JPH0754037A - Inspecting instrument of quenched part - Google Patents
Inspecting instrument of quenched partInfo
- Publication number
- JPH0754037A JPH0754037A JP5199692A JP19969293A JPH0754037A JP H0754037 A JPH0754037 A JP H0754037A JP 5199692 A JP5199692 A JP 5199692A JP 19969293 A JP19969293 A JP 19969293A JP H0754037 A JPH0754037 A JP H0754037A
- Authority
- JP
- Japan
- Prior art keywords
- quenching
- sectional area
- quenched
- inspection
- measurement data
- 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.)
- Withdrawn
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- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱処理されたワークの
焼入れ部の検査装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection device for a hardened portion of a heat-treated work.
【０００２】[0002]
【従来の技術】例えば鋳鉄製のシリンダブロックを用い
たエンジンにおいて、シリンダブロックの筒穴（シリン
ダボア）の内面に耐摩耗性のライナ−を挿入することが
行われているが、部品点数の削減やコストの低減化を図
るために、ライナーを用いないシリンダブロックが要望
されている。ライナーレスのシリンダブロックは、その
筒穴内面に直接ピストンやピストンリングが接するた
め、例えば自動車用エンジンのように高回転域で使われ
るエンジンにおいては、筒穴内面の耐摩耗性をいかにし
て高めるかが重要な課題である。2. Description of the Related Art For example, in an engine using a cast iron cylinder block, a wear resistant liner is inserted into an inner surface of a cylinder hole (cylinder bore) of the cylinder block, but it is necessary to reduce the number of parts. A cylinder block that does not use a liner has been desired to reduce costs. In a linerless cylinder block, the piston and piston ring are in direct contact with the inner surface of the cylinder hole, so how to improve the wear resistance of the inner surface of the cylinder hole in an engine used in a high rotation range such as an automobile engine. Is an important issue.
【０００３】そこで筒穴の耐摩耗性を高める手段とし
て、筒穴内面を焼入れ等の熱処理によって調質すること
が考えられている。このため本発明者らは、シリンダブ
ロックの筒穴内面にレーザビームによるスポット状の焼
入れを行う技術を開発し、種々の試験と試作等を行って
きた。レーザビームによる焼入れは、筒穴の内面に高密
度エネルギーを集中させて短時間の局部急速加熱を行っ
たのち、シリンダブロック内部への熱拡散による自己冷
却作用によって急冷させ、マルテンサイト組織を得るよ
うにしている。Therefore, as a means for increasing the wear resistance of the cylindrical hole, it has been considered to temper the inner surface of the cylindrical hole by heat treatment such as quenching. Therefore, the present inventors have developed a technique for performing spot-shaped quenching on the inner surface of the cylinder hole of the cylinder block with a laser beam, and have conducted various tests and trial production. In quenching with a laser beam, high-density energy is concentrated on the inner surface of the cylinder hole to perform local rapid heating for a short time, and then rapidly cooled by the self-cooling action by thermal diffusion inside the cylinder block to obtain a martensite structure. I have to.
【０００４】[0004]
【発明が解決しようとする課題】上述のようなスポット
状の部分焼入れが行われたワークは、一定の品質を維持
するために、焼入れ深さなどを正確に管理することが肝
要である。焼入れ深さを評価するための従来の手段とし
て、焼入れ部を含む検査領域を切断し、焼入れ組織の観
察に必要な表面処理を行ったのち、顕微鏡による光学的
手段により、焼入れ深さや焼入れ部の面積などを検査す
ることが行われている。It is important to accurately control the quenching depth and the like of the work which has been spot-quenched as described above in order to maintain a constant quality. As a conventional means for evaluating the quenching depth, after cutting the inspection area including the quenching part and performing the surface treatment necessary for observing the quenching structure, the quenching depth and the quenching part The area is being inspected.
【０００５】このため従来は、焼入れ部の検査に当たっ
てワークを切断するといった手間のかかる作業が必要で
あるばかりでなく、検査に高度な技術と長時間を必要と
し、しかもサンプリングされたワークは製品として使用
できなくなるためサンプル数に限界があり、サンプル数
をあまり多くとると歩留まりに悪影響が出るなどの問題
があった。For this reason, conventionally, not only a laborious work such as cutting the work for inspecting the quenching portion is required, but also high technology and a long time are required for the inspection, and the sampled work is a product. Since it cannot be used, there is a limit to the number of samples, and if the number of samples is too large, the yield will be adversely affected.
