JP6192779B1 - Pipe grinding equipment - Google Patents

Pipe grinding equipment Download PDF

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JP6192779B1
JP6192779B1 JP2016136481A JP2016136481A JP6192779B1 JP 6192779 B1 JP6192779 B1 JP 6192779B1 JP 2016136481 A JP2016136481 A JP 2016136481A JP 2016136481 A JP2016136481 A JP 2016136481A JP 6192779 B1 JP6192779 B1 JP 6192779B1
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grinding
pipe
axial direction
grindstone
tube
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JP2018008317A (en
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守雄 吉本
守雄 吉本
洋三 沖野
洋三 沖野
宏之 吉井
宏之 吉井
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Kubota Corp
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Abstract

【課題】摩擦熱による研削部材の研削性能の低下を防止することが可能な管の研削装置を提供する。【解決手段】複数の回転自在な研削部材２６が支軸２４に設けられ、研削部材２６は、支軸２４に設けられた台盤部と、台盤部の外周に設けられた砥石部３２とを有し、支軸２４の軸心方向Ｂにおいて隣り合う研削部材２６の台盤部間にスペーサ３４が設けられている。【選択図】図２A pipe grinding apparatus capable of preventing a reduction in grinding performance of a grinding member due to frictional heat is provided. A plurality of rotatable grinding members 26 are provided on a support shaft 24. The grinding member 26 includes a base portion provided on the support shaft 24, and a grindstone portion 32 provided on the outer periphery of the base portion. A spacer 34 is provided between the base plate portions of the grinding members 26 adjacent to each other in the axial direction B of the support shaft 24. [Selection] Figure 2

Description

本発明は、管の内面を研削する研削装置に関する。   The present invention relates to a grinding apparatus for grinding an inner surface of a pipe.

従来、この種の研削装置としては、図１６に示すように、回転自在に支持された管１０１に対して、研削部材１０２を管１０１の軸心方向Ａへ移動させながら、管１０１の内面を研削するものがある。研削部材１０２は回転軸１０３の先端に設けられている。   Conventionally, as this kind of grinding apparatus, as shown in FIG. 16, the grinding member 102 is moved in the axial direction A of the tube 101 with respect to the tube 101 rotatably supported, and the inner surface of the tube 101 is moved. There is something to grind. The grinding member 102 is provided at the tip of the rotating shaft 103.

これによると、管１０１を軸心周りに回転させ、研削部材１０２を、回転軸１０３と共に回転させながら管１０１の内部に挿入し、管１０１の軸心方向Ａへ移動させる。これにより、研削部材１０２が、管１０１の内面に当接し、管１０１の軸心方向Ａへ移動しながら管１０１の内面を研削する。   According to this, the tube 101 is rotated around the axial center, and the grinding member 102 is inserted into the tube 101 while being rotated together with the rotating shaft 103, and is moved in the axial direction A of the tube 101. Thereby, the grinding member 102 contacts the inner surface of the tube 101 and grinds the inner surface of the tube 101 while moving in the axial direction A of the tube 101.

尚、上記のような管の研削装置は例えば下記特許文献１に記載されている。   A pipe grinding apparatus as described above is described in, for example, Patent Document 1 below.

特開２００１−２１９３４４JP 2001-219344

しかしながら上記の従来形式では、研削部材１０２で管１０１の内面を研削している際、研削部材１０２と管１０１の内面との摩擦熱によって研削部材１０２が高温になり、このため、研削部材１０２が劣化して脆くなり、研削部材１０２の研削性能が大幅に低下するという問題がある。   However, in the above conventional type, when the inner surface of the pipe 101 is ground by the grinding member 102, the grinding member 102 becomes high temperature due to frictional heat between the grinding member 102 and the inner surface of the pipe 101. There is a problem that the material becomes deteriorated and becomes brittle, and the grinding performance of the grinding member 102 is greatly lowered.

本発明は、摩擦熱による研削部材の研削性能の低下を防止することが可能な管の研削装置を提供することを目的とする。   An object of the present invention is to provide a pipe grinding apparatus capable of preventing a reduction in grinding performance of a grinding member due to frictional heat.

上記目的を達成するために、本第１発明は、管と研削部材との少なくとも一方を、他方に対して、管の軸心方向へ移動させながら管の内面を研削する研削装置であって、
複数の回転自在な研削部材が支軸に設けられ、
研削部材は、支軸に設けられた台盤部と、台盤部の外周に設けられた砥石部とを有し、
支軸の軸心方向において隣り合う研削部材の台盤部間にスペーサが設けられ、
支軸の軸心方向において貫通する孔が台盤部に形成され、
スペーサは孔を塞がないように構成されているものである。 To achieve the above object, the first invention is a grinding apparatus for grinding an inner surface of a pipe while moving at least one of a pipe and a grinding member in the axial direction of the pipe with respect to the other.
A plurality of rotatable grinding members are provided on the support shaft,
The grinding member has a base part provided on the spindle and a grindstone part provided on the outer periphery of the base part,
A spacer is provided between the base parts of the grinding members adjacent in the axial direction of the support shaft ,
A hole penetrating in the axial direction of the support shaft is formed in the platform,
The spacer is configured so as not to block the hole .

これによると、管を軸心周りに回転させ、研削部材を、回転させながら管の内面に当接させ、管の軸心方向へ移動させる。これにより、研削部材が管の軸心方向へ移動しながら管の内面を研削する。   According to this, the tube is rotated around the axis, and the grinding member is brought into contact with the inner surface of the tube while rotating, and is moved in the axial direction of the tube. As a result, the inner surface of the tube is ground while the grinding member moves in the axial direction of the tube.

この際、研削部材の砥石部と管の内面との摩擦によって摩擦熱が発生するが、この摩擦熱は、研削部材の砥石部から台盤部に伝わって、台盤部から放散されるとともに、台盤部からスペーサに伝わり、スペーサからも放散される。これにより、摩擦熱の放散（放熱）が促進され、研削部材の砥石部の温度上昇が抑制されるため、砥石部が高温になり劣化して脆くなるのを防止することができ、研削部材の研削性能の低下を防止することができる。   At this time, frictional heat is generated by friction between the grindstone part of the grinding member and the inner surface of the pipe, but this frictional heat is transmitted from the grindstone part of the grinding member to the base part and dissipated from the base part, It is transmitted from the platform to the spacer and is also dissipated from the spacer. As a result, the dissipation (heat dissipation) of frictional heat is promoted and the temperature rise of the grindstone portion of the grinding member is suppressed, so that the grindstone portion can be prevented from becoming hot and deteriorating and becoming brittle. A reduction in grinding performance can be prevented.

また、支軸の軸心方向において隣り合う研削部材同士はスペーサを介して離間しているため、管の内面を研削している際に発生する研削屑が、互いに隣り合った研削部材間から容易に排出される。これにより、研削屑の排出性能が向上するため、研削部材の研削性能の低下をさらに防止することができる。   In addition, since the grinding members adjacent to each other in the axial direction of the support shaft are separated by a spacer, grinding waste generated when grinding the inner surface of the pipe can be easily performed between the grinding members adjacent to each other. To be discharged. Thereby, since the discharge | emission performance of grinding waste improves, the fall of the grinding performance of a grinding member can further be prevented.

