low efficiency and poor accuracy of h value measurement after pressing motor position magnets.

[0006] To achieve the above and other related objectives, the present invention provides a pressing head structure for pressing a position magnet for a motor, comprising a frame, a motor mounted at the bottom of the frame, a position magnet placed on the motor via an auxiliary sleeve, a pressing head located at the middle of the upper end of the frame, the pressing head being a T-shaped structure made of non-magnetic material, an adjustable-height proximity switch connected to the horizontal end sidewall of the pressing head, a three-jaw sliding sleeve that can move up and down along the length of the pressing head being fitted onto the vertical section of the pressing head, a stop block connected to the lower end of the vertical end of the pressing head, and the pressing head being driven up and down by a servo electric cylinder, the servo electric cylinder being connected to a grating displacement sensor.

[0007] Preferably, in any of the above embodiments, the bottom of the frame is provided with a T-slot platform, an adjustable platform is connected to the T-slot platform, and a motor mounting base is connected to the adjustable platform.

[0008] In any of the above embodiments, it is preferred that the upper surface of the motor mounting base is recessed downward to form a slot, and the motor is placed on the motor mounting base with the motor shaft extending into the slot.

[0009] Preferably, in any of the above embodiments, a motor anti-rotation stop is detachably connected to the adjustable platform, and the other end of the motor anti-rotation stop contacts the side surface of the motor body.

[0010] In any of the above embodiments, it is preferred that the horizontal end sidewall of the pressure head is connected to a height-adjustable mounting plate, the lower end of the mounting plate is bent horizontally and then vertically to form a mounting part, the proximity switch is mounted on the mounting part and the output end of the proximity switch is directly opposite the upper end face of the three-jaw sliding sleeve.

[0011] In any of the above embodiments, it is preferred that the vertical section of the pressure head is fitted with a spring, and the spring is disposed between the horizontal end of the pressure head and the three-jaw sliding sleeve.

[0012] In any of the above embodiments, the preferred embodiment is that the three-jaw sliding sleeve includes an integrally formed three-jaw base and a sleeve connected to the three-jaw base. The inner wall of the sleeve is provided with a groove along its height direction, and an anti-rotation positioning block is provided in the groove.

[0013] In any of the above embodiments, it is preferred that two guide columns are connected to the frame, and a baffle that can move up and down along the length of the guide columns is fitted on the two guide columns. The center of the upper surface of the baffle is fixedly connected to the output shaft of the servo electric cylinder through a connecting seat. A pressure sensor is fixedly connected to the center of the lower surface of the baffle. A die head is connected to the pressure sensor. The upper end of the pressure head is inserted into the die shank hole of the die head and then fastened by radial bolts.

[0014] A pressing method for pressing motor position magnets includes the following steps:

[0015] S1. Install the motor and the positioning magnet respectively, and align the positioning magnet with the center of the pressure head;

[0016] S2. Adjust the position of the proximity switch so that the proximity switch is triggered just as the three-jaw sliding sleeve contacts the positioning reference surface;

[0017] S3. Perform press-fitting and debugging to determine the downward displacement S when the distance between the position magnet and the positioning reference surface is h;

[0018] S4. Pressing: After installing the magnet to be pressed, start the servo electric cylinder for pressing. During the pressing process, the grating displacement sensor detects the displacement in real time. When the output shaft of the servo electric cylinder presses down by a displacement S from zero, the servo electric cylinder stops, the pressing is completed, and the pressing head returns to its original position.

[0019] In any of the above schemes, the preferred method is as follows: in S3, the specific method of press-fit debugging is as follows: the proximity switch trigger signal starts to calculate the pressing displacement. It is obtained through multiple press-fit tests. Each time, a certain displacement is pressed down, and the distance between the position magnet and the positioning reference surface is tested. The pressing displacement is gradually increased until the distance between the position magnet and the positioning reference surface is measured to be h. At this time, the pressing displacement is determined as the final pressing displacement S.

[0020] As described above, the press head structure and press method for pressing motor position magnets according to the present invention have the following beneficial effects:

[0021] 1. In this invention, servo press fitting is used, and precise control is achieved through a grating displacement sensor, which can ensure the consistency and accuracy of product press fitting, thereby improving product quality.

[0022] 2. In this invention, the manual measurement process is reduced, thereby effectively improving production cycle and efficiency, and reducing the workload of workers. Attached Figure Description

[0023] Figure 1 The diagram shown is a schematic representation of the present invention.

[0024] Figure 2 The diagram shows the position magnets after they have been press-fitted.

[0025] Figure 3 This is a schematic diagram of the pressing area.

