JP2007212188A

JP2007212188A - Method and jig for positioning work piece

Info

Publication number: JP2007212188A
Application number: JP2006030061A
Authority: JP
Inventors: Hisato Oka; 久人岡; Hiroshi Kubo; 博久保
Original assignee: Sumitomo Electric Sintered Alloy Ltd
Current assignee: Sumitomo Electric Sintered Alloy Ltd
Priority date: 2006-02-07
Filing date: 2006-02-07
Publication date: 2007-08-23

Abstract

<P>PROBLEM TO BE SOLVED: To enable a work piece which has three or more projection portions, spaced apart from another along the circumferential direction in the inner circumference, to be centered and positioned with high accuracy, and to improve the operability of inserting the work piece into a jig and enable above positioning to be carried out, without damaging the work piece. <P>SOLUTION: The positioning jig is equipped with a columnar jig 1 which has radial-direction positioning surfaces 2 and roll-off portions 3 disposed alternately along the circumferential direction on the outer circumference. The work piece 6 is inserted along the outer circumference of the columnar jig 1, from a position where the projection portions 7, such as teeth and the like, disposed on the work piece 6 correspond to the roll-off portions 3, and a wide space is assured between the projection portions 7 and the columnar jig 1. Then, the work piece 6 is rotated, until the projection portions 7 fit in the outer circumference of the radial-direction positioning surfaces 2 and is positioned by the radial-direction positioning surfaces 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、内周や外周に歯などの凸部を有するワーク、例えば、内歯歯車や外歯歯車などをセンタリングされた位置に円滑に傷付けずに位置決めするためのワークの位置決め方法と位置決め治具に関する。 The present invention relates to a workpiece positioning method and positioning jig for smoothly positioning a workpiece having convex portions such as teeth on the inner periphery and outer periphery, for example, an internal gear and an external gear without being damaged at a centered position. Concerning ingredients.

図７に示すように、外歯を有するインナーロータ１１と内歯を有するアウターロータ１２を偏心配置にして組み合わせた内接歯車ポンプのポンプロータ１０は、ポンプの吐出量を安定させるために、インナーロータ１１とアウターロータ１２間のチップクリアランスｇ（歯先間隙間）を規定範囲内に納めることが要求される。そのチップクリアランスｇは、アウターロータ１２の精度に左右されるところが大きい。アウターロータ１２はインナーロータ１１に比べると製造過程で変形し易く、その変形によってチップクリアランスｇが変動するからである。このため、歯数が偶数のアウターロータについては、全数の歯について対角位置にある歯の歯先間寸法（短径寸法）Ｄ_Ｓの良否を検査して管理することが行われている。 As shown in FIG. 7, a pump rotor 10 of an internal gear pump in which an inner rotor 11 having external teeth and an outer rotor 12 having internal teeth are combined in an eccentric arrangement is provided with an inner gear in order to stabilize the pump discharge amount. It is required to keep the tip clearance g (gap between teeth) between the rotor 11 and the outer rotor 12 within a specified range. The tip clearance g greatly depends on the accuracy of the outer rotor 12. This is because the outer rotor 12 is more easily deformed in the manufacturing process than the inner rotor 11, and the chip clearance g varies due to the deformation. Therefore, for the outer rotor of the number of teeth is even, have been made to manage inspect the quality of the addendum dimension between (short diameter) D _S of the tooth in a diagonal position for the teeth of the total number.

その検査を効率良く、正確に行うために、本出願人は全ての対角位置の歯先間寸法の良否を同時に判別する検査方法を開発した。その検査方法では、アウターロータを柱状ゲージの外周に嵌め、ゲージに設けたエアー孔にエアーを流す。そのエアーを、ゲージの外周面とそれに対面したアウターロータの歯先との間の隙間から流出させてその流量を測定し、予め求めた隙間の大きさとエアー流量の関係と照らして歯先間寸法の良否を判断する。 In order to perform the inspection efficiently and accurately, the applicant has developed an inspection method for simultaneously determining the quality of the inter-tooth dimension at all diagonal positions. In the inspection method, the outer rotor is fitted to the outer periphery of the columnar gauge, and air is allowed to flow through the air hole provided in the gauge. The air flows out from the gap between the outer peripheral surface of the gauge and the tooth tip of the outer rotor facing it, and the flow rate is measured. Judge the quality of the.

