WO2001007206A1 - Procede de traitement de surface et dispositif utilisant un outil d'anisotropie magnetique - Google Patents

Procede de traitement de surface et dispositif utilisant un outil d'anisotropie magnetique

Info

Publication number
WO2001007206A1
WO2001007206A1 PCT/JP2000/004592 JP0004592W WO0107206A1 WO 2001007206 A1 WO2001007206 A1 WO 2001007206A1 JP 0004592 W JP0004592 W JP 0004592W WO 0107206 A1 WO0107206 A1 WO 0107206A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
work
tool
surface treatment
magnetic field
Prior art date
Application number
PCT/JP2000/004592
Other languages
English (en)
Japanese (ja)
Inventor
Takeo Shinmura
Hitomi Yamaguchi
Original Assignee
Japan Science And Technology Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP21160999A external-priority patent/JP2000107996A/ja
Application filed by Japan Science And Technology Corporation filed Critical Japan Science And Technology Corporation
Publication of WO2001007206A1 publication Critical patent/WO2001007206A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
    • B24B31/112—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using magnetically consolidated grinding powder, moved relatively to the workpiece under the influence of pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/40—Single-purpose machines or devices for grinding tubes internally

Definitions

  • the present invention relates to clean pipes (stainless steel), clean pipes for transporting food such as beer and milk, and various types of ceramic pipes in the semiconductor manufacturing industry, the nuclear power related industry, and chemical component analyzers, and also bent pipes.
  • the present invention relates to a magnetic polishing method and apparatus for precisely mirror-finishing the inner surface of a non-magnetic material such as a container having a narrow entrance and a conventional processing tool cannot be inserted therein, such as a pipe having a complicated shape or a fine diameter, such as a clean gas cylinder. You.
  • the magnetic polishing method and apparatus of the present invention precisely mirror-finish the inner surface of a non-magnetic work, but can also be applied to processing of the outer surface of a non-magnetic work. Background art
  • Fig. 17 shows the principle of polishing the inner surface of a workpiece such as a pipe in the magnetic polishing method.
  • Fig. 17 (A) shows the arrangement of permanent magnets, pipes, and magnetic abrasive grains.
  • B) is a two-dimensional schematic diagram of the magnetic high-speed rotation method that performs magnetic polishing of the inner surface of a long and slender pipe, and shows the magnetic field distribution by the finite element method magnetic field analysis.
  • abrasive grain 5 (a mixture of a relatively large-diameter iron powder and a small-diameter magnetic abrasive grain) is disposed on the inner surface of a workpiece 4 such as a pipe, which is a polishing particle, and is disposed in a magnetic field formed between the magnetic poles. In this configuration, the mark 4 and the magnetic field are relatively rotated.
  • the magnetic field that is, the plurality of magnetic pole sides 2 S and 2 N connected by the yoke 3 are rotated with respect to the stationary work 4, and
  • the inner surface of the work 4 is precisely mirror-finished by the polishing pressure on the inner surface of the work 4 generated by the centrifugal force of the magnetic abrasive grains 5 generated by the relative rotation.
  • the magnetic abrasive grains 5 serving as an abrasive placed on the inner surface of the work 4 have a spherical basic structure. For this reason, as shown in FIG.
  • the magnetic abrasive grains 5 In order to secure the processing pressure on the inner working surface of 4 and effectively follow the rotating magnetic field of the magnetic abrasive grains 5, the magnetic abrasive grains 5 must be directed in the direction of rotation of the inner working surface of the workpiece 4. It was necessary to form an inhomogeneous magnetic field.
  • the formation of the inhomogeneous magnetic field depends on the size and shape of the magnetic poles and their arrangement, but it has been very difficult to find the optimum value.
  • the magnetic force F acting on the magnetic particles is generally expressed by the following formula (basic formula of magnetic force).
  • the magnetic force acting on a particle increases in proportion to the cube of the particle diameter, in proportion to the magnetic susceptibility of the particle, and increases in proportion to the product of the magnetic field intensity ⁇ and its rate of change. When the rate of change is zero, the magnetic force is also zero.
