JPH06323947A - Pinhole detector - Google Patents
Pinhole detectorInfo
- Publication number
- JPH06323947A JPH06323947A JP13683493A JP13683493A JPH06323947A JP H06323947 A JPH06323947 A JP H06323947A JP 13683493 A JP13683493 A JP 13683493A JP 13683493 A JP13683493 A JP 13683493A JP H06323947 A JPH06323947 A JP H06323947A
- Authority
- JP
- Japan
- Prior art keywords
- inspection
- pressure
- liquid
- pinhole
- inspected
- 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 59
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 230000003068 static effect Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 abstract description 2
- 230000002950 deficient Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、部品のピンホ−ルを検
出するピンホ−ル検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pinhole detecting device for detecting pinholes of parts.
【０００２】[0002]
【従来の技術】従来、部品のピンホ−ルを検出するピン
ホ−ル検出装置として図４に示した構成のエア−リ−ク
テスタがある。このエア−リ−クテスタによる被検査物
のピンホ−ル検出手段は、被検査物５１と同材質、同容
積を持ち、それに充満させた圧縮空気が漏れないように
形成されたマスタ−ワ−ク５２を設け、被検査物５１及
びマスタ−ワ−ク５２の両方に圧縮空気を同時に送り込
んで密閉状態としたあと被検査物５１及びマスタ−ワ−
ク５２の圧力差を測定し、圧力差が所定値以上であれ
ば、被検査物５１にピンホ−ルがあると判定するもので
ある。2. Description of the Related Art Conventionally, there is an air leak tester having a structure shown in FIG. 4 as a pinhole detecting device for detecting a pinhole of a component. The pinhole detecting means of the object to be inspected by the air leak tester has the same material and the same volume as the object to be inspected 51, and is formed so as not to leak the compressed air filled therein. 52 is provided, and compressed air is simultaneously sent to both the inspected object 51 and the master work 52 to make a sealed state, and then the inspected object 51 and the master work 52.
The pressure difference of the black 52 is measured, and if the pressure difference is equal to or more than a predetermined value, it is determined that the inspection object 51 has a pinhole.
【０００３】図４に示すように、被検査物５１はパッキ
ン５３を介して検査具５４にクランパで締め付けられる
一方、マスタ−ワ−ク５２は取付具５６に固定されてい
る。この状態で電磁弁５７を励磁すればテスト空気源か
らのテスト用空気がストップバルブ５８、エアフィルタ
５９を介したあとエアレギュレ−タ６０で圧力調整さ
れ、更に電磁弁５７を経由し、パイロット弁６１、精密
エア−フィルタ６２を通り、ストップバルブ６３、検査
具５４の空気配管接続口６４に至り、更に孔６５を通っ
て被検査物５１の空気室６６に充満するまで給入され
る。As shown in FIG. 4, the object 51 to be inspected is clamped to an inspection tool 54 via a packing 53 by a clamper, while the master work 52 is fixed to a mounting tool 56. When the solenoid valve 57 is excited in this state, the test air from the test air source is pressure-controlled by the air regulator 60 after passing through the stop valve 58 and the air filter 59, and further passes through the solenoid valve 57 and the pilot valve 61. , Through the precision air-filter 62, to the stop valve 63, to the air pipe connection port 64 of the inspection tool 54, and further through the hole 65 until the air chamber 66 of the inspection object 51 is filled.
【０００４】一方、電磁弁５７を通って分岐したテスト
用空気はパイロット弁６７を通り、精密エア−フィルタ
６８、ストップバルブ６９を経由し、マスタ−ワ−ク５
２の空気配管接続口７０から空気室７１に充満するまで
給入される。On the other hand, the test air branched through the electromagnetic valve 57 passes through the pilot valve 67, the precision air filter 68, the stop valve 69, and the master work 5
It is supplied from the second air pipe connection port 70 until the air chamber 71 is filled.
