KR20000003652A - Apparatus for automatically testing ultrasonic wave to test a weld bead - Google Patents

Abstract

PURPOSE: An automatic ultrasonic wave test apparatus is provided, which can move itself to be no necessity for establishing a rail for moving a scanner, grasp a shape with third dimensional defect by only one scan which a plurality of probes simultaneously scan a welding portion, and provide a permanent record for maintenance and management later. CONSTITUTION: An automatic ultrasonic wave test apparatus comprises:a digital ultrasonic wave probe (370) for using a micro-Tomoscan; a transit device (310) for performing a moving operation according to a power and a drive signal of a certain motor drive device (380); probes to be attached to each probe holder for moving according to the weld bead by driving the transit device (310) to perform the ultrasonic probe; a motor driving device (380) for providing the motor driving signal and the driving power to the transit device (310); and a computer system (390) for receiving a signal to the result of ultrasonic probe through the digital ultrasonic probe (370) through the micro-Tomoscan (370) to analyze and for storing a certain data. Accordingly, the defect to the weld bead of a construction object with an iron frames can to be accurately probed and stability to a construction object with an iron frames can to be improved.

Description

Automatic ultrasonic test unit for testing weld beads

The present invention relates to a device for inspecting various defects present in the weld bead of the steel structure, in particular for welding bead inspection for inspecting the various defects present in the weld bead by using ultrasonic waves while traveling along the inspection target weld bead. It relates to an automatic ultrasonic inspection device.

1 is an external view of weld beads 111 and 112 (Weld Beads) shown in the box-shaped steel structure 110. FIG. 1A is a plan view and FIG. 1B is a side view.

The box-shaped steel structure 110 is usually made of a vertical member and a horizontal member connected by welding. At this time, since the welding of the box-shaped steel structure 110 is made along the edge portion, the weld bead of the corner weld portion occurs in a straight line along the edge portion. That is, as shown in FIG. 1A, the upper left weld bead 111 and the upper right weld bead 112 are linearly formed on the upper surface of the box-shaped steel structure 110, and the lower weld beads 113 and 114 are also straight on the lower surface. It occurs in shape.

FIG. 2 is a detailed configuration diagram of the upper left welding bead 111 of the box-shaped steel structure 110 shown in FIG. 1, in which welding beads are generally infiltrated into the horizontal member at an angle of about 45 ⁰ with respect to the vertical member. In addition, FIG. 2 shows an example of the dimensions of the box-shaped steel structure used in the Yeongjong Bridge for the convenience of description.

The welding beads may have welding defects such as pin holes or blow holes caused by the mixed gas, and shrinkage holes caused by shrinkage during solidification. At this time, the pin hole is a pore having a diameter of 2-3 mm or less, and a plurality of pin holes exist in a state in which a plurality of blow holes are formed in the weld metal. It is a hole in the mold.

Destructive testing and non-destructive testing are used to inspect these weld defects. Destructive testing is a method of testing by cutting or bending an inspection part, and non-destructive testing is a welded object. How to inspect without destroying.

Meanwhile, a new airport highway is being constructed in our country that will connect Seoul with the new airport, which intends to become the center of Northeast Asian air traffic in the 21st century. The Yeongjong Bridge, including midnight suspension bridge, will be 4,420m long and will be the core of the new airport highway.

The Yeongjong Bridge is composed of a self-supporting suspension bridge (450m), a trust bridge and a steel bridge.The double suspension bridge and the truss bridge are double-deck bridges, which are used in combination with bridges and railroads, and use high-strength high-strength steel. Therefore, fatigue problems due to welding defects are important. In particular, the size of the blow hole allowed at the edge of Yeongjong Bridge is 3mm and very strict regulations are applied.

In this case, butt welds can be effectively used for the radiographic inspection, but the corner welds used for the assembly of the reinforcement type and the main members of the truss bridge (upper current, lower current, sand, etc.) can be used instead of the radiographic inspection. Nondestructive testing should be performed using ultrasonography.

However, when the ultrasound is performed using a manual ultrasound, major welding defects may not be found, and it may be difficult to secure a permanent record, depending on the attention and skill of the examiner. In particular, the truss of the Yeongjong Bridge is thick and difficult to determine due to root defects and disturbance echoes generated at the edge welds, and depends on the skill of the inspector.

Therefore, in order to overcome the shortcomings of the manual ultrasound test and to accurately identify the defects in the weld bead, a device for an ultrasound test using a computer, that is, an automatic ultrasound test, is required.

