JPH01295743A - Main spindle thermal displacement correcting device for machine tool - Google Patents

Main spindle thermal displacement correcting device for machine tool

Info

Publication number
JPH01295743A
JPH01295743A JP12356888A JP12356888A JPH01295743A JP H01295743 A JPH01295743 A JP H01295743A JP 12356888 A JP12356888 A JP 12356888A JP 12356888 A JP12356888 A JP 12356888A JP H01295743 A JPH01295743 A JP H01295743A
Authority
JP
Japan
Prior art keywords
spindle
head
displacement
spindle head
fixed
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
Application number
JP12356888A
Other languages
Japanese (ja)
Inventor
Takahito Yoshimi
吉見 隆仁
Akihiro Matsuura
松浦 明広
Toshiji Takashima
利治 高島
Hiroyuki Nakano
浩之 中野
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.)
Toyoda Koki KK
Original Assignee
Toyoda Koki KK
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 Toyoda Koki KK filed Critical Toyoda Koki KK
Priority to JP12356888A priority Critical patent/JPH01295743A/en
Priority to US07/352,470 priority patent/US4919575A/en
Priority to EP19890108974 priority patent/EP0343517A3/en
Publication of JPH01295743A publication Critical patent/JPH01295743A/en
Pending legal-status Critical Current

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  • Automatic Control Of Machine Tools (AREA)

Abstract

PURPOSE:To enhance machining accuracy of a workpiece by fixing a measuring head and a contactless displacement meter respectively to a mounting rod and a mounting bracket, consisting of low thermal expansion material, and correcting a feed amount of a spindle head by the displacement amount in the point end part of a main spindle. CONSTITUTION:A measuring head 19 of a feedback scale 17 is mounted to a mounting rod 18 of low thermal expansion material parallel with the scale 17. While a mounting bracket 24 of a contactless displacement meter 23 is also constituted of low thermal expansion material. Accordingly, a measurement error by heat of the measuring head 19 and the displacement meter 23 decreases, and accurately measuring the thermal deformation of a spindle head 1 and a main spindle 6, machining accuracy is more improved by enabling the displacement in the point end of the main spindle by a sum of the thermal deformation to be accurately corrected.

Description

【発明の詳細な説明】[Detailed description of the invention] 【産業上の利用分野】[Industrial application field]

この発明は、主軸および主軸ヘッドの熱変位を補正した
送り景で主軸を送るようにした工作機械の主軸熱変位補
正装置に関するものである。
The present invention relates to a spindle thermal displacement correction device for a machine tool, which feeds the spindle with a feed pattern that corrects thermal displacement of the spindle and spindle head.

【従来の技術】[Conventional technology]

従来、工作機械の主軸熱変位補正装置として、実公昭6
2−40751号公報に示すものがあった。この主軸熱
変位補正装置は、L字形の取付板の一辺部を主軸ヘッド
の先端面に固定し、主軸ヘッド末端側に延びる前記取付
板の他辺部にスケールを固定し、このスケールと近接し
て対向する測定ヘッドを主軸ヘッドを@線往復動可能に
支持したサドルのようなフレームに固定し、前記測定ヘ
ッドに接続した制御回路に主軸・\ラド送りモーフの駆
動回路を接続したものである。 以上のように構成された工作機械の主軸熱変位補正装置
は、工作機械の運転中に、主軸を主軸ヘッドに支持する
ベアリングの主軸の回転に伴う発熱や、主軸を回転させ
る主軸駆動モーフの発熱によって主軸ヘッドおよび主軸
が熱変位するのを、主軸ヘッド先端の熱変位を前記スケ
ールと測定ヘッドとによって検出し、測定ヘッドからの
検出信号によって制御回路から駆動回路に補正指令を与
え、この指令によって前記送りモータによる主軸ヘッド
のフレームに対する熱変位を補正した送り量で主軸の送
りを行い、主軸に装着した工具による被加工物の加工精
度を高めそいる。
Conventionally, as a spindle thermal displacement correction device for machine tools,
There was one shown in Publication No. 2-40751. In this spindle thermal displacement correction device, one side of an L-shaped mounting plate is fixed to the tip end surface of the spindle head, a scale is fixed to the other side of the mounting plate extending toward the end of the spindle head, and a scale is fixed to the other side of the mounting plate that extends toward the end of the spindle head. The measuring head facing the measuring head is fixed to a saddle-like frame that supports the spindle head so that it can reciprocate in the @ line, and the drive circuit for the spindle/rad feed morph is connected to the control circuit connected to the measuring head. . The spindle thermal displacement correction device for a machine tool configured as described above is designed to compensate for the heat generated by the rotation of the spindle of the bearing that supports the spindle in the spindle head and the heat generated by the spindle drive morph that rotates the spindle while the machine tool is operating. The thermal displacement of the spindle head and spindle is detected by the scale and the measuring head, and the control circuit gives a correction command to the drive circuit based on the detection signal from the measuring head. The spindle is fed at a feed rate that corrects the thermal displacement of the spindle head relative to the frame caused by the feed motor, thereby increasing the machining accuracy of the workpiece by the tool attached to the spindle.