【０００６】従って本発明の目的は、レーザによって部
分焼入れされたワークの焼入れ部の焼入れ深さなどを非
破壊で能率良く検査することができるような検査装置を
提供することにある。Therefore, an object of the present invention is to provide an inspection apparatus capable of nondestructively and efficiently inspecting the hardening depth of a hardened portion of a work partially hardened by a laser.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、レーザビ
ームによってスポット状の部分焼入れを施した筒穴内面
の表面あらさを調べている時に、この焼入れ部のマルテ
ンサイト組織の表面が非焼入れ部の表面よりも盛り上が
っていることを見出だした。しかもこの表面膨張部分の
断面積の大きさと焼入れ深さに相関性があることも判っ
た。すなわち焼入れ深さが深いものは、焼入れが浅いも
のに比べて表面膨張部分の断面積が大きいことを突き止
めた。The present inventors have investigated the surface roughness of the inner surface of a cylindrical hole that has been spot-quenched by a laser beam and found that the surface of the martensite structure in this quenched portion is non-quenched. I found that it was higher than the surface of the part. Moreover, it was also found that there is a correlation between the size of the cross-sectional area of this surface-expanded portion and the quenching depth. That is, it was found that the one having a deep quenching depth has a larger cross-sectional area of the surface expansion portion than the one having a shallow quenching.
【０００８】従って前記目的を果たすために開発された
本発明は、レーザ焼入れによって部分的に焼入れがなさ
れたワークの焼入れ部を検査するための装置であって、
上記焼入れ部を含む検査領域の表面を一定の検査方向に
走査することによりこの検査領域の表面膨張部分の盛り
上がり高さを検出して形状測定データを得る表面測定機
と、上記表面測定機によって得られた形状測定データに
基いて上記表面膨張部分の断面積を求めるとともに、こ
の断面積を予め設定された基準値と比較しかつ上記断面
積が上記基準値に達している場合にこの焼入れ部の焼入
れ深さが所定の目標値に達していると判断する演算制御
部とを具備している。Therefore, the present invention developed to achieve the above object is an apparatus for inspecting a hardened portion of a work which is partially hardened by laser hardening.
A surface measuring machine that obtains shape measurement data by detecting the rising height of the surface expansion portion of the inspection area by scanning the surface of the inspection area including the quenching portion in a certain inspection direction, and obtain by the surface measuring machine. While determining the cross-sectional area of the surface expansion portion based on the obtained shape measurement data, comparing the cross-sectional area with a preset reference value and when the cross-sectional area has reached the reference value of the quenched portion And a calculation control unit that determines that the quenching depth has reached a predetermined target value.
【０００９】[0009]
【作用】レーザビームによる部分焼入れは加熱面積が小
さいため、レーザビームをワーク表面の特定方向に走行
させながらビーム照射による高密度エネルギーを集中さ
せ、短時間でワーク表面の局部急速加熱を行う。レーザ
照射後は、加熱された箇所の熱がワークの内部に拡散す
ることによって急冷されるため、この自己冷却作用によ
って焼入マルテンサイト組織が得られる。Since partial heating by the laser beam has a small heating area, high-density energy due to beam irradiation is concentrated while the laser beam travels in a specific direction on the surface of the work, and local rapid heating of the work surface is performed in a short time. After the laser irradiation, the heat of the heated portion is diffused into the inside of the work to be rapidly cooled, so that the quenching martensite structure is obtained by this self-cooling action.
【００１０】上述の焼入れ部の非破壊検査を本発明の検
査装置によって行い、焼入れ深さを評価する。すなわち
表面測定機によって検査領域の表面を走査し、表面膨張
部分の盛り上がり高さを検出することにより、形状測定
データを得る。そしてこの形状測定データに基き、演算
制御部において、積分等の適宜の計算方法により、表面
膨張部分の断面積を算出する。この演算制御部において
は、算出された表面膨張部分の断面積を基準値と比較
し、断面積が基準値に達している場合に所定の焼入れ深
さが得られていると判断する。The above-mentioned non-destructive inspection of the hardened portion is carried out by the inspection apparatus of the present invention to evaluate the hardened depth. That is, the surface of the inspection area is scanned by the surface measuring machine, and the height of the rising of the surface expansion portion is detected to obtain the shape measurement data. Then, based on this shape measurement data, the arithmetic control unit calculates the cross-sectional area of the surface expansion portion by an appropriate calculation method such as integration. In this arithmetic control unit, the calculated cross-sectional area of the surface expansion portion is compared with a reference value, and when the cross-sectional area reaches the reference value, it is determined that a predetermined quenching depth has been obtained.
