JP4414917B2 - Surface treatment equipment - Google Patents

Description

  The present invention relates to a surface treatment apparatus for roughening the surface of a workpiece by causing magnetic abrasive grains to collide with the outer surface of the workpiece formed in a cylindrical shape, a columnar shape, or a plate shape, for example. .

  In order to roughen the outer surface of the workpiece formed in a cylindrical shape, a columnar shape, or a plate shape, a rotating magnetic field that moves the magnetic abrasive grains by enclosing the magnetic abrasive grains and the workpiece in a storage tank. Surface treatment device that roughens the outer surface by randomly exciting the magnetic abrasive grains by the electromagnetic force acting between the rotating magnetic field and the magnetic abrasive grains and causing them to collide with the workpiece (For example, refer to Patent Documents 1 to 4).

This type of surface treatment apparatus is known to have higher processing efficiency than a sand blasting apparatus or a shot blasting apparatus in which abrasive grains are ejected by air pressure or water pressure and the abrasive grains collide with a workpiece.
JP 2003-305634 A JP 2001-138207 A Japanese Patent No. 3486221 JP 61-38862 A

  However, the surface treatment apparatuses described in Patent Documents 1 to 4 described above are still in the development stage, and those that enable surface treatment of a large amount of workpieces have not been put into practical use.

  Since the surface treatment apparatus described in Patent Documents 1 to 4 described above positions the magnetic abrasive grains in the rotating magnetic field, the magnetic abrasive grains are gradually magnetized. Then, the movement of the magnetized magnetic abrasive grains may be reduced. In the worst case, the magnetic abrasive grains may not move in the rotating magnetic field.

  For this reason, in the conventional surface treatment apparatus, the magnetic abrasive grain taken out from each storage tank or from the inside of the storage tank has been demagnetized by using a demagnetization apparatus separate from the surface treatment apparatus. As described above, in the conventional surface treatment apparatus, it is necessary to periodically demagnetize the magnetic abrasive grains, the work efficiency of the surface treatment is lowered, and a large amount of workpieces are continuously subjected to the surface treatment. It was difficult.

  Further, in the surface treatment apparatus described above, a rotating magnetic field is always generated during the surface treatment, so that power consumption tends to become very high when further improving the processing efficiency. Further, when the total length of the coil for generating the rotating magnetic field is increased, the loss of electromagnetic force of the rotating magnetic field generated in the coil is increased, and the processing efficiency is also reduced.

  As described above, the conventional surface treatment apparatus described above is an apparatus at the development stage, so it is effective for studying processing in a short time. The power consumption during long-time use is large and magnetic abrasive grains made of a magnetic material are used. Since it is difficult to demagnetize the residual magnetization in a short time, it is difficult to perform a surface treatment of a large amount of processed material.

  Thus, these problems cannot be ignored in a mass production apparatus that is required to perform continuous machining for a long time. Therefore, it has become a new subject to provide a surface treatment apparatus capable of processing in a short time when performing continuous processing for a long time and suppressing power consumption.

  The present invention has been made in view of the above background, and it is possible to easily demagnetize magnetic abrasive grains and to provide a surface treatment apparatus capable of improving the processing efficiency of surface treatment. It is aimed.

  The inventors of the present invention, when the magnetic abrasive grains suddenly come out from within the rotating magnetic field, the strength of the magnetic field acting on the magnetic abrasive grains decreases rapidly, so that the magnetic domains aligned in the magnetic abrasive grains, The present invention was invented by paying attention to the fact that the magnetization is weakened by the irregularity and the magnetic abrasive grains are demagnetized. That is, the present invention moves the magnetic field generator to move the rotating magnetic field and the magnetic abrasive grains relatively, and causes the magnetic abrasive grains to suddenly escape from the rotating magnetic field, thereby demagnetizing the magnetic abrasive grains. I'm trying to do that.

That is, the surface treatment apparatus according to claim 1 generates a cylindrical storage tank for storing a workpiece and magnetic abrasive grains, and a rotating magnetic field for moving the magnetic abrasive grains in the storage tank. And a magnetic field generator that causes the magnetic abrasive grains to collide with the object to be processed by the rotating magnetic field, and a moving unit that moves the magnetic field generator along the longitudinal direction of the storage tank , Partitioning means for partitioning the space in the storage tank along the longitudinal direction of the storage tank is provided.

  The surface treatment apparatus according to a second aspect is the surface treatment apparatus according to the first aspect, further comprising holding means for holding the object to be processed at the center of the storage tank.

  A surface treatment apparatus according to a third aspect is the surface treatment apparatus according to the second aspect, wherein the magnetic field generation unit moves the magnetic abrasive grains on the outer periphery of the workpiece.

  The surface treatment apparatus according to claim 4 is the surface treatment apparatus according to claim 3, further comprising a rotating means for rotating the object to be processed around an axis parallel to the longitudinal direction of the storage tank. It is said.

  The surface treatment apparatus according to claim 5 is the surface treatment apparatus according to any one of claims 1 to 4, wherein an overall length of the magnetic field generation unit in the axial direction is the height of the storage tank. It is characterized by being formed shorter than the entire length in the longitudinal direction.

  The surface treatment apparatus according to claim 6 is the surface treatment apparatus according to any one of claims 1 to 5, further comprising: a magnetic field changing unit that changes the strength of the magnetic field generated by the magnetic field generation unit. It is characterized by having prepared.

The surface treatment apparatus according to claim 7 is the surface treatment apparatus according to any one of claims 1 to 6 , wherein the partition means is made of a nonmagnetic material. .

The surface treatment apparatus according to claim 8 is the surface treatment apparatus according to any one of claims 1 to 7 , wherein the partition means are spaced apart from each other along the longitudinal direction of the storage tank. It is characterized by the fact that a plurality are arranged side by side.

The surface treatment apparatus according to claim 9 is the surface treatment apparatus according to any one of claims 1 to 8 , wherein an outer wall of the storage tank is formed in a single structure. Yes.

The surface treatment apparatus according to claim 10 is the surface treatment apparatus according to any one of claims 1 to 9 , wherein the storage tank is at least one end in the longitudinal direction to the outside of the magnetic abrasive grains. It is characterized by providing a sealing plate for restricting the outflow of water.

  In general, magnetic abrasive grains made of a magnetic material are magnetized when a magnetic field generator generates a rotating magnetic field. However, according to the surface treatment apparatus of the first aspect, when the magnetic field generation unit moves, the magnetic abrasive grains suddenly escape from the rotating magnetic field at the same time as the workpiece is processed. For this reason, the strength of the magnetic field acting on the magnetic abrasive grains changes abruptly (decreases), and the magnetic domains aligned in the magnetic abrasive grains become uneven, thereby weakening the magnetization and simultaneously with the processing of the workpiece. It has the effect of removing the residual magnetization of the magnetic abrasive grains.

