A six-degree-of-freedom adjustable tip focusing magnetic field generating device

Abstract

The present invention discloses a six-degree-of-freedom adjustable tip focusing magnetic field generating device, comprising: a three-degree-of-freedom moving platform for realizing the movement of the device in three degrees of freedom; a magnetic arm assembly including two magnetic arms symmetrically installed on both sides of the turning tool. The magnetic arms include magnets, magnetic field focusing heads and adjustable magnet chucks, and are divided into two types, A and B, for generating a focusing magnetic field at the tip of the turning tool. When a vertical magnetic field needs to be generated by the magnetic arm assembly, two magnetic arms A are symmetrically arranged at the tip of the turning tool; when a parallel magnetic field needs to be generated by the magnetic arm assembly, magnetic arm A is used above the tool and magnetic arm B is used below the tool. The distance between the magnetic field focusing head at the tip of magnetic arm A and the tip of the turning tool is adjustable within the range of 0.5 to 5 mm, and the magnet and the magnetic field focusing head at the tip of magnetic arm B are vertically arranged below the tool shank. The present invention can apply a focusing static magnetic field with adjustable magnetic induction intensity at the tip of the turning tool in multiple degrees of freedom.

Description

Technical Field

[0001] The present invention belongs to the technical field of machining, and more specifically, relates to a six-degree-of-freedom adjustable tip focusing magnetic field generating device. Background Art

[0002] As a relatively new magnetic field assisted machining technology, in turning machining, a static magnetic field can be formed in the machining area, improving machining accuracy, reducing the surface roughness of the machining, and reducing tool wear, etc.

[0003] Currently, the static magnetic field application method adopted in the research of magnetic field assisted machining is to use two parallel plate-shaped permanent magnets. A static magnetic field is formed as a whole in the machining area by the two large-area parallel plate permanent magnets, and they are fixed to the lathe headstock through brackets. The distance between the two magnets can be adjusted within a certain range to adjust the magnetic field intensity. However, this design has many problems: (1) The generated magnetic field intensity is too small, and only a magnetic field of 0.01T to 0.04T can be generated within the adjustable range; (2) The magnetic field application range is too large, which is not conducive to controlling variables in experiments to study the influence of the magnetic field; (3) The magnetic field can only be arranged in one horizontal direction and cannot change the angle for research. Summary of the Invention

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a six-degree-of-freedom adjustable tip focusing magnetic field generating device, which can realize the multi-degree-of-freedom application of a high-intensity focused static magnetic field at the tip of a turning tool.

[0005] To achieve the above purpose, the present invention provides a six-degree-of-freedom adjustable tip focusing magnetic field generating device, which is applied to turning and includes a three-degree-of-freedom moving platform and a magnetic arm assembly;

[0006] The three-degree-of-freedom moving platform includes an XY series slide and a Z-axis rotating ring installed on the cutting tool rest, and is used to realize the movement and positioning of two translational degrees of freedom and one rotational degree of freedom of the magnetic arm assembly;

[0007] The magnetic arm assembly includes two magnetic arms installed on both sides of the turning tool. Both magnetic arms include a magnet, a magnetic field focusing head, and an adjustable magnet chuck with two rotational degrees of freedom, and are divided into two types, A and B. In the same magnetic arm, the magnet and the magnetic field focusing head are installed at one end of the adjustable magnet chuck, and the other end of the adjustable magnet chuck is installed on the Z-axis rotating ring through a mounting plate; during operation, the tips of the magnetic field focusing heads in the two magnetic arms are in the same plane, and this plane is 0.5 - 2 mm behind the tip of the turning tool, and is used to generate a focused magnetic field at the tip of the turning tool;

[0008] Wherein, when the magnetic field direction generated by the magnetic arm assembly at the tool tip needs to be perpendicular to the tool tip cutting direction in the XY plane, two magnetic arms A are symmetrically installed on both sides of the turning tool, and the magnetic field focusing heads at the tips of the two magnetic arms are respectively 0.5 to 5 mm away from the tool tip at the turning tool; when the magnetic field direction generated by the magnetic arm assembly at the tool tip needs to be parallel to the tool tip cutting direction, magnetic arm A is used above the turning tool and magnetic arm B is used below the turning tool, and the magnetic field focusing head at the tip of magnetic arm A is 0.5 to 5 mm away from the tool tip at the turning tool, and the magnet and the magnetic field focusing head at the tip of magnetic arm B are vertically arranged below the tool shank.

