JP2022162416A - Surface treatment device - Google Patents

Abstract

To explain a surface treatment device capable of locally polishing a surface of an object.SOLUTION: A surface treatment device 1A for polishing an inner surface Wa of a non-magnetic or a feebly magnetic object W is provided, comprising: a magnetic tool 3 which comprises a driven side magnetic portion 32 with a fixed a magnetic pole and can polish a surface of an object W by a relative movement to the object W; a magnetic unit 23 which comprises a driving side magnetic portion 26 with a fixed magnetic pole and can attract the driven side magnetic portion 32 by magnetic force; and an electric motor 21 rotating the magnetic unit 23 thereby rotating the magnetic tool 3 around a rotary axial line L passing through the magnetic tool 3.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present disclosure relates to a surface treatment apparatus that polishes the surface of an object such as a laminate-molded product.

Surface treatment methods and apparatus using magnetic force are known. For example, the surface treatment apparatus described in Patent Document 1 introduces slurry containing magnetic abrasive grains into a pipe, rotates a magnet arranged outside the pipe to move the slurry, and thereby smoothes the inner surface of the pipe. Grind. Moreover, the method described in Patent Document 2 polishes the inner surface of the pipe by inserting a ferromagnetic material into the pipe and moving an externally arranged magnet in the longitudinal direction of the pipe.

JP-A-7-227755 JP-A-8-99224

However, with conventional equipment, it is difficult to polish locally, especially in the case of an object with curved unevenness that forms a space inside with a complicated structure, and it is difficult to polish the inner surface. Met.

The present disclosure describes a surface treatment apparatus capable of locally polishing the surface of an object.

One aspect of the present disclosure is a surface treatment apparatus for polishing the surface of a non-magnetic or weakly magnetic object, comprising a driven-side magnetic part to which magnetic poles are fixed, the surface of the object being polished by relative movement with respect to the object. and a driving-side magnetic part to which a magnetic pole is fixed, a movable part capable of attracting the driven-side magnetic part by magnetic force, and a rotation axis passing through the polishing part by rotating the movable part and a driving portion for rotating the polishing processing portion therearound. In the present disclosure, weak magnetism means paramagnetism and diamagnetism.

For example, the polishing section is arranged so as to be in contact with the inner surface of the object forming a space inside, and the movable section is arranged near the outer surface on the opposite side across the object. The object is non-magnetic or weakly magnetic, and the movable part can attract the polishing part by magnetic force. The polishing processing section adheres to the inner surface of the object by being sucked by the movable section. In this state, the drive section rotates the movable section. The magnetic poles of the driving-side magnetic portion of the movable portion and the driven-side magnetic portion of the polishing processing portion are fixed. When the movable portion rotates, both repulsion and attraction due to magnetic force act on the drive-side magnetic portion and the driven-side magnetic portion, and as a result, the polishing processing portion rotates so as to follow the rotation of the movable portion. At that time, the rotation axis of the polishing processing unit is a position passing through the polishing processing unit, and the polishing processing unit rotates while staying at a specific location on the surface of the object to polish the surface of the specific location. . As a result, the surface of the object can be locally polished.

In some embodiments, a control section may be provided that is capable of controlling at least one of the rotational speed of the movable section and the rotational time of the movable section to control the polishability of the polishing processing section that contacts the object. Abrasiveness means polishing strength and polishing time. Polishing intensity and polishing time can be controlled by controlling the rotation speed or rotation time of the movable part. As a result, it becomes possible to perform polishing according to the condition of the surface of the object.

In some embodiments, a position adjusting section that movably holds the movable section, and a separation distance from the polishing section to the movable section is controlled via the position adjusting section to adjust the polishability of the polishing section in contact with the object. and a controllable suction force controller. The separation distance from the polishing processing section to the movable section can be controlled by the suction force control section. As a result, the force with which the polishing processing part adheres to the object is controlled, and the polishing intensity can be controlled.

In some aspects, the drive portion comprises a drive shaft portion connected to the movable portion, the drive shaft portion being disposed on and extending along the rotation axis of the polishing treatment portion. good. The axis of rotation of the polishing process extends substantially across the surface of the object. As a result, the polishing section rotates like a spinning top at a specific position, which is advantageous for polishing flat surfaces.

