JP2017090199A - Measurement device and measurement method - Google Patents

Measurement device and measurement method Download PDF

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JP2017090199A
JP2017090199A JP2015219585A JP2015219585A JP2017090199A JP 2017090199 A JP2017090199 A JP 2017090199A JP 2015219585 A JP2015219585 A JP 2015219585A JP 2015219585 A JP2015219585 A JP 2015219585A JP 2017090199 A JP2017090199 A JP 2017090199A
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contact
reference line
movable member
measurement
displacement meter
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JP6686376B2 (en
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将司 河本
Shoji Kawamoto
将司 河本
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JTEKT Corp
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  • A Measuring Device Byusing Mechanical Method (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

PROBLEM TO BE SOLVED: To reduce measurement errors as much as possible in measurement devices measuring diameters of cylindrical works.SOLUTION: A measurement device 10 includes a first probe 11 and second probe 12 that are present at a line symmetric layout with a reference line L0 as an axis and a third probe 13 that is located on the reference line L0, and brings the probes 11, 12 and 13 into contact with a trajectory 5 of an inner wheel 4 to be installed with one point Q on the reference line L0 as a center to thereby measure a diameter D in the trajectory 5. The measurement device 10 comprises: a movable member 20 that loads the third probe 13; guide members 31 and 32 that guide the movable member 20 along the reference line L0; an elastic member 25 that urges the movable member 20 in a direction parallel with the reference line L0 and thereby presses the third probe 13 against the trajectory 5; and a first displacement meter 41 and second displacement meter 42 that measure an amount of displacement of the movable member 20 with two positions becoming linearly symmetric relative to an axis of the reference line L0 of the movable member 20 as measurement positions P11 and P12.SELECTED DRAWING: Figure 1

Description

本発明は、測定装置及び測定方法に関するものであり、例えば、転がり軸受用の軌道輪の軌道における直径を測定するための装置及び方法に関する。   The present invention relates to a measuring apparatus and a measuring method, for example, an apparatus and a method for measuring a diameter of a raceway for a rolling bearing.

例えば玉軸受の内輪の外周面に形成されている軌道は、断面が円弧状の溝として形成されており、この溝の最小径、つまり、溝底位置における直径を計測して、加工寸法の確認（検査）等が行われる（例えば、特許文献１参照）。
このような計測を行う装置として、次のようなものが知られている。図８に示すように、測定装置は、第一接触子９１、第二接触子９２、第三接触子９３、この第三接触子９３を搭載している可動部材９４、可動部材９４を基準線Ｌ０に沿って誘導するガイド部材９５、第三接触子９３を軌道９８に押し付けるための弾性部材（圧縮ばね）９６、及び、変位計９７を有している。 For example, the raceway formed on the outer peripheral surface of the inner ring of the ball bearing is formed as a groove having an arc-shaped cross section, and the minimum diameter of this groove, that is, the diameter at the groove bottom position is measured to confirm the machining dimensions. (Inspection) and the like are performed (see, for example, Patent Document 1).
The following devices are known as devices for performing such measurement. As shown in FIG. 8, the measuring apparatus includes a first contact 91, a second contact 92, a third contact 93, a movable member 94 on which the third contact 93 is mounted, and the movable member 94 as a reference line. A guide member 95 that is guided along L0, an elastic member (compression spring) 96 for pressing the third contactor 93 against the track 98, and a displacement meter 97 are provided.

軌道９８の直径Ｄを測定するために、三つの接触子９１，９２，９３を軌道９８に接触させた状態とする。第一接触子９１及び第二接触子９２は、基準線Ｌ０を軸として線対称の配置にあり、装置基台に固定されているのに対して、第三接触子９３は基準線Ｌ０に沿って移動可能となっている。そこで、第三接触子９３を搭載している可動部材９４の移動量が変位計９７によって計測され、その計測値に基づいて軌道９８の溝底位置における直径Ｄが求められる。   In order to measure the diameter D of the track 98, the three contacts 91, 92, 93 are brought into contact with the track 98. The first contactor 91 and the second contactor 92 are arranged symmetrically with respect to the reference line L0 and are fixed to the apparatus base, whereas the third contactor 93 is along the reference line L0. Can be moved. Therefore, the displacement of the movable member 94 on which the third contactor 93 is mounted is measured by the displacement meter 97, and the diameter D at the groove bottom position of the track 98 is obtained based on the measured value.

直径Ｄを求める処理では、寸法が既知である内輪（ワークマスタ）を対象として可動部材９４の移動量が変位計９７により既に求められている。そして、加工済みの内輪９９を実際の測定対象として可動部材９４の移動量を変位計９７により求め、ワークマスタによる計測値を基準とし、実際の測定対象である内輪９９の計測値に基づいて、軌道９８の直径Ｄが求められる。   In the process of obtaining the diameter D, the displacement amount of the movable member 94 has already been obtained by the displacement meter 97 for the inner ring (work master) whose dimensions are known. Then, the amount of movement of the movable member 94 is obtained by the displacement meter 97 with the processed inner ring 99 as an actual measurement object, and based on the measurement value of the inner ring 99 that is the actual measurement object, based on the measurement value by the work master, The diameter D of the track 98 is determined.

特開２００６−４７０６０号公報（図２参照）JP 2006-47060 A (see FIG. 2)

図８に示すガイド部材９５は、直線レールと、この直線レールと可動部材９４との間に介在する複数のボールとを有しており、複数のボールが転動することで、可動部材９４を直線レールに沿って移動させる構成となっている。可動部材９４をスムーズに移動させるためには、ガイド部材９５を構成する各部材間には僅かであるが隙間が形成されている。このため、内輪９９に測定荷重を付与するために弾性部材９６が可動部材９４を押すと、図９に示すように、軌道９８に対する第三接触子９３の接触位置を中心として可動部材９４が僅かに回転し、可動部材９４が基準線Ｌ０に対して微小角度について傾いた状態となる場合がある。なお、図９では、説明をわかりやすくするために可動部材９４の傾きを実際の場合よりも大きく記載している。   The guide member 95 shown in FIG. 8 has a straight rail and a plurality of balls interposed between the straight rail and the movable member 94, and the plurality of balls roll to move the movable member 94. It is configured to move along a straight rail. In order to move the movable member 94 smoothly, a small gap is formed between the members constituting the guide member 95. For this reason, when the elastic member 96 pushes the movable member 94 in order to apply the measurement load to the inner ring 99, the movable member 94 is slightly centered around the contact position of the third contactor 93 with respect to the track 98 as shown in FIG. And the movable member 94 may be inclined at a minute angle with respect to the reference line L0. In FIG. 9, the inclination of the movable member 94 is shown larger than the actual case for easy understanding.