【発明が解決しようとする課n】[Problem n that the invention attempts to solve]

一般に工作機械では、主軸ヘッドは主軸ヘッド送りモー
タから主軸ヘッドに駆動力が伝達されるボールナツト取
付面を基準としてフレームに対し熱変位する。また、主
軸はこれを主軸ヘッドに支持するベアリングの端面基準
として主軸ヘッドに対し熱変位する。したがって、主軸
の先端はフレームに対し前記2つの熱変位の合計分だけ
変位するが、前述した従来の主軸熱変位補正装置では主
軸ヘッドの熱変位しか補正できず、このため、被加工物
の加工精度の向上が不十分であるという問題点があった
。 この発明は、前述した問題点を解決しようとするもので
あって、主軸ヘッドの先端部の熱変位のみではなく、こ
の熱変位と主軸の熱変位との合計分の主軸先端の変位を
主軸ヘッドの送り量で補正することにより、被加工物の
加工精度をさらに高めることができる工作機械の主軸熱
変位補正装置を比較的簡単な構成で提供することを目的
とするものである。
In general, in machine tools, the spindle head is thermally displaced relative to the frame with reference to the ball nut mounting surface through which driving force is transmitted from the spindle head feed motor to the spindle head. Further, the spindle is thermally displaced with respect to the spindle head using the end face reference of a bearing that supports the spindle head on the spindle head. Therefore, the tip of the spindle is displaced relative to the frame by the sum of the two thermal displacements, but the conventional spindle thermal displacement correction device described above can only correct the thermal displacement of the spindle head, and therefore, it is difficult to process the workpiece. There was a problem that the improvement in accuracy was insufficient. This invention is an attempt to solve the above-mentioned problem, and the invention aims to calculate not only the thermal displacement of the tip of the spindle head but also the total displacement of the spindle tip of this thermal displacement and the thermal displacement of the spindle. It is an object of the present invention to provide a main spindle thermal displacement correction device for a machine tool with a relatively simple configuration, which can further improve the machining accuracy of a workpiece by correcting the feed amount.

【課題を解決するための手段】[Means to solve the problem]

この発明による工作機械の主軸熱変位補正装置は、主軸
ヘッドを往復動可能に支持するコラムのようなフレーム
に固定したフィードバックフレームと、このスケールの
測定ヘッドに一端部が固定され前記主軸ヘッドの先端部
に他端部が固定された測定ヘッド取付ロッドと、主軸の
先端部の熱変位を検出する非接触変位計と、この変位計
を主軸ヘッドの先端部に前記取付ロッドと同一平面上で
固定する変位計取付ブラケットと、前記測定ヘッドおよ
び変位計の検出信号に7よって主軸・・、ラドと主軸と
の熱変位の合計による主軸先端部の変位分だけ主軸・\
ラドの送り量を補正する送り量補正手段とを備え、前記
取付ロッドおよび前記取付ブラケットを低熱膨張材料で
構成したものである。
The main spindle thermal displacement correction device for a machine tool according to the present invention includes a feedback frame fixed to a column-like frame that supports the main spindle head in a reciprocating manner, and one end of which is fixed to the measuring head of the scale, and the tip of the main spindle head. A measuring head mounting rod whose other end is fixed to the main shaft head, a non-contact displacement meter that detects thermal displacement at the tip of the spindle, and this displacement meter is fixed to the tip of the spindle head on the same plane as the mounting rod. Based on the detection signals from the displacement meter mounting bracket, the measuring head, and the displacement meter, the main shaft... is adjusted by the amount of displacement of the tip of the spindle due to the total thermal displacement between the Rad and the main shaft.
The mounting rod and the mounting bracket are made of a low thermal expansion material.