In some aspects, the drive section includes a drive shaft section connected to the movable section, the axis of rotation of the drive shaft section and the axis of rotation of the polishing section extending parallel to each other, and the movable section is connected to the polishing section. , may be arranged side by side in a lateral direction orthogonal to the rotation axis of the polishing processing unit. A polishing processing section is installed so as to be in contact with the inner surface of the object, and a movable section is arranged near the outer surface. When the movable part is rotated in this state, the polishing processing part rolls and polishes the inner surface, which is advantageous for polishing curved surfaces.

In some aspects, the driven magnetic portion has a fixed magnetic pole and includes one end that is attracted to the drive magnetic portion and the other end that is opposite to the one end, may include a polishing portion fixed to one end and a magnetic holder portion fixed to the other end. The holder portion functions as a yoke, which is advantageous in increasing the magnetic force of the driven side magnetic portion.

According to some aspects of the present disclosure, the surface of the object can be locally abraded.

1 is a front view showing a first surface treatment apparatus according to an example of the present disclosure; FIG. FIG. 2 shows an example of the first surface treatment apparatus, where (a) is a side view and (b) is a schematic diagram corresponding to (a). FIG. 3 shows a magnetic tool, FIG. 3(a) is a perspective view, and FIG. 3(b) is a sectional view taken along line bb in FIG. 3(a). FIG. 4 is a side view of a second surface treatment apparatus according to one example of the present disclosure; FIG. 5 is a schematic cross-sectional view showing a third surface treatment apparatus according to an example of the present disclosure, where (a) is a cross-sectional view orthogonal to the rotation axis, and (b) is a rotation axis. is a cross-sectional view parallel to .

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

First, the technical significance of the surface treatment apparatus according to the present disclosure will be briefly described. First, it is known that the factors that influence the amount of mechanical polishing are proportional to factors derived from pressure, relative motion, machining time, and machining conditions according to Preston's formula. That is, it is necessary to generate pressure and relative motion with respect to the surface to be polished. Here, for example, when the surface to be polished is an inner surface formed inside the space of the object (hereinafter referred to as the "inner surface"), in general, pressure control and appropriate relative motion inside the object is difficult to impart, and it is difficult to form a finished surface by appropriate polishing. On the other hand, according to the surface treatment apparatus of the present disclosure, a small magnetic tool is placed inside the part, and by using the magnetic material permeation phenomenon to indirectly apply pressure control and relative motion from the outside, Allows for proper polishing.

1 and 2 show a first surface treatment apparatus 1A that is an example of the present disclosure. The surface treatment apparatus 1A is an apparatus for polishing and smoothing the surface of a nonmagnetic or weakly magnetic object W. As shown in FIG. As the non-magnetic or weakly magnetic object W, a member using a titanium alloy or a nickel alloy can be used. In addition, the object W may be an object with a complicated shape in which curved unevenness is complicated, and for example, an object formed by layered manufacturing (also referred to as “3D printing”) may be used as the object. can. Note that layered manufacturing is generally effective for manufacturing parts with complicated shapes, and can easily realize a shape that forms a space Sp inside.

According to the surface treatment apparatus 1A of the present disclosure, the inner surface Wa facing the internal space Sp of the object W can be polished. The shape of the object W having the inner surface Wa may be a simple shape such as a straight pipe, a curved or bent pipe, a branched pipe, a sphere, a polyhedron, or a desired three-dimensional shape. There is a frame with a target shape, a box-like shape, and the like. In the present disclosure, a pipe-shaped object W will be described as an example.

The surface treatment apparatus 1A includes a magnetic driving device 2 and a magnetic tool 3 (an example of a polishing processing section). The magnetic driving device 2 and the magnetic tool 3 are physically separated, but have a structure that allows them to be attracted to each other by magnetic force. The cooperation of the magnetic driving device 2 and the magnetic tool 3 enables polishing of the inner surface Wa of the object W. FIG.

The magnetic drive device 2 includes an electric motor 21 (an example of a drive unit), a motor control unit 22 (an example of a control unit) that controls driving of the electric motor 21, and a magnetic unit 23 that rotates by driving the electric motor 21 (a movable unit). an example of the part). The electric motor 21 includes a rotating rotor, a stator arranged around the rotor, and a drive shaft portion 24 connected to the rotor. The motor control unit 22 includes an inverter device that controls the frequency and voltage of electricity input to the electric motor 21 to control the rotation speed and rotation time of the electric motor 21 . The inverter device controls driving of the electric motor 21, for example, so as to achieve a specified value input by a user's operation. Further, the motor control unit 22 may be configured to include a CPU, a memory, etc., drive according to a predetermined program stored in the memory, and control the driving of the electric motor 21 .

