JPH071292A - Work automatic measuring method for machining line - Google Patents

Work automatic measuring method for machining line

Info

Publication number
JPH071292A
JPH071292A JP14665293A JP14665293A JPH071292A JP H071292 A JPH071292 A JP H071292A JP 14665293 A JP14665293 A JP 14665293A JP 14665293 A JP14665293 A JP 14665293A JP H071292 A JPH071292 A JP H071292A
Authority
JP
Japan
Prior art keywords
work
measurement
measuring
workpiece
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.)
Granted
Application number
JP14665293A
Other languages
Japanese (ja)
Other versions
JP3111751B2 (en
Inventor
啓 ▲高▼橋
Hiroshi Takahashi
Toshiyuki Watanabe
敏行 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP05146652A priority Critical patent/JP3111751B2/en
Publication of JPH071292A publication Critical patent/JPH071292A/en
Application granted granted Critical
Publication of JP3111751B2 publication Critical patent/JP3111751B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To perform high-precise measurement of a work by using a machine tool as a measuring machine. CONSTITUTION:Measurement blocks 4, 14, 5, and 15 and a measuring block 6 for work of the same material as that of a work W are attached to each pallet 1 to which the work W is fixed. When each part of the work W is measured by means o the touch rope of a machine tool, the measurement surfaces of the measuring blocks 4, 14, 5, 15, and 6 are measured. From the actual measurements of each measurement surface and a preset reference coordinate value, an expansion contraction error correcting amount of a machine itself and that of the work W are approximately calculated. After according to the expansion contraction error correction amount, the actual measurements of each part of the work W are corrected, a corrected result is outputted as final measurements.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、NC工作機械を中心と
して構成された機械加工ラインにおいて、ワークの寸法
をインラインで測定する方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the dimension of a work piece in-line in a machining line constructed mainly of NC machine tools.

【0002】[0002]

【従来の技術】マシニングセンタ等の多自由度の工作機
械を中心として構成されて、内燃機関のシリンダヘッド
等の加工を行なう機械加工ラインにおいて、そのワーク
の穴位置や面位置等の測定を行なう場合には、加工ライ
ンの途中に測定ステージを設けるとともに、この測定ス
テージに三次元測定機等を据え付けるようにしている。
そして、上記のようにインラインでワークの測定を行う
場合には、測定機本体の温度変形やワークの温度変形等
による影響を極力回避して安定した高精度な測定結果を
得るために、少なくとも測定機を空調機能付きのカバー
で覆って恒温室構造とするなどの対策がとられている。
2. Description of the Related Art When measuring a hole position or a surface position of a workpiece in a machining line which is mainly constructed by a machine tool having many degrees of freedom such as a machining center and which processes a cylinder head of an internal combustion engine. In addition, a measurement stage is provided in the middle of the processing line, and a three-dimensional measuring machine or the like is installed on this measurement stage.
When performing measurement of the work in-line as described above, at least the measurement should be performed in order to obtain stable and highly accurate measurement results by avoiding the effects of temperature deformation of the measuring machine body, temperature deformation of the work, etc. as much as possible. Measures are taken such as covering the machine with a cover with an air conditioning function to create a temperature-controlled room structure.

【0003】[0003]

【発明が解決しようとする課題】上記のような機械加工
ラインにおいては、同一ラインで加工すべきワークの種
類の追加や変更、加工手順の変更等が往々にして発生
し、それに応じて加工ステージ(工程)の追加や入れ換
えによるライン編成の変更が余儀なくされることがあ
る。
In the above-mentioned machining line, the addition or change of the type of work to be machined on the same line, the change of the machining procedure, etc. often occur, and the machining stage is accordingly responded. The line knitting may be inevitably changed by adding (changing) the (process).

【0004】このような場合には、加工ステージの入れ
換え等に応じて先の測定ステージの位置も変更しなけれ
ばならず、例えば特定の加工ステージと測定ステージと
を位置的に入れ換えるためには大規模な工事が必要とな
り、柔軟性の面で必ずしも十分でない。
In such a case, it is necessary to change the position of the preceding measuring stage in accordance with the replacement of the processing stage. For example, it is large in order to replace the specific processing stage and the measuring stage in position. It requires large-scale construction and is not always sufficient in terms of flexibility.

