Magnetic type clamp

Abstract

The invention discloses a magnetic type clamp, and relates to the field of sensors, the magnetic type clamp comprises a clamp shell, a pressing plate groove and a plurality of positioning grooves are formed in the side wall of the clamp shell, a fixed pressing plate is detachably connected in the pressing plate groove, a mounting groove is formed in the side, away from the clamp shell, of the fixed pressing plate, and a sensor is mounted in the mounting groove; a threading hole communicated with the mounting groove is formed in one side of the fixed pressing plate; and a fixed magnetic block is mounted in the positioning groove and is used for attracting a machine tool structure. According to the clamp provided by the invention, different sensors can be mounted more conveniently, and the clamp can be mounted on a machine tool more conveniently.

Description

Technical Field

[0001] The present application relates to the field of sensors, and in particular to a magnetic clamp. Background Art

[0002] Currently, CNC machining is a key processing method in modern manufacturing. Using various sensors to collect signals such as force, vibration, and acoustic emissions during machining, these sensors can be used to monitor the health of the machining process, including tool life and machining quality. The health of the machining process directly impacts production efficiency and product quality. With the growing demand for machining high-value parts (such as aviation components), the requirement for real-time health monitoring of machine tools is becoming increasingly stringent.

[0003] Existing machine tool health monitoring systems require specialized toolholders or non-standard machine tool components to provide sensor mounting locations, making them incapable of monitoring health conditions on general machine tools. Furthermore, these specialized toolholders or non-standard machine tool components provide a single sensor mounting location, failing to accommodate the diverse mounting locations required for different sensor types. Furthermore, existing monitoring systems can only monitor a single type of machining condition, such as tool wear or machining quality. Therefore, the present invention designs a magnetic fixture that can collect signals from multiple sensor types on different machine tools. Summary of the Invention

[0004] In order to provide a fixture that can more conveniently install different sensors and enable the fixture to be more conveniently installed on a machine tool, the present application provides a magnetic fixture.

[0005] The magnetic clamp provided in this application adopts the following technical solution:

[0006] It includes a fixture shell, and the side wall of the fixture shell is provided with a pressure plate groove and several positioning grooves. A fixed pressure plate is detachably connected to the pressure plate groove. A mounting groove is provided on the side of the fixed pressure plate away from the fixture shell, and a sensor is installed in the mounting groove. A wire threading hole connected to the mounting groove is provided on one side of the fixed pressure plate; a fixed magnetic block is installed in the positioning groove, and the fixed magnetic block is used to attract the machine tool structure.

[0007] By adopting the above technical solution, the position of the machine tool is detected as needed, different types of fixed pressure plates are fixed in the pressure plate grooves, and then the sensor is installed in the installation groove. The cable is passed through the threading hole. Under the mutual attraction between the fixed magnetic block and the machine tool structure, the fixture housing is more stably fixed to the machine tool structure, thereby improving the convenience of sensor fixation.

[0008] Preferably, a plurality of magnet fixing bolts are inserted into the clamp housing, and the magnet fixing bolts pass through the clamp housing and are threadedly connected to the fixed magnetic block. A pressure plate fixing bolt is threadedly connected to the clamp housing, and the pressure plate fixing bolts pass through the clamp housing and are threadedly connected to the fixed pressure plate.

[0009] By adopting the above technical solution, the fixed magnetic block and the fixed pressure plate are installed using the pressure plate fixing bolts and the magnet fixing bolts. On the one hand, the fixed magnetic blocks can be fixed more firmly to each other, thereby improving the firmness of the clamp. On the other hand, the convenience of assembling the clamp can be improved, so that the sensor can be replaced more conveniently.

[0010] Preferably, a plurality of telescopic grooves are provided on the inner wall of the installation groove, a clamping piece is slidably connected in the telescopic groove, and a clamping spring is provided in the telescopic groove for driving the clamping piece to press the sensor; a guide wheel is provided on the side of the clamping piece close to the sensor, a first adhesive portion is provided at the bottom of the installation groove, and a second adhesive portion bonded to the first adhesive portion is provided on the upper side of the sensor.

[0011] By adopting the above technical solution, the sensor can be limited by using a tightening plate to improve the stability of the sensor's sliding. The guide wheel can then make the sensor slide more smoothly, improving the smoothness of the sensor's sliding. Finally, the first adhesive part and the second adhesive part can be used to fix the sensor more stably, improving the convenience of fixing sensors of different shapes.

