JPH09311124A - Semi-automatic fluorescent magnetic particle inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automate injecting work of magnetic particle solution, exciting work by magnetizing device, and emitting work of ultraviolet ray to semi-automate a welding inspection by loading all equipments necessary for inspection of the welding defect of a welding bead on a self-traveling truck followed by moving. SOLUTION: A self-traveling truck 2 is loaded with a magnetizing device 3 for exciting the flaw detection effective range on a welded bead, an ultraviolet ray emitting lamp 4 for emitting ultraviolet rays to the excited flaw detection effective range, a magnetic particle injector 5 for injecting a magnetic particle solution onto the welding bead, and a control part 10 for controlling each of these equipments. A semi-automatic fluorescent magnetic particle inspection device 1 is carried onto a steel-made floor surface to be inspected for welding, and the magnetizing device 3 loaded on the self-traveling truck 2 of the inspection device 1 is moved and regulated so as to be situated just above a welding bead. The self-traveling truck 2 of the inspection device 1 is moved and regulated so that its moving direction is conformed to the welding bead direction. Inspection conditions such as moving pitch, static time, magnetizing time, injecting time and injecting quantity of the magnetic particle solution (a) are preliminarily inputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent magnetic particle flaw detector for detecting a welding defect of a weld bead in a fillet weld or a butt weld of a flat portion, and more particularly to a fluorescent magnetic flaw detector for a self-propelled carriage. The present invention relates to a semi-automatic fluorescent magnetic particle flaw detector, which is mounted on a substrate to perform flaw detection work, and the flaw detection work is semi-automated to improve work efficiency.

[0002]

2. Description of the Related Art Conventionally, in flaw detection work for finding a welding defect of a weld bead in a fillet weld portion or a butt weld portion of a flat portion, there are three types of a portable magnetizing device, a magnetic particle liquid injector and an ultraviolet irradiation lamp. A worker carries the device while working.

[0003]

However, in the above-mentioned flaw detection work, two workers are required because the above-mentioned three types of equipment for flaw detection are carried while carrying out the work. Further, since the work is an inspection in which the user is bent down and moving laterally little by little, there is a problem that the work is easy to occur and the work efficiency is lowered.

The present invention was made in view of the above problems and was devised to solve the problems. The purpose of the present invention is to provide all the equipment necessary for inspecting welding defects to workers. There is no need to carry it with the user, and in addition, the work of spraying the magnetic powder liquid, the excitation work by the magnetizing device, and the irradiation work of the ultraviolet rays from the ultraviolet irradiation lamp can be automated to semi-automate the flaw detection work and improve the work efficiency. An object of the present invention is to provide a semi-automatic fluorescent magnetic particle flaw detector.

[0005]

In order to achieve the above object, the invention of claim 1 is provided with a self-propelled trolley that moves along the welding bead and excites the effective area for flaw detection on the welding bead surface. Magnetizing device, an ultraviolet irradiation lamp that irradiates ultraviolet rays to the effective flaw detection area magnetized on the welding bead, and a magnetic particle liquid injector that is installed in front of the magnetizing device and injects a magnetic particle liquid on the welding bead. A control unit for controlling each of these devices is at least mounted on the self-propelled carriage.

According to the invention of claim 2, a self-propelled carriage that moves along the welding bead is provided, and a magnetizing device for exciting a flaw detection effective range on the surface of the welding bead and a magnetizing device for exciting the welding bead. The ultraviolet irradiation lamp for irradiating the flaw detection effective range with ultraviolet rays, the magnetic particle liquid injector installed in front of the magnetizing device and for injecting the magnetic particle liquid onto the welding bead, and the state of the magnetized magnetic powder on the welding bead. It comprises at least a means for mounting a photographing device for photographing, a display device for displaying the photographed contents on the screen, and a control unit for controlling each of these devices on the self-propelled carriage.

[0007] In a preferred embodiment, the self-propelled carriage is equipped with a distance measuring device for measuring the moving distance, and the information on the moving distance measured by the distance measuring device is the content of the image taken by the photographing device on the screen. In addition, the self-propelled trolley is equipped with a recording device for recording the contents taken by the camera, and the information on the moving distance measured by the distance measuring device is taken by the camera. It is preferable that the contents are recorded when the contents are recorded in the recording device. Furthermore, it is preferable that a remote controller for adjusting the moving direction of the self-propelled carriage is provided.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically based on embodiments of the invention shown in the drawings. Here, FIG. 1 is a side view of the semi-automatic fluorescent magnetic particle flaw detector, FIG. 2 is a plan view of the semi-automatic fluorescent magnetic particle flaw detector, and FIG. 3 is AA of FIG.
FIG. 4 is a view taken in the direction of arrow BB in FIG. 1, and FIG. 5 is a block diagram of the control unit.