  • the diameter of a work 4 such as a pipe becomes extremely small (a pipe diameter of 1 O mm or less).
  • the four magnets cause shape interference, and it is very difficult to form an inhomogeneous magnetic field by a magnetic pole arrangement as shown in FIG. 17 (B). Therefore, it has become necessary to employ a uniform uniform magnetic field distribution in which a pair of S and N poles face each other as shown in Fig. 18, and the magnetic particles rotate further following the rotating magnetic poles. It's getting harder.
  • the present invention provides a magnetic anisotropy that enables the magnetic particles to easily rotate following the rotating magnetic pole even when the magnetic field is uniform, thereby polishing and work hardening the work surface.
  • An object of the present invention is to provide a surface treatment method using a tool and an apparatus therefor.
  • the present invention provides a method in which magnetic abrasive grains are arranged on the inner surface of a work such as a pipe made of a non-magnetic material such as ceramics or stainless steel arranged in a magnetic field, and the work and the magnetic field are relatively rotated.
  • the present invention also provides a method of disposing magnetic particles having magnetic anisotropy on the inner surface of a work such as a pipe made of a non-magnetic material such as ceramics or stainless steel arranged in a magnetic field,
  • the structure is such that the inner surface of the work is polished by relative rotation of and.
  • the present invention is characterized in that a magnetic pin tool having a predetermined diameter and a predetermined length is used as the magnetic particles having a shape having magnetic anisotropy.
  • the magnetic field is a uniform magnetic field.
  • the present invention provides a method in which magnetic abrasive grains are arranged on the inner surface of a work such as a pipe made of a non-magnetic material such as ceramics or stainless steel arranged between a plurality of magnetic poles connected by a yoke, and the work and a magnetic field are formed.
  • a magnetic polishing apparatus configured to rotate relatively, magnetic particles having a shape having magnetic anisotropy are mixed into an inner surface of a work such as a pipe in addition to the magnetic abrasive grains. .
  • magnetic particles having a shape having magnetic anisotropy are arranged on the inner surface of a workpiece such as a pipe made of a nonmagnetic material such as ceramics or stainless steel arranged between a plurality of magnetic poles connected by a yoke.
  • a workpiece such as a pipe made of a nonmagnetic material such as ceramics or stainless steel arranged between a plurality of magnetic poles connected by a yoke.
  • the work and the magnetic field are relatively rotated to polish the inner surface of the work.
  • the present invention is characterized in that a magnetic pin tool having a predetermined diameter and a predetermined length is used as the magnetic particles having a shape having magnetic anisotropy.
  • the present invention is characterized in that the end face of the magnetic pin tool has a gentle shape such as a spherical surface.
  • the present invention is characterized in that an edge portion is formed on the magnetic pin tool.
  • the present invention is characterized in that the ratio between the diameter and the length of the magnetic pin tool is set so as to be appropriately determined by the inner diameter of the work and the strength of the magnetic field.
  • the relative magnetic permeability of the magnetic pin tool is set to about 2 to 100 when dynamic behavior is desired, and 100 to 1 when stable static behavior due to high working pressure is desired. It is characterized in that it is selected to be around It is.
  • the present invention is characterized in that a plurality of magnetic poles connected to the work by a yoke are rotatable.
  • the present invention is characterized in that the work is rotatable with respect to a plurality of magnetic poles connected by the yoke.
  • the present invention is characterized in that slurry such as magnetic abrasive grains disposed on the inner surface of the work is forcibly circulated by a pump or the like, and these are used as means for solving the problems.
  • FIG. 1 (A) is a conceptual diagram of a surface treatment method using the magnetic anisotropic tool of the present invention
  • FIG. 1 (B) is an enlarged view near a workpiece.
  • FIG. 2 is an overall conceptual diagram of the magnetic polishing apparatus of the present invention.
  • FIG. 3 is a view showing various modifications of the magnetic pin tool of the present invention.
  • FIG. 4 shows a first processing condition according to the surface treatment method using the magnetic anisotropic tool of the present invention, and shows a polishing test based on a difference in particle diameter of magnetic abrasive grains mixed with the magnetic pin.