【0005】その一方、上記の機械加工ラインのなかに
余剰(休止中)の工作機械が含まれているような場合、
その工作機械の位置と新たに設置したい測定ステージの
位置とが一致するようであれば、工作機械自体の多自由
度機能を有効利用してその工作機械自体を三次元測定機
として利用することも可能ではある。
On the other hand, in the case where the above machining line includes surplus (inactive) machine tools,
If the position of the machine tool and the position of the measurement stage you want to install are the same, you can use the machine tool itself as a coordinate measuring machine by effectively utilizing the multi-degree-of-freedom function. It is possible.

【0006】しかしながら、工作機械自体を測定機とし
て利用しようとすると、前述したように季節による機械
自体の温度変化やワークの温度変化が不可避であるため
に、測定精度の上でこれらの温度変化を無視することが
できず、高精度の測定結果が望めない。
However, when the machine tool itself is used as a measuring machine, the temperature change of the machine itself and the temperature change of the workpiece due to the season are unavoidable as described above, and therefore these temperature changes are taken into consideration in terms of measurement accuracy. It cannot be ignored, and high-precision measurement results cannot be expected.

【0007】本発明は以上のような背景のもとになされ
たもので、多自由度の工作機械を実質的に測定機として
理容しながらも高精度な測定を行えるようにした方法を
提供することを目的としている。
The present invention has been made under the background described above, and provides a method capable of performing highly accurate measurement while substantially accepting a machine tool having multiple degrees of freedom as a measuring machine. Is intended.

【0008】[0008]

【課題を解決するための手段】本発明は、パレット搬送
方式でワークを搬送しながらこのワークに対し各加工ス
テージのNC工作機械により加工を施す一方、特定の加
工ステージでワークの穴位置および面位置等の測定を行
う機械加工ラインのワーク自動測定方法であって、前記
パレットのそれぞれに、工作機械自体の三次元方向の伸
縮誤差補正量を算出するのに必要な測定面をもつ機械用
測定ブロックと、ワークの伸縮誤差補正量を算出するの
に必要な測定面をもってワークと同材質のワーク用測定
ブロックとを予め取り付けておく。
According to the present invention, while a work is conveyed by a pallet conveyance method, the work is machined by an NC machine tool of each machining stage, and at the same time, the hole position and surface of the work are machined at a particular machining stage. A method for automatically measuring a workpiece on a machining line for measuring a position, etc., which is for a machine having a measurement surface necessary to calculate the expansion / contraction error correction amount of the machine tool itself in each of the pallets. The block and the work measuring block for the work having the same material as the work are attached in advance with the measurement surface necessary for calculating the expansion / contraction error correction amount of the work.

【0009】そして、前記工作機械の主軸に装着された
測定用プローブを測定用NCプログラムに基づいて動か
して、ワークの所定の穴位置および面位置等とともに前
記各測定ブロックの測定面位置を測定し、前記各測定ブ
ロックの測定面の実測値と予め設定されたそれらの測定
面の基準座標値とに基づいて工作機械の各方向の伸縮誤
差補正量とワークの伸縮誤差補正量とを算出し、これら
の工作機械およびワークの伸縮誤差補正量に応じて前記
ワークの穴位置および面位置の実測値を補正した上で測
定値として出力することを特徴としている。
Then, the measuring probe mounted on the spindle of the machine tool is moved based on the measuring NC program, and the measuring surface position of each measuring block is measured together with the predetermined hole position and surface position of the work. The expansion / contraction error correction amount in each direction of the machine tool and the expansion / contraction error correction amount of the workpiece are calculated based on the actual measurement values of the measurement surfaces of the respective measurement blocks and the reference coordinate values of those measurement surfaces set in advance, It is characterized in that the measured values of the hole position and the surface position of the work are corrected according to the expansion / contraction error correction amounts of the machine tool and the work, and then output as measured values.

【0010】[0010]

【作用】この方法によると、各測定ブロックの測定面に
あらわれた誤差量をもとに工作機械の各方向の伸縮誤差
補正量とワークの伸縮誤差補正量とを比例演算等により
近似的に算出し、これらの伸縮誤差補正量に応じてワー
クの穴位置や面位置等に関する実測値を補正して測定値
とすることにより、工作機械を測定機として使用しなが
らも高精度な測定結果が得られることになる。
According to this method, the expansion / contraction error correction amount in each direction of the machine tool and the expansion / contraction error correction amount of the workpiece are approximately calculated by proportional calculation or the like based on the error amount appearing on the measurement surface of each measurement block. However, by correcting the actual measurement values related to the hole position and surface position of the workpiece according to these expansion / contraction error correction amounts to obtain measured values, highly accurate measurement results can be obtained while using the machine tool as a measuring machine. Will be done.