In the figure, a semi-automatic fluorescent magnetic particle flaw detector 1
Moves along the weld bead in the fillet weld or the butt weld of the flat portion, excites it along the weld bead using the equipment mounted, and injects the magnetic powder liquid a. After dripping, the operator irradiates ultraviolet rays and fluoresces the magnetic particles collected in the welding cracks, and the operator directly or through the indicator 7 described later visually identifies the welding defect. It has the feature that one operator can perform flaw detection inspection without having to carry the device.

The semi-automatic fluorescent magnetic particle flaw detector 1 is equipped with various equipments and moves along a welding bead 2. A self-propelled trolley 2, a magnetizing device 3 for exciting and magnetizing a flaw detection effective range on the welding bead surface, and a welding bead. Ultraviolet irradiation lamp 4 for irradiating the above-mentioned excited magnetized flaw detection effective range with ultraviolet rays, magnetic powder liquid a on the welding bead
Magnetic liquid ejector 5 for injecting a magnetic field, a photographing device 6 mounted as necessary for photographing the state of the magnetized magnetic powder on the welding bead, and the contents photographed by the photographing device 6 are displayed on the screen. A display device 7 that is mounted as necessary for the purpose, a distance measuring device 8 that is mounted as necessary for measuring the moving distance,
Mainly from a recording device 9 mounted as necessary for recording the contents photographed by the photographing device 6, a control unit 10 for controlling each of these devices, a remote controller 11 operable from a remote place, and the like. It is configured.

The self-propelled trolley 2 has a rectangular shape that is long in the front-rear direction when viewed from above and has a hollow box shape inside, and the equipment installed inside is disturbed by magnetism. In order to prevent this, the magnetic shield 2a is attached in a box shape surrounding the hollow interior to protect the interior. Front wheels 2b, 2b are provided on the front and rear portions below the left and right sides of the self-propelled carriage 2.
And rear wheels 2c, 2c are attached respectively.

Front wheels 2b, 2b and rear wheels 2c, 2c
Is the outer surface of the circumferential surface of each wheel is inclined,
It facilitates loading from a small-diameter loading port to the inspection location and speeds up steering. Front wheels 2b, 2b and rear wheels 2
For example, oil-resistant rubber tires having a diameter of 200 mm are used for c and 2c.

Rear wheels 2c, 2c are provided at the rear of the self-propelled carriage 2.
A traveling motor 2d for driving the vehicle is mounted. An endless timing belt 2e for transmitting power is wound between the shafts having the left and right rear wheels 2c, 2c attached to both ends thereof and the traveling motor 2d, and the driving force of the traveling motor 2d is Left and right rear wheels 2c, 2c that are transmitted to the shaft via the timing belt 2e and are attached to both ends of the shaft.
Is rotated to move the self-propelled carriage 2.

The traveling motor 2d is controlled by a command from the controller 10 to drive the rear wheels 2c, 2c to move the self-propelled carriage 2. The self-propelled carriage 2 can be moved forward or backward by rotating the traveling motor 2d in the normal or reverse direction.

Further, the front wheels 2b, 2b are provided with a coaxial steering mechanism, and the angle can be changed to the left and right. The steering motor 2f of the steering mechanism is controlled by a command from the control unit 10 to change the direction of the front wheels 2b, 2b to the left or right within a range of, for example, 30 degrees. The steering motor 2f is installed on the right side of the traveling motor 2d and on the upper side of the front wheel 2b.

The center of the self-propelled carriage 2, that is, the front wheels 2b,
A magnetizing device 3 is provided between the 2b and the rear wheels 2c, 2c so as to be movable up and down. The magnetizing device 3 descends and comes into contact with the steel floor surface to excite and magnetize the effective flaw detection area on the weld bead surface. In this case, if there is a welding defect, that is, a welding crack, in the weld bead on the excited steel floor surface,
The magnetic particles in the magnetic powder liquid a sprayed on the welding bead by the magnetic powder liquid injector 5 are magnetic pole ends of the N pole and the S pole on both sides across the crack, and the both sides of the magnetic powder are a north pole and S pole across the crack. The so-called magnetic powder indicating pattern is formed at the weld crack portion by being attracted and gathered at the magnetic pole end that has become a pole. In this embodiment, the magnetizing device 3 is, for example, a quadrupole magna using a rotating magnetic field.