さらに、摩擦熱は台盤部の孔からも放散されるため、摩擦熱の放散がより一段と促進される。
本第２発明における管の研削装置は、台盤部とスペーサとは金属製である。 Furthermore , since the frictional heat is also dissipated from the holes in the base plate, the dissipation of the frictional heat is further promoted.
In the pipe grinding apparatus according to the second aspect of the present invention, the base and the spacer are made of metal.

これによると、摩擦熱が研削部材の砥石部から台盤部を経てスペーサに伝わり易く、摩擦熱を台盤部とスペーサとから放散させることができる。
本第３発明における管の研削装置は、砥石部は、台盤部の周方向において間隔をあけて複数設けられているとともに、台盤部の外周から径方向外側に突出しているものである。 According to this, the frictional heat is easily transmitted from the grindstone part of the grinding member to the spacer through the base part, and the frictional heat can be dissipated from the base part and the spacer.
In the pipe grinding apparatus according to the third aspect of the present invention, a plurality of grindstone portions are provided at intervals in the circumferential direction of the base plate portion, and project radially outward from the outer periphery of the base plate portion.

これによると、複数の砥石部が台盤部の周方向において間隔をあけて離間した状態で設けられているため、管の内面を切削している際に発生する研削屑が、台盤部の周方向において隣り合った砥石部間から容易に排出される。これにより、研削屑の排出性能が向上するため、研削部材の研削性能の低下を防止することができる。   According to this, since the plurality of grindstone portions are provided in a state of being spaced apart in the circumferential direction of the platform portion, grinding waste generated when cutting the inner surface of the pipe is It is easily discharged from between the adjacent grindstone parts in the circumferential direction. Thereby, since the discharge | emission performance of grinding waste improves, the fall of the grinding performance of a grinding member can be prevented.

本第４発明における管の研削装置は、砥石部は、外周部に、山形状の突起を有しているものである。
これによると、回転している研削部材の砥石部の山形状の突起が管の内面を切削することにより、管の内面の切削性能が向上する。 In the pipe grinding apparatus according to the fourth aspect of the invention, the grindstone portion has a mountain-shaped projection on the outer peripheral portion.
According to this, the cutting performance of the inner surface of the pipe is improved by the mountain-shaped projections of the grindstone portion of the rotating grinding member cutting the inner surface of the pipe.

本第５発明における管の研削装置は、砥石部は、外周部に、多角形状の突起を有しているものである。
これによると、回転している研削部材の砥石部の多角形状の突起が管の内面を切削することにより、管の内面の切削性能が向上する。 In the tube grinding apparatus according to the fifth aspect of the invention, the grindstone portion has a polygonal protrusion on the outer peripheral portion.
According to this, the cutting performance of the inner surface of the tube is improved by the polygonal protrusions of the grindstone portion of the rotating grinding member cutting the inner surface of the tube.

本第６発明における管の研削装置は、突起は、支軸の軸心方向における端部に、角部を有しているものである。
これによると、研削部材が回転しながら管の軸心方向へ移動し、砥石部の突起が管の内面を切削することにより、管の内面が研削される。この際、突起は、支軸の軸心方向における端部に角部を有しているため、角部を先頭にして管の軸心方向に移動する。このため、管の軸心方向への研削部材の移動が円滑に行える。 In the pipe grinding apparatus according to the sixth aspect of the invention, the protrusion has a corner at the end in the axial direction of the support shaft.
According to this, the grinding member moves in the axial direction of the tube while rotating, and the projection of the grindstone cuts the inner surface of the tube, whereby the inner surface of the tube is ground. At this time, since the projection has a corner at the end in the axial direction of the support shaft, the projection moves in the axial direction of the tube with the corner as the head. For this reason, the grinding member can be smoothly moved in the axial direction of the pipe.

本第７発明における管の研削装置は、突起は、研削部材の回転方向における端部に、角部を有しているものである。
これによると、研削部材が回転しながら管の軸心方向へ移動し、砥石部の突起が管の内面を切削することにより、管の内面が研削される。この際、突起は、研削部材の回転方向における端部に角部を有しているため、角部を先頭にして回転する。このため、研削部材の回転が円滑に行える。 In the pipe grinding apparatus according to the seventh aspect of the invention, the protrusion has a corner at the end in the rotation direction of the grinding member.
According to this, the grinding member moves in the axial direction of the tube while rotating, and the projection of the grindstone cuts the inner surface of the tube, whereby the inner surface of the tube is ground. At this time, since the protrusion has a corner at the end in the rotation direction of the grinding member, the protrusion rotates with the corner as the head. For this reason, the grinding member can be smoothly rotated.

本第８発明は、管と研削部材との少なくとも一方を、他方に対して、管の軸心方向へ移動させながら管の内面を研削する研削装置であって、
複数の回転自在な研削部材が支軸に設けられ、
研削部材は、支軸に設けられた台盤部と、台盤部の外周に設けられた砥石部とを有し、
台盤部は支軸の軸心方向において複数設けられ、
支軸の軸心方向において隣り合う研削部材の台盤部間にスペーサが設けられ、
砥石部は、外周部に、多角形状の突起を有し、
突起は研削屑を砥石部から台盤部間に案内する案内面を有しているものである。
これによると、回転している研削部材の砥石部の突起が管の内面を切削している際、研削屑が発生するが、この研削屑は、突起の案内面によって砥石部から台盤部間に案内されて、研削部材間から容易に排出される。このため、研削屑の排出性能が向上し、研削部材の研削性能の低下をさらに防止することができる。 The eighth invention is a grinding apparatus for grinding an inner surface of a pipe while moving at least one of a pipe and a grinding member relative to the other in the axial direction of the pipe,
A plurality of rotatable grinding members are provided on the support shaft,
The grinding member has a base part provided on the spindle and a grindstone part provided on the outer periphery of the base part,
A plurality of base parts are provided in the axial direction of the support shaft,
A spacer is provided between the base parts of the grinding members adjacent in the axial direction of the support shaft,
The grindstone has a polygonal protrusion on the outer periphery,
The protrusion has a guide surface for guiding the grinding scrap between the grindstone portion and the platform portion.
According to this, when the projection of the grindstone portion of the rotating grinding member is cutting the inner surface of the pipe, grinding waste is generated. This grinding waste is generated between the grindstone portion and the base plate portion by the guide surface of the projection. It is easily discharged from between the grinding members. For this reason, the grinding | polishing waste discharge performance improves and it can prevent further the fall of the grinding performance of a grinding member.

以上のように本発明によると、管の内面を研削している際、研削部材の砥石部と管の内面との摩擦によって摩擦熱が発生するが、この摩擦熱は、研削部材の砥石部から台盤部に伝わって、台盤部から放散されるとともに、台盤部からスペーサに伝わり、スペーサからも放散される。これにより、摩擦熱の放散が促進され、研削部材の砥石部の温度上昇が抑制されるため、砥石部が高温になり劣化して脆くなるのを防止することができ、研削部材の研削性能の低下を防止することができる。   As described above, according to the present invention, when the inner surface of the pipe is being ground, frictional heat is generated due to friction between the grinding stone portion of the grinding member and the inner surface of the pipe. This frictional heat is generated from the grinding stone portion of the grinding member. It is transmitted to the base part and diffused from the base part, and is transmitted from the base part to the spacer and is also diffused from the spacer. As a result, the dissipation of frictional heat is promoted, and the temperature rise of the grindstone portion of the grinding member is suppressed, so that the grindstone portion can be prevented from becoming hot and deteriorating and becoming brittle. A decrease can be prevented.