その方法を実施するときには、アウターロータを柱状ゲージの外周に嵌めて位置決めする必要があるが、検査精度を高めるためにゲージとアウターロータ間のクリアランスを可及的に小さくする（ほぼゼロにする）ので、ゲージに対するロータの挿入がし辛い。また、ロータが傾いた状態で挿入されたときにそのロータの内周面に擦り傷がついたり、エッジが傷ついたりする可能性もある。 When implementing this method, it is necessary to position the outer rotor by fitting it to the outer circumference of the columnar gauge, but to increase the inspection accuracy, the clearance between the gauge and the outer rotor is made as small as possible (substantially zero). Therefore, it is difficult to insert the rotor into the gauge. Further, when the rotor is inserted in an inclined state, the inner peripheral surface of the rotor may be scratched or the edge may be damaged.

ここで、下記特許文献１、２は、鋼管とその鋼管に内挿する部品を溶接するときに用いる溶接用位置決め治具を開示している。特許文献１の位置決め治具は、下治具に中央ギヤとその中央ギヤで制御するカム機構を設けている。この位置決め治具は、前記下治具の小径部の外周に部品をセットし、その後、下治具を鋼管に挿入し、カム機構の複数のカムを同期して展開させて鋼管の内側に押し付ける。これによって下治具が鋼管の中心に位置決めされ、鋼管と下治具で支えた部品が同軸上に位置決めされる。 Here, Patent Documents 1 and 2 below disclose a welding positioning jig used when welding a steel pipe and a component inserted into the steel pipe. In the positioning jig of Patent Document 1, a lower gear is provided with a central gear and a cam mechanism controlled by the central gear. In this positioning jig, parts are set on the outer periphery of the small-diameter portion of the lower jig, and then the lower jig is inserted into the steel pipe, and a plurality of cams of the cam mechanism are synchronously deployed and pressed inside the steel pipe. . As a result, the lower jig is positioned at the center of the steel pipe, and the parts supported by the steel pipe and the lower jig are coaxially positioned.

また、特許文献２の位置決め治具は、特許文献１が採用したカム機構に代えて径方向に進退する拘束腕を設け、その拘束腕を下治具に設けた中央ギヤとラックとピニオンで駆動して鋼管の内側に押し付けるようにしており、この点のみが特許文献１の治具と異なるものになっている。 In addition, the positioning jig of Patent Document 2 is provided with a restraining arm that advances and retreats in the radial direction instead of the cam mechanism employed in Patent Document 1, and the restraining arm is driven by a central gear, a rack, and a pinion provided on the lower jig. Thus, it is pressed against the inside of the steel pipe, and only this point is different from the jig of Patent Document 1.

ところが、特許文献１、２が開示している位置決め治具は、部品の心出し精度を高めようとすると下治具との間のクリアランスを小さくする必要があり、上述した挿入のし辛さの問題や挿入時の部品の傷つきの問題が発生する。 However, the positioning jigs disclosed in Patent Documents 1 and 2 require that the clearance between the positioning jig and the lower jig be reduced in order to increase the centering accuracy of the parts. Problems and problems of scratching parts during insertion occur.