The magnetic unit 23 includes a base portion 25 connected to the drive shaft portion 24 of the electric motor 21 and a drive side magnetic portion 26 attached to the base portion 25 . The base portion 25 is a disk-shaped member fixed to the end portion of the drive shaft portion 24 . The base portion 25 has one end portion 25a fixed to the drive shaft portion 24 and the other end portion 25b opposite to the one end portion 25a. A drive-side magnetic portion 26 is fixed to the other end portion 25b. The magnetic poles of the drive-side magnetic portion 26 are physically fixed. For example, different magnetic poles are arranged alternately around the rotation axis L of the drive shaft portion 24 .

The drive-side magnetic portion 26 according to an example of the present disclosure includes two (plurality) permanent magnets 27 . Various magnets such as neodymium magnets, ferrite magnets, and alnico magnets can be used as the permanent magnets 27 .

The two permanent magnets 27 are arranged side by side around the rotation axis L. As shown in FIG. The permanent magnet 27 is cylindrical (disk-shaped) and has both ends 27a and 27b. One end portion 27a of the permanent magnet 27 is fixed to the base portion 25, and the other end portion 27b (hereinafter referred to as "attraction end portion 27b") is exposed so as to face the object W. . Both ends 27a and 27b of the permanent magnet 27 form different magnetic poles. The attraction ends 27b of the two permanent magnets 27 are fixed so as to form different magnetic poles, one attraction end 27b being the N pole and the other attraction end 27b being the S pole. (See FIG. 2(b)). The two permanent magnets 27 can attract the magnetic tool 3 by magnetic force.

In one example of the present disclosure, an example in which two permanent magnets 27 are arranged is described, but an even number of four or more permanent magnets 27 are arranged, and the attraction ends 27b of adjacent permanent magnets 27 each have a different magnetic pole. It is also possible to set it as arrangement|positioning which becomes. Also, a ring magnet in which different magnetic poles are arranged alternately in the circumferential direction, or a segment magnet arranged in an annular shape, in which different magnetic poles are arranged alternately in the circumferential direction. It may be a magnet such as

A material having magnetism, that is, a material having high magnetic permeability is used for the base portion 25 . The base portion 25 functions as a yoke that forms a magnetic circuit with the permanent magnet 27, for example. By arranging the base portion 25 on the side opposite to the attraction end portion 27b, magnetic flux can be prevented from leaking into the atmosphere and the magnetic flux can be concentrated toward the attraction end portion 27b side.

The magnetic tool 3 is arranged so as to be in contact with the inner surface Wa of the object W. As shown in FIG. As shown in FIG. 3 , the magnetic tool 3 is arranged such that the driven magnetic part 32 is sandwiched between the holder part 31 , the driven magnetic part 32 fixed on the holder part 31 , and the holder part 31 . and a polishing cloth 33 fixed to the driven-side magnetic portion 32 . The polishing cloth 33 is an example of a polishing portion. The polishing part is not limited to the polishing cloth 33, and by moving relative to the inner surface Wa (an example of the surface) of the object W (an example of the object), the inner surface Wa is polished to form a smooth finished surface. A wide range of materials that can be formed can be used.

The holder part 31 is, for example, a disc-shaped member, and the driven magnetic part 32 is fixed to one surface thereof. Taking the driven magnetic portion 32 as a reference, the holder portion 31 is arranged on the opposite side of the driven magnetic portion 32 to the polishing pad 33 . A material having magnetism, that is, a material having high magnetic permeability is used for the holder portion 31 . The holder portion 31 functions, for example, as a yoke that forms a magnetic circuit with the driven-side magnetic portion 32 . By arranging the holder portion 31 on the opposite side of the polishing cloth 33, magnetic flux can be prevented from leaking into the atmosphere and the magnetic flux can be concentrated toward the polishing cloth 33 side.

The driven-side magnetic portion 32 according to an example of the present disclosure includes two (plural) permanent magnets 34 . The two permanent magnets 34 are arranged side by side around the rotation axis L passing through the center of the holder portion 31 . Various magnets such as neodymium magnets, ferrite magnets, and alnico magnets can be used as the permanent magnets 27 .