[0009] In one embodiment, one side of the XY series slide is fixed to the base, the base is installed on the tool rest through a tension member, and the other side of the XY series slide is connected to the Z-axis rotating ring.

[0010] In one embodiment, when the tool tip cutting direction is towards the Y-axis direction and it is required that the magnetic arm assembly forms a perpendicular magnetic field at the tool tip of the turning tool, the operation method of the six-degree-of-freedom adjustable tool tip focusing magnetic field generating device is as follows:

[0011] (1) Adjust the XY series slide in the Y-axis direction so that the magnetic field focusing heads in the two magnetic arms A are 5 to 10 mm away from the tool in the Y-axis direction;

[0012] (2) Manually adjust the angles and extension lengths of the adjustable magnet chucks in the two magnetic arms A so that the connection line of the tips of the magnetic field focusing heads in the two magnetic arms A is parallel to the plane to be machined, and this plane is 0.5 to 2 mm behind the tool tip, and the distance between the tips of the two magnetic field focusing heads and the tool tip is 0.5 to 5 mm;

[0013] (3) Adjust the XY series slide along the Y-axis so that the focusing centers of the magnetic field focusing heads in the two magnetic arms A are placed at the tool tip;

[0014] (4) Ensure that the XY series slide and the Z-axis rotating ring are locked tightly without looseness and the magnets in the two magnetic arms and the adjustable magnet chucks are tightly installed without looseness.

[0015] In one embodiment, when the tool tip cutting direction is towards the positive Y-axis direction and it is required that the magnetic arm assembly forms a parallel magnetic field at the tool tip of the turning tool, the operation method of the six-degree-of-freedom adjustable tool tip focusing magnetic field generating device is as follows:

[0016] (1) Loosen the magnet in the magnetic arm B, and then adjust the XY series slide in the X-axis direction so that the magnetic field focusing head in the magnetic arm B is aligned with the tool shank in the X-axis direction and clamped on the tool shank, so that the magnet and the magnetic field focusing head in the magnetic arm B are naturally adsorbed below the tool shank;

[0017] (2) Adjust the magnetic fields in magnetic arms A and B so that the tips of the magnetic field focusing heads are in the same plane, and this plane is 0.5 - 2 mm behind the tool tip. Then fix the magnet and the adjustable magnet chuck in magnetic arm A.

[0018] (3) Adjust the XY series slide in the Y-axis direction so that the distance between the magnetic field focusing head in magnetic arm A and the tool tip is 0.5 - 5 mm. After adjustment, fix the magnet in magnetic arm B on the adjustable magnet chuck in this magnetic arm.

[0019] (4) Ensure that the XY series slide is tightly locked with the Z-axis rotating ring without looseness, and the magnets in the two magnetic arms are tightly installed on the adjustable magnet chucks without looseness.

[0020] In one embodiment, the magnets and the magnetic field focusing heads in the two magnetic arms both adopt neodymium iron boron permanent magnets and cylindrical bevel-cut permalloy magnetic field focusing heads.

[0021] In one embodiment, the Z-axis rotating ring and the adjustable magnet chucks in the two magnetic arms are both made of aluminum alloy parts.

[0022] In one embodiment, the base and the mounting plate are both made of steel parts.

[0023] In one embodiment, one side of the XY series slide is fixed on the base by 4 M3 screws.

[0024] In one embodiment, the Z-axis rotating ring is installed on the XY series slide by 4 M3 screws.

[0025] In one embodiment, in the same magnetic arm, the other end of the adjustable magnet chuck is installed on the mounting plate by M4 screws, and the mounting plate is installed on the Z-axis rotating ring by M4 screws.