一方、鋼管に対する下治具の心出しは、カム機構や類似の拘束腕を用いた機構を使用して行っており、その機構を用いれば挿入のし辛さや挿入時のワークの傷つきの問題を解消できるが、カム機構などを採用した治具は構造や操作が複雑になる。また、構造の複雑な機構は、その機構を構成する部品の加工精度が治具の性能に影響を及ぼし、位置決め精度を低下させる因子となる。
特開平６−３１４８８号公報特開平６−３１４８９号公報 On the other hand, the lower jig is centered with respect to the steel pipe using a mechanism using a cam mechanism or similar restraining arm, which can be difficult to insert and damage the workpiece during insertion. Although this can be eliminated, the structure and operation of a jig employing a cam mechanism is complicated. Further, in a mechanism having a complicated structure, the processing accuracy of the parts constituting the mechanism affects the performance of the jig, and becomes a factor that lowers the positioning accuracy.
JP-A-6-31488 JP-A-6-31489

量産品のポンプロータなどについては、膨大な数の検査を行う必要があるので、治具に対するワークの挿入性をスムーズに行うことが望まれる。また、不良発生率を下げるために、ワークを傷つけずに位置決めすることが望まれる。さらに、上述したアウターロータの歯先間寸法の良否検査などでは、高精度の位置決めが望まれる。そこで、この発明は、その３つの要求に同時に応えることを課題としている。 For mass-produced pump rotors and the like, since it is necessary to perform a huge number of inspections, it is desirable to smoothly insert the workpiece into the jig. It is also desirable to position the workpiece without damaging it in order to reduce the defect occurrence rate. Furthermore, high-accuracy positioning is desired in the above-described quality inspection of the inter-tooth dimension of the outer rotor. Therefore, the present invention has an object to meet the three requirements simultaneously.

上記の課題を解決するため、この発明においては、内周に３個以上の凸部が周方向に間隔をあけて設けられているワークについては、そのワークを、前記凸部が適合して嵌る径方向位置決め面と、前記凸部と前記径方向位置決め面との間より広い隙間をワークとの間に生じさせる逃げ部を外周に周方向に交互に設けた柱状治具の外側に、前記凸部が前記逃げ部と対応する位置で挿入し、その後、前記柱状治具とワークを前記凸部が前記径方向位置決め面の外周に嵌まるところまで相対回転させてワークを径方向位置決め面で位置決めするようにした。 In order to solve the above-described problems, in the present invention, for a workpiece having three or more convex portions provided on the inner periphery at intervals in the circumferential direction, the workpiece is fitted with the convex portion. On the outer side of the columnar jig, in which the circumferential positioning surfaces and the clearance portions that create a wider gap between the convex portion and the radial positioning surface between the workpiece and the outer periphery are alternately provided in the circumferential direction. The part is inserted at a position corresponding to the escape part, and then the columnar jig and the work are relatively rotated until the convex part fits on the outer periphery of the radial positioning surface to position the work on the radial positioning surface. I tried to do it.

また、外周に３個以上の凸部が周方向に間隔をあけて設けられているワークについては、前記径方向位置決め面と前記逃げ部が内周に周方向に交互に設けられた筒状治具を用いてその筒状治具の内側に前記凸部が前記逃げ部と対応する位置で挿入し、その後、筒状治具とワークを前記凸部が前記径方向位置決め面の外周に嵌まるところまで相対回転させてワークを径方向位置決め面で位置決めするようにした。 In addition, for a workpiece having three or more convex portions provided on the outer periphery at intervals in the circumferential direction, a cylindrical treatment in which the radial positioning surface and the relief portion are alternately provided on the inner periphery in the circumferential direction. Using the tool, the convex portion is inserted into the cylindrical jig at a position corresponding to the relief portion, and then the cylindrical jig and the workpiece are fitted on the outer periphery of the radial positioning surface. The workpiece was positioned on the radial positioning surface by relatively rotating it.

前者の方法で位置決めを行うときには、ワークの一面を支えるワーク支持部と、前記凸部の各々が嵌合する径方向位置決め面と、各凸部と前記径方向位置決め面との間より広い隙間をワークとの間にの間に生じさせる逃げ部を外周に周方向に交互に設けた柱状治具を有し、前記柱状治具が前記ワーク支持部のワーク支持面に対して垂直に設置され、この柱状治具の周囲に前記ワーク支持部が配置されている位置決め治具を使用する。 When positioning is performed by the former method, a workpiece supporting portion that supports one surface of the workpiece, a radial positioning surface to which each of the convex portions is fitted, and a wider gap between each convex portion and the radial positioning surface. It has a columnar jig that is alternately provided in the circumferential direction on the outer periphery with the escape portion that occurs between the workpiece, the columnar jig is installed perpendicular to the workpiece support surface of the workpiece support portion, A positioning jig in which the work support portion is disposed around the columnar jig is used.