図９に示す状態では、変位計９７の計測値には、可動部材９４の基準線Ｌ０方向についての実際の変位量の他に可動部材９４の傾きに起因する誤差δが含まれ、この結果、軌道９８の直径Ｄに測定誤差が生じるという問題点がある。
なお、以上の説明は、測定対象が玉軸受の内輪９９となる場合であるが、玉軸受の外輪の内周面に形成されている軌道を計測する場合も同様である。つまり、外輪の場合、測定装置では、三つの接触子を外輪の軌道に対して径方向内側から接触させる構成となるが、この場合においても、測定荷重を作用させることでガイド部材９５に対する可動部材９４の直進性が不安定になると、変位計９７が実際の移動量に追従せず測定誤差が生じるという同様の問題点がある。 In the state shown in FIG. 9, the measured value of the displacement meter 97 includes an error δ due to the inclination of the movable member 94 in addition to the actual displacement amount of the movable member 94 in the reference line L0 direction. There is a problem that a measurement error occurs in the diameter D of the track 98.
The above explanation is for the case where the measurement target is the inner ring 99 of the ball bearing, but the same applies to the case where the track formed on the inner peripheral surface of the outer ring of the ball bearing is measured. That is, in the case of the outer ring, the measuring device has a configuration in which the three contactors are brought into contact with the outer ring raceway from the inner side in the radial direction. In this case, the movable member with respect to the guide member 95 can be applied by applying a measurement load. If the straightness of 94 becomes unstable, there is a similar problem that the displacement meter 97 does not follow the actual movement amount and a measurement error occurs.

そこで、本発明は、たとえガイド部材に対する可動部材の直進性が不安定となっていても、測定誤差を可及的に低減することが可能となる測定装置及び測定方法を提供することを目的とする。   Therefore, an object of the present invention is to provide a measuring apparatus and a measuring method capable of reducing a measurement error as much as possible even if the straightness of the movable member with respect to the guide member is unstable. To do.

本発明は、基準線を軸として線対称の配置にある第一接触子及び第二接触子と、前記基準線上に位置する第三接触子とを有し、前記基準線上の一点を中心として設置する円筒ワークの外周面及び内周面の内のいずれか一方の測定対象面に、当該第一接触子、当該第二接触子及び当該第三接触子を接触させることで、当該測定対象面における直径の測定を行うための測定装置であって、前記第三接触子を搭載している可動部材と、前記可動部材を前記基準線に沿って誘導するガイド部材と、前記可動部材を前記基準線に平行な方向に付勢して前記第三接触子を前記測定対象面に押し付けるための弾性部材と、前記可動部材の内の前記基準線を軸として線対称となる二つの位置を計測位置として当該可動部材の変位量を計測する第一変位計及び第二変位計と、を備えている。   The present invention has a first contact and a second contact in a line-symmetric arrangement with respect to a reference line, and a third contact located on the reference line, and is installed around one point on the reference line By bringing the first contact, the second contact, and the third contact into contact with either one of the outer peripheral surface and the inner peripheral surface of the cylindrical workpiece, A measuring device for measuring a diameter, wherein a movable member on which the third contactor is mounted, a guide member for guiding the movable member along the reference line, and the movable member on the reference line An elastic member for urging the third contactor against the surface to be measured by urging in a direction parallel to the surface to be measured, and two positions that are axisymmetric about the reference line in the movable member as measurement positions A first displacement meter for measuring a displacement amount of the movable member and a second displacement meter; Is provided with a displacement meter, a.

この測定装置は、可動部材の変位量を計測するために、基準線を軸として線対称となる二つの位置を計測位置とする第一変位計及び第二変位計を備えている。このため、ガイド部材に対する可動部材の直進性が不安定となっていて、可動部材が、測定対象面に対する第三接触子の接触位置を中心として回転し、前記基準線に対して傾いた状態となったとしても、第一変位計の計測値及び第二変位計の計測値を用いて補正することで可動部材の変位量をより正確に求めることができ、測定対象面における直径の測定誤差を可及的に低減することが可能となる。   In order to measure the displacement amount of the movable member, this measuring apparatus includes a first displacement meter and a second displacement meter whose measurement positions are two positions that are symmetrical with respect to a reference line. For this reason, the linearity of the movable member with respect to the guide member is unstable, and the movable member rotates around the contact position of the third contactor with respect to the measurement target surface and is inclined with respect to the reference line. Even if it becomes, the displacement amount of the movable member can be obtained more accurately by correcting using the measurement value of the first displacement meter and the measurement value of the second displacement meter, and the measurement error of the diameter on the measurement target surface can be calculated. It becomes possible to reduce as much as possible.

また、前記測定装置は、前記第一変位計及び前記第二変位計の計測値の平均値を求める演算装置を、更に備えているのが好ましい。
この場合、前記補正の処理として、第一変位計及び第二変位計の計測値の平均値が求められる。 Moreover, it is preferable that the said measuring apparatus is further provided with the calculating apparatus which calculates | requires the average value of the measured value of said 1st displacement meter and said 2nd displacement meter.
In this case, as the correction process, an average value of the measurement values of the first displacement meter and the second displacement meter is obtained.

また、前記演算装置は、前記平均値及びワークマスタの測定対象面における直径を用いて前記円筒ワークの測定対象面における直径を求めるのが好ましい。
この場合、寸法（測定対象面における直径）が既知であるワークマスタとの比較によって、円筒ワークの測定対象面における直径を求めることができる。 Moreover, it is preferable that the said arithmetic unit calculates | requires the diameter in the measuring object surface of the said cylindrical workpiece using the average value and the diameter in the measuring object surface of a workpiece | work master.
In this case, the diameter of the cylindrical workpiece on the measurement target surface can be determined by comparison with a work master whose dimensions (diameter on the measurement target surface) are known.

また、前記弾性部材は、前記可動部材の内の前記基準線を軸として線対称となる二つの押圧位置を押すために、当該基準線を挟んで両側にそれぞれ設けられているのが好ましい。
この場合、可動部材が基準線に平行な方向に押されやすくなり、可動部材の傾きを可及的に抑えることが可能となる。 The elastic members are preferably provided on both sides of the reference line so as to press two pressing positions that are symmetrical with respect to the reference line of the movable member.
In this case, the movable member is easily pushed in a direction parallel to the reference line, and the inclination of the movable member can be suppressed as much as possible.

また、本発明は、基準線を軸として線対称の配置にある第一接触子及び第二接触子と、前記基準線上に位置する第三接触子とを、前記基準線上の一点を中心として設置する円筒ワークの外周面及び内周面の内のいずれか一方の測定対象面に接触させることで、当該測定対象面における直径を測定するための方法であって、前記第三接触子を搭載する可動部材をガイド部材により前記基準線に平行な方向に誘導して当該第三接触子を前記測定対象面に接触させ、更に、当該第三接触子を当該測定対象面に押し付けると共に、前記第一接触子及び前記第二接触子を、前記測定対象面に接触させた状態とする工程と、前記可動部材の内の前記基準線を軸として線対称となる二つの位置を計測位置として当該可動部材の変位量を計測する工程と、前記測定対象面における直径を求めるために、前記二つの計測位置における前記変位量の平均値を求める工程と、を備えている。   In the present invention, the first contact and the second contact that are arranged symmetrically with respect to the reference line as an axis, and the third contact located on the reference line are installed around a point on the reference line. A method for measuring a diameter of a measurement target surface by contacting either one of an outer peripheral surface and an inner peripheral surface of the cylindrical workpiece, and mounting the third contact The movable member is guided by a guide member in a direction parallel to the reference line to bring the third contact into contact with the measurement target surface, and the third contact is pressed against the measurement target surface, and the first contact A step of bringing the contactor and the second contactor into contact with the surface to be measured; and two positions that are line-symmetric with respect to the reference line of the movable member as the measurement position. Measuring the amount of displacement of To determine the diameter in the constant target surface, and a, a step of determining the average value of the displacement amount in the two measurement positions.

