JPS589365B2 - How to measure weld groove gap - Google Patents
How to measure weld groove gapInfo
- Publication number
- JPS589365B2 JPS589365B2 JP960876A JP960876A JPS589365B2 JP S589365 B2 JPS589365 B2 JP S589365B2 JP 960876 A JP960876 A JP 960876A JP 960876 A JP960876 A JP 960876A JP S589365 B2 JPS589365 B2 JP S589365B2
- Authority
- JP
- Japan
- Prior art keywords
- groove
- measuring
- groove gap
- probe
- gap
- 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
Links
- 239000000523 sample Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011326 mechanical measurement Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
Landscapes
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Description
【発明の詳細な説明】
この発明は超音波検査の斜角探傷法の原理を利用した、
溶接開先ギャップの測定方法に関する。[Detailed Description of the Invention] This invention utilizes the principle of the angle angle flaw detection method of ultrasonic inspection.
This article relates to a method for measuring a weld groove gap.
溶接開先の状況に応じて溶接条件を調節する際の一つの
重要な作業として、開先ギャップの測定を挙げることが
できる。One important task when adjusting welding conditions according to the condition of the welding groove is measuring the groove gap.
この測定方法には、開先部に直接触子などを接触させる
機械的測定方法と、開先部に光を当てて反射光や透過光
を測定する光学的測定方法、とが知られている。Two known measurement methods are known: a mechanical measurement method in which a probe or the like is brought into direct contact with the groove, and an optical measurement method in which light is applied to the groove and the reflected light and transmitted light are measured. .
しかし、前者の機械的方法には触子に無理な力が付加さ
れると破損する恐れが多分にあるし、また後者の光学的
方法にしても、たとえば反射光を用いるときは十分なコ
ントラストを得るため開先部にペンキを塗るなどの前処
理を必要とすること、また透過光を用いるときは溶接鋼
板の表裏両面に測定装置を設置せねばならず、裏当材や
仮付などがあれば使用できないこと、などの問題点を拘
えている。However, the former mechanical method has a high risk of being damaged if excessive force is applied to the probe, and the latter optical method does not provide sufficient contrast when using reflected light, for example. In order to obtain the desired results, pretreatment such as painting the groove is required, and when using transmitted light, measuring devices must be installed on both the front and back of the welded steel plate, and there is no need for backing material or tacking. However, there are problems such as the fact that it cannot be used if the
この発明は上記の問題点を解消した溶接開先ギャップの
測定方法を提供するもので、溶接開先をまたいで片側に
２個づつ合計４個の斜角探触子を一定長さの連結金具に
固定して、それぞれの斜角探触子から発射する超音波が
開先面に到達する水平距離と、板厚方向の到達する距離
を測定し、演算によって開先形状を補正しながら開先ギ
ャップを測定することを特徴とする。This invention provides a method for measuring a welding groove gap that solves the above problems.The present invention provides a method for measuring a welding groove gap that straddles the welding groove and connects a total of four bevel probes, two on each side, to a fixed length connecting metal fitting. The horizontal distance that the ultrasonic waves emitted from each bevel probe reach the groove surface and the distance that the ultrasonic waves reach in the plate thickness direction are measured, and the groove shape is corrected using calculations. It is characterized by measuring gaps.
以下、図面を参照しながらこの発明を詳細に説明する。Hereinafter, the present invention will be explained in detail with reference to the drawings.
第１図において、溶接鋼板１１と１２の表面に開先ギャ
ップＧをまたぐ形で、ペアの斜角探触子が、たとえば４
個のタイヤ探触子１，２，３，４が接触している。In FIG. 1, a pair of bevel probes, for example, 4
The tire probes 1, 2, 3, and 4 are in contact with each other.
これらのタイヤ探触子１〜４はいづれも支持金具５〜８
を介して連結金具９に支冫えられ、この連結金具９が溶
接台車１０に連結されている。These tire probes 1 to 4 are all supported by support fittings 5 to 8.
The connecting fitting 9 is connected to a welding cart 10 via a connecting fitting 9.
一方、前記のタイヤ探触子１〜４には第２図に示す如く
、測定装置１３〜１６を介して演算回路１７が接続され
、信号処理回路を形成している。On the other hand, as shown in FIG. 2, an arithmetic circuit 17 is connected to the tire probes 1-4 through measuring devices 13-16, forming a signal processing circuit.
