JP5219480B2 - Workpiece machining method - Google Patents

Workpiece machining method Download PDF

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JP5219480B2
JP5219480B2 JP2007314928A JP2007314928A JP5219480B2 JP 5219480 B2 JP5219480 B2 JP 5219480B2 JP 2007314928 A JP2007314928 A JP 2007314928A JP 2007314928 A JP2007314928 A JP 2007314928A JP 5219480 B2 JP5219480 B2 JP 5219480B2
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workpiece
work
mounting base
contact
reference block
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JP2009136954A (en
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政治 鈴木
慶 中村
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Makino J Co Ltd
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Description

本発明は、ワーク取付台に取り付けたワークを加工する数値制御工作機械のワーク加工方法に関する。 The present invention relates to a numerically controlled machine tool machining a workpiece how to machine the workpiece mounted on the workpiece mount.

数値制御工作機械によりワークを加工する場合、加工の基準とする位置を求め、求めた位置に基づいてワーク座標系の原点を設定し、ワークの加工を行う。一般的に数値制御工作機械の主軸にタッチプローブ等の測定手段を装着し、ワーク測定機能によってテーブルやワーク取付具に取り付けられたワークの加工の基準とする位置を求める。   When a workpiece is machined by a numerically controlled machine tool, a position as a machining reference is obtained, the origin of the workpiece coordinate system is set based on the obtained position, and the workpiece is machined. In general, a measuring means such as a touch probe is attached to the spindle of a numerically controlled machine tool, and a position to be used as a reference for processing a workpiece attached to a table or a workpiece fixture is obtained by a workpiece measuring function.

特許文献１は、ワーク取付台に取り付けられたワークの心出しを行う際、まず、主軸にタッチプローブを装着し、予め設定されているワーク心出しパターンの中から作業者が所望するワーク心出しパターンを選択すると、そのワーク心出しパターンの案内画面が表示され、その案内画面に従って作業者が測定することで心出し位置が求まり原点設定される数値制御装置を開示している。特許文献２は、３つの位置検出器を用い、Ｘ、Ｙの直交２軸方向の直動とそのＸＹ平面内でθ方向に回転するテーブル上にワークを載置し、このワークの予め登録された特定面の位置検出を位置検出器により行い、この位置検出器からの出力信号に基づいてワークのテーブル上における位置ずれ量を算出し、算出された位置ずれ量を解消するようにテーブルを駆動するための制御信号を演算制御部からテーブルに出力し、テーブル内の予め決められた定点からの位置を修正するようにした心出し装置を開示している。   In Patent Document 1, when centering a workpiece mounted on a workpiece mounting base, first, a touch probe is attached to the spindle, and a workpiece centering desired by an operator is selected from preset workpiece centering patterns. When a pattern is selected, a guidance screen for the workpiece centering pattern is displayed, and a numerical control device is disclosed in which the centering position is obtained by setting the origin by measuring by the operator according to the guidance screen. Patent Document 2 uses three position detectors, places a workpiece on a table that rotates in the θ direction within the XY plane, and linearly moves X and Y in two orthogonal axes. The position of the specific surface is detected by the position detector, the amount of position deviation on the table of the workpiece is calculated based on the output signal from this position detector, and the table is driven to eliminate the calculated amount of position deviation A centering device is disclosed in which a control signal for output is output from a calculation control unit to a table, and a position from a predetermined fixed point in the table is corrected.

特開平１−３０１０４２号公報Japanese Patent Laid-Open No. 1-301042 特開昭５９−１５２０４６号公報JP 59-152046 A

特許文献１の技術は、ワーク座標系の原点設定作業を極力自動化したものであるが、数値制御工作機械でワークを加工する場合、加工に先立って主軸にタッチプローブを着脱しなければならず、工具とタッチプローブの交換時間及びタッチプローブによる計測時間が必要となる。従って、非加工時間が延び生産性が悪いという問題がある。   The technique of Patent Document 1 automates the origin setting work of the workpiece coordinate system as much as possible, but when machining a workpiece with a numerically controlled machine tool, the touch probe must be attached to and detached from the spindle prior to machining, An exchange time between the tool and the touch probe and a measurement time by the touch probe are required. Therefore, there is a problem that non-processing time is extended and productivity is poor.