【０００５】被検査物５１とマスタ−ワ−ク５２の空気
室６６，７１にテスト用空気が充満され、同空気の圧力
振動が無くなり、安定圧力（静圧）になったあと、電磁
弁７２を励磁してそれぞれの空気流入口、流出口を遮断
する。この状態で被検査物５１から空気の漏れがあれ
ば、マスタ−ワ−ク５２の圧力を基準として比較する、
即ち差圧計７３で差圧力を計測し、その差圧力が所定値
を越えれば被検査物５１が不良品と判定する一方、その
差圧力が所定値以下であれば被検査物５１が良品である
と判定する。After the test object 51 and the air chambers 66 and 71 of the master work 52 are filled with the test air, the pressure vibration of the air is eliminated, and the stable pressure (static pressure) is reached. To excite each air inlet and outlet. In this state, if air is leaked from the inspection object 51, the pressure of the master work 52 is used as a reference for comparison.
That is, the differential pressure gauge 73 measures the differential pressure, and if the differential pressure exceeds a predetermined value, the inspection object 51 is determined to be defective, while if the differential pressure is less than the predetermined value, the inspection object 51 is a good product. To determine.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記従
来のエア−リ−クテスタによる被検査物のピンホ−ル検
出手段によれば、検査媒体に使用する空気圧力が低く、
被検査物５１に付着した小径の異物を排除できない現状
になっているため、被検査物５１のピンホ−ルに異物が
詰まっている場合には、ピンホ−ルがあってもそれを検
出できないという問題がある。それを解決するためには
空気圧力を上げてエア−リ−クテストを行う手段がある
が、異物がピンホ−ルから排出されるとき、圧縮空気が
急膨張し、爆発状態となるため非常に危険であり、製造
ラインに採用できないという問題があった。そこで本発
明では、検査媒体として高圧力の液体を静圧で使用する
ことによりピンホ−ルに詰まった異物を除去し、ピンホ
−ルの存在を検出できるようにすることを解決すべき課
題とするものである。However, according to the pinhole detecting means of the object to be inspected by the conventional air leak tester, the air pressure used for the inspection medium is low,
Since it is the current situation that a small-diameter foreign matter attached to the inspection object 51 cannot be eliminated, if the pinhole of the inspection object 51 is clogged with foreign matter, it cannot be detected even if there is a pinhole. There's a problem. In order to solve this, there is a means to increase the air pressure and perform an air leak test, but when foreign matter is discharged from the pinhole, the compressed air expands rapidly and becomes an explosion state, which is extremely dangerous. Therefore, there is a problem that it cannot be used in the production line. Therefore, in the present invention, it is an object to be solved that a foreign substance clogging the pinhole is removed by using a high-pressure liquid as a test medium at a static pressure so that the presence of the pinhole can be detected. It is a thing.
【０００７】[0007]
【課題を解決するための手段】上記課題解決のための技
術的手段は、ピンホ−ル検出装置を、被検査物に印加す
る液体を供給する検査液体供給部と、前記被検査物に印
加された前記液体を所定の検査圧力まで加圧する加圧部
と、その加圧部により前記液体が検査圧力まで加圧され
た静圧状態で所定時間経過後に前記検査圧力が規定値以
下に低下したとき前記被検査物にピンホ−ルがあること
を検知するピンホ−ル検知手段とを備えた構成にするこ
とである。The technical means for solving the above-mentioned problems include an inspection liquid supply unit for supplying a liquid for applying a pinhole detection device to an object to be inspected, and a liquid applied to the object to be inspected. And a pressurizing section for pressurizing the liquid to a predetermined inspection pressure, and when the inspection pressure drops below a specified value after a predetermined time in a static pressure state in which the liquid is pressurized to the inspection pressure by the pressurizing section. And a pinhole detecting means for detecting that the object to be inspected has a pinhole.
【０００８】[0008]
【作用】上記構成のピンホ−ル検出装置によれば、被検
査物に対して検査液体供給部から液体が供給され、加圧
部がその液体を所定の検査圧力まで加圧して静圧状態に
したあと所定時間経過したとき、ピンホ−ル検知手段は
検査圧力が規定値以下に低下したとき被検査物にピンホ
−ルがあることを検知する。According to the pinhole detecting device having the above-described structure, the liquid to be inspected is supplied from the inspection liquid supply unit, and the pressurizing unit pressurizes the liquid to a predetermined inspection pressure to bring it into a static pressure state. After a predetermined time has passed, the pinhole detecting means detects that the object to be inspected has a pinhole when the inspection pressure falls below a specified value.