この測定方法によれば、可動部材の変位量を計測するために、基準線を軸として線対称となる二つの位置を計測位置として可動部材の変位量を計測し、これらの変位量の平均値を求めている。このため、ガイド部材に対する可動部材の直進性が不安定となっていて、可動部材が、測定対象面に対する第三接触子の接触位置を中心として回転し、前記基準線に対して傾いた状態となったとしても、前記二つの計測位置における計測値を平均化することで可動部材の変位量をより正確に求めることができ、測定対象面における直径の測定誤差を可及的に低減することが可能となる。   According to this measuring method, in order to measure the amount of displacement of the movable member, the amount of displacement of the movable member is measured with two positions that are symmetrical about the reference line as the measurement position, and the average value of these amounts of displacement is measured. Seeking. For this reason, the linearity of the movable member with respect to the guide member is unstable, and the movable member rotates around the contact position of the third contactor with respect to the measurement target surface and is inclined with respect to the reference line. Even if it becomes, the amount of displacement of the movable member can be obtained more accurately by averaging the measurement values at the two measurement positions, and the measurement error of the diameter on the measurement target surface can be reduced as much as possible. It becomes possible.

本発明によれば、可動部材の変位量をより正確に求めることができ、測定対象面における直径の測定誤差を可及的に低減することが可能となる。これにより、円筒ワークを含む製品の精度を向上させることができる。   According to the present invention, the displacement amount of the movable member can be obtained more accurately, and the measurement error of the diameter on the measurement target surface can be reduced as much as possible. Thereby, the precision of the product containing a cylindrical workpiece can be improved.

測定装置の実施の一形態の概略を示す平面図である。It is a top view which shows the outline of one Embodiment of a measuring apparatus. 図１に示す測定装置を横から見た断面図である。It is sectional drawing which looked at the measuring apparatus shown in FIG. 1 from the side. 測定方法を説明するフローチャート図である。It is a flowchart figure explaining a measuring method. 測定方法に含まれる工程を説明するための測定装置の概略図である。It is the schematic of the measuring device for demonstrating the process included in the measuring method. 測定方法に含まれる工程を説明するための測定装置の概略図である。It is the schematic of the measuring device for demonstrating the process included in the measuring method. 測定の対象を外輪とする場合の測定装置の平面図である。It is a top view of a measuring device in case a measuring object is an outer ring. 図６に示す測定装置を横から見た断面図である。It is sectional drawing which looked at the measuring apparatus shown in FIG. 6 from the side. 従来の測定装置の概略図である。It is the schematic of the conventional measuring apparatus. 従来の測定装置の概略図である。It is the schematic of the conventional measuring apparatus.

以下、本発明の実施の形態を図面に基づいて説明する。
〔測定装置について〕
図１は、測定装置の実施の一形態の概略を示す平面図である。図２は、図１に示す測定装置を横から見た断面図である。この測定装置１０は、円筒ワークの外周面及び内周面の内のいずれか一方（の一部）を測定対象面としており、この測定対象面における直径を測定するためのものである。図１及び図２に示す測定装置１０は、円筒ワークの外周面の直径を測定する場合の装置であり、特に本実施形態では、円筒ワークは玉軸受用の内輪４であり、この内輪４の外周面に形成されている軌道５の直径Ｄを計測するためのものである。玉軸受の内輪４の軌道５は、断面が円弧状の溝として形成されていることから、この溝の最小径、つまり、溝底位置における直径Ｄを計測する。つまり、軌道５を測定対象面としている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[About measuring equipment]
FIG. 1 is a plan view showing an outline of an embodiment of a measuring apparatus. 2 is a cross-sectional view of the measuring apparatus shown in FIG. 1 as viewed from the side. This measuring device 10 uses one (a part) of an outer peripheral surface and an inner peripheral surface of a cylindrical workpiece as a measurement target surface, and is for measuring a diameter on the measurement target surface. The measuring device 10 shown in FIGS. 1 and 2 is a device for measuring the diameter of the outer peripheral surface of a cylindrical workpiece. In particular, in this embodiment, the cylindrical workpiece is an inner ring 4 for ball bearings. This is for measuring the diameter D of the track 5 formed on the outer peripheral surface. Since the raceway 5 of the inner ring 4 of the ball bearing is formed as an arc-shaped groove, the minimum diameter of this groove, that is, the diameter D at the groove bottom position is measured. That is, the track 5 is the measurement target surface.

測定装置１０は、第一接触子１１、第二接触子１２、第三接触子１３、可動部材２０、ガイド部材３１，３２、弾性部材２５、第一変位計４１、及び第二変位計４２を備えている。さらに、測定装置１０は、作業台上に設置される装置基台９、及びこの装置基台９に固定されている固定部材１９を備えている。また、測定装置１０は、ワーク受け部３８、及び演算装置１５を備えている。   The measuring device 10 includes a first contact 11, a second contact 12, a third contact 13, a movable member 20, guide members 31 and 32, an elastic member 25, a first displacement meter 41, and a second displacement meter 42. I have. Further, the measuring apparatus 10 includes an apparatus base 9 installed on the work table, and a fixing member 19 fixed to the apparatus base 9. In addition, the measuring apparatus 10 includes a work receiving unit 38 and an arithmetic device 15.

装置基台９は平板状の部材であり、この上に前記各機器が設けられている。
固定部材１９は、装置基台９に固定されており、固定ブロック１９ａと、固定ブロック１９ａから基準線Ｌ０に平行な方向に延びている複数のロッド１９ｂとを有している。
なお、この測定装置１０では、基準線Ｌ０が定義されている。図１において、基準線Ｌ０は、第一接触子１１と軌道５との接触点及び第二接触子１２と軌道５との接触点を結ぶ線分の垂直二等分線であって、装置基台９の面方向に平行な直線（本実施形態では水平方向の直線）である。この基準線Ｌ０は、各機器の配置及び測定対象となる内輪４の位置の基準になる。後の測定方法においても説明するが、基準線Ｌ０上の一点Ｑと内輪４の中心（中心点Ｃ）とを一致させて、内輪４をこの測定装置１０に設置することで、軌道５の直径Ｄの測定が行われる。 The device base 9 is a flat plate member on which the devices are provided.
The fixing member 19 is fixed to the apparatus base 9 and includes a fixing block 19a and a plurality of rods 19b extending from the fixing block 19a in a direction parallel to the reference line L0.
In the measurement apparatus 10, a reference line L0 is defined. In FIG. 1, a reference line L0 is a perpendicular bisector connecting a contact point between the first contactor 11 and the track 5 and a contact point between the second contactor 12 and the track 5. A straight line parallel to the surface direction of the table 9 (in this embodiment, a straight line in the horizontal direction). The reference line L0 serves as a reference for the arrangement of the devices and the position of the inner ring 4 to be measured. As will be described later, the diameter of the track 5 is set by aligning the point Q on the reference line L0 with the center of the inner ring 4 (center point C) and installing the inner ring 4 in the measuring device 10. D is measured.

