JP2716249B2 - Machine tool accuracy measurement method - Google Patents
Machine tool accuracy measurement methodInfo
- Publication number
- JP2716249B2 JP2716249B2 JP2196295A JP19629590A JP2716249B2 JP 2716249 B2 JP2716249 B2 JP 2716249B2 JP 2196295 A JP2196295 A JP 2196295A JP 19629590 A JP19629590 A JP 19629590A JP 2716249 B2 JP2716249 B2 JP 2716249B2
- Authority
- JP
- Japan
- Prior art keywords
- measuring
- main shaft
- rod member
- lissajous
- machine tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は工作機械の主軸の回転の振れ精度を測定する
方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for measuring the runout accuracy of the rotation of a main shaft of a machine tool.
ワークの加工精度の基本的要因となる主軸の回転の振
れ精度の測定方法としては、主軸の外周又は主軸に装着
した測定バーの外周にダイヤルゲージを直接的に接触さ
せてその振れ精度を静的に測定する方法がある。As a method of measuring the runout accuracy of the main shaft rotation, which is a basic factor of the processing accuracy of the workpiece, the dial gauge is brought into direct contact with the outer periphery of the main shaft or the outer periphery of the measurement bar attached to the main shaft, and the runout accuracy is statically measured. There is a method to measure.
〔発明が解決しようとする課題〕 然しながら、上記の様な直接接触方式では主軸を低速
回転させる場合には測定が可能であるが、高速回転の場
合には測定が不可能である。[Problems to be Solved by the Invention] However, in the direct contact method as described above, measurement is possible when the main shaft is rotated at low speed, but measurement is not possible when the main shaft is rotated at high speed.
依って本発明は、工作機械の主軸回転の動的な振れ精
度を容易に、かつ、正確に測定する方法の提供を目的と
する。Therefore, an object of the present invention is to provide a method for easily and accurately measuring the dynamic runout accuracy of the spindle rotation of a machine tool.
上記目的を鑑みて本発明は、工作機械の主軸に円形断
面をした測定用棒部材の装着部を装着して回転させ、該
測定用棒部材の測定部の前記主軸の中心軸線に対する回
転の振れ精度を非接触に測定する工作機械の精度測定方
法において、前記主軸への前記測定用棒部材の装着時
に、前記測定用棒部材の測定部の外形を前記主軸の中心
軸線に対して偏心するように形成し、前記測定用棒部材
の測定部に指向させて２つの非接触式の距離測定センサ
を互いに直交する半径方向に設置し、前記主軸の回転時
における前記２つの非接触式の距離測定センサにより得
る測定出力を表示制御装置のX,Y入力部にそれぞれ導
き、前記主軸を回転させながら前記表示制御装置の表示
部に、前記２つの非接触式の距離測定センサからの測定
出力によって得る被測定リサージュ図形を表示させ、該
被測定リサージュ図形と回転の振れがない場合の基準円
形リサージュ図形とを比較して前記主軸の回転の振れ精
度を測定する、工作機械の精度測定方法を提供する。In view of the above-mentioned object, the present invention is directed to mounting and rotating a mounting portion of a measuring bar member having a circular cross section on a main shaft of a machine tool, and rotating the measuring portion of the measuring rod member with respect to the central axis of the main shaft. In the method for measuring accuracy of a machine tool for measuring accuracy in a non-contact manner, the outer shape of a measuring portion of the measuring rod member may be eccentric with respect to a center axis of the main shaft when the measuring rod member is mounted on the main shaft. And two non-contact type distance measuring sensors are installed in a radial direction orthogonal to each other so as to be directed to the measuring portion of the measuring rod member, and the two non-contact type distance measuring devices are rotated when the main shaft is rotated. The measurement outputs obtained by the sensors are respectively guided to the X and Y input units of the display control device, and the measurement outputs from the two non-contact type distance measurement sensors are obtained on the display unit of the display control device while rotating the main shaft. Measured Ju to display graphics, by comparing the reference circular Lissajous figure when there is no run-out of the rotation 該被 measured Lissajous figure for measuring the run-out accuracy of rotation of the main shaft, provides a precision measurement method of a machine tool.