[0012] Preferably, the side wall of the fixed magnetic block is provided with a plurality of limit blocks, and the side wall of the positioning groove is provided with a plurality of limit grooves that slide with the plurality of limit blocks, and the limit grooves are used to limit the sliding distance of the fixed magnetic block in the positioning groove, and the side wall of the positioning groove is provided with a connecting hole, and the connecting hole is opened through the fixed pressure plate, and a connecting plate is slidingly connected in the connecting hole, and the connecting plate is slidingly arranged along the depth direction of the positioning groove, and the two ends of the connecting plate are respectively connected to the fixed magnetic block and the sensor, and a reset compression spring is provided in the connecting hole, and the reset compression spring is used to push the fixed magnetic block back into the positioning groove.

[0013] By adopting the above technical solution, when in use, the fixed magnetic block can be pulled by the machine tool to move closer to the machine tool, thereby driving the sensor to move closer to the machine tool, so that the machine tool can better abut against the machine tool, thereby improving the effect of the sensor detecting the machine tool; when not in use, the fixed magnetic block and the sensor are retracted, thereby reducing the collision of external objects with the sensor, ensuring the service life of the sensor, and improving the stability of the sensor.

[0014] Preferably, the side wall of the clamp housing is provided with a mounting slot connected to the positioning slot, and the mounting slot is arranged opposite to the connecting hole; the sensor and the bottom of the fixed magnetic block are both provided with mounting plugs, and the mounting plugs are provided with mounting sockets that are plugged into the connecting plate, and the inner wall of the mounting socket is provided with a snap-fitting lock slot, and the connecting plate is provided with a snap-fitting lock block that is snap-fitted with the snap-fitting lock slot, and the connecting plate is inserted into the mounting slot through the mounting slot.

[0015] By adopting the above technical solution and opening the installation slot, the clamp can be assembled more conveniently, which improves the convenience of using the connecting plate. In addition, by using symmetrically arranged positioning slots, the two fixed magnetic blocks can push out the sensor more stably, thereby improving the convenience of controlling the movement of the sensor.

[0016] Preferably, a connecting rotating plate is provided at the bottom of the fixed magnetic block, the mounting plug is fixed on the connecting rotating plate, the fixed magnetic block is composed of a plurality of magnetic plates, and the plurality of magnetic plates are arranged at intervals in the direction away from the fixed pressure plate, and the magnetic plates are rotatably connected to the connecting rotating plate; a connecting seat is rotatably connected to the connecting rotating plate, and an adjusting bolt is threadedly connected to the clamp housing, one end of the adjusting bolt is rotatably connected to the connecting seat, and rotating the adjusting bolt is used to pull the fixed magnetic block to slide in the positioning groove.

[0017] By adopting the above technical solution, since the surface of the machine tool to be detected needs to have flat surfaces and curved surfaces, the use of multiple magnetic plates can make the magnetic plates more firmly fixed on the machine tool, and the adjusting bolts can be used to tighten the fixture housing, so that the sensor can be pressed more stably, thereby improving the accuracy of sensor detection; when disassembly is required, rotating the adjusting bolts can pull multiple magnetic plates to gradually separate the machine tool, thereby improving the convenience of disassembling the fixture.

[0018] Preferably, sliding sheets are provided on both sides of the magnetic plate.

[0019] By adopting the above technical solution, sliding sheets are set on both sides of the magnetic plate. On the one hand, the grinding of the magnetic plate can be reduced and the life of the clamp can be increased. On the other hand, the magnetic plate can slide more smoothly during its sliding process, thereby improving the convenience of using the magnetic plate.

[0020] Preferably, auxiliary pressure plates are rotatably connected to both sides of the fixed pressure plate, auxiliary sensing instruments for detection are provided on the bottom side of the auxiliary pressure plate, and a connecting spring is connected between the auxiliary pressure plate and the fixed pressure plate.

[0021] By adopting the above technical solution, for example, when performing strain testing, multiple sensors are usually set up to improve the measurement accuracy. By arranging auxiliary sensing instruments on both sides of the fixed pressure plate, multiple detection devices can be installed at one time. Combined with the connecting spring, the sensor can be better mounted on the machine tool surface, thereby improving the sensor detection effect.

