JPS60177848A - Correction of original point in nc machine tool - Google Patents
Correction of original point in nc machine toolInfo
- Publication number
- JPS60177848A JPS60177848A JP3478384A JP3478384A JPS60177848A JP S60177848 A JPS60177848 A JP S60177848A JP 3478384 A JP3478384 A JP 3478384A JP 3478384 A JP3478384 A JP 3478384A JP S60177848 A JPS60177848 A JP S60177848A
- Authority
- JP
- Japan
- Prior art keywords
- coordinate system
- contact
- test bar
- correction
- coordinates
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
- B23Q17/2233—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work for adjusting the tool relative to the workpiece
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machine Tool Sensing Apparatuses (AREA)
- Numerical Control (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、数値制御工作機械において、ワークパレッ
ト上に載着される工作物と加工工具をセットする主軸と
の相関位置を決定するための原点補正方法に関するもの
である。[Detailed Description of the Invention] [Field of Industrial Application] This invention is a numerically controlled machine tool for determining the relative position between a workpiece placed on a work pallet and a spindle on which a processing tool is set. The present invention relates to an origin correction method.
ＮＯ工作機械は、それ自体に予め組込まれた数値指令に
もとづいて操作することによシ、所望の加工が自動的に
達成されるものであるが、テーブルに対するパレットの
取付誤差更にはパレット上に載着された被工作物の取付
変位、又機械自体の変形等１て起因する精度不良を招く
ことが多い。したがってその対策として主軸の中心と工
作物との位置関係を予めチェックし、正確な位置決めを
行なうという予備操作を必要としている。NO machine tools automatically achieve the desired machining by operating them based on numerical commands built into them, but errors in mounting the pallet to the table and errors on the pallet may occur. This often results in poor accuracy due to mounting displacement of the mounted workpiece or deformation of the machine itself. Therefore, as a countermeasure to this, a preliminary operation is required in which the positional relationship between the center of the spindle and the workpiece is checked in advance and accurate positioning is performed.
従来、上記位置決めを行なう手段として例えば小円孔を
設けたニジロケータをワークパレットの適所に取υ付け
、その端面及び小円孔に、主軸に嵌装したタッチセンサ
ーを接触させ、主軸とパレットとのずれを補正するとい
う方法、又はパレットに設けた基準孔に対して主軸に取
り付けたタッチセンサーを挿入し、主軸ヘッドもしくは
工作物テーブルをＸ−Ｙ軸方向へ移動させ、上記工具が
基準孔の内面に接触するまでの移動量にもとづき基準孔
の中心と主軸中心間の変位を算出して補正を行なうとい
う方法が採用されていた。しかし両者の方法共に、タッ
チセンサーを使用してパレット端を測定するものである
ため、パレットの回転中心は計算できず、したがって加
工物に正確な補正値を反映できないという欠点があった
。加えて前者の方法ではニジロケータの加工誤差も問題
となっていた。Conventionally, as a means for performing the above positioning, for example, a rainbow locator with a small circular hole is attached to a suitable location on the work pallet, and a touch sensor fitted to the main shaft is brought into contact with the end face and the small circular hole, thereby detecting the connection between the main shaft and the pallet. You can either correct the deviation by inserting a touch sensor attached to the spindle into the reference hole provided on the pallet, move the spindle head or workpiece table in the X-Y axis direction, and then move the tool to the inner surface of the reference hole. A method has been adopted in which the displacement between the center of the reference hole and the center of the main shaft is calculated and corrected based on the amount of movement until contact with the center of the reference hole. However, since both methods measure the edge of the pallet using a touch sensor, the center of rotation of the pallet cannot be calculated, and therefore an accurate correction value cannot be reflected on the workpiece. In addition, the former method also had a problem with machining errors in the rainbow locator.
この発明は、メタルコスタクト検出タイプのワークタッ
チセンサーを使用して、回転テーブルに載着したパレッ
ト上のタッチプローブを主軸に挿嵌し７′Ｃ，テストバ
ーに接触させることにより、Ｘ・２軸の原点を自動的に
補正する方法を提供し、上記従来法の問題を解消するこ
とを目的としてなされたものである。This invention uses a metal cost detection type workpiece touch sensor to insert a touch probe on a pallet mounted on a rotary table into the spindle and bring it into contact with the test bar at 7'C. The purpose of this invention is to provide a method for automatically correcting the origin of an axis, and to solve the problems of the above-mentioned conventional methods.