【作  用】[For production]

この発明の主軸熱変位補正装置は、従来のこの種補正装
置が有している部品に加えて、主軸の先端の変位を検出
する非接触変位計を低熱膨張材料からなる取付ブラケッ
トによって主軸ヘッドに固定するとともに、送り量補正
手段に測定ヘッドおよび前記変位計からの変位信号を加
算する加算回路を設けるという比較vJ簡単な構成であ
りながら、測定ヘッドによって検出した熱変位量および
前記変位計によって検出した熱変位量を加算し、これら
の熱変位量に見合う変位量だけ主軸ヘッドの送り量を補
正することにより、主軸ヘッドおよび主軸の熱変位の合
計による主軸先端の変位を正確に補正でき、前述した従
来のものに比べ、被加工物に対しより高い精度の加工を
行うことができる。
In addition to the parts that conventional correction devices of this type have, the spindle thermal displacement correction device of the present invention includes a non-contact displacement meter that detects the displacement of the tip of the spindle, which is attached to the spindle head using a mounting bracket made of a low thermal expansion material. Although the structure is simple, it has a simple configuration in which the feed rate correction means is provided with an adding circuit that adds the displacement signals from the measuring head and the displacement meter, but the thermal displacement amount detected by the measuring head and the displacement signal detected by the displacement meter are fixed. By adding up the thermal displacement amounts and correcting the feed amount of the spindle head by the amount of displacement commensurate with these thermal displacement amounts, it is possible to accurately correct the displacement of the spindle tip due to the sum of the thermal displacements of the spindle head and spindle. Compared to conventional methods, the workpiece can be processed with higher precision.