As a result, a degaussing device or the like that removes the residual magnetization of the magnetic abrasive grains separate from the surface treatment device of the present invention becomes unnecessary. Therefore, it is possible to easily demagnetize the magnetic abrasive grains, and it is possible to continuously process the object to be processed for a long time, thereby improving the processing efficiency of the surface treatment. Therefore, it is possible to obtain a surface treatment apparatus as a mass production apparatus on the premise of mass production of a workpiece.
Since the storage tank is cylindrical, it does not hinder the circumferential behavior of the magnetic abrasive grains when a rotating magnetic field is applied to the magnetic abrasive grains. Therefore, stable processing is possible.
The partition means partitions the space in the storage tank in the longitudinal direction. For this reason, the partition means limits the area (rotation / revolution area) in which the magnetic abrasive grains can move, and enables more efficient processing.
Moreover, since it can control that a magnetic abrasive grain moves beyond a partition means, a magnetic abrasive grain and a rotating magnetic field can be moved relatively reliably, and this magnetic abrasive grain can be demagnetized reliably. Therefore, the time for demagnetizing the magnetic abrasive grains can be shortened in addition to the processing of the workpiece. For this reason, the continuous processing over a long time of a processing object becomes possible, and the processing efficiency of surface treatment can be improved more. Therefore, it is possible to reliably obtain a surface treatment apparatus as a mass production apparatus on the premise of mass production of a workpiece.

  According to the surface treatment apparatus of the second aspect, since the workpiece is held at the center of the storage tank, the magnetic abrasive grains can collide with the outer surface of the workpiece substantially uniformly. Therefore, the outer surface of the workpiece can be processed uniformly.

  According to the surface treatment apparatus of the third aspect, the magnetic abrasive grains move on the outer periphery of the workpiece, so that the magnetic abrasive grains can be reliably collided with the outer surface of the workpiece, The object can be reliably processed.

  According to the surface treatment apparatus of the fourth aspect, since the workpiece is rotated, the magnetic abrasive grains can be uniformly collided with the outer surface of the workpiece. Therefore, the outer surface of the object to be processed can be processed more uniformly.

  According to the surface treatment apparatus of the fifth aspect, since the magnetic field generation section is shorter than the storage tank, the magnetic field generation section is generated in the storage tank rather than using a surface treatment apparatus having a length substantially equal to that of the storage tank. Loss of rotating magnetic field can be reduced. Accordingly, it is possible to improve the processing efficiency of the processing target and further reduce power consumption.

  Moreover, since a magnetic field generation | occurrence | production part is shorter than a storage tank, it becomes possible to support the both ends of a storage tank. As a result, the storage tank can be prevented from vibrating (moving) due to movement of the magnetic abrasive grains, etc., and the magnetic abrasive grains can collide more uniformly with the outer surface of the workpiece, and the outer surface of the workpiece Can be processed even more uniformly.

  According to the surface treatment apparatus of claim 6, the outer surface of the object to be processed can be obtained by arbitrarily changing the strength of the rotating magnetic field (for example, gradually increasing or decreasing the rotating magnetic field). Can be processed to be more uniform in the circumferential direction and the longitudinal direction.

According to the surface treatment apparatus of claim 7 , the partition means is not magnetized, and the partition means does not interfere with the behavior of the magnetic abrasive grains, and shavings are not magnetized and stick to the partition means. It becomes possible to perform processing stably.

According to the surface treatment apparatus of the eighth aspect , since a plurality of partitioning means are provided, the roughening range of the outer surface of the workpiece can be divided. For this reason, the partition means reliably limits the region (rotation / revolution region) in which the magnetic abrasive grains can move, thereby enabling more efficient processing.

  Moreover, since it can control that a magnetic abrasive grain moves beyond a partition means, demagnetization of a magnetic abrasive grain can be performed reliably. Therefore, the time for demagnetizing the magnetic abrasive grains can be shortened in addition to the processing of the workpiece. For this reason, the continuous processing over a long time of a processing object becomes possible, and the processing efficiency of surface treatment can be improved more. Therefore, it is possible to reliably obtain a surface treatment apparatus as a mass production apparatus on the premise of mass production of a workpiece.

According to the surface treatment apparatus of claim 9 , since the outer wall of the storage tank has a single structure, it is possible to shorten the distance from the magnetic field generator to the object to be processed, and the rotating magnetic field generated by the magnetic field generator. Can be used for processing more efficiently. For this reason, it is possible to improve the processing efficiency, further reduce the power consumption, the effect is further enhanced by continuous processing, and it becomes possible to produce as a mass production device on the premise of mass production .

According to the surface treatment apparatus of claim 10 , it is possible to prevent the magnetic abrasive grains from flowing out of the storage tank, and it is possible to improve workability and productivity at the time of processing. Will become even higher, enabling production as a mass production device on the premise of mass production.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing the configuration of the surface treatment apparatus according to the first embodiment of the present invention. 2 is a cross-sectional view of the storage tank and the like of the surface treatment apparatus shown in FIG.

  The surface treatment apparatus 1 roughens the outer surface of a cylindrical workpiece 2 (shown in FIG. 2) such as a developing roller or a charging roller used in an image forming apparatus such as a copying machine, a facsimile machine, or a printer. Device. The outer diameter of the workpiece 2 is preferably about 17 mm to 18 mm. The length of the workpiece 2 in the direction of the axis P (indicated by the alternate long and short dash line in FIG. 2) is preferably about 300 mm to 350 mm.

  As shown in FIG. 1, the surface treatment apparatus 1 includes a base 3, a fixed holding unit 4, an electromagnetic coil moving unit 5 as a moving means, a moving holding unit 6, a moving chuck unit 7, and a magnetic field generating unit. The electromagnetic coil 8, the storage tank 9, the collection | recovery part 10, and the cooling part 11 are provided.

  The base 3 is formed in a flat plate shape and is installed on a factory floor or table. The upper surface of the base 3 is kept parallel to the horizontal direction. The planar shape of the base 3 is formed in a rectangular shape.

  The fixed holding portion 4 includes a plurality of support columns 12 erected from one end in the longitudinal direction of the base 3 (hereinafter, indicated by an arrow X), a holding base 13, a standing bracket 14, a cylindrical holding member 15, and a holding member. And a chuck 16.

  The holding base 13 is formed in a flat plate shape and is attached to the upper end of the support column 12. The standing bracket 14 is formed in a flat plate shape and stands from the holding base 13. The cylindrical holding member 15 is formed in a cylindrical shape, and is attached to the standing bracket 14 and the holding base 13. The cylindrical holding member 15 is disposed closer to the center of the base 3 than the upright bracket 14 in a state in which the axis is parallel to both the horizontal direction and the arrow X. The cylindrical holding member 15 accommodates flange members 51b, 51c, 51d (that is, one end portion 9a), which will be described later, attached to one end portion 9a, which will be described later, of the storage tank 9.