The permanent magnet 34 is cylindrical (disk-shaped) and has both ends 34a and 34b. One end portion 34 a of the permanent magnet 34 is fixed to the holder portion 31 , and the other end portion 34 b (hereinafter referred to as “attracted end portion 34 b ”) is fixed to the polishing cloth 33 . Both ends 34a, 34b of the permanent magnet 34 form different magnetic poles. The attracted ends 34b of the two permanent magnets 34 are fixed so as to form different magnetic poles. It is the south pole.

In one example of the present disclosure, an example in which two permanent magnets 34 are arranged is described, but an even number of four or more permanent magnets 34 are arranged, and the attracted ends 34b of adjacent permanent magnets 34 are different. It is also possible to arrange them so as to form magnetic poles. Also, a ring magnet in which different magnetic poles are arranged alternately in the circumferential direction, or a segment magnet arranged in an annular shape, in which different magnetic poles are arranged alternately in the circumferential direction. It may be a magnet such as

The grain size of the polishing cloth 33 can be selected according to the surface roughness of the object to be polished, and the degree of polishing can be adjusted. For example, in the case of an object with a rough surface such as the object W of the present disclosure, a polishing cloth 33 using an abrasive with a coarse grain size is used, and in the case of a relatively smooth object such as a casting, , a polishing cloth 33 using fine-grained abrasives can be used. Further, by making the abrasive cloth 33 detachable from the driven-side magnetic portion 32, adjustment of the abrasive cloth 33 and replacement of the abrasive cloth 33 when worn are facilitated.

Next, the operation and effects of the surface treatment apparatus 1A will be described with reference to FIG. The surface treatment apparatus 1A includes a magnetic driving device 2 and a magnetic tool 3. The magnetic tool 3 is indirectly magnetically driven by utilizing a magnetic material permeation phenomenon, and the magnetic tool 3 and the object W are moved relative to each other. The desired polishing process is realized by

Specifically, the magnetic tool 3 is arranged so as to be in contact with the inner surface Wa of the object W. As shown in FIG. On the other hand, the magnetic unit 23 is arranged near the outer surface (hereinafter referred to as “outer surface Wb”) opposite to the magnetic tool 3 with the object W interposed therebetween. The term "nearby" means not only a state in which the magnetic unit 23 is in contact with the outer surface Wb, but also a position away from the outer surface Wb of the object W and at a position where the magnetic tool 3 can be attracted via magnetic force. A mode in which the unit 23 is arranged is also included.

The magnetic tool 3 is brought into close contact with the inner surface Wa of the object W by being attracted to the magnetic unit 23 . Due to this close contact, a working force that contributes to polishing can be obtained. In this state, the electric motor 21 rotates the magnetic unit 23 . The magnetic poles of the drive-side magnetic portion 26 of the magnetic unit 23 and the driven-side magnetic portion 32 of the magnetic tool 3 are fixed. When the magnetic unit 23 rotates, both repulsion and attraction due to magnetic force act on the drive-side magnetic part 26 and the driven-side magnetic part 32 , and as a result, the magnetic tool 3 rotates so as to follow the rotation of the magnetic unit 23 . do. On the other hand, the object W is fixed so as to remain at a predetermined position, and the magnetic tool 3 moves relative to the object W to grind the inner surface Wa of the object W. As shown in FIG. Further, the rotation axis L of the magnetic tool 3 is a position passing through the magnetic tool 3 and substantially extends in the normal direction of the inner surface Wa with which the magnetic tool 3 is in close contact. That is, the magnetic tool 3 rotates while remaining at a specific location on the inner surface Wa, and polishes the specific location within a narrow range. As a result, the inner surface Wa of the object W can be locally polished.

Further, by scanning the magnetic unit 23 along the outer surface Wb of the object W, the magnetic tool 3 can be moved. As a result, the inner surface Wa of the object W can be polished even over a wide area to be polished.