As a device for such an automatic ultrasonic inspection, a micro-tomoscan ( μ -Tomoscan)

Micro-tomoscan is a kind of digital ultrasonic flaw detector, and it has various types of color such as time of flight diffraction (TOFD) screen, A-screen (time-amplification), B-screen (cross section), C-screen (flat display), etc. It is possible to improve the identification and precision of defects through image processing, to use 1 to 8 channels, and to be used conveniently in the Windows-NT environment.

At present, there is no example in which the automatic ultrasonic inspection device is applied and it has not been developed. In addition, the automatic ultrasonic inspection apparatus used conventionally checks the state of a weld bead while the scanner which installed the ultrasonic probe moves on the predetermined rail provided around the weld bead.

However, there is an inconvenience in that the rail to be moved by the scanner must be installed and the welding bead should be scanned two or more times in order to detect various defects.

Accordingly, the present invention has been devised to solve the above inconvenience, without having to install the rail for the scanner to move itself can move by itself, a plurality of transducers at the same time to scan the weld at the same time only one injection 3 It is an object of the present invention to provide a device capable of identifying dimensional defect shapes and also providing a permanent record for future maintenance, that is, an automatic ultrasonic inspection device for welding bead inspection.

In order to achieve the above object, the automatic ultrasonic inspection apparatus for the inspection of the weld bead according to the present invention for inspecting the lower portion of the welded portion is equipped with a predetermined number of probes for inspecting the lower portion of the welded portion to inspect the lower portion of the weld bead to be inspected. The probe holder, the probe holder for all-weld part inspection in which a predetermined number of all-weld part inspection probes for inspecting the whole weld bead are mounted, and the predetermined penetration amount inspection probe for inspecting the penetration amount of the weld bead, A transducer mounting table for supporting a penetration holder for a penetration amount inspection to be mounted by a predetermined number; A traveling device which mounts the probe mounting table and moves along the welding bead by a predetermined motor driving signal received from a predetermined motor driving device; And a computer system for controlling the traveling device, receiving an ultrasonic test signal inspected by each transducer through a micro-tomoscane, analyzing a state of the welding bead, and outputting it in a predetermined format.

At this time, the transducer mounting table is a first guide rail and a second guide rail which is installed at a predetermined distance in the front, rear; A fixing bracket positioned between the right end and the left end of the first guide rail and the second guide rail to maintain a distance between the guide rails; A guide rail fastening member positioned inside the fixing bracket to fix respective ends of the first guide rail and the second guide rail; A probe holder for pre-weld part inspection, which is located in a space between the first guide rail and the second guide rail and is connected to and installed through a predetermined connection member and a guide member to move along the first guide rail; A probe holder for welding the lower part of the welding part, which is positioned in front of the second guide rail and is connected through a predetermined connection member and a guide member to be moved along the second guide rail; A penetration holder for placement inspection, which is positioned below the outer fixing bracket of the fixing bracket and is in close contact with the side surface of the surface with the welding bead; And a predetermined connection part positioned in a predetermined frame mounted to guide rail fastening members positioned at both ends of the first guide rail and connected to the traveling device.

In addition, the welder lower inspection probe holder has predetermined independent supports for supporting the two welder lower inspection probes separately, and adjust the position of each of the independent supports to any position in the left and right directions of the weld bead. It can be configured with a means capable of.

The penetration testing probe holder has predetermined independent supports for supporting a predetermined number of the penetration testing probes individually, and each of the independent supports mediates the penetration testing probe holder and a predetermined elastic body. And the force that the elastic body attracts the respective independent supports to the side surface of the member surface with the weld bead (horizontal force) It can be configured to have all the components of the pulling force (vertical force) at the downward perpendicular angle of the member surface.

On the other hand, the traveling device is a motor unit for driving by the predetermined motor drive signal;

A pair of front and rear driving wheels that rotate by receiving power from the motor unit and have magnetism; A flaw detection distance measuring unit for measuring a driving distance of the traveling device; A signal line connection unit connected to signal lines through which predetermined signals including the motor driving signal flow; A probe mounting part mounting part on which the probe mounting part is mounted; A main body for mounting each component of the traveling device; And a handle part of a predetermined shape mounted on the main body to receive a force when the traveling device is detached from the iron plate member.

At this time, the driving wheels are provided with grooves that are dug to a predetermined width and depth toward the center of the member contact surface so that the driving wheels can move along a predetermined rail, and the length between the front driving wheels is longer than the length between the rear driving wheels. It may be configured to have a means for mounting a predetermined disk (stopper) having a predetermined thickness and a radius larger than its radius on the outer surface of each drive wheel.

1 is an external view of a weld bead shown in a box-shaped steel structure,

2 is a detailed configuration diagram of the upper left weld bead of the box-shaped steel structure,

3 is an external view of an automatic ultrasonic inspection apparatus according to the present invention,

4 is an ultrasonic state diagram during the weld bead lower inspection,

5 is an ultrasonic state diagram at the time of inspection of the weld bead,

6 is an ultrasonic state diagram at the time of penetration depth inspection;

7 is a configuration diagram of a traveling device;

8 is a state diagram of a traveling device with a stopper mounted on a box-shaped steel structure;

9 is a plan view of the probe holder for the weld lower inspection,

10 is a configuration diagram of the probe module for all welds inspection;

11 is a detailed view of the probe holder for the penetration amount inspection.

* Explanation of symbols for main parts of the drawings

110: box-shaped steel structure 111, 112, 113, 114: weld bead

300: automatic ultrasonic inspection device 310: traveling device

311,312,313,314: Drive wheel 315: Signal line connection

316: transducer mounting stand mounting portion 317: handle portion

318: stopper 319: main body

320: transducer mounting table 321: first guide rail

322: second guide rail 323: left fixing bracket

324: right fixing bracket 325,326,327,328: guide rail fastening member

330: probe holder for welding lower part inspection

331,332: probe support for welding lower part inspection

333,341: connecting member 334,342: guide member

340: probe holder for all welds inspection

350: probe holder for the penetration amount inspection

351,352,353,354: probe support for penetration testing

410,420: probe for inspecting the lower part of the weld

510,520,530: transducers for inspection of all welds

610,620,630,640: penetration inspection probe

710: driving motor 720: flaw detection distance check unit

910: rotary knob

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is an external view of the automatic ultrasonic inspection apparatus (hereinafter referred to as automatic ultrasonic inspection apparatus) for welding bead inspection according to the present invention, using a digital ultrasonic flaw detector 370 and a predetermined motor driving device 380, The probe holder 330 for supporting the lower part of the welding part, the probe holder 340 for the entire welding part, and the probe holder 320 for supporting the penetration tester holder 350, and the probe mounting part 320 are mounted. The traveling device 310 that moves along, and the computer system 390 for analyzing and storing the ultrasound test results.

In the embodiment of the present invention, as the digital ultrasonic flaw detector 370, the micro-tomoscan (described above) μ -Tomoscan).

The traveling device 310 receives a power and a driving signal from a predetermined motor driving device 380 to perform a movement operation. The computer system 390 transmits a signal for an ultrasonic flaw detection result through the digital ultrasonic flaw detector 370. Receive. In addition, the transducers mounted on the respective transducer holders perform ultrasonic flaw detection while moving along the welding bead by driving of the traveling device 310.

Meanwhile, the motor driving device 380 is a device for supplying a motor driving signal and driving power to the traveling device 310, and the computer system 390 is a notebook base system, which is configured to display ultrasonic test result signals performed by various transducers. After receiving and analyzing through the micro-tomoscan 370, and stores in a predetermined data storage device.

First, the role of each probe will be described.

The weld bottom inspection probes 410 and 420 mounted on the weld bottom inspection probe holder 330 are arranged in a pitch-catch manner to monitor one third of the bottom of the weld. Use the Time Of Flight Diffraction channel to measure the root penetration depth.

4 is an ultrasonic state diagram at the time of the weld bead inspection, it shows a state of inspecting the upper left welding bead 111 of the box-shaped steel structure 110 by using the probe (410, 420) for the weld bottom inspection.

At this time, as a preferred embodiment by using a pair of the lower welding probes (410, 420) spaced apart from the welding bead 111 by a predetermined interval on the left and right sides of the welding bead 111, by the ultrasonic wave by the TOFD technique Have the test done. That is, one transducer 410 is used for ultrasonic transmission, and the other transducer 420 is used for ultrasonic reception.

The TOFD technique utilizes the generation of an indication by the waves diffracted at the ends of the defects as well as the waves emitted vertically when the ultrasound interacts with the Planar defects. That is, by using two longitudinal wave inclination angle probes having two predetermined angles as the welder lower inspection probes 410 and 420, the defect height is measured by using the difference between the defect tip and the diffraction wave arrival times at the tip.

The state of the range from the center portion to the lower portion of the welding bead 111 monitored by the two longitudinal wave angle transducers 410 and 420 is displayed on the TOFD screen of the micro tomoscan 370. Therefore, this technique is used to determine root penetration width and to evaluate weld defects.

The all-weld inspection probe mounted on the all-weld inspection probe holder 340 detects a weld internal defect by a single reflection method.

FIG. 5 is an ultrasonic state diagram during the entire weld bead inspection, and illustrates a state in which the upper left weld bead 111 of the box-shaped steel structure 110 is inspected using the probes 510, 520, and 530 for all weld inspection.

As a preferred embodiment, it is possible to use three pre-weld inspection probes 510, 520, and 530 spaced apart from the welding bead 111 by a predetermined distance.

Figure 10 schematically shows the appearance of the probe module for all weld inspection.

As a preferred embodiment, when using this module, a predetermined number of probe welding support plates 1010 are detachably installed inside the module support, which is a component of the probe welding holder holder 340. . At this time, as shown in Figure 10, the module is formed with a groove for accommodating the transducers (510 to 530) in the transducer support plate (1010) as well as a transfer rail for the movement of the transducer is installed, the screw is installed on one side of the transducer By rotating the screw it is possible to fix the transducer to a desired position along the transfer rail.

The three pre-weld inspection probes 510, 520, and 530 are installed in consideration of the beam spread so that the entire portion of the partial weld is inspected. In a preferred embodiment, the pulse-eco share at a predetermined angle as the probe for the pre-weld inspection is installed. Use the Pulse-Echo Shear Wave Angle transducer, and use the three channels (Pulse-Echo Shear Wave Angle channel) of the micro-tomoscan 370, respectively, upper 1/3, middle 1/3, and lower Cover one third of each. At this time, the angle of each probe is most preferably 45 ⁰ , but may be applied to 60 ⁰ , 70 ^0, etc. in some cases.

The flaw detection results detected by the probes 510, 520, and 530 for all the weld inspections are displayed on the B-screen of the micro-tomoscan 370. This can be used to find the length and approximate height of the defect. In addition, as a result of the flaw detection by the probe 510 closest to the weld bead 111, it is also possible to roughly estimate the penetration depth.

In this case, the probe holder 340 for inspecting the entire welded part is designed to be replaced and moved in accordance with the change in the angle of improvement and the thickness of the base metal.

The penetration inspection probe mounted on the penetration inspection probe holder is a longitudinal wave line focus straight transducer, and the weld bead 111 is formed from the side of the member to be inspected, that is, from the side of the member surface with the welding bead 111. It is used to check the welding depth by transmitting ultrasonic wave parallel to the surface with).

FIG. 6 is an ultrasonic state diagram at the time of welding depth inspection, and shows a state in which the penetration depth of the welding bead 111 is inspected using the penetration inspection probes 610, 620, 630 and 640.

Each of the penetration inspection probes 610, 620, 630, and 640 may inspect the penetration depth of a predetermined range, respectively, to inspect the penetration depth of the entire penetration depth. If the welding depth regulation value of any box-shaped steel structure 110 is 12 mm, it is preferable to inspect four penetration inspection probes by installing them at points 8, 10, 12, and 14 mm deep from the welding surface.

The flaw detection result is received by the micro-tomoscan 370 through a P / E LW (Pulse-Echo Longitudinal Wave) channel and is displayed on a predetermined penetration monitoring screen.

As the distance between the penetration inspection probes 610 to 640 and the welding bead 111 to be inspected changes, the penetration inspection probe is selected so that the effective distance range of the ultrasonic beam is sufficient, and the penetration inspection probe 610. To 640 are maintained at a constant position from the weld surface. In fact, in the manual method, the exact depth cannot be read, and a lot of errors occur depending on the inspector. The combination of these transducers accurately measures the depth of penetration to find irregularities in the penetration line.

As the three types of transducers described above, it is possible to obtain excellent detection performance by grasping the type and size of defects in a triple triple.

Now, the operation of the automatic ultrasonic inspection apparatus will be briefly described.

The operator of the automatic ultrasound testing apparatus 300 places the driving apparatus 310 on the welding bead to be inspected, and then inputs a driving command to the traveling apparatus 310 through the computer system 390. The driving device 310 has a pair of driving wheels 311, 312, 313 and 314 in the front and back as in a general passenger car. Since the driving wheels are magnetic wheels having magnetic properties, the driving device 310 can be driven upside down. That is, it is possible to run by hanging upside down on the weld beads (113, 114) on the lower surface of the inspection object member.

The traveling device 310 receiving the driving command starts to move along the corresponding welding bead, and the traveling device 310 is equipped with a predetermined probe mounting table 320.

In addition, the probe mounting stand 320 is equipped with a probe holder 330 for welding lower part inspection, a probe holder 340 for all welding part inspection, and a probe holder for penetration measurement, which is mounted on each holder. The inspection probes 410 and 420, the probes for welding all welds 510, 520 and 530, and the penetration inspection probes 610, 620, 630 and 640 perform the ultrasonic inspection, and as a result, send a signal to the micro tomoscan 370.

The micro-tomoscan 370 sends the received signal to the computer system 390, the operator reads the results displayed on the screen of the computer system 390, and takes the corresponding action. In this case, using the computer system 390 has an advantage of permanently storing the ultrasonic flaw detection result.

Now, each component of the automatic ultrasonic measuring apparatus 300 will be described in detail.

FIG. 7 is a configuration diagram of the traveling device 310, which includes a main body 319, driving wheels 311, 312, 313, and 314, a signal line connecting part 315, a probe mounting part mounting part 316, a handle part 317, and a stopper 318. ), A drive motor 710, and a flaw detection distance checking unit 720.

The traveling device 310 receives input of predetermined driving commands issued by the operator of the automatic ultrasound inspection apparatus 300 using the computer system 390 through a predetermined signal line, which is transmitted through the signal line connection unit 315. And connected to 310.

The signal line connecting unit 315 connects signal lines through which signals to be transmitted and received between control devices, such as the micro-tomoscan 370, the motor driving device 380, and the computer system 390, and the automatic ultrasonic inspection device 300. Part. Preferably, it is configured as predetermined wire connectors to facilitate insertion and removal of predetermined signal lines.

At this time, the signal line connecting portion 315 connects the electric wire inside the main body 319 to be connected to the corresponding terminal of the probe mounting portion mounting portion 316, so that the detection result signal of each of the probe mounting portion mounting portion 316 and the signal line connecting portion 315 Through the micro-tomoscan 370 as it is.

The drive motor 710 is driven in accordance with a drive signal input through the signal line connecting unit 315, and the drive wheels 311 to 314 mounted on a predetermined drive shaft (not shown) due to the drive of the drive motor 710. ) Is driven.

At this time, the driving wheels 311 to 314 are made of magnetic material. This is because the welding bead of the iron plate member may also exist below the iron plate member, so that the traveling device must be driven upside down to inspect the welding bead under the iron plate member. Therefore, the force that the driving wheels 311 to 314 attach to the iron plate member must be large enough to support the weight of the automatic ultrasonic inspection apparatus 300 and others added thereto.

On the other hand, as a more preferred embodiment of the drive wheels 311 to 314, the drive wheels 311 to 314 may move along a predetermined rail. To this end, for each of the four driving wheels (311 to 314) to make a groove that is dug by a predetermined width and depth in the central portion of the inspection member contact surface. Then, the automatic ultrasonic measuring device 300 can proceed along this groove.

In addition, as a way to improve the straightness of the traveling device 310, the outer surface of each of the four drive wheels (311 to 314) has a radius larger than its radius and a predetermined disc having a predetermined thickness (stopper: And a means capable of mounting a stopper). This disc is a mechanical force to maintain the inspection reference plane.

By doing so, it is possible to have the effect that both ends are slightly lowered below both sides of the railway so that the wheel of the train does not deviate from the rail. The stopper 318 is in close contact with the outer side of the member when the two wheels on the right or left side of the traveling device 310 is aligned with the edge of the member to be inspected. That is, unlike in the case of the train wheels, the stopper is mounted only on the outer edge of the member.

In this embodiment of the stopper, a disc having a predetermined thickness may be formed, and a screw hole is formed in the center of the outer side (the side of the edge of the inspection member) of the driving wheel, and the stopper 318 is raised to the center of the disc. It may be possible to have screws so that they can be connected together.

FIG. 8 is a schematic view showing the traveling device 310 lying on the predetermined box-shaped iron plate member with the stopper 318 mounted thereto.

In addition, the driving wheels 311 to 314 are configured such that the length between the front driving wheels 311 and 312 is greater than the length between the rear driving wheels 313 and 314 by a predetermined length (about 3 mm), so that the traveling device 310 is predetermined. Proceeding with the inclination of can improve the straightness more.

On the other hand, the handle portion 317 is made for the purpose of conveniently holding the automatic ultrasonic measuring device 300. In particular, since the driving wheels 311 to 314 are magnetic as long as the automatic ultrasonic measuring device 300 is suspended upside down on the iron plate member, when the end of the inspection, when detaching it from the iron plate member, a certain amount of force need. Therefore, the handle portion 317 is configured for this case.

As a preferred embodiment, as shown in Figure 3, it may be configured to be fixed to the main body 319 in the shape of a rectangular wing, a portion is drilled to hold by hand.

In addition, the flaw detection distance checking unit 720 measures the distance traveled by the traveling device 310.

At this time, the preferred embodiment has a predetermined memory (not shown) and a predetermined control signal input / output stage, so that the operator operates the reset operation, the traveling distance reporting operation, or the traveling distance set by the operator. You can stop it.

Of course, in this case, a predetermined driving stop signal output from the flaw detection distance checking unit 720 may be applied as a stop signal of the driving motor 710.

The main body 319 is a component in which all the components constituting the traveling device 310 are mounted, and the driving motor 710 and the flaw detection distance checking unit 720 are mounted at a predetermined place. At this time, preferably the drive motor 710 and the flaw detection distance 720 is installed in the body 319 to protect these components from external impact.

In addition, the main body 319 attaches the handle portion 317 to a predetermined place, and has a probe mounting portion mounting portion 316 for mounting a predetermined probe mounting portion 320 in the front of the travel direction, and a predetermined signal line at the rear side. It has a signal line connecting portion 315 to connect them.

Now, the transducer mounting stand 320 will be described in detail.

The transducer mounting unit 320 is mounted on the transducer mounting unit 316 of the traveling device 310 while supporting the transducer holders on which the respective transducers to perform ultrasonic inspection of the weld bead are mounted. Therefore, each transducer can inspect the weld bead while moving by the traveling of the traveling device 310.

This, the appearance of one embodiment of the transducer mounting stand 320 is as shown in Figure 3, the transducer mounting stand 320 forms a part of the automatic ultrasonic inspection device 300 together with the traveling device (310).

At this time, since the automatic ultrasonic inspection apparatus 300 should be operated by hanging upside down, the transducer mounting table 320 uses a light material as much as possible. In one embodiment, it is preferable to manufacture using aluminum. In addition, the transducer mounting stand 320 is provided with a predetermined connection portion for connecting to the transducer mounting stand mounting portion 316 of the traveling device 310 for physical connection with the traveling device 310.

As described above, the probe holder supported by the probe mounting stand 320 includes a probe holder 330 for inspecting the lower part of the weld, a probe holder 340 for inspecting the entire weld, and a probe holder 350 for the penetration amount inspection. In addition, each holder is provided with a transducer support for supporting the transducers. Here, the transducer support means a portion in which a predetermined ultrasonic inspection probe is mounted, and the holder means an integral means for installing the transducer support on the transducer mounting stand 320.

At this time, the lower weld probes 410 and 420 are preferably positioned one by one distance to the left and right from the weld bead, so that the distance between the two weld lower probes 410 and 420 and the weld bead can be arbitrarily adjusted. .

In one embodiment, when the two transducers 410 and 420 are simultaneously narrowed toward or away from the welding bead by a predetermined adjusting device, the distance from the welding bead may be the same, so that the ultrasonic flaw detection result is more accurate. Could be done.

The probes 510 to 530 for all weld weld inspections are spaced apart by a predetermined distance to the right of the travel direction from the weld bead so that the three are gathered together at regular intervals. At this time, as shown in FIG. 10, a probe module in which three probes are integrated can be used.

In addition, with respect to the penetration inspection probes (610 to 640) to be positioned at regular intervals along the side surface of the surface in which the penetration beads are present.

11 is a detailed view of the probe holder 350 for the penetration amount inspection, Figure 11a is a plan view, Figure 11b is a left side view, Figure 11c is a rear view.

As shown in FIG. 11A, four penetration inspection probe supports 351 to 354 are provided with penetration inspection probes 610 to 640, respectively, and the probes 610 to 640 are parallel to the weld bead plane. Make sure that the welding bead is close to the side where the welding bead is located.

In addition, as shown in Figure 11b each of the four penetration test probes (610 to 640) to be separated from the surface with the welding bead in order at regular intervals, so that the inspection depth can be divided all from the top to the bottom do.

On the other hand, as shown in Figure 11c, the penetration support probe holder (351 to 354) to each of the penetration test probe holder 350 through the predetermined elastic body in order to be in close contact with the side of the surface with the weld bead ).

Now, an embodiment of the transducer mounting table 320 to be mounted on the traveling device 310 will be described in detail with reference to FIG. 3.

The first guide rail 321 and the second guide rail 322 are respectively installed at a predetermined distance in front and rear of the probe mounting stand 320, and the first and second guide rails are disposed on the left and right sides of the first and second guide rails 321 and 322, respectively. Fixing brackets 323 and 324 for fixing 321 and 322 are respectively installed.

Guide rail fastening members 325 to 328 to which the first and second guide rail ends are fixed are installed inside the fixing brackets 323 and 324, and between the first guide rail 321 and the second guide rail 322. The probe holder 340 for inspecting all welds in the space may be connected and installed through the connecting member 341 and the guide member 342 to move along the first guide rail 321.

The probe support plate 1010 for inspecting the former weld part is detachably installed inside the probe holder 340 for the former weld part inspection.

In addition, the front of the second guide rail 322 is equipped with a probe holder for welding lower part inspection 330, each having a probe support (331, 332) for the lower weld inspection separated separately left and right, the second guide rail 322 It is connected and installed through the connecting member 333 and the guide member 334 to be moved along.

FIG. 9 is a plan view of an embodiment of the welder lower inspection probe holder 330, and the welder lower inspection probe supports 331 and 332 rotate the predetermined rotary knob 910 to each other by the operation of the rack and pinion. It can be configured to move in a direction away from or closer to each other.

On the other hand, the lower portion of the connection brackets (325, 326) installed on the outer side of the probe mounting table 320 is coupled to the penetration amount of the probe holder 350 for the penetration amount inspection, the penetration amount of the probe holder 350 for the penetration amount inspection probes It has the supports 351 to 354.

That is, the penetration inspection probe holder 350 has predetermined independent supports 351 to 354 which individually support four penetration inspection probes 610 to 640, and the independent supports 351 to 354. 354 is configured to be in close contact with the side of the surface of the member surface with the weld bead connected to each other through the penetration test probe holder 350 and a predetermined elastic body, and also the elastic body pulls each independent support (351 to 354) The pulling force is configured to have both the force of pulling at right angles (horizontal force) to the side surface of the member face with the weld bead and the force of pulling at right angles (vertical force) at the right angle of this member face.

Hereinafter, a method of inspecting a weld bead existing in a predetermined inspection target member by using the automatic ultrasonic inspection apparatus 300 described above will be described.

First, the state of a predetermined inspection target member such as the shape, thickness, flaw length, and the like of the member is examined, and foreign matter in the inspection target member is removed to remove an irregular state that impedes the running of the traveling device 310.

The initial starting point is marked on the inspection target member, which is for re-exploration. In other words, it is possible to re-inspect the same inspection section, it is possible to efficiently perform the progress of defects of the weld bead or verification of the inspection results.

Meanwhile, for accurate ultrasonic flaw detection, the incident point and the refraction angle of each probe to be mounted on the automatic ultrasonic inspection apparatus 300 are corrected, and the arrangement and angle of each probe are adjusted.

After the inspection preparation is completed, the ultrasonic inspection is started by giving a traveling command to the traveling device 310 using the computer system 390.

Upon receiving a signal for the ultrasound test results from each transducer, the three-dimensional screen of the computer system 390 is used to confirm the overall location and distribution of the weld defects appearing in the weld beads. Then, the depth, width, and height of the weld defects are checked on the predetermined TOFD screen, and the weld defects identified through the predetermined longitudinal ^wave composite screen or the B-screen are reconfirmed.

After reconfirmation, amplification is confirmed using a predetermined A-screen for the identified defect. Then, after checking the amplification, length, position, and width of the weld defects identified so far, and comparing them with a predetermined acceptance criteria, if a predetermined defect does not exist, a predetermined acceptance report is outputted, and if a predetermined defect exists, Print a defect report in the format.

Finally, when the examination is finished, the first information on the results of the examination is stored in a predetermined recording medium.

As described above, using the present invention, several transducers can simultaneously scan the weld bead to identify the three-dimensional defect shape by only one scan, and also provide a permanent record for future maintenance. Therefore, since defects in the weld beads of the steel structure can be accurately detected, there is an effect of improving the safety of the steel structure.

Claims (6)

In the device for inspecting the weld beads of the steel structure using the micro-tomoscan 370 and the predetermined motor drive device 380, a probe for inspecting the lower portion of the weld bead for inspecting the lower portion of the weld bead. Welding probe holder 330 for welding lower part inspection, in which a predetermined number of probes for inspecting the entire welding bead are mounted, a predetermined number of probe welding probe holders 340 for inspecting the entire welding bead, and the welding A transducer mounting table 320 for supporting a penetration inspection probe holder 350 in which a predetermined penetration inspection probe for inspecting a penetration amount of a bead is mounted by a predetermined number; A traveling device 310 mounted with the probe mounting table 320 and moving along the welding bead by a predetermined motor driving signal received from the motor driving device 380; And And a computer system 390 for controlling the traveling device 310 and receiving an ultrasonic test signal inspected by each transducer through the micro-tomoscan 370 to analyze a state of the welding bead and output the predetermined form in a predetermined format. Automatic ultrasonic inspection device for welding bead inspection, characterized in that comprising a. The method of claim 1, wherein the probe mounting unit 320, the first guide rail 321 and the second guide rail 322 which is installed at a predetermined distance in the front, rear; Fixing brackets 323 and 324 positioned between the right end and the left end of each of the first guide rail 321 and the second guide rail 322 to maintain the distance between the guide rails; Guide rail fastening members 325 to 328 positioned inside the fixing brackets 323 and 324 to fix respective ends of the first guide rail 321 and the second guide rail 322; Located in the space between the first guide rail 321 and the second guide rail 322, the predetermined connecting member 341 and the guide member 342 to move along the first guide rail 321 A probe holder 340 for inspecting all welded portions connected to each other; Located in front of the second guide rail 322, the probe holder for the lower welding part connected through a predetermined connecting member 333 and the guide member 334 to be moved along the second guide rail 322 330; A penetration holder (350) for inspecting a penetration amount which is positioned below the outer fixing bracket (323) among the fixing brackets (323, 324) to be in close contact with the side surface of the surface with the welding bead; And And a predetermined connection part positioned in a predetermined frame mounted on the guide rail fastening members 326 and 328 located at both ends of the first guide rail 321 to connect with the traveling device 310. Automatic ultrasonic inspection device for welding bead inspection. 2. The welding lower holder inspection holder 330 has predetermined independent supports 331 and 332 for supporting the two welding lower inspection probes separately, respectively. And a means for adjusting the position of the welding bead to any position in the left and right directions of the welding bead. According to claim 1, wherein the penetration inspection probe holder 350 has a predetermined number of independent supports (351 to 354) for individually supporting a predetermined number of the penetration inspection probe, Each of the independent supports 351 to 354 is configured to be in close contact with the side surface of the member surface with the welding bead connected to each other through the penetration test probe holder 350 and a predetermined elastic body, In addition, the force that the elastic body pulls each of the independent supports 351 to 354 is the force of pulling at right angles (horizontal force) to the side surface of the member surface on which the weld bead is located and the force of pulling down at right angles of the member surface (vertical force). Automatic ultrasonic inspection device for welding bead inspection, characterized in that configured to have all the components. According to claim 1, The traveling device 310 comprises a motor unit 710 for driving by the predetermined motor drive signal; A pair of driving wheels 311 to 314, which are rotated by receiving power from the motor unit 710 and have a magnetic front and rear pairs; A flaw detection distance checking unit 720 for measuring a driving distance of the traveling device 310; A signal line connection unit 315 to which signal lines through which predetermined signals including the motor driving signal flow, are connected; A probe mounting part mounting part 316 to which the probe mounting part 320 is mounted; A main body (319) for mounting each component of the traveling device (310); And Automatic ultrasonic welding for welding bead inspection, characterized in that it comprises a handle 317 of a predetermined shape that is mounted to the main body 319 to receive a force when the traveling device 310 is removed from the iron plate member Inspection device. The method of claim 5, wherein the driving wheels (311 to 314), there is a groove that is excavated by a predetermined width and depth toward the center of the member contact surface to move along a predetermined rail, The length between the front drive wheels (311, 312) is greater than the length between the rear drive wheels (313, 314) by a predetermined length, Welding bead inspection, characterized in that the outer surface of each drive wheel (311 to 314) is provided with a means for mounting a predetermined disk (stopper) having a radius larger than its own radius and having a predetermined thickness Automatic Ultrasonic Testing Machine.