【実施例】【Example】

以下、この発明の一実施例につき図を参照して説明する
。 第1図において、1はたて形工作機械の主軸ヘッドであ
り、主軸ヘッド1はフレームであるコラム2に上下方向
に直線往復動可能に支持され、コラム2に設けたモータ
取付台3に主軸ヘッド送りサーボモータ4が固定されて
いる。主軸ヘッド1内に、上、下ベアリング5a、5b
によって、主軸6が回動を可能に軸方向移動を拘束して
支持されている。前記サーボモータ4の出力軸にボール
ねじ軸7が連結され、このねじ軸7は主軸ヘッド1に設
けたボールナツト8および係合部9にボールを介して係
合されている。主軸6の上端部には被動側プーリ10が
固定され、主軸・\ラド1に固定された主軸駆動モータ
(図示省略)から正逆回転力が駆動側プーリ(図示省略
)および無端ベルト11を介して波動側プーリ10に伝
達されるように構成されている。また、主軸6は筒状に
形成され、先端部内に工具12のプルスタッド12aを
有する柄部12bが着脱可能に嵌合固定され、工具12
は主軸6の先端面から下方に突出している。主軸6内の
工具12上方部分には多数の皿ばね13と、これらのば
ね13によって上方に付勢された工具押出ロッド14と
が設けられ、このロッド14の上方には工具アンクラン
プ用シリンダ15が主軸ヘッド1内に固定されている。 前記コラム2に固定した裏板16には主軸ヘッド1の一
側に近接して垂直にフィードバックスケール17が固定
され、このスケール17と平行に測定ヘッド取付ロッド
18が配置されている。この取付ロッド18の上端部に
測定ヘッド19が取付板20によって固定され、測定ヘ
ッド19は前記スケール17と対向しこれと近接して配
置されている。前記取付ロッド18の下端部が固定ブラ
ケット21に固定され、このブラケット21は主軸ヘッ
ド1の先端部−篩下面に固定されている。 主軸6の先端部外周面に検出リング22が設けられ、検
出リング22の裏面上に近接して非接触変位計23が主
軸ヘッド1の一側部先端下方に配置されている。前記変
位計23は、L字状の変位計取付ブラケット24の水平
辺内端部に固定され、このブラケット24の垂直辺上端
部が前記固定ブラケット21の主軸ヘッド1内に延びる
突出部21aの内端部に、取付ロッド18と同一水平面
上で固定されている。前記取付ロッド18.取付板20
、固定ブラケット21および取付ブラケット24はそれ
ぞれ低熱膨張材料で構成されている。 また、取付ブラケット24を包囲して検出リング22の
ガ周側と主軸ヘッド1の先端面との間にカバー25が配
置され、カバー25は主軸ヘッド1に固定されている。 前記測定ヘッド19および変位計23が送り量補正手段
26の加算回路27に接続されている。 送り量補正手段26は、測定ヘッド19と変位計23か
ら入力された検出信号を加算しNG装置の比較手段28
に絶対位置信号として入力され、比較手段28で目標位
置記憶手段29に記憶された絶対位置と比較し、駆動回
路30に主軸ヘッド1の送り凰補正指令を入力させ、こ
の入力に基いて駆動回路25が前記主軸・\ラド送すサ
ーボモータ4を作動させ、主軸ヘッド1および主軸6の
熱変位量の合計分を補正する送り量でコラム2に対し主
軸・\ツ1!1を送るよう(ζ構成さねている。 以上のよう(ご構成された実施例の主軸熱変位補正装置
は、工作機械の運転時に、主軸6の回転によるベアリン
グ5a、5bの発熱や主軸駆動モータの発熱で、主軸ヘ
ッド1および主軸6が上下方向に伸び、これらの先端部
が変位する。そして、ボールねじ軸7のボールナラI・
8取付面から測定−\ラド取付ロッド18の固定ブラケ
ット21を介しての主軸ヘッド1への取付面までの間の
主軸ヘッド1のfi変位は、フィードバックスケ−7し
17の測定ヘッド19が低熱膨張材料で製作された前記
取付ロッド18に取り付けられているので、測定ヘッド
19が前記熱変位に追従して移動し、この変位量の検出
信号が加算回′I#t27に送られる。 また測定ヘッド取付ロッド18の主軸へラド1への取付
面から1軸6の先端部までの熱変位は、非接触変位計2
3の取付ブラケソI・24が前記取付ロッド18の取付
面と同一水平面上で固定ブラケット21を介して主軸ヘ
ッド1に取り付けられており、前記取付ブラケット24
が低熱膨張材料で製作されているので、前記変位計23
で検出することができ、検出した変位量の信号が加算回
路27に送られる。この加算回路27で前記2つの変位
量を加算して絶対位置信号とし、比較手段28で目標位
置記憶手段29に記憶した絶対位置と比較し、駆動回路
30によってサーボモータ4による主軸ヘッド1の送り
量を、〕、〕C−ドパツク制して主軸ヘッド1および主
軸6の熱変位の合計分だけ補正するものである。他の送
り量補正手段26として、第2図に示すように非接触変
位計23と検出リング22間の実際のギャップ量を、ギ
ヤツブ社記憶回路40に記憶された理論ギャップ量とで
比較器41で比較し、この比較器41からの信号に基づ
いて目標位置記憶手段42に記憶された目標位置を目標
位置更新手段43で更新する。 測定・\ノド19からの実際の位置と、更新された目標
位置を比較手段44で比較する。 なお、前記実施例では、固定ブラケット21を介して測
定ヘッド取付ロッド18と非接触変位計取付ブラケット
24とを主軸ヘッド1の先端部に同−平面上で固定した
が、この発明は、固定ブラケットを廃して、前記取付ロ
ッドと取付ブラケットとを同一平面上で主軸ヘッドに直
接固定しても取付スペースがあれば差支えない。さらに
、この発明は、コラム以外のフレームに主軸ヘッドを支
持する工作機械にも適用できる。
Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In Fig. 1, 1 is a spindle head of a vertical machine tool, and the spindle head 1 is supported by a column 2, which is a frame, so as to be able to reciprocate in a straight line in the vertical direction. A head feed servo motor 4 is fixed. Inside the spindle head 1 are upper and lower bearings 5a and 5b.
The main shaft 6 is supported so as to be rotatable but restrained from moving in the axial direction. A ball screw shaft 7 is connected to the output shaft of the servo motor 4, and the screw shaft 7 is engaged with a ball nut 8 and an engaging portion 9 provided on the spindle head 1 via balls. A driven pulley 10 is fixed to the upper end of the main shaft 6, and forward and reverse rotational force is transmitted from a main shaft drive motor (not shown) fixed to the main shaft/rad 1 via a driving pulley (not shown) and an endless belt 11. It is configured such that the signal is transmitted to the wave-side pulley 10. Further, the main shaft 6 is formed into a cylindrical shape, and a handle portion 12b having a pull stud 12a of the tool 12 is removably fitted and fixed in the tip portion thereof.
protrudes downward from the tip surface of the main shaft 6. A large number of disc springs 13 and a tool ejecting rod 14 biased upward by these springs 13 are provided in the upper part of the tool 12 in the main shaft 6, and a tool unclamping cylinder 15 is provided above the rod 14. is fixed within the spindle head 1. A feedback scale 17 is vertically fixed to a back plate 16 fixed to the column 2 in close proximity to one side of the spindle head 1, and a measuring head mounting rod 18 is arranged parallel to the scale 17. A measuring head 19 is fixed to the upper end of the mounting rod 18 by a mounting plate 20, and the measuring head 19 is disposed opposite to and close to the scale 17. The lower end of the mounting rod 18 is fixed to a fixing bracket 21, and this bracket 21 