In contrast to the polishing method by the surface treatment apparatus 1A of the present disclosure, methods for polishing the inner surface of the object include inner surface grinding, honing, electropolishing, fluid polishing, abrasive flow processing, and the like. However, internal grinding, honing, and electropolishing are disadvantageous for local polishing, and are limited to polishing of inner surfaces of simple shapes. On the other hand, fluid polishing and abrasive flow machining have few restrictions on shape and inner diameter, but are not suitable for rough surfaces such as objects because it is difficult to remove undulations with long wavelengths. Barrel polishing and electrochemical methods have also been proposed as means for surface treatment of objects, but it is difficult to control the amount of polishing, and sufficient processing capability has not been demonstrated for the inner surface. In terms of processing time and the high environmental impact associated with waste liquid, there are issues in mass production application. Furthermore, these methods are considered unsuitable for automation because it is difficult to devise a combination of a robot arm and a magnetic tool.

Compared to these methods, according to the surface treatment apparatus 1A of the present disclosure, the surface of the object W can be locally polished, and even a rough surface such as the object W can be polished to obtain a desired finished surface. can be formed into Furthermore, it can be applied to a robot arm like the second surface treatment apparatus 1B described later, which is advantageous for automation.

The surface treatment apparatus 1A of the present disclosure also includes a motor control section 22 that controls driving of the electric motor 21 . The motor control section 22 controls at least one of the rotation speed of the magnetic unit 23 and the rotation time of the magnetic unit 23 . The motor control unit 22 can control the abrasiveness of the magnetic tool 3 in contact with the object W by controlling the rotation speed and rotation time of the magnetic unit 23 . In the present disclosure, "polishing property" means polishing strength and polishing time. By controlling the rotation speed or rotation time of the magnetic unit 23, the polishing intensity and the polishing time can be controlled. As a result, it becomes possible to polish the surface of the object W (for example, the inner surface Wa) in accordance with the situation.

In one example of the present disclosure, the drive shaft portion 24 of the electric motor 21 is arranged on and extends along the rotation axis L of the magnetic tool 3 . Specifically, the rotation axis L of the magnetic tool 3 extends so as to substantially intersect (perpendicularly) the inner surface Wa of the object W. As shown in FIG. As a result, the magnetic tool 3 rotates, for example, like a spinning top at a specific position (narrow range) on the inner surface Wa, which is advantageous for polishing a planar surface.

In one example of the present disclosure, the magnetic tool 3 includes a holder portion 31 that functions as a yoke. As a result, it is advantageous to increase the magnetic force of the driven side magnetic portion 32 .

Next, a second surface treatment apparatus 1B according to another example of the present disclosure will be described with reference to FIG. The surface treatment apparatus 1B has elements and structures similar to those of the first surface treatment apparatus 1A. In the following description, differences will be mainly described, and similar elements and structures will be given the same reference numerals, and detailed description thereof will be omitted.

The surface treatment apparatus 1B includes a magnetic driving device 2 having a magnetic unit 23, and a magnetic tool 3 capable of polishing the inner surface Wa of the object W by relative movement with respect to the object W. As shown in FIG. Further, the surface treatment apparatus 1B includes a robot arm section 5 capable of gripping the magnetic driving device 2, holding and moving the magnetic driving device 2, and a control device 6 controlling the movement of the robot arm section 5. I have. The controller 6 is also controllably connected to the motor controller 22 of the magnetic drive device 2 . The robot arm section 5 is an example of a position adjustment section that movably holds the magnetic unit 23, and the control device 6 is an example of an attraction force control section.

The robot arm portion 5 includes a plurality of link portions 51 and a joint portion 52 that connects the link portions 51 so that they can tilt and rotate. The tip of the robot arm portion 5 is fixed to a connecting portion 29 provided in the magnetic drive device 2 . The joint part 52 is equipped with an actuator, a speed reducer, an encoder, a transmission mechanism, etc. for moving the link part 51 , and is driven by receiving a control signal from the control device 6 .

The control device 6 is connected to the robot arm section 5 and the motor control section 22 at least by wire or wirelessly, and is configured to be able to transmit and receive control signals. The control device 6 includes a CPU, a memory, and the like, and is driven according to a predetermined program stored in the memory to drive and control the actuators of the robot arm section 5 and the like. The control device 6 can also control the rotation speed and rotation time of the electric motor 21 by transmitting and receiving control signals to and from the motor control section 22 of the magnetic drive device 2 .

The surface treatment apparatus 1B has elements and structures similar to those of the first surface treatment apparatus 1A, and has the same functions and effects as those of the first surface treatment apparatus 1A.