[0026] The six-degree-of-freedom adjustable tip focusing magnetic field generating device provided by the present invention has the following effects: (1) It can achieve continuously adjustable magnetic field application at multiple angles, enabling more potential and better magnetic field assistance angles to be tried in magnetic field-assisted machining experiments, giving full play to the advantages of magnetic field assistance to a greater extent. In addition, the reliable angle adjustment mechanism ensures the repeatability of the experiment and improves the credibility of the experiment; (2) By magnetic field focusing, the utilization rate of magnetic flux can be improved. When the distance between the focusing head and the tip is about 1 mm, the magnetic induction intensity at the tip reaches 0.5 T, and the magnetic induction intensity that can be studied is increased by more than 10 times, enabling the magnetic field intensity that can be studied in magnetic field-assisted machining research to break through 0.04 T, so that more potential and better magnetic field assistance intensities can be tried in magnetic field-assisted machining experiments, giving full play to the advantages of magnetic field assistance to a greater extent; (3) Compared with traditional magnetic field-assisted equipment, the method of magnetic field focusing can effectively reduce the magnetic field application range, which is conducive to controlling variables in research and improving the credibility of the experiment; (4) It reduces the volume and weight of the auxiliary device, and is installed on the tool holder, which can reduce the impact on the dynamic performance of the machine tool; (5) The modular design allows the installation of various tip auxiliary devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG. is a schematic structural diagram of the base installed on the tool holder provided by an embodiment of the present invention;

[0028] Figure 2 FIG. is the XY series slide table provided by the present invention installed on Figure 1 the structure schematic diagram on the base in;

[0029] Figure 3 FIG. is the Z-axis rotating ring provided by the present invention installed on Figure 3 the structure schematic diagram on the XY series slide table in;

[0030] Figure 4 FIG. is a magnetic circuit schematic diagram of the focusing magnetic field generated by the six-degree-of-freedom adjustable tip focusing magnetic field generating device provided by the present invention in the tip area of the turning tool; In the figure, V cut represents the cutting direction of the tool tip. According to the positional relationship between the cutting direction and the magnetic field direction, it is divided into a vertical magnetic field (a) and a parallel magnetic field (b);

[0031] Figure 5 FIG. is a schematic structural diagram of the six-degree-of-freedom adjustable tip focusing magnetic field generating device when applying a vertical magnetic field provided by an embodiment of the present invention;

[0032] Figure 6 FIG. is a schematic structural diagram of the six-degree-of-freedom adjustable tip focusing magnetic field generating device when applying a parallel magnetic field provided by an embodiment of the present invention;

[0033] Figure 7 FIG. is the mounting plate in the two magnetic arms A provided by an embodiment of the present invention installed on Figure 3Schematic diagram of the structure on the Z-axis rotating ring;

[0034] Figure 8 It is a schematic diagram of the installation of the magnet, magnetic field focusing head and adjustable magnet chuck in the two magnetic arms A provided by the present invention on Figure 7 the mounting plate in;

[0035] Figure 9 It is a schematic diagram of the installation of the mounting plate in the magnetic arm A (above) and the magnetic arm B (below) provided by an embodiment of the present invention on Figure 3 the Z-axis rotating ring in;

[0036] Figure 10 It is a schematic diagram of the corresponding installation of the magnet, magnetic field focusing head and adjustable magnet chuck in the magnetic arms A and B (below) provided by the present invention on Figure 9 the two mounting plates in.

[0037] Explanation of reference numerals: 1 - tension member; 2 - base; 3 - XY series slide; 4 - Z-axis rotating ring; 5 - mounting plate in magnetic arm A; 6 - adjustable magnet chuck in magnetic arm A; 7 - magnet and magnetic field focusing head in magnetic arm A; 8 - mounting plate in magnetic arm B; 9 - adjustable magnet chuck in magnetic arm B; 10 - magnet and magnetic field focusing head in magnetic arm B. Detailed implementation manners

[0038] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] To solve the problems of small magnetic field strength, large magnetic field application range and inability to adjust the magnetic field direction in traditional static magnetic field assisted machining using two parallel plate-shaped permanent magnets, the present invention provides a six-degree-of-freedom adjustable tip focusing magnetic field generating device, which can be applied to turning to form a local high-intensity focused static magnetic field environment at the turning tool tip and achieve multi-degree-of-freedom adjustment. It should be noted that in the description of the present invention, the traditional absolute coordinate system will be used: the main axis is Z, and the axis perpendicular to the ground is the Y axis.