特許文献２の技術は、１つの位置検出器でＹ軸方向の位置ずれを検出し、他の２つの位置検出器でＸ軸方向およびθ方向の位置ずれを検出しており、そのずれ量分、Ｘ、Ｙ、θ方向にテーブルを移動させて心出しをしている。この方法も装置が複雑になったり、Ｘ、Ｙ、θ方向へのテーブルの移動時間が必要となり、非加工時間が延び生産性が悪いという問題がある。   The technique of Patent Document 2 detects a positional shift in the Y-axis direction with one position detector, and detects a positional shift in the X-axis direction and the θ direction with the other two position detectors. The table is centered by moving the table in the X, Y, and θ directions. This method also has a problem that the apparatus becomes complicated and time for moving the table in the X, Y, and θ directions is required, and the non-processing time is extended and the productivity is poor.

本発明は従来技術の問題点を解決することを課題としており、本発明の目的は、ワーク取付台に取り付けられたワークの加工の基準とする位置を求める装置を簡単化し、かつ、ワーク座標系の原点を設定するまでの時間を短縮して、ワークの加工の生産性を向上させるワーク加工方法を提供することである。 An object of the present invention is to solve the problems of the prior art, and an object of the present invention is to simplify an apparatus for obtaining a position to be used as a reference for machining a workpiece mounted on a workpiece mounting base, and to provide a workpiece coordinate system. by shortening the time to set the origin, it is to provide a workpiece machining how to improve the productivity of machining of the workpiece.

本発明によれば、主軸に装着された工具とワーク取付台に取り付けられたワークとを相対移動させてワークを加工する数値制御工作機械のワーク加工方法において、前記ワークを当接させる基準ブロックを前記ワーク取付台に設け、前記基準ブロックに当接されるワークの側面を測定する位置測定手段を前記ワーク取付台に設け、前記基準ブロックのワークを当接させる基準面の形状及び位置を予め記憶し、寸法が既知のマスターピースを前記基準ブロックの基準面に当接させて前記ワーク取付台に取り付け、前記位置測定手段の測定子を前記マスターピースの側面に当接させて前記マスターピースを測定し、該測定値を予め記憶し、前記ワークを前記基準ブロックの基準面に当接させて前記ワーク取付台に取り付け、前記位置測定手段の測定子を前記ワークの側面に当接させて前記ワークを測定し、前記記憶したマスターピースの測定値と前記ワークの測定値、および両測定値の差に対する予め定められたマスターピースの中心位置とワークの中心位置との関係から前記ワーク取付台に対する前記ワークの位置を求め、前記求めたワークの位置に基づいてワーク座標系の原点を設定し前記ワークを加工するワーク加工方法が提供される。 According to the present invention, in a workpiece processing method for a numerically controlled machine tool that processes a workpiece by relatively moving a tool mounted on a spindle and a workpiece mounted on a workpiece mounting base, a reference block for contacting the workpiece is provided. Position measuring means provided on the work mounting base and measuring the side surface of the work abutting on the reference block is provided on the work mounting base, and the shape and position of the reference surface for contacting the work of the reference block are stored in advance. Then, a master piece having a known size is brought into contact with the reference surface of the reference block and attached to the work mounting base, and a measuring piece of the position measuring means is brought into contact with a side surface of the master piece to measure the master piece, Measurement values are stored in advance, the work is brought into contact with the reference surface of the reference block and attached to the work mounting base, and the position measuring unit measures the measurement value. The workpiece is measured by bringing a child into contact with the side surface of the workpiece, the measured value of the stored master piece, the measured value of the workpiece, and the center position of the master piece and the center of the workpiece determined in advance for the difference between the measured values. A workpiece machining method is provided in which the position of the workpiece relative to the workpiece mounting base is obtained from the relationship with the position, the origin of the workpiece coordinate system is set based on the obtained workpiece position, and the workpiece is machined.