is fixed to the tip of the spindle head 1 and the lower surface of the sieve. A detection ring 22 is provided on the outer circumferential surface of the tip of the spindle 6, and a non-contact displacement meter 23 is disposed below the tip of one side of the spindle head 1 adjacent to the back surface of the detection ring 22. The displacement meter 23 is fixed to the inner end of the horizontal side of an L-shaped displacement meter mounting bracket 24, and the upper end of the vertical side of the bracket 24 is located inside the protrusion 21a of the fixed bracket 21 extending into the spindle head 1. It is fixed at the end on the same horizontal plane as the mounting rod 18. Said mounting rod 18. Mounting plate 20
, the fixing bracket 21 and the mounting bracket 24 are each made of a low thermal expansion material. Further, a cover 25 is disposed surrounding the mounting bracket 24 between the peripheral side of the detection ring 22 and the front end surface of the spindle head 1, and the cover 25 is fixed to the spindle head 1. The measuring head 19 and the displacement meter 23 are connected to an addition circuit 27 of the feed amount correction means 26. The feed amount correction means 26 adds the detection signals input from the measurement head 19 and the displacement meter 23, and compares the result with the comparison means 28 of the NG device.
The comparison means 28 compares the absolute position with the absolute position stored in the target position storage means 29, inputs a feed correction command for the spindle head 1 to the drive circuit 30, and based on this input, the drive circuit ( As described above, the spindle thermal displacement correction device according to the configured embodiment is configured to reduce heat generation due to the heat generated by the bearings 5a and 5b due to the rotation of the spindle 6 and the heat generated by the spindle drive motor during operation of the machine tool. The spindle head 1 and the spindle 6 extend in the vertical direction, and their tips are displaced.Then, the ball neck I of the ball screw shaft 7
8. Measurement from the mounting surface - The fi displacement of the spindle head 1 from the mounting surface of the RAD mounting rod 18 to the spindle head 1 via the fixing bracket 21 is determined by the feedback scale 7. Since it is attached to the mounting rod 18 made of an expansion material, the measuring head 19 moves following the thermal displacement, and a detection signal of this displacement amount is sent to the addition circuit 'I#t27. In addition, the thermal displacement from the mounting surface of the measuring head mounting rod 18 to the main shaft to the rad 1 to the tip of the 1st shaft 6 is determined by the non-contact displacement meter 2.
A mounting bracket I/24 of No. 3 is attached to the spindle head 1 via a fixing bracket 21 on the same horizontal plane as the mounting surface of the mounting rod 18.
Since the displacement gauge 23 is made of a low thermal expansion material, the displacement gauge 23
The detected displacement amount signal is sent to the adding circuit 27. The adding circuit 27 adds the above two displacement amounts to obtain an absolute position signal, which is compared with the absolute position stored in the target position storage means 29 by the comparing means 28, and the drive circuit 30 causes the servo motor 4 to move the spindle head 1. The amount is corrected by the sum of the thermal displacements of the spindle head 1 and the spindle 6 by controlling the C-docks. As another feed amount correction means 26, as shown in FIG. Based on the signal from the comparator 41, the target position stored in the target position storage means 42 is updated by the target position updating means 43. The comparison means 44 compares the actual position from the measured throat 19 and the updated target position. In the above embodiment, the measurement head mounting rod 18 and the non-contact displacement meter mounting bracket 24 were fixed to the tip of the spindle head 1 on the same plane via the fixing bracket 21. Even if the mounting rod and the mounting bracket are fixed directly to the spindle head on the same plane, there is no problem if the mounting space is available. Furthermore, the present invention can also be applied to machine tools in which the spindle head is supported on a frame other than a column.