ワーク受け部３８は、内輪４を下から支持するためのものであり、内輪４を載せる水平梁部３８ａと、この水平梁部３８ａを支える柱部３８ｂとを有している。水平梁部３８ａは、平面視においてＹ字形状を有しており、その上面に内輪４を載せることができる。水平梁部３８ａの上面（載置面）は、基準線Ｌ０と平行であり、水平面を構成している。柱部３８ｂは装置基台９に取り付けられており水平梁部３８ａを支えている。   The workpiece receiving portion 38 is for supporting the inner ring 4 from below, and has a horizontal beam portion 38a on which the inner ring 4 is placed and a column portion 38b that supports the horizontal beam portion 38a. The horizontal beam portion 38a has a Y shape in plan view, and the inner ring 4 can be placed on the upper surface thereof. The upper surface (mounting surface) of the horizontal beam portion 38a is parallel to the reference line L0 and forms a horizontal plane. The column part 38b is attached to the apparatus base 9, and supports the horizontal beam part 38a.

第一接触子１１及び第二接触子１２は、それぞれ装置基台９に固定されている支持部材１４に取り付けられており、これら接触子１１，１２は同じ高さに位置しており、平面視において（図１参照）基準線Ｌ０を軸として線対称の配置にある。第一接触子１１及び第二接触子１２は玉形状を有しており、ワーク受け部３８上に載る内輪４の軌道５と点接触する。   The first contactor 11 and the second contactor 12 are respectively attached to a support member 14 fixed to the apparatus base 9, and these contacts 11 and 12 are located at the same height, and are viewed in plan view. (See FIG. 1), the line is symmetrical about the reference line L0. The first contactor 11 and the second contactor 12 have a ball shape, and make point contact with the track 5 of the inner ring 4 placed on the work receiving portion 38.

装置基台９上において、第一接触子１１及び第二接触子１２は固定状態にあるのに対して、第三接触子１３は移動可能となっている。また、第三接触子１３は、第一接触子１１及び第二接触子１２と同じ高さに位置しており（図２参照）、平面視において（図１参照）基準線Ｌ０上に位置している。つまり、第三接触子１３は、基準線Ｌ０に沿って移動可能となっている。第三接触子１３を移動可能とするために、可動部材２０及びガイド部材３１，３２が設けられている。第三接触子１３は玉形状を有しており、ワーク受け部３８上に載る内輪４の軌道５と点接触する。   On the apparatus base 9, the first contactor 11 and the second contactor 12 are in a fixed state, while the third contactor 13 is movable. The third contact 13 is located at the same height as the first contact 11 and the second contact 12 (see FIG. 2), and is located on the reference line L0 in plan view (see FIG. 1). ing. That is, the third contactor 13 is movable along the reference line L0. In order to make the third contactor 13 movable, a movable member 20 and guide members 31 and 32 are provided. The third contact 13 has a ball shape and makes point contact with the track 5 of the inner ring 4 placed on the work receiving portion 38.

本実施形態のガイド部材３１，３２は、ＬＭガイド（登録商標）であり、ガイド部材３１，３２は、平面視において、基準線Ｌ０を軸として線対称の配置にある。これらガイド部材３１，３２は平行に配置されており、基準線Ｌ０に平行な方向を誘導方向として可動部材２０（後述する可動ベース２０ａ）を移動可能に支持する構成を有している。可動部材２０は、ガイド部材３１，３２に沿って移動可能である可動ベース２０ａと、この可動ベース２０ａに固定されている支持部材２０ｂとを有している。支持部材２０ｂに第三接触子１３が取り付けられている。
以上より、可動部材２０は、第三接触子１３を搭載しており基準線Ｌ０に平行な方向に移動可能であり、ガイド部材３１，３２は、この可動部材２０を基準線Ｌ０に沿って誘導する構成が得られる。 The guide members 31 and 32 of the present embodiment are LM guides (registered trademark), and the guide members 31 and 32 are arranged symmetrically about the reference line L0 in plan view. These guide members 31 and 32 are arranged in parallel, and have a configuration that supports the movable member 20 (movable base 20a described later) in a movable manner with the direction parallel to the reference line L0 as a guide direction. The movable member 20 includes a movable base 20a that can move along the guide members 31 and 32, and a support member 20b that is fixed to the movable base 20a. The third contact 13 is attached to the support member 20b.
As described above, the movable member 20 has the third contact 13 mounted thereon and can move in a direction parallel to the reference line L0. The guide members 31 and 32 guide the movable member 20 along the reference line L0. The structure to be obtained is obtained.

可動ベース２０ａの一部２０ｄには、基準線Ｌ０に平行な貫通孔２０ｃが複数形成されており、前記ロッド１９ｂを挿通させた状態としている。そして、可動ベース２０ａの一部２０ｄと固定ブロック１９ａとの間に、ロッド１９ｂに外嵌するようにして、コイルばねからなる弾性部材２５が設けられている。本実施形態では、弾性部材２５は圧縮コイルばねである。これにより、弾性部材２５は、可動部材２０に搭載されている第三接触子１３を軌道５に押し付けることができる。   A plurality of through holes 20c parallel to the reference line L0 are formed in a part 20d of the movable base 20a, and the rod 19b is inserted therethrough. An elastic member 25 made of a coil spring is provided between the part 20d of the movable base 20a and the fixed block 19a so as to be fitted on the rod 19b. In this embodiment, the elastic member 25 is a compression coil spring. Thereby, the elastic member 25 can press the third contact 13 mounted on the movable member 20 against the track 5.

本実施形態では、一対（図１では上下一対）のロッド１９ｂが、基準線Ｌ０を軸として線対称となる配置で設けられていることから、これらロッド１９ｂに沿って設けられている弾性部材２５についても、基準線Ｌ０を挟んで両側にそれぞれ設けられた構成となり、これにより、一対の弾性部材２５が、可動部材２０の可動ベース２０ａの内の基準線Ｌ０を軸として線対称となる二つの押圧位置Ｐ１，Ｐ２を押すことができる。この構成によれば、可動部材２０が基準線Ｌ０に平行な方向に押されやすくなり、可動部材２０の傾きを可及的に抑えることが可能となる。なお、一対の弾性部材２５の形状（長さ）及び弾性係数は同じものである。   In the present embodiment, the pair of upper and lower rods 19b (in FIG. 1, a pair of rods 19b) are provided in a line-symmetric arrangement with respect to the reference line L0, so that the elastic member 25 provided along these rods 19b. Are also provided on both sides of the reference line L0, whereby the pair of elastic members 25 are two symmetrical with respect to the reference line L0 in the movable base 20a of the movable member 20. The pressing positions P1, P2 can be pressed. According to this configuration, the movable member 20 is easily pushed in a direction parallel to the reference line L0, and the inclination of the movable member 20 can be suppressed as much as possible. The shape (length) and the elastic coefficient of the pair of elastic members 25 are the same.

