JP2594118Y2 - Grinding equipment - Google Patents
Grinding equipmentInfo
- Publication number
- JP2594118Y2 JP2594118Y2 JP1993007576U JP757693U JP2594118Y2 JP 2594118 Y2 JP2594118 Y2 JP 2594118Y2 JP 1993007576 U JP1993007576 U JP 1993007576U JP 757693 U JP757693 U JP 757693U JP 2594118 Y2 JP2594118 Y2 JP 2594118Y2
- Authority
- JP
- Japan
- Prior art keywords
- work
- grinding
- stylus
- calculated
- workpiece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【考案の詳細な説明】[Detailed description of the invention]
【０００１】[0001]
【産業上の利用分野】本考案は、自動定寸装置を備えた
研削加工装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding machine having an automatic sizing device.
【０００２】[0002]
【従来の技術】例えば、自動定寸装置を装備した研削盤
では、加工中のワーク寸法をインプロセスゲージで連続
的に計測し、その計測値を研削盤の制御装置にフィード
バックして、研削砥石の切込送りを自動的に制御するよ
うにしている。その際、研削熱によるワークの熱膨張を
クーラントによって抑制すると共に、通常、ワークの熱
膨張量を適宜の手段で検出・演算し、この演算値に基づ
いてインプロセスゲージの零点を補正するといった制御
手段を採っている。2. Description of the Related Art For example, in a grinding machine equipped with an automatic sizing device, the size of a workpiece being machined is continuously measured with an in-process gauge, and the measured value is fed back to a control device of the grinding machine to provide a grinding wheel. Is automatically controlled. At this time, the thermal expansion of the work due to the grinding heat is suppressed by the coolant, and the amount of thermal expansion of the work is normally detected and calculated by appropriate means, and the zero point of the in-process gauge is corrected based on the calculated value. Is taking measures.
【０００３】ところで、インプロセスゲージは、一般
に、加工中のワークの加工面に接触する触針部と、この
触針部の変位量を検出・演算等し、これを計測信号とし
て外部に出力するゲージ本体とで構成されるものである
が、例えば、軸受製造における内・外輪の転走面研削で
は、ワークとなる内・外輪をマグネットチャックによっ
て吸着保持しながら加工を行なうので、マグネットチャ
ックの磁力による影響を回避するため、触針部が非磁性
のステンレス鋼からなるインプロセスゲージを使用する
場合が多い。In general, an in-process gauge detects a stylus portion in contact with a processing surface of a work being processed and a displacement amount of the stylus portion, and outputs it as a measurement signal to the outside. For example, in the rolling surface grinding of the inner and outer races in the manufacture of bearings, machining is performed while holding the inner and outer races, which are workpieces, by means of a magnet chuck. In many cases, an in-process gauge in which the stylus portion is made of non-magnetic stainless steel is used in order to avoid the influence of the above.
【０００４】[0004]
【考案が解決しようとする課題】触針部は常時ワークの
加工面に接触しているため、ワークからの熱量流入や、
加工によって温まったクーラントがかかることにより温
度上昇を生じる場合がある。触針部に温度上昇が生じる
と、その熱膨張や熱変形によってインプロセスゲージの
零点が変動してしまい、計測誤差を生じさせる。[Problem to be Solved by the Invention] Since the stylus portion is in constant contact with the work surface of the work, heat flow from the work,
In some cases, a temperature rise may be caused by the coolant heated by the processing. When the temperature of the stylus rises, the zero point of the in-process gauge fluctuates due to the thermal expansion or thermal deformation, and a measurement error occurs.
【０００５】本考案は、触針部の熱膨張に起因した計測
誤差を抑制し、より高精度の寸法計測を可能にしようと
するものである。SUMMARY OF THE INVENTION The present invention is intended to suppress a measurement error caused by thermal expansion of a stylus portion and to enable more accurate dimensional measurement.
