JP2010005726A - Grinding member and grinding method for pipe inner surface using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grinding member for completely and easily grinding an inner surface of a pipe at reduced cost, and to provide a method for completely and easily grinding the inner surface of the reducing pipe without breaking the reducing ceramic pipe where small diameter parts are formed on both ends and a large diameter part is formed in the middle. <P>SOLUTION: The grinding member uses a form section formed into a shape to be along an inner surface of the large diameter section of the reducing pipe in advance as a grinding part. When the form section penetrates the small diameter section of the reducing pipe, the form section is in an extended state, and when it reaches the large diameter section, it is returned to a shape to be along the inner surface of the large diameter part. Besides, the grinding method of the reducing pipe inner surface using the member is provided. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a polishing member and a method for polishing an inner surface of a different diameter pipe using the same, and in particular, polishing using a wire material that is previously formed into a shape along the inner surface of a large diameter portion of a different diameter pipe and provided with a polishing portion. The present invention relates to a member and a method for polishing an inner surface of a different diameter pipe using the member.

  In general, ceramics are high purity and excellent in heat resistance, so that they are used in various fields including the semiconductor manufacturing field and the medical field, and ceramic different diameter tubules as shown in FIG. 3 are also used in many cases.

  In the manufacturing process of such a ceramic different diameter thin tube, conventionally, the inner surface polishing of the different diameter thin tube has been performed by pouring abrasive grains into the inside and inserting a buff or brush into the tube.

  However, such a method for polishing the inner surface of the different-diameter narrow tube cannot make the buff or brush strongly contact the processed surface of the large-diameter portion, and cannot be polished sufficiently.

  Further, in the different diameter narrow tube shown in FIG. 5, there is a limit in the length of the polishing tool, or the inner shape of the large diameter portion is difficult due to the complicated shape in the tube.

  In order to polish the inner surface of the irregularly shaped tube, there is a mirror surface processing method in which a core similar to the shape of the inner surface of the tube is inserted into the irregularly shaped tube with a gap, and an elastic medium material containing an abrasive is passed through this gap. It has been proposed (see, for example, Patent Document 1).

  Further, an abrasive material containing a magnetic material is arranged on the inner surface of a thin tube made of a non-magnetic material, and the abrasive material is vibrated while pressing the magnetic material against the polished surface by a magnetic application means from the outside of the capillary tube. Has been proposed (see, for example, Patent Document 2).

  Further, a polishing method has been proposed in which a balloon is movably inserted into a pipe of a different diameter steel pipe and the inner surface of the pipe is polished by the outer surface of the balloon (see, for example, Patent Document 3).

  However, in the method of Patent Document 1, it is difficult for the core to penetrate the thin tube portion in the case of a different diameter tube having extremely thin ends, such as the different diameter tube shown in FIG. 3, and this method is used. In addition, it is necessary to make a core having a similar surface to the shape of the inner surface of the tube, and further, a device for allowing a viscoelastic medium to pass through is necessary and expensive.

  Further, the method of Patent Document 2 is complicated and expensive in the magnetic application means, and uses a magnetic material, so the polishing rate is slow and the productivity is poor.

Furthermore, the method of Patent Document 3 is not suitable for polishing an inner surface of a ceramic different diameter tube which is brittle and easily broken because the balloon is expanded in the tube.
JP-A-9-150365 JP-A-7-136925 Japanese Patent Laid-Open No. 2003-326444

  The present invention has been made in view of the above-described circumstances, and provides a polishing member that can reliably and easily polish the inner surface of a different diameter pipe at a low cost.

  Moreover, the grinding | polishing method of the inner surface of a different diameter pipe | tube which can grind | polish the inner surface reliably and easily, without breaking the different diameter ceramic tube in which the small diameter part was formed in both ends is provided.

  In order to achieve the above-described object, the polishing member according to the present invention has a shape portion at least partially in contact with an inner surface of a large diameter portion of a different diameter tube having a small diameter portion at both ends and a large diameter portion between the small diameter portions. And having a polishing part with abrasive grains attached to at least a part of the shape part, deforming the shape part and inserting it into the large diameter part through one of the small diameter parts. The shape of the shape portion is restored.