また、この構成以外に、中央のロッド１９ｂに弾性部材２５が設けられていてもよい。両側のロッド１９ｂに設けられている場合、及び、中央のロッド１９ｂに設けられている場合のいずれにおいても、弾性部材２５は、可動部材２０を基準線Ｌ０に平行な方向に付勢して、第三接触子１３を軌道５に押し付けることができる構成が得られる。   In addition to this configuration, the elastic member 25 may be provided on the central rod 19b. The elastic member 25 urges the movable member 20 in a direction parallel to the reference line L0 in both cases where it is provided on the rods 19b on both sides and in the case where it is provided on the central rod 19b. A configuration in which the third contact 13 can be pressed against the track 5 is obtained.

可動ベース２０ａには、作業者が操作するレバー２６が左右に取り付けられている。レバー２６は、平面視において、基準線Ｌ０を軸として線対称の配置で設けられている。レバー２６を引くことで、弾性部材２５の弾性力に抗して、可動部材２０（第三接触子１３）を第一接触子１１及び第二接触子１２から離すことが可能となる。そして、レバー２６を引く力を解除すると、弾性部材２５の弾性力（復元力）によって可動部材２０（第三接触子１３）は第一接触子１１及び第二接触子１２に接近する方向に移動し、第三接触子１３が軌道５に接触し更に押圧することができる。   A lever 26 operated by an operator is attached to the left and right of the movable base 20a. The levers 26 are provided in a line-symmetric arrangement with respect to the reference line L0 in plan view. By pulling the lever 26, the movable member 20 (third contactor 13) can be separated from the first contactor 11 and the second contactor 12 against the elastic force of the elastic member 25. When the force pulling the lever 26 is released, the movable member 20 (third contactor 13) moves in a direction approaching the first contactor 11 and the second contactor 12 by the elastic force (restoring force) of the elastic member 25. Then, the third contact 13 can contact and further press the track 5.

第一変位計４１及び第二変位計４２は、可動部材２０の基準線Ｌ０に沿った方向の変位量を計測するものであり、本実施形態では接触式のセンサであり、双方で同じものである。変位計４１（４２）は、本体部４１ａ（４２ａ）と、この本体部４１ａ（４２ａ）に対して基準線Ｌ０に平行な方向に進退移動する端子４１ｂ（４２ｂ）とを有しており、可動部材２０に接触する端子４１ｂ（４２ｂ）の移動量を検出信号として出力する。なお、第一変位計４１及び第二変位計４２は非接触式のセンサであってもよい。第一変位計４１及び第二変位計４２は、それぞれが独立して計測に用いられ、計測値（計測信号）を、演算装置１５に出力する。端子４１ｂ（４２ｂ）が可動部材２０の可動ベース２０ａの平坦な面に点で接触した状態にあり、第一変位計４１及び第二変位計４２は可動部材２０の変位量を計測する。   The first displacement meter 41 and the second displacement meter 42 measure the amount of displacement of the movable member 20 in the direction along the reference line L0, and are contact type sensors in the present embodiment, and are the same in both. is there. The displacement meter 41 (42) includes a main body 41a (42a) and a terminal 41b (42b) that moves forward and backward in a direction parallel to the reference line L0 with respect to the main body 41a (42a). The amount of movement of the terminal 41b (42b) in contact with the member 20 is output as a detection signal. The first displacement meter 41 and the second displacement meter 42 may be non-contact sensors. The first displacement meter 41 and the second displacement meter 42 are independently used for measurement, and output a measurement value (measurement signal) to the arithmetic device 15. The terminal 41b (42b) is in a state in which the terminal 41b (42b) is in contact with the flat surface of the movable base 20a of the movable member 20, and the first displacement meter 41 and the second displacement meter 42 measure the displacement amount of the movable member 20.

第一変位計４１及び第二変位計４２は、平面視において、基準線Ｌ０を軸として線対称となる配置に設けられており、検出方向を基準線Ｌ０に平行な方向としている。これにより、第一変位計４１及び第二変位計４２は、可動部材２０の内の基準線Ｌ０を軸として線対称となる二つの位置を計測位置Ｐ１１，Ｐ１２として、可動部材２０の変位量をそれぞれ計測する。   The first displacement meter 41 and the second displacement meter 42 are provided in a line-symmetric arrangement with respect to the reference line L0 in plan view, and the detection direction is a direction parallel to the reference line L0. Thereby, the first displacement meter 41 and the second displacement meter 42 set the displacement amount of the movable member 20 with the two positions that are symmetric about the reference line L0 of the movable member 20 as the measurement positions P11 and P12. Measure each.

可動部材２０の変位量は第三接触子１３の変位量と等しくなり、設計上では、第一変位計４１及び第二変位計４２は、同じ値の計測値（変位量）を取得する。しかし、仮に、ガイド部材３１，３２に対する可動部材２０の直進性が不安定となって、軌道５に対する第三接触子１３の接触位置を中心として可動部材２０が回転し、可動部材２０が基準線Ｌ０に対して傾いた状態になると、第一変位計４１及び第二変位計４２はそれぞれ異なる計測値（変位量）を取得する。これら異なる計測値（変位量）をそれぞれ仮変位量と呼ぶことができる。   The displacement amount of the movable member 20 becomes equal to the displacement amount of the third contact 13, and in design, the first displacement meter 41 and the second displacement meter 42 obtain the same measured value (displacement amount). However, temporarily, the linearity of the movable member 20 with respect to the guide members 31 and 32 becomes unstable, the movable member 20 rotates around the contact position of the third contactor 13 with respect to the track 5, and the movable member 20 becomes the reference line. If it will be in the state inclined with respect to L0, the 1st displacement meter 41 and the 2nd displacement meter 42 will acquire a different measured value (displacement amount), respectively. These different measurement values (displacement amounts) can be called temporary displacement amounts.

演算装置１５は、例えば各種演算を行うコンピュータ装置からなり、第一変位計４１及び第二変位計４２の計測値（仮変位量）の平均値を求める処理を行う。更に、本実施形態の演算装置１５は、この平均値を用いて、軌道５の直径Ｄを求める処理も行う。これらの処理については、後の測定方法で説明する。   The computing device 15 is composed of, for example, a computer device that performs various computations, and performs processing for obtaining an average value of measured values (temporary displacement amounts) of the first displacement meter 41 and the second displacement meter 42. Furthermore, the arithmetic unit 15 of the present embodiment also performs processing for obtaining the diameter D of the track 5 using this average value. These processes will be described later in the measurement method.