【０００６】[0006]
【課題を解決するための手段】本考案の研削加工装置
は、ワークを吸着保持し、適宜の手段で回転駆動される
マグネットチャックと、砥石軸駆動モータによって回転
駆動され、ワークの加工面を研削加工する砥石と、ワー
クの加工面に接触する触針部を有し、その触針部が非磁
性ステンレス鋼よりも線膨張係数の小さな材料で形成さ
れたインプロセスゲージと、砥石軸駆動モータの研削動
力を測定する研削動力測定部と、研削動力測定部からの
研削動力信号に基づいて加工中のワークの熱膨張量を演
算し、この熱膨張量の演算値と、インプロセスゲージに
よって計測される加工中のワークの計測寸法とから、ワ
ークの実寸法を算出し、この実寸法の算出値に基づいて
砥石の切込送りを制御する制御装置とを備えていること
を特徴とする。The grinding apparatus of the present invention holds a workpiece by suction, and is driven to rotate by a magnet chuck driven by a suitable means and a grindstone drive motor to grind a workpiece surface. A whetstone to be machined, a stylus part that comes into contact with the work surface of the work, the stylus part of which is formed of a material having a smaller linear expansion coefficient than non-magnetic stainless steel; Calculates the thermal expansion of the work being processed based on the grinding power signal from the grinding power measurement unit and the grinding power measurement unit that measures the grinding power, and calculates the calculated value of this thermal expansion and the in-process gauge. And a control device for calculating the actual dimensions of the work from the measured dimensions of the work being processed, and controlling the cutting and feeding of the grindstone based on the calculated value of the actual dimensions.
【０００７】[0007]
【作用】触針部の温度上昇による熱膨張が、従来に比べ
抑制されるので、寸法計測の精度が向上する。The thermal expansion due to the rise in the temperature of the stylus is suppressed as compared with the prior art, so that the accuracy of the dimension measurement is improved.
【０００８】[0008]
【実施例】以下、本考案の実施例について説明する。Embodiments of the present invention will be described below.
【０００９】図１は、研削加工装置におけるワークＷの
寸法制御システムの一例を示すブロック線図である。同
図において、ワークＷは例えば軸受内輪であり、図示さ
れていないマグネットチャックに吸着保持され、適宜の
手段で回転駆動される。砥石１は機械ベッド２上をスラ
イド可能な砥石台３に装着され、砥石軸駆動モータ４に
より回転駆動される。そして、制御装置５からの送り駆
動制御信号Ａで制御される切込送り駆動部６によって切
込送り動作を与えられる。ワークＷの研削が開始される
と、研削動力信号Ｃが、砥石軸駆動モータ４から研削動
力測定部７を介して制御装置５に入力される。制御装置
５は、この研削動力信号Ｃに基づいてワークＷの熱膨張
量を演算算出する。尚、本考案はワークＷの熱膨張量の
演算手段についてはその如何を問わないが、例えば、本
出願人による特公平４−４８５８４号公報記載の手段、
あるいは、本出願人による特願平３−２１９７２８号記
載の手段等を採用すると良い。[0009] Figure 1 is a block diagram showing an example of a dimensional control system of the workpiece W in the grinding apparatus. In the figure, a work W is, for example, a bearing inner ring, is attracted and held by a magnet chuck (not shown), and is rotationally driven by appropriate means. The grindstone 1 is mounted on a grindstone base 3 slidable on a machine bed 2 and is rotationally driven by a grindstone shaft drive motor 4. Then, a cut feed operation is given by a cut feed drive unit 6 controlled by a feed drive control signal A from the control device 5. When the grinding of the workpiece W is started, a grinding power signal C is input from the grinding wheel drive motor 4 to the control device 5 via the grinding power measuring unit 7. The control device 5 calculates and calculates the thermal expansion amount of the work W based on the grinding power signal C. In the present invention, any means may be used for calculating the thermal expansion amount of the work W. For example, for example, a means described in Japanese Patent Publication No.
Alternatively, the means described in Japanese Patent Application No. 3-219728 filed by the present applicant may be employed.
【００１０】一方、加工中のワークＷの寸法は、インプ
ロセスゲージＧによって連続的に計測され、寸法計測信
号Ｂとして制御装置５に入力される。制御装置５は、イ
ンプロセスゲージＧによる計測寸法から上記熱膨張量を
マイナスしてワークＷの実寸法を算出し、この実寸法に
基づいて切込送り駆動部６に送り駆動制御信号Ａを出力
し、砥石１の切込送りを制御する。On the other hand, the dimensions of the workpiece W being processed are continuously measured by the in-process gauge G and are input to the control device 5 as a dimension measurement signal B. The control device 5 calculates the actual size of the work W by subtracting the thermal expansion amount from the measurement size measured by the in-process gauge G, and outputs a feed drive control signal A to the cut feed drive unit 6 based on the actual size. Then, the cutting feed of the grindstone 1 is controlled.
【００１１】インプロセスゲージＧはワークＷの加工面
Ｗａに接触する一対の触針部Ｇ１およびＧ２と、触針部
Ｇ１、Ｇ２の変位量を検知して加工面Ｗａの直径寸法Ｄ
ａを演算するゲージ本体Ｇ３とからなり、図２に模式的
に示すように、触針部Ｇ１（触針部Ｇ２も同一構造）
は、接触部分となるコンタクトＧ１ａ、コンタクトＧ１
ａの変位をゲージ本体Ｇ３に伝えるフィーラーＧ１ｂと
で構成される。本実施例では、触針部Ｇ１、Ｇ２を、例
えば、インバー、ノビナイト鋳鉄等の低熱膨張材、また
は、Ｓｉ3Ｎ4、ＳｉＣ等のセラミック材で形成してあ
る。これらの材料は、線膨張係数が非磁性ステンレス鋼
よりも小さいので、ワークＷからの熱量流入によって生
じる熱膨張量が従来よりも小さい。そのため、触針部Ｇ
１、Ｇ２の熱膨張に起因した計測誤差が生じにくく、よ
り高精度の寸法計測が可能となる。The in-process gauge G detects a pair of stylus portions G1 and G2 that come into contact with the processing surface Wa of the workpiece W and the amount of displacement of the stylus portions G1 and G2 to detect the diameter D of the processing surface Wa.
and a gauge body G3 for calculating a, and as schematically shown in FIG. 2, a stylus portion G1 (the stylus portion G2 also has the same structure).
Are the contacts G1a and G1 to be the contact portions.
and a feeler G1b for transmitting the displacement of a to the gauge body G3. In the present embodiment, the stylus portions G1 and G2 are formed of, for example, a low thermal expansion material such as invar or nobinite cast iron, or a ceramic material such as Si 3 N 4 or SiC. Since these materials have a smaller coefficient of linear expansion than nonmagnetic stainless steel, the amount of thermal expansion caused by the inflow of heat from the work W is smaller than before. Therefore, the stylus portion G
1. Measurement errors due to thermal expansion of G2 are unlikely to occur, and more accurate dimensional measurement is possible.
【００１２】[0012]
【考案の効果】以上説明したように、本考案によれば、
インプロセスゲージの触針部を非磁性ステンレス鋼より
も線膨張係数の小さな材料で形成したので、接触部の熱
膨張に起因した計測誤差が生じにくく、より高精度の寸
法計測を行なうことが可能となる。[Effects of the Invention] As described above, according to the present invention,
Since the stylus of the in-process gauge is made of a material with a smaller coefficient of linear expansion than non-magnetic stainless steel, measurement errors due to thermal expansion of the contact part are less likely to occur, enabling more accurate dimensional measurement. Becomes
【図１】研削加工におけるワークの寸法制御システムの
一例を示すブロック線図である。FIG. 1 is a block diagram showing an example of a work size control system in a grinding process.
【図２】本考案の実施例に係わるインプロセスゲージの
触針部を模式的に示す図である。FIG. 2 is a diagram schematically illustrating a stylus portion of an in-process gauge according to the embodiment of the present invention.