本発明の第１の実施の形態における管の研削装置の側面図である。1 is a side view of a pipe grinding apparatus according to a first embodiment of the present invention. 同、研削装置の要部の側面図である。It is a side view of the principal part of a grinding device. 同、研削装置の要部の分解図である。It is an exploded view of the principal part of a grinding device. 図２におけるＸ−Ｘ矢視図である。FIG. 3 is an XX arrow view in FIG. 2. 本発明の第２の実施の形態における研削装置の研削部材の側面図である。It is a side view of the grinding member of the grinding apparatus in the 2nd Embodiment of this invention. 本発明の第３の実施の形態における研削装置の要部の側面図である。It is a side view of the principal part of the grinding device in the 3rd Embodiment of this invention. 同、研削装置の研削部材の斜視図である。It is a perspective view of the grinding member of a grinding device. 図６におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、研削装置の研削部材の側面図である。It is a side view of the grinding member of the grinding device. 同、研削装置の研削部材の突起の拡大図である。It is an enlarged view of the protrusion of the grinding member of the grinding device. 本発明の第４の実施の形態における研削装置の研削部材の一部拡大斜視図である。It is a partially expanded perspective view of the grinding member of the grinding apparatus in the 4th Embodiment of this invention. 本発明の第５の実施の形態における研削装置の要部の側面図である。It is a side view of the principal part of the grinding device in the 5th Embodiment of this invention. 図１２におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、研削装置の砥石部の拡大斜視図である。It is an enlarged perspective view of the grindstone part of the grinding device. 表１に記載した比較例１における研削装置の要部の側面図である。It is a side view of the principal part of the grinding apparatus in the comparative example 1 described in Table 1. 従来の管の研削装置の要部の側面図である。It is a side view of the principal part of the conventional pipe grinding apparatus.

以下、本発明における実施の形態を、図面を参照して説明する。
（第１の実施の形態）
第１の実施の形態では、図１〜図４に示すように、１はダクタイル鋳鉄製の直管（ダクタイル鋳鉄管）であり、一端部に挿口２を有し、他端部に受口３を有している。１０は管１を回転自在に支持する支持装置である。支持装置１０は、水平姿勢の管１を下方から支持する複数の支持ローラ１１と、管１を上方から押圧して管１の飛び跳ねを防止する昇降自在な押圧ローラ１２と、支持ローラ１１上に支持された管１を軸心周りに回転させる回転駆動手段（図示省略）とを有している。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
In the first embodiment, as shown in FIG. 1 to FIG. 4, 1 is a ductile cast iron straight pipe (ductile cast iron pipe), has an insertion slot 2 at one end, and a receptacle at the other end. 3. Reference numeral 10 denotes a support device for rotatably supporting the tube 1. The support device 10 includes a plurality of support rollers 11 that support the tube 1 in a horizontal posture from below, a press roller 12 that can be raised and lowered to press the tube 1 from above and prevent the tube 1 from jumping, and a support roller 11. Rotation drive means (not shown) for rotating the supported tube 1 around the axis.

２０は管１の内面を研削する研削装置である。研削装置２０は、管１の軸心方向Ａに移動可能な台車２１と、台車２１上に設けられた昇降自在なフレーム２２と、フレーム２２を昇降させるジャッキ装置（図示省略）と、フレーム２２上に設けられた軸受装置２３と、軸受装置２３に回転自在に設けられた支軸２４と、支軸２４を回転させるモータ等の回転駆動装置２５と、支軸２４の先端部に設けられた複数の研削部材２６とを有している。   Reference numeral 20 denotes a grinding device for grinding the inner surface of the tube 1. The grinding device 20 includes a carriage 21 movable in the axial direction A of the tube 1, a vertically movable frame 22 provided on the carriage 21, a jack device (not shown) for raising and lowering the frame 22, A bearing device 23 provided on the bearing device 23, a support shaft 24 provided rotatably on the bearing device 23, a rotation drive device 25 such as a motor for rotating the support shaft 24, and a plurality of devices provided at the tip of the support shaft 24. The grinding member 26 is provided.

支軸２４は、軸本体部２８と、軸本体部２８の先端に設けられた取付軸部２９と、取付軸部２９の先端部に設けられたキャップ３０とを有している。取付軸部２９は軸本体部２８の先端にねじを介して着脱自在に螺合して取り付けられている。また、キャップ３０は取付軸部２９の先端部にねじを介して着脱自在に螺合して取り付けられている。   The support shaft 24 includes a shaft main body portion 28, an attachment shaft portion 29 provided at the distal end of the shaft main body portion 28, and a cap 30 provided at the distal end portion of the attachment shaft portion 29. The attachment shaft portion 29 is attached to the tip of the shaft main body portion 28 by being detachably screwed via a screw. The cap 30 is attached to the tip end portion of the attachment shaft portion 29 by being detachably screwed via a screw.

尚、支軸２４の軸心方向Ｂは支持装置１０に支持された管１の軸心方向Ａと同方向である。
各研削部材２６は、支軸２４に着脱自在に設けられた円板状の台盤部３１と、台盤部３１の外周に設けられた複数の砥石部３２とを有している。支軸２４の軸心方向Ｂにおいて隣り合う研削部材２６の台盤部３１間にはそれぞれスペーサ３４が設けられている。また、研削部材２６と支軸２４の軸本体部２８の端部との間および研削部材２６と支軸２４のキャップ３０との間にも、それぞれ、スペーサ３５が設けられている。 The axial direction B of the support shaft 24 is the same as the axial direction A of the tube 1 supported by the support device 10.
Each grinding member 26 has a disk-shaped base part 31 detachably provided on the support shaft 24 and a plurality of grindstone parts 32 provided on the outer periphery of the base part 31. Spacers 34 are provided between the base portions 31 of the grinding members 26 adjacent in the axial direction B of the support shaft 24. Spacers 35 are also provided between the grinding member 26 and the end of the shaft main body 28 of the support shaft 24 and between the grinding member 26 and the cap 30 of the support shaft 24.

台盤部３１の中央部とスペーサ３４，３５の中央部とにはそれぞれ軸孔３７が形成され、支軸２４の取付軸部２９が軸孔３７に挿入されている。また、取付軸部２９には、植込キー等の回り止め部材（図示省略）が設けられ、この回り止め部材によって、研削部材２６とスペーサ３４，３５とが取付軸部２９に対して相対的に周方向へ空転するのを阻止しており、これにより、支軸２４の回転力が回り止め部材を介して研削部材２６とスペーサ３４，３５とに伝えられ、研削部材２６とスペーサ３４，３５とが支軸２４と一体に回転する。   A shaft hole 37 is formed in each of the center portion of the base plate portion 31 and the center portions of the spacers 34 and 35, and the mounting shaft portion 29 of the support shaft 24 is inserted into the shaft hole 37. Further, the mounting shaft 29 is provided with a non-rotating member (not shown) such as an embedding key, by which the grinding member 26 and the spacers 34 and 35 are relative to the mounting shaft 29. Thus, the rotational force of the support shaft 24 is transmitted to the grinding member 26 and the spacers 34 and 35 via the anti-rotation member, and the grinding member 26 and the spacers 34 and 35 are thereby prevented. And rotate together with the support shaft 24.