本実施形態の測定装置１０では、第一接触子１１、第二接触子１２及び第三接触子１３は、基準線Ｌ０上の点Ｑを中心とする一つの仮想円上に配置された状態となることができ、この状態で、点Ｑを中心として周方向に均等配置されている。つまり、接触子１１，１２，１３は１２０度ピッチで配置されている。そして、前記のとおり、平面視において、第一接触子１１及び第二接触子１２は、基準線Ｌ０を軸として線対称の配置にあり、また、第三接触子１３は、基準線Ｌ０上に位置していることから、前記のとおり、第一接触子１１と軌道５との接触点と、第二接触子１２と軌道５との接触点とを結ぶ線分の垂直二等分線が、基準線Ｌ０と一致する。
なお、三つの接触子１１，１２，１３は、周方向に均等配置されていなくてもよいが、第一接触子１１及び第二接触子１２は、基準線Ｌ０を軸として線対称の配置にあり、第三接触子１３は、基準線Ｌ０上に位置している必要がある。そして、第三接触子１３は、この基準線Ｌ０に沿って移動可能となっている。 In the measuring apparatus 10 of the present embodiment, the first contact 11, the second contact 12, and the third contact 13 are arranged on a single virtual circle centered on the point Q on the reference line L0. In this state, they are evenly arranged around the point Q in the circumferential direction. That is, the contacts 11, 12, and 13 are arranged at a pitch of 120 degrees. And as above-mentioned, in planar view, the 1st contactor 11 and the 2nd contactor 12 are in the line symmetrical arrangement about the reference line L0, and the 3rd contactor 13 is on the reference line L0. Since it is located, as described above, the vertical bisector connecting the contact point between the first contactor 11 and the track 5 and the contact point between the second contactor 12 and the track 5 is It matches the reference line L0.
Note that the three contacts 11, 12, and 13 do not have to be evenly arranged in the circumferential direction, but the first contact 11 and the second contact 12 are arranged symmetrically about the reference line L0. Yes, the third contactor 13 needs to be positioned on the reference line L0. And the 3rd contactor 13 can move along this reference line L0.

〔測定方法について〕
以上の構成を備えている測定装置１０によって行われる測定方法について説明する。
この測定方法は、測定装置１０の基準線Ｌ０上の一点Ｑを中心として内輪４を設置し、この内輪４の外周面に形成されている軌道５（測定対象面）に対して、固定状態にある第一接触子１１及び第二接触子１２と、移動可能となっている第三接触子１３とを接触させることで、この軌道５における直径Ｄを測定する方法である。測定方法には、準備工程Ｓｔ１、計測工程Ｓｔ２及び演算工程Ｓｔ３が含まれる（図３参照）。図４及び図５は、各工程を説明するための測定装置１０の概略図である。 [Measurement method]
A measurement method performed by the measurement apparatus 10 having the above configuration will be described.
In this measuring method, the inner ring 4 is installed around a point Q on the reference line L0 of the measuring apparatus 10, and the inner ring 4 is fixed to the track 5 (measurement target surface) formed on the outer peripheral surface of the inner ring 4. This is a method of measuring the diameter D of the track 5 by bringing a first contactor 11 and a second contactor 12 into contact with a movable third contactor 13. The measurement method includes a preparation process St1, a measurement process St2, and a calculation process St3 (see FIG. 3). 4 and 5 are schematic views of the measuring apparatus 10 for explaining each process.

準備工程Ｓｔ１では、図４に示すように、三つの接触子１１，１２，１３の間に内輪４を設置するために、作業者はレバー２６（図１参照）を引いて弾性部材２５の弾性力に抗して可動部材２０に搭載の第三接触子１３を、第一接触子１１及び第二接触子１２から離れた位置とする。そして、前記レバー２６の引く力を解除することで、弾性力（復元力）によって弾性部材２５が第三接触子１３を搭載する可動部材２０を押し、可動部材２０をガイド部材３１，３２により基準線Ｌ０に平行な方向に誘導して、図５に示すように第三接触子１３を軌道５に接触させ、更に、前記弾性力によって第三接触子１３を軌道５に押し付ける。これと共に、第一接触子１１及び第二接触子１２が、軌道５に接触した状態となる。弾性部材２５の力により、内輪４に測定荷重が付与される。   In the preparation step St1, as shown in FIG. 4, in order to install the inner ring 4 between the three contacts 11, 12, 13, the operator pulls the lever 26 (see FIG. 1) and the elasticity of the elastic member 25. The third contact 13 mounted on the movable member 20 against the force is positioned away from the first contact 11 and the second contact 12. Then, by releasing the pulling force of the lever 26, the elastic member 25 pushes the movable member 20 on which the third contactor 13 is mounted by the elastic force (restoring force), and the movable member 20 is referenced by the guide members 31 and 32. Guided in a direction parallel to the line L0, the third contact 13 is brought into contact with the track 5 as shown in FIG. 5, and the third contact 13 is pressed against the track 5 by the elastic force. At the same time, the first contact 11 and the second contact 12 are in contact with the track 5. A measurement load is applied to the inner ring 4 by the force of the elastic member 25.

次の計測工程Ｓｔ２では、内輪４に前記測定荷重が付与された状態で、第一変位計４１及び第二変位計４２による可動部材２０（可動ベース２０ａ）の変位量が計測される。
この計測工程Ｓｔ２では、第一変位計４１及び第二変位計４２により（図１参照）、可動部材２０（可動ベース２０ａ）の内の基準線Ｌ０を軸として線対称となる二つの位置を計測位置Ｐ１１，Ｐ１２として、この可動部材２０（可動ベース２０ａ）の変位量が計測される。
第一変位計４１及び第二変位計４２の計測値（計測信号）は、演算装置１５に出力され、演算装置１５によって、これら計測値を用いて軌道５の直径Ｄが演算により求められる。 In the next measurement step St2, the displacement amount of the movable member 20 (movable base 20a) by the first displacement meter 41 and the second displacement meter 42 is measured in a state where the measurement load is applied to the inner ring 4.
In this measuring step St2, the first displacement meter 41 and the second displacement meter 42 (see FIG. 1) measure two positions that are symmetric about the reference line L0 in the movable member 20 (movable base 20a). As the positions P11 and P12, the displacement amount of the movable member 20 (movable base 20a) is measured.
The measurement values (measurement signals) of the first displacement meter 41 and the second displacement meter 42 are output to the calculation device 15, and the calculation device 15 obtains the diameter D of the track 5 by calculation using these measurement values.