〔発明の構成〕
この発明は、Ｘ軸ストローク中心の座標をゼロに設定し
、パレットに立設したタッチプローブを主軸とともに回
転するテストバーの径方向からその軸方向の数点て接触
させてこれら接触点の座標の平均値をとシ、次に回転テ
ーブルを１８０度に回動してタッチプローブの位置を変
え、同様にテストバーに対する接触点の座標の平均値を
とり、これら平均値よフＸ軸における補正量と補正方向
を演算し、ワーク座標系全シフトさせ加工用の座標系を
設定し、更に上記タッチプローブを回転中のテストバー
の先端面に接触させ、予め設定しておいた接触点の座標
と比較し、そのずれ量を補正量としてワーク座標系をシ
フトさせ加工用の座標系を設定することを特徴とするも
のである。[Structure of the Invention] The present invention sets the coordinates of the X-axis stroke center to zero, and touches the test bar at several points in the axial direction from the radial direction of the test bar that rotates with the main shaft with a touch probe installed upright on the pallet. Take the average value of the coordinates of the contact point, then rotate the rotary table 180 degrees to change the position of the touch probe, and similarly take the average value of the coordinates of the contact point with respect to the test bar. Calculate the amount of correction and direction of correction on the X axis, shift the entire workpiece coordinate system, set the coordinate system for machining, and then bring the touch probe into contact with the tip of the rotating test bar to perform the preset settings. This method is characterized by comparing the coordinates of the contact point and shifting the workpiece coordinate system using the amount of deviation as a correction amount to set a coordinate system for machining.
以下この発明の実施態様を例示した第１図及び第２図に
もとずいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be explained below based on FIGS. 1 and 2, which illustrate examples.
すなわち、（１）はベッドであり、その上にはコラム（
２）及びワークテーブル（３）が載設され、しかもコラ
ム（２）はベッド（１）上を２軸方向に進退移動させる
ことが可能であり、又ワークテーブル（３）は上記コラ
ム（２）の移動方向に対して直交する左右方向（Ｘ軸方
向）の移動が可能である。なお上記コラム（２）には交
換工具を保持する主軸（４）が突設されておシ、コラム
内にはこの主軸を回転させるための機構及び主軸を上下
方向つまｐｘＸ軸方向移動させる機構が組込まれている
。父上記ワークテーブル（３）上には回転テーブル（５
）が載設されて８す、加工される工作物はパレツ） （
６）ｆ、介して上記回転テーブル（６）上に載着保持さ
れるのである。なお図示されていないが、本発明方法に
よ請求めた補正量及び補正方向の信号値を演算処理しそ
の指令を発信して機械装置を自動操作させるための制御
回路及び駆動ユニット等からなる４気的諸装置が付着さ
れている。In other words, (1) is a bed, and above it is a column (
2) and a work table (3) are placed thereon, and the column (2) can be moved forward and backward in two axes on the bed (1), and the work table (3) is mounted on the column (2). It is possible to move in the left and right direction (X-axis direction) perpendicular to the direction of movement. The column (2) has a main shaft (4) protruding from the column (2) that holds the replacement tool, and inside the column there is a mechanism for rotating the main shaft and a mechanism for moving the main shaft in the vertical direction of the pxX axis. Built-in. There is a rotary table (5) on the work table (3) above.
) is placed on the 8th floor, and the workpiece to be machined is a pallet) (
6) It is mounted and held on the rotary table (6) via f. Although not shown in the drawings, there is a control circuit and a drive unit, etc., for calculating the correction amount and correction direction signal values requested by the method of the present invention and transmitting the commands to automatically operate the mechanical device. Pneumatic devices are attached.
ところでこの発明においては、補正量及び補正方向の検
出器として主軸（４）の基端側にレリえばメタルコンタ
クトタイプのワークタッチセンサー（９）ト、上記主軸
（４）に挿嵌される予め所定径、所定長さに精密加工さ
れたテストバー（７）と、パレット（６）の側縁等に立
設保持されるタッチプローブ（８）が用いられる、
つｔ４）、テストバ〜（７）を主軸（４）に挿嵌すると
共にタッチプローブ（８）を選択された適正な位にｑｖ
ｃ立設し、これらを使用してＸ軸及２軸の原点を自動的
に補正しようとするものである。すなわち、上記ワーク
タッチセンサー（９）は電流検出用の抵抗ヲ介して交流
電源に接続され、交流電流で励磁されるようになってお
シ、これによって主軸（４）の囲シに環状の磁束が発生
する。このため主軸（４）に装着されたテストバー（γ
）がタッチプローブ（８）に接触すると、第１図に破線
で示すように、タッチプローブ（８）→パレット（６）
→回転テーブル（５）→ワークテーブル（３）→ベッド
→（１）コラム（２）→主軸（４）によって形成される
電流路（至）に誘道電流が流れ、ワークタッチセンサー
（９）を流れる励磁電流が増加してタッチプローブ（８
）とテストバー（７）との妾触が検出できるのであり、
そして、これによってＸ軸、ｚ軸の原点を自動的に補正
しようとするものである。By the way, in this invention, a metal contact type workpiece touch sensor (9) is placed on the proximal end side of the main shaft (4) as a detector for the correction amount and correction direction, and a predetermined sensor is inserted into the main shaft (4). A test bar (7) precision-machined to a predetermined diameter and length, and a touch probe (8) that is erected and held on the side edge of a pallet (6) are used. Insert the touch probe (8) into the main shaft (4) and move it to the selected appropriate position qv
c) and use these to automatically correct the origins of the X-axis and the two axes. That is, the workpiece touch sensor (9) is connected to an AC power source via a current detection resistor and is excited by the AC current, thereby creating an annular magnetic flux around the main shaft (4). occurs. For this reason, the test bar (γ
) comes into contact with the touch probe (8), the touch probe (8) → pallet (6) as shown by the broken line in Figure 1.
→ Rotary table (5) → Work table (3) → Bed → (1) Column (2) → An induced current flows through the current path (to) formed by the main shaft (4), and the work touch sensor (9) The excitation current flowing increases and the touch probe (8
) and the test bar (7) can be detected,
With this, the origin of the X-axis and the Z-axis is automatically corrected.
すなわち、Ｘ軸の補正を行なうに除してはまず−ＸＸ軸
トローク中心の座標をゼロに設定し、タッチグローブ（
８ンヲ回転中のテストバー（７）の側方からその径方向
に２軸方向の異なる位置に数回接触させてこれら接触点
の座標の平均値をとる。次に１転テーブル（５）を１８
０度回動させてテストバー〔７〕の反対側の側方から上
記と同様にタッチプローブ（８〕を２軸方向の複数個所
に接触させてこれら接触点の座標の平均値をとる。この
ようにして得らルた２つの平均値を基にしてＸ軸にかけ
る補り量、補正方向を演算処理し、Ｘ軸の補正量をワー
ク座標系にフィードバックする。In other words, to perform X-axis correction, first set the coordinates of the -XX-axis stroke center to zero, and then use the touch glove (
The test bar (7) is rotated several times from the side at different positions in two axial directions in the radial direction, and the average value of the coordinates of these contact points is taken. Next, turn the 1-turn table (5) to 18
After rotating the test bar [7] by 0 degrees, touch the touch probe (8) at multiple points along the two axes in the same manner as above from the opposite side of the test bar [7], and take the average value of the coordinates of these contact points. Based on the two average values obtained in this way, the amount of compensation applied to the X-axis and the direction of correction are calculated, and the amount of correction of the X-axis is fed back to the workpiece coordinate system.
次に２軸の補正を行なうに際しては、タッチプローブ（
８）を回転中のテストバー（７）の先端面に接触させ、
予め設定しておいた接触点の座標と比較演算し、そのず
れ量を補正量としてこれをワーク座標系にフィードバッ
クするのである。Next, when performing two-axis correction, use the touch probe (
8) in contact with the tip surface of the rotating test bar (7),
A comparison calculation is made with the coordinates of the contact point set in advance, and the amount of deviation is fed back to the workpiece coordinate system as a correction amount.
以上のようにこの発明によれば、主軸とともに回転する
テストバーの両側方からその軸心方向（２軸方向）の諷
数点と更にテストバーの先端面にタッチプローブを接触
させて検測を行なう方法であるため、パレットの回転中
心が計算でき、回転中心の値を加工物に正確に反映でき
る。しかも回転主軸とテストバーの軸心にずれがあって
も、その偏位量に関係なく確実に原点の自動補正が達成
されるものである。As described above, according to the present invention, a touch probe is contacted from both sides of the test bar that rotates with the main shaft in the axial direction (biaxial direction) and also on the tip surface of the test bar. Because this method allows the center of rotation of the pallet to be calculated, the value of the center of rotation can be accurately reflected on the workpiece. Furthermore, even if there is a misalignment between the axes of the main axis of rotation and the test bar, automatic correction of the origin can be reliably achieved regardless of the amount of deviation.
図面はこの発明の実施の態様全６１示するものであシ、
第１図はその側面図、第２図は平面図である。
（４）は主軸、（５）は回転テーブル、（６）はパレッ
ト、（７）はテストバー、（８）はタッチプローブ、（
９）はワー、クタッチセンサー。
特許出願人 株式会社森精機製作所The drawings show all 61 embodiments of this invention.
FIG. 1 is a side view thereof, and FIG. 2 is a plan view thereof. (4) is the spindle, (5) is the rotary table, (6) is the pallet, (7) is the test bar, (8) is the touch probe, (
9) is a touch sensor. Patent applicant: Mori Seiki Co., Ltd.
Claims (1)
レットに立設したタッチプローブを主軸とともに回転す
るテストバーの左右両側において径方向からその軸方向
の数点で接触させ、両側の各接触点の座標の平均値をと
ってこれらの平均値よｐｘ軸における補正量と補正方向
を演算してワーク座標系をシフトさせ加工用の座標系を
設定し、更にタッチプローブを上記テストバーの先端面
に接触させ、予め設定１−でおいた接触点の座標と比較
し、そのずれ量を補正量としてワーク座標系をシフトさ
せ加工用の座標系を設定することを特徴とする数値制御
工作機における原点補正方法。(1) Set the coordinates of the X-axis stroke center to zero, touch the touch probes installed on the pallet at several points in the axial direction from the radial direction on both the left and right sides of the test bar that rotates with the main shaft, and Take the average value of the coordinates of the contact point, calculate the correction amount and correction direction on the px axis based on these average values, shift the workpiece coordinate system, set the coordinate system for machining, and then move the touch probe to the above test bar. Numerical control work that is characterized by making contact with the tip surface, comparing it with the coordinates of the contact point set in advance in setting 1-, shifting the workpiece coordinate system using the amount of deviation as a correction amount, and setting the coordinate system for machining. How to correct the origin in the machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3478384A JPS60177848A (en) | 1984-02-23 | 1984-02-23 | Correction of original point in nc machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3478384A JPS60177848A (en) | 1984-02-23 | 1984-02-23 | Correction of original point in nc machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60177848A true JPS60177848A (en) | 1985-09-11 |
Family
ID=12423874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3478384A Pending JPS60177848A (en) | 1984-02-23 | 1984-02-23 | Correction of original point in nc machine tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60177848A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0436603U (en) * | 1990-07-19 | 1992-03-27 | ||
| JPH05250019A (en) * | 1991-12-02 | 1993-09-28 | General Electric Co <Ge> | Matching device for computer numerical control machine and method for matching computer numerical control machine |
| EP1162030A2 (en) * | 2000-06-07 | 2001-12-12 | Mori Seiki Co., Ltd. | NC machine tool having spindle run-out diagnosing function |
| CN107322018A (en) * | 2017-08-18 | 2017-11-07 | 安徽江淮汽车集团股份有限公司 | The adjustment system and its method of adjustment of kingpin hole position |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57121447A (en) * | 1981-01-08 | 1982-07-28 | Hitachi Seiki Co Ltd | Zero point adjusting apparatus for a machine tool |
-
1984
- 1984-02-23 JP JP3478384A patent/JPS60177848A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57121447A (en) * | 1981-01-08 | 1982-07-28 | Hitachi Seiki Co Ltd | Zero point adjusting apparatus for a machine tool |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0436603U (en) * | 1990-07-19 | 1992-03-27 | ||
| JPH05250019A (en) * | 1991-12-02 | 1993-09-28 | General Electric Co <Ge> | Matching device for computer numerical control machine and method for matching computer numerical control machine |
| EP1162030A2 (en) * | 2000-06-07 | 2001-12-12 | Mori Seiki Co., Ltd. | NC machine tool having spindle run-out diagnosing function |
| EP1162030A3 (en) * | 2000-06-07 | 2004-06-23 | Mori Seiki Co., Ltd. | NC machine tool having spindle run-out diagnosing function |
| CN107322018A (en) * | 2017-08-18 | 2017-11-07 | 安徽江淮汽车集团股份有限公司 | The adjustment system and its method of adjustment of kingpin hole position |
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