When a quadrupole magna is used in the magnetizing device 3, when exciting the effective area of flaw detection on the weld bead surface,
It is possible to simultaneously excite two orthogonal directions, and when inspecting a welding defect of the welding bead, it is not necessary to rotate the self-propelled carriage 2 even when the welding direction of the welding bead is changing midway. That makes the inspection easier. The magnetizing device 3 is controlled by a command from the control unit 10.

At the center of the hollow interior of the self-propelled carriage 2, there is provided a rectangular support base 3a for suspending the magnetizing device 3 up and down, and the magnetizing device 3 is provided below the support base 3a. Suspended so that it can be raised and lowered freely. A screw hole (not shown) is vertically formed in the center of the support base 3a, and a suspension shaft 3b made of a screw rod is vertically penetrated and screwed into the screw hole.

The suspension shaft 3b extends in the vertical direction, and a rectangular suspension plate 3e is attached to the lower end of the suspension shaft 3b. Springs 4f that absorb impact are provided at four locations below the hanging plate 3e.
Is attached to the magnetizing device 3 via the spring 3f.
Is installed. The magnetizing device 3 is suspended from the support base 3a via a suspension shaft 3b, a suspension plate 3e and a spring 3f.

An elevating motor 3c for elevating the magnetizing device 3 is installed at the upper center of the support base 3a so as to face forward. The lifting motor 3c is interlocked with the upper side of a suspension shaft 3b extending above the support base 3a.

The suspension shaft 3b rotates forward / reversely in conjunction with the driving of the lifting motor 3c, and the suspension shaft 3b rotating forward / reversely ascends / descends by the screw motion, and the suspension plate 3e at the lower end of the suspension shaft 3b. It is a mechanism for moving up and down the magnetizing device 3 suspended via the spring 3f. The elevating motor 3c is controlled by a command from the control unit 10 to elevate the magnetizing device 3 and its elevating speed is variable.

At the front part inside the hollow of the self-propelled carriage 2, a transformer 3d for generating a rotating magnetic field to be supplied to the magnetizing device 3 is installed. This transformer 3d is detachable and can be easily replaced according to the difference in power frequency in Japan.

The ultraviolet irradiation lamp 4 irradiates the welding bead surface excited by the magnetizing device 3 with ultraviolet light so as to emit fluorescence from the magnetic powder indicating pattern formed on the weld crack. It is installed in the rear where the is suspended. The ultraviolet irradiation lamp 4 is installed in the middle of the left and right rear wheels 2c, 2c on the lower side of the rear portion of the self-propelled carriage 2 so as to face slightly downward and face forward. An inverter power supply 4a of the ultraviolet irradiation lamp 4 is installed inside the hollow of the self-propelled trolley 2 on which the ultraviolet irradiation lamp 4 is installed.

The worker visually observes that the magnetic particles gathered in the welding cracks emit fluorescence by the ultraviolet rays emitted from the ultraviolet ray irradiation lamp 4 directly or through the indicator 7,
Determine if the weld bead has a welding defect. As the ultraviolet irradiation lamp 4, for example, a mercury lamp having a filter that blocks visible light is used.

The magnetic particle liquid injector 5 is a device for injecting the magnetic particle liquid a onto the weld bead to be inspected, and is installed in the center of the front end of the self-propelled carriage 2 so as to be capable of injecting obliquely downward. In this embodiment, for example, a magnetic particle liquid sprayer is used for the magnetic particle liquid injector 5, and the magnetic particle liquid injector 5 made of the magnetic particle liquid spray is attached to the center of the front end of the self-propelled carriage 2. Tool 5a is provided.

The magnetic powder injector 5a is used for the self-propelled carriage 2
It is attached diagonally downward at the center of the front end of. The magnetic powder injector 5a is provided at its upper end side with a pressing piece 5b for pressing the nozzle of the magnetic powder injector 5 made of magnetic powder spray to eject the magnetic powder a. The pressing piece 5b is configured to be able to descend obliquely downward by a solenoid valve 5c.