[0026] Figure 4 The diagram shown is of the pressure head.

[0027] Figure 5 The diagram shown is of a three-jaw sliding sleeve.

[0028] Component designation explanation

[0029] 1-Frame; 2-Motor; 201-Motor shaft; 202-Positioning reference surface; 203-Motor body side profile; 3-Auxiliary sleeve; 4-Pressure head; 5-Three-jaw sliding sleeve; 501-Three-jaw base; 502-Sleeve; 503-Mounting groove; 504-Anti-rotation positioning block; 6-Stop block; 7-Servo electric cylinder; 8-Grate displacement sensor; 9-Proximity switch; 10-T-slot platform; 11-Adjustable platform; 12-Motor mounting base; 121-Bottom disc; 122-Mounting column; 123-Slot; 13-Motor anti-rotation stop; 131-Connecting part; 132-Stop part; 14-Mounting plate; 141-Waist hole; 142-Mounting part; 15-Spring; 16-Guide column; 17-Baffle; 18-Pressure sensor; 19-Die head; 20-Linear bearing; 21-Connecting base; 22-Position magnet. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0031] Please see Figures 1 to 5 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0032] Please see Figures 1-5

[0033] Example 1

[0034] This invention provides a press head structure for pressing a position magnet for a motor, including a frame 1. A motor 2 is mounted at the bottom of the frame 1. Since the position magnet 22 cannot be placed stably on the motor shaft 201, an auxiliary sleeve 3 is designed in this embodiment. The position magnet 22 is placed in the auxiliary sleeve 3 for auxiliary positioning, so that the position magnet 22 can be placed stably on the motor shaft 201 of the motor 2.

[0035] The upper middle part of the frame 1 is provided with a pressure head 4. The pressure head 4 is a T-shaped structure made of non-magnetic material. The horizontal end side wall of the pressure head 4 is connected to an adjustable height proximity switch 9. The vertical section of the pressure head 4 is fitted with a three-jaw sliding sleeve 5 that can move up and down along the length of the pressure head 4. The lower end of the vertical end of the pressure head 4 is fastened with a stop block 6 by screws to block the three-jaw sliding sleeve 5 and prevent the three-jaw sliding sleeve 5 from falling off.

[0036] The pressure head 4 is driven to move up and down by a servo electric cylinder 7. A grating displacement sensor 8 is connected to the servo electric cylinder 7. When the proximity switch 9 is triggered, the grating displacement sensor 8 starts to calculate the displacement.

[0037] During operation, before pressing, the motor 2 is installed and positioned, then the auxiliary sleeve 3 is placed on the motor 2, and the position magnet 22 is placed inside the auxiliary sleeve 3 for auxiliary positioning. During pressing, the three-jaw sliding sleeve 5 on the pressing head 4 first contacts the positioning reference surface 202. The three-jaw sliding sleeve 5 moves upward along the pressing head 4. When the upper end surface of the three-jaw sliding sleeve 5 triggers the proximity switch 9, it gives a signal, and the grating displacement sensor 8 starts to calculate the displacement. The pressing head 4 continues to press down on the position magnet 22, and the position magnet 22 is slowly pressed into the motor shaft 201. The grating displacement sensor 8 detects the displacement in real time. After pressing down the set displacement amount, the motor 2 stops, the pressing is completed, and the pressing head 4 returns to its original position. At this time, the distance between the surface of the position magnet 22 and the positioning reference surface 202 can be guaranteed to be h.

[0038] In this embodiment, since the position magnet 22 is magnetic, in order to avoid the position magnet 22 being magnetically attracted by the pressure head 4 during pressing and causing pressing failure, both the pressure head 4 and the stop block 6 are made of non-magnetic materials such as 304 stainless steel.

[0039] As a further description of the above embodiment, in order to facilitate the adjustment of the position of the motor 2 so that the center of the motor shaft 201 is aligned with the center of the press head 4 and to ensure the pressing accuracy, in this embodiment, a T-slot platform 10 is fixedly connected to the bottom of the frame 1, an adjustable platform 11 is connected to the T-slot platform 10, and a motor mounting base 12 is connected to the adjustable platform 11.

[0040] During operation, the adjustable table 11 is used to adjust the center alignment between the motor shaft 201 and the pressure head 4. After adjustment, the adjustable table 11 can be tightened with bolts.