  • Fig. 5 is a diagram showing the surface roughness shape as a result of the processing.
  • FIG. 6 shows a second processing condition by the surface treatment method using the magnetic anisotropic tool of the present invention, and shows a polishing test by a difference in diameter of the magnetic pin tool. . 2 mm.
  • A shows the state of surface roughness before processing
  • B shows the state of surface roughness after processing time of 60 minutes.
  • FIG. 7 shows a second processing condition by the surface treatment method using the magnetic anisotropic tool of the present invention, and shows a polishing test by a difference in diameter of the magnetic pin tool. Or 0.5 mm.
  • the graph shows the surface roughness shape before and after processing.
  • FIG. 8 shows a second processing condition by the surface treatment method using the magnetic anisotropic tool of the present invention, and shows a polishing test by a diameter difference of the magnetic pin tool. Therefore, the diameter of the magnetic pin tool is 2.0 mm.
  • the graph shows the surface roughness before and after processing.
  • FIG. 9 is a diagram showing third processing conditions using a ceramic pipe, which is a non-magnetic material, as a workpiece by the surface treatment method using the magnetic anisotropic tool of the present invention.
  • FIG. 10 is a view showing the surface roughness shape as a result of the processing.
  • FIG. 11 shows a second embodiment of the surface treatment method using the magnetic anisotropic tool of the present invention, and is a conceptual diagram thereof.
  • Fig. 12 shows a second embodiment of the surface treatment method using the magnetic anisotropic tool of the present invention. The experimental results of the surface roughness of the magnetic anisotropic tool according to the dimensional shape and supply amount are shown.
  • FIG. FIG. 13 shows a second embodiment of the surface treatment method using the magnetic anisotropic tool of the present invention, and shows an experimental result of the machining amount depending on the dimensions and shape of the magnetic anisotropic tool and the supply amount.
  • FIG. FIG. 14 shows a second embodiment of the surface treatment method using the magnetic anisotropy tool of the present invention, and is a view showing an experimental result of surface roughness due to a change in a magnetic field.
  • FIG. 15 shows a second embodiment of the surface treatment method using the magnetic anisotropic tool of the present invention, and is a view showing an experimental result of a machining amount due to a change in a magnetic field.
  • FIG. 16 shows a second embodiment of the surface treatment method using the magnetically anisotropic tool of the present invention, and is a view showing an experimental result of a work hardening effect on a surface.
  • Figure 17 is a conceptual diagram of a conventional magnetic polishing method.
  • Figure 18 is a conceptual diagram of the magnetic polishing method in a uniform uniform magnetic field distribution. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 (A) is a conceptual diagram of a surface treatment method using the magnetic anisotropic tool of the present invention
  • FIG. 1 (B) is an enlarged view near a workpiece.
  • FIG. 2 is an overall conceptual diagram of the magnetic polishing apparatus of the present invention.
  • FIG. 3 is a view showing various modifications of the magnetic pin tool of the present invention.
  • FIGS. 4 to 10 show the results of using the magnetic anisotropic tool of the present invention. It is a figure showing the processing result by the surface treatment method.
  • a magnetic field by a uniform magnetic field is formed by a plurality of (two in the example shown) connected by a yoke 3. It does not hinder the magnetic field configuration due to the non-uniform magnetic field as in 17. 7.)
  • Rare-earth permanent magnets 1 S, i N The magnetic poles placed opposite each other, 2 S, 2 N, ceramics, stainless steel, etc.
  • a magnetic abrasive grain 5 such as iron powder is arranged on the inner surface of a pipe-like work 4 made of a non-magnetic material, and magnetic particles 6 having a shape having magnetic anisotropy are added to the magnetic abrasive grain 5 in addition to the pipe-like work.
  • the work 4 and the magnetic field are rotated relative to each other by being mixed into the inner surface of the work 4.
  • the work 4 may be rotated while the magnetic field side is stationary, but in the present embodiment, the work 4 is stationary and the magnetic poles 2 S and 2 N including the yoke are rotated. It is.