【００１１】[0011]
【実施例】以下に本発明の一実施例について、図面を参
照して説明する。図６は、ワークの一例として鋳鉄製シ
リンダブロック１０を示している。このシリンダブロッ
ク１０は、ピストン１１が挿入される筒穴１２を有して
おり、この筒穴１２の内面１２ａに、図７に示すような
多数のスポット状レーザ焼入れ部１５が設けられてい
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 6 shows a cast iron cylinder block 10 as an example of the work. The cylinder block 10 has a cylindrical hole 12 into which the piston 11 is inserted, and the inner surface 12a of the cylindrical hole 12 is provided with a large number of spot-shaped laser hardening portions 15 as shown in FIG.
【００１２】各焼入れ部１５は互いに実質的に共通の形
状であり、それぞれ筒穴１２の周方向に沿う横長な形状
をなしている。焼入れ部１５の長さＬの一例は１５mm、
幅Ｗの一例は３．５mm前後である。焼入れ深さの一例は
０．２mm以上が望ましいが、熱処理の目的によっては１
０〜１５μｍ程度の焼入れ深さでも効果が認められる場
合がある。これらの焼入れ部１５は、筒穴１２の周方向
に所定ピッチで複数箇所に設けられているとともに、筒
穴１２の軸線方向に所定ピッチＰで複数列（例えば６
列）設けられている。ピッチＰの一例は５mmである。The quenching portions 15 have substantially the same shape, and each has a laterally long shape along the circumferential direction of the cylindrical hole 12. An example of the length L of the quenching portion 15 is 15 mm,
An example of the width W is around 3.5 mm. An example of the quenching depth is 0.2mm or more, but depending on the purpose of heat treatment,
The effect may be recognized even at a quenching depth of about 0 to 15 μm. These quenching portions 15 are provided at a plurality of locations at a predetermined pitch in the circumferential direction of the cylindrical hole 12, and are arranged in a plurality of rows at a predetermined pitch P in the axial direction of the cylindrical hole 12 (for example, 6
Rows) are provided. An example of the pitch P is 5 mm.
【００１３】上記焼入れ部１５は、図８に例示したレー
ザ焼入れ装置２０によって焼入れが行われる。この焼入
れ装置２０は、筒穴１２の内部に挿入される加工ヘッド
２１と、レーザ発生手段の一例としてＣＯ2 レーザ発振
器２２と、このレーザ発振器２２によって発生させたレ
ーザビームを加工ヘッド２１に導く光学系２３などを備
えている。このレーザ焼入れ装置２０によって筒穴１２
の内面１２ａに周方向に所定間隔でレーザビームを走行
させながら高密度エネルギーを集中させ、チル（溶融）
を出さない程度の温度まで短時間で急速加熱を行う。加
熱温度の一例は９８０℃〜１１００℃であり、要するに
鋳鉄のＡ1 変態点以上の温度に設定される。加熱時間の
一例は０．２秒程度である。The hardening portion 15 is hardened by the laser hardening device 20 illustrated in FIG. The quenching device 20 includes a machining head 21 inserted into the cylindrical hole 12, a CO 2 laser oscillator 22 as an example of a laser generating means, and an optical system for guiding a laser beam generated by the laser oscillator 22 to the machining head 21. The system 23 and the like are provided. With this laser hardening device 20, the cylindrical hole 12
Chill (melt) the inner surface 12a of the chill while concentrating high-density energy while traveling the laser beam at a predetermined interval in the circumferential direction.
Rapid heating is performed in a short time to a temperature that does not produce An example of the heating temperature is 980 ° C to 1100 ° C, which is set to a temperature equal to or higher than the A 1 transformation point of cast iron. An example of heating time is about 0.2 seconds.
【００１４】レーザ発振器２２は、個々の焼入れ部１５
において蓄熱状況を考慮したパワーに個別設定され、Ｎ
Ｃパワー制御が実行される。レーザビームによって急速
加熱された箇所は、レーザの照射を停止した時に、熱が
急速にシリンダブロック１０内を伝って拡散し、急冷状
態になることによって、焼入れ前のパーライトとフェラ
イトの混合組織が焼入れマルテンサイトに変化する。こ
うして、筒穴１２の円周方向に順次焼入れが実施され
る。The laser oscillator 22 includes individual quenching parts 15
In N, the power is individually set in consideration of the heat storage situation, and N
C power control is executed. At the portion rapidly heated by the laser beam, when the laser irradiation is stopped, the heat rapidly diffuses in the cylinder block 10 and is rapidly cooled, whereby the mixed structure of pearlite and ferrite before quenching is quenched. Change to martensite. In this way, quenching is sequentially performed in the circumferential direction of the cylindrical hole 12.