５すなわち、測定装置１３〜１６はタイヤ探触子１〜４
に対しておよびそこから超音波を送受し、タイヤ探触子
一鋼板裏面−開先面と超音波の通過する長さを測定する
ためのもの、また演算回路１７は、タイヤ探触子１〜４
で測定した超音波通過長さから開先ギャップＧを計算し
、その計算値に応じて出力信号を出すためのものである
。5 That is, the measuring devices 13 to 16 are the tire probes 1 to 4.
The arithmetic circuit 17 transmits and receives ultrasonic waves to and from the tire probe, and measures the length of the ultrasonic wave passing between the back surface of the steel plate and the groove surface. 4
This is to calculate the groove gap G from the ultrasonic passage length measured in , and output an output signal according to the calculated value.
このような装置構成において開先ギャップＧを測定する
には次のようにする。In order to measure the groove gap G in such an apparatus configuration, the following procedure is performed.
タイヤ探触子１〜４の信号は第３図に示すよう５になる
が、各探触子の送信パルスと受信パルスとの間の時間な
Ｔｉとすれば、まず鋼板内の超音波通路長Ａｉは、下記
（１）式により算出される。The signals of the tire probes 1 to 4 are 5 as shown in Fig. 3, but if Ti is the time between the transmitted pulse and the received pulse of each probe, then the ultrasonic path length in the steel plate is Ai is calculated by the following formula (1).
Ａｉ＝Ｖ／２（Ｔｉ−２Ｔｏ）・・・・・・・（１）た
ゞし、Ｖ：鋼板内の音速
Ｔｏ：探触子内の超音波通過時間
そして、タイヤ探触子２，３から開先面でそれぞれ反射
される点までの超音波進行路の水平距離をｌ２およびｌ
３、上記反射点と開先面下端との間の水平距離をｃおよ
びｄ、タイヤ探触子２，３間の設定距離をＬ１、上記の
反射点と開先面上端との間の垂直距離をｔ２およびｔ３
、とするならば、開先ギャップＧは次の（２）式によっ
て算出することができる。Ai=V/2(Ti-2To)...(1) Where, V: Speed of sound inside the steel plate To: Ultrasonic wave passage time inside the probe And tire probes 2 and 3 The horizontal distance of the ultrasonic traveling path from
3. The horizontal distance between the above reflection point and the bottom edge of the groove surface is c and d, the set distance between the tire probes 2 and 3 is L1, and the vertical distance between the above reflection point and the top edge of the groove surface. t2 and t3
, the groove gap G can be calculated using the following equation (2).
Ｇ＝Ｌ１−（ｌ２＋ｌ３＋ｃ＋ｄ）・・・・・・・（２
）ここで、ｌ２とｌ３、およびｔ２とｔ３については、
鋼板内の超音波入射角なθ、鋼板厚さをｔとすれば、下
記の（３）〜（１２）式によって算出するこができる。G=L1-(l2+l3+c+d)...(2
) Here, for l2 and l3 and t2 and t3,
If θ is the ultrasonic incident angle within the steel plate and t is the thickness of the steel plate, it can be calculated using the following equations (3) to (12).
ｌ１＝Ａ１ｃｏｓθ ・・・・・・・・・・・・・・
・ （３）ｌ２＝Ａ２ｃｏｓθ ・・・・・・・・・
・・・・・・ （４）ｇ＝ｌ２−（ｌ１−Ｌ）／ｔ２−
ｔ１×（ｔ−ｔ２）・−・（５）ｔ１＝２ｔ−Ａ１ｓｉ
ｎθ・・・・・・・・・・・・ （６）ｔ２＝２ｔ−Ａ
２ｓｉｎθ・・・・・・・・・・・・ （７）同様にし
てタイヤ探触子３，４については、ｌ３＝Ａ３ｃｏｓθ
・・・・・・・・・・・・ （８）ｌ４＝Ａ４ｃ
ｏｓθ ・・・・・・・・・・・・ （９）ｄ＝ｌ
３−（ｌ４−Ｌ３）／ｔ３−ｔ４×（ｔ−ｔ３）・・・
（１０）ｔ３＝２ｔ−Ａ３ａｉｎθ （１１）ｔ
３＝２ｔ−Ａ４ｓｉｎθ・・・・・・・・・・・・（１
２）以上、（１）〜（１２）式に示した計算を、演算回
路１７によって行なうものである
この発明は以上に述べた如く、溶接鋼板等の溶接部材の
表面に超音波の斜角探触子が発射する超音波が開先面に
到達する水平距離と板厚方向の到達距離を測定し演算に
よって開先角を補正しながら開先ギャップを測定するも
のであるから、開先部に触子を接触させる機械的測定方
法と違って、機器破損の心配が解消され、また光学的測
定方法と異なって開先部に施す前処理が不用となり、裏
当材や仮付の有る無しにかかわらず開先ギャップを正確
に測定することができるようになった。l1=A1cosθ・・・・・・・・・・・・・・・
・ (3) l2=A2cosθ ・・・・・・・・・
...... (4) g=l2-(l1-L)/t2-
t1×(t-t2)・-・(5) t1=2t-A1si
nθ・・・・・・・・・ (6) t2=2t−A
2 sin θ・・・・・・・・・・・・ (7) Similarly, for tire probes 3 and 4, l3=A3 cos θ
・・・・・・・・・・・・ (8)l4=A4c
osθ ・・・・・・・・・・・・ (9) d=l
3-(l4-L3)/t3-t4×(t-t3)...