【0011】[0011]

【実施例】図2は本発明の一実施例を示す図で、内燃機
関のシリンダヘッドの機械加工ラインの例を示してい
る。
FIG. 2 is a view showing an embodiment of the present invention and shows an example of a machining line for a cylinder head of an internal combustion engine.

【0012】図2に示すように、加工ステージS−1よ
りも前段のいくつかの前工程で機械加工が施されたワー
クは、加工ステージS−1〜S−3においてさらに別の
機械加工が施され、その後段の測定ステージM−1およ
びM−2においてワークは加工された穴や面が所定寸法
に仕上がっているかどうか測定される。そして、測定ス
テージM−1およびM−2を経たワークは再び加工ステ
ージS−4以降の各加工ステージS−4,S−5…にお
いて所定の機械加工が施される。
As shown in FIG. 2, a workpiece machined in several pre-processes before the machining stage S-1 is subjected to further machining in the machining stages S-1 to S-3. The workpiece is then subjected to measurement at the subsequent measuring stages M-1 and M-2 to determine whether or not the machined hole or surface has a predetermined size. Then, the work that has passed through the measurement stages M-1 and M-2 is again subjected to predetermined machining in each of the processing stages S-4, S-5, ... After the processing stage S-4.

【0013】前記ワークWは、図1に示すようにパレッ
ト1に対し基準ブロック2とクランパー3等により予め
位置決め固定されていて、パレット1ごと図2の各ステ
ージ間を搬送されるとともに、パレット1は一つのワー
クWの加工が終了するごとにそのワークWを取り外した
上で循環再使用される。
As shown in FIG. 1, the work W is preliminarily positioned and fixed to the pallet 1 by a reference block 2 and a clamper 3, and is conveyed between the stages shown in FIG. Each time the processing of one work W is completed, the work W is removed and then recycled.

【0014】一方、前記パレット1には、一対の素片4
a,4bの互いに共通の面m1,m2およびm11,m
12を内側と外側とになるように組み合わせた一対の機
械用測定ブロック4,14と、台形状の一対の機械用測
定ブロック5,15とが固定されているほか、パレット
1の上方には一対の穴H1,H2が形成されたワークW
と同材質のワーク用測定ブロック6が固定されている。
On the other hand, the pallet 1 has a pair of pieces 4
a, 4b common faces m1, m2 and m11, m
A pair of mechanical measuring blocks 4 and 14 in which 12 are combined inside and outside and a pair of trapezoidal mechanical measuring blocks 5 and 15 are fixed, and a pair above the pallet 1 is provided. Work W with holes H1 and H2
The work measuring block 6 made of the same material as is fixed.

【0015】そして、これらの各測定ブロック4,1
4,5,15および6は各測定面の位置を測定すること
により、後述するように測定ステージM−1,M−2で
ワークWの穴位置や面位置等を測定するにあたって、そ
の測定値の伸縮誤差補正量を算出する際に使用される。
Then, each of these measurement blocks 4, 1
4, 5, 15 and 6 measure the positions of the respective measurement surfaces to measure the hole positions and surface positions of the workpiece W on the measurement stages M-1 and M-2 as described later. It is used when calculating the expansion / contraction error correction amount of.

【0016】また、前記加工ステージS−1〜S−5お
よび測定ステージM−1,M−2は、図3に示すよう
に、タレット型のNC工作機械7と、そのNC工作機械
7のスピンドルヘッド8の自動交換を行う自動ヘッド交
換装置9と、前記ワークWをパレット1ごと位置決め固
定して、そのワークWの姿勢を所定の加工姿勢に変更す
るチルト−インデックス装置10とを中心として構成さ
れている。
Further, the machining stages S-1 to S-5 and the measuring stages M-1 and M-2 are, as shown in FIG. 3, a turret type NC machine tool 7 and a spindle of the NC machine tool 7. An automatic head changing device 9 for automatically changing the head 8 and a tilt-index device 10 for positioning and fixing the work W together with the pallet 1 and changing the position of the work W to a predetermined processing position are mainly constituted. ing.