[0040] The six-degree-of-freedom adjustable tip focusing magnetic field generating device provided by the present invention consists of two parts, one is a motion mechanism, and the other is a focusing magnetic field mechanism. Among them, the motion mechanism adopts a three-degree-of-freedom moving platform to realize the movement and positioning of two translational degrees of freedom and one rotational degree of freedom of the magnetic arm assembly; the focusing magnetic field mechanism adopts the magnetic arm assembly to generate a focusing magnetic field at the turning tool tip.

[0041] In this embodiment, as Figure 5 and Figure 6As shown, the three-degree-of-freedom moving platform adopts the XY series slide 3 installed on the cutting tool holder and the Z-axis rotating ring 4. The XY series slide 3 is used to enable the magnetic arm assembly to achieve fine adjustment and locking of two translational degrees of freedom, and the Z-axis rotating ring 4 is used to enable the magnetic arm assembly to achieve coarse adjustment, fine adjustment, and locking of the angle around the Z-axis.

[0042] Specifically, the connection relationship between the XY series slide 3, the Z-axis rotating ring 4, and the tool holder provided in this embodiment can be: One side of the XY series slide 3 can be fixed to the base 2 by 4 M3 screws, as Figure 2 shown, and the other side is connected to the Z-axis rotating ring 4, as Figure 3 shown, and the base 2 is then installed on the tool holder through the tensioning member 1, as Figure 1 shown. For the installation of this device on different tool holders, the installation fixing parts and the base can be appropriately changed to adapt to different installation conditions.

[0043] The magnetic arm assembly adopts two magnetic arms installed on both sides of the turning tool. Both magnetic arms include magnets, magnetic field focusing heads, and adjustable magnet chucks with two rotational degrees of freedom, and are divided into two types, A and B. In the same magnetic arm, the magnet and the magnetic field focusing head are installed at one end of the adjustable magnet chuck, and the other end of the adjustable magnet chuck is installed on the Z-axis rotating ring through a mounting plate. In this embodiment, since the adjustable magnet chuck has two rotational degrees of freedom and the magnet can be adjusted linearly therein, that is, one translational degree of freedom can be achieved, the magnetic arm can achieve adjustment of 3 degrees of freedom. Coupled with the fact that the three-degree-of-freedom moving platform provided above can achieve the movement of two translational degrees of freedom and one rotational degree of freedom, therefore, the device provided in this embodiment can achieve six-degree-of-freedom adjustment of the cutting tool tip magnetic field.

[0044] In this embodiment, since different interference conditions will occur between the cutting tool and the device provided in this embodiment when the magnetic arm assembly is moved and adjusted on the Z-axis rotating ring to generate a magnetic field at the cutting tool tip, the corresponding device combination forms will be different under different magnetic field conditions. Among them, the magnetic field states mainly include two states: vertical magnetic field and parallel magnetic field. Taking the cutting direction upward (positive Y-axis) as an example, the structural forms of the device provided in this embodiment when applying a vertical magnetic field and a parallel magnetic field are described below.

[0045] The vertical magnetic field means that the magnetic field direction formed by the magnetic arm assembly at the cutting tool tip of the turning tool is perpendicular to the cutting tool tip cutting direction in the XY plane. The magnetic circuit of this magnetic field is as Figure 4 shown in (a) therein. At this time, a pair of magnetic arms A need to be symmetrically installed on both sides of the turning tool, and the magnet polar directions in the two magnetic arms A on both sides are the same, so as to form a vertical focusing magnetic field, as Figure 5 shown. The parallel magnetic field means that the magnetic field direction formed by the magnetic arm assembly at the cutting tool tip of the turning tool is parallel to the cutting tool tip cutting direction. The magnetic circuit of this magnetic field is as Figure 4As shown in (b) of the figure, in this case, since the cutting blade and the tool shank in the opposite direction of cutting will interfere with the magnetic arm A, the magnetic arm A cannot be used on one side of the tool shank. Instead, the magnetic arm B must be used on this side. Similarly, the polar directions of the magnets on both sides are made the same to form a parallel focusing magnetic field, as Figure 6 shown.