  • the magnetic particles 6 follow the rotating magnetic pole during the relative rotation between the workpiece 4 and the magnetic field.
  • a magnetic pin tool having a predetermined diameter and a predetermined length is used as the magnetic particles 6 having a shape having magnetic anisotropy, which enables the surface of the work to be easily polished and polished. is there.
  • the magnetic particles 6, any shape other than a magnetic pin tool having a predetermined diameter and a predetermined length can be adopted as long as the shape has magnetic anisotropy. As shown enlarged in FIG.
  • the ratio between the diameter and the length of the magnetic pin tool 6 mixed into the inner surface of the work 4 in addition to the magnetic abrasive grains 5 is determined by a test result described later. It can be determined appropriately depending on the inner diameter of the work 4 and the strength of the magnetic field.
  • the relative magnetic permeability of the magnetic pin tool 6 is preferably set to about 2 to 100 when dynamic behavior is desired, and 10 to obtain stable static behavior due to high processing pressure. It is selected to be about 0 to 1000.
  • the magnetic pin tool 6 having a predetermined diameter and a predetermined length configured in a shape having magnetic anisotropy follows the rotating magnetic pole by overcoming the polishing resistance.
  • the work surface can be polished using the magnetic abrasive grains 5 as an abrasive.
  • the example shown in Fig. 1 (B) is for obtaining a stable static behavior due to a high working pressure, with the relative magnetic permeability of the magnetic pin tool 6 selected to be about 100 to 100,000.
  • the magnetic pin tool 6 that mainly grinds the work surface using the magnetic abrasive grains 5 as an abrasive material.
  • the magnetic permeability to be about 2 to 100, it is possible to obtain a behavior in which various portions of the magnetic pin tool 6 polish the work surface using the magnetic abrasive grains 5 as a polishing material.
  • FIG. 3 shows various modifications of the magnetic pin tool 6.
  • FIG. 3 (A) shows the most typical pin tool shape
  • FIGS. 3 (B) to (D) show the magnetic pin tools. Sharp edge cutting edges are formed on both end surfaces of the workpiece, and are used when roughing the inner surface of the work.
  • Fig. 3 (E) shows the end surface of a magnetic pin tool with a gentle shape such as a spherical surface, which is used for precision finishing.
  • Figs. 3 (F) to (I) show the case where the outer peripheral part other than the end face is also used when the relative magnetic permeability is selected to be about 2 to 100 and the dynamic behavior of the magnetic pin tool 6 is to be obtained.
  • Various types of edge portions are formed on the outer peripheral portion.
  • Fig. 3 (J) shows the relative magnetic permeability of about 2 to 100, the dynamic behavior is obtained, and the outer peripheral part other than the end face is used for precision finishing when used for polishing.
  • the entire magnetic pin tool 6 is formed in a spiral shape.
  • FIG. 2 is an overall conceptual diagram of a magnetic polishing apparatus according to the present invention, in which a magnetic pin tool 6 that rotates by overcoming grinding resistance following the rotating magnetic poles 2 S and 2 N on the inner surface of a work 4 such as a stationary pipe.
  • Slurry such as mixed magnetic abrasive grains 5 (including liquid such as light oil) 8 is forcibly circulated by pump 7 etc. It is configured to be looped.
  • FIGS. 4 to 10 show the results of processing tests using the magnetic polishing method and the apparatus according to the present invention.
  • FIG. 4 is a table showing the first processing conditions
  • FIG. 5 is a view showing the surface roughness shape as a result of the processing.
  • the difference in the polishing process due to the difference in the diameter of the magnetic abrasive grains mixed with the magnetic pins was tested.
  • the processing conditions were a non-magnetic material as the work.
  • SUS 304 stainless steel Magnetic abrasive grains based on light oil with a circular pipe inner diameter of 9 mm, magnetic pole rotation speed of 900 rpm, and a concentration of 7.5% by weight WA # 400 (average particle diameter of 40 m) or WA Slurry mixed with # 400 (average particle size of 7 urn) was flowed at a flow rate of 5m1Zs, and the magnetic pin was made of SUS304 magnetic stainless steel (with a little iron content) 0.5mm in diameter, long It was supplied with 1 g of a 5 mm magnetic pin tool.