【０００９】[0009]
【実施例】次に、本発明の一実施例を図１を参照しなが
ら説明する。図１はピンホ−ル検出装置の全体的な構成
を示した側面図で、図２は平面図、図３は正面図であ
る。図に示すように、検査具１はベ−ス２に取り付けら
れており、被検査物Ｗはパッキン３を介して検査具１に
密着され、検査媒体の液体を充填する空間が作られる。
上記ベ−ス２には被検査物Ｗを検査具１に締め付けるた
めのクランパ４が取り付けられている。更に、検査具１
には高圧の液体圧力を発生させるピストン５が内装され
ている。尚、高圧の液体圧力は、検査室６が密閉された
状態で、シリンダ７のピストンロッド前進により、その
先端に装着されたピストン５の前進により発生する。一
方、前記ベ−ス２は、検査具１とクランパ４を載置し、
それを被検査物Ｗに接近させたり、離反させたりするも
のである。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a side view showing the overall configuration of the pinhole detection device, FIG. 2 is a plan view, and FIG. 3 is a front view. As shown in the figure, the inspection tool 1 is attached to the base 2, and the inspection object W is brought into close contact with the inspection tool 1 through the packing 3 to form a space for filling the liquid of the inspection medium.
A clamper 4 for fastening the inspection object W to the inspection tool 1 is attached to the base 2. Furthermore, inspection tool 1
A piston 5 for generating a high-pressure liquid pressure is installed inside. It should be noted that the high-pressure liquid pressure is generated by the advance of the piston rod of the cylinder 7 and the advance of the piston 5 attached to the tip of the cylinder 7 while the inspection chamber 6 is sealed. On the other hand, the base 2 mounts the inspection tool 1 and the clamper 4,
The object W is moved toward or away from the object W to be inspected.
【００１０】液体を検査媒体として供給する流量供給源
８が設けられており、その流量供給源８には、供給液体
中の異物除去のためフィルタ９が接続されている。その
フィルタ９には、検査液体の供給、停止を行う電磁弁１
０が接続されている。電磁弁１０が開弁制御された状態
で供給液体の圧力計測のために目視用ゲ−ジ１１が設け
られており、更に電気的検知のための圧力スイッチ１２
が設けられている。A flow rate supply source 8 for supplying a liquid as an inspection medium is provided, and a filter 9 is connected to the flow rate supply source 8 for removing foreign matters in the supply liquid. The filter 9 has a solenoid valve 1 for supplying and stopping the inspection liquid.
0 is connected. A visual gauge 11 is provided for measuring the pressure of the supplied liquid while the solenoid valve 10 is controlled to open, and a pressure switch 12 for electrical detection is further provided.
Is provided.
【００１１】また、供給液体の高圧発生時の逆流を防止
するためチェックバルブ１３が設けられており、その高
圧計測用として圧力計１４と圧力スイッチ１５が設けら
れている。更に検査具１の出口配管に排出電磁弁１６を
接続し、検査具出口管路の開閉をするように構成されて
いる。A check valve 13 is provided to prevent backflow of the supplied liquid when a high pressure is generated, and a pressure gauge 14 and a pressure switch 15 are provided for measuring the high pressure. Further, a discharge solenoid valve 16 is connected to the outlet pipe of the inspection tool 1 to open and close the inspection tool outlet pipe line.