  The holding chuck 16 is disposed in the vicinity of the above-described cylindrical holding member 15, that is, the holding base 13, and is attached to the above-described base 3. The holding chuck 16 chucks the storage tank 9 in which the one end 9 a is stored in the cylindrical holding member 15, and holds the one end 9 a of the storage tank 9. The fixed holding portion 4 having the above-described configuration holds the one end portion 9 a of the storage tank 9.

  The electromagnetic coil moving unit 5 includes a pair of linear guides 17, an electromagnetic coil holding base 18, and an electromagnetic coil moving actuator 19. The linear guide 17 includes a rail 20 and a slider 21. The rail 20 is installed on the base 3. The rail 20 is formed in a straight line, and its longitudinal direction is arranged in parallel to the longitudinal direction of the base 3, that is, the arrow X. The slider 21 is supported by the rail 20 so as to be movable along the longitudinal direction of the rail 20, that is, along the arrow X. In the pair of linear guides 17, the rails 20 are arranged at intervals from each other along the width direction of the base 3 (hereinafter, indicated by an arrow Y). Of course, the arrow X and the arrow Y are orthogonal to each other and parallel to the horizontal direction.

  The electromagnetic coil holding base 18 is formed in a flat plate shape and is mounted on the slider 21 described above. The upper surface of the electromagnetic coil holding base 18 is arranged in parallel with the horizontal direction. The electromagnetic coil holding base 18 installs the electromagnetic coil 8 on the surface. The electromagnetic coil moving actuator 19 is attached to the base 3 and slides the electromagnetic coil holding base 18 along the arrow X. The above-described electromagnetic coil moving unit 5 slides the electromagnetic coil holding base 18, that is, the electromagnetic coil 8 along the arrow Y by the electromagnetic coil moving actuator 19. Moreover, the moving speed of the electromagnetic coil 8 by the electromagnetic coil moving part 5 can be changed between 0 mm / second and 300 mm / second. Furthermore, the moving range of the electromagnetic coil 8 of the electromagnetic coil moving part 5 is about 600 mm.

  The movable holding unit 6 includes a pair of linear guides 22, a holding base 23, a first actuator 24, a second actuator 25, a moving base 26, a bearing rotating unit 27, and a holding chuck 28. .

  The linear guide 22 includes a rail 29 and a slider 30. The rail 29 is installed on the base 3. The rail 29 is formed in a straight line, and its longitudinal direction is arranged in parallel with the arrow X, that is, the longitudinal direction of the base 3. The slider 30 is supported by the rail 29 so as to be movable along the longitudinal direction of the rail 29, that is, along the arrow X. In the pair of linear guides 22, rails 29 are arranged at intervals along the arrow Y, that is, the width direction of the base 3.

  The holding base 23 is formed in a flat plate shape and is mounted on the slider 30 described above. The upper surface of the holding base 23 is arranged in parallel with the horizontal direction. The first actuator 24 is attached to the base 3 and slides the holding base 23 described above along the arrow X.

  The second actuator 25 is attached to the holding base 23 and slides the moving base 26 along the arrow Y. The moving base 26 is formed in a flat plate shape, and its upper surface is arranged in parallel with the horizontal direction.

  The bearing rotating unit 27 includes a pair of bearings 31, a hollow holding member 32, a driving motor 33 as a rotating means, and a chuck cylinder 34. The pair of bearings 31 are arranged on the moving base 26 while being spaced apart from each other along the arrow X. The hollow holding member 32 is formed in a cylindrical shape and is supported by the bearing 31 described above so as to be rotatable around the axis. The hollow holding member 32 has its axis arranged in parallel with the arrow X described above, that is, the axis of the cylindrical holding member 15 of the fixed holding unit 4. The hollow holding member 32 is shaped so as to protrude from the moving base 26 toward the fixed holding portion 4 so that the one end 32 a is located in the storage tank 9, and the other end 32 c is located on the moving base 26. Arranged in the state. The hollow holding member 32 is passed through the cylindrical workpiece 2 as shown in FIG. A pulley 35 is fixed to the other end portion 32 c of the hollow holding member 32 positioned on the moving base 26. The pulley 35 is disposed coaxially with the hollow holding member 32.

  The drive motor 33 is installed on the moving base 26, and a pulley 36 is attached to the output shaft thereof. The axis of the output shaft of the drive motor 33 is parallel to the arrow X. An endless timing belt 37 is wound around the pulleys 35 and 36 described above. The drive motor 33 rotates the hollow holding member 32 around the axis. The drive motor 33 rotates the hollow holding member 32 around the axis to rotate the workpiece 2 around the axis of the hollow holding member 32 parallel to the longitudinal direction of the storage tank 9.

  The chuck cylinder 34 includes a cylinder body 38 installed on the moving base 26 and a chuck shaft 39 slidably provided on the cylinder body 38. The chuck shaft 39 is formed in a cylindrical shape, and its longitudinal direction is arranged in parallel with the arrow X. The chuck shaft 39 is accommodated in the hollow holding member 32 and is disposed coaxially with the hollow holding member 32. A plurality of pairs of chuck claws 40 are attached to the chuck shaft 39.

  The pair of chuck claws 40 are attached to the chuck shaft 39 so as to protrude from the outer peripheral surface of the chuck shaft 39 in the outer peripheral direction of the chuck shaft 39. Further, the chuck pawl 40 can protrude from the outer peripheral surface of the hollow holding member 32 toward the outer periphery of the hollow holding member 32. The chuck claws 40 are provided so that the amount of protrusion from the chuck shaft 39 and the hollow holding member 32 can be changed. The plurality of pairs of chuck claws 40 are arranged at intervals along the longitudinal direction of the chuck shaft 39, that is, the arrow X. When the chuck shaft 39 of the chuck cylinder 34 is reduced in the direction approaching the cylinder body 38, the amount of protrusion of the pair of chuck claws 40 from the chuck shaft 39 and the hollow holding member 32 increases.

  In the chuck cylinder 34 described above, when the chuck shaft 39 is reduced to the cylinder body 38, the chuck pawl 40 protrudes further toward the outer periphery of the chuck shaft 39, and the chuck pawl 40 is attached to the outer periphery of the hollow holding member 32. The chuck shaft 39, the hollow holding member 32, and the workpiece 2 are fixed by pressing against the inner peripheral surface of the workpiece 2. At this time, of course, the chuck shaft 39, the hollow holding member 32, the workpiece 2, and a cylindrical member 50 described later, that is, the storage tank 9 are coaxial.