The pressing piece 5b is connected to an actuating iron core which is attracted by an electromagnetic coil (not shown) of the electromagnetic valve 5c,
The electromagnetic valve 5c for lowering the pressing piece 5b is controlled by a command from the control unit 10, and the magnetic powder liquid injector 5 is controlled.
The injection time, the injection amount, and the like of the magnetic powder liquid a are controlled. A spring (not shown) is provided to push up the lowered pressing piece 5b to restore the original state.

The photographing device 6 is a device for recording the state of the magnetic powder on the welding bead excited by the magnetizing device 3 as an image, and is installed on the side of the magnetizing device 3 in an obliquely downward direction. The imager 6 is attached to the lower part of a suspension member 6a extending downward from one side of the self-propelled carriage 2 which is one side of the magnetizing device 3 so as to be able to move up and down and to rotate horizontally.

The photographing device 6 is controlled by a command from the control unit 10 and photographs the state of the magnetic powder on the welding bead formed by excitation as an image. The camera 6 is equipped with a CCD (Ch
Abbreviation of arge Coupled Device: solid-state imaging device) Cameras are used.

The display device 7 is a device for displaying the contents photographed by the photographing device 6 as a moving image on the screen, and is provided on the front side of the self-propelled carriage 2. A television screen or the like is used as the display unit 7. The indicator 7 is attached to the upper part of the self-propelled carriage 2 so as to be attachable and detachable.

Through this indicator 7, the worker can visually observe that the magnetic powder indicating pattern formed on the weld crack of the weld bead emits fluorescence by irradiating with ultraviolet rays, and bends down as in the conventional case. Fatigue can be reduced as compared with the case where the magnetic powder indicating pattern formed on the weld crack of the weld bead emits fluorescence directly.

The distance measuring device 8 is a semi-automatic fluorescent magnetic particle flaw detector 1.
Is a device for measuring the movement distance from the start position, and is a mechanism for calculating and measuring the movement distance from the start position from the diameter, the rotation angle, and the rotation speed of the rear wheel 2c. It is performed by the control unit 10. The distance measuring device 8 uses, for example, a rotary encoder that measures a rotation angle and a rotation speed, and is coaxially attached to the rear wheels 2c and 2c to detect the rotation angle and the rotation speed.

The information on the moving distance from the start position of the semi-automatic fluorescent magnetic particle flaw detector 1 measured by the distance measuring device 8 is the state of the magnetic powder indicating pattern on the welding bead formed by the excitation photographed by the photographing device 6. Is displayed together on the screen of the display 7, and the welding defect position from the start position of the semi-automatic fluorescent magnetic particle flaw detector 1 can be accurately guided.

The recording device 9 is a device for recording a moving image of the magnetic powder indicating pattern on the excited magnetized welding bead, which is recorded by the photographing device 6, and the recording device 9 records the contents photographed by the photographing device 6. Information on the moving distance measured by the distance measuring device 8 at the time of recording can also be recorded. When the information of the moving distance from the start position of the semi-automatic fluorescent magnetic particle flaw detector 1 is also recorded, it is necessary to accurately guide the welding defect position from the start position when reproducing and recording the inspection result later. You can

The recording device 9 is attached at the same position as the display 7, and the recording device 9 integrated with the display 7 may be used. As the recording device 9, one having not only a recording function but also a reproducing function is used.
The recorded contents can be reproduced and viewed using the display unit 7, but only the recording only may be used.

The control unit 10 includes a semi-automatic fluorescent magnetic particle flaw detector 1
A state in which the magnetic powder liquid a is jetted along the welding bead to excite the bead surface and irradiate it with ultraviolet rays to fluoresce from the magnetic powder indicating pattern formed in the weld crack. Then, this is semi-automated so that a worker can see it, and for example, a computer such as a one-board microcomputer or a sequence driver is used. A program for controlling each device of the semi-automatic fluorescent magnetic particle flaw detector 1 is previously input to the control unit 10.
The control unit 10 is installed on the front half side inside the hollow of the self-propelled carriage 2.

The control unit 10 includes the traveling motor 2 described above.
d, the steering motor 2f, the magnetizing device 3, the lifting motor 3c, the solenoid valve 5c, the photographing device 6 and the like to operate these devices to inject and energize the magnetic powder a conventionally used by workers. In addition, the manual operation of irradiation is omitted, and the worker controls the semi-automatic fluorescent magnetic particle flaw detector 1 so that the worker can concentrate on the visual work for inspecting the weld beads for defects.

The driving power source 10a includes the traveling motor 2d, the steering motor 2f, and the lifting motor 3 described above.
c, a sequence driver as a power source for driving the solenoid valve 5c, etc., and is installed on the latter half side of the hollow interior of the self-propelled carriage 2.

The remote control device 11 is a device for mounting various devices and adjusting the moving direction of the self-propelled trolley 2 moving along the welding bead from a remote place. The remote control device 11 is connected through a cable 11a. It is connected to the control unit 10 of the self-propelled carriage 2.

Next, the operation based on the configuration of the embodiment of the present invention will be described below. The semi-automatic fluorescent magnetic particle flaw detector 1 is carried on the steel floor surface for welding inspection, and the magnetizing device 3 mounted on the self-propelled trolley 2 of the semi-automatic fluorescent magnetic particle flaw detector 1 is directly above the weld bead across the welding bead. Adjust to move to.

At this time, the movement adjustment is performed so that the movement direction of the self-propelled carriage 2 of the semi-automatic fluorescent magnetic particle flaw detector 1 and the welding bead direction coincide with each other. In addition, the movement pitch, the rest time,
The inspection conditions such as the magnetization time, the injection time of the magnetic powder a, and the injection amount are input. This makes it possible to automate operations other than visual inspection by workers.

Then, the semi-automatic fluorescent magnetic particle flaw detector 1 is operated. At the same time, the ultraviolet irradiation lamp 4 is turned on. The operation of the semi-automatic fluorescent magnetic particle flaw detector 1 and the lighting of the ultraviolet irradiation lamp 4 are
It can also be performed using the remote controller 11.

When the semi-automatic fluorescent magnetic particle flaw detector 1 is operated, the traveling motor 2d is instructed by the control unit 10.
The driving force of the traveling motor 2d that is driven by is transmitted to the rear wheels 2c, 2c via the timing belt 2e, the rear wheels 2c, 2c rotate, and the self-propelled carriage 2 moves forward at a certain speed. . In this embodiment, the maximum speed of the self-propelled carriage 2 is 30 m / min.

At the same time, the control section 10 energizes the electromagnetic coil of the electromagnetic valve 5c of the magnetic particle liquid injector mounting tool 5a to drive the operating iron core of the electromagnetic valve 5c. The pressing piece 5b is lowered by the actuating iron core of the electromagnetic valve 5c to be driven, and presses and pushes down the nozzle of the magnetic particle liquid injector 5 made of the magnetic particle liquid spray attached to the magnetic particle liquid injector attaching tool 5a. As a result, the magnetic particle liquid a is ejected from the magnetic particle liquid injector 5 obliquely downward and forward.

Since the magnetic particle liquid injector 5 for injecting the magnetic particle liquid a is provided at the center of the front end of the forward-moving bogie 2, the front of the magnetizing device 3 provided at the central portion of the self-propelling bogie 2. The magnetic particle liquid a can be jetted onto the welding bead.

The self-propelled carriage 2 is inputted so as to repeatedly move and stop at a pitch of 100 mm, and the moving speed of the self-propelled carriage 2 is about 100 mm / sec. Weld beads will be inspected at a pitch of 100 mm, for example.
The pitch can be varied within the range of 0 to 200 mm.

When the self-propelled carriage 2 moves forward by, for example, 100 mm, the traveling motor 2d is stopped in response to a command from the control unit 10, whereby the self-propelled carriage 2 also stops. In accordance with the stop of the self-propelled trolley 2, the operating iron core adsorbed to the electromagnetic coil of the electromagnetic valve 5c is released by a command from the control unit 10, and the pressing piece 5b is lifted by the spring to press the nozzle. The magnetic powder liquid a is jetted from the magnetic powder liquid injector 5 after the release.

After stopping the self-propelled carriage 2, the controller 10 immediately drives the lifting motor 3c. The lifting shaft 3b is rotated in a fixed direction by a lifting motor 3c that is driven and descends by a screw movement. The magnetizing device 3 is connected to the lower end of the descending suspension shaft 3b, and the magnetizing device 3 also descends integrally and comes into contact with the steel floor surface. For example, the magnetizing device 3 is set to contact the steel floor surface in 1 second.