【0017】そして、各加工ステージS−1〜S−5で
加工を行う際には、チルト−インデックス装置10を搬
送装置11側にシフトさせて、該搬送装置11によって
搬送されてきたワークWをチルト−インデックス装置1
0上に受け取って位置決めクランプした上で、そのチル
ト−インデックス機能によりワークWを所定の加工姿勢
に位置決めする。
Then, when machining is performed on each of the machining stages S-1 to S-5, the tilt-index device 10 is shifted to the carrier device 11 side, and the work W carried by the carrier device 11 is moved. Tilt-index device 1
0, the workpiece W is positioned and clamped, and then the work W is positioned in a predetermined processing posture by the tilt-index function.

【0018】その一方、NC型工作機械7は自動ヘッド
交換装置9のマガジン12との間でスピンドルヘッド8
の入れ換えを行いながら、そのタレットヘッド上のスピ
ンドルヘッド8を適宜加工位置に割り出して、チルト−
インデックス装置10上のワークWに対して穴加工や面
削り加工等を施すことになる。
On the other hand, the NC type machine tool 7 is connected to the magazine 12 of the automatic head changing device 9 by the spindle head 8
While replacing the turret head, the spindle head 8 on the turret head is appropriately indexed to the machining position, and the tilt-
The work W on the index device 10 is subjected to hole processing, chamfering processing, or the like.

【0019】さらに、前記測定ステージM−1,M−2
においては、複数のスピンドルヘッド8,8…のなかに
測定用プローブとしてのタッチプローブ13が装着され
たものを予め含ませておくことにより、NC工作機械7
の多自由度機能を利用してワークWの穴位置や面位置等
を測定することができる。
Further, the measuring stages M-1 and M-2
In the above, by including in advance a plurality of spindle heads 8, 8 ... Incorporating a touch probe 13 as a measuring probe, the NC machine tool 7
The hole position, surface position, etc. of the work W can be measured using the multi-degree-of-freedom function.

【0020】次に、前記測定ステージM−1,M−2で
の作業内容を順を追って詳細に説明する。
Next, the work contents of the measuring stages M-1 and M-2 will be described in detail step by step.

【0021】図3および図4に示すように、測定ステー
ジM−1,M−2のNC工作機械7のNC制御装置16
には予め測定用NCプログラムがダウンロードされてい
ることから、図3のチルト−インデックス装置10上に
ワークWが位置決め固定されると、NC工作機械7はス
ピンドルヘッド8に装着されたタッチプローブ13をワ
ークWに順次当てて穴位置や面位置等を測定することに
なるのであるが、それに先立って次のような処理を実行
する。
As shown in FIGS. 3 and 4, the NC controller 16 of the NC machine tool 7 of the measuring stages M-1 and M-2.
Since the NC program for measurement is downloaded in advance, the NC machine tool 7 causes the touch probe 13 mounted on the spindle head 8 to move when the workpiece W is positioned and fixed on the tilt-index device 10 in FIG. The hole position, the surface position, and the like are sequentially applied to the work W, and the following processing is executed prior to that.

【0022】すなわち、最初に図1の機械用測定ブロッ
ク4の測定面m1,m2にそれぞれタッチプローブ13
を一回ずつ当てて各測定面m1,m2のX方向の位置を
測定するとともに、その上端の測定面f1のY方向の位
置を測定する(図4のステップS1)。同様に、もう一
方の機械用測定ブロック14の各測定面m11,m12
およびf2を測定する(ステップS2)。
That is, first, the touch probe 13 is attached to each of the measurement surfaces m1 and m2 of the mechanical measurement block 4 shown in FIG.
Is applied once to measure the positions of the measurement surfaces m1 and m2 in the X direction, and the position of the upper end of the measurement surface f1 in the Y direction is measured (step S1 in FIG. 4). Similarly, the measurement surfaces m11, m12 of the other machine measurement block 14
And f2 are measured (step S2).