次の演算工程Ｓｔ３では、軌道５における直径Ｄを求めるために、二つの計測位置Ｐ１１，Ｐ１２における前記変位量の平均値が求められる。
また、演算装置１５が有している記憶部には、計測が行われる毎に前記計測値及び前記平均値が記憶されると共に、ワークマスタの寸法が既に記憶されている。ワークマスタは、測定の対象とする前記内輪４と同じ形状を有する内輪であり、その軌道の寸法（直径）が既知のものである。そして、このワークマスタについても測定装置１０を用いて可動ベース２０ａの変位量（二つの計測値の平均値）が求められており、その結果（平均値）が演算装置１５の記憶部に記憶されている。 In the next calculation step St3, in order to obtain the diameter D in the track 5, the average value of the displacement amounts at the two measurement positions P11 and P12 is obtained.
Further, the measurement unit and the average value are stored every time measurement is performed, and the dimensions of the work master are already stored in the storage unit of the arithmetic device 15. The work master is an inner ring having the same shape as the inner ring 4 to be measured, and has a known track dimension (diameter). And also about this work master, the displacement amount (average value of two measured values) of the movable base 20a is obtained using the measuring device 10, and the result (average value) is stored in the storage unit of the arithmetic unit 15. ing.

ここで、前記のとおり、仮に、ガイド部材３１，３２に対する可動部材２０の直進性が不安定となって、軌道５に対する第三接触子１３の接触位置を中心として可動部材２０が回転し、可動部材２０が基準線Ｌ０に対して傾いた状態になると、第一変位計４１及び第二変位計４２はそれぞれ異なる計測値を、前記仮変位量として取得する。これら仮変位量は、基準線Ｌ０に沿った方向の実際の可動部材２０の変位量ではなく、可動部材２０が傾いた状態となることによる成分が含まれている。しかし、可動部材２０の傾き角度（回転角度）は非常に小さいことから、第一変位計４１及び第二変位計４２からそれぞれ取得される仮変位量を平均することで前記傾きによる成分が補正され、この平均した値を、可動部材２０の基準線Ｌ０に沿った方向の変位量とみなすことができる。   Here, as described above, it is assumed that the linearity of the movable member 20 with respect to the guide members 31 and 32 becomes unstable, and the movable member 20 rotates around the contact position of the third contact 13 with respect to the track 5 to be movable. When the member 20 is tilted with respect to the reference line L0, the first displacement meter 41 and the second displacement meter 42 acquire different measurement values as the temporary displacement amounts. These temporary displacement amounts are not actual displacement amounts of the movable member 20 in the direction along the reference line L0, but include components due to the movable member 20 being inclined. However, since the tilt angle (rotation angle) of the movable member 20 is very small, the component due to the tilt is corrected by averaging the temporary displacement amounts acquired from the first displacement meter 41 and the second displacement meter 42, respectively. The average value can be regarded as the amount of displacement of the movable member 20 in the direction along the reference line L0.

このように、演算工程Ｓｔ３では、演算装置１５は、第一変位計４１及び第二変位計４２の計測値の平均値を求める。そして、演算装置１５は、前記平均値、及び、直径が既知であるワークマスタの軌道における当該直径を用いて、実際に測定の対象とした内輪４の軌道５における直径Ｄを演算によって求める。つまり、ワークマスタとの比較によって、内輪４の軌道５における直径Ｄが求められる。   Thus, in the calculation step St3, the calculation device 15 obtains the average value of the measurement values of the first displacement meter 41 and the second displacement meter 42. Then, the arithmetic device 15 calculates the diameter D of the track 5 of the inner ring 4 that is actually measured using the average value and the diameter of the track of the work master whose diameter is known. That is, the diameter D in the track 5 of the inner ring 4 is obtained by comparison with the work master.

なお、軌道５における直径Ｄを求める処理は、前記の方法以外であってもよく、例えば、第一変位計４１及び第二変位計４２の計測値の平均値を用いて、第一接触子１１と第二接触子１２と第三接触子１３の配置に基づく幾何学的な計算により、直径Ｄを演算により求めてもよい。   The process for obtaining the diameter D in the track 5 may be other than the above-described method. For example, the average value of the measured values of the first displacement meter 41 and the second displacement meter 42 may be used. Further, the diameter D may be calculated by a geometric calculation based on the arrangement of the second contact 12 and the third contact 13.

以上のような構成を備えた測定装置１０によって行われる測定方法によれば、可動部材２０の変位量を計測するために、基準線Ｌ０を軸として線対称となる二つの位置を計測位置Ｐ１１，Ｐ１２として可動部材２０の変位量が、第一変位計４１及び第二変位計４２によって計測され、これらの変位量の平均値が求められる。このため、たとえ、ガイド部材３１，３２に対する可動部材２０の直進性が不安定となっていて、可動部材２０が、軌道５に対する第三接触子１３の接触位置を中心として回転し、基準線Ｌ０に対して傾いた状態となったとしても、二つの計測位置Ｐ１１，Ｐ１２における計測値を平均化することで、可動部材２０の変位量をより正確に求めることができ、軌道５における直径Ｄの測定誤差を可及的に低減することが可能となる。   According to the measurement method performed by the measurement apparatus 10 having the above-described configuration, in order to measure the displacement amount of the movable member 20, two positions that are line-symmetric with respect to the reference line L0 are measured positions P11, The displacement amount of the movable member 20 is measured by the first displacement meter 41 and the second displacement meter 42 as P12, and the average value of these displacement amounts is obtained. For this reason, even if the linearity of the movable member 20 with respect to the guide members 31 and 32 is unstable, the movable member 20 rotates around the contact position of the third contact 13 with respect to the track 5, and the reference line L0. Even if it is in a state of being inclined with respect to the angle, the measurement value at the two measurement positions P11 and P12 can be averaged to obtain the displacement amount of the movable member 20 more accurately, and the diameter D of the track 5 can be obtained. Measurement errors can be reduced as much as possible.

このように、第一変位計４１及び第二変位計４２の計測値を平均化することで、可動部材２０の傾きによる誤差が補正され、演算装置１５が行う軌道５の直径Ｄの測定精度を高めることができ、また、測定の安定した繰返し性が得られる。
そして、内輪４の直径Ｄの測定精度を向上させることができ、この結果、この内輪４を用いることにより、すきま（Ｒａすきま）や接触角の安定した高いレベルの玉軸受を得ることが可能となる。 Thus, by averaging the measured values of the first displacement meter 41 and the second displacement meter 42, the error due to the inclination of the movable member 20 is corrected, and the measurement accuracy of the diameter D of the track 5 performed by the arithmetic device 15 is increased. In addition, it is possible to obtain a stable repeatability of measurement.
And the measurement accuracy of the diameter D of the inner ring 4 can be improved. As a result, by using this inner ring 4, it is possible to obtain a high level ball bearing with a stable clearance (Ra clearance) and contact angle. Become.

前記実施形態では、測定の対象を内輪４としているが、外輪６であってもよい。この場合の測定装置を、図６及び図７に示す。この測定装置１０では、外輪６の内周面に形成されている軌道７を測定対象面とし、この軌道７の直径Ｄが計測される。外輪６の場合、測定装置１０では、三つの接触子１１，１２，１３を外輪６の軌道７に対して径方向内側から接触させる構成となるが、その他の構成及び機能、並びに測定方法については、図１及び図２に示す形態と同様である。   In the above embodiment, the inner ring 4 is the object of measurement, but the outer ring 6 may be used. The measurement apparatus in this case is shown in FIGS. In the measuring device 10, the track 7 formed on the inner peripheral surface of the outer ring 6 is used as a measurement target surface, and the diameter D of the track 7 is measured. In the case of the outer ring 6, the measuring device 10 has a configuration in which the three contacts 11, 12, and 13 are brought into contact with the raceway 7 of the outer ring 6 from the inner side in the radial direction. These are the same as those shown in FIGS.

以上のとおり開示した実施形態はすべての点で例示であって制限的なものではない。つまり、本発明の測定装置は、図示する形態に限らず本発明の範囲内において他の形態のものであってもよい。
測定対象を玉軸受の内輪４、外輪６とする場合について説明したが、これに限らず、他の転がり軸受の軌道輪や、その他の円筒ワークの直径（内径や外径）を測定するために、本発明の測定装置及び測定方法を適用することができる。 The embodiments disclosed above are illustrative in all respects and not restrictive. That is, the measuring apparatus of the present invention is not limited to the illustrated form, and may be of another form within the scope of the present invention.
Although the case where the measurement object is the inner ring 4 and the outer ring 6 of the ball bearing has been described, not limited to this, in order to measure the diameter (inner diameter and outer diameter) of the raceway ring of other rolling bearings and other cylindrical workpieces The measuring apparatus and measuring method of the present invention can be applied.

４：内輪（円筒ワーク） ５：軌道（測定対象面） ６：外輪（円筒ワーク）
７：軌道（測定対象面） １０：測定装置 １１：第一接触子
１２：第二接触子 １３：第三接触子 １５：演算装置
２０：可動部材 ２５：弾性部材 ３１：ガイド部材
３２：ガイド部材 ４１：第一変位計 ４２：第二変位計
Ｄ：直径 Ｌ０：基準線 Ｐ１，Ｐ２：押圧位置
Ｐ１１，Ｐ１２：計測位置 Ｑ：基準線上の一点 4: Inner ring (cylindrical workpiece) 5: Track (surface to be measured) 6: Outer ring (cylindrical workpiece)
7: Track (surface to be measured) 10: Measuring device 11: First contact 12: Second contact 13: Third contact 15: Arithmetic device 20: Movable member 25: Elastic member 31: Guide member 32: Guide member 41: First displacement meter 42: Second displacement meter D: Diameter L0: Reference line P1, P2: Pressing position P11, P12: Measurement position Q: One point on the reference line

Claims (5)

基準線を軸として線対称の配置にある第一接触子及び第二接触子と、前記基準線上に位置する第三接触子とを有し、前記基準線上の一点を中心として設置する円筒ワークの外周面及び内周面の内のいずれか一方の測定対象面に、当該第一接触子、当該第二接触子及び当該第三接触子を接触させることで、当該測定対象面における直径の測定を行うための測定装置であって、
前記第三接触子を搭載している可動部材と、
前記可動部材を前記基準線に沿って誘導するガイド部材と、
前記可動部材を前記基準線に平行な方向に付勢して前記第三接触子を前記測定対象面に押し付けるための弾性部材と、
前記可動部材の内の前記基準線を軸として線対称となる二つの位置を計測位置として当該可動部材の変位量を計測する第一変位計及び第二変位計と、
を備えている測定装置。 A cylindrical contact that has a first contact and a second contact in a line-symmetric arrangement with respect to a reference line, and a third contact located on the reference line, and is installed around one point on the reference line The diameter of the measurement target surface is measured by bringing the first contact, the second contact, and the third contact into contact with one of the measurement target surfaces of the outer peripheral surface and the inner peripheral surface. A measuring device for performing,
A movable member carrying the third contact;
A guide member for guiding the movable member along the reference line;
An elastic member for urging the movable member in a direction parallel to the reference line and pressing the third contact against the surface to be measured;
A first displacement meter and a second displacement meter that measure a displacement amount of the movable member with two positions that are symmetrical about the reference line of the movable member as an axis, and a measurement position;
Measuring device. 前記第一変位計及び前記第二変位計の計測値の平均値を求める演算装置を、更に備えている請求項１に記載の測定装置。   The measuring device according to claim 1, further comprising an arithmetic device that obtains an average value of measured values of the first displacement meter and the second displacement meter. 前記演算装置は、前記平均値及びワークマスタの測定対象面における直径を用いて前記円筒ワークの測定対象面における直径を求める請求項２に記載の測定装置。   The measuring apparatus according to claim 2, wherein the arithmetic device obtains a diameter of the cylindrical workpiece on the measurement target surface using the average value and a diameter of the workpiece master on the measurement target surface. 前記弾性部材は、前記可動部材の内の前記基準線を軸として線対称となる二つの押圧位置を押すために、当該基準線を挟んで両側にそれぞれ設けられている、請求項１〜３のいずれか一項に記載の測定装置。   The elastic members are provided on both sides of the reference line, respectively, in order to push two pressing positions that are line-symmetric with respect to the reference line of the movable member. The measuring apparatus as described in any one. 基準線を軸として線対称の配置にある第一接触子及び第二接触子と、前記基準線上に位置する第三接触子とを、前記基準線上の一点を中心として設置する円筒ワークの外周面及び内周面の内のいずれか一方の測定対象面に接触させることで、当該測定対象面における直径を測定するための方法であって、
前記第三接触子を搭載する可動部材をガイド部材により前記基準線に平行な方向に誘導して当該第三接触子を前記測定対象面に接触させ、更に、当該第三接触子を当該測定対象面に押し付けると共に、前記第一接触子及び前記第二接触子を、前記測定対象面に接触させた状態とする工程と、
前記可動部材の内の前記基準線を軸として線対称となる二つの位置を計測位置として当該可動部材の変位量を計測する工程と、
前記測定対象面における直径を求めるために、前記二つの計測位置における前記変位量の平均値を求める工程と、
を備えている測定方法。 An outer peripheral surface of a cylindrical workpiece in which a first contact and a second contact in a line-symmetric arrangement with respect to a reference line and a third contact located on the reference line are set around one point on the reference line. And a method for measuring the diameter of the measurement target surface by contacting one of the measurement target surfaces of the inner peripheral surface,
The movable member carrying the third contact is guided by a guide member in a direction parallel to the reference line to bring the third contact into contact with the measurement target surface, and the third contact is further measured with the measurement target. Pressing the surface and bringing the first contact and the second contact into contact with the surface to be measured; and
Measuring the amount of displacement of the movable member using the two positions that are symmetrical about the reference line of the movable member as the measurement position;
Obtaining an average value of the displacement amounts at the two measurement positions in order to obtain the diameter of the measurement target surface;
Measuring method.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111811817A (en) * 2020-07-15 2020-10-23 合肥工业大学 High-precision fluid dynamic pressure sliding bearing comprehensive performance test platform
CN111811817B (en) * 2020-07-15 2022-07-12 合肥工业大学 High-precision fluid dynamic pressure sliding bearing comprehensive performance test platform

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