[0046] Moreover, whether a parallel magnetic field or a vertical magnetic field is applied, the tips of the magnetic field focusing heads in the two magnetic arms are in the same plane, which is 0.5 - 2 mm behind the tip of the turning tool. This can avoid interference between the focusing head and the workpiece while ensuring a certain strength of the tip magnetic field intensity.

[0047] To enable the magnetic arm assembly provided in this embodiment to generate a higher-intensity magnetic field at the tool tip, when a vertical magnetic field is applied, as Figure 5 shown, the magnetic field focusing heads at the tips of the two magnetic arms A are respectively about 1 mm (0.5 - 5 mm) away from the tool tip, which can make the tool tip magnetic field reach about 0.5 T; when a parallel magnetic field is applied, as Figure 6 shown, the magnetic field focusing head in the magnetic arm B should be vertically arranged under the tool shank without any gap in the middle. The magnetic field focusing head 7 at the tip of the magnetic arm A is about 1 mm (0.5 - 5 mm) away from the tool tip, which can make the tool tip magnetic field reach about 0.5 T.

[0048] Preferably, the magnetic field focusing head in the magnetic arm provided in this embodiment can adopt a cylindrical bevel-cut permalloy magnetic field focusing head, which can be used to apply a high magnetic induction intensity focusing static magnetic field at the tool tip of the turning tool, and this magnetic field is mainly concentrated at the tool tip with little influence on the surrounding environment. The base and the mounting plate can be made of steel parts to enhance the structural stiffness. The Z-axis rotating ring and the adjustable magnet chucks in the two magnetic arms can be made of aluminum alloy parts to reduce the overall structural mass and avoid affecting the magnetic circuit. The magnets and the magnetic field focusing heads in the two magnetic arms can use neodymium iron boron permanent magnets to generate a magnetic field and use 1J50 soft magnetic material permalloy as the focusing magnetic head material.

[0049] The six-degree-of-freedom adjustable tip focusing magnetic field generating device provided by this embodiment has the following effects: (1) It can achieve continuously adjustable magnetic field application at multiple angles, enabling more potential and better magnetic field assistance angles to be tried in magnetic field-assisted machining experiments, giving full play to the advantages of magnetic field assistance to a greater extent. In addition, the reliable angle adjustment mechanism ensures the repeatability of the experiment and improves the credibility of the experiment; (2) By magnetic field focusing, the utilization rate of magnetic flux can be improved. When the distance between the focusing head and the tip is about 1 mm, the magnetic induction intensity at the tip reaches 0.5 T, and the magnetic induction intensity that can be studied is increased by more than 10 times, enabling the magnetic field intensity that can be studied in magnetic field-assisted machining research to break through 0.04 T, allowing more potential and better magnetic field assistance intensities to be tried in magnetic field-assisted machining experiments, giving full play to the advantages of magnetic field assistance to a greater extent; (3) Compared with traditional magnetic field assistance equipment, the method of magnetic field focusing can effectively reduce the magnetic field application range, which is conducive to controlling variables in research and improving the credibility of the experiment; (4) It reduces the volume and weight of the auxiliary device, and is installed on the tool holder, which can reduce the impact on the dynamic performance of the machine tool; (5) Modular design enables the installation of various tip auxiliary equipment.

[0050] The present invention also provides an operation method for the above six-degree-of-freedom adjustable tip focusing magnetic field generating device, which is as follows:

[0051] Taking the cutting direction upward (positive Y-axis) as an example. When a vertical magnetic field is to be formed at the tip, the device must be assembled as shown in Figures 1 to 3 、 Figure 7 and Figure 8 After assembly, position adjustment is started. The purpose is to make the center of the focused magnetic field as close as possible to the tip area without interference. First, adjust the XY series slide upward so that the magnetic field focusing heads in the two magnetic arms A move away from the tool in the Y-axis direction; then manually adjust the angles and extension lengths of the adjustable magnet chucks in the two magnetic arms A so that the line connecting the tips of the two magnetic field focusing heads is basically parallel to the plane to be machined, and this plane is 0.5 - 2 mm behind the tip, and the distance between the tips of the two magnetic field focusing heads is 0.5 - 5 mm from the tip; then, adjust the XY series slide so that the focusing centers of the magnetic field focusing heads in the two magnetic arms A are placed at the tip; finally, ensure that the XY series slide and the Z-axis rotating ring are locked tightly without looseness and the magnets in the two magnetic arms and the adjustable magnet chucks are tightened tightly without looseness.