測定用棒部材の測定部を偏心させているのは、リサー
ジュ図形を表示制御装置の表示部に表示した場合に図形
ラインが互いに交鎖し、主軸の振れ状態が視覚的に捉え
難くなることを避け、所定の大きさの円を基準として、
その円に対する凹凸として描かせるためである。主軸が
低速回転する場合には、表示部上のリサージュ図形を描
く点の動きを追跡することができ、主軸の回転位置と対
応させることも可能となる。一方、高速回転の場合に
は、点の動きはほとんど見えず、表示部上に一定のリサ
ージュ図形が描かれることとなり、これもまた、主軸の
振れの状態が明瞭に捉えられることとなる。The eccentricity of the measuring part of the measuring rod member is that when the Lissajous figure is displayed on the display part of the display control device, the graphic lines cross each other, making it difficult to visually grasp the deflection state of the main shaft. Avoid, based on a circle of a predetermined size,
This is for drawing as unevenness with respect to the circle. When the main shaft rotates at a low speed, the movement of a point on the display unit at which the Lissajous figure is drawn can be tracked, and it is possible to correspond to the rotational position of the main shaft. On the other hand, in the case of high-speed rotation, the movement of a point is hardly seen, and a fixed Lissajous figure is drawn on the display unit, which also clearly captures the state of the swing of the main shaft.
以下本発明を添付図面に示す実施例に基づき、更に詳
細に説明する。Hereinafter, the present invention will be described in more detail based on embodiments shown in the accompanying drawings.
まず、第１図と第２図とを参照すると、工作機械の主
軸16には、主軸16が、その回転軸受の取付精度等に起因
して、必ずしもその主軸中心軸線L1を正確な中心として
は回転せず、一般に振れを生ずるが、その振れを測定す
るための測定用棒部材18を装着している。この棒部材18
は、先端部18aは、その装着部18bの中心軸線、即ち、上
記中心軸線L1に対して偏心量ｅだけ敢えて偏心させて形
成している。以下に述べる２つの距離測定センサ20aと2
2aは、上記偏心先端部18aの外周の振れ変動を測定する
ことにより、主軸16の振れを測定するのである。First, referring to FIG. 1 and FIG. 2, the main shaft 16 of the machine tool does not necessarily have the main shaft center axis L1 as an accurate center due to the mounting accuracy of the rotary bearing. Although it does not rotate and generally produces a run-out, a measurement bar member 18 for measuring the run-out is mounted. This rod member 18
Is formed such that the distal end portion 18a is intentionally eccentric with respect to the center axis of the mounting portion 18b, that is, the center axis L1 by the amount of eccentricity e. The two distance measuring sensors 20a and 2 described below
2a measures the run-out of the main shaft 16 by measuring the run-out fluctuation of the outer periphery of the eccentric tip 18a.
工作機械のワークテーブル10上には、スタンド用支柱
12が立設固定されており、該支柱12に対して上下方向に
摺動可能であって、ねじ部品24によって所定高さ位置に
固定できるアーム14が設けられている。このアーム14に
は、測定用棒部材18に対して、互いに直交する２つの方
向X,Yに距離測定センサ20a,22aを指向させるべく２つの
センサ装置20と22とが該アーム14に対して摺動可能に取
り付けられている。これらセンサ装置20と22とは、夫
々、ねじ部品20c又は22cによって所定位置に固定可能で
ある。更には、ねじ部品20bと22bとは、夫々、センサ20
a又は22aをＸ又はＹ方向へ微少移動させ得る調節ねじ部
品である。On the work table 10 of the machine tool, there are
There is provided an arm 14 which is erected and fixed vertically, which can be slid in the vertical direction with respect to the column 12, and which can be fixed at a predetermined height position by a screw component 24. The arm 14 is provided with two sensor devices 20 and 22 for pointing the distance measuring sensors 20a and 22a in two directions X and Y orthogonal to each other with respect to the measuring rod member 18. It is slidably mounted. These sensor devices 20 and 22 can be fixed at predetermined positions by screw components 20c or 22c, respectively. Furthermore, the threaded parts 20b and 22b are
This is an adjustment screw component that can slightly move the a or 22a in the X or Y direction.
まずセンサ装置20をアーム14の左端に仮移動させてお
き、アーム14を支柱12の適宜上方位置においてねじ部品
24によって固定する。次に、上記センサ装置20をアーム
14に沿って移動させ、主軸中心軸線L1の真下の位置にね
じ部品20cによって固定する。その後、他のセンサ装置2
2を主軸中心軸線の真横の位置にねじ部品22cによって固
定する。次に、各調節ねじ部品20b,22bによってセンサ2
0aと22aとを測定用棒部材18の先端部18aの外周面に接触
させ、その位置を基準として、例えば1mm程、夫々のセ
ンサ20aと22aとを後退させれば測定準備が完了する。な
お、各センサ20a,22aは表示部26aを有したオシロスコー
プ26の入力Ｘ又は入力Ｙに接続されている。First, the sensor device 20 is temporarily moved to the left end of the arm 14, and the arm 14 is screwed at an appropriate position above the column 12.
Fix by 24. Next, the sensor device 20 is armed.