Furthermore, according to the surface treatment apparatus 1B, the robot arm section 5 can move the magnetic driving device 2 to a desired position, so the control device 6 can control the distance D between the magnetic tool 3 and the magnetic unit 23. . In other words, the surface treatment apparatus 1B controls at least one of the separation distance D from the magnetic tool 3 to the magnetic unit 23, the rotation speed of the magnetic unit 23, and the rotation time to adjust the abrasiveness of the magnetic tool 3 in contact with the object W. can be controlled.

In the surface treatment apparatus 1</b>B, the attracting force of the magnetic unit 23 to the magnetic tool 3 can be controlled by controlling the separation distance D from the magnetic tool 3 to the magnetic unit 23 by the control device 6 . As a result, the force with which the magnetic tool 3 adheres to the inner surface Wa of the object W is controlled, and the polishing intensity can be controlled. The control device 6 also controls the rotation speed or rotation time of the magnetic unit 23 via the motor control section 22 by transmitting a control signal to the motor control section 22 of the magnetic drive device 2 . By controlling the rotation speed or rotation time of the magnetic unit 23, the polishing time of the magnetic tool 3 can be controlled, and as a result, the inner surface Wa of the object W can be polished according to the situation.

Further, according to the surface treatment apparatus 1B, the scanning of the magnetic driving device 2 along the outer surface Wb of the object W can be automated by the robot arm portion 5, and the magnetic tool 3 can be moved along the inner surface Wa of the object W. By moving the magnetic tool 3, polishing over a wide range of the inner surface Wa becomes possible.

Next, a third surface treatment apparatus 1C according to another example of the present disclosure will be described with reference to FIG. The surface treatment apparatus 1C has elements and structures similar to those of the first surface treatment apparatus 1A and the second surface treatment apparatus 1B. In the following description, differences will be mainly described, and similar elements and structures will be given the same reference numerals, and detailed description thereof will be omitted.

The surface treatment apparatus 1</b>C includes a magnetic driving device 7 and a magnetic tool 8 . The magnetic drive device 7 includes an electric motor 71 (an example of a drive section), a motor control section 72 that controls the drive of the electric motor 71, and a magnetic unit 73 (movable section) that rotates when the electric motor 71 is driven. there is The electric motor 71 includes a rotating rotor, a stator arranged around the rotor, and a drive shaft portion 74 connected to the rotor. The motor control unit 72 includes an inverter device that controls the frequency and voltage of electricity input to the electric motor 71 to control the rotation speed and rotation time of the electric motor 71 .

The magnetic unit 73 includes a drive-side magnetic portion 76 attached to the drive shaft portion 74 of the electric motor 71 . The magnetic poles of the drive-side magnetic portion 76 are physically fixed. For example, different magnetic poles are arranged alternately around the rotation axis La of the drive shaft portion 74 .

A drive-side magnetic portion 76 according to an example of the present disclosure includes a cylindrical permanent magnet 77 fixed to the peripheral surface of the drive shaft portion 74 . The outer peripheral surface of the permanent magnet 77 is provided with a plurality of regions divided in the circumferential direction as magnetic poles, and the plurality of regions are arranged so that different magnetic poles (N pole and S pole) are alternately arranged. The drive-side magnetic portion 76 is arranged such that the rotation axis La extends in the tangential direction of the outer surface Wb of the object W. As shown in FIG. As a result, the drive-side magnetic part 76 rotates so as to roll on the outer surface Wb of the object W. As shown in FIG. For the drive-side magnetic portion 76, various magnets in which different magnetic poles are arranged alternately in the circumferential direction can be used, such as segment magnets.

The magnetic tool 8 is arranged so as to be in contact with the inner surface Wa of the object W. As shown in FIG. The magnetic tool 8 includes a shaft portion 81 serving as a cylindrical core portion, a driven side magnetic portion 82 fixed around the shaft portion 81, and a polishing cloth 83 fixed around the shaft portion 81. there is For the shaft portion 81, for example, a magnetic material, that is, a material with high magnetic permeability can be used.

The driven-side magnetic portion 82 according to an example of the present disclosure includes a cylindrical permanent magnet 87 . The permanent magnet 87 is arranged around the rotation axis Lb passing through the center of the shaft portion 81 . The outer peripheral surface of the permanent magnet 87 is provided with a plurality of regions divided in the circumferential direction as magnetic poles, and the plurality of regions are arranged so that different magnetic poles (N pole and S pole) are alternately arranged. The driven-side magnetic portion 82 is arranged such that the rotation axis Lb extends in the tangential direction of the inner surface Wa of the object W. As shown in FIG. As a result, the driven-side magnetic part 82 rotates so as to roll on the inner surface Wa of the object W. As shown in FIG. For the driven-side magnetic portion 82, various types of magnets in which different magnetic poles are arranged alternately in the circumferential direction can be used, such as segment magnets.