[0022] Preferably, a buffer pressure pad is provided between the auxiliary pressure plate and the fixed pressure plate.

[0023] By adopting the above technical solution, when inspecting machine tools of different shapes, the buffer pressure pad can support the auxiliary pressure plate, thereby reducing the shaking of the auxiliary pressure plate and improving the stability of the auxiliary pressure plate.

[0024] Preferably, an auxiliary magnetic block is provided at the bottom of the auxiliary pressing plate, and the auxiliary magnetic block is used to attract the machine tool structure.

[0025] By adopting the above technical solution, the use of auxiliary magnetic blocks can enable the auxiliary pressure plate to attract the machine tool better and more firmly, thereby improving the effect of the auxiliary sensing instrument pressing the machine tool.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. To detect the position of the machine tool as needed, different types of fixed pressure plates are fixed in the pressure plate slots, and then the sensor is installed in the installation slot. The cable passes through the threading hole. The mutual attraction between the fixed magnetic block and the machine tool structure makes the fixture housing more stably fixed to the machine tool structure, improving the convenience of sensor fixing.

[0028] 2. When in use, the fixed magnet, under the action of the machine tool, can pull the fixed magnet closer to the machine tool, thereby driving the sensor to move closer to the machine tool, so that the machine tool can better abut against the machine tool, improving the sensor's detection effect on the machine tool; when not in use, the fixed magnet and sensor are retracted, thereby reducing the impact of external objects on the sensor, ensuring the service life of the sensor, and improving the stability of the sensor's use;

[0029] 3. By opening the installation slot, the fixture can be assembled more conveniently, which improves the convenience of using the connecting plate. The symmetrical positioning slots can make the two fixed magnetic blocks more stable to push out the sensor, improving the convenience of controlling the movement of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the explosion of a magnetic clamp in Example 1 of the present application Figure 1 ;

[0031] Figure 2Schematic diagram of the explosion of a magnetic clamp in Example 1 of the present application Figure 2 ;

[0032] Figure 3 Schematic diagram of the explosion of a magnetic clamp in Example 1 of the present application Figure 3 ;

[0033] Figure 4 This is a cross-sectional view of the sensor structure mainly embodied in Example 1 of the present application;

[0034] Figure 5 This is a cross-sectional view of the magnetic plate structure mainly embodied in Example 2 of the present application;

[0035] Figure 6 for Figure 5 A magnified schematic diagram of part A;

[0036] Figure 7 This is a cross-sectional view of the auxiliary pressure plate structure mainly embodied in Example 2 of the present application.

[0037] Figure numerals: 1, pressure plate fixing bolt; 2, magnet fixing bolt; 3, fixture housing; 31, rectangular plate; 32, block; 4, fixed magnetic block; 5, fixed pressure plate; 6, mounting slot; 7, sensor; 8, pressure plate slot; 9, positioning slot; 10, threading hole; 11, tightening piece; 12, telescopic slot; 13, tightening spring; 14, guide wheel; 15, first adhesive portion; 16, second adhesive portion; 17, connecting seat; 18, Mounting slot; 19. Connecting rotating plate; 20. Magnetic plate; 21. Limit block; 22. Limit slot; 23. Sliding piece; 24. Mounting plug; 25. Adjusting bolt; 26. Reset spring; 27. Connecting hole; 28. Connecting plate; 29. ​​Snap-fit ​​locking block; 30. Snap-fit ​​locking slot; 33. Mounting socket; 34. Auxiliary pressure plate; 35. Buffering pressure pad; 36. Connecting spring; 37. Auxiliary sensing instrument; 38. Auxiliary magnetic block. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1 - Figure 7 This application is described in further detail.

[0039] An embodiment of the present application discloses a magnetic clamp.