台盤部３１には、支軸２４の軸心方向Ｂにおいて貫通する複数の孔３８が形成されている。各孔３８は、軸孔３７の周囲に、所定角度（例えば図４では６０°）おきに形成されている。   A plurality of holes 38 penetrating in the axial direction B of the support shaft 24 are formed in the base plate portion 31. Each hole 38 is formed around the shaft hole 37 at a predetermined angle (for example, 60 ° in FIG. 4).

スペーサ３４，３５は円環状の部材であり、スペーサ３４，３５は同じ内径および同じ外径を有し、図２に示すように、軸心方向Ｂにおけるスペーサ３４の幅Ｃがスペーサ３５の幅Ｄよりも大きい。また、図４に示すように、各スペーサ３４，３５の中心から外周までの距離Ｌ１は台盤部３１の中心から孔３８の最も近い縁部までの距離Ｌ２以下に設定されている。これにより、各スペーサ３４，３５は台盤部３１の孔３８を塞がない構成を有している。   The spacers 34 and 35 are annular members, and the spacers 34 and 35 have the same inner diameter and the same outer diameter, and the width C of the spacer 34 in the axial direction B is equal to the width D of the spacer 35 as shown in FIG. Bigger than. Further, as shown in FIG. 4, the distance L1 from the center of each spacer 34, 35 to the outer periphery is set to be equal to or less than the distance L2 from the center of the base plate portion 31 to the nearest edge of the hole 38. Thereby, each spacer 34 and 35 has the structure which does not block the hole 38 of the base part 31. FIG.

台盤部３１とスペーサ３４，３５とはそれぞれ、鉄やステンレス鋼等の金属製である。尚、台盤部３１とスペーサ３４，３５との材質は、熱伝動性が良好であり、十分な強度が確保されるのであれば鉄やステンレス鋼以外の材質であってもよい。   The base part 31 and the spacers 34 and 35 are each made of metal such as iron or stainless steel. In addition, the material of the base part 31 and the spacers 34 and 35 may be a material other than iron or stainless steel as long as heat conductivity is good and sufficient strength is ensured.

各砥石部３２は、ダイヤモンドの砥粒を含んでおり、台盤部３１の周方向において所定角度（図４では２０°）ごとに所定間隔をあけて形成されているとともに、台盤部３１の外周から径方向外側に突出している。   Each grindstone portion 32 includes diamond abrasive grains and is formed at predetermined intervals (20 ° in FIG. 4) at a predetermined interval in the circumferential direction of the base plate portion 31. Projects radially outward from the outer periphery.

各砥石部３２は、外周部に、複数の山形状の突起４１を有している。これら突起４１の先端の稜線４２は研削部材２６の周方向に延びている。尚、図２，図３に示すように、研削部材２６の周方向において隣り同士の関係にある一方の砥石部３２と他方の砥石部３２との各突起４１の山部４１ａは軸心方向Ｂにおいて同じ位置であり、同様に、各突起４１の谷部４１ｂも軸心方向Ｂにおいて同じ位置である。   Each grindstone portion 32 has a plurality of mountain-shaped protrusions 41 on the outer peripheral portion. The ridge lines 42 at the tips of the protrusions 41 extend in the circumferential direction of the grinding member 26. As shown in FIGS. 2 and 3, the crest 41 a of each protrusion 41 of one grindstone portion 32 and the other grindstone portion 32 that are adjacent to each other in the circumferential direction of the grinding member 26 is in the axial direction B. Similarly, the valley 41b of each protrusion 41 is also in the same position in the axial direction B.

尚、図２に示すように、軸心方向Ｂにおける研削部材２６の幅Ｅはスペーサ３４の幅Ｃと同じ又は、それ以下である。また、研削部材２６の外径は管１の内径よりも小さい。
以下、上記構成における作用を説明する。 As shown in FIG. 2, the width E of the grinding member 26 in the axial direction B is equal to or smaller than the width C of the spacer 34. The outer diameter of the grinding member 26 is smaller than the inner diameter of the tube 1.
Hereinafter, the operation of the above configuration will be described.

図１に示すように、管１を、支持装置１０の支持ローラ１１上に載せて、上方から押圧ローラ１２で押圧し、回転駆動手段で軸心周りに回転させる。研削装置２０のフレーム２２を昇降させて研削部材２６の高さを調節し、回転駆動装置２５によって支軸２４を回転させて、研削部材２６を管１と同方向へ回転させる。   As shown in FIG. 1, the tube 1 is placed on the support roller 11 of the support device 10, pressed from above by the pressing roller 12, and rotated around the axis by the rotation driving means. The frame 22 of the grinding device 20 is moved up and down to adjust the height of the grinding member 26, and the support shaft 24 is rotated by the rotation drive device 25 to rotate the grinding member 26 in the same direction as the pipe 1.

この状態で台車２１を前進させ、研削部材２６を管１の一端部から内部へ挿入し、フレーム２２を下降して、研削部材２６を適切な力で管１の内面に押し当てる（当接させる）。この状態でさらに台車２１をゆっくりと前進させ、管１内で、研削部材２６を軸心方向Ａへ移動させる。これにより、研削部材２６が回転しながら管１の軸心方向Ａへ移動して管１の内面を研削するため、管１の内面の酸化スケール等が除去される。   In this state, the carriage 21 is advanced, the grinding member 26 is inserted from one end of the tube 1 into the inside, the frame 22 is lowered, and the grinding member 26 is pressed against (in contact with) the inner surface of the tube 1 with an appropriate force. ). In this state, the carriage 21 is further advanced slowly, and the grinding member 26 is moved in the axial direction A within the pipe 1. As a result, the grinding member 26 moves in the axial direction A of the tube 1 while rotating to grind the inner surface of the tube 1, so that the oxide scale and the like on the inner surface of the tube 1 are removed.

この際、研削部材２６の砥石部３２と管１の内面との摩擦によって摩擦熱が発生するが、この摩擦熱は、砥石部３２から台盤部３１に伝わって、台盤部３１の孔３８から放散されるとともに、台盤部３１からスペーサ３４，３５に伝わり、スペーサ３４，３５からも放散される。これにより、摩擦熱の放散（放熱）が促進され、砥石部３２の温度上昇が抑制されるため、砥石部３２が高温になり劣化して脆くなるのを防止することができ、研削部材２６の研削性能の低下を防止することができる。   At this time, frictional heat is generated by friction between the grindstone portion 32 of the grinding member 26 and the inner surface of the tube 1. This frictional heat is transmitted from the grindstone portion 32 to the base plate portion 31, and the hole 38 of the base plate portion 31. Is transmitted from the base plate 31 to the spacers 34 and 35, and is also dissipated from the spacers 34 and 35. Thereby, the dissipation (heat dissipation) of frictional heat is promoted, and the temperature rise of the grindstone portion 32 is suppressed. Therefore, the grindstone portion 32 can be prevented from becoming high temperature and deteriorating and becoming brittle. A reduction in grinding performance can be prevented.

また、台盤部３１とスペーサ３４，３５とは金属製（例えば鉄やステンレス鋼等）であるため、摩擦熱が砥石部３２から台盤部３１を経てスペーサ３４，３５に伝わり易く、摩擦熱を台盤部３１とスペーサ３４，３５とから放散させることができる。   Further, since the base part 31 and the spacers 34 and 35 are made of metal (for example, iron or stainless steel), the frictional heat is easily transmitted from the grindstone part 32 to the spacers 34 and 35 via the base part 31, and the frictional heat. Can be diffused from the base part 31 and the spacers 34 and 35.