  Further, the method for polishing an inner surface of a different diameter pipe according to the present invention includes a shape portion having a small diameter portion at both ends and at least a portion in contact with the inner diameter of the different diameter tube having a large diameter portion between the small diameter portions. The shape member is deformed and inserted into the large diameter portion through one of the small diameter portions, the shape of the shape portion is restored in the large diameter portion, and the polishing member is moved to move the different diameter tube. The inner surface of the substrate is polished.

  According to the polishing member of the present invention, it is possible to provide a polishing member that can reliably and easily polish the inner surface of the different diameter pipe at a low cost.

  Further, according to the method for polishing an inner surface of a different diameter pipe according to the present invention, the inner surface of the different diameter pipe can be reliably and easily polished at a low cost without breaking the different diameter ceramic tube having small diameter portions formed at both ends. A polishing method can be provided.

  A polishing member and a method for polishing an inner surface of a different diameter pipe according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a conceptual diagram of a polishing member according to an embodiment of the present invention.

  As shown in FIG. 1, the polishing member 1 of the present embodiment is composed of a single metal wire 2 having a circular cross-section that is bent in the middle, and is bent in opposite directions in the vicinity of the center. A polishing portion 3a in which abrasive grains S are attached to at least a part of the shape portion 3 is provided, and an attachment portion 4 is provided at an end portion.

  The number of the metal wire 2 may be one or plural, and the cross-sectional shape is not limited to a circle, and may be any shape such as a star shape to which an abrasive easily adheres.

  The metal wire 2 is preferably one that has elasticity and easily returns to the original plastic deformation state once stretched, and includes stainless steel, phosphor bronze, beryllium copper, shape memory alloy, and the like.

  In particular, a shape memory alloy that can be easily restored to a desired shape is preferable. A shape restoration method using this shape memory alloy is as follows: 1) After inserting the polishing member, a gas or fluid lower than 100 ° C. is circulated in the different diameter pipe. The shape is restored, 2) the shape is restored by heating from one end of the polishing member by heat conduction, and the shape is restored by frictional heat generated during polishing.

  The shape portion 3 is plastically deformed into a shape along the inner surface of the large diameter portion p1 of the different diameter pipe P shown in FIG.

  In addition, the shape part 3 uses the shape suitable for the shape of a different diameter pipe | tube, the both ends open substantially circular shape shown to Fig.3 (a), the both ends open substantially circular shape shown to (b), (c 3) a combination of a semicircle and an ellipse with both ends open as shown in (2), (d) a middle coil shape, a substantially circular shape with both ends closed as shown in (e), and a substantially double circle shape with both ends closed as shown in (f). Etc.

  Although it is preferable to use the abrasive grains 3 with the abrasive grains S attached thereto, a polishing agent containing abrasive grains may be supplied in advance to the different diameter pipes, or the abrasive grains need not be used.

  The polishing member 1 is inexpensive because it is made of the metal wire 2 that is plastically deformed to form the shape portion 3, and the shape portion 3 follows the large diameter portion p1, so that the inner surface of the different diameter pipe P can be reliably and easily formed. Can be polished.

  According to the polishing jig of the present embodiment, a polishing member is realized that is inexpensive and can reliably and easily polish the inner surface of the different diameter tube.

  Next, the method for polishing the inner surface of the different diameter pipe according to the present invention will be described.

  As shown in FIG. 2, the method for polishing an inner surface of a different diameter tube according to the present invention includes a different diameter ceramic thin tube which is a different diameter ceramic tube P having both ends of small diameter portions p2 and p3 and a large diameter portion p1 formed in an intermediate portion. An abrasive member 1 of the invention is prepared (P1).

  Abrasive grains are previously attached to the polishing portion 3a provided in the shape portion 3 corresponding to the large diameter portion p1 and attached to the rotating device via the attachment portion 4.

  The polishing member 1 is inserted into the different diameter ceramic tube (P2).