【００１２】次に、上記構成のピンホ−ル検出装置の作
用を説明する。ベ−ス前進後退シリンダ２Ａを前進させ
てベ−ス２を前進させ、被検査物Ｗに検査具１を接近さ
せた状態でクランパ４を作動させ、被検査物Ｗを検査具
１に締め付ける。この状態で電磁弁１０を励磁して開弁
し、被検査物Ｗの検査室６空間に前記検査液体を流入さ
せる。その際、検査液体は、検査具１の配管接続口１７
から孔１８を通って被検査物Ｗの検査室６空間に入り、
その空間にある空気を巻き込み押し出しながら、孔１９
や孔２０を経由して検査具１の配管接続口２１に至る。
このとき排出電磁弁１６を励磁することで空気混入状態
の液体が排出される。尚、電磁弁１０と排出電磁弁１６
は、最初に同時励磁したほうが空気排出が迅速となる。Next, the operation of the pinhole detecting device having the above construction will be described. The base advance / retract cylinder 2A is advanced to advance the base 2, and the clamper 4 is operated in a state where the inspection tool 1 is brought close to the inspection object W, and the inspection object W is fastened to the inspection tool 1. In this state, the electromagnetic valve 10 is excited to open the valve, and the inspection liquid is caused to flow into the space of the inspection chamber 6 of the inspection object W. At that time, the inspection liquid is the pipe connection port 17 of the inspection tool 1.
Through the hole 18 into the inspection room 6 space of the inspection object W,
The air in the space is pushed in and pushed out while the hole 19
It reaches the pipe connection port 21 of the inspection tool 1 through the hole 20.
At this time, by exciting the discharge solenoid valve 16, the liquid in the aerated state is discharged. The solenoid valve 10 and the discharge solenoid valve 16
The faster the air is exhausted, the more simultaneous excitation occurs.
【００１３】また、高圧を発生させるためのピストン５
の前方空間２２にある空気は、その室内の液体流れが乱
れるので完全に排出されずに残ってしまう。そこで、液
体流通状態で、ピストン５を約３ｍ／ｍｉｎのゆっくり
した速度で前進、後退を１往復させて空気を排出させ
る。この作動後に、液体の流通を遮断するため電磁弁１
０と排出電磁弁１６を同時に非励磁状態にする。続い
て、高圧発生のためピストン５をゆっくり前進させて検
査室６の圧力を検査圧力まで上昇させる。この過程で被
検査物Ｗにピンホ−ル内異物がある場合は、その異物は
高圧の液体力で排出され、ピンホ−ルが導通状態とな
り、圧力降下が起こり、ピストン５は前進限まで進み、
被検査物Ｗは不良品として判定される。Also, a piston 5 for generating a high pressure
The air in the space 22 in front of is not completely discharged and remains because the liquid flow in the chamber is disturbed. Therefore, in the liquid circulation state, the piston 5 is moved forward and backward once at a slow speed of about 3 m / min to discharge air. After this operation, the solenoid valve 1 is used to shut off the flow of liquid.
0 and the discharge solenoid valve 16 are simultaneously deenergized. Then, the piston 5 is slowly advanced to generate a high pressure, and the pressure in the inspection chamber 6 is increased to the inspection pressure. In this process, if there is a foreign substance in the pinhole on the object W to be inspected, the foreign substance is discharged by the high-pressure liquid force, the pinhole becomes conductive, a pressure drop occurs, and the piston 5 advances to the forward limit.
The inspection object W is determined as a defective product.
【００１４】一方、被検査物Ｗが良品であれば高圧とな
り、この圧力を圧力スイッチ１５で検出したら、ピスト
ン５の作動をその場で停止させるため、シリンダ７をそ
の場で停止保持させておく。この状態で検査室６は高圧
の静圧が確保できたことになる。即ち、所定の検査時間
経過後に圧力降下が規定値以下であれば被検査物Ｗは良
品と判定し、圧力降下が規定値以上であれば不良品と判
定する。On the other hand, if the object W to be inspected is a non-defective product, the pressure becomes high, and when this pressure is detected by the pressure switch 15, the operation of the piston 5 is stopped on the spot, so that the cylinder 7 is stopped and held on the spot. . In this state, the inspection chamber 6 can secure a high static pressure. That is, if the pressure drop is equal to or less than the specified value after the lapse of a predetermined inspection time, the inspected object W is determined to be a good product, and if the pressure drop is equal to or more than the specified value, it is determined to be a defective product.