【発明の効果】【Effect of the invention】

以上説明したように、この発明は、コラムのような主軸
ヘッドを支持するフレームにフィードバックスケールを
固定し、このスケールの測定ヘッドを測定ヘッド取付ロ
ッドによって前記主軸ヘッドに固定し、主軸の先端部の
熱変位を検出する非接触変位針を変位計取付ブラケット
によって主軸ヘッドに前記取付ロッドと同一平面上で固
定し、前記取付ロッドおよび取付ブラケットを低熱膨張
材料で構成するとともに、前記測定ヘッドおよび熱変位
計からの検出信号によって、主軸ヘッドと主軸との熱変
位の合計による主軸先端部の変位分だけ主軸ヘッド送り
モータによる主軸ヘッドの送り量を補正するようにした
ので、部品数の増加が少ない比較的簡単な構成で、主軸
ヘッドおよび主軸の熱変形の合計による主軸先端の変位
を補正することができ、被加工物の加工精度をより高く
することができる工作機械の主軸熱変位補正装置を提供
できるという効果がある。
As explained above, the present invention fixes a feedback scale to a frame supporting a spindle head such as a column, fixes the measuring head of this scale to the spindle head with a measuring head mounting rod, and fixes the measuring head of the scale to the spindle head using a measuring head mounting rod. A non-contact displacement needle for detecting thermal displacement is fixed to the spindle head using a displacement meter mounting bracket on the same plane as the mounting rod, and the mounting rod and the mounting bracket are made of a low thermal expansion material, and the measuring head and the thermal displacement Based on the detection signal from the sensor, the feed amount of the spindle head by the spindle head feed motor is corrected by the displacement of the tip of the spindle due to the total thermal displacement between the spindle head and the spindle, which reduces the increase in the number of parts. Provides a machine tool spindle thermal displacement correction device that has a simple configuration and can correct the displacement of the spindle tip due to the sum of thermal deformation of the spindle head and spindle, thereby increasing the machining accuracy of the workpiece. There is an effect that it can be done.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の一実施例による工作i械の主軸熱変
位補正装置を示す縦断説明図、第2図は他の送り量補正
手段を示すブロック図である。 1  主軸ヘッド、2・コラム(フレーム)、4主軸ヘ
ッド送りサーボモーフ、6・・主軸、17・・フィード
バックスケール、18・測定ヘッド取付ロッド、19 
測定ヘッド、21・・固定ブラケット、22・検出リン
グ、23・・・非接触変位計、24・・変位計取付ブラ
ケット、26・送り旦補正手段、27 加算回路。
FIG. 1 is a longitudinal sectional view showing a main shaft thermal displacement correction device for a machine tool according to an embodiment of the present invention, and FIG. 2 is a block diagram showing another feed amount correction means. 1. Main shaft head, 2. Column (frame), 4. Main shaft head feed servo morph, 6. Main shaft, 17. Feedback scale, 18. Measuring head mounting rod, 19.
Measuring head, 21.Fixing bracket, 22.Detection ring, 23.Non-contact displacement meter, 24.Displacement meter mounting bracket, 26.Feed date correction means, 27. Addition circuit.