また、軸心方向Ｂにおいて隣り合う研削部材２６同士はスペーサ３４を介して離間しているため、管１の内面を研削している際に発生する研削屑が、互いに隣り合った研削部材２６間から管１内に容易に排出される。これにより、研削屑の排出性能が向上するため、研削部材２６の研削性能の低下をさらに防止することができる。   Further, since the grinding members 26 adjacent in the axial direction B are separated from each other via the spacer 34, the grinding waste generated when grinding the inner surface of the pipe 1 is between the grinding members 26 adjacent to each other. Is easily discharged into the tube 1. Thereby, since the discharge performance of grinding waste improves, the fall of the grinding performance of the grinding member 26 can further be prevented.

さらに、複数の砥石部３２は台盤部３１の周方向において所定間隔をあけて離間した状態で設けられているため、管１の内面を切削している際に発生する研削屑が、台盤部３１の周方向において隣り合った砥石部３２間から容易に排出される。これにより、研削屑の排出性能がさらに向上するため、研削部材２６の研削性能の低下を防止することができる。   Further, since the plurality of grindstone portions 32 are provided in a state of being spaced apart from each other at a predetermined interval in the circumferential direction of the base plate portion 31, grinding waste generated when cutting the inner surface of the tube 1 is It is easily discharged from between the adjacent grindstone portions 32 in the circumferential direction of the portion 31. Thereby, since the discharge | emission performance of grinding waste improves further, the fall of the grinding performance of the grinding member 26 can be prevented.

また、回転している研削部材２６の砥石部３２の山形状の突起４１が管１の内面を切削することにより、管１の内面の切削性能が向上する。
（第２の実施の形態）
第２の実施の形態では、図５に示すように、研削部材２６の周方向において隣り同士の関係にある一方の砥石部３２と他方の砥石部３２との各突起４１の山部４１ａの位置と谷部４１ｂの位置とが軸心方向Ｂにおいてずれている。すなわち、上記隣り同士の関係にある一方の砥石部３２の突起４１の山部４１ａの位置と他方の砥石部３２の突起４１の谷部４１ｂの位置とが軸心方向Ｂにおいて一致し、一方の砥石部３２の突起４１の谷部４１ｂの位置と他方の砥石部３２の突起４１の山部４１ａの位置とが一致している。 Moreover, the cutting performance of the inner surface of the tube 1 is improved by the mountain-shaped protrusion 41 of the grindstone portion 32 of the rotating grinding member 26 cutting the inner surface of the tube 1.
(Second Embodiment)
In the second embodiment, as shown in FIG. 5, the positions of the peaks 41 a of the protrusions 41 of one grindstone portion 32 and the other grindstone portion 32 that are adjacent to each other in the circumferential direction of the grinding member 26. And the position of the valley 41b are shifted in the axial direction B. That is, the position of the peak 41a of the protrusion 41 of the one grindstone part 32 and the position of the valley 41b of the protrusion 41 of the other grindstone part 32 coincide with each other in the axial direction B. The position of the valley 41b of the protrusion 41 of the grindstone 32 matches the position of the peak 41a of the protrusion 41 of the other grindstone 32.

これによると、先述した第１の実施の形態と同様の作用および効果が得られる。
（第３の実施の形態）
第３の実施の形態では、図６〜図１０に示すように、各砥石部３２は、外周部に、径方向外側から見て菱形（多角形の一例）状の突起５０を有している。すなわち、研削部材２６の径方向における突起５０の外端面５０ａが菱形状に形成されている。また、突起５０は、支軸２４の軸心方向Ｂにおける両端部に、第１の角部５０ｂを有し、研削部材２６の回転方向Ｊにおける両端部に、第２の角部５０ｃを有している。これら第１および第２の角部５０ｂ，５０ｃはそれぞれＶ形状に尖っており、第１の角部５０ｂの頂角が鋭角、第２の角部５０ｃの頂角が鈍角である。 According to this, the same operation and effect as the first embodiment described above can be obtained.
(Third embodiment)
In 3rd Embodiment, as shown in FIGS. 6-10, each grindstone part 32 has the processus | protrusion 50 of a rhombus (an example of a polygon) seeing from a radial direction outer side in an outer peripheral part. . That is, the outer end surface 50a of the protrusion 50 in the radial direction of the grinding member 26 is formed in a rhombus shape. Further, the protrusion 50 has first corners 50 b at both ends in the axial direction B of the support shaft 24, and has second corners 50 c at both ends in the rotation direction J of the grinding member 26. ing. Each of the first and second corner portions 50b and 50c is pointed in a V shape, the apex angle of the first corner portion 50b is an acute angle, and the apex angle of the second corner portion 50c is an obtuse angle.

さらに、突起５０は、研削屑５２を砥石部３２から隣り合った両台盤部３１間に案内する案内面５１を有している。案内面５１は、研削部材２６の回転方向Ｊにおいて、第２の角部５０ｃから支軸２４の軸心方向ＢにＶ字状に延びている。   Further, the protrusion 50 has a guide surface 51 that guides the grinding scraps 52 between the two base plate parts 31 adjacent to the grindstone part 32. The guide surface 51 extends in a V shape in the axial direction B of the support shaft 24 from the second corner portion 50 c in the rotation direction J of the grinding member 26.

尚、図９に示すように、突起５０の対角線のうち、長い方の対角線５３が支軸２４の軸心２４ａに平行な直線５４に対して所定角度Ｇで交差するように、突起５０の向きを研削部材２６の周方向に傾斜させている。   As shown in FIG. 9, the orientation of the protrusion 50 is such that the longer diagonal line 53 of the protrusions 50 intersects the straight line 54 parallel to the axis 24 a of the support shaft 24 at a predetermined angle G. Is inclined in the circumferential direction of the grinding member 26.

以下、上記構成における作用を説明する。
研削部材２６が回転しながら管１の軸心方向Ａへ移動して管１の内面を研削している際、回転している研削部材２６の砥石部３２の菱形状の突起５０が管１の内面を切削することにより、管１の内面の切削性能が向上する。 Hereinafter, the operation of the above configuration will be described.
When the grinding member 26 rotates and moves in the axial direction A of the tube 1 to grind the inner surface of the tube 1, the diamond-shaped protrusions 50 of the grindstone portion 32 of the rotating grinding member 26 are formed on the tube 1. By cutting the inner surface, the cutting performance of the inner surface of the tube 1 is improved.

図１０に示すように、このとき発生する研削屑５２は、突起５０の第２の角部５０ｃから両案内面５１に掻き分けられ、案内面５１によって研削部材２６から隣り合った両台盤部３１間に案内されるため、研削部材２６間のスペースに容易に排出される。このため、研削屑５２の排出性能が向上し、研削部材２６の研削性能の低下をさらに防止することができる。   As shown in FIG. 10, the grinding dust 52 generated at this time is scraped to the both guide surfaces 51 from the second corner portion 50 c of the protrusion 50, and the two base plate portions 31 adjacent to the grinding member 26 by the guide surfaces 51. Since it is guided in between, it is easily discharged into the space between the grinding members 26. For this reason, the discharge | emission performance of the grinding waste 52 improves and the fall of the grinding performance of the grinding member 26 can further be prevented.