  The chuck cylinder 34 and the chuck pawl 40 described above hold the workpiece 2 so as to be coaxial with the hollow holding member 32 and the storage tank 9. That is, the chuck cylinder 34 and the chuck pawl 40 hold the workpiece 2 at the center of the storage tank 9. The above-described chuck cylinder 34 and chuck claw 40 constitute holding means described in the claims.

  The holding chuck 28 is installed on the moving base 26 described above. The holding chuck 28 chucks a flange member 51a (described later) attached to the other end 9b of the storage tank 9, and holds the other end 9b of the storage tank 9. The holding chuck 28 restricts the storage tank 9 from rotating about its axis.

  The movement holding unit 6 having the above-described configuration moves the holding chuck 28, the hollow holding member 32, and the like along the arrows X and Y orthogonal to each other by the actuators 24 and 25. That is, the movement holding unit 6 moves the storage tank 9 held by the holding chuck 28 along the arrows X and Y.

  The moving chuck unit 7 includes a holding base 41, a linear guide 42, and a holding chuck 43. The holding base 41 is fixed to an end portion of the linear guide 22 near the fixed holding portion 4 of the rail 29. The holding base 41 is formed in a flat plate shape, and its upper surface is arranged in parallel with the horizontal direction.

  The linear guide 42 includes a rail 44 and a slider 45. The rail 44 is installed on the holding base 41. The rail 44 is formed in a straight line, and its longitudinal direction is arranged in parallel with the arrow Y, that is, the width direction of the base 3. The slider 45 is supported by the rail 44 so as to be movable along the longitudinal direction of the rail 44, that is, along the arrow Y.

  The holding chuck 43 is installed on the slider 45. The holding chuck 43 is positioned between the holding chucks 16 and 28 described above. The holding chuck 43 holds the storage tank 9 by chucking a portion near the other end 9 b of the storage tank 9. The moving chuck portion 7 described above positions the storage tank 9 by the holding chuck 43 holding the storage tank 9. The movable chuck portion 7 holds the storage tank 9 in cooperation with the above-described holding chuck 28 when the storage tank 9 moves along the axis by holding the storage tank 9 by the holding chuck 43. Thus, the storage tank 9 is prevented from falling off the bearing rotating portion 27, that is, the surface treatment apparatus 1.

  As shown in FIG. 2, the electromagnetic coil 8 includes an outer skin 46 formed in a cylindrical shape and a plurality of coil portions 47 arranged in the outer skin 46, and is formed in an annular shape as a whole. The inner diameter of the electromagnetic coil 8 is larger than the outer diameter of the storage tank 9. That is, a space is formed between the inner peripheral surface of the electromagnetic coil 8 and the outer peripheral surface of the storage tank 9. Further, the total length of the electromagnetic coil 8 in the axial direction is sufficiently shorter than the total length of the storage tank 9 in the axial direction. The total length of the electromagnetic coil 8 in the axial direction is preferably 2/3 or less of the total length of the storage tank 9 in the axial direction. In the illustrated example, the inner diameter of the electromagnetic coil 8 is 90 mm, and the length of the electromagnetic coil 8 in the axial direction is 85 mm.

  The outer skin 46 is attached to the above-described electromagnetic coil holding base 18 with its axis, that is, the axis of the electromagnetic coil 8 itself, parallel to the arrow X. The electromagnetic coil 8 is disposed coaxially with the hollow holding member 32, the chuck shaft 39 and the storage tank 9. The plurality of coil portions 47 are arranged in parallel along the circumferential direction of the outer skin 46, that is, the electromagnetic coil 8. The coil unit 47 is applied by a three-phase AC power source 48 shown in FIG. The plurality of coil portions 47 are applied with power that is shifted from each other, and the plurality of coil portions 47 generate magnetic fields that are out of phase with each other. And the electromagnetic coil 8 produces | generates the magnetic field (rotating magnetic field) of the rotation direction around the axial center of this electromagnetic coil 8 formed by synthesize | combining these magnetic fields inside.

  The electromagnetic coil 8 described above is applied from a three-phase AC power supply 48 to generate a rotating magnetic field, and is moved by the electromagnetic coil moving unit 5 along the longitudinal direction of its axis, that is, the storage tank 9. And the electromagnetic coil 8 positions the below-mentioned magnetic abrasive grain 65 on the outer periphery of the workpiece 2 by the rotating magnetic field described above, and rotates the magnetic abrasive grain 65 around the axis of the storage tank 9 and the workpiece 2 ( Move). The electromagnetic coil 8 causes the magnetic abrasive grains 65 to collide with the outer surface of the workpiece 2 by the rotating magnetic field described above.

  Further, an inverter 49 as a magnetic field changing unit is provided between the three-phase AC power supply 48 and the electromagnetic coil 8. The inverter 49 can freely change the frequency, current value, and voltage value of the power applied to the electromagnetic coil 8 by the three-phase AC power supply 48. The inverter 49 changes the frequency, current value, and voltage value of the power applied to the electromagnetic coil 8 to increase or decrease the power applied to the electromagnetic coil 8 by the three-phase AC power supply 48, thereby generating the electromagnetic coil 8. Change the strength of the rotating magnetic field.

  As shown in FIG. 2, the storage tank 9 includes a cylindrical member 50 having a single outer wall (the outer wall is made of a single wall), a plurality of flange members 51, a pair of shaving sealing holders 52, A pair of shavings sealing plates 53, a pair of positioning members 54, a partition member 55 as a plurality of partitioning means, and a pair of sealing plates 56 are provided.

  The cylindrical member 50 is formed in a cylindrical shape and constitutes an outer shell of the storage tank 9. For this reason, the storage tank 9 is formed in a cylindrical shape while the outer wall is formed in a single structure because the cylindrical member 50 is formed in a single structure. The outer diameter of the cylindrical member 50, that is, the storage tank 9, is desirably about 40 mm to 80 mm. Furthermore, the thickness of the cylindrical member 50 is desirably about 0.5 mm to 2.0 mm. The length of the cylindrical member 50 in the axial direction is preferably about 600 mm to 800 mm. The cylindrical member 50 is made of a nonmagnetic material.

  The cylindrical member 50 is provided with a plurality of abrasive grain supply holes 57. Of course, the abrasive grain supply hole 57 passes through the cylindrical member 50 and communicates with the inside and outside of the cylindrical member 50. A sealing cap 58 is attached to the abrasive grain supply hole 57. The abrasive grain supply hole 57 passes the magnetic abrasive grains 65 inward, and puts the magnetic abrasive grains 65 into and out of the cylindrical member 50, that is, the storage tank 9. Further, the sealing cap 58 closes the abrasive grain supply hole 57 and restricts the magnetic abrasive grains 65 from flowing out of the cylindrical member 50, that is, the storage tank 9.