また、後者の方法で位置決めを行うときには、前記柱状治具に代えて前記径方向位置決め面と前記逃げ部を内周に周方向に交互に設けた筒状治具を用い、その筒状治具がワーク支持部のワーク支持面に対して垂直に設置され、この筒状治具の内径側にワーク支持部が配置されている位置決め治具を使用する。 When positioning by the latter method, instead of the columnar jig, a cylindrical jig in which the radial positioning surface and the relief portion are alternately provided in the circumferential direction is used. Is used perpendicularly to the workpiece support surface of the workpiece support portion, and a positioning jig in which the workpiece support portion is disposed on the inner diameter side of the cylindrical jig is used.

この発明は、これらの位置決め治具も併せて提供する。なお、これらの位置決め治具には、径方向に位置決めされたワークを柱状治具や筒状治具に対して周方向に位置決めする周方向相対位置の位置決め部材を必要に応じてさらに設けることができる。 The present invention also provides these positioning jigs. These positioning jigs may be further provided with a positioning member at a circumferential relative position for positioning the workpiece positioned in the radial direction in the circumferential direction with respect to the columnar jig or the cylindrical jig, if necessary. it can.

この発明の位置決め方法によれば、柱状治具の外周、或いは、筒状治具の内周にワークの凸部との間に隙間を生じさせる逃げ部を設け、ワークの凸部がその逃げ部と対応した位置でワークを柱状治具や筒状治具に挿入するので、治具との間に広い隙間がある状態でワークを治具に挿入することができる。そのために、挿入が簡単になり、ワークに擦り傷などが付くこともなくなる。 According to the positioning method of the present invention, the relief portion that creates a gap between the outer periphery of the columnar jig or the inner periphery of the cylindrical jig and the convex portion of the workpiece is provided, and the convex portion of the workpiece is the relief portion. Since the workpiece is inserted into the columnar jig or the cylindrical jig at a position corresponding to the workpiece, the workpiece can be inserted into the jig with a wide gap between the workpiece and the jig. Therefore, the insertion becomes easy and the work is not scratched.

また、ワーク挿入後にワークと治具を相対回転させると、ワークの凸部が柱状又は筒状治具の径方向位置決め面の位置に移動してワークが径方向に位置決めされる。このとき、ワークと治具との間の隙間が徐々に狭くなって凸部がセンタリングされ、前記治具の径方向位置決め面を形成した部位に嵌るので、径方向位置決め面とワークとの間の隙間を可及的に小さくしても位置決めを支障なく行うことができ、前記隙間を小さくすることで径方向位置決め面による位置決め精度を高めることも可能になる。 Further, when the workpiece and the jig are relatively rotated after the workpiece is inserted, the convex portion of the workpiece moves to the position of the radial positioning surface of the columnar or cylindrical jig, and the workpiece is positioned in the radial direction. At this time, the gap between the workpiece and the jig is gradually narrowed so that the convex portion is centered and fits into the portion where the radial positioning surface of the jig is formed. Even if the gap is made as small as possible, positioning can be performed without any problem. By reducing the gap, the positioning accuracy by the radial positioning surface can be increased.

以下、この発明の位置決め方法と位置決め治具の実施の形態を添付図面の図１〜図６に基づいて説明する。 Embodiments of a positioning method and a positioning jig according to the present invention will be described below with reference to FIGS.