寸法が既知のマスターピースを基準ブロックの基準面に当接させ、ワーク取付台に設けられた位置測定手段により該マスターピースの側面を測定してその測定値を予め記憶し、該マスターピースの測定値とワークの測定値との差を用いてワーク取付台に対するワークの位置が演算によって求まり、求めたワークの位置に基づいてワーク座標系の原点が設定される。   A master piece having a known dimension is brought into contact with the reference surface of the reference block, the side surface of the master piece is measured by the position measuring means provided on the work mounting base, and the measured value is stored in advance. The position of the workpiece with respect to the workpiece mount is obtained by calculation using the difference from the measured value, and the origin of the workpiece coordinate system is set based on the obtained workpiece position.

本発明によれば、ワーク取付台にワークを取り付けた際、ワーク取付台に設けられた位置測定手段のワーク側面への当接動作により、ワーク取付台に対するワークの位置を求めることができるようにしたので、非加工時間を極力少なくしてワークの加工の生産性を向上することができた。また、装置構成を簡単化することができた。   According to the present invention, when a workpiece is mounted on the workpiece mounting base, the position of the workpiece relative to the workpiece mounting base can be obtained by the contact operation of the position measuring means provided on the workpiece mounting base with the side surface of the workpiece. As a result, the non-machining time was reduced as much as possible to improve the work machining productivity. Moreover, the apparatus configuration could be simplified.

以下、添付図面を参照して、本発明のワーク加工方法及び数値制御工作機械並びにワーク取付具の好ましい実施の形態を説明する。まず、第1の実施の形態を図１及び図２を用いて説明する。数値制御工作機械１のベッド３上にコラム５及びテーブル７が設けられ、コラム５には主軸頭９が設けられ、主軸頭９には主軸１１が回転可能に支持され、主軸１１とテーブル７とはＸ、Ｙ、Ｚの３軸方向に相対移動可能に構成されている。その相対移動は数値制御装置５７によって制御される。   Preferred embodiments of a workpiece machining method, a numerically controlled machine tool, and a workpiece fixture according to the present invention will be described below with reference to the accompanying drawings. First, a first embodiment will be described with reference to FIGS. A column 5 and a table 7 are provided on the bed 3 of the numerically controlled machine tool 1, a spindle head 9 is provided on the column 5, and a spindle 11 is rotatably supported on the spindle head 9. Is configured to be relatively movable in three axial directions of X, Y, and Z. The relative movement is controlled by the numerical controller 57.

テーブル７上にはワーク取付具１３が固定されており、ワーク取付具１３はワーク取付台としてのイケール１５を有している。イケール１５のワーク取付面１７には断面が円形のワーク１９の側面を当接させる基準ブロック２１とワーク１９をイケール１５にクランプする固定手段２３が設けられている。本実施の形態では、所定の間隔をあけられた２つの円柱状の基準ブロック２１と、ワーク１９の端面をイケール１５のワーク取付面１７に押圧する３つの油圧式の固定手段２３を用いている。尚、主軸１１の先端には工具２７が装着される。図１において、２つの円柱状の基準ブロック２１に代えて、２つの角柱状の基準ブロックを、例えば、基準面が水平に対して右上がり４５°及び左上がり４５°に谷形に配置したものを用いたり（図４参照）、又は９０°の開き角を有するＶブロックを開き角を上向きにして配置したものを用いることもできる（図３参照）。   A workpiece fixture 13 is fixed on the table 7, and the workpiece fixture 13 has an scale 15 as a workpiece fixture. The work mounting surface 17 of the scale 15 is provided with a reference block 21 for contacting the side surface of the work 19 having a circular cross section and a fixing means 23 for clamping the work 19 to the scale 15. In the present embodiment, two cylindrical reference blocks 21 that are spaced apart from each other and three hydraulic fixing means 23 that press the end surface of the work 19 against the work mounting surface 17 of the scale 15 are used. . A tool 27 is attached to the tip of the main shaft 11. In FIG. 1, instead of the two cylindrical reference blocks 21, two prismatic reference blocks are arranged in a valley shape, for example, with the reference plane 45 ° upward and 45 ° upward relative to the horizontal. (See FIG. 4), or a V block having an opening angle of 90 ° arranged with the opening angle facing upward can be used (see FIG. 3).