  The plurality of flange members 51 are formed in an annular shape or a cylindrical shape. Most flange members 51 (three in the illustrated example) except for one of the plurality of flange members 51 are attached to one end portion 9a of the cylindrical member 50, and one flange member 51 (hereinafter denoted by reference numeral 51a). ) Is attached to the other end 9 b of the cylindrical member 50.

  One flange member 51 (hereinafter, denoted by reference numeral 51b) among the plurality of flange members 51 attached to the one end 9a of the cylindrical member 50 is formed in an annular shape and is fitted to the outer periphery of the cylindrical member 50. Yes. Another flange member 51 (hereinafter denoted by reference numeral 51c) is formed in an annular shape and is fitted to the outer periphery of the flange member 51b described above. The remaining flange member 51 (hereinafter denoted by reference numeral 51d) is integrally provided with an annular ring portion 59 and a cylindrical column portion 60. The ring part 59 is standing upright from the outer edge of the cylindrical part 60. As for the flange member 51d, the ring part 59 is fitted to the outer periphery of the flange member 51c.

  One flange member 51 a described above is formed in an annular shape and is fitted to the outer periphery of the other end portion 9 b of the cylindrical member 50. The flange member 51a passes through the hollow holding member 32 inside. One end 9 a of the cylindrical member 50 forms one end of the storage tank 9, and the other end 9 b of the cylindrical member 50 forms the other end of the storage tank 9.

  Each of the pair of shavings sealing holders 52 is formed in an annular shape. One shaving sealing holder 52 is fitted to the inner circumference of one end 9 a of the cylindrical member 50, and the other shaving sealing holder 52 is fitted to the inner circumference of the other end 9 b of the cylindrical member 50. ing. The other shaving sealing holder 52 passes through the hollow holding member 32 inside.

  The pair of shavings sealing plates 53 are each formed in a mesh shape. One shaving sealing plate 53 is formed in a disc shape and is disposed on the inner periphery of the one end portion 9a of the cylindrical member 50, and is attached to the one shaving sealing holder 52 described above. . The other shaving sealing plate 53 is formed in an annular shape, and is disposed on the inner periphery of the other end 9b of the cylindrical member 50, and is attached to the other shaving sealing holder 52 described above. . The other shavings sealing plate 53 passes through the hollow holding member 32 inside. The shaving sealing plate 53 has a cylindrical member 50, that is, a storage tank 9, in which shavings formed by the later-described magnetic abrasive grains 65 colliding with the outer surface of the workpiece 2 and scraped off from the workpiece 2. Regulates leaking outside.

  The pair of positioning members 54 are formed in a cylindrical shape. One positioning member 54 is fitted to the outer periphery of one end 32 a which is a free end of the hollow holding member 32. The other positioning member 54 is located in the cylindrical member 50 and is fitted to the outer periphery of the central portion 32b of the hollow holding member 32 near the other end portion 9b. The pair of positioning members 54 position the workpiece 2 on the hollow holding member 32 with the workpiece 2 sandwiched between them. Note that the one end portion 32 a is an end portion of the hollow holding member 32 that is close to the fixed holding portion 4 and away from the moving holding portion 6. The central portion 32 b is on the side inside the storage tank 9 and away from the fixed holding portion of the hollow holding member 32, and forms an end near the moving holding portion 6.

  The partition member 55 includes a main body portion 61 formed in an annular shape and a mesh portion 62. The main body 61, that is, the partition member 55 is fitted to the inner periphery of the cylindrical member 50, is attached to the cylindrical member 50, and passes through the hollow holding member 32 inside. The main body 61, that is, the plurality of partition members 55 are arranged between the pair of shavings sealing plates 53. Further, the main body portion 61, that is, the plurality of partition members 55 are arranged in parallel along the axis P of the cylindrical member 50, that is, along the longitudinal direction with a space between each other. In the illustrated example, seven partition members 55 are provided.

  A through-hole 63 is provided in the main body 61. The mesh part 62 is attached to the main body part 61 so as to close the through hole 63. The mesh part 62 is formed in a mesh shape and allows gas and shavings to pass therethrough and restricts passage of the magnetic abrasive grains 65.

  The plurality of partition members 55 described above partition the space in the cylindrical member 50, that is, the storage tank 9 along the axial center of the cylindrical member 50, that is, the storage tank 9, that is, the axis P of the workpiece 2. In addition, the shaft core P forms both the shaft core of the storage tank 9 and the shaft core of the hollow holding member 32, and the longitudinal direction of the storage tank 9. That is, the axis P and the longitudinal direction of the storage tank 9 are parallel to each other. Furthermore, both the main body portion 61 and the mesh portion 62 described above, that is, the partition member 55 are made of a nonmagnetic material.

  The pair of sealing plates 56 are formed in an annular shape. In addition, the sealing plate 56 is formed in a mesh shape, allows gas and shavings to pass, and restricts passage of the magnetic abrasive grains 65. One sealing plate 56 is attached to the partition member 55 closest to the one end 9a, and the other sealing plate 56 is attached to the partition member 55 closest to the other end 9b. The sealing plate 56 passes the caps 64 (described later) attached to both ends of the workpiece 2 inside. The sealing plate 56 restricts the passage of the magnetic abrasive grains 65 positioned between the partition members 55, and restricts the magnetic abrasive grains 65 from flowing out of the cylindrical member 50, that is, the storage tank 9.

  The storage tank 9 having the above-described configuration stores abrasive grains (hereinafter, referred to as magnetic abrasive grains) 65 made of a magnetic material between the plurality of partition members 55 and is attached to the hollow holding member 32. 2 is accommodated in the cylindrical member 50. That is, the storage tank 9 stores both the workpiece 2 and the magnetic abrasive grains 65. Further, the magnetic abrasive grains 65 collide with the outer surface of the workpiece 2 by rotating (moving) the outer periphery of the workpiece 2 by the rotating magnetic field described above. The magnetic abrasive grains 65 collide with the outer surface of the workpiece 2, scrape a part of the workpiece 2 from the outer surface of the workpiece 2, and roughen the outer surface of the workpiece 2. . In the illustrated example, the size of the magnetic abrasive grains 65 is about 0.8 mm to 1.0 mm × 0.5 mm to 1.0 mm.

  As shown in FIG. 2, the collection unit 10 includes a gas inflow pipe 66, a gas discharge hole 67, a mesh member 68, a gas discharge duct 69, and a dust collector 70 (shown in FIG. 1). . The gas inflow pipe 66 is provided closer to the end of the cylindrical member 50, that is, the storage tank 9 (moving holding portion 6) than the other shaving sealing holder 52, and opens to the inside of the cylindrical member 50, that is, the storage tank 9. The gas inflow pipe 66 is supplied with pressurized gas or the like from a pressurized gas supply source (not shown). The gas inflow pipe 66 guides the pressurized gas into the cylindrical member 50, that is, the storage tank 9.