図１及び図２は、位置決め治具の一例の概要を表している。例示の位置決め治具は、内接歯車ポンプのアウターロータ（図２参照）をワーク６にしてセンタリングされたところに位置決めするものであって、柱状治具１とワーク支持部４を組み合わせて構成されている。 1 and 2 show an outline of an example of a positioning jig. The illustrated positioning jig is used to position the outer rotor (see FIG. 2) of the internal gear pump centered with the work 6, and is configured by combining the columnar jig 1 and the work support portion 4. ing.

柱状治具１には、径方向位置決め面２と逃げ部３が外周に周方向に交互に設けられている。径方向位置決め面２は、図２に示すワーク６の内周に設けられた凸部７（例示のワークは内歯）の各々に対応させて凸部７と同数設けられており、各径方向位置決め面２は、柱状治具１と同心の円上にある。また、逃げ部３は、中央が広くて周方向端部に向かって狭くなる隙間をワーク６との間に生じさせるものにしている。図の逃げ部３は、円の一部を周方向に飛び飛びに切り欠いて作り出しているが、隣り合う径方向位置決め面２、２間に、図３や図４に示すような凹部を設けて作り出したものであってもよい。 In the columnar jig 1, radial positioning surfaces 2 and relief portions 3 are alternately provided on the outer periphery in the circumferential direction. The radial positioning surface 2 is provided in the same number as the convex portion 7 corresponding to each of the convex portions 7 (the illustrated workpiece is an internal tooth) provided on the inner periphery of the workpiece 6 shown in FIG. The positioning surface 2 is on a circle concentric with the columnar jig 1. Further, the escape portion 3 has a gap between the workpiece 6 and a gap that is wide at the center and narrows toward the end in the circumferential direction. The relief portion 3 in the figure is created by cutting out a part of a circle in the circumferential direction, but a recess as shown in FIGS. 3 and 4 is provided between the adjacent radial positioning surfaces 2 and 2. It may be created.

例示の治具のワーク支持部４は定盤で形成されており、水平なワーク支持面５を有する。そのワーク支持面５は、起立させた柱状治具１の周囲を取り巻く位置に設けられており、このワーク支持面５でワーク６の一面を支える。 The workpiece support 4 of the illustrated jig is formed of a surface plate and has a horizontal workpiece support surface 5. The workpiece support surface 5 is provided at a position surrounding the upright columnar jig 1, and the workpiece support surface 5 supports one surface of the workpiece 6.

このように構成した位置決め治具は、凸部７が逃げ部３と対応する位置（図５の鎖線を参照）でワーク６を柱状治具１の外周に挿入し、その後、ワーク６を凸部７が径方向位置決め面２の外周に嵌るところ（図５の実線位置）まで回転させてワークを径方向位置決め面２で位置決めする。このときのワーク回転を、ワーク支持面５でワーク６の一面を支えて行うとワークが傾かず、凸部７が径方向位置決め面２の外周にスムーズに嵌る。ワーク６を回転させる代わりに柱状治具１を回転させてもよい。 In the positioning jig configured in this way, the workpiece 6 is inserted into the outer periphery of the columnar jig 1 at a position where the convex portion 7 corresponds to the escape portion 3 (see the chain line in FIG. 5), and then the workpiece 6 is projected to the convex portion. The workpiece is positioned on the radial positioning surface 2 by rotating to a position where 7 is fitted to the outer periphery of the radial positioning surface 2 (solid line position in FIG. 5). When the workpiece rotation at this time is performed by supporting one surface of the workpiece 6 with the workpiece support surface 5, the workpiece does not tilt, and the convex portion 7 fits smoothly on the outer periphery of the radial positioning surface 2. Instead of rotating the workpiece 6, the columnar jig 1 may be rotated.