【００１５】[0015]
【発明の効果】以上のように本発明によれば、被検査物
のピンホ−ルを検出するために、静圧の高圧液体を媒体
として使用し、その洩れによる圧力の降下の有無を確認
することでピンホ−ルを検出できるようにしたため、例
え、ピンホ−ルに異物が詰まっていても、その異物を除
去し、不良品として正しい判定ができるという効果があ
る。尚、実施例の効果として、従来は実車での市場クレ
−ムとなっていた異物詰まりピンホ−ルを未然に発見す
ることができる。As described above, according to the present invention, in order to detect the pinhole of the object to be inspected, a high-pressure liquid of static pressure is used as a medium, and it is confirmed whether or not the pressure drops due to the leakage. Thus, the pinhole can be detected, so that even if the pinhole is clogged with foreign matter, the foreign matter can be removed and a correct determination can be made as a defective product. As an effect of the embodiment, it is possible to find a pinhole with a foreign substance clogged, which has been a market crame in an actual vehicle.
【図１】本発明の一実施例の全体的な構成を示した側面
図及び油圧回路図である。FIG. 1 is a side view and a hydraulic circuit diagram showing an overall configuration of an embodiment of the present invention.
【図２】図１の平面図である。FIG. 2 is a plan view of FIG.
【図３】図１の正面図である。FIG. 3 is a front view of FIG.
【図４】従来のピンホ−ル検出装置の全体的な構成を示
した側面図である。FIG. 4 is a side view showing the overall configuration of a conventional pinhole detection device.
１ 検査具 ２ ベ−ス ３ パッキン ４ クランパ ５ ピストン ６ 検査室 ７ シリンダ ８ 液体供給源 ９ フィルタ １０ 電磁弁 １１ 目視用ゲ−ジ １２ 圧力スイッチ １３ チェックバルブ １４ 圧力計 １５ 圧力スイッチ １６ 排出電磁弁 １７ 配管接続口（入口） １８ 孔（液体通路） １９ 孔（液体通路） ２０ 孔（液体通路） ２１ 配管接続口（出口） ２２ 空間（ピストン前方） 1 Inspection Tool 2 Base 3 Packing 4 Clamper 5 Piston 6 Inspection Chamber 7 Cylinder 8 Liquid Supply Source 9 Filter 10 Solenoid Valve 11 Visual Gauge 12 Pressure Switch 13 Check Valve 14 Pressure Gauge 15 Pressure Switch 16 Discharge Solenoid Valve 17 Pipe connection port (inlet) 18 Hole (liquid passage) 19 Hole (liquid passage) 20 Hole (liquid passage) 21 Pipe connection port (outlet) 22 Space (in front of piston)
Claims (1)
液体供給部と、前記被検査物に印加された前記液体を所
定の検査圧力まで加圧する加圧部と、その加圧部により
前記液体が前記検査圧力まで加圧された静圧状態で所定
時間経過したあとに前記検査圧力が規定値以下に低下し
たとき前記被検査物にピンホ−ルがあることを検知する
ピンホ−ル検知手段とを備えたことを特徴とするピンホ
−ル検出装置。1. An inspection liquid supply unit for supplying a liquid to be applied to an object to be inspected, a pressurizing unit for pressurizing the liquid applied to the object to be inspected to a predetermined inspection pressure, and the pressurizing unit for applying the liquid. Pinhole detecting means for detecting the presence of a pinhole in the object to be inspected when the inspection pressure drops below a specified value after a predetermined time has passed in a static pressure state where the liquid is pressurized to the inspection pressure And a pinhole detecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05136834A JP3113960B2 (en) | 1993-05-14 | 1993-05-14 | Pinhole detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05136834A JP3113960B2 (en) | 1993-05-14 | 1993-05-14 | Pinhole detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06323947A true JPH06323947A (en) | 1994-11-25 |
| JP3113960B2 JP3113960B2 (en) | 2000-12-04 |
Family
ID=15184600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05136834A Expired - Lifetime JP3113960B2 (en) | 1993-05-14 | 1993-05-14 | Pinhole detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3113960B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000016257A (en) | 1997-04-22 | 2000-03-25 | 모리시타 요이치 | Liquid crystal display with image reading function, image reading method and manufacturing method |
-
1993
- 1993-05-14 JP JP05136834A patent/JP3113960B2/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| JP3113960B2 (en) | 2000-12-04 |
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