次に位置測定手段３１を説明する。イケール１５のワーク取付面１７の上部に、ワーク取付面１７と平行に上下の矢印Ａ方向に進退可能に逆Ｌ字形の測定子３３が空気圧シリンダ等のアクチュエータ３５により案内、駆動されるように設けられる。測定子３３を逆Ｌ字形に形成するのは、測定子３３と並列に変位センサ３９を配置して、位置測定手段３１の矢印Ａ方向の長さを短くするためである。矢印Ａ方向は、２つの基準ブロック２１の中心と中心とを結ぶ直線の垂直２等分線の方向が好ましい。基準ブロックがＶブロックや谷形に配置された角柱の場合は、開き角の２等分線の方向が好ましい。円形ワークや正方形ワークの場合、その中心は必ず２等分線上にあるので、演算手段５３によるワーク１９の中心位置の演算を単純化することができる利点がある。   Next, the position measuring means 31 will be described. An inverted L-shaped probe 33 is provided above the workpiece mounting surface 17 of the scale 15 so as to be movable back and forth in the direction of the up and down arrows A in parallel with the workpiece mounting surface 17 so as to be guided and driven by an actuator 35 such as a pneumatic cylinder. It is done. The reason why the measuring element 33 is formed in an inverted L shape is that the displacement sensor 39 is arranged in parallel with the measuring element 33 to shorten the length of the position measuring means 31 in the arrow A direction. The direction of arrow A is preferably a direction of a perpendicular bisector of a straight line connecting the centers of the two reference blocks 21. In the case where the reference block is a rectangular column arranged in a V block or a valley shape, the direction of the bisector of the opening angle is preferable. In the case of a circular workpiece or a square workpiece, the center is always on a bisector, so there is an advantage that the calculation of the center position of the workpiece 19 by the calculation means 53 can be simplified.

測定子３３の下端にはワーク１９の側面と当接する接触部３７を有する。接触部３７の形状は、本実施の形態では図示のように三角柱を採用したが、被測定部に応じて平板や球形状や針状のものを採用することもできる。測定子３３の上下の矢印Ａ方向の変位を測定する変位センサ３９が設けられる。本実施の形態では、測定子３３との間隙距離を測定する渦電流式の非接触センサを用いている。他の形式の非接触センサや接触式の変位センサを用いることもでき、変位センサ３９の取り付け位置も本実施の形態の位置に限らない。測定子３３、アクチュエータ３５、変位センサ３９は、接触部３７だけを露出させてカバー４１で覆われている。カバー４１の下部に開閉扉を設け、通常は測定子３３、アクチュエータ３５、変位センサ３９の全てが覆われ、測定時のみカバー４１の扉が開き接触部３７がワーク１９に当接する構成にしてもよい。   At the lower end of the measuring element 33, there is a contact portion 37 that contacts the side surface of the work 19. As the shape of the contact portion 37, a triangular prism is employed as shown in the present embodiment, but a flat plate, a spherical shape, or a needle shape may be employed depending on the portion to be measured. A displacement sensor 39 for measuring the displacement of the probe 33 in the direction of the arrow A above and below is provided. In this embodiment, an eddy current type non-contact sensor that measures the gap distance from the probe 33 is used. Other types of non-contact sensors and contact-type displacement sensors can also be used, and the attachment position of the displacement sensor 39 is not limited to the position of the present embodiment. The probe 33, the actuator 35, and the displacement sensor 39 are covered with a cover 41 with only the contact portion 37 exposed. An opening / closing door is provided at the lower part of the cover 41. Normally, all of the probe 33, the actuator 35, and the displacement sensor 39 are covered, and the door of the cover 41 is opened only at the time of measurement so that the contact portion 37 contacts the workpiece 19. Good.