[0040] Example 1

[0041] Reference Figure 1A magnetic clamp includes a clamp housing 3. The clamp housing 3 is a U-shaped structure composed of a rectangular plate 31 and two blocks 32. The clamp housing 3 is made of plastic material. A positioning groove 9 is provided on the side of the block 32 away from the rectangular plate 31. There are two positioning grooves 9. A fixed magnetic block 4 is installed in the positioning groove 9. The fixed magnetic block 4 is a strong magnet. The fixed magnetic block 4 is used to attract the machine tool structure, so that the clamp housing 3 can be fixed more stably. A pressure plate groove 8 is formed between the two blocks 32. The pressure plate groove 8 is a rectangular groove. A fixed pressure plate 5 is detachably connected to the pressure plate groove 8. The fixed pressure plate 5 is provided with an installation groove 6 on the side away from the clamp housing 3. A sensor 7 is installed in the installation groove 6. According to the data to be measured, refer to Figure 1 - Figure 3 Sensor 7 can be configured as a strain sensor 7, a vibration sensor 7, an acoustic emission sensor 7, or the like. The strain sensor 7 is fixed to the machine tool's turning tool to detect tool changes; the vibration sensor 7 is fixed to the spindle housing to collect vibration signals to monitor the machine tool's operating status; and the acoustic emission sensor 7 is fixed to the turret to collect acoustic emission signals generated during machining. This allows for the detection of different data and improves the convenience of machine tool testing. A threading hole 10 is provided on one side of the fixed pressure plate 5, communicating with the mounting slot 6. This facilitates the connection of the sensor 7 and improves the ease of fixed connection of the sensor 7.

[0042] Several magnet fixing bolts 2 are inserted into the fixture housing 3. The magnet fixing bolts 2 pass through the fixture housing 3 and are threadedly connected to the fixed magnet block 4. The fixture housing 3 is also bolted with a pressure plate fixing bolt 1. The pressure plate fixing bolt 1 passes through the fixture housing 3 and is threadedly connected to the fixed pressure plate 5. This improves the stability of the fixation between the sensor 7 and the fixed magnet block 4.

[0043] The inner wall of the mounting groove 6 is provided with a plurality of expansion slots 12, into which a pressing piece 11 is slidably connected. The pressing piece is a rectangular block, and a pressing spring 13 is fixed in the expansion slot 12 for driving the pressing piece 11 to press the sensor 7. The pressing spring 13 cooperates with the pressing piece 11 to better adapt to sensors 7 of different shapes and sizes, thereby improving the convenience of installing different sensors 7. A guide wheel 14 is fixed to the side of the pressing piece 11 close to the sensor 7. The guide wheel 14 cooperates with the sensor 7 to make the sensor 7 more convenient to insert, thereby improving the convenience of fixing the sensor 7. A first adhesive portion 15 is fixed to the bottom of the mounting groove 6, and a second adhesive portion 16 bonded to the first adhesive portion 15 is fixed to the upper side of the sensor 7. The first adhesive portion 15 and the second adhesive portion 16 are the hook and fleece surfaces of Velcro, thereby improving the firmness of fixing the sensor 7.

[0044] The implementation principle of the magnetic clamp of the embodiment of the present application is as follows: during operation, different sensors 7 can be fixed to different fixed pressure plates 5 according to the data to be measured, so that the fixed pressure plates 5 can be directly replaced, thereby enabling more convenient detection of different data. In addition, by cooperating with the pressing spring 13 and the pressing plate 11, sensors 7 of different sizes can be more conveniently fixed, thereby improving the convenience of fixing the sensor 7. In combination with the two fixed magnetic blocks 4, the clamp housing 3 can be more stably and firmly fixed to the machine tool, thereby improving the convenience of fixing the clamp housing 3.