この位置決め治具を使用すると、ワーク６を柱状治具の外周に挿入するときに凸部７と柱状治具１との間の隙間が広がるため、挿入性が向上して作業が楽になる。また、逃げ部３によって柱状治具１との間に作り出された隙間を徐々に狭めながら凸部７が径方向位置決め面２の外周に移動するので、センタリング時の干渉が回避されてワーク６に擦り傷などがつき難くなる。さらに、径方向位置決め面２とワークの凸部７との間の隙間を小さくしても作業性が悪くならないため、前記隙間を小さくして位置決めの精度を高めることも可能になる。 When this positioning jig is used, a gap between the convex portion 7 and the columnar jig 1 is widened when the workpiece 6 is inserted into the outer periphery of the columnar jig, so that the insertability is improved and the work is facilitated. Further, since the convex portion 7 moves to the outer periphery of the radial positioning surface 2 while gradually narrowing the gap created between the columnar jig 1 by the escape portion 3, interference during centering is avoided and the workpiece 6 is prevented. It becomes difficult to get scratches. Furthermore, since the workability does not deteriorate even if the gap between the radial positioning surface 2 and the convex portion 7 of the workpiece is reduced, it is possible to increase the positioning accuracy by reducing the gap.

なお、ワークは径方向だけでなく、周方向にも位置決めすることが要求される場合がある。そのときには、図５に示すような位置決め部材８を設けて柱状治具１との周方向の相対位置が定まった位置にワーク６を位置決めするとよい。位置決め部材８は、ワーク６が周方向に位置決めされた位置で凸部７などに接してそこからのワーク回転を規制するストッパピンなどでよく、それをワーク支持面５上に立設するなどしておけば周方向の位置決めも行える。 In some cases, it is required to position the workpiece not only in the radial direction but also in the circumferential direction. At that time, a positioning member 8 as shown in FIG. 5 may be provided to position the workpiece 6 at a position where the relative position in the circumferential direction with respect to the columnar jig 1 is determined. The positioning member 8 may be a stopper pin or the like that contacts the convex portion 7 or the like at a position where the workpiece 6 is positioned in the circumferential direction and regulates the rotation of the workpiece therefrom, and stands on the workpiece support surface 5. If so, positioning in the circumferential direction can also be performed.

この発明の位置決め方法及び位置決め治具は、外周に歯などの凸部を有するワークをセンタリング点に位置決めするときにも有効に利用できる。 The positioning method and positioning jig of the present invention can be effectively used when positioning a workpiece having a convex portion such as a tooth on the outer periphery at the centering point.

図６は、内接歯車ポンプのインナーロータをワークとして位置決めする例を示している。このときに用いる位置決め治具は、径方向位置決め面２と逃げ部３を内周に周方向に交互に設けた筒状治具１Ａと、ワーク支持部４を組み合わせたものにする。ワーク支持部４は筒状治具１Ａの内径側に配置し、そのワーク支持部４の上面、即ち、水平なワーク支持面５で筒状治具１Ａの内径側に挿入されたワーク６の一面を支える。逃げ部３は、柱状治具に設けた逃げ部と同様に、中央が広くて周方向端部に向かって狭くなる隙間をワーク６との間に生じさせるものにし、その逃げ部３と凸部７（図のそれはインナーロータの外歯）が対応した位置でワーク６を筒状治具１Ａの内側に嵌め、その後、凸部７が径方向位置決め面２の内側に嵌るところまでワーク６を回転させて径方向位置決め面２による位置決めを行う。 FIG. 6 shows an example in which the inner rotor of the internal gear pump is positioned as a workpiece. The positioning jig used at this time is a combination of the cylindrical jig 1A in which the radial positioning surface 2 and the relief portions 3 are alternately provided on the inner circumference in the circumferential direction, and the work support portion 4. The work support portion 4 is arranged on the inner diameter side of the cylindrical jig 1A, and the upper surface of the work support portion 4, that is, one surface of the work 6 inserted on the inner diameter side of the cylindrical jig 1A on the horizontal work support surface 5. Support. Like the escape portion provided in the columnar jig, the escape portion 3 creates a gap between the workpiece 6 and the clearance portion 3 that is wide at the center and narrows toward the end in the circumferential direction. 7 (the outer teeth of the inner rotor in the figure) correspond to the workpiece 6 fitted inside the cylindrical jig 1A, and then the workpiece 6 is rotated until the convex portion 7 fits inside the radial positioning surface 2 Thus, positioning by the radial positioning surface 2 is performed.

なお、ワークの高精度位置決めは、内歯歯車や外歯歯車の歯先間寸法の測定や良否検査を行うときだけでなく、内周や外周に凸部（歯、キー、スプラインなど）を有するワークの加工や自動組み立てなどを行うときにも要求されることがある。そのようなときにこの発明の方法、治具を使用すると効果的である。 Note that high-precision positioning of the workpiece has not only the measurement of the inter-tooth dimensions of the internal gear and external gear and the inspection of quality, but also convex portions (tooth, key, spline, etc.) on the inner and outer circumference It may also be required when performing workpiece machining or automatic assembly. In such a case, it is effective to use the method and jig of the present invention.

この発明の位置決め治具の一例の概要を示す斜視図The perspective view which shows the outline | summary of an example of the positioning jig of this invention 図１の位置決め治具の平面図Plan view of the positioning jig in FIG. 柱状治具の他の例を示す平面図Plan view showing another example of columnar jig 柱状治具のさらに他の例を示す平面図Plan view showing still another example of columnar jig 図１の位置決め治具による位置決め方法を示す平面図FIG. 1 is a plan view showing a positioning method using the positioning jig of FIG. 筒状治具を有する位置決め治具の一例を示す平面図A plan view showing an example of a positioning jig having a cylindrical jig 位置決めされるワークの一例（ポンプロータ）を示す平面図Plan view showing an example of a workpiece to be positioned (pump rotor)

符号の説明Explanation of symbols

１柱状治具
１Ａ筒状治具
２径方向位置決め面
３逃げ部
４ワーク支持部
５ワーク支持面
６ワーク
７凸部
８位置決め部材 DESCRIPTION OF SYMBOLS 1 Columnar jig 1A Cylindrical jig 2 Radial direction positioning surface 3 Escape part 4 Work support part 5 Work support surface 6 Work 7 Convex part 8 Positioning member

Claims

内周に３個以上の凸部（７）が周方向に間隔をあけて設けられているワーク（６）を、
前記凸部（７）が適合して嵌る径方向位置決め面（２）と、前記凸部（７）と前記径方向位置決め面（２）との間より広い隙間をワークとの間に生じさせる逃げ部（３）を外周に周方向に交互に設けた柱状治具（１）の外側に、前記凸部（７）が前記逃げ部（３）と対応する位置で挿入し、
その後、前記柱状治具（１）とワーク（６）を前記凸部（７）が前記径方向位置決め面（２）の外周に嵌まるところまで相対回転させてワーク（６）を前記径方向位置決め面（２）で位置決めするワークの位置決め方法。 A work (6) in which three or more convex portions (7) are provided on the inner periphery at intervals in the circumferential direction,
The clearance which makes the said radial direction positioning surface (2) which the said convex part (7) fits, and the clearance gap wider between a said convex part (7) and the said radial direction positioning surface (2) generate | occur | produce between workpieces. Inserting the convex part (7) at the position corresponding to the relief part (3) on the outside of the columnar jig (1) provided with the parts (3) alternately in the circumferential direction on the outer periphery,
Thereafter, the columnar jig (1) and the workpiece (6) are relatively rotated until the convex portion (7) fits on the outer periphery of the radial positioning surface (2), thereby positioning the workpiece (6) in the radial positioning. Positioning method for workpieces positioned on surface (2).