[0041] In this embodiment, the motor mounting base 12 includes a bottom disc 121 and a mounting post 122 that is fixedly connected to or integrally formed with the bottom disc 121. Three mounting holes are formed along the circumference of the bottom disc 121. Bolts pass through these mounting holes to connect the bottom disc 121 to the adjustable platform 11. A groove 123 is formed by a downward indentation in the center of the upper surface of the mounting post 122. The groove 123 includes two interconnected slots. The inner diameter of the lower slot is clearance-fitted with the inner diameter of the motor shaft 201, preventing the motor shaft 201 from wobbling within the groove 123 and facilitating quick insertion and removal by the operator, thus ensuring the stability of the motor 2 after installation. Simultaneously, the inner diameter of the upper slot is larger than that of the lower slot, facilitating the insertion of the motor shaft 201. Furthermore, the depth of the slot 123 is less than the length of the motor shaft 201 after it extends out of the end face of the motor 2, thereby ensuring that there is a certain gap between the end face of the motor 2 and the end face of the motor mounting base 12 after the motor shaft 201 is inserted into the slot 123. This ensures that the motor shaft 201 can be inserted into the slot 123 for stable positioning, while ensuring that the motor shaft 201 is subjected to force during press fitting while the motor body is not subjected to force, thus preventing the motor body from being pressed off and damaging the motor.

[0042] To prevent the motor 2 from rotating, a motor anti-rotation stop 13 is provided in this embodiment. The upper and lower ends of the motor anti-rotation stop 13 are bent in opposite directions to form a connecting part 131 and a stop part 132. The connecting part 131 has a connecting hole and is connected to the adjustable platform 11 by connecting bolts, and the stop part 132 contacts the side surface 203 of the motor body.

[0043] In this embodiment, the connecting part 131 is detachably connected to the adjustable platform 11 by bolts, which facilitates the adjustment of the position of the motor anti-rotation stop 13 according to the size of the motor 2, so that the motor anti-rotation stop 13 can always contact the side surface 203 of the motor body, thereby preventing the motor 2 from rotating and ensuring the stability during the pressing process.

[0044] As a further description of the above embodiment, the height of the proximity switch 9 is adjustable, facilitating the adjustment and determination of the position of the proximity switch 9 during debugging. This ensures that the indicator light on the proximity switch 9 illuminates just as the three-jaw sliding sleeve 5 comes into contact with the positioning reference surface 202, triggering the proximity switch 9 and thus initiating the grating displacement sensor 8 to calculate the displacement. The height adjustment mechanism of the proximity switch 9 is as follows:

[0045] The horizontal end sidewall of the pressure head 4 is connected to the mounting plate 14. The upper end of the mounting plate 14 has symmetrically formed waist holes 141 along the vertical center of the mounting plate 14. After the screw passes through the waist holes 141, the mounting plate 14 is fixed to the horizontal end sidewall of the pressure head 4. The lower end of the mounting plate 14 is bent horizontally and then vertically to form a mounting part 142. A mounting hole is formed in the middle of the mounting part 142. The proximity switch 9 passes through the mounting hole of the mounting part 142 and is fastened to the mounting part 142 by a nut. At the same time, the output end of the proximity switch 9 is directly opposite the upper end face of the three-jaw sliding sleeve 5.

[0046] During the debugging process, loosen the screw on the waist hole 141, adjust the position of the proximity switch 9, and when the three-jaw sliding sleeve 5 just touches the positioning reference surface 202, the light of the proximity switch 9 will turn on. Tighten the screw to fix the proximity switch 9.

[0047] As a further description of the above embodiment, a spring 15 is provided on the vertical section of the pressure head 4, and the upper and lower ends of the spring 15 abut against the bottom surface of the horizontal end of the pressure head 4 and the upper end surface of the three-jaw sliding sleeve 5, respectively.

[0048] In this embodiment, during the pressing process, the upward movement of the three-jaw sliding sleeve 5 compresses the spring 15, ensuring vertical freedom.

[0049] As a further description of the above embodiment, the three-jaw sliding sleeve 5 includes an integrally formed three-jaw base 501 and a sleeve 502 connected to the three-jaw base 501. The inner wall of the sleeve 502 is provided with an installation groove 503 along its height direction, and an anti-rotation positioning block 504 is provided in the installation groove 503.

[0050] In this embodiment, the anti-rotation positioning block 504 can prevent the three-jaw sliding sleeve 5 from rotating, ensuring that the three-jaw sliding sleeve 5 moves upward smoothly.

[0051] The positioning reference surface 202 and the machined surface of the edge of the motor housing 2 are on the same horizontal plane. After the three-jaw sliding sleeve 5 contacts this horizontal plane, it is positioned at three points to prevent the motor 2 from tilting and floating, which would affect the pressing quality. At the same time, the three-jaw sliding sleeve 5 can avoid the protrusions such as the contact plate and positioning pin at the upper end of the motor body and smoothly contact the positioning reference surface 202.