(10) t3=2t-A3ainθ (11) t
3=2t-A4sinθ・・・・・・・・・(1
2) The calculations shown in equations (1) to (12) above are performed by the arithmetic circuit 17.As described above, this invention uses ultrasonic angle detection on the surface of welded parts such as welded steel plates. The method measures the horizontal distance that the ultrasonic waves emitted by the probe reach the groove surface and the distance traveled in the plate thickness direction, and uses calculations to correct the groove angle and measure the groove gap. Unlike mechanical measurement methods that involve contacting a probe, there is no need to worry about equipment damage, and unlike optical measurement methods, there is no need for pretreatment of the groove, and there is no need for backing material or tacking. It is now possible to accurately measure the groove gap regardless of the situation.
したがって鋼板を筆頭に各種金属部材の溶接開先ギャッ
プの測定を行なうに際し、この発明は工業的に重要な測
定方法を提供するものである。Therefore, the present invention provides an industrially important measuring method when measuring the weld groove gap of various metal members, including steel plates.
第１図はこの発明の一実施例で採用する溶接開先ギャッ
プの測定要領を示す説明図。
第２図は前記の測定に用いられる信号処理回路を示して
おり、また斜角探触子による信号図を第３図に示した。
１，２，３，４・・・タイヤ探触子、５，６，７，８・
・・支持金具、８・・・連結金具、１０・・・溶接台車
、１１，１２・・・溶接鋼板、１３，１４，１５，１６
・・・測長装置、１７・・・演算回路、Ｇ・・・開先ギ
ャップ、θ・・・超音波入射角、ｔ・・・鋼板厚さ。FIG. 1 is an explanatory diagram showing a procedure for measuring a weld groove gap employed in an embodiment of the present invention. FIG. 2 shows a signal processing circuit used for the above measurement, and FIG. 3 shows a signal diagram using an angle probe. 1, 2, 3, 4... tire probe, 5, 6, 7, 8...
... Supporting metal fittings, 8... Connecting metal fittings, 10... Welding trolley, 11, 12... Welding steel plates, 13, 14, 15, 16
...Length measuring device, 17... Arithmetic circuit, G... Groove gap, θ... Ultrasonic incidence angle, t... Steel plate thickness.
Claims (1)
探触子を一定長さの連結金具に固定して、それぞれの斜
角探触子から発射する超音波が開先面に到達する水平距
離と、板厚方向の到達する距離を測定し、演算によって
開先形状を補正しながら開先ギャップを測定することを
特徴とする溶接開先ギャップの測定方法。1 A total of four bevel probes, two on each side, are fixed across the welding groove to a fixed length connecting fitting, and the ultrasonic waves emitted from each bevel probe are applied to the groove surface. A method for measuring a welding groove gap, characterized by measuring the horizontal distance reached and the distance reached in the plate thickness direction, and measuring the groove gap while correcting the groove shape by calculation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP960876A JPS589365B2 (en) | 1976-01-31 | 1976-01-31 | How to measure weld groove gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP960876A JPS589365B2 (en) | 1976-01-31 | 1976-01-31 | How to measure weld groove gap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5292742A JPS5292742A (en) | 1977-08-04 |
| JPS589365B2 true JPS589365B2 (en) | 1983-02-21 |
Family
ID=11725002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP960876A Expired JPS589365B2 (en) | 1976-01-31 | 1976-01-31 | How to measure weld groove gap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS589365B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5568011U (en) * | 1978-10-31 | 1980-05-10 | ||
| JPS5838722B2 (en) * | 1978-10-31 | 1983-08-25 | 大阪瓦斯株式会社 | Piping penetration length measurement method |
| JPS5568012U (en) * | 1978-10-31 | 1980-05-10 |
-
1976
- 1976-01-31 JP JP960876A patent/JPS589365B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5292742A (en) | 1977-08-04 |
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