次にワーク取付具１３にワーク１９を取り付け、ワーク１９の加工の基準となる位置を求め、ワーク１９の加工を行う一連の動作について説明する。本実施の形態ではワーク１９の基準となる位置は断面が円形のワークなのでワーク１９の中心位置である。まず、基準ブロック２１の中心位置を測定しておき、基準ブロック２１の既知の寸法と共にＸＹ平面における基準ブロック２１を表す円の数式を記憶手段５１に記憶しておく。基準ブロック２１が谷形に配置された角柱やＶブロックの場合は、ＸＹ平面におけるワーク１９の側面を当接させる面を表す直線の数式を記憶する。基準面の形状及び位置をこのように数式で記憶してもよいし、基準面を定義するデータテーブルの形で記憶してもよい。さらに、測定子３３の接触部３７の位置を測定しておき、そのときの変位センサ３９の出力値と共に記憶手段５１に記憶しておく。そして、ワーク１９をイケール１５のワーク取付面１７に押し当てると共に基準ブロック２１に当接させ、固定手段２３によってワーク１９をイケール１５に固定する。   Next, a series of operations for attaching the workpiece 19 to the workpiece fixture 13, obtaining a position serving as a reference for machining the workpiece 19, and machining the workpiece 19 will be described. In the present embodiment, the reference position of the work 19 is the center position of the work 19 because the work has a circular cross section. First, the center position of the reference block 21 is measured, and a mathematical formula of a circle representing the reference block 21 on the XY plane is stored in the storage unit 51 together with the known dimensions of the reference block 21. In the case where the reference block 21 is a prism or V block arranged in a valley shape, a straight line expression that represents a surface that abuts the side surface of the work 19 on the XY plane is stored. The shape and position of the reference plane may be stored as mathematical formulas as described above, or may be stored in the form of a data table that defines the reference plane. Further, the position of the contact portion 37 of the probe 33 is measured and stored in the storage means 51 together with the output value of the displacement sensor 39 at that time. Then, the work 19 is pressed against the work mounting surface 17 of the scale 15 and brought into contact with the reference block 21, and the work 19 is fixed to the scale 15 by the fixing means 23.

次にアクチュエータ３５により測定子３３をワーク１９に接近動作させ、接触部３７がワーク１９の側面に当接したときの変位センサ３９の測定値を演算手段５３へ出力する。演算手段５３は、記憶手段５１から基準ブロック２１の形状と位置のデータ並びに測定子３３の接触部３７の位置のデータを受け取り、ワーク１９と接する基準面を表す２つの円の数式とワーク側面の1点の位置データとからこのワーク１９の中心位置を求めることができる。原点設定手段５５は、この求めた中心位置を原点とするようにワーク座標系を設定する。本実施の形態では記憶手段５１、演算手段５３、原点設定手段５５は数値制御装置５７に組み込まれており、数値制御装置５７は与えられた加工プログラムによりワーク１９を加工するよう数値制御工作機械１を制御する。記憶手段５１、演算手段５３は、機械制御装置やパソコン等他の装置に組み込まれ、求めたワーク１９の中心位置を数値制御装置５７の原点設定手段５５へ送出してもよい。   Next, the actuator 33 moves the probe 33 closer to the workpiece 19, and outputs the measured value of the displacement sensor 39 when the contact portion 37 contacts the side surface of the workpiece 19 to the computing means 53. The calculation means 53 receives the data of the shape and position of the reference block 21 and the data of the position of the contact portion 37 of the measuring element 33 from the storage means 51, and formulas of two circles representing the reference surface in contact with the work 19 and the side surface of the work The center position of the work 19 can be obtained from the position data of one point. The origin setting means 55 sets the work coordinate system so that the obtained center position is the origin. In the present embodiment, the storage means 51, the calculation means 53, and the origin setting means 55 are incorporated in the numerical control device 57, and the numerical control device 57 performs the numerical control machine tool 1 so as to machine the workpiece 19 according to a given machining program. To control. The storage unit 51 and the calculation unit 53 may be incorporated in another device such as a machine control device or a personal computer, and send the obtained center position of the workpiece 19 to the origin setting unit 55 of the numerical control device 57.