  At this time, the shape part 3 passing through the small diameter part p2 is deformed and becomes substantially linear, and easily passes through the small diameter part p2.

  With the shape portion 3 reaching the large diameter portion p1, the shape portion 3 is restored to a shape along the inner surface of the large diameter portion p1 (P3).

  When the forming portion 3 is in contact with the entire inner surface of the large-diameter portion p1 of the different diameter pipe P, a portion that can be pressed well and a portion that is not pressed are formed. Therefore, the axial direction of the forming portion 3 is preferably shorter than the large diameter portion p1.

  The polishing member 1 is rotated in both directions, and the polishing portion 3a is moved along the inner surface of the large diameter portion p1 to polish the inner surface of the different diameter ceramic tube P (P4).

  In the above polishing process, when the shape portion 3 first passes through the small diameter portion p2, the shape 3 is crushed (stretched) by the small diameter portion p2, but is restored to a shape along the inner surface of the large diameter portion p1. The large diameter portion p1 returns to its original shape and comes into contact with the inner surface. Further, by rotating the polishing member 1 with a motor or the like, centrifugal force is further applied so that the inner surface and the polishing member 1 are more closely attached to each other. Can be reliably polished.

  Moreover, since the shape part 3 is formed so as to follow the inner surface shape of the large-diameter part p1, the large-diameter part p1 is not unnecessarily pressed, and even the fragile different-diameter ceramic tube P is broken. There is no.

  In addition, as a shape of the different diameter pipe | tube suitable for grinding | polishing by the grinding | polishing method of the different diameter pipe inner surface which concerns on this invention, the longitudinal cross-sectional shape shown to Fig.4 (a) is an hexagon, (b) the ellipse, (c) Examples include a circle, (d) a square as a quadrangle, a so-called lemon shape shown in (e), and (f) a circle of two or more.

  According to the polishing method for the inner surface of the different diameter pipe of the present embodiment, the inner surface of the different diameter pipe can be reliably and easily polished at a low cost without breaking the different diameter ceramic tube having small diameter portions formed at both ends. Is realized.

The conceptual diagram of the grinding | polishing member of one Embodiment of this invention. Process explanatory drawing of the grinding | polishing method of the different diameter pipe | tube inner surface of one Embodiment of this invention. (A)-(f) is a conceptual diagram of the modification of the polishing member of this invention. (A)-(f) is a conceptual diagram of the different diameter pipe | tube suitable for the grinding | polishing method of the inner diameter of the different diameter pipe | tube of this invention. The conceptual diagram of the grinding | polishing method of the conventional different diameter pipe inner surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Polishing member 2 Metal wire 3 Shape part 3a Polishing part 4 Attachment part P Different diameter pipe p1 Large diameter part p2, p3 Small diameter part S Abrasive grain

Claims (5)

Having a small diameter portion at both ends, and a shape portion at least partially in contact with the large diameter inner surface of the different diameter tube having a large diameter portion between the small diameter portions;
Provide a polishing part with abrasive grains attached to at least a part of this shape part,
Deforming the shape part and inserting it into the large diameter part through any of the small diameter parts,
A polishing member, wherein the shape of the shape portion is restored in the large diameter portion. The polishing member according to claim 1, wherein at least the shape portion is made of a shape memory alloy. In the different diameter pipe which has a small diameter part at both ends and has a large diameter part between the small diameter parts,
A polishing member having a shape part at least partially in contact with the inner surface of the large diameter part is deformed and inserted into the large diameter part through one of the small diameter parts,
The shape of the shape part is restored in the large diameter part,
A method for polishing an inner surface of a different diameter pipe, wherein the inner surface of the different diameter pipe is polished by moving the polishing member. The method for polishing an inner surface of a different diameter pipe according to claim 3, wherein the polishing member is provided with a polishing portion in which abrasive grains are attached to at least a part of the shape portion. The method for polishing an inner surface of a different-diameter pipe according to claim 3 or 4, wherein the polishing member is inserted into the different-diameter pipe after supplying an abrasive containing abrasive grains into the different-diameter pipe.

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