  The gas discharge hole 67 penetrates through the cylindrical member 50 and communicates the inside and outside of the storage tank 9, and is closer to the end of the cylindrical member 50, that is, the storage tank 9 than one shaving sealing holder 52 (moving and holding unit). (The side away from 6). The mesh member 68 is attached to the cylindrical member 50 so as to close the gas discharge hole 67. The mesh member 68 allows the shavings and gas to pass therethrough and restricts the magnetic abrasive grains 65 from passing therethrough. The mesh member 68 restricts the magnetic abrasive grains 65 from flowing out of the cylindrical member 50, that is, the outside of the storage tank 9.

  The gas exhaust duct 69 is a pipe and is attached in the vicinity of the gas exhaust hole 67. The gas discharge duct 69 surrounds the outer edge of the gas discharge hole 67. The gas discharge hole 67 and the gas discharge duct 69 guide the gas supplied from the gas inflow pipe 66 into the cylindrical member 50, that is, the storage tank 9, to the outside of the cylindrical member 50, that is, the storage tank 9.

  The dust collector 70 is connected to the gas discharge duct 69 and sucks the gas in the gas discharge duct 69. The dust collector 70 sucks the gas in the gas discharge duct 69 to suck the gas in the cylindrical member 50, that is, the storage tank 9 together with the above-described shavings. The dust collector 70 collects shavings. The recovery unit 10 described above supplies gas into the cylindrical member 50, that is, the storage tank 9 through the gas inflow pipe 66, and the gas and dust collector 70 pass the gas through the gas exhaust hole 67 and the gas exhaust duct 69 to remove the shavings into the cylindrical member. 50, that is, the outside of the storage tank 9. Then, the collection unit 10 collects shavings in the dust collector 70.

  As shown in FIG. 1, the cooling unit 11 includes a cooling fan 71 and a cooling duct 72. The cooling fan 71 supplies the pressurized gas to the cooling duct 72. The cooling duct 72 is a pipe. The cooling duct 72 guides the pressurized gas supplied from the cooling fan 71 to the electromagnetic coil 8. The cooling duct 72 blows the pressurized gas supplied from the cooling fan 71 to the electromagnetic coil 8. The cooling unit 11 cools the electromagnetic coil 8 by blowing a pressurized gas onto the electromagnetic coil 8.

  Next, the process of processing (roughening) the outer surface of the workpiece 2 using the surface treatment apparatus 1 having the above-described configuration will be described below.

  First, the cylindrical cap 64 is fitted to the outer periphery of both ends of the longitudinal direction of the workpiece 2. Then, the other positioning member 54 described above is fitted to the outer periphery of the hollow holding member 32. Then, the hollow holding member 32 is passed through the workpiece 2 having caps 64 attached to both ends. Thereafter, the one positioning member 54 described above is fitted to the outer periphery of the hollow holding member 32. Then, the chuck shaft 39 of the chuck cylinder 34 is reduced, and the workpiece 2 is fixed to the hollow holding member 32. At this time, the hollow holding member 32 and the workpiece 2 are coaxial. In this way, the workpiece 2 is attached to the hollow holding member 32.

  Then, the workpiece 2 and the hollow holding member 32 are accommodated in the accommodating tank 9, and the magnetic abrasive grains 65 are supplied into the cylindrical member 50 of the accommodating tank 9. Thus, the magnetic abrasive grains 65 and the workpiece 2 are stored in the storage tank 9. Further, the storage tank 9 is chucked by the holding chucks 28 and 43. In this way, the workpiece 2 and the storage tank 9 are attached to the movable holding unit 6. Then, the cylindrical member 50, the hollow holding member 32, the workpiece 2 and the like of the storage tank 9 become coaxial.

  Of course, the above-described operation is performed while adjusting the position of the moving base 26 with the actuators 24 and 25. Furthermore, the above-described operation is, of course, performed while adjusting the position of the holding base 41. The holding chuck 16 causes the one end 9a of the storage tank 9 to be chucked, for example, so that the fixed holding section 4 holds the one end 9a of the storage tank 9.

  And while supplying gas in the storage tank 9 through the gas inflow pipe 66 of the collection | recovery part 10, while attracting | sucking the gas in the storage tank 9 with the dust collector 70, the gas pressurized by the cooling part 11 is made into the electromagnetic coil 8. Let spray.

  Then, the workpiece 2 is rotated around the axis P together with the hollow holding member 32 by the driving motor 33. Thereafter, electric power from the three-phase AC power supply 48 is applied to the electromagnetic coil 8 to generate a rotating magnetic field in the electromagnetic coil 8. Then, the magnetic abrasive grains 65 located inside the electromagnetic coil 8 revolve (rotate or move) around the axis P while rotating, and the magnetic abrasive grains 65 collide with the outer surface of the workpiece 2, The outer surface of the workpiece 2 is roughened.

  And the electromagnetic coil moving part 5 moves the electromagnetic coil 8 along the axial core P suitably. Then, the magnetic abrasive grains 65 that have entered the inside of the electromagnetic coil 8 move (spin and revolve) by the rotating magnetic field described above, and the magnetic abrasive grains 65 that have escaped from the inside of the electromagnetic coil 8 stop. Further, since the partition member 55 partitions the space in the storage tank 9, the magnetic abrasive grains 65 are restricted from moving beyond the partition member 55, and the magnetic abrasive grains 65 that have escaped from the inside of the electromagnetic coil 8 are described above. Will escape from the rotating magnetic field. Further, when the electromagnetic coil moving unit 5 reciprocates the electromagnetic coil 8 a predetermined number of times along the arrow X, the roughening of the outer surface of the workpiece 2 is completed.

  When the above-described roughening of the outer surface of the workpiece 2 is finished, the application of power to the electromagnetic coil 8 is stopped and the drive motor 33 is stopped. Further, the recovery unit 10 and the cooling unit 11 are stopped. Then, the holding tank 16 of the holding chuck 16 of the fixed holding unit 4 is released from holding, and the holding chuck 43 of the moving chuck unit 7 and the holding chuck 28 of the moving holding unit 6 hold the holding tank 9 while holding the holding tank 9. The moving base 26 is separated from the fixed holding portion 4 along the arrow X by the actuator 24. Then, the storage tank 9 is separated from the fixed holding part 4. Then, the processing target object 2 whose outer surface has been roughened is taken out from the storage tank 9, and the new processing target object 2 is stored in the storage tank 9. In this way, the outer surface of the workpiece 2 is roughened.