  • Figures 5 (A) and (B) show the test results after 30 minutes of polishing when the magnetic abrasive grains in the slurry were WA # 400 (average grain diameter 40 / im). Looking at the shape, it can be seen that the smoothing of the inner surface of the work is somewhat advanced.
  • FIGS. 6 to 8 are tables showing the second processing conditions and diagrams showing the surface roughness shapes as a result of the processing.
  • polishing force and the processing area of the pin tip are optimized by the appropriate diameter of the magnetic pin tool, and good smoothing proceeds, and the pin diameter is too large with respect to the workpiece inner diameter. If too long, it may not be suitable for polishing the inner surface of the work.
  • Ra is a value represented by the center line average roughness (average of the integrated value of the roughness in a predetermined range).
  • FIGS. 9 and 10 are a table showing the third processing conditions and a diagram showing the surface roughness shape as a result of the processing.
  • the processing conditions were as follows: the inner diameter of the Si 3 N 4 ceramic pipe was 20 mm (outer diameter 30 mm), the length was 70 mm, and the number of rotations of the work was 20. 0 rpm, 5% by weight of straight oil as lubricating oil, and a workpiece feed of 1 OmmZ
  • the surface roughness was checked every 10 minutes, 20 minutes, and 30 minutes after the polishing.
  • Figure 9 (B) shows the surface roughness of the inner surface of the ceramic pipe before polishing.
  • Figure 10 (A) shows the processing results of chromium oxide abrasive grains and diamond abrasive grains every 10 minutes
  • Figure 10 (B) shows the surface roughness of each abrasive grain after 30 minutes.
  • the smoothness has progressed sufficiently compared to the roughness before processing of 0.42 mRa, and the chromium oxide abrasive has a roughness of 0.02 mRa and the diamond abrasive has a roughness of 0.04 mRa.
  • the result was obtained. It is found that the processing with diamond abrasive grains is based on micro-machining, and that the processing with chromium oxide abrasive grains is based on a mechanochemical polishing mechanism utilizing a chemical reaction.
  • the magnetic force acting on the conventionally used amorphous iron powder is determined by the above equation (1) in proportion to the product of the magnetic field strength and its rate of change.
  • a processing environment non-uniform magnetic field distribution environment
  • a large magnetic field gradient cjH / ⁇ ⁇ ⁇
  • the machining environment becomes low with a low magnetic field gradient, which increases the risk of inability to machine, and the applied state becomes unstable.
  • the magnetic field lines should have been acting even in a uniform magnetic field, and the present inventors have found that a new magnetic tool having magnetic anisotropy is used as a tool that can stably work even in a uniform magnetic field. Was made.
  • Equation (2) does not include the rate of change of the magnetic field. In other words, even under a processing environment with a uniform magnetic field, it can be said that the magnetic pins are aligned on the inner surface of the pipe by receiving the aligning force in the direction of the magnetic force, and stable processing can be realized while applying a processing pressure to the inner surface. Furthermore, by selecting the pin diameter and length as in equation (2), it is possible to control the moment magnet force.
  • FIGS. 11 to 16 show a second embodiment of the surface treatment method and apparatus using the magnetic anisotropic tool of the present invention.
  • FIG. 11 shows the surface treatment using the magnetic anisotropic tool.
  • Fig. 12 is a conceptual diagram of the second embodiment of the method
  • Fig. 12 is a diagram showing the experimental results of the surface roughness of the magnetic anisotropic tool and the supply amount
  • Fig. 13 is the dimension of the magnetic anisotropic tool.
  • Fig. 14 shows the experimental results of the surface roughness due to the variation of the magnetic field
  • Fig. 15 shows the experimental results of the processing amount due to the variation of the magnetic field
  • FIG. 16 is a diagram showing experimental results of the work hardening effect on the surface.
  • two electromagnetic coils are arranged to face each other, and a pipe-shaped workpiece in which a magnetic anisotropic tool (magnetic pin tool) is supplied is interposed between them.
  • a magnetic anisotropic tool magnetic pin tool
  • Fig. 12 shows the experimental results of the surface roughness of the magnetic anisotropic tool (magnetic pin) according to the dimensions and the supply amount
  • Fig. 13 shows the results of the dimensions and the supply amount of the magnetic anisotropic tool. Shows the experimental results of the machining amount, 0.50 x 5 mm and ⁇ 1 under the conditions of a frequency of 40 Hz and a pole tube distance of 18 mm. This shows the results of an experiment using two types of magnetic pins of 0 x 5 mm and changing the supply amount. From Fig. 12 and Fig. 13, 01.0 x 5 mm is more accurate It was found that the surface processing and the high processing amount were obtained, and that there was not much difference in the supply amount, and that the processing area would be affected.
  • Fig. 14 shows the experimental results of the surface roughness due to the magnetic field fluctuation
  • Fig. 15 shows the experimental results of the machining amount due to the magnetic field fluctuation.
  • the effects of the magnetic field fluctuation frequency and the distance between the magnetic pole and the circular tube are examined.
  • Fig. 16 shows the experimental results of the work hardening effect on the surface.
  • the surface hardness based on the so-called shot beaning phenomenon when the surface of a workpiece such as a pipe was machined by supplying only a magnetically anisotropic tool.
  • the upper part of the processed product was subjected to a hardness test using the Pickers hardness test. Higher surface hardness was obtained in both the lower and side parts than in the unprocessed product.
  • the shape of the yoke, the shape of the magnetic pole, the related configuration therebetween, and the magnetic abrasive grains disposed on the inner surface of the work Circulation method using a slurry pump, etc. dimensions of magnetic abrasive grains and magnetic pins, rotation drive method of work or magnetic pole, shape and material of work, shape and material of magnetic pin, relative permeability and material, magnetic field
  • the strength, polishing time, etc. can be selected as appropriate.
  • the magnetic anisotropic tool may be a tool composed of two or more different members such as a magnetic material inside the tool and an abrasive material outside.
  • a magnetic field is formed.
  • a variable magnetic field (for example, several hertz to several thousand hertz) is formed by a separate electromagnetic coil to adjust the dynamic behavior characteristics of the magnetic abrasive grains and the magnetic pins as needed to achieve inner surface polishing. You can also.
  • the apparent magnetic anisotropy may be increased by employing an electromagnet instead of a permanent magnet for forming a magnetic field for magnetic polishing and changing the magnitude and direction of the magnetic force every moment. it can.
  • an electromagnet instead of a permanent magnet for forming a magnetic field for magnetic polishing and changing the magnitude and direction of the magnetic force every moment. It can.
  • a combination of high-speed movement of the permanent magnet and application of an alternating current to the electromagnet may be combined.
  • the magnetic anisotropy that enables the magnetic particles to easily rotate and follow the rotating magnetic pole to polish the workpiece surface even in the case of a uniform magnetic field.
  • a surface treatment method using a tool and an apparatus therefor are provided.
  • the magnetic abrasive grains are arranged on the inner surface of a work such as a pipe made of a non-magnetic material such as ceramics or stainless steel arranged in a magnetic field, and the work and the magnetic field are relatively rotated.
  • a magnetic field having a shape having magnetic anisotropy is mixed in addition to the magnetic abrasive grains, so that a uniform magnetic field distribution has to be adopted. Even if the diameter of the workpiece is extremely small, even if the inner surface is precision-finished, the magnetic particles overcome the polishing resistance when the workpiece and the magnetic field rotate relative to each other due to the magnetic anisotropy of the magnetic particles. Grinding with magnetic abrasive grains The polishing process using the abrasive can be effectively performed.