In the control unit 10, electricity is applied to the magnetizing device 3 which descends and comes into contact with the steel floor surface to magnetize the magnetizing device 3. Magnetizing device 3
The magnetizable time can be adjusted in the range of 0 to 99 seconds, for example.

When the magnetizing device 3 comes into contact with the steel floor surface, the excitation magnetization within the effective flaw detection range is carried out. In this case,
If there is a welding defect, that is, a weld crack in the weld bead on the magnetized steel floor surface, both sides of the weld bead will become magnetic pole ends of the N pole and the S pole across the crack, and the magnetic particle liquid injector 5 sprays the weld bead onto the weld bead. The magnetic powder in the magnetic powder liquid a is attracted and gathered at the magnetic pole ends having N pole and S pole on both sides of the crack,
A magnetic powder pattern is formed on the weld crack. When ultraviolet rays are radiated from the ultraviolet irradiation lamp 4 installed behind the magnetizing device 3 to the magnetized flaw detection effective range, the magnetic powder indication pattern formed by being attracted to the welding cracks emits fluorescence, so that the operator can visually check. Weld defects can be identified.

From the rear or the side of the self-propelled carriage 2, the worker uses the photographing device 6 to photograph the magnetic powder indication pattern formed in the excitation range on the welding bead that emits fluorescence by the ultraviolet rays emitted from the ultraviolet ray irradiation lamp 4. The presence or absence of welding defects is determined by visually observing what is displayed on the screen of the display 7 after photographing. In this case, on the screen of the display device 7, when the above contents are displayed, information on the moving distance from the start position measured by the distance measuring device 8 is also displayed. The contents displayed on the screen of the display 7 are recorded by the recording device 9 as needed.

Since the worker can inspect the presence or absence of welding defects by looking at the screen of the display 7, he or she must sit down to directly see the magnetized magnetic powder indicating pattern on the welding bead that emits fluorescence as in the conventional case. Since there is no need to bend down, work fatigue can be greatly reduced. If a weld defect in the weld bead is found, mark that part as a mark.

The marking work may be collectively performed later. That is, after the inspection using the semi-automatic fluorescent magnetic particle flaw detector 1 is completed, the recording in which the inspection content is reproduced is viewed, and the magnetic powder indication pattern formed in the excitation range on the welding bead emitting fluorescence is recorded. The marking operation may be performed by using the information on the moving distance from the start position measured by the distance measuring device 8 that is simultaneously combined with.

When the magnetizing device 3 comes into contact with the steel floor surface for a predetermined time, the controller 10 issues a command to rotate the lifting motor 3c in the opposite direction. The suspension shaft 3b that is linked to the lifting motor 3c also rotates in the opposite direction, and the suspension shaft 3b that rotates in the opposite direction rises due to the screw movement, and the suspension plate 3e is attached to the lower end of the rising suspension shaft 3b. And spring 3f
The magnetizing device 3 suspended via the unit also rises as a unit and is separated from the steel floor surface to be in a non-contact state.

The rising time of the magnetizing device 3 is set to, for example, 1 second. When 1 second has elapsed, the lifting motor 3c is stopped by a command from the control unit 10, and the suspension shaft 3b rotates in conjunction with this. Originally, the lifting motion of the suspension shaft 3b, which is lifted by the screw motion, is stopped, and the lifting of the magnetizing device 3 suspended at the lower end of the suspension shaft 3b via the suspension plate 3e and the spring 3f is stopped.

In this embodiment, the magnetizing device 3 is raised,
The movement of the traveling motor 2d and the lowering of the magnetizing device 3 are set to be performed in 1 second, respectively. Therefore, the waiting time until the inspection of the welding bead at one place is completed and the inspection of the next place is started. It takes about 3 seconds, and the welding bead can be inspected efficiently.

In this embodiment, the ascending / descending speed of the magnetizing device 3 is set to, for example, 30 mm / sec, and the ascending / descending stroke of the magnetizing device 3 is, for example, 30 mm.
The magnetizing device 3 moves up and down within the range of 30 mm.

Further, when changing the forward direction of the self-propelled trolley 2 moving forward, by operating the remote controller 11, the semi-automatic fluorescent magnetic particle flaw detector 1 can be controlled from a distant position, and the operation can be performed. It will be very easy.

The present invention is not limited to the embodiments of the present invention described above, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the case where the image capturing device 6, the display device 7, the distance measuring device 8 and the recording device 9 are provided has been described, but they may be omitted if necessary. Further, the case where the remote control device 11 is used for remote control has been described, but this can be omitted if necessary.