  According to this embodiment, when the electromagnetic coil 8 moves, the workpiece 2 is processed, and at the same time, the magnetic abrasive grains 65 are suddenly removed from the rotating magnetic field. For this reason, the strength of the magnetic field acting on the magnetic abrasive grains 65 is abruptly changed (decreased), and the magnetic domains aligned in the magnetic abrasive grains become uneven, thereby weakening the magnetization and processing the workpiece 2. At the same time, the effect of removing the residual magnetization of the magnetic abrasive grains 65 is achieved.

  As a result, a degaussing device or the like that removes the residual magnetization of the magnetic abrasive grains 65 that is separate from the surface treatment device 1 becomes unnecessary. Therefore, it is possible to easily demagnetize the magnetic abrasive grains 65, and it is possible to continuously process the workpiece 2 for a long time, thereby improving the processing efficiency of the surface treatment. Therefore, it is possible to obtain the surface treatment apparatus 1 as a mass production apparatus on the premise of mass production of the workpiece 2.

  Since the workpiece 2 is held at the center of the storage tank 9, the magnetic abrasive grains 65 can collide with the outer surface of the workpiece 2 almost uniformly. Therefore, the outer surface of the workpiece 2 can be processed uniformly.

  By moving (revolving) the magnetic abrasive grains 65 on the outer periphery of the workpiece 2, the magnetic abrasive grains 65 can be reliably collided with the outer surface of the workpiece 2, and the machining of the workpiece 2 is ensured. Can be done.

  Since the workpiece 2 is rotated, the magnetic abrasive grains 65 can be uniformly collided with the outer surface of the workpiece 2 and the outer surface of the workpiece 2 can be processed more uniformly.

  Since the electromagnetic coil 8 is shorter than the storage tank 9, it is possible to increase the rotating magnetic field and cause the electromagnetic coil 8 to be generated in the storage tank 9 as compared with the case where the electromagnetic coil 8 uses a surface treatment apparatus having a length substantially the same as the storage tank 9. Loss of rotating magnetic field can be reduced. Therefore, it is possible to improve the processing efficiency of the processing object 2 and further reduce power consumption.

  Moreover, since the electromagnetic coil 8 is shorter than the storage tank 9, both ends of the storage tank 9 can be supported. Thereby, it is possible to prevent the storage tank 9 from vibrating (moving) due to the movement of the magnetic abrasive grains 65 and the like, and the magnetic abrasive grains 65 can collide more uniformly with the outer surface of the workpiece 2. The outer surface of the object 2 can be processed more uniformly.

  When the inverter 49 arbitrarily changes the strength of the rotating magnetic field (for example, gradually increasing or decreasing the rotating magnetic field), the outer surface of the workpiece 2 is made uniform in the circumferential direction and the longitudinal direction. It can be processed so that

  Since the storage tank 9 is cylindrical, the storage tank 9 does not hinder the circumferential behavior of the magnetic abrasive grains 65 when a rotating magnetic field is applied to the magnetic abrasive grains 65. Therefore, stable processing is possible.

  The partition member 55 partitions the space in the storage tank 9 in the longitudinal direction. For this reason, the partition member 55 limits the area (rotation / revolution area) in which the magnetic abrasive grains 65 can move, thereby enabling more efficient processing.

  Further, since the magnetic abrasive grains 65 can be restricted from moving beyond the partition member 55, the magnetic abrasive grains 65 and the rotating magnetic field can be reliably moved relative to each other, and the magnetic abrasive grains 65 can be reliably demagnetized. it can.

  Since the partition member 55 is not magnetized because it is made of a non-magnetic material, the partition member 55 interferes with the behavior of the magnetic abrasive grains 65, or shavings or the like are magnetized and stick to the partition member 55. Absent. For this reason, it becomes possible to process stably.

  Since a plurality of partition members 55 are provided, it is possible to divide the range where the outer surface of the workpiece 2 is roughened. For this reason, the partition member 55 surely limits the region (rotation / revolution region) in which the magnetic abrasive grains 65 can move, thereby enabling more efficient processing.

  Further, since the magnetic abrasive grains 65 can be restricted from moving beyond the partition member 55, the magnetic abrasive grains 65 can be reliably demagnetized.

  Since the outer wall of the cylindrical member 50 of the storage tank 9 has a single structure, the distance from the electromagnetic coil 8 to the workpiece 2 can be shortened, and the rotating magnetic field generated by the electromagnetic coil 8 can be processed more efficiently. Can be used.

  The sealing plate 56 makes it possible to prevent the magnetic abrasive grains 65 from flowing out of the storage tank 9, improving workability and productivity during processing, and the effect is further enhanced by continuous processing. The processing device 1 can produce (process) the workpiece 2 as a mass production device on the premise of mass production.

  Next, a second embodiment of the present invention will be described with reference to FIG. Note that the same parts as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, as shown in FIG. 3, the surface treatment apparatus 1 includes a driven shaft 73 that rotates with the hollow holding member 32 and supports one end 32 a as a free end of the hollow holding member 32. . The driven shaft 73 is formed in a cylindrical shape and is rotatably supported by the flange member 51d described above by a bearing 74. The driven shaft 73 is arranged coaxially with the cylindrical member 50 of the storage tank 9. Further, one shaving sealing plate 53 is formed in an annular shape and passes through the driven shaft 73 inside. In the present embodiment, the hollow holding member 32 is fixed to the storage tank 9 in a state where the hollow holding member 32 is pressed against the end surface of the driven shaft 73.

  Thus, in this embodiment, since the electromagnetic coil 8 is shorter than the storage tank 9, the hollow holding member 32 in the storage tank 9, that is, the workpiece 2 can be supported at both ends by the driven shaft 73 or the like. The storage tank 9 can be prevented from vibrating (moving) due to the movement of the magnetic abrasive grains 65, etc., and the magnetic abrasive grains 65 can collide more uniformly with the outer surface of the workpiece 2. The outer surface can be processed even more uniformly.

  Next, the inventors of the present invention confirmed the effect of the surface treatment apparatus 1 of the above-described embodiment. The results are shown in Table 1.

(Comparative Example 1)
Comparative Example 1 in Table 1 shows the effect of demagnetizing magnetic abrasive grains using a dedicated demagnetizing device applied in a pulsed manner.

(Comparative Example 2)
Comparative Example 2 in Table 1 shows the strength of the rotating magnetic field (processing efficiency) generated by a conventional surface treatment apparatus having an electromagnetic coil having a length substantially equal to that of the storage tank, and a dedicated demagnetizer that moves the storage tank. This shows the effect when demagnetizing the magnetic abrasive grains.

(Invention product)
The product of the present invention has the effect of performing demagnetization of the magnetic abrasive grains 65 using the strength (rotation efficiency) of the rotating magnetic field generated by the surface treatment apparatus 1 described in the embodiment described above. Show.

  The generated magnetic field indicates that the strength of the rotating magnetic field is the same as that of Comparative Example 2, and the generated magnetic field indicates that the strength of the rotating magnetic field is 20% higher than that of Comparative Example 2. The demagnetization effect of ◯ indicates the same demagnetization effect as in Comparative Examples 1 and 2.