外周に３個以上の凸部（７）が周方向に間隔をあけて設けられているワーク（６）を、
前記凸部（７）が適合して嵌る径方向位置決め面（２）と、前記凸部（７）と前記径方向位置決め面（２）との間より広い隙間をワークとの間に生じさせる逃げ部（３）を内周に周方向に交互に設けた筒状治具（１Ａ）の内側に、前記凸部（７）が前記逃げ部（３）と対応する位置で挿入し、
その後、前記筒状治具（１Ａ）とワーク（６）を前記凸部（７）が前記径方向位置決め面（２）の内周に嵌まるところまで相対回転させてワークを前記径方向位置決め面（２）で位置決めするワークの位置決め方法。 A workpiece (6) provided with three or more convex portions (7) on the outer periphery at intervals in the circumferential direction,
The clearance which makes the said radial direction positioning surface (2) which the said convex part (7) fits, and the clearance gap wider between the said convex part (7) and the said radial direction positioning surface (2) generate | occur | produce between a workpiece | work. The convex part (7) is inserted into the inner side of the cylindrical jig (1A) alternately provided in the circumferential direction with the part (3) at a position corresponding to the relief part (3),
Thereafter, the cylindrical jig (1A) and the workpiece (6) are relatively rotated until the convex portion (7) fits on the inner periphery of the radial positioning surface (2), thereby moving the workpiece to the radial positioning surface. Positioning method of the workpiece to be positioned in (2).

内周に３個以上の凸部（７）が周方向に間隔をあけて設けられているワーク（６）の一面を支えるワーク支持部（４）と、
前記凸部（７）の各々が嵌合する径方向位置決め面（２）と、各凸部（７）と前記径方向位置決め面（２）との間より広い隙間をワークとの間に生じさせる逃げ部（３）を外周に周方向に交互に設けた柱状治具（１）を有し、
前記柱状治具（１）が前記ワーク支持部（４）のワーク支持面（５）に対して垂直に設置され、この柱状治具（１）の周囲に前記ワーク支持部（４）が配置されているワークの位置決め治具。 A workpiece support portion (4) that supports one surface of a workpiece (6) having three or more convex portions (7) provided on the inner periphery at intervals in the circumferential direction;
The radial positioning surface (2) to which each of the convex portions (7) fits, and a wider gap between the convex portion (7) and the radial positioning surface (2) is generated between the workpiece. Having columnar jigs (1) in which escape portions (3) are alternately provided in the circumferential direction on the outer periphery;
The columnar jig (1) is installed perpendicular to the workpiece support surface (5) of the workpiece support (4), and the workpiece support (4) is disposed around the columnar jig (1). The workpiece positioning jig.

外周に３個以上の凸部（７）が周方向に間隔をあけて設けられているワーク（６）の一面を支えるワーク支持部（４）と、
前記凸部（７）の各々が嵌合する径方向位置決め面（２）と、各凸部（７）と前記径方向位置決め面（２）との間より広い隙間をワークとの間に生じさせる逃げ部（３）を内周に周方向に交互に設けた筒状治具（１Ａ）を有し、
前記筒状治具（１Ａ）が前記ワーク支持部（４）のワーク支持面（５）に対して垂直に設置され、この筒状治具（１Ａ）の内径側に前記ワーク支持部（４）が配置されているワークの位置決め治具。 A workpiece support portion (4) for supporting one surface of a workpiece (6) having three or more convex portions (7) provided on the outer periphery at intervals in the circumferential direction;
A radial clearance surface (2) to which each of the convex portions (7) is fitted, and a wider gap between each convex portion (7) and the radial positioning surface (2) are generated between the workpiece. It has a cylindrical jig (1A) in which escape portions (3) are alternately provided in the circumferential direction on the inner periphery,
The cylindrical jig (1A) is installed perpendicularly to the work support surface (5) of the work support (4), and the work support (4) is provided on the inner diameter side of the cylindrical jig (1A). Positioning jig for the workpiece where is placed.

径方向に位置決めされたワーク（６）を柱状治具（１）又は筒状治具（１Ａ）に対して周方向に位置決めする周方向相対位置の位置決め部材（８）をさらに設けた請求項３又は４に記載のワークの位置決め治具。 The positioning member (8) at a circumferential relative position for positioning the workpiece (6) positioned in the radial direction in the circumferential direction with respect to the columnar jig (1) or the cylindrical jig (1A) is further provided. Or the workpiece positioning jig of 4.