第２の実施の形態を図３を用いて説明する。基準ブロックとして開き角９０°のＶブロック６１を開き角を上向きにしてイケール１５に設け、Ｖブロック６１にマスターピース６３を載置して固定する。本実施の形態のマスターピース６３は寸法が既知で断面が円形をしている。測定子３３の接触部３７をマスターピース６３の側面に当接させ、マスターピース６３の側面上の点Ｂを測定し、その測定値を記憶手段５１へ記憶する。また、Ｖブロック６１の形状及び位置、すなわち、開き角が９０°であり、２つの斜面のＸＹ平面における直線の数式が既知であり、さらに、マスターピース６３の寸法が既知であることから、加工すべきワーク１９をＶブロック６１に載置して固定したときの測定子３３によるワーク１９の側面上の点Ｃの測定値と記憶したマスターピース６３の測定値との差Ｄに対して、マスターピース６３の中心位置Ｅとワーク１９の中心位置Ｆとがどんな関係になるかを予め関数にして演算手段５３に入力しておく。そして、ワーク１９の側面を測定すれば、演算手段５３により前記関数とワーク側面の１点の位置データとからイケール１５に対するワーク１９の中心位置Ｆを求めることができる。求めたワーク１９の中心位置Ｆを原点設定手段５５によりワーク座標系の原点に設定し、与えられた加工プログラムによりワーク１９を加工する。   A second embodiment will be described with reference to FIG. As a reference block, a V block 61 having an opening angle of 90 ° is provided on the scale 15 with the opening angle facing upward, and a master piece 63 is placed on the V block 61 and fixed. The master piece 63 of this embodiment has a known dimension and a circular cross section. The contact portion 37 of the measuring element 33 is brought into contact with the side surface of the master piece 63, the point B on the side surface of the master piece 63 is measured, and the measured value is stored in the storage means 51. Further, since the shape and position of the V block 61, that is, the opening angle is 90 °, the mathematical formula of the straight line on the XY plane of the two inclined surfaces is known, and the dimensions of the master piece 63 are known, the machining is performed. With respect to the difference D between the measured value of the point C on the side surface of the workpiece 19 and the stored measured value of the master piece 63 by the probe 33 when the work 19 is placed and fixed on the V block 61, the master piece 63 The relationship between the center position E and the center position F of the workpiece 19 is input to the computing means 53 as a function in advance. If the side surface of the workpiece 19 is measured, the calculation means 53 can determine the center position F of the workpiece 19 with respect to the scale 15 from the function and the position data of one point on the side surface of the workpiece. The obtained center position F of the workpiece 19 is set as the origin of the workpiece coordinate system by the origin setting means 55, and the workpiece 19 is machined by a given machining program.

図４は、ワーク取付具１３に、円形のワーク１９の代わりにＸＹ平面における形状が正方形をした角柱状のワーク７１を取り付けた場合を示している。この場合も、位置測定手段３１でワーク７１のＸＹ平面における頂点Ｇの位置を測定し、記憶手段５１に記憶されている２つの角柱状の基準ブロック７３の基準面を表す２直線の数式から頂点Ｇと２直線の交点Ｈとの中点、すなわち、ワーク７１のＸＹ平面における正方形の対角線の交点Ｉの位置が演算手段５３により求まる。この位置をワーク７１の加工の基準としてワーク座標系の原点に設定すればよい。   FIG. 4 shows a case where a prismatic workpiece 71 having a square shape in the XY plane is attached to the workpiece fixture 13 instead of the circular workpiece 19. Also in this case, the position measuring unit 31 measures the position of the vertex G of the work 71 on the XY plane, and the vertex is calculated from the two straight line expressions representing the reference planes of the two prismatic reference blocks 73 stored in the storage unit 51. The calculation means 53 obtains the midpoint between the intersection point G of G and the two straight lines, that is, the position of the intersection point I of the square diagonal line on the XY plane of the work 71. This position may be set as the origin of the workpiece coordinate system as a reference for machining the workpiece 71.

このように本発明によれば、ワーク取付台にワークを取り付けるたびに数値制御工作機械の主軸にタッチプローブ等の測定手段を着脱したり、テーブルをＸ、Ｙ、θ方向に移動させて位置合わせをしたりしなくて済み、短時間でワーク座標系の原点を設定することができる。   As described above, according to the present invention, every time a workpiece is mounted on the workpiece mounting base, a measuring means such as a touch probe is attached to or detached from the spindle of the numerically controlled machine tool, or the table is moved in the X, Y, and θ directions for alignment. The origin of the work coordinate system can be set in a short time.

上述の実施の形態は、共に横形のマシニングセンタにワーク取付面が鉛直になったワーク取付具を設けた場合を示したが、本発明はこの構成に限らず、立形のマシニングセンタやその他の数値制御工作機械に水平なワーク取付面を有するワーク取付具、例えば、水平なパレット上面に横向きのＶブロックと位置測定手段を設け、ワークをＶブロックの基準面に当接させながらパレット上面に固定するような構成も含む。   In the above-described embodiments, a case has been described in which a workpiece attachment having a vertical workpiece attachment surface is provided on a horizontal machining center. However, the present invention is not limited to this configuration, and a vertical machining center or other numerical control is provided. A machine tool having a horizontal workpiece mounting surface on a machine tool, for example, a horizontal V block and a position measuring means are provided on a horizontal pallet upper surface, and the workpiece is fixed to the pallet upper surface while being in contact with the reference surface of the V block. Including other configurations.

本発明のワーク取付具の第１の実施の形態を示す正面図である。It is a front view which shows 1st Embodiment of the workpiece fixture of this invention. 図１のワーク取付具を備えた数値制御工作機械の側面図及びブロック図である。It is the side view and block diagram of a numerical control machine tool provided with the workpiece fixture of FIG. 本発明のワーク取付具の第２の実施の形態を示す要部の正面図である。It is a front view of the principal part which shows 2nd Embodiment of the workpiece attachment tool of this invention. 本発明のワーク取付具に角柱状のワークを取り付けたときの正面図である。It is a front view when a prismatic workpiece is attached to the workpiece fixture of the present invention.

符号の説明Explanation of symbols

１ 数値制御工作機械
１３ ワーク取付具
１５ イケール
１９ ワーク
２１ 基準ブロック
２３ 固定手段
３１ 位置測定手段
３３ 測定子
３５ アクチュエータ
３９ 変位センサ
５１ 記憶手段
５３ 演算手段
５５ 原点設定手段
５７ 数値制御装置 DESCRIPTION OF SYMBOLS 1 Numerically controlled machine tool 13 Work fixture 15 Escale 19 Work 21 Reference block 23 Fixing means 31 Position measuring means 33 Measuring element 35 Actuator 39 Displacement sensor 51 Storage means 53 Calculation means 55 Origin setting means 57 Numerical control device

Claims (1)

主軸に装着された工具とワーク取付台に取り付けられたワークとを相対移動させてワークを加工する数値制御工作機械のワーク加工方法において、
前記ワークを当接させる基準ブロックを前記ワーク取付台に設け、
前記基準ブロックに当接されるワークの側面を測定する位置測定手段を前記ワーク取付台に設け、
前記基準ブロックのワークを当接させる基準面の形状及び位置を予め記憶し、
寸法が既知のマスターピースを前記基準ブロックの基準面に当接させて前記ワーク取付台に取り付け、前記位置測定手段の測定子を前記マスターピースの側面に当接させて前記マスターピースを測定し、該測定値を予め記憶し、
前記ワークを前記基準ブロックの基準面に当接させて前記ワーク取付台に取り付け、前記位置測定手段の測定子を前記ワークの側面に当接させて前記ワークを測定し、
前記記憶したマスターピースの測定値と前記ワークの測定値、および両測定値の差に対する予め定められたマスターピースの中心位置とワークの中心位置との関係から前記ワーク取付台に対する前記ワークの位置を求め、
前記求めたワークの位置に基づいてワーク座標系の原点を設定し、前記ワークを加工するワーク加工方法。 In a workpiece machining method of a numerically controlled machine tool for machining a workpiece by relatively moving a tool mounted on a spindle and a workpiece mounted on a workpiece mounting base,
A reference block for contacting the workpiece is provided on the workpiece mounting base,
A position measuring means for measuring a side surface of the workpiece that is in contact with the reference block is provided on the workpiece mounting base,
Pre-store the shape and position of the reference surface with which the workpiece of the reference block contacts,
A master piece having a known size is brought into contact with a reference surface of the reference block and attached to the work mounting base, a measuring piece of the position measuring means is brought into contact with a side surface of the master piece, the master piece is measured, and the measured value Is stored in advance,
The work is brought into contact with the reference surface of the reference block and attached to the work mounting base, and the work piece of the position measuring means is brought into contact with the side surface of the work to measure the work,
Obtaining the position of the workpiece relative to the workpiece mounting base from the relationship between the center position of the workpiece and the measurement value of the stored master piece and the measurement value of the workpiece, and the center position of the predetermined master piece with respect to the difference between the two measurement values ,
A workpiece machining method for machining the workpiece by setting an origin of a workpiece coordinate system based on the obtained workpiece position.
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