また、突起５０は第１の角部５０ｂを先頭にして管１の軸心方向Ａに移動するため、軸心方向Ａへの研削部材２６の移動が円滑に行える。さらに、突起５０は第２の角部５０ｃを先頭にして回転するため、研削部材２６の回転が円滑に行える。   Further, since the protrusion 50 moves in the axial direction A of the tube 1 with the first corner 50b as the head, the grinding member 26 can be smoothly moved in the axial direction A. Furthermore, since the protrusion 50 rotates with the second corner portion 50c as the head, the grinding member 26 can rotate smoothly.

（第４の実施の形態）
上記第３の実施の形態では、図７に示すように、各砥石部３２は、外周部に、多角形の一例である菱形状の突起５０を有しているが、第４の実施の形態では、図１１に示すように、各砥石部３２は、外周部に、多角形の別の例である長方形状の突起６０を有している。すなわち、研削部材２６の径方向における突起６０の外端面６０ａが、径方向外側から見て、長方形状に形成されている。 (Fourth embodiment)
In the said 3rd Embodiment, as shown in FIG. 7, each grindstone part 32 has the rhombus-shaped protrusion 50 which is an example of a polygon in the outer peripheral part, but 4th Embodiment. Then, as shown in FIG. 11, each grindstone part 32 has a rectangular protrusion 60 which is another example of a polygon on the outer peripheral part. That is, the outer end surface 60a of the protrusion 60 in the radial direction of the grinding member 26 is formed in a rectangular shape when viewed from the outside in the radial direction.

以下、上記構成における作用を説明する。
研削部材２６が回転しながら管１の軸心方向Ａへ移動して管１の内面を研削している際、回転している研削部材２６の砥石部３２の長方形状の突起６０が管１の内面を切削することにより、管１の内面の切削性能が向上する。 Hereinafter, the operation of the above configuration will be described.
When the grinding member 26 rotates and moves in the axial direction A of the tube 1 to grind the inner surface of the tube 1, the rectangular protrusion 60 of the grindstone portion 32 of the rotating grinding member 26 is formed on the tube 1. By cutting the inner surface, the cutting performance of the inner surface of the tube 1 is improved.

上記第３および第４の実施の形態では、多角形の一例として、菱形状又は長方形状の突起５０，６０を設けたが、菱形状や長方形状以外の四角形でもよく、或いは、三角形、五角形以上であってもよい。   In the third and fourth embodiments, the rhombus or rectangular protrusions 50 and 60 are provided as an example of a polygon. However, a rhombus or a rectangle other than the rectangle may be used, or a triangle, pentagon or more may be used. It may be.

（第５の実施の形態）
第５の実施の形態では、図１２〜図１４に示すように、各砥石部３２は、外周部に、先端が尖った四角錐状の突起６５を有している。突起６５は、支軸２４の軸心方向Ｂにおける両端部に、第１の角部６５ａを有し、研削部材２６の回転方向Ｊにおける両端部に、第２の角部６５ｂを有している。 (Fifth embodiment)
In the fifth embodiment, as shown in FIGS. 12 to 14, each grindstone portion 32 has a quadrangular pyramid-shaped protrusion 65 with a sharp tip on the outer peripheral portion. The protrusions 65 have first corners 65 a at both ends in the axial direction B of the support shaft 24, and second corners 65 b at both ends in the rotation direction J of the grinding member 26. .

以下、上記構成における作用を説明する。
研削部材２６が回転しながら管１の軸心方向Ａへ移動して管１の内面を研削している際、回転している研削部材２６の砥石部３２の四角錐状の突起６５が管１の内面を切削することにより、管１の内面の切削性能が向上する。 Hereinafter, the operation of the above configuration will be described.
When the grinding member 26 rotates and moves in the axial direction A of the tube 1 to grind the inner surface of the tube 1, the quadrangular pyramid-shaped protrusions 65 of the grindstone 32 of the rotating grinding member 26 are in the tube 1. By cutting the inner surface, the cutting performance of the inner surface of the tube 1 is improved.

また、突起６５は第１の角部６５ａを先頭にして管１の軸心方向Ａに移動するため、軸心方向Ａへの研削部材２６の移動が円滑に行える。さらに、突起５０は第２の角部６５ｂを先頭にして回転するため、研削部材２６の回転が円滑に行える。   Further, since the protrusion 65 moves in the axial direction A of the tube 1 with the first corner 65a as the head, the grinding member 26 can move smoothly in the axial direction A. Furthermore, since the protrusion 50 rotates with the second corner 65b as the head, the grinding member 26 can be smoothly rotated.

上記第５の実施の形態では、四角錐の突起６５を設けたが、四角錐に限定されるものではなく、例えば、三角錐や五角錐以上などの多角錐形状或いは円錐形状であってもよい。
以下の表１は、５種類（比較例１、実施例１〜実施例４）の研削部材２６，９１を用いて管１の内面を研削した評価を示す試験結果である。このうち、比較例１は、図１５に示すように、１個の研削部材９１の幅Ｅを５０ｍｍ、研削部材９１の取付数を２個、研削部材９１の幅Ｅの合計を１００ｍｍ（＝研削部材９１の幅Ｅ×個数）、砥石部９２の突起９３の形状を長方形状とし、両研削部材１０２間には、スペーサを設けず、スペースを形成していない。 In the fifth embodiment, the quadrangular pyramid projection 65 is provided, but the projection is not limited to a quadrangular pyramid, and may be a polygonal pyramid shape such as a triangular pyramid or a pentagonal pyramid or a conical shape, for example. .
Table 1 below shows the test results showing the evaluation of grinding the inner surface of the pipe 1 using five types of grinding members 26 and 91 (Comparative Example 1, Examples 1 to 4). Among them, in Comparative Example 1, as shown in FIG. 15, the width E of one grinding member 91 is 50 mm, the number of grinding members 91 is two, and the total width E of the grinding members 91 is 100 mm (= grinding). The width of the member 91 × the number) and the shape of the protrusion 93 of the grindstone 92 are rectangular, and no spacer is provided between the two grinding members 102, and no space is formed.

また、実施例１は、上記第１の実施の形態（図２参照）で示したように砥石部３２の突起４１の形状を山形状に形成したものであり、１個の研削部材２６の幅Ｅを２０ｍｍ、研削部材２６の取付数を３個とし、各スペーサ３４，３５を設けて各研削部材２６間にスペースを形成したものである。   Further, in Example 1, as shown in the first embodiment (see FIG. 2), the shape of the protrusion 41 of the grindstone portion 32 is formed in a mountain shape, and the width of one grinding member 26 is obtained. E is 20 mm, the number of mounting of the grinding members 26 is 3, and the spacers 34 and 35 are provided to form a space between the grinding members 26.

実施例２は上記第３の実施の形態（図６参照）で示したように砥石部３２の突起５０の形状を菱形状に形成したものである。
実施例３と実施例４とは上記第４の実施の形態（図１１参照）で示したように砥石部３２の突起６０の形状を長方形状に形成したものであり、実施例３と実施例４とでは、研削部材２６の幅Ｅと取付数とが異なっている。 In Example 2, as shown in the third embodiment (see FIG. 6), the shape of the protrusion 50 of the grindstone 32 is formed in a rhombus shape.
In Example 3 and Example 4, as shown in the fourth embodiment (see FIG. 11), the shape of the protrusion 60 of the grindstone portion 32 is formed in a rectangular shape. Example 3 and Example 4, the width E and the number of attachments of the grinding member 26 are different.