【0023】そして、前記測定面m1,m2の実測値の
平均座標値と、同じく測定面m11,m12の平均座標
値とを求めた上、各測定面m1,m2とm11,m12
の基準座標値として予め設定された値と比較してその差
(ずれ量)を求め、さらに比例演算等を行って工作機械
7自体のX方向の近似的な伸縮誤差補正量を算出する。
Then, the average coordinate value of the measured values of the measurement surfaces m1 and m2 and the average coordinate value of the measurement surfaces m11 and m12 are obtained, and then the measurement surfaces m1 and m2 and m11 and m12 are obtained.
The difference (displacement amount) is calculated by comparing with a preset coordinate value as the reference coordinate value, and a proportional calculation or the like is further performed to calculate an approximate expansion / contraction error correction amount of the machine tool 7 itself in the X direction.

【0024】同様に、前記測定面f1,f2同士の実測
値の平均座標値を求めた上、その測定面f1,f2の基
準座標値として予め設定された値と比較してその差を求
め、さらに比例演算等を行って工作機械7自体のY方向
の近似的な伸縮誤差補正量を算出する(ステップS
3)。
Similarly, after obtaining the average coordinate value of the actual measurement values of the measurement surfaces f1 and f2, the difference is obtained by comparing with the value preset as the reference coordinate value of the measurement surfaces f1 and f2. Further, a proportional calculation or the like is performed to calculate an approximate expansion / contraction error correction amount in the Y direction of the machine tool 7 itself (step S
3).

【0025】続いて、前記機械用測定ブロック5,15
の測定面a1,a2の位置を測定し、その測定面a1,
a2の実測値の平均座標値を求めた上で、その測定面a
1,a2の基準座標値として予め設定された値と比較し
て差を求め、さらに比例演算等を行って工作機械7自体
のZ方向の近似的な伸縮誤差補正量を算出する(ステッ
プS4,S5)。
Subsequently, the measuring blocks 5 and 15 for the machine
The positions of the measurement surfaces a1 and a2 of
After obtaining the average coordinate value of the actual measurement value of a2, the measured surface a
The difference is calculated by comparing the reference coordinate values of 1 and a2 with preset values, and proportional calculation or the like is performed to calculate an approximate expansion / contraction error correction amount of the machine tool 7 itself in the Z direction (step S4). S5).

【0026】さらに、前記ワーク用測定ブロック6につ
いて、二つの穴H1,H2のX方向およびY方向でのピ
ッチをそれぞれ測定し、これらのピッチの実測値と予め
設定されている基準寸法とを比較しつつ比例演算等を行
って、ワークW自体のX方向およびY方向での伸縮誤差
補正量を近似的に算出する(ステップS6,S7)。
Further, with respect to the work measuring block 6, the pitches of the two holes H1 and H2 in the X and Y directions are measured, and the measured values of these pitches are compared with preset reference dimensions. While performing the proportional calculation and the like, the expansion / contraction error correction amount of the work W itself in the X direction and the Y direction is approximately calculated (steps S6 and S7).

【0027】以上のようにして各測定ブロック4,1
4,5,15および6について各測定面の位置測定が終
了したならば、ワークWのうち測定すべき穴や面にタッ
チプローブ13を当てて、それらの穴位置や面位置等を
測定する(ステップS8)。
As described above, each measurement block 4, 1
When the measurement of the position of each measurement surface of 4, 5, 15 and 6 is completed, the touch probe 13 is applied to the hole or surface of the workpiece W to be measured to measure the hole position or surface position ( Step S8).

【0028】そして、機械座標系からワーク座標系に座
標変換してワーク座標系を設定した上で、上記の測定に
よって得られたワークWの穴位置や面位置等の実測値
と、先に求めた機械自体のX,Y,Z方向の伸縮誤差補
正量およびワークW自体のX,Y方向の伸縮誤差補正量
との加減算を行って、実質的にワークW各部の実測値を
各伸縮誤差補正量で補正して最終的なワークの測定値を
算出する(ステップS9,S10)。
Then, after the machine coordinate system is converted into the work coordinate system and the work coordinate system is set, the measured values of the hole position, the surface position, etc. of the work W obtained by the above-mentioned measurement are first obtained. The expansion / contraction error correction amount in the X, Y, Z directions of the machine itself and the expansion / contraction error correction amount in the X, Y directions of the work W itself are added / subtracted, and the actual measurement values of each part of the work W are substantially corrected for each expansion / contraction error. The final measured value of the work is calculated by correcting the quantity (steps S9 and S10).