According to the surface treatment apparatus 1C, the same elements and structures as those of the first surface treatment apparatus 1A or the second surface treatment apparatus 1B are provided, and the first surface treatment apparatus 1A or the second surface treatment apparatus described above is provided. It has the same function and effect as 1B.

Further, the electric motor 71 of the surface treatment apparatus 1C has a drive shaft portion 74 connected to the magnetic unit 73, and the rotation axis La of the drive shaft portion 74 and the rotation axis Lb of the magnetic tool 8 extend in parallel. . The magnetic unit 73 is arranged side by side with respect to the magnetic tool 8 in a lateral direction perpendicular to the rotation axis Lb. In the surface treatment apparatus 1C, the magnetic tool 8 is installed so as to be in contact with the inner surface Wa of the object W, and the magnetic unit 73 is arranged near the outer surface Wb of the object W. As shown in FIG. When the magnetic unit 73 is rotated in this state, the magnetic tool 8 rolls and polishes the inner surface Wa, which is advantageous for polishing curved surfaces.

The present disclosure is not limited to only the embodiments described above. For example, in the above-described embodiments, the target object was described as an example, but the target object is not limited to the target object, and includes nonmagnetic or weakly magnetic products that require surface polishing. In addition, the part to be polished is not limited to the inner surface. may be in any form.

1A First surface treatment apparatus 1B Second surface treatment apparatus 1C Third surface treatment apparatus 3 Magnetic tool (polishing processing section)
5 Robot arm part (position adjustment part)
6 control device (suction force control unit)
8 magnetic tool 31 holder portion 32 driven side magnetic portion 33 polishing cloth (polishing portion)
34a end (the other end of the driven side magnetic portion)
34b Attracted end (one end of driven magnetic part)
21 electric motor (drive unit)
22 motor control unit (control unit)
23 magnetic unit (moving part)
24 drive shaft portion 26 drive side magnetic portion 74 drive shaft portion 76 drive side magnetic portion 82 driven side magnetic portion L rotation axis La rotation axis Lb of drive shaft portion rotation axis W of magnetic tool object

Claims (6)

A surface treatment device for polishing the surface of a nonmagnetic or weakly magnetic object,
a polishing processing unit comprising a driven-side magnetic unit having a fixed magnetic pole and capable of polishing the surface by relative movement with respect to the object;
a movable part including a drive-side magnetic part with a fixed magnetic pole, and capable of attracting the driven-side magnetic part by magnetic force;
and a drive unit that rotates the polishing processing unit about a rotation axis passing through the polishing processing unit by rotating the movable unit. a control unit capable of controlling at least one of the rotation speed of the movable unit and the rotation time of the movable unit via the drive unit to control the polishing performance of the polishing processing unit in contact with the object; 2. The surface treatment apparatus of claim 1, wherein a position adjusting section that movably holds the movable section;
a suction force control unit capable of controlling the separation distance from the polishing processing unit to the movable unit via the position adjusting unit to control the polishability of the polishing processing unit in contact with the object; 3. The surface treatment apparatus according to claim 2, wherein The drive section includes a drive shaft section connected to the movable section,
4. The surface treatment apparatus according to claim 1, wherein said drive shaft portion is arranged on said rotation axis of said polishing portion and extends along said rotation axis. The drive section includes a drive shaft section connected to the movable section,
the rotation axis of the drive shaft portion and the rotation axis of the polishing processing portion extend in parallel,
4. The surface processing apparatus according to claim 1, wherein said movable portion is arranged side by side with respect to said polishing processing portion in a lateral direction orthogonal to said rotation axis of said polishing processing portion. The driven-side magnetic portion has a magnetic pole fixed and includes one end attracted to the drive-side magnetic portion and the other end opposite to the one end,
6. The polishing section according to any one of claims 1 to 5, wherein the polishing processing section comprises a polishing section fixed to the one end, and a holder section fixed to the other end and having magnetism. A surface treatment apparatus according to claim 1.

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