Ｇ インプロセスゲージ Ｇ１ 触針部 Ｇ１ａ コンタクト Ｇ１ｂ フィーラー Ｇ２ 触針部 Ｗ ワーク Ｗａ 加工面 G In-process gauge G1 Contact part G1a Contact G1b Feeler G2 Contact part W Work Wa Work surface
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G01B 1/00 G01B 3/00 - 3/56 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) G01B 1/00 G01B 3/00-3/56
Claims (1)
駆動されるマグネットチャックと、砥石軸駆動モータに
よって回転駆動され、ワークの加工面を研削加工する砥
石と、ワークの加工面に接触する触針部を有し、その触
針部が非磁性ステンレス鋼よりも線膨張係数の小さな材
料で形成されたインプロセスゲージと、砥石軸駆動モー
タの研削動力を測定する研削動力測定部と、研削動力測
定部からの研削動力信号に基づいて加工中のワークの熱
膨張量を演算し、この熱膨張量の演算値と、インプロセ
スゲージによって計測される加工中のワークの計測寸法
とから、ワークの実寸法を算出し、この実寸法の算出値
に基づいて砥石の切込送りを制御する制御装置とを備え
ていることを特徴とする研削加工装置。1. A work is held by suction and rotated by an appropriate means.
Driven magnet chuck and wheel drive motor
Therefore, it is driven to rotate and grinds the work surface of the work.
It has a stylus that comes in contact with the stone and the work surface of the workpiece.
A material whose needle part has a smaller linear expansion coefficient than nonmagnetic stainless steel
In-process gauge formed by the material
Grinding power measurement unit that measures the grinding power of the
Heat of workpiece during machining based on grinding power signal from fixed part
The expansion amount is calculated, and the calculated value of the thermal expansion amount and the imp
Measured dimensions of the workpiece during processing measured by the gauge
And the actual dimension of the work is calculated, and the calculated value of the actual dimension
Control device for controlling the cutting feed of the grinding wheel based on the
A grinding apparatus .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993007576U JP2594118Y2 (en) | 1993-02-26 | 1993-02-26 | Grinding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993007576U JP2594118Y2 (en) | 1993-02-26 | 1993-02-26 | Grinding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0665801U JPH0665801U (en) | 1994-09-16 |
| JP2594118Y2 true JP2594118Y2 (en) | 1999-04-19 |
Family
ID=11669642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993007576U Expired - Fee Related JP2594118Y2 (en) | 1993-02-26 | 1993-02-26 | Grinding equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2594118Y2 (en) |
-
1993
- 1993-02-26 JP JP1993007576U patent/JP2594118Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0665801U (en) | 1994-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4824166B2 (en) | Method and grinding machine for process guides in peel grinding of workpieces | |
| US4551950A (en) | Truing apparatus for a grinding wheel with rounded corners | |
| JP2516382B2 (en) | Machining equipment with magnetic bearing as main shaft | |
| JPH07205023A (en) | Confirming method for dressing of superfine particle grinding wheel in nc grinding device | |
| JPH0241872A (en) | Numerical control grinder | |
| JPS62176758A (en) | Super-polishing grinding working method and grinder | |
| JPH0521705B2 (en) | ||
| JP5321813B2 (en) | Chamfering apparatus and chamfering method | |
| JP2008093787A (en) | Grinder | |
| JP2594118Y2 (en) | Grinding equipment | |
| EP0319265B1 (en) | Method and apparatus for use in grinding | |
| JPS63102872A (en) | Grinding method | |
| JP2000042886A (en) | Wafer chamfering grinding wheel inspecting method and device, and wafer chamfering method using this inspecting method | |
| JPS59192457A (en) | Positioner | |
| JP3777825B2 (en) | Precision grinding machine and grinding wheel radius measurement method | |
| JP2552537B2 (en) | Control method for grinding machine equipped with spindle device with bending detection means | |
| JPH06258050A (en) | Profile measuring apparatus for grinding wheel | |
| JP2588836Y2 (en) | Work size control device for grinding machine | |
| JPH01252343A (en) | Contact position detecting device and machine tool employing said device | |
| JP2748569B2 (en) | Grinding method | |
| JP2741459B2 (en) | Grinding machine with thermal displacement compensator | |
| JPH07186044A (en) | Grinding wheel deflection measuring device and grinding wheel truing device | |
| JPS58192749A (en) | Electric contact detecting method | |
| JPH10118925A (en) | Condition detecting device of machine tool | |
| JP3348561B2 (en) | Gap measurement method and apparatus in grinding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990112 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |