JP3182190U - Defect detection device for welds - Google Patents

Abstract

Disclosed is a defect detection device for a welded part which can detect a welding defect such as a void, a hole, or a blowhole such as a hole with an extremely inexpensive and robust structure, and which can be operated easily and accurately.
In a defect detection device for a welded part that observes the foaming state of the foaming liquid by spraying foaming liquid on the surface of the welded part and sealing the periphery of the foamed liquid, it is pressed around the welded part to be inspected. A pressure seal frame surrounding elastic cushioning material 205, 206, 207, 208 is provided at the opening edge to be transparent, and a transparent resin material or glass transparent plate is provided on the pressure seal frame so that the welded portion can be visually observed from the outside. , And a pressure gauge 500 and a pressure gauge 500 are connected to the pressure-contact seal frame itself or a transparent plate via a suction pipe 403, and high-pressure air for suction is supplied to the ejector 400. An apparatus for detecting a defect in a welded portion, comprising a pipe connected thereto.
[Selection] Figure 1

Description

  The present invention relates to a defect detection apparatus for a welded portion that detects air flow defects such as voids, holes, holes, and the like due to insufficient melting of the welded portion.

  Detection of defects such as blow holes such as voids, holes, holes, spatters, undercuts, burn-outs, welding jumps, beat deviations, length / width / area measurements using laser light Weld bead appearance inspection system using 3D images, radiation inspection (RT), ultrasonic inspection (UT), magnetic inspection (MT), penetration inspection (PT), electromagnetic induction inspection (ET), strain measurement (SM), etc. In general, inspection is performed using a nondestructive inspection method.

In addition, for detection of blowholes such as voids, holes, holes, etc., as a simple method, when helium gas is blown to the welded part and there are defects such as voids, holes, holes, etc. due to insufficient melting in the welded part, the defect There is also a gas leak detection device that detects the flow of helium gas through the helium detector.
In any case, the above-described conventional detection method requires an expensive detector, and the detection process involves a great amount of time and a complicated determination process.

  The present invention provides a defect detection device for a welded part that can detect a weld defect such as a blow hole such as a gap, a hole, and a hole with an extremely inexpensive and robust structure, with simple operation, and quickly and accurately. Is.

The “main technical configuration of the present invention that satisfies the above-mentioned problems is as follows (1).

(1) In a welded part defect detection device that sprays foaming liquid on the surface of the welded part and seals and covers this area and observes the foaming state of the foamable liquid, A pressure seal surrounding frame in which an elastic cushioning material is disposed at an opening edge to be provided, and a viewing window made of a transparent resin material or a glass transparent plate is provided on the pressure sealing seal frame so that a welded portion can be visually observed from the outside, An ejector is connected to the pressure seal frame itself or a transparent plate via a suction pipe and a pressure gauge is connected to the ejector, and a high-pressure air supply pipe for suction is connected to the ejector. Defect detection device.

According to the present invention, the defect detection device for a welded portion is configured to apply a foaming liquid to the surface of the welded portion by applying a foaming liquid on the surface of the welded portion, such as a void, a hole, or a hole due to a fusion defect of the welding rod at the welded portion. It is possible to detect the presence or absence of foaming of the foamable liquid by visualizing the foamed liquid accurately and easily quickly. In particular, since the foaming state is detected from the transparent sealing window, the accuracy of confirmation and detection is remarkably improved. In addition, the structure is extremely inexpensive and robust, and the handy operation is simple, so that welding defects such as voids, holes, holes, and blowholes can be detected quickly and accurately. Although it is desirable to reduce the pressure to 5 Pa or less, in actual inspection, a negative pressure with a low degree of vacuum that generates bubbles may be used.

It is a bird's-eye view which shows the layout of the defect part detection apparatus of T weld part W1 of Example 1. FIG. It is sectional explanatory drawing from arrow AA of FIG. It is a front bird's-eye view of the defect part detection apparatus of the T-type welding part W1 of Example 1. FIG. 3 is a bird's-eye view of the back surface of the defect detection device for the T-type weld W1 of Example 1. FIG. It is a bird's-eye view which shows the layout of the defect part detection apparatus of the Y-type welding part W2 of Example 2. FIG. It is a front bird's-eye view of the defect part detection apparatus of the Y-type welding part W2 of Example 2. FIG. It is a back bird's-eye view of the defect part detection apparatus of the Y-type welding part W2 of Example 2. FIG.

  The form for implementing this invention is demonstrated in detail by the Example shown in FIGS.

The defect detection device for a welded portion of the first embodiment is shown in FIGS. 1 to 4 and is used for inspecting a T-shaped corner welded portion that detects a T-shaped corner welded portion W1 where two steel materials S1 and S2 intersect at right angles. It is.
In FIG. 1 to FIG. 3, the defect detection device includes a pressure-contact seal frame 201 that forms the decompression chamber 100 in the enclosure frame, and a transparent plate 300 that forms viewing windows 301 and 302 on the observation side of the pressure-contact seal frame 201. And an ejector 400 and a pressure gauge 500 for decompressing the inside of the decompression chamber 100, and handles 601 and 602 for operation.

  The pressure-contact seal surrounding frame 201 is a rectangular frame having eyeglass-shaped viewing windows 301 and 302, has right and left isosceles triangular closing plates 202, and has an opening edge around the welded portion to be inspected. A channel 230 having a U-shaped cross-section as shown in FIG. 2 is arranged over the entire area of the opening edge of the pressure contact, and this channel 230 is continuously joined with non-breathable rubber, felt, and flexibility. The rear portions of elastic cushioning materials 205, 206, 207, 208, and 209 such as resin plates are fitted and held by adhesion.

The elastic cushioning material 205 presses the front end face thereof in parallel to the vertical surface S1 f of the steel material S1 above the T-shaped corner welded portion W1 with respect to the T-shaped corner welded portion W1. The horizontal surface S2f of the steel material S2 in front of the T-shaped corner weld W1 is pressed in parallel with the T-shaped corner weld W1.
The elastic cushioning material 207 arranged in the U-shaped channel 230 of both the closing plates 202 has a front end surface thereof on the vertical surface S1 f of the steel material S1 above the T-shaped corner welded portion W1 and a T-shaped corner welded portion. The elastic shock-absorbing material 208 is pressed against the horizontal surface S2 f of the steel material S2 in front of the T-shaped corner welded portion W1 at a right angle with respect to the T-shaped corner welded portion W1. Since the joint portion between the elastic cushioning material 207 and the elastic cushioning material 208 is in direct contact with the T-shaped corner welded portion W1, an R is attached according to the surface shape.

  The decompression chamber 100 includes a press-contact seal surrounding frame 201 main body, two right-angled isosceles triangular closing plates 202, a transparent plate 300 that forms viewing windows 301 and 302, and a T-shaped corner welded portion W1. The steel materials S1 and S2 are formed by the surfaces S1 f and S2 f.

  The observation windows 301 and 302 are made of a transparent plate 300 made of a transparent glass or a resin such as an acrylic plate, and the transparent plate 300 is attached to the outer side of the rectangular frame of the press-contact seal surrounding frame 201 with a bolt 303 via a packing 305. The nut 304 is secretly and closely arranged. Further, the transparent plate 300 and the packing 305 are detachably attached by bolts 303 and nuts 304 in order to quickly and easily perform replacement due to dirt cleaning or damage during use.

The ejector 400 includes a jet nozzle 402 that encloses the suction nozzle 401, a suction pipe 403 is connected to the suction nozzle 401, the suction pipe 403 is secretly connected to the transparent plate 300, and the jet nozzle 402 is connected via an opening / closing valve 406. The high-pressure air pipe 404 is connected, and the exhaust nozzle 405 is connected to the tip. Thus, the ejector 400 sucks the air in the decompression chamber 100 from the suction pipe 403 and dissipates it into the atmosphere by supplying the high-pressure air from the high-pressure air pipe 404, thereby bringing the decompression chamber 100 into a decompressed state of a predetermined value.
This reduced pressure state is confirmed by a pressure gauge 500 that is connected to the reduced pressure chamber 100 in communication connection.

  The defect detection device of this welded part applies or spreads foaming liquid such as soapy water on the surface of the T-shaped corner welded part W1, and then, around the corner welded part W1, as shown in FIG. Then, set in parallel and press with the handles 601 and 602, supply high pressure air to the ejector 400 to bring the inside of the decompression chamber 100 into a negative pressure state, and foam generation of foamable liquid from the surface of the welded part W1 to be inspected By checking the presence / absence of the state from the observation windows 301 and 302, the presence / absence of air flow defects such as voids, holes, holes and the like due to welding defects is detected in the inspection welded portion.

The defect detection device for a welded portion of the second embodiment is shown in FIGS. 5 to 7 and is a corner welded portion W2 in which the side surface S1, the side surface S2, the bottom surface, or the top surface S3 intersect at right angles with three steel materials of the left and right surfaces and the bottom surface. This is for inspection of a Y-shaped corner welded portion that detects
5 to 7, the defect detection apparatus includes a pressure seal seal frame 21 that forms a decompression chamber 10 in an enclosure frame, and an acrylic transparent plate that forms a viewing window 31 on the observation side of the pressure seal seal frame 21. 30, an ejector for connecting the suction pipe 43 in the decompression chamber 10 to decompress the pressure (not shown because it is the same as the first embodiment), a pressure gauge 50, and a handle 61 for operation.

The press-contact seal surrounding frame 21 is a rectangular frame having a viewing window 31, and is integrated by connecting the bottom side of a right-angled isosceles triangular closing plate 22 directly to the upper end portion.
Further, the press-contact seal surrounding frame 21 is provided with a channel-shaped channel 23 having a U-shaped cross section similar to 230 shown in FIG. 2 at both the left and right sides, the bottom, and all opening ends of the closing plate 22. The rear portions of elastic cushioning materials 25, 26, 27, 28, and 29 such as non-breathable rubber, felt, and a flexible resin plate are fitted into the channel 23 and are held by bonding.

The elastic shock-absorbing material 25 presses the front end face thereof in parallel with the vertical surface S1 f of the steel material S1 on the right side toward the vertical portion of the Y-shaped corner welded portion W2 with respect to the vertical portion of the Y-shaped corner welded portion W2, The elastic cushioning material 26 has its front end face parallel to the vertical surface of the Y-shaped corner welded portion W2 to the horizontal surface S2f of the left steel surface S2 vertical surface S2f toward the vertical portion of the Y-shaped corner welded portion W2. The elastic cushioning material 27 at the bottom part is in pressure contact with the horizontal plane S3 f of the steel material S3 across the left and right lateral parts of the Y-shaped corner welded part W2.
The elastic cushioning material 28 of the closing plate 22 has its front end surface perpendicular to the vertical surface S1 f of the left steel material S1 toward the vertical portion of the Y-shaped corner welded portion W2, and perpendicular to the vertical portion of the Y-shaped corner welded portion W2. The elastic cushioning material 29 has its front end face perpendicular to the vertical portion of the Y-shaped corner welded portion W2 on the surface S2f of the right steel material S2 with the front end face thereof facing the vertical portion of the Y-shaped corner welded portion W2. Press contact.

  The decompression chamber 10 includes a pressure seal frame 21, a transparent plate 30 that forms a closing plate 22 and a viewing window 31, and side steels S1 and S2 around the Y-shaped corner welded portion W2, and surfaces S1f and S2f and bottom steel. It is formed by the surface S3f of S3.

  The viewing window 31 is formed of a transparent plate 30 made of resin such as a transparent glass or an acrylic plate, and the transparent plate 30 is a bolt 33 nut 34 via a packing 35 on the outside of the rectangular frame of the press-contact seal surrounding frame 21. It is secretly arranged closely. Further, the transparent plate 30 and the packing 35 are easily and detachably attached by bolts 33 and nuts 34 in order to quickly and easily perform dirt cleaning during use and replacement due to damage or the like.

  The ejector has the same configuration as that of the first embodiment, and the structure and detailed description thereof are omitted.

  In this example, the defect detection device for the welded portion is sprayed with foaming liquid on the surface of the corner welded portion W2, and then set around the surface as shown in FIG. By supplying air to make the inside of the decompression chamber 10 into a negative pressure state, and confirming from the observation window 30 whether or not the foaming liquid bubbles are generated from the surface of the welded portion W2 to be inspected, a welding defect occurs in the welded portion to be inspected. It detects the presence or absence of air flow defects such as voids, holes and holes.

The present invention exhibits the above-described excellent operational effects. For this reason, since inspection of welded parts such as shipbuilding and steel buildings can be performed in real time, there is a great deal of contribution to various construction industries by realizing high efficiency of welding work.

W1: Corner welded portion 100: Decompression chamber W2: Corner welded portion 201: Pressure contact seal surrounding frame 202: Right-angled isosceles triangular closing plate 406: On-off valve 230: U-shaped channel S1: Side surface steel 300: Transparent plate S2: Side surface Steel material 301, 302: Viewing window S3: Bottom or top surface steel material 400: Ejector S1 f, S2 f, S3 f: Surface 500: Pressure gauge 10: Decompression chamber 601, 602: Handle 21: Pressure contact seal surrounding frame 205, 206: Elasticity Buffer material 23: U-shaped channel 207, 208: Elastic buffer material 22: Right-angled isosceles triangle closing plate 303: Bolt 30: Transparent plate 304: Nut 31: Viewing window 401: Suction nozzle 35: Packing 402: Jet nozzle 43 : Suction tube 403: Suction tube 50: Pressure gauge 404: High pressure air piping 61: Handle 405: Exhaust nozzles 25, 26, 27, 2 , 29 elastic cushioning material

Claims (1)

  In the welded part defect detection device that observes the foaming state of the foaming liquid by spraying the foaming liquid on the surface of the welded part and sealing the surrounding area, the opening edge that presses the circumference of the welded part to be inspected A pressure sealing seal frame in which an elastic cushioning material is arranged, and a pressure window made of a transparent resin material or glass transparent plate is provided on the pressure sealing seal frame so that a welded portion can be visually observed from the outside. A defect detection device for a welded part, comprising: an ejector connected to itself or a transparent plate via a suction pipe, and a pressure gauge connected to the ejector; and a high-pressure air supply pipe for suction connected to the ejector. .