【００１５】焼入れ部１５においては、後述する形状測
定データのように、マルテンサイト組織の表面が非焼入
れ部の表面よりも盛り上がっており、しかもこの表面膨
張部分の断面積の大きさと焼入れ深さに相関性が認めら
れる。すなわち、焼入れ深さが深いものは、焼入れが浅
いものに比べて表面膨張部分の断面積が広くなってい
る。In the hardened portion 15, the surface of the martensite structure is higher than the surface of the non-hardened portion, and the size of the cross-sectional area and the quenching depth of the surface-expanded portion are different, as shown in the shape measurement data described later. Correlation is recognized. That is, in the case of deep quenching, the cross-sectional area of the surface expansion portion is wider than in the case of shallow quenching.
【００１６】上記焼入れ部１５を検査するための検査装
置３０の概略は図１に示されるようなものである。すな
わちこの検査装置３０は、表面測定機３１と演算制御部
３２を備えている。表面測定機３１の一例は、表面あら
さ測定機を適用することができる。この表面測定機３１
は、焼入れ部１５を含む検査領域３５の表面に接触させ
られるプローブ３６を備えており、このプローブ３６の
先端を検査領域３５の表面に接触させた状態で、図中の
矢印Ｙ方向、すなわち焼入れ部１５を横断する方向に沿
って走査しながら、プローブ３６の変位量を電気的な信
号に変換することで、検査領域３５の表面の凹凸を検出
し、表面膨張部分の高さと検出位置との関係等により、
例えば図２〜図４に示すような形状測定データを得るよ
うになっている。An outline of an inspection device 30 for inspecting the quenching portion 15 is as shown in FIG. That is, the inspection device 30 includes a surface measuring machine 31 and a calculation control unit 32. As an example of the surface measuring machine 31, a surface roughness measuring machine can be applied. This surface measuring machine 31
Includes a probe 36 that is brought into contact with the surface of the inspection region 35 including the quenching portion 15. With the tip of the probe 36 brought into contact with the surface of the inspection region 35, the arrow Y direction in the drawing, that is, quenching By scanning the displacement amount of the probe 36 into an electric signal while scanning along the direction crossing the portion 15, the unevenness of the surface of the inspection region 35 is detected, and the height of the surface expansion portion and the detection position are detected. Depending on the relationship,
For example, shape measurement data as shown in FIGS. 2 to 4 is obtained.
【００１７】演算制御部３２は、表面測定機３１によっ
て求められた上記形状測定データに基いて、表面膨張部
分の断面積をマイクロコンピュータなどの演算回路によ
り、積分等の適宜の計算方法を用いて算出する。そして
算出された断面積を予め設定された基準値と比較し、検
出された断面積が上記基準値に満たない場合には焼入れ
深さが所定の目標値に達していないと判断し、その判定
結果を出力装置４０などに表示するようになっている。
なお、表面測定機３１と演算制御部３２が実質的に一体
化していてもかまわない。Based on the shape measurement data obtained by the surface measuring machine 31, the arithmetic control unit 32 uses an appropriate calculation method such as integration to calculate the cross-sectional area of the surface expansion portion by an arithmetic circuit such as a microcomputer. calculate. Then, the calculated cross-sectional area is compared with a preset reference value, and if the detected cross-sectional area is less than the reference value, it is determined that the quenching depth has not reached a predetermined target value, and the determination is made. The result is displayed on the output device 40 or the like.
The surface measuring device 31 and the arithmetic control unit 32 may be substantially integrated.
【００１８】次に、上記構成の検査装置３０の作用につ
いて説明する。レーザ焼入れ装置２０によって上述の焼
入れが行われた検査領域３５に、表面測定機３１のプロ
ーブ３６を接触させる。そしてプローブ３６を矢印Ｙ方
向に移動させながら検査領域３５の盛り上がり高さと幅
などの表面状態を検出し、形状測定データを得る。Next, the operation of the inspection device 30 having the above configuration will be described. The probe 36 of the surface measuring machine 31 is brought into contact with the inspection region 35 that has been hardened by the laser hardening device 20. Then, while moving the probe 36 in the direction of the arrow Y, surface conditions such as the height and width of the inspection region 35 are detected to obtain shape measurement data.
【００１９】焼入れ部１５の焼入れ深さが深い場合、例
えば図２に示すような波形の形状測定データが得られ
る。このように焼入れ深さが深い場合、表面膨張部分の
形状はおおむね上に凸の半円形となり、その断面積も大
きな値が得られる。これに対し焼入れ深さが不足してい
る場合には、図３に示すように表面膨張部分の幅が比較
的狭く、しかも三角形に近い尖った断面形状となり、断
面積も小さい値となる。また、焼入れ部１５にチル（溶
融）が生じた場合は、図４に示すように表面膨張部分の
頂部において凹んだ部分が見られ、その分だけ断面積も
減少している。When the quenching depth of the quenching portion 15 is deep, for example, waveform shape measurement data as shown in FIG. 2 is obtained. When the quenching depth is deep in this way, the shape of the surface-expanded portion is a generally semi-circular shape with a convex shape, and a large cross-sectional area is obtained. On the other hand, when the quenching depth is insufficient, as shown in FIG. 3, the width of the surface-expanded portion is relatively narrow, and the cross-section has a sharp triangular shape and the cross-sectional area is small. Further, when chill (melting) occurs in the hardened portion 15, a recessed portion is seen at the top of the surface expansion portion as shown in FIG. 4, and the cross-sectional area is reduced accordingly.
【００２０】これらの波形をもつ形状測定データに基い
て、演算制御部３２において、表面膨張部分の断面積を
算出する。図５に示されるように、表面膨張部分の断面
積がある一定の基準値Ａを越えると、焼入れ深さが目標
値を越えるレベルＢ以上に達していることが予め実測に
より確認されている。Based on the shape measurement data having these waveforms, the arithmetic control unit 32 calculates the cross-sectional area of the surface expansion portion. As shown in FIG. 5, when the cross-sectional area of the surface-expanded portion exceeds a certain reference value A, it has been previously confirmed by measurement that the quenching depth has reached a level B or more, which exceeds the target value.
【００２１】図５の例では表面膨張部分の断面積が 180
ポイント以上であれば、目標とする焼入れ深さ０．２mm
をクリアできるため、この例では基準値を例えば 180ポ
イントに設定する。そして上記断面積がこの基準値に達
しているか否かを演算制御部３２で判断し、基準値に達
している場合は目標とする焼入れ深さが得られていると
判断し、その結果を出力装置４０などに表示する。断面
積が基準値に達していない場合は、焼入れ深さが不足し
ていると判断する。In the example of FIG. 5, the cross-sectional area of the surface expansion portion is 180
If it is above the point, the target quenching depth is 0.2 mm
In this example, the reference value is set to 180 points, for example. Then, the arithmetic control unit 32 determines whether or not the cross-sectional area has reached this reference value. If it has reached the reference value, it is determined that the target quenching depth has been obtained, and the result is output. It is displayed on the device 40 or the like. If the cross-sectional area does not reach the standard value, it is judged that the quenching depth is insufficient.
【００２２】このように上記検査装置３０は、焼入れ部
１５に生じた表面膨張部分のデータに基いて焼入れ深さ
を判断するため、検査領域３５を切断する必要がなくし
かも短時間のうちに検査結果が得られる。このため、レ
ーザによる部分焼入れの品質評価を迅速に行う上できわ
めて有効である。As described above, since the inspection device 30 determines the quenching depth based on the data of the surface expansion portion generated in the quenching portion 15, it is not necessary to cut the inspection region 35 and the inspection is performed in a short time. The result is obtained. Therefore, it is extremely effective in promptly performing quality evaluation of partial hardening by laser.
【００２３】なお、表面測定機３１は、前記実施例で述
べた表面あらさ測定機を用いる代りに、例えば渦電流な
どを利用した非接触形のプローブを有する表面測定機な
どを用いて、前述の形状測定データを求めるようにして
もよい。また本発明は、シリンダブロック以外のワーク
の焼入れ部検査に適用できることは勿論である。As the surface measuring machine 31, instead of using the surface roughness measuring machine described in the above embodiment, for example, a surface measuring machine having a non-contact type probe utilizing eddy current or the like is used. The shape measurement data may be obtained. Further, it goes without saying that the present invention can be applied to the inspection of the hardened portion of works other than the cylinder block.