14, and is fixed to the position directly below the spindle center axis L1 by the screw component 20c. Then, the other sensor device 2
2 is fixed to the position just beside the spindle center axis by the screw part 22c. Next, the sensor 2 is adjusted by the adjusting screw parts 20b and 22b.
The measurement preparation is completed when the sensors 0a and 22a are brought into contact with the outer peripheral surface of the distal end portion 18a of the measuring rod member 18 and the respective sensors 20a and 22a are retracted, for example, by about 1 mm with reference to the position. The sensors 20a and 22a are connected to the input X or the input Y of the oscilloscope 26 having the display 26a.
上述の如く、測定用棒部材18の測定部である先端部18
aはｅだけ偏心させているため、もし主軸16が理想的に
その中心軸線L1を中心として回転するならば、夫々のセ
ンサが検知、測定する測定先端部18aの外周との距離は
正弦波状に変化する。従って、それらの合成図であるリ
サージュ図形はある大きさの円となる。この円は第３図
において二点鎖線30で示す基準の円である。その後、高
速で回転させれば、軸受の取付精度や剛性に応じて振れ
を生じ、円30に対して変形したリサージュ図形32が描か
れる。従って、Ｘ軸を基準として角度θだけ回転した状
態においては の分だけ主軸16の回転中心軸線が振れており、その振れ
量と方向が変化している状態がＯθ２πの全範囲に
亘り明瞭となる。本発明に係る偏心した測定用棒部材を
用いるのではなく、真円柱部材を用いると、基準となる
円30に対応するものは点Ｏとなり、第３図に測定された
と同じ主軸の振れを真円柱部材で測定した場合のリサー
ジュ図形は第４図のようになる。Ｘ軸を基準とした角度
θにおける と対応する。リサージュ図形34上の矢印の主軸16の回転
に伴う該リサージュ図形の描かれる方向を示している
が、主軸16が高速で回転する場合にはこの変化を視覚的
に追跡することは不可能であり、Ｘ軸に対して上下方向
に対称の図形とも認識できるが、実際には第３図に示す
様に上下対称の図形ではない。この様な誤った認識に至
らないために、測定用には外形が偏心した棒部材の使用
が必須となるのである。なお、この偏心棒部材18は重量
的にはバランスさせて作っておかなければ、主軸16の真
の振れが測定され得ない。そのためには、棒部材18の先
端部18aの偏心方向において重量調節用の孔18cを設けて
おく等の対策が必要である。As described above, the distal end portion 18 which is the measuring portion of the measuring rod member 18 is used.
Since a is eccentric by e, if the spindle 16 rotates ideally around its central axis L1, the distance from the outer periphery of the measurement tip 18a to be detected and measured by each sensor is sinusoidal. Change. Therefore, the Lissajous figure which is a composite diagram of them is a circle of a certain size. This circle is a reference circle indicated by a two-dot chain line 30 in FIG. Thereafter, when the bearing is rotated at a high speed, a deflection occurs according to the mounting accuracy and rigidity of the bearing, and a Lissajous figure 32 deformed with respect to the circle 30 is drawn. Therefore, in a state where the rotation is made by the angle θ with respect to the X axis, , The rotation center axis of the main shaft 16 is deflected, and the state in which the deflection amount and direction are changed becomes clear over the entire range of Oθ2π. When a true cylindrical member is used instead of using the eccentric measuring rod member according to the present invention, the point corresponding to the reference circle 30 is a point O, and the same deflection of the main shaft as measured in FIG. FIG. 4 shows a Lissajous figure measured with a cylindrical member. At an angle θ with respect to the X axis And corresponding. Although the direction in which the Lissajous figure is drawn with the rotation of the main axis 16 of the arrow on the Lissajous figure 34 is shown, it is impossible to visually track this change when the main axis 16 rotates at high speed. , Can be recognized as a figure which is vertically symmetrical with respect to the X axis, but is not actually a figure which is vertically symmetrical as shown in FIG. In order to prevent such erroneous recognition, it is necessary to use a rod member having an eccentric outer shape for measurement. It is to be noted that the true deflection of the main shaft 16 cannot be measured unless the eccentric rod member 18 is made in a weight-balanced manner. For this purpose, it is necessary to take measures such as providing a hole 18c for adjusting the weight in the eccentric direction of the distal end portion 18a of the rod member 18.
以上の説明から明らかな様に本発明によれば、工作機
械の主軸回転の動的な振れ精度を容易に、かつ、正確に
測定することが可能となる。As is apparent from the above description, according to the present invention, it is possible to easily and accurately measure the dynamic runout accuracy of the spindle rotation of a machine tool.