Claims (1)

【特許請求の範囲】[Claims] 工作機械の主軸ヘッドを往復動可能に支持するフレーム
に主軸ヘッドの往復動方向と平行に固定したフィードバ
ックスケールと、このスケールの測定ヘッドに一端部が
固定され主軸ヘッドの先端部に他端部が固定された低熱
膨張材料からなる測定ヘッド取付ロッドと、主軸ヘッド
に回転可能に支持された主軸の先端部の熱変位を検出す
る非接触変位計と、この変位計を主軸ヘッドの先端部に
前記取付ロッドと同一平面上で固定する低熱膨張材料か
らなる変位計取付ブラケットと、前記測定ヘッドおよび
変位計からの検出信号によって主軸ヘッドと主軸の熱変
位の合計による主軸先端部の変位分だけ主軸ヘッドの送
り量を補正する送り量補正手段とを備えたことを特徴と
する工作機械の主軸熱変位補正装置。
A feedback scale is fixed to a frame that supports the spindle head of a machine tool in a reciprocating manner parallel to the reciprocating direction of the spindle head, and one end is fixed to the measuring head of this scale and the other end is attached to the tip of the spindle head. A measurement head mounting rod made of a fixed low thermal expansion material, a non-contact displacement meter that detects thermal displacement at the tip of the spindle that is rotatably supported by the spindle head, and a non-contact displacement meter that detects thermal displacement at the tip of the spindle head that is rotatably supported by the spindle head. A displacement meter mounting bracket made of a low thermal expansion material that is fixed on the same plane as the mounting rod, and detection signals from the measurement head and displacement meter are used to detect the displacement of the spindle tip by the total thermal displacement of the spindle head and spindle. A main spindle thermal displacement correction device for a machine tool, comprising a feed rate correction means for correcting a feed rate of the machine tool.
JP12356888A 1988-05-20 1988-05-20 Main spindle thermal displacement correcting device for machine tool Pending JPH01295743A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP12356888A JPH01295743A (en) 1988-05-20 1988-05-20 Main spindle thermal displacement correcting device for machine tool
US07/352,470 US4919575A (en) 1988-05-20 1989-05-16 Apparatus for compensating for the thermal displacement of the main spindle of a machine tool
EP19890108974 EP0343517A3 (en) 1988-05-20 1989-05-18 Apparatus for compensating for the thermal displacement of the main spindle of a machine tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12356888A JPH01295743A (en) 1988-05-20 1988-05-20 Main spindle thermal displacement correcting device for machine tool

Publications (1)

Publication Number Publication Date
JPH01295743A true JPH01295743A (en) 1989-11-29

Family

ID=14863800

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12356888A Pending JPH01295743A (en) 1988-05-20 1988-05-20 Main spindle thermal displacement correcting device for machine tool

Country Status (1)

Country Link
JP (1) JPH01295743A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5795112A (en) * 1995-09-22 1998-08-18 Okuma Corporation Method for compensating a component of a machine tool for displacement caused by heat
JP2006212765A (en) * 2005-02-07 2006-08-17 Enshu Ltd Thermal displacement correcting method of machine tool
JP2015093359A (en) * 2013-11-13 2015-05-18 株式会社ジェイテクト Grinder
JP2016112635A (en) * 2014-12-12 2016-06-23 Towa株式会社 Cutting device and cutting method
JP2021133434A (en) * 2020-02-25 2021-09-13 三井精機工業株式会社 Thermal displacement countermeasure structure of feed shaft of machine tool

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6190804A (en) * 1984-10-08 1986-05-09 Hitachi Seiko Ltd Spindle position control for machine tool

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6190804A (en) * 1984-10-08 1986-05-09 Hitachi Seiko Ltd Spindle position control for machine tool

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5795112A (en) * 1995-09-22 1998-08-18 Okuma Corporation Method for compensating a component of a machine tool for displacement caused by heat
JP2006212765A (en) * 2005-02-07 2006-08-17 Enshu Ltd Thermal displacement correcting method of machine tool
JP2015093359A (en) * 2013-11-13 2015-05-18 株式会社ジェイテクト Grinder
JP2016112635A (en) * 2014-12-12 2016-06-23 Towa株式会社 Cutting device and cutting method
JP2021133434A (en) * 2020-02-25 2021-09-13 三井精機工業株式会社 Thermal displacement countermeasure structure of feed shaft of machine tool

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