[0052] As a further description of the above embodiment, the two ends of the T-slot platform 10 are symmetrically connected to bases by connecting bolts. Each base is fixed with a guide post 16. A baffle 17 that can move up and down along the length of the guide post 16 is fitted on the two guide posts 16. The baffle 17 is connected to the guide post 16 by a linear bearing 20, so that the baffle 17 can move up and down smoothly along the length of the guide post 16, thereby ensuring the smoothness of the servo electric cylinder 7's up and down operation. A U-shaped clamping plate is connected to the top of the guide post 16, and the U-shaped clamping plate is clamped to the side plate of the frame 1.

[0053] In this embodiment, a connecting seat 21 is fixedly connected to the center of the upper surface of the baffle 17, and the output shaft of the servo electric cylinder 7 is fixedly connected to the baffle 17 through the connecting seat 21.

[0054] A pressure sensor 18 is fixedly connected to the center of the lower surface of the baffle 17. A die head 19 is connected to the pressure sensor 18. The connector at the upper end of the pressure head 4 is inserted into the die shank hole of the die head 19 and then tightened by radial screws, which facilitates the replacement of the pressure head 4.

[0055] In this embodiment, a pressure sensor 18 is provided between the die head 19 and the baffle 17. The pressure sensor 18 can detect the pressing force value in real time, avoiding damage to the servo electric cylinder 7 due to excessive pressing force in emergency situations. At the same time, when the pressing force reaches a certain pressure protection limit, the servo electric cylinder 7 will automatically stop operating, thereby improving the safety of the device during use.

[0056] Example 2

[0057] This invention provides a pressing method for pressing motor position magnets, comprising the following steps:

[0058] S1. Install the motor 2 and the position magnet 22 respectively, and align the position magnet 22 with the center of the pressure head 4;

[0059] Specifically:

[0060] The motor shaft 201 is inserted into the slot 123 of the motor mounting base 12 for positioning, and the motor anti-rotation stop 13 is installed so that the motor anti-rotation stop 13 contacts the side surface 203 of the motor body to position the motor 2 and prevent the motor 2 from rotating.

[0061] Then, the auxiliary sleeve 3 is placed on the motor 2, and the position magnet 22 is placed in the auxiliary sleeve 3 for auxiliary positioning;

[0062] Finally, adjust the center of the motor shaft 201 and the pressure head 4 by adjusting the adjustable table 11, and then tighten the adjustable table 11.

[0063] S2. Adjust the position of proximity switch 9 so that proximity switch 9 can be triggered just when the three-jaw sliding sleeve 5 contacts the positioning reference surface 202;

[0064] Specifically:

[0065] When installing proximity switch 9, adjust its position by slowly pressing down the pressure head 4 in a jogging motion. Stop pressing down when the lower end face of the three-jaw sliding sleeve 5 contacts the positioning reference surface 202. At this point, the three-jaw sliding sleeve 5 is tightly pressed against the positioning reference surface 202. Adjust the position of proximity switch 9 on the mounting plate 14 until the proximity switch 9 indicator light illuminates. When the proximity switch 9 indicator light is on, tighten the mounting screws of proximity switch 9. The adjusted position is now the trigger position of proximity switch 9 when the three-jaw sliding sleeve 5 contacts the positioning reference surface 202. Displacement calculation begins upon triggering.

[0066] S3. Perform press-fitting and debugging to determine the downward displacement S when the distance between the position magnet 22 and the positioning reference surface 202 is h;

[0067] Specifically:

[0068] The proximity switch 9 triggers the calculation of the downward displacement. The downward displacement is a fixed value, which is obtained through multiple actual measurements. Each time a certain displacement is applied, the distance between the position magnet 22 and the positioning reference surface 202 is measured. The downward displacement is gradually increased until the distance between the position magnet 22 and the positioning reference surface 202 is measured to be h. At this point, the downward displacement is determined as the final downward displacement S.

[0069] After the first press-fitting and debugging is completed, the position magnets 22 of each motor 2 can be press-fitted according to the adjusted displacement. This will ensure that the distance between the position magnets 22 of each motor 2 and the positioning reference surface 202 is h.

[0070] S4. Pressing: After installing the magnet 22 to be pressed, start the servo electric cylinder 7 for pressing. During the pressing process, the grating displacement sensor 8 detects the displacement in real time. When the output shaft of the servo electric cylinder 7 starts to press down by the displacement S from zero, the servo electric cylinder 7 stops, the pressing is completed, and the pressing head 4 returns to its original position.

[0071] In summary, this invention, through servo press-fitting and precise control using a grating displacement sensor, ensures consistent and accurate press-fitting, thereby improving product quality. Simultaneously, it reduces manual measurement steps, effectively increasing production cycle time and efficiency, and alleviating the workload of workers. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial applicability.

[0072] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A press head structure for pressing motor position magnets, comprising a frame (1), characterized in that: A motor (2) is installed at the bottom of the frame (1). A position magnet (22) is placed on the motor (2) through an auxiliary sleeve (3). A pressure head (4) is provided at the middle of the upper end of the frame (1). The pressure head (4) is a T-shaped structure made of non-magnetic material. An adjustable height proximity switch (9) is connected to the horizontal side wall of the pressure head (4). A three-jaw sliding sleeve (5) that can move up and down along the length of the pressure head (4) is provided on the vertical section of the pressure head (4). A spring (15) is provided on the vertical section of the pressure head (4). The spring (15) is located at the water level of the pressure head (4). Between the flat end and the three-jaw sliding sleeve (5), the lower end of the vertical section of the pressure head (4) is connected to a stop block (6). The pressure head (4) is driven to move up and down by a servo electric cylinder (7). A grating displacement sensor (8) is connected to the servo electric cylinder (7). A height-adjustable mounting plate (14) is connected to the side wall of the horizontal end of the pressure head (4). The lower end of the mounting plate (14) is bent horizontally and then vertically to form a mounting part (142). The proximity switch (9) is installed on the mounting part (142) and the output end of the proximity switch (9) is facing the upper surface of the three-jaw sliding sleeve (5).

2. The press head structure for pressing motor position magnets according to claim 1, characterized in that: The bottom of the frame (1) is provided with a T-slot platform (10), an adjustable platform (11) is connected to the T-slot platform (10), and a motor mounting base (12) is connected to the adjustable platform (11).

3. The pressure head structure for pressing motor position magnets according to claim 2, characterized in that: The upper surface of the motor mounting base (12) is recessed downward to form a slot (123). The motor (2) is placed on the motor mounting base (12) and the motor shaft (201) extends into the slot (123).

4. The press head structure for pressing motor position magnets according to claim 2, characterized in that: The adjustable platform (11) is detachably connected to a motor anti-rotation stop (13), and the other end of the motor anti-rotation stop (13) is in contact with the side surface (203) of the motor body.

5. The press head structure for pressing motor position magnets according to claim 1, characterized in that: The three-jaw sliding sleeve (5) includes an integrally formed three-jaw base (501) and a sleeve (502). The inner wall of the sleeve (502) is provided with an installation groove (503) along its height direction. The installation groove (503) is provided with an anti-rotation positioning block (504).

6. The press head structure for pressing motor position magnets according to claim 1, characterized in that: Two guide columns (16) are connected to the frame (1). A baffle (17) that can move up and down along the length of the guide column (16) is fitted on the two guide columns (16). The center of the upper surface of the baffle (17) is fixedly connected to the output shaft of the servo electric cylinder (7) through the connecting seat (21). A pressure sensor (18) is fixedly connected to the center of the lower surface of the baffle (17). A die head (19) is connected to the pressure sensor (18). The upper end of the pressure head (4) is inserted into the die shank hole of the die head (19) and then tightened by radial bolts.

7. A pressing method for pressing motor position magnets, comprising using the pressing head structure for pressing motor position magnets as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Install the motor (2) and the position magnet (22) respectively, and align the position magnet (22) with the center of the pressure head (4); S2. Adjust the position of the proximity switch (9) so that the proximity switch (9) can be triggered just when the three-jaw sliding sleeve (5) contacts the positioning reference surface (202); S3. Perform press-fit debugging to determine the pressing displacement S when the distance between the position magnet (22) and the positioning reference surface (202) is h. The specific method is as follows: the proximity switch (9) triggers the signal to start calculating the pressing displacement. The actual measurement is obtained through multiple press-fits. Each time, a certain displacement is pressed down, and the distance between the position magnet (22) and the positioning reference surface (202) is tested. The pressing displacement is gradually increased until the distance between the position magnet (22) and the positioning reference surface (202) is measured to be h. At this time, the pressing displacement is determined as the final pressing displacement S. S4. Pressing: After installing the magnet (22) to be pressed, start the servo electric cylinder (7) to press. During the pressing process, the grating displacement sensor (8) detects the displacement in real time. When the output shaft of the servo electric cylinder (7) presses down by the displacement S from the zero point, the servo electric cylinder (7) stops, the pressing is completed, and the press head (4) returns to its original position.

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