[0052] Taking the cutting direction upward (positive Y-axis) as an example. When a parallel magnetic field is to be formed at the tip, the device must be assembled as shown in Figures 1 to 3 、 Figure 9 and Figure 10For the assembly shown, after the assembly is completed, position adjustment is started. The purpose is to make the center of the focusing magnetic field as close as possible to the tip area without interference. First, loosen the magnet in the magnetic arm B, and then adjust the XY series slide in the X-axis direction so that the magnetic field focusing head in the magnetic arm B is aligned with the tool shank in the X direction and clamped on the tool shank, so that the magnet and the magnetic field focusing head in the magnetic arm B are naturally adsorbed under the tool shank; then adjust the tips of the magnetic field focusing heads in the magnetic arms A and B to be in the same plane, and this plane is about 1 mm (0.5 - 2 mm) behind the tip to avoid interference with the workpiece, etc. Then fix the magnet and the adjustable magnet chuck in the magnetic arm A; after that, adjust the XY series slide in the Y-axis direction so that the distance between the magnetic field focusing head in the magnetic arm A and the tip is about 1 mm (0.5 - 5 mm). After adjustment, fix the magnet in the magnetic arm B on its adjustable magnet chuck; finally, ensure that the XY series slide and the Z-axis rotating ring are locked tightly without looseness and the magnets in the two magnetic arms and the adjustable magnet chucks are tightened tightly without looseness.

[0053] It is easy for those skilled in the art to understand that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A six-degree-of-freedom adjustable tip focusing magnetic field generating device, which is applied to cutting machining, is characterized in that It includes a three-degree-of-freedom moving platform and a magnetic arm assembly; The three-degree-of-freedom moving platform includes an XY series slide table and a Z-axis rotating ring installed on the cutting tool rest, and is used to realize the movement and positioning of two translational degrees of freedom and one rotational degree of freedom of the magnetic arm assembly; The magnetic arm assembly includes two magnetic arms installed on both sides of the turning tool. Both magnetic arms include a magnet, a magnetic field focusing head, and an adjustable magnet chuck with five rotational degrees of freedom, and are divided into two types, A and B. In the same magnetic arm, the magnet and the magnetic field focusing head are installed at one end of the adjustable magnet chuck, and the other end of the adjustable magnet chuck is installed on the Z-axis rotating ring through a mounting plate; during operation, the tips of the magnetic field focusing heads in the two magnetic arms are in the same plane, which is used to generate a focused magnetic field at the tip of the turning tool. This plane is adjusted to a distance of 0.5 - 2 mm from the machining plane according to the non-interference principle, and is located at a certain distance behind the tip of the turning tool according to the shape of the actual workpiece to be machined to avoid interference; Among them, when the magnetic field direction generated by the magnetic arm assembly at the tip of the turning tool needs to be perpendicular to the cutting direction of the tip in the XY plane, two magnetic arms A are symmetrically installed on both sides of the turning tool, and it is ensured that there is a certain safe distance between the magnetic field focusing heads at the ends of the two magnetic arms and the workpiece; when the magnetic field direction generated by the magnetic arm assembly at the tip of the turning tool needs to be parallel to the cutting direction of the tip, magnetic arm A is used above the turning tool, and magnetic arm B is used below the turning tool, and the distance between the magnetic field focusing head at the tip of magnetic arm A and the tip of the turning tool is 0.5 - 5 mm, and the magnet and the magnetic field focusing head at the tip of magnetic arm B are vertically arranged below the tool shank.

2. The six-degree-of-freedom adjustable tip focusing magnetic field generating device according to claim 1, characterized in that One side of the XY series slide table is fixed on the base, the base is installed on the tool rest through a tensioning member, and the other side of the XY series slide table is connected to the Z-axis rotating ring.

3. The six-degree-of-freedom adjustable tip focusing magnetic field generating device according to claim 2, wherein When the cutting direction of the tip is towards the Y-axis direction and it is required that the magnetic arm assembly forms a perpendicular magnetic field at the tip of the turning tool, the operation method of the six-degree-of-freedom adjustable tip focused magnetic field generating device is as follows: (1) Adjust the XY series slide table in the Y-axis direction so that the magnetic field focusing heads in the two magnetic arms A move 5 - 10 mm away from the tool in the Y-axis direction; (2) Manually adjust the angles and extension lengths of the adjustable magnet chucks in the two magnetic arms A so that the connection line of the tips of the magnetic field focusing heads in the two magnetic arms A is parallel to the plane to be machined, and this plane is located 0.5 - 2 mm behind the tip, and the distance between the tips of the two magnetic field focusing heads and the tip is 0.5 - 5 mm; (3) Adjust the XY series slide table along the Y-axis so that the focusing centers of the magnetic field focusing heads in the two magnetic arms A are located at the tip; (4) Ensure that the XY series slide table and the Z-axis rotating ring are locked tightly without loosening, and the magnets in the two magnetic arms and the adjustable magnet chucks are installed tightly without loosening.

4. The six-degree-of-freedom adjustable tip focusing magnetic field generating device according to claim 2, wherein When the cutting direction of the tip is towards the positive Y-axis direction and it is required that the magnetic arm assembly forms a parallel magnetic field at the tip of the turning tool, the operation method of the six-degree-of-freedom adjustable tip focused magnetic field generating device is as follows: (1) Loosen the magnet in the magnetic arm B, and then adjust the XY series slide table in the X-axis direction so that the magnetic field focusing head in the magnetic arm B aligns with the tool shank in the X-axis direction and clamps on the tool shank, so that the magnet and the magnetic field focusing head in the magnetic arm B are naturally adsorbed under the tool shank; (2) Adjust the magnetic fields in magnetic arms A and B so that the tips of the magnetic field focusing heads are in the same plane, and this plane is 0.5 - 2 mm behind the tool tip. Then fix the magnet and the adjustable magnet chuck in magnetic arm A. (3) Adjust the XY series slide in the Y-axis direction so that the distance between the magnetic field focusing head in magnetic arm A and the tool tip is 0.5 - 5 mm. After adjustment, fix the magnet in magnetic arm B on the adjustable magnet chuck in this magnetic arm. (4) Ensure that the XY series slide is tightly locked with the Z-axis rotating ring without looseness, and the magnets in the two magnetic arms are tightly installed on the adjustable magnet chucks without looseness.

5. The six-degree-of-freedom adjustable tip focusing magnetic field generating device according to claim 2, wherein The magnets and the magnetic field focusing heads in the two magnetic arms both use neodymium iron boron permanent magnets and cylindrical oblique cut permalloy magnetic field focusing heads.

6. The six-degree-of-freedom adjustable tip focusing magnetic field generating device according to claim 2, wherein The Z-axis rotating ring and the adjustable magnet chucks in the two magnetic arms are both made of aluminum alloy parts.

7. The six-degree-of-freedom adjustable tip focusing magnetic field generating device according to claim 2, characterized in that, The base and the mounting plate are both made of steel parts.

8. The six-degree-of-freedom adjustable tip focusing magnetic field generating device according to claim 2, wherein, One side of the XY series slide is fixed on the base by 4 M3 screws.

9. The six-degree-of-freedom adjustable tip focusing magnetic field generating device according to claim 2, wherein The Z-axis rotating ring is installed on the XY series slide by 4 M3 screws.

10. The six-degree-of-freedom adjustable tip focusing magnetic field generating device according to claim 2, wherein In the same magnetic arm, the other end of the adjustable magnet chuck is installed on the mounting plate by M4 screws, and the mounting plate is installed on the Z-axis rotating ring by M4 screws.

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