  According to Table 1, regarding the demagnetizing effect, since it was ◯ in any case, it became clear that the demagnetization of the magnetic abrasive grains 65 can be reliably performed. Therefore, it became clear that the product of the present invention is suitable for continuous production (processing) of the workpiece 2.

  Regarding the generated magnetic field, since Comparative Example 1 shows a dedicated demagnetizer, it is-, and in Comparative Example 2, it is ◯, whereas the product of the present invention is ◎, so that the product of the present invention is Comparative Example 1. It was revealed that the rotating magnetic field can be made stronger than 2 and 2, and the roughening processing efficiency is high. Thus, according to Table 1, it is clear that the product of the present invention can surely demagnetize the magnetic abrasive grains 65 without using a dedicated demagnetizing device and can increase the processing efficiency of the roughening. It became.

  Furthermore, the inventors of the present invention measured the deviation between the axial centers of the electromagnetic coil 8 and the hollow holding member 32 of the surface treatment apparatus 1 of the first and second embodiments described above. The results are shown in Table 2.

  The product 1 of the present invention in Table 2 is the surface treatment apparatus 1 shown in the first embodiment described above. The shaft core and the electromagnetic coil 8 at one end 32a of the hollow holding member 32 of the surface treatment apparatus 1 are shown. The average value of the positional deviation between the axial center of the hollow holding member 32 and the positional deviation between the axial center of the hollow holding member 32 and the axial core of the electromagnetic coil 8 is shown.

  The product 2 of the present invention in Table 2 is the surface treatment apparatus 1 shown in the second embodiment described above. The shaft core and the electromagnetic coil 8 at one end 32a of the hollow holding member 32 of the surface treatment apparatus 1 are shown. The average value of the positional deviation between the axial center of the hollow holding member 32 and the positional deviation between the axial center of the hollow holding member 32 and the axial core of the electromagnetic coil 8 is shown.

  According to Table 2, the surface treatment apparatus 1 shown in the second embodiment can keep the electromagnetic coil 8 and the hollow holding member 32 coaxial with the surface treatment apparatus 1 shown in the first embodiment. Became clear. That is, it is clear that the surface treatment apparatus 1 shown in the second embodiment can roughen the outer surface of the workpiece 2 more uniformly than the surface treatment apparatus 1 shown in the first embodiment. It became.

  In the above-described embodiment, it goes without saying that the outer diameter of the workpiece 2, the size of the magnetic abrasive grains 65, and the outer diameter of the cylindrical member 50 of the storage tank 9 may be appropriately changed. In addition, regarding the shapes of both ends of the workpiece 2, the rough surface roughness, the processing time (processing conditions), the number of reciprocations of the electromagnetic coil 8, and the magnetism are also targeted, such as the radius of curvature of chamfering and the size of the chamfered shape. It is desirable to select an appropriate shape from the durability of the abrasive grains 65. The total amount of the magnetic abrasive grains 65 accommodated in the accommodating tank 9 is also appropriate from the target roughness of the rough surface, the processing time (processing conditions), the number of reciprocations of the electromagnetic coil 8, and the durability of the magnetic abrasive grains 65. It is desirable that the amount be determined in a proper amount.

  In the embodiment described above, the partition member 55 is provided. However, in the present invention, due to the mass of the magnetic abrasive grains 65 and the strength of the rotating magnetic field generated by the electromagnetic coil 8, the magnetic abrasive grains 65 are not attracted to the rotating magnetic field, and the magnetic abrasive is moved by the electromagnetic coil 8. As long as the grains 65 escape from the rotating magnetic field, the partition member 55 need not be provided. Furthermore, in the present invention, the sealing plate 56 may be provided at at least one end of the cylindrical member 50 of the storage tank 9. In the present invention, the outer surface of the workpiece 2 having various shapes other than a cylindrical shape such as a plate shape may be roughened.

  The present invention is not limited to the above embodiment. That is, various modifications can be made without departing from the scope of the present invention. That is, the holding unit, the rotating unit, and the magnetic field changing unit are not limited to the configurations and arrangements described in the embodiments, and may be various configurations and arrangements.

1 is a perspective view showing a schematic configuration of a surface treatment apparatus according to a first embodiment of the present invention. It is sectional drawing which follows the II-II line | wire in FIG. It is sectional drawing which shows the principal part of the surface treatment apparatus concerning the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surface treatment apparatus 2 Processing object 5 Electromagnetic coil moving part (moving means)
8 Electromagnetic coil (magnetic field generator)
9 Storage tank 33 Motor for driving (rotating means)
34 Chuck cylinder (holding means)
40 Chuck claw (holding means)
49 Inverter (magnetic field changing means)
55 Partition member (partition means)
56 Sealing plate 65 Magnetic abrasive grain P Shaft core (longitudinal direction of storage tank)

Claims (10)

A storage tank formed in a cylindrical shape for storing a workpiece and magnetic abrasive grains;
In a surface treatment apparatus comprising a magnetic field generator for generating a rotating magnetic field for moving the magnetic abrasive grains in the storage tank and causing the magnetic abrasive grains to collide with the workpiece by the rotating magnetic field,
Moving means for moving the magnetic field generator along the longitudinal direction of the storage tank ;
A surface treatment apparatus comprising: partitioning means for partitioning a space in the storage tank along a longitudinal direction of the storage tank .   The surface treatment apparatus according to claim 1, further comprising holding means for holding the object to be processed at the center of the storage tank.   The surface treatment apparatus according to claim 2, wherein the magnetic field generator moves the magnetic abrasive grains on the outer periphery of the workpiece.   The surface treatment apparatus according to claim 3, further comprising a rotating unit that rotates the object to be processed around an axis parallel to a longitudinal direction of the storage tank.   5. The surface treatment according to claim 1, wherein a total length of the magnetic field generation unit in the axial direction is shorter than a total length of the storage tank in the longitudinal direction. apparatus.   The surface treatment apparatus according to claim 1, further comprising a magnetic field changing unit that changes the strength of the magnetic field generated by the magnetic field generation unit. The surface treatment apparatus according to claim 1 , wherein the partition unit is made of a nonmagnetic material. 8. The surface treatment apparatus according to claim 1 , wherein a plurality of the partitioning units are arranged in parallel along the longitudinal direction of the storage tank at intervals. . The surface treatment apparatus according to any one of claims 1 to 8 , wherein an outer wall of the storage tank is formed in a single structure. The said storage tank provided the sealing board which controls the outflow of the said magnetic abrasive grain to the exterior at least one end of the longitudinal direction, The Claim 1 thru | or 9 characterized by the above-mentioned. Surface treatment equipment.

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