[0060]

As is clear from the above description, according to the semi-automatic fluorescent magnetic particle flaw detector of the invention of claim 1, all the equipment necessary for inspecting the welding defect of the welding bead is mounted on the self-propelled carriage. Since it can be moved by moving it, it is not necessary for a worker to carry these necessary devices, and
It is possible to automatically perform the injection work of the magnetic powder liquid, the excitation work by the magnetizing device, and the irradiation work of the ultraviolet rays from the ultraviolet irradiation lamp, and the workers who perform these works can be omitted. It is only necessary to visually check for the presence or absence of welding, which allows semi-automated welding inspection and allows one worker to perform the same inspection as before, thus improving work efficiency. .

According to the semi-automatic fluorescent magnetic particle flaw detector of the second aspect of the present invention, in addition to the above effect, the magnetic powder indicating pattern gathered in the welding crack of the welding bead emits fluorescence in addition to the irradiation of ultraviolet rays. Since it can be taken with a camera and the contents can be displayed on the screen of the display, the worker can see the magnetic powder fluoresce through the display, and the worker bends down as before. Since it is not necessary to directly observe that the magnetic powder indicating pattern gathered in the welding crack of the welding bead emits fluorescence, the worker can easily perform the welding inspection and reduce the fatigue of the work.

Further, in the case of the structure of claim 3, it is possible to measure the movement distance from the arbitrary start position of the semi-automatic fluorescent magnetic particle flaw detector, and it is necessary to measure the movement distance from the start position by manual work. It is possible to record the welding defect position objectively and accurately.

Further, in the case of the structure of claim 4, since the moving distance from the arbitrary start position of the semi-automatic fluorescent magnetic particle flaw detector can be displayed together with the display of the contents photographed by the photographing device. It is possible to accurately guide the welding defect position from an arbitrary starting position of the semi-automatic fluorescent magnetic particle flaw detector.

Further, in the case of the structure of claim 5, it is possible to record the state of the magnetic powder indicating pattern formed on the welding defect portion within the effective flaw detection area on the welding bead which is excited and magnetized. The contents of the inspection can be reproduced and confirmed, and it is possible to eliminate inspection omissions.

Further, in the case of the structure of claim 6, since the information of the moving distance measured by the distance measuring device can be recorded together when recording the contents photographed by the photographing device,
It is possible to accurately guide a welding defect position from an arbitrary starting position of the semi-automatic fluorescent magnetic particle flaw detector when reproducing and recording the inspection result later.

Further, in the case of the structure of claim 7, the semi-automatic fluorescent magnetic particle flaw detector can be controlled from a remote place, and the operation thereof can be made very easy.
It has a very novel and beneficial effect.

[Brief description of drawings]

FIG. 1 is a side view of a semi-automatic fluorescent magnetic particle flaw detector according to an embodiment of the present invention.

FIG. 2 is a plan view of the semi-automatic fluorescent magnetic particle flaw detector according to the embodiment of the present invention.

FIG. 3 is a view on arrow AA of FIG.

FIG. 4 is a view taken in the direction of arrows BB in FIG. 1;

FIG. 5 is a block diagram of a control unit showing an embodiment of the present invention.

[Explanation of symbols]

 1 Semi-automatic fluorescent magnetic particle flaw detector 2 Self-propelled carriage 2a Magnetic shield 2b Front wheel 2c Rear wheel 2d Traveling motor 2e Timing belt 2f Steering motor 3 Magnetizing device 3a Support 3b Suspended shaft 3c Lifting motor 3d Transformer 3e Suspended Plate 3f Spring 4 Ultraviolet irradiation lamp 4a Inverter power supply 5 Magnetic powder injector 5a Magnetic powder injector mounting tool 5b Pressing piece 5c Solenoid valve 6 Photographer 6a Suspension material 7 Indicator 8 Distance measuring device 9 Recording device 10 Control unit 10a Power supply for driving 11 Remote control device 11a Cable a Magnetic powder

Claims (7)

[Claims] 1. A self-propelled carriage that moves along the welding bead is provided, and a magnetizing device that excites and magnetizes the flaw detection effective range on the welding bead surface, and an ultraviolet ray is applied to the excited and magnetized flaw detection effective range on the welding bead. An ultraviolet irradiