JPH01297537A - Inspecting device for pump cam surface of cam shaft - Google Patents
Inspecting device for pump cam surface of cam shaftInfo
- Publication number
- JPH01297537A JPH01297537A JP12787988A JP12787988A JPH01297537A JP H01297537 A JPH01297537 A JP H01297537A JP 12787988 A JP12787988 A JP 12787988A JP 12787988 A JP12787988 A JP 12787988A JP H01297537 A JPH01297537 A JP H01297537A
- Authority
- JP
- Japan
- Prior art keywords
- cam
- window
- image
- pump
- pump cam
- 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
Links
- 238000007689 inspection Methods 0.000 claims abstract description 17
- 230000007547 defect Effects 0.000 claims abstract description 12
- 238000003384 imaging method Methods 0.000 claims description 3
- 238000007665 sagging Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/9515—Objects of complex shape, e.g. examined with use of a surface follower device
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本Ｑ明は、カムシャフトのポンプカム面検査装置に関し
、更に詳しくは、ＴＩＧ焼入れ処理を行ったカムシャフ
トに対しても好適にポンプカム面の検査を行うことがで
きる検査装置に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a pump cam surface inspection device for camshafts, and more specifically, it is suitable for inspecting pump cam surfaces even for camshafts that have been subjected to TIG hardening treatment. The present invention relates to an inspection device capable of performing.
カムシャフトのポンプカム面検査装置の一般的構成は、
第１図に示すように、カムシャフトＳを所定の位置、角
度に保持するシャフト保持手段２と、カムシャフトＳの
画像を得るカメラ手段３と、前記シャフト保持手段２及
びカメラ手段３を制御してカムシャフトＳのポンプカム
面の検査を行う処理袋Ｗ１４とからなっている。The general configuration of a camshaft pump cam surface inspection device is as follows:
As shown in FIG. 1, a shaft holding means 2 that holds the camshaft S at a predetermined position and angle, a camera means 3 that obtains an image of the camshaft S, and a shaft holding means 2 and a camera means 3 that control the shaft holding means 2 and the camera means 3. and a processing bag W14 for inspecting the pump cam surface of the camshaft S.
従来装置では、シャフト保持手段２でカムシャフトＳを
移動し、ポンプカムＰをカメラ手段３の視野に入れる。In the conventional device, the camshaft S is moved by the shaft holding means 2 to bring the pump cam P into the field of view of the camera means 3.
なお、■はスラスト受、Ｉはインテークカム、Ｅはエキ
ゾーストカムである。Note that ■ is a thrust receiver, I is an intake cam, and E is an exhaust cam.
カメラ手段３で得られる画像は第８図に示すようになり
、そのＸ軸における明暗は第９図に示すようになる。つ
まり、ポンプカム面ＰＣの部分が明るく、軸Ａの部分が
暗くなる。そこで、適当な闇値Ｌ０を定めれば、ポンプ
カム面Ｐｅの端縁の位置Ｘ宜、Ｘ２を検出できる。The image obtained by the camera means 3 is as shown in FIG. 8, and its brightness on the X axis is as shown in FIG. 9. In other words, the pump cam surface PC part is bright and the axis A part is dark. Therefore, by determining an appropriate darkness value L0, the position X2 of the edge of the pump cam surface Pe can be detected.
そして、第１０図に示すように、検出した位置ｘ１、Ｘ
２間の領域を含むようにウィンドウＷを設定し、カムシ
ャフトＳを回転しつつ、前記ウィンドウＷ内に欠陥部分
があるか否かを検査している。Then, as shown in FIG. 10, the detected positions x1,
A window W is set to include the area between 2 and 2, and while the camshaft S is rotated, it is inspected whether or not there is a defective part within the window W.
近年、カムシャフトにＴＩＧ焼入れ処理が行われるよう
になったが、そのＴＩＧ焼入れ処理によってカムの端縁
に「だれ」が発生する場合がある。In recent years, camshafts have been subjected to TIG hardening, but this TIG hardening can sometimes cause droop on the edge of the cam.
第１１図に斜線を施した部分は「だれ」を表している。The shaded area in FIG. 11 represents "who".
ところが、第１２図および第１３図に示すように、「だ
れ」によってポンプカムＰの端縁Ｐａに対応するｉ！！
像部分は暗部になるので、実際の端縁ＰＪの位置ｘ、、
ｘ２よりも内側の位置Ｘ、＋δ１゜Ｘ２−δ２に端縁が
あるかのように誤って検出されることになる。However, as shown in FIGS. 12 and 13, the i! !
Since the image part will be a dark part, the actual position of the edge PJ x,
It will be erroneously detected as if there was an edge at position X, +δ1°X2−δ2, which is inside x2.
この場合、第１４図に示すように、ウィンドウＷがポン
プカムＰの実際の幅より小さくなり、「だれ」の部分が
ウィンドウＷ外へ出るので、欠陥の一つである「だれ」
を発見できない問題を生じる。In this case, as shown in FIG. 14, the window W becomes smaller than the actual width of the pump cam P, and the "whole" part extends outside the window W, which is one of the defects.
A problem arises in which it is not possible to discover.
従って、本発明の目的とするところは、ＴＩＧ焼入れ処
理によって「だれ」が発生しても好適にポンプカム面の
検査を行うことが出来るカムシャフトのポンプカム面検
査装置を提供することにある。Therefore, an object of the present invention is to provide a pump cam surface inspection device for a camshaft that can suitably inspect the pump cam surface even if "sagging" occurs due to the TIG hardening process.
本発明のカムシャフトのポンプカム面検査装置は、ＴＩ
Ｇ焼入れ処理を行ったカムシャフトのポンプカム面の欠
陥を検査するための装置であって、ポンプカムおよびポ
ンプカムに近接するインテークカムまたはエキゾースト
カムのベースサークル部分を含む第１の画像を得る第１
の撮像手段と、第１の画像の前記ベースサークル部分か
らポンプカム位置を算出してウィンドウ位置を決定する
ウィンドウ位置決定手段と、第１の画像に前記ウィンド
ウを設定するウィンドウ設定手段と、カムシャフトを回
転させてポンプカム面の画像を得つつウィンドウ内につ
いて欠陥の検査を行う検査手段とを具備してなることを
構成上の特徴とするものである。The camshaft pump cam surface inspection device of the present invention is a TI
A device for inspecting defects on a pump cam surface of a camshaft that has been subjected to a G-quenching treatment, the device obtaining a first image including a pump cam and a base circle portion of an intake cam or an exhaust cam adjacent to the pump cam.
an imaging means for determining the window position by calculating the pump cam position from the base circle portion of the first image; a window setting means for setting the window in the first image; The structure is characterized in that it includes an inspection means for inspecting the inside of the window for defects while rotating the pump cam to obtain an image of the pump cam surface.
ＴＩＧ焼入れ処理はカム面に対して行われるが、それは
ポンプカムの全周面およびインテークカム、エキゾース
トカムのカム部であり、インテークカム、エキゾースト
カムのベースサークル部（第２図のＩｂ）には行われな
い、従って、インテークカム、エキゾーストカムのベー
スサークル部には「だれ」が発生することはない。TIG hardening treatment is performed on the cam surface, which is the entire circumferential surface of the pump cam and the cam portions of the intake cam and exhaust cam. Therefore, there will be no "droop" in the base circle portions of the intake cam and exhaust cam.
そこで、インテークカムまたはエキゾーストカムのベー
スサークル部の画像に基づいてカムの位置を検出すれば
、「だれ」よる影響を受けないで実際のインテークカム
またはエキゾーストカムの位置が分かる。他方、インテ
ークカムまたはエキゾーストカムとポンプカムの距離は
精度高く製作されているから、前記インテークカムまた
はエキゾーストカムの位置からポンプカムの位置を精度
高く算出できる。従って、実際のポンプカムの位置に対
応させて適正にウィンドウ位置を決められすなわち、画
像の前記ウィンドウ位置にウィンドウを設定すれば、そ
のウィンドウ内にポンプカムの端縁も必ず含まれ、「だ
れ」が発生しておれば欠陥として発見されることになる
。Therefore, by detecting the position of the cam based on the image of the base circle portion of the intake cam or exhaust cam, the actual position of the intake cam or exhaust cam can be determined without being influenced by "who". On the other hand, since the distance between the intake cam or exhaust cam and the pump cam is manufactured with high precision, the position of the pump cam can be calculated with high precision from the position of the intake cam or exhaust cam. Therefore, if the window position can be determined appropriately in accordance with the actual position of the pump cam, that is, if a window is set at the window position in the image, the edge of the pump cam will always be included in the window, and "whoop" will occur. If you do, it will be discovered as a defect.
以下、図に示す実施例に基づいて本発明を更に詳しく説
明する。ここに第１図は本発明の一実施例のカムシャフ
トのポンプカム面検査装置の構成模式図、第２図は第１
の画像を得る状態のカム位置説明図、第３図は第１の画
像の例示図、第４図は第１の画像における明暗分布図、
第５図はカムシャフトを回転させてポンプカム面の画像
を得る一つの状態のカム位置説明図、第６図は第５図に
示す位置で得られる画像とウィンドウの例示図である。Hereinafter, the present invention will be explained in more detail based on embodiments shown in the drawings. Here, FIG. 1 is a schematic diagram of the configuration of a pump cam surface inspection device for a camshaft according to an embodiment of the present invention, and FIG.
3 is an illustration of the first image, and FIG. 4 is a diagram of the brightness distribution in the first image.
FIG. 5 is an explanatory view of the cam position in one state in which an image of the pump cam surface is obtained by rotating the camshaft, and FIG. 6 is an exemplary view of the image and window obtained at the position shown in FIG. 5.
なお、以下の実施例により本発明が限定されるものでは
ない。Note that the present invention is not limited to the following examples.
第１図に示すように、カムシャフトのポンプカム面検査
装置ｉ！１は、シャフト保持手段２と、カメラ手段３と
、処理手段４とからなっている。As shown in Fig. 1, the camshaft pump cam surface inspection device i! 1 consists of a shaft holding means 2, a camera means 3, and a processing means 4.
処理手段４は、シャフト保持手段２を駆動して、ポンプ
カムＰおよび隣接するインテークカムｒが同時にカメラ
手段３の視野に入るようにし、次いで、第２図に示すよ
うに、インテークカムＩのベースサークル部ｌしが撮像
方向く矢印）に向くようにする。The processing means 4 drives the shaft holding means 2 so that the pump cam P and the adjacent intake cam r are simultaneously in the field of view of the camera means 3, and then the base circle of the intake cam I, as shown in FIG. Make sure that the top part faces the direction of the image (arrow).
ここで得られる画像すなわち第１の画像は、第３図に示
すように、インテークカムＩのベースサークル部■トの
部分を含む画像となるが、ベースサークル部ＩしにはＴ
ＩＧ焼入れ処理がなされていないから、その端縁Ｉ、に
は「だれ」が発生していない。The image obtained here, that is, the first image, includes the base circle portion of the intake cam I, as shown in FIG.
Since the IG hardening process is not performed, there is no "sagging" on the edge I.
処理手段４は、第４図に示すように、第１の画像のＸ軸
上の明暗と所定の閾値Ｌ０とを比較し、インテークカム
ｌの位ＩＩ Ｘ ３を検出する。上述したように、イン
テークカムＩのベースサークル部■トの端縁！１には「
だれ」が発生していないから、正確にインテークカム■
の位置Ｘ３を得ることができる。As shown in FIG. 4, the processing means 4 compares the brightness of the first image on the X-axis with a predetermined threshold L0, and detects the position II x 3 of the intake cam l. As mentioned above, the edge of the base circle part of the intake cam I! 1 has “
The intake cam is accurate because no one has occurred.■
The position X3 can be obtained.
次に、処理手段４は、予め設定されていたポンプカムＰ
とインテークカムＩの距離定数ａ、ｂと前記位置Ｘ３と
に基づいて、ウィンドウ位置を算出する。すなわち、Ｘ
３−ａからＸ３−ｂまでの領域を含むようにウィンドウ
位置を決定する。Next, the processing means 4 processes the pump cam P which has been set in advance.
The window position is calculated based on the distance constants a and b of the intake cam I and the position X3. That is, X
The window position is determined to include the area from 3-a to X3-b.
そして、処理手段４は、その決定した位置にウィンドウ
Ｗを設定する。Then, the processing means 4 sets the window W at the determined position.
次ぎに、処理手段４は、シャフト保持手段２によりカム
シャフトＳを回転し、ポンプカム面ＰＣの各部を順にカ
メラ手段３で画像化しつつ、ウィンドウＷ内について欠
陥の検査を行う、その一つの状態を第５図および第６図
に示すが、第６図から理解されるように、ウィンドウＷ
はポンプカムＰを正しく含んでおり、従って、欠陥の一
種である端縁Ｐ−の「だれ」をも好適に発見し得ること
となる。Next, the processing means 4 rotates the camshaft S by the shaft holding means 2, sequentially images each part of the pump cam surface PC with the camera means 3, and inspects the inside of the window W for defects. As shown in FIGS. 5 and 6, as understood from FIG. 6, the window W
correctly includes the pump cam P, and therefore, it is possible to suitably discover the "looseness" of the edge P-, which is a type of defect.
本発明によれば、ＴＩＧ焼入れ処理を行ったカムシャフ
トのポンプカム面の欠陥を検査するための装置であうで
、ポンプカムおよびポンプカムに近接するインテークカ
ムまたはエキゾーストカムのベースサークル部分を含む
第１の画像を得る第１の撮像手段と、第１の画像の前記
ベースサークル部分からポンプカム位置を算出してウィ
ンドウ位置を決定するウィンドウ位置決定手段と、第１
の画像に前記ウィンドウを設定するウィンドウ設定手段
と、カムシャフトを回転させてポンプカム面の画像を得
つつウィンドウ内について欠陥の検査を行う検査手段と
を具備してなることを特徴とするカムシャフトのポンプ
カム面検査装置が提供され、これによりＴＩＣ焼入れ処
理を行ったカムシャフトの場合でも好適にポンプカム面
の検査を行うことが出来るようになる。According to the present invention, there is provided a device for inspecting defects on the pump cam surface of a camshaft that has been subjected to TIG hardening treatment, and the first image includes a pump cam and a base circle portion of an intake cam or an exhaust cam adjacent to the pump cam. a first imaging means for obtaining a first image; a window position determining means for determining a window position by calculating a pump cam position from the base circle portion of the first image;
A camshaft comprising: a window setting means for setting the window in an image of the camshaft; and an inspection means for inspecting the inside of the window for defects while rotating the camshaft to obtain an image of the pump cam surface. A pump cam surface inspection device is provided, which makes it possible to suitably inspect the pump cam surface even in the case of a camshaft that has been subjected to TIC hardening treatment.
第１図は本発明の一実施例のカムシャフトのポンプカム
面検査装置の構成模式図、第２図は第１の画像を得る状
態のカム位ｆ！！説明図、第３図は第１の画像の例示図
、第４図は第１の画像における明暗分布図、第５図はカ
ムシャフトを回転させてポンプカム面の画像を得る一つ
の状態のカム位置説明図、第６図は第５図に示す位置で
得られる画像とウィンドウの例示図、第７図は従来装置
における検査時のカム位置説明図、第８図は第７図に示
す状態で得られる画像の例示図、第９図は第８図のＸ軸
上の明暗分布図、第１０図は第８図に示す画像とウィン
ドウの関係を示す例示図、第１１図はＴＩＧ焼入れ処理
により「だれ」の発生したカムに対しての第７図相当図
、第１２図は同第８図相当図、第１３図は同第９図相当
図、第１４図は同第１０図相当図である。
〔符号の説明〕
■・・・カムシャフトのポンプカム面検査装置２・・・
シャフト保持手段
３・・・カメラ手段
４・・・処理手段
Ｓ・・・カムシャフト
■・・・インテークカム
■し・・・ベースサークル部
ｌ＃・・・ベースサークル部の端縁
Ｐ・・・ポンプカム
ＰＣ・・・ポンプカム面
Ｐｄ・・・ポンプカム面の端縁
Ｗ・・・ウィンドウ。
出願人 ダイハツ工業株式会社Fig. 1 is a schematic diagram of the configuration of a pump cam surface inspection device for a camshaft according to an embodiment of the present invention, and Fig. 2 shows the cam position f! in the state in which the first image is obtained. ! Explanatory diagram, Figure 3 is an example diagram of the first image, Figure 4 is a brightness distribution diagram in the first image, Figure 5 is the cam position in one state in which the image of the pump cam surface is obtained by rotating the camshaft. 6 is an illustration of the image and window obtained at the position shown in FIG. 5, FIG. 7 is an explanatory diagram of the cam position during inspection in the conventional device, and FIG. 8 is an illustration of the image obtained in the state shown in FIG. 7. 9 is a diagram showing the brightness distribution on the X axis of FIG. 8, FIG. 10 is an illustrative diagram showing the relationship between the image shown in FIG. 8 and the window, and FIG. 7 is a diagram corresponding to the cam in which the droop occurred, FIG. 12 is a diagram equivalent to Figure 8, FIG. 13 is a diagram equivalent to Figure 9, and Figure 14 is a diagram equivalent to Figure 10. . [Explanation of symbols] ■...Camshaft pump cam surface inspection device 2...
Shaft holding means 3...Camera means 4...Processing means S...Camshaft ■...Intake cam ■Base circle portion l#...Edge of base circle portion P... Pump cam PC...Pump cam surface Pd...Edge W of the pump cam surface...Window. Applicant Daihatsu Motor Co., Ltd.
Claims (1)
ム面の欠陥を検査するための装置であって、ポンプカム
およびポンプカムに近接するインテークカムまたはエキ
ゾーストカムのベースサークル部分を含む第１の画像を
得る第１の撮像手段と、第１の画像の前記ベースサーク
ル部分からポンプカム位置を算出してウインドウ位置を
決定するウインドウ位置決定手段と、第１の画像に前記
ウインドウを設定するウインドウ設定手段と、カムシャ
フトを回転させてポンプカム面の画像を得つつウインド
ウ内について欠陥の検査を行う検査手段とを具備してな
ることを特徴とするカムシャフトのポンプカム面検査装
置。1. A first imaging device for inspecting defects on a pump cam surface of a camshaft subjected to TIG hardening treatment, which obtains a first image including a pump cam and a base circle portion of an intake cam or an exhaust cam adjacent to the pump cam. means, window position determining means for determining a window position by calculating a pump cam position from the base circle portion of a first image, window setting means for setting the window in the first image, and rotating a camshaft. 1. A pump cam surface inspection device for a camshaft, comprising: inspection means for inspecting the inside of the window for defects while obtaining an image of the pump cam surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12787988A JPH0619332B2 (en) | 1988-05-25 | 1988-05-25 | Pump shaft cam surface inspection device for cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12787988A JPH0619332B2 (en) | 1988-05-25 | 1988-05-25 | Pump shaft cam surface inspection device for cam shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01297537A true JPH01297537A (en) | 1989-11-30 |
| JPH0619332B2 JPH0619332B2 (en) | 1994-03-16 |
Family
ID=14970899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12787988A Expired - Fee Related JPH0619332B2 (en) | 1988-05-25 | 1988-05-25 | Pump shaft cam surface inspection device for cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619332B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013202907A1 (en) * | 2013-02-22 | 2014-08-28 | Mahle International Gmbh | Testing device for testing camshaft of internal combustion engine of motor car, has measuring units arranged adjacent to each other along direction and simultaneously performing hardness and/or surface testing of individual cams of camshaft |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157610A (en) * | 2015-09-29 | 2015-12-16 | 哈尔滨东安发动机（集团）有限公司 | Optical cam curve measuring method |
-
1988
- 1988-05-25 JP JP12787988A patent/JPH0619332B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013202907A1 (en) * | 2013-02-22 | 2014-08-28 | Mahle International Gmbh | Testing device for testing camshaft of internal combustion engine of motor car, has measuring units arranged adjacent to each other along direction and simultaneously performing hardness and/or surface testing of individual cams of camshaft |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0619332B2 (en) | 1994-03-16 |
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| LAPS | Cancellation because of no payment of annual fees |