また、管１としては、口径１５０ｍｍで全長５ｍのダクタイル鋳鉄製の直管（ダクタイル鋳鉄管）であって、その内面に、１００ミクロンの鉄の酸化被膜が生成されたものを使用した。   The pipe 1 was a ductile cast iron straight pipe (ductile cast iron pipe) having a diameter of 150 mm and a total length of 5 m, on which an oxide film of 100 μm iron was formed on the inner surface.

評価としては、管１の内面の酸化被膜を完全に除去するまでに要した時間（以下、除去時間と言う）を比較例１および実施例１〜実施例４ごとに測定し、比較例１の除去時間を１として、実施例１〜実施例４の除去時間の比を記載した。   As an evaluation, the time required to completely remove the oxide film on the inner surface of the tube 1 (hereinafter referred to as the removal time) was measured for each of Comparative Example 1 and Examples 1 to 4, and With the removal time as 1, the ratio of the removal times of Examples 1 to 4 is described.

また、所定本数の管１の内面をそれぞれ一定時間研削し、次に、各管１の内面に粉体塗装を行って、膜厚が４００μｍの塗膜を形成した後、粉体塗装のピンホール検査を行ったときの不合格率を比較例１および実施例１〜実施例４ごとに測定し、比較例１の不合格率を１として、各実施例１〜実施例４の不合格率の比を記載した。   Further, the inner surfaces of a predetermined number of tubes 1 are ground for a certain time, and then powder coating is performed on the inner surfaces of each tube 1 to form a coating film having a film thickness of 400 μm. The failure rate when the inspection is performed is measured for each of Comparative Example 1 and Examples 1 to 4, and the failure rate of Comparative Example 1 is set to 1, and the failure rate of each of Examples 1 to 4 is measured. Ratios are listed.

また、上記粉体塗装のピンホール検査を行って合格した管１について、塗膜の密着力を測定し、比較例１の塗膜密着力を１として、実施例１〜実施例４の塗膜密着力の比を記載した。   Moreover, about the pipe 1 which passed the pinhole test | inspection of the said powder coating, the adhesive force of a coating film was measured, the coating film adhesive force of the comparative example 1 was set to 1, and the coating film of Example 1- Example 4 The ratio of adhesion was described.

下記表１によると、実施例１〜実施例４では、研削部材２６の幅Ｅの合計が比較例１よりも小さいが、スペーサ３４，３５を設けているため、摩擦熱の放散と研削屑の排出とが促進される。これにより、研削部材２６の研削性能の低下が防止され、実施例１〜実施例４の除去時間の比が１よりも小さくなり、比較例１よりも短時間で管１の内面の酸化被膜を完全に除去することができると考えられる。   According to Table 1 below, in Examples 1 to 4, the total width E of the grinding member 26 is smaller than that in Comparative Example 1, but since the spacers 34 and 35 are provided, the dissipation of frictional heat and the grinding dust Emissions are promoted. This prevents a decrease in the grinding performance of the grinding member 26, the ratio of the removal times of Examples 1 to 4 is smaller than 1, and the oxide film on the inner surface of the tube 1 is formed in a shorter time than Comparative Example 1. It is thought that it can be completely removed.

また、実施例４の研削部材２６の幅Ｅの合計は実施例３のものよりも小さいが、実施例４は実施例３と同じ評価が得られている。これは、実施例４は、実施例３よりも、各研削部材２６の幅Ｅが狭く且つスペーサ３４，３５の総数が多く、摩擦熱の放散と研削屑の排出とが促進されるためであると考えられる。   The total width E of the grinding member 26 of Example 4 is smaller than that of Example 3, but Example 4 has the same evaluation as Example 3. This is because, in the fourth embodiment, the width E of each grinding member 26 is narrower and the total number of the spacers 34 and 35 is larger than that in the third embodiment, and the dissipation of frictional heat and the discharge of grinding dust are promoted. it is conceivable that.

また、除去時間の比については、実施例１および実施例２が実施例３および実施例４よりも短くなっている。これについては、砥石部３２の突起４１の形状を山形状又は菱形状とすることによって、突起４１と管１の内面との接触面積が小さくなり、突起４１が管１の内面に接触するときの面圧が向上することで、研削性能が向上したためであると考えられる。   In addition, with respect to the ratio of the removal time, Example 1 and Example 2 are shorter than Example 3 and Example 4. About this, by making the shape of the protrusion 41 of the grindstone 32 into a mountain shape or a rhombus shape, the contact area between the protrusion 41 and the inner surface of the tube 1 is reduced, and the protrusion 41 comes into contact with the inner surface of the tube 1. It is thought that this is because the grinding performance was improved by improving the surface pressure.

また、塗膜密着力の比については、実施例１〜実施例４の全てが比較例１よりも大きな値になっており、実施例１〜実施例４における塗膜が、比較例１のものよりも、強固に管１の内面に固着している。尚、管１の内面に酸化スケールが残存していると、塗膜が酸化スケールの箇所から剥がれ易くなり、塗膜密着力が低下する。従って、上記のように塗膜密着力の比について実施例１〜実施例４が比較例１よりも大きな値になっているということは、管１の内面の酸化スケールを除去する性能に関して、実施例１〜実施例４が比較例１よりも優れていることを証明している。   Moreover, about the ratio of the coating film adhesion force, all of Examples 1 to 4 are larger than Comparative Example 1, and the coating films in Examples 1 to 4 are those of Comparative Example 1. Rather than being firmly fixed to the inner surface of the tube 1. In addition, when the oxide scale remains on the inner surface of the tube 1, the coating film is easily peeled off from the portion of the oxide scale, and the adhesion of the coating film is reduced. Therefore, as described above, Examples 1 to 4 have a larger value than that of Comparative Example 1 with respect to the ratio of the adhesion strength of the coating film, which means that the oxide scale on the inner surface of the tube 1 is removed. It is proved that Examples 1 to 4 are superior to Comparative Example 1.

Figure 0006192779
Figure 0006192779

上記各実施の形態では、図１に示すように、軸心方向Ａにおいて管１を固定し、管１に対して、研削部材２６を軸心方向Ａへ移動させながら管１の内面を研削したが、軸心方向Ａにおいて研削部材２６を固定し、研削部材２６に対して、管１を軸心方向Ａへ移動させながら管１の内面を研削してもよい。或いは、管１と研削部材２６とを共に軸心方向Ａにおいて互いに反対方向（接近離間方向）に移動することにより、管１の内面を研削してもよい。尚、管１を軸心方向Ａに移動させる場合は、例えば、支持装置１０を軸心方向Ａに移動可能な構造にすればよい。   In each of the above embodiments, as shown in FIG. 1, the tube 1 is fixed in the axial direction A, and the inner surface of the tube 1 is ground while moving the grinding member 26 in the axial direction A with respect to the tube 1. However, the inner surface of the tube 1 may be ground while fixing the grinding member 26 in the axial direction A and moving the tube 1 in the axial direction A with respect to the grinding member 26. Alternatively, the inner surface of the tube 1 may be ground by moving both the tube 1 and the grinding member 26 in directions opposite to each other in the axial direction A (approaching and separating directions). When the tube 1 is moved in the axial direction A, for example, the support device 10 may be configured to be movable in the axial direction A.