【００２４】[0024]
【発明の効果】本発明によれば、部分的に焼入れが行わ
れたワークの焼入れ深さを能率良く検査することがで
き、しかも非破壊検査であるからワークの全数を検査す
ることも可能であり、焼入れ部の品質を評価・管理する
上で大きな効果がある。According to the present invention, it is possible to efficiently inspect the quenching depth of a partially quenched work, and since it is a non-destructive inspection, it is possible to inspect all the works. Yes, there is a great effect in evaluating and managing the quality of the hardened part.
【図１】本発明の一実施例を示す検査装置の概略図。FIG. 1 is a schematic diagram of an inspection apparatus showing an embodiment of the present invention.
【図２】焼入れ深さが深い場合の形状測定データを示す
波形図。FIG. 2 is a waveform diagram showing shape measurement data when the quenching depth is deep.
【図３】焼入れ深さが浅い場合の形状測定データを示す
波形図。FIG. 3 is a waveform diagram showing shape measurement data when the quenching depth is shallow.
【図４】チルが発生した焼入れ部の形状測定データを示
す波形図。FIG. 4 is a waveform diagram showing shape measurement data of a quenched portion where chill has occurred.
【図５】焼入れ深さと表面膨張部分の断面積との関係を
示す図。FIG. 5 is a diagram showing a relationship between a quenching depth and a cross-sectional area of a surface expansion portion.
【図６】ワークの一例を示す斜視図。FIG. 6 is a perspective view showing an example of a work.
【図７】ワークの焼入れ部を示す正面図。FIG. 7 is a front view showing a quenched portion of the work.
【図８】レーザ焼入れ装置の概略図。FIG. 8 is a schematic view of a laser hardening device.
１０…シリンダブロック（ワーク）、１５…焼入れ部、
３０…検査装置、３１…表面測定機、３２…演算制御
部、３５…検査領域。10 ... Cylinder block (work), 15 ... Quenching part,
30 ... Inspection device, 31 ... Surface measuring machine, 32 ... Arithmetic control unit, 35 ... Inspection area.
Claims (1)
されたワークの焼入れ部を検査するための装置であっ
て、 上記焼入れ部を含む検査領域の表面を一定の検査方向に
走査することによりこの検査領域の表面膨張部分の盛り
上がり高さを検出して形状測定データを得る表面測定機
と、上記表面測定機によって得られた形状測定データに
基いて上記表面膨張部分の断面積を求めるとともに、こ
の断面積を予め設定された基準値と比較しかつ上記断面
積が上記基準値に達している場合にこの焼入れ部の焼入
れ深さが所定の目標値に達していると判断する演算制御
部とを具備したことを特徴とする焼入れ部の検査装置。1. An apparatus for inspecting a hardened portion of a work which has been partially hardened by laser hardening, wherein the inspection is performed by scanning a surface of an inspection region including the hardened portion in a predetermined inspection direction. A surface measuring machine that obtains the profile measurement data by detecting the rising height of the surface expansion part of the area, and the cross-sectional area of the surface expansion part is obtained based on the profile measurement data obtained by the surface measurement machine, and And an arithmetic control unit that compares the area with a preset reference value and determines that the quenching depth of the quenching portion has reached a predetermined target value when the cross-sectional area has reached the reference value. A quenching part inspection device characterized by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5199692A JPH0754037A (en) | 1993-08-11 | 1993-08-11 | Inspecting instrument of quenched part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5199692A JPH0754037A (en) | 1993-08-11 | 1993-08-11 | Inspecting instrument of quenched part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0754037A true JPH0754037A (en) | 1995-02-28 |
Family
ID=16412029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5199692A Withdrawn JPH0754037A (en) | 1993-08-11 | 1993-08-11 | Inspecting instrument of quenched part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0754037A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013234947A (en) * | 2012-05-10 | 2013-11-21 | Nissan Motor Co Ltd | Hardening area measuring apparatus and hardening area measuring method |
| CN114740489A (en) * | 2022-04-13 | 2022-07-12 | 江苏联宸激光科技有限公司 | Surface measuring equipment for measuring laser quenched surface |
-
1993
- 1993-08-11 JP JP5199692A patent/JPH0754037A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013234947A (en) * | 2012-05-10 | 2013-11-21 | Nissan Motor Co Ltd | Hardening area measuring apparatus and hardening area measuring method |
| CN114740489A (en) * | 2022-04-13 | 2022-07-12 | 江苏联宸激光科技有限公司 | Surface measuring equipment for measuring laser quenched surface |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20001031 |