[0045] Example 2

[0046] Reference Figure 5 The difference between this embodiment and embodiment 1 is that a plurality of limit blocks 21 are fixed to the side wall of the fixed magnet 4, and a plurality of limit slots 22 are provided on the side wall of the positioning slot 9 to slideably cooperate with the limit blocks 21. The limit slots 22 are used to limit the sliding distance of the fixed magnet 4 in the positioning slot 9, thereby making it easier to limit the position of the fixed block. A connecting hole 27 is provided on the side wall of the positioning slot 9. The connecting hole 27 is provided through the fixed pressure plate 5. A connecting plate 28 is slidably connected to the connecting hole 27. The connecting plate 28 is slidably arranged along the depth direction of the positioning slot 9. The two ends of the connecting plate 28 are respectively connected to the fixed magnet 4 and the sensor 7. A reset spring 26 is fixed in the connecting hole 27. The reset spring 26 is used to push the fixed magnet 4 back into the positioning slot 9. When not in use, the fixed magnet 4 and the sensor 7 are retracted, thereby reducing the impact of external objects on the sensor 7, ensuring the service life of the sensor 7, and improving the stability of the sensor 7. The side wall of the fixture housing 3 is provided with a mounting slot 18 that communicates with the positioning slot 9. The mounting slot 18 is a rectangular slot and is arranged opposite the connecting hole 27. The sensor 7 and the fixed magnet block 4 are both fixed with mounting plugs 24 at the bottom. The mounting plugs 24 are provided with mounting sockets 33 that engage with the connecting plate 28. The two fixed magnet blocks 4 and the connecting plate 28 are combined to enable the sensor 7 to be better pressed against the machine tool. The inner wall of the mounting socket 33 is provided with a hemispherical locking slot 30. The connecting plate 28 is integrally formed with a locking block 29 that engages with the locking slot 30. The locking slot 30 and the locking block 29 cooperate to more stably lock the connecting plate 28, thereby improving the stability of the fixing of the connecting plate 28. The connecting plate 28 is inserted into the mounting slot 18 through the mounting slot 18, thereby making it easier to insert the connecting plate 28 and improving the convenience of installation.

[0047] A connecting plate 19 is mounted at the bottom of the fixed magnet 4. The connecting plate 19 is a rectangular plate 31, and a mounting insert 24 is fixed to the connecting plate 19. The fixed magnet 4 is composed of multiple magnetic plates 20, which are spaced apart in a direction away from the fixed pressure plate 5. Sliding pieces 23 are fixed to both sides of the magnetic plates 20, allowing the magnetic plates 20 to slide more smoothly. The magnetic plates 20 are rotatably connected to the connecting plate 19. A connecting seat 17 is rotatably connected to the connecting plate 19. An adjusting bolt 25 is threadedly connected to the clamp housing 3. One end of the adjusting bolt 25 is rotatably connected to the connecting seat 17. Rotating the adjusting bolt 25 is used to pull the fixed magnet 4 to slide within the positioning slot 9, making the fixed magnet 4 more suitable for curved and flat surfaces and improving the secure fixation of the clamp housing 3. The connecting seat 17 is fixed to the mounting insert 24, thereby better limiting the position of the fixed magnet 4. Furthermore, under the action of the limiting block 21 and the limiting groove 22, the position of the magnetic plate 20 can be better limited when the fixed magnetic block 4 is pulled, thereby improving the convenience of pulling and leveling the magnetic plate 20.

[0048] Auxiliary pressure plates 34 are rotatably connected to both sides of the fixed pressure plate 5. Auxiliary sensing instruments 37 for detection are fixed to the bottom of the auxiliary pressure plates 34. Connecting springs 36 are connected between the auxiliary pressure plates 34 and the fixed pressure plate 5 to better tighten the auxiliary pressure plates 34 against the machine tool. A buffer pad 35 made of sponge material is fixed between the auxiliary pressure plates 34 and the fixed pressure plate 5. Auxiliary magnetic blocks 38 are fixed to the bottom of the auxiliary pressure plates 34 to attract the machine tool structure, allowing the auxiliary sensing instruments 37 to better detect the machine tool.

[0049] The implementation principle of Example 2 is: during operation, the auxiliary pressure plate 34 is combined with the auxiliary sensing instrument 37 to better detect the machine tool and improve the detection effect of the machine tool. In combination with multiple magnetic plates 20, it can be better adapted to different arc surfaces and planes, thereby improving the stability of the fixture housing 3.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A magnetic clamp, characterized in that: The invention comprises a fixture housing (3), wherein a pressure plate groove (8) and a plurality of positioning grooves (9) are provided on the side wall of the fixture housing (3); a fixed pressure plate (5) is detachably connected in the pressure plate groove (8); a mounting groove (6) is provided on the side of the fixed pressure plate (5) away from the fixture housing (3); a sensor (7) is installed in the mounting groove (6); a threading hole (10) connected to the mounting groove (6) is provided on one side of the fixed pressure plate (5); a fixed magnetic block (4) is installed in the positioning groove (9); and the fixed magnetic block (4) is used to attract the machine tool structure.

2. The magnetic clamp according to claim 1, characterized in that: A plurality of magnet fixing bolts (2) are inserted into the clamp housing (3), and the magnet fixing bolts (2) pass through the clamp housing (3) and are threadedly connected to the fixed magnetic block (4). A pressure plate fixing bolt (1) is threadedly connected to the clamp housing (3), and the pressure plate fixing bolt (1) passes through the clamp housing (3) and is threadedly connected to the fixed pressure plate (5).

3. The magnetic clamp according to claim 2, characterized in that: The inner wall of the installation groove (6) is provided with a plurality of telescopic grooves (12), a pressing piece (11) is slidably connected in the telescopic groove (12), and a pressing spring (13) is provided in the telescopic groove (12) for driving the pressing piece (11) to press the sensor (7); a guide wheel (14) is provided on the side of the pressing piece (11) close to the sensor (7), a first adhesive portion (15) is provided at the bottom of the installation groove (6), and a second adhesive portion (16) bonded to the first adhesive portion (15) is provided on the upper side of the sensor (7).

4. The magnetic clamp according to claim 1, characterized in that: The side wall of the fixed magnetic block (4) is provided with a plurality of limit blocks (21), and the side wall of the positioning groove (9) is provided with a plurality of limit grooves (22) that slide and cooperate with the plurality of limit blocks (21). The limit grooves (22) are used to limit the sliding distance of the fixed magnetic block (4) in the positioning groove (9). The side wall of the positioning groove (9) is provided with a connecting hole (27). The connecting hole (27) is opened through the fixed pressure plate (5). A connecting plate (28) is slidingly connected in the connecting hole (27). The connecting plate (28) is slidingly arranged along the depth direction of the positioning groove (9). The two ends of the connecting plate (28) are respectively connected to the fixed magnetic block (4) and the sensor (7). A reset compression spring (26) is provided in the connecting hole (27). The reset compression spring (26) is used to push the fixed magnetic block (4) back into the positioning groove (9).

5. The magnetic clamp according to claim 4, characterized in that: The side wall of the clamp housing (3) is provided with a mounting slot (18) connected to the positioning slot (9), and the mounting slot (18) is arranged opposite to the connecting hole (27); the bottom of the sensor (7) and the fixed magnetic block (4) are both provided with a mounting plug (24), and the mounting plug (24) is provided with a mounting socket (33) that is plugged into the connecting plate (28), and the inner wall of the mounting socket (33) is provided with a snap-fit ​​locking slot (30), and the connecting plate (28) is provided with a snap-fit ​​locking block (29) that is snap-fitted into the snap-fit ​​locking slot (30), and the connecting plate (28) is inserted into the mounting slot (18) through the mounting slot (18).

6. The magnetic clamp according to claim 5, characterized in that: A connecting rotating plate (19) is provided at the bottom of the fixed magnetic block (4), and the mounting plug (24) is fixed on the connecting rotating plate (19). The fixed magnetic block (4) is composed of a plurality of magnetic plates (20), and the plurality of magnetic plates (20) are arranged at intervals in a direction away from the fixed pressure plate (5), and the magnetic plates (20) are rotatably connected to the connecting rotating plate (19); a connecting seat (17) is rotatably connected to the connecting rotating plate (19), and an adjusting bolt (25) is threadedly connected to the clamp housing (3), and one end of the adjusting bolt (25) is rotatably connected to the connecting seat (17). Rotating the adjusting bolt (25) is used to pull the fixed magnetic block (4) to slide in the positioning groove (9).

7. The magnetic clamp according to claim 6, characterized in that: Sliding sheets (23) are provided on both sides of the magnetic attraction plate (20).

8. The magnetic clamp according to claim 7, characterized in that: Auxiliary pressing plates (34) are rotatably connected to both sides of the fixed pressing plate (5), and an auxiliary sensing instrument (37) for detection is provided on the bottom side of the auxiliary pressing plate (34). A connecting spring (36) is connected between the auxiliary pressing plate (34) and the fixed pressing plate (5).

9. The magnetic clamp according to claim 8, characterized in that: A buffer pressure pad (35) is provided between the auxiliary pressure plate (34) and the fixed pressure plate (5).

10. The magnetic clamp according to claim 8, characterized in that: An auxiliary magnetic block (38) is provided at the bottom of the auxiliary pressing plate (34), and the auxiliary magnetic block (38) is used to attract the machine tool structure.

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