上記各実施の形態では、図４，図８，図１３に示すように、各孔３８は、スペーサ３４，３５と重複していないが、スペーサ３４，３５の一部分と重複して、各孔３８の一部分のみがスペーサ３４，３５で塞がれていてもよい。すなわち、各孔３８の全面がスペーサ３４，３５で塞がれていなければよい。   In each of the above embodiments, as shown in FIGS. 4, 8, and 13, each hole 38 does not overlap with the spacers 34, 35, but overlaps with a part of the spacers 34, 35 so as to overlap each hole 38. Only a part of these may be covered with spacers 34 and 35. That is, it is sufficient that the entire surface of each hole 38 is not blocked by the spacers 34 and 35.

上記各実施の形態では、研削部材２６、スペーサ３４，３５、砥石部３２、突起４１，５０，６０，６５の各個数等は図示されたものに限定されるものではない。また、ダクタイル鋳鉄製の管１を挙げたが、ダクタイル鋳鉄製に限定されるものではない。   In the above embodiments, the number of the grinding members 26, the spacers 34 and 35, the grindstone 32, the projections 41, 50, 60, and 65 are not limited to those illustrated. Moreover, although the duct 1 made of ductile cast iron was mentioned, it is not limited to the product made of ductile cast iron.

１ 管
２０ 研削装置
２４ 支軸
２６ 研削部材
３１ 台盤部
３２ 砥石部
３４ スペーサ
３８ 孔
４１，５０，６０，６５ 突起
５０ｂ 第１の角部
５０ｃ 第２の角部
５１ 案内面
５２ 研削屑
６５ａ 第１の角部
６５ｂ 第２の角部
Ａ 管の軸心方向
Ｂ 支軸の軸心方向
Ｊ 研削部材の回転方向 DESCRIPTION OF SYMBOLS 1 Pipe | tube 20 Grinding device 24 Support shaft 26 Grinding member 31 Base part 32 Grinding stone part 34 Spacer 38 Hole 41, 50, 60, 65 Protrusion 50b 1st corner | angular part 50c 2nd corner | angular part 51 Guide surface 52 Grinding waste 65a 1st 1 corner 65b 2nd corner A Axial direction B of the tube B Axial direction J of the spindle J Rotation direction of the grinding member

Claims (8)

管と研削部材との少なくとも一方を、他方に対して、管の軸心方向へ移動させながら管の内面を研削する研削装置であって、
複数の回転自在な研削部材が支軸に設けられ、
研削部材は、支軸に設けられた台盤部と、台盤部の外周に設けられた砥石部とを有し、
支軸の軸心方向において隣り合う研削部材の台盤部間にスペーサが設けられ、
支軸の軸心方向において貫通する孔が台盤部に形成され、
スペーサは孔を塞がないように構成されていることを特徴とする管の研削装置。 A grinding device for grinding an inner surface of a pipe while moving at least one of a pipe and a grinding member relative to the other in the axial direction of the pipe,
A plurality of rotatable grinding members are provided on the support shaft,
The grinding member has a base part provided on the spindle and a grindstone part provided on the outer periphery of the base part,
A spacer is provided between the base parts of the grinding members adjacent in the axial direction of the support shaft ,
A hole penetrating in the axial direction of the support shaft is formed in the platform,
The pipe grinding apparatus, wherein the spacer is configured not to block the hole . 台盤部とスペーサとは金属製であることを特徴とする請求項１に記載の管の研削装置。 2. The pipe grinding apparatus according to claim 1, wherein the base part and the spacer are made of metal . 砥石部は、台盤部の周方向において間隔をあけて複数設けられているとともに、台盤部の外周から径方向外側に突出していることを特徴とする請求項１又は請求項２に記載の管の研削装置。 The grindstone portion is provided with a plurality of intervals in the circumferential direction of the base plate portion, and protrudes radially outward from the outer periphery of the base plate portion. Pipe grinding equipment. 砥石部は、外周部に、山形状の突起を有していることを特徴とする請求項１から請求項３のいずれか１項に記載の管の研削装置。 The pipe grinding apparatus according to any one of claims 1 to 3, wherein the grindstone portion has a mountain-shaped protrusion on an outer peripheral portion . 砥石部は、外周部に、多角形状の突起を有していることを特徴とする請求項１から請求項３のいずれか１項に記載の管の研削装置。 The pipe grinding apparatus according to any one of claims 1 to 3, wherein the grindstone portion has a polygonal protrusion on an outer peripheral portion thereof. 突起は、支軸の軸心方向における端部に、角部を有していることを特徴とする請求項５に記載の管の研削装置。 The pipe grinding apparatus according to claim 5, wherein the protrusion has a corner at an end in the axial direction of the support shaft . 突起は、研削部材の回転方向における端部に、角部を有していることを特徴とする請求項５又は請求項６に記載の管の研削装置。 The pipe grinding apparatus according to claim 5 or 6, wherein the protrusion has a corner at an end in a rotation direction of the grinding member . 管と研削部材との少なくとも一方を、他方に対して、管の軸心方向へ移動させながら管の内面を研削する研削装置であって、
複数の回転自在な研削部材が支軸に設けられ、
研削部材は、支軸に設けられた台盤部と、台盤部の外周に設けられた砥石部とを有し、
台盤部は支軸の軸心方向において複数設けられ、
支軸の軸心方向において隣り合う研削部材の台盤部間にスペーサが設けられ、
砥石部は、外周部に、多角形状の突起を有し、
突起は研削屑を砥石部から台盤部間に案内する案内面を有していることを特徴とする管の研削装置。 A grinding device for grinding an inner surface of a pipe while moving at least one of a pipe and a grinding member relative to the other in the axial direction of the pipe,
A plurality of rotatable grinding members are provided on the support shaft,
The grinding member has a base part provided on the spindle and a grindstone part provided on the outer periphery of the base part,
A plurality of base parts are provided in the axial direction of the support shaft,
A spacer is provided between the base parts of the grinding members adjacent in the axial direction of the support shaft,
The grindstone has a polygonal protrusion on the outer periphery,
The projection has a guide surface for guiding the grinding waste between the grindstone portion and the base plate portion .
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4921689U (en) * 1972-05-27 1974-02-23
JPS60242902A (en) * 1984-05-17 1985-12-02 Yoshida Seisakusho:Kk Method for fixing cemented carbide in tool
JPS62277252A (en) * 1986-05-27 1987-12-02 Toshiba Corp Machining method of internal grinding
US5233791A (en) * 1992-03-02 1993-08-10 Mcqueen Jr Joe C Apparatus for grinding the internal surface of pipe
WO2013114527A1 (en) * 2012-01-30 2013-08-08 株式会社 ダイニチ Honing tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4921689U (en) * 1972-05-27 1974-02-23
JPS60242902A (en) * 1984-05-17 1985-12-02 Yoshida Seisakusho:Kk Method for fixing cemented carbide in tool
JPS62277252A (en) * 1986-05-27 1987-12-02 Toshiba Corp Machining method of internal grinding
US5233791A (en) * 1992-03-02 1993-08-10 Mcqueen Jr Joe C Apparatus for grinding the internal surface of pipe
WO2013114527A1 (en) * 2012-01-30 2013-08-08 株式会社 ダイニチ Honing tool

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