【0029】これにより、最終的に求められたワークW
の穴位置や面位置等の測定値には、温度変化による工作
機械7自体の伸縮誤差やワークW自体の伸縮誤差が考慮
されているので、測定精度の向上と測定結果の信頼性が
向上することになる。
As a result, the work W finally obtained is obtained.
Since the measurement values of the hole position, the surface position, etc. of the machine tool take into account the expansion / contraction error of the machine tool 7 itself and the expansion / contraction error of the work W itself due to the temperature change, the measurement accuracy is improved and the reliability of the measurement result is improved. It will be.

【0030】続いて、図3に示したチルト−インデック
ス装置10の機能を利用してワークWをインデックス回
転させ、図1および図5に示すようにワークWの傾斜面
b1,b2がインデックス回転前の一般面b3と平行と
なるように順次姿勢変更した上で、その傾斜面b1,b
2の穴位置や面位置等を測定することになるのである
が、それに先立って次のような処理を実行する。
Subsequently, the work W is index-rotated by utilizing the function of the tilt-index device 10 shown in FIG. 3, and the inclined surfaces b1 and b2 of the work W are not index-rotated as shown in FIGS. The posture is sequentially changed so as to be parallel to the general surface b3 of the
Although the hole position, the surface position, and the like of No. 2 are to be measured, the following processing is executed prior to that.

【0031】すなわち、上記のようにワークWを所定角
度だけインデックス回転させたならば(ステップS1
1)、機械用測定ブロック5,15のうちワークW側の
傾斜面b1,b2と同じ角度で傾斜している測定面c
1,c2についてX方向での2点の位置を測定する(ス
テップS12)。
That is, if the work W is index-rotated by a predetermined angle as described above (step S1)
1), the measurement surface c that is inclined at the same angle as the inclined surfaces b1 and b2 on the workpiece W side among the measurement blocks 5 and 15 for machines
The positions of two points in the X direction for 1 and c2 are measured (step S12).

【0032】そして、ワークWが規定角度だけインデッ
クス回転した時に上記2点のX方向での座標位置がとも
に等しくなって基準座標値と一致するようにその基準座
標値が予め設定されていることから、上記の測定面c
1,c2についての2点のX方向の測定値と、基準座標
値、ならびに先に求めたX方向での機械自体の伸縮誤差
補正量とで加減算を行うことにより、インデックス回転
誤差補正量を近似的に算出する(ステップS13)。
The reference coordinate values are preset so that when the workpiece W is index-rotated by a specified angle, the coordinate positions of the above-mentioned two points in the X direction both become equal and coincide with the reference coordinate value. , The above measurement surface c
Approximate the index rotation error correction amount by performing addition and subtraction on the two measured values in the X direction for 1 and c2, the reference coordinate value, and the previously calculated expansion / contraction error correction amount of the machine itself in the X direction. Calculated (step S13).

【0033】そののち、ワークWの傾斜面b1,b2の
穴位置や面位置等についての測定を行った上で、それら
の実測値と、先に求めたインデックス回転誤差補正量と
の加減算を行って、実質的にワークWの傾斜面b1,b
2についての実測値をインデックス回転誤差補正量で補
正して最終的な測定値を算出する(ステップS14,S
15)。
After that, the hole position and the surface position of the inclined surfaces b1 and b2 of the work W are measured, and then the actually measured values and the previously calculated index rotation error correction amount are added or subtracted. And substantially the inclined surfaces b1, b of the work W
The actual measured value for 2 is corrected by the index rotation error correction amount to calculate the final measured value (steps S14, S).
15).

【0034】以上のようにしてワークWの穴位置や面位
置等の測定が終了したならば、NC制御装置16ではワ
ークWの各部の加工寸法の適否判定を行った上で(ステ
ップS16)、各測定値とその適否結果結果等を上位の
品質管理装置(例えばパーソナルコンピュータ)に記録
保管して測定作業を終了する(ステップS17)。
When the measurement of the hole position, the surface position, etc. of the work W is completed as described above, the NC control device 16 determines whether or not the machining dimensions of each part of the work W are appropriate (step S16). Each measurement value and the result of suitability thereof are recorded and stored in a higher quality control device (for example, a personal computer), and the measurement work is finished (step S17).

【0035】一方、図2に示した機械加工ラインで加工
すべきワークWの追加や変更に応じて同図のライン編成
を変更する場合、例えば図2の加工ステージS−3,S
−5を図6のように測定ステージM−1,M−2に変更
し、同時に図2の測定ステージM−1,M−2を図6の
ように加工ステージS−33,S−34に変更する場合
には次のように処理する。
On the other hand, when the line organization shown in FIG. 2 is changed according to the addition or change of the work W to be processed on the machining line shown in FIG. 2, for example, the processing stages S-3 and S shown in FIG.
-5 is changed to measuring stages M-1 and M-2 as shown in FIG. 6, and at the same time, measuring stages M-1 and M-2 of FIG. 2 are changed to processing stages S-33 and S-34 as shown in FIG. When changing, process as follows.

【0036】すなわち、図3に示したように、加工ステ
ージであるか測定ステージであるかにかかわらず、いず
れのステージにもタッチプローブ13が装着された測定
用のスピンドルヘッド8が予め装備されているものとす
れば、それまで加工ステージであったステージS−3,
S−5のNC制御装置16に測定用のNCプログラムを
ロードするだけで測定ステージM−1,M−2に直ちに
改造可能であり、同様にそれまで測定ステージであった
ステージM−1,M−2のNC制御装置16に加工用の
NCプログラムをロードするだけで加工ステージS−3
3,S−34に直ちに改造することができる。
That is, as shown in FIG. 3, regardless of whether it is a processing stage or a measurement stage, a spindle head 8 for measurement having a touch probe 13 attached thereto is pre-installed on any stage. If there is a stage S-3, which was a processing stage until then,
It is possible to immediately modify the measurement stages M-1 and M-2 by simply loading the NC program for measurement into the NC controller 16 of S-5, and similarly, the stages M-1 and M that were the measurement stages up to that point. Of the machining stage S-3 by simply loading the NC program for machining into the NC control device 16 of No.-2.
3, S-34 can be immediately modified.

【0037】[0037]

【発明の効果】以上のように本発明によれば、多自由度
のNC工作機械を実質的に測定機として利用しながら
も、パレットに付帯している測定ブロックの測定値をも
とに機械自体およびワークの伸縮誤差補正量を算出した
上で、この補正量に応じてワークの各部の実測値を補正
するようにしているので、恒温室等の設備を必要とする
ことなく測定精度の向上が図れるとともに、測定結果の
信頼性が向上する。
As described above, according to the present invention, an NC machine tool having multiple degrees of freedom is used substantially as a measuring machine, but the machine is based on the measured value of the measuring block attached to the pallet. Since the amount of expansion / contraction error correction of itself and the work is calculated and the measured value of each part of the work is corrected according to this correction amount, the measurement accuracy is improved without the need for equipment such as a temperature-controlled room. And the reliability of the measurement result is improved.

【0038】また、NCプログラムのロードのみで加工
ステージを測定ステージに、また逆に測定ステージを加
工ステージにそれぞれ改造可能であることから、ステー
ジの入れ換えを伴う機械加工ラインの編成替えが余儀な
くされた場合でも、大規模な工事を必要とすることなく
機械加工ラインの編成替えを行うことができるようにな
って、システム全体の柔軟性が高くなる。
Further, since it is possible to modify the machining stage into the measurement stage and vice versa by simply loading the NC program, it is inevitable to reorganize the machining line accompanied by the replacement of the stages. Even in such a case, it becomes possible to reconfigure the machining line without requiring a large-scale construction, and the flexibility of the entire system becomes high.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明で使用されるパレットの説明図で、
(A)はパレットの正面図、(B)は同図(A)の機械
用測定ブロックの拡大斜視図。
FIG. 1 is an explanatory view of a pallet used in the present invention,
(A) is a front view of a pallet, (B) is an enlarged perspective view of the machine measurement block of the same figure (A).

【図2】機械加工ラインの一例を示す概略説明図。FIG. 2 is a schematic explanatory view showing an example of a machining line.

【図3】図2に示す機械加工ラインの各ステージでの構
成を示す説明図。
FIG. 3 is an explanatory diagram showing a configuration of each stage of the machining line shown in FIG.

【図4】本発明の一実施例を示す処理手順のフローチャ
ート。
FIG. 4 is a flowchart of a processing procedure showing an embodiment of the present invention.

【図5】図1のワークの平面説明図。5 is an explanatory plan view of the work of FIG. 1. FIG.

【図6】図2の機械加工ラインでの編成替え後の概略説
明図。
6 is a schematic explanatory view after the knitting is changed in the machining line of FIG.

【符号の説明】[Explanation of symbols]

1…パレット 4,14…機械用測定ブロック 5,15…機械用測定ブロック 6…ワーク用測定ブロック 7…NC工作機械 13…タッチプローブ 16…NC制御装置 M−1,M−2…測定ステージ W…ワーク 1 ... Pallet 4,14 ... Machine measurement block 5,15 ... Machine measurement block 6 ... Work measurement block 7 ... NC machine tool 13 ... Touch probe 16 ... NC control device M-1, M-2 ... Measurement stage W …work

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 パレット搬送方式でワークを搬送しなが
らこのワークに対し各加工ステージのNC工作機械によ
り加工を施す一方、特定の加工ステージでワークの穴位
置および面位置等の測定を行う機械加工ラインのワーク
自動測定方法であって、 前記パレットのそれぞれに、工作機械自体の三次元方向
の伸縮誤差補正量を算出するのに必要な測定面をもつ機
械用測定ブロックと、ワークの伸縮誤差補正量を算出す
るのに必要な測定面をもってワークと同材質のワーク用
測定ブロックとを予め取り付けておき、 前記工作機械の主軸に装着された測定用プローブを測定
用NCプログラムに基づいて動かして、ワークの所定の
穴位置および面位置等とともに前記各測定ブロックの測
定面位置を測定し、 前記各測定ブロックの測定面の実測値と予め設定された
それらの測定面の基準座標値とに基づいて工作機械の各
方向の伸縮誤差補正量とワークの伸縮誤差補正量とを算
出し、 これらの工作機械およびワークの伸縮誤差補正量に応じ
て前記ワークの穴位置および面位置の実測値を補正した
上で測定値として出力することを特徴とする機械加工ラ
インのワーク自動測定方法。
1. A machining process in which a workpiece is conveyed by a pallet conveying method while the workpiece is machined by an NC machine tool of each machining stage, and the hole position and surface position of the workpiece are measured at a specific machining stage. A method for automatically measuring a workpiece on a line, wherein each of the pallets has a measuring block for a machine having a measurement surface necessary for calculating the expansion / contraction error correction amount of the machine tool itself, and the expansion / contraction error correction of the workpiece. A work and a work measuring block of the same material are attached in advance with a measuring surface necessary for calculating the quantity, and the measuring probe mounted on the spindle of the machine tool is moved based on the measuring NC program, The measurement surface position of each measurement block is measured together with the predetermined hole position and surface position of the work, and the measured value of the measurement surface of each measurement block and The expansion / contraction error correction amount in each direction of the machine tool and the expansion / contraction error correction amount of the workpiece are calculated based on the set reference coordinate values of the measurement surface, and the expansion / contraction error correction amount of the machine tool and the workpiece is calculated according to the calculated expansion / contraction error correction amount. A method for automatically measuring a workpiece on a machining line, wherein the measured values of the hole position and the surface position of the workpiece are corrected and output as measured values.
JP05146652A 1993-06-18 1993-06-18 Automatic measurement method for workpieces on machining lines Expired - Fee Related JP3111751B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP05146652A JP3111751B2 (en) 1993-06-18 1993-06-18 Automatic measurement method for workpieces on machining lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP05146652A JP3111751B2 (en) 1993-06-18 1993-06-18 Automatic measurement method for workpieces on machining lines

Publications (2)

Publication Number Publication Date
JPH071292A true JPH071292A (en) 1995-01-06
JP3111751B2 JP3111751B2 (en) 2000-11-27

Family

ID=15412575

Family Applications (1)

Application Number Title Priority Date Filing Date
JP05146652A Expired - Fee Related JP3111751B2 (en) 1993-06-18 1993-06-18 Automatic measurement method for workpieces on machining lines

Country Status (1)

Country Link
JP (1) JP3111751B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103286631A (en) * 2012-02-22 2013-09-11 北京福田康明斯发动机有限公司 Benchmark deviation compensation type processing method and system used for box or shell part

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103286631A (en) * 2012-02-22 2013-09-11 北京福田康明斯发动机有限公司 Benchmark deviation compensation type processing method and system used for box or shell part

Also Published As

Publication number Publication date
JP3111751B2 (en) 2000-11-27

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