  • magnetic particles having magnetic anisotropy commercially available parts such as magnetic pin tools can be used as they are, and they can be obtained very easily and inexpensively. Since various magnetic pin tools and magnetic particles can be arbitrarily selected, and the adjustment and optimization of the magnetic field strength can be easily performed, a non-magnetic fine-diameter pipe or the like can be used according to the required processing conditions. It is now possible to easily perform ultra-precision polishing of the inner surface of the work. Even when only magnetically anisotropic tools are used as abrasive particles, surface hardness can be improved based on the shot beaning phenomenon, and high precision smoothness and high hardness of the machined surface can be obtained at the same time. Has resulted in.
  • the magnetic particles follow the rotating magnetic pole, and the magnetic particles can be easily rotated to polish the work surface.
  • a surface treatment method using an elastic tool and an apparatus therefor are provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

L'invention concerne un procédé de polissage magnétique au moyen d'une broche magnétique et d'un dispositif associé, qui permet de polir et de durcir la surface d'une pièce, grâce à des particules magnétiques facilement rotatives suivant un pôle magnétique rotatif, même dans un champ magnétique uniforme. Le procédé de polissage magnétique consiste à : déposer des grains abrasifs magnétiques (5) sur la surface interne d'une pièce (4), par exemple, un tuyau fait dans un élément non magnétique tel qu'une céramique ou un acier inoxydable, qui est placé dans un champ magnétique; mettre en rotation la pièce (4) par rapport au champ magnétique afin de polir la surface interne de la pièce (4). Outre des grains abrasifs de surface (5), on utilise des particules magnétiques (outil broche magnétique d'un diamètre et d'une longueur donnés) (6) dont la forme présente une anisotropie magnétique donnée. Selon l'invention, même dans le cas d'un polissage de petit diamètre exigeant un champ magnétique uniforme, les particules magnétiques (5, 6), présentant une certaine anisotropie magnétique, peuvent se mettre en rotation suivant un pôle magnétique rotatif, sans co-rotation avec la pièce (4), ce qui permet un polissage ultra-précis de la surface de la pièce (4).
PCT/JP2000/004592 1999-07-27 2000-07-10 Procede de traitement de surface et dispositif utilisant un outil d'anisotropie magnetique WO2001007206A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP21160999A JP2000107996A (ja) 1998-07-30 1999-07-27 磁気異方性工具を用いた表面処理方法およびその装置
JP11/211609 1999-07-27

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WO2001007206A1 true WO2001007206A1 (fr) 2001-02-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160375538A1 (en) * 2015-06-24 2016-12-29 Rolls-Royce Plc Polishing of complex internal geometries
CN108673329A (zh) * 2018-05-14 2018-10-19 新乡学院 真空式超声磁力清洗研磨抛光机

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JPS63221965A (ja) * 1987-03-06 1988-09-14 Kureha Chem Ind Co Ltd 管材の研磨方法および装置
JPS63260759A (ja) * 1987-04-17 1988-10-27 Kureha Chem Ind Co Ltd 管材の研磨方法および装置
US5044128A (en) * 1990-06-27 1991-09-03 Priority Co., Ltd. Magnetically-polishing machine and process
JPH0691521A (ja) * 1992-09-07 1994-04-05 Kyoei Denko Kk 延長材研磨装置
JPH081506A (ja) * 1994-06-22 1996-01-09 Nisshin Steel Co Ltd パイプ内面の研磨方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63221965A (ja) * 1987-03-06 1988-09-14 Kureha Chem Ind Co Ltd 管材の研磨方法および装置
JPS63260759A (ja) * 1987-04-17 1988-10-27 Kureha Chem Ind Co Ltd 管材の研磨方法および装置
US5044128A (en) * 1990-06-27 1991-09-03 Priority Co., Ltd. Magnetically-polishing machine and process
JPH0691521A (ja) * 1992-09-07 1994-04-05 Kyoei Denko Kk 延長材研磨装置
JPH081506A (ja) * 1994-06-22 1996-01-09 Nisshin Steel Co Ltd パイプ内面の研磨方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160375538A1 (en) * 2015-06-24 2016-12-29 Rolls-Royce Plc Polishing of complex internal geometries
CN108673329A (zh) * 2018-05-14 2018-10-19 新乡学院 真空式超声磁力清洗研磨抛光机

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