第１図は本発明に係る方法を実施するための装置の正面
図、 第２図は第１図の装置の平面図、 第３図は本発明方法によって描いたリサージュ図形を示
す図、 第４図は従来の１つの測定方法によって描いたリサージ
ュ図形を示す図である。 16……主軸、18……測定用棒部材、 18a……偏心している先端部、 20a,22a……距離測定センサ、 26……オシロスコープ。FIG. 1 is a front view of an apparatus for performing the method according to the present invention, FIG. 2 is a plan view of the apparatus of FIG. 1, FIG. 3 is a diagram showing a Lissajous figure drawn by the method of the present invention, FIG. The figure shows a Lissajous figure drawn by one conventional measurement method. 16 ... Main shaft, 18 ... Measurement rod member, 18a ... Eccentric tip, 20a, 22a ... Distance measurement sensor, 26 ... Oscilloscope.
Claims (1)
部材の装着部を装着して回転させ、該測定用棒部材の測
定部の前記主軸の中心軸線に対する回転の振れ精度を非
接触に測定する工作機械の精度測定方法において、 前記主軸への前記測定用棒部材の装着時に、前記測定用
棒部材の測定部の外形を前記主軸の中心軸線に対して偏
心するように形成し、 前記測定用棒部材の測定部に指向させて２つの非接触式
の距離測定センサを互いに直交する半径方向に設置し、 前記主軸の回転時における前記２つの非接触式の距離測
定センサにより得る測定出力を表示制御装置のX,Y入力
部にそれぞれ導き、 前記主軸を回転させながら前記表示制御装置の表示部
に、前記２つの非接触式の距離測定センサからの測定出
力によって得る被測定リサージュ図形を表示させ、 該被測定リサージュ図形と回転の振れがない場合の基準
円形リサージュ図形とを比較して前記主軸の回転の振れ
精度を測定する、 ことを特徴とした工作機械の精度測定方法。1. A mounting part of a measuring bar member having a circular cross section is mounted on a main shaft of a machine tool and rotated, and the measurement accuracy of the measuring part of the measuring rod member with respect to the center axis of the main shaft is non-contact. In the method of measuring the accuracy of a machine tool to measure, when the measuring rod member is mounted on the main shaft, an outer shape of a measuring portion of the measuring rod member is formed so as to be eccentric with respect to a center axis of the main shaft, Two non-contact type distance measuring sensors are installed in radial directions orthogonal to each other so as to be directed to the measuring portion of the measuring rod member, and measurement obtained by the two non-contact type distance measuring sensors during rotation of the main shaft. Lissajous figure to be measured obtained by measuring outputs from the two non-contact type distance measuring sensors on the display unit of the display control device while rotating the main shaft, while guiding the output to the X and Y input units of the display control device. Displaying the measured Lissajous figure and the reference circular Lissajous figure in the case where there is no rotation fluctuation to measure the rotation fluctuation accuracy of the spindle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2196295A JP2716249B2 (en) | 1990-07-26 | 1990-07-26 | Machine tool accuracy measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2196295A JP2716249B2 (en) | 1990-07-26 | 1990-07-26 | Machine tool accuracy measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0482651A JPH0482651A (en) | 1992-03-16 |
| JP2716249B2 true JP2716249B2 (en) | 1998-02-18 |
Family
ID=16355430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2196295A Expired - Fee Related JP2716249B2 (en) | 1990-07-26 | 1990-07-26 | Machine tool accuracy measurement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2716249B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0671049U (en) * | 1993-03-10 | 1994-10-04 | 東京部品工業株式会社 | Lubricating oil out detector on sliding surface |
| JP5862381B2 (en) * | 2012-03-13 | 2016-02-16 | 豊和工業株式会社 | Vibration tool for measuring machine rigidity of machine tool and method for measuring machine rigidity of machine tool |
| CN106840658B (en) * | 2017-03-03 | 2019-06-28 | 广东捷信科技服务有限公司韶关分公司 | A kind of transmission detection device for recreational machine |
| CN107470983A (en) * | 2017-07-24 | 2017-12-15 | 昆山国立传动机械有限公司 | A kind of high-precision calibrating fitting center of circle solving device and method |
| CN114102258B (en) * | 2021-11-18 | 2022-09-13 | 江苏大卫精工科技有限公司 | Machine tool position degree detection method and device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5537957A (en) * | 1978-09-11 | 1980-03-17 | Hiromi Ogasawara | Centering unit |
| JPH01222846A (en) * | 1988-03-02 | 1989-09-06 | Mazda Motor Corp | Automatic tool changer |
-
1990
- 1990-07-26 JP JP2196295A patent/JP2716249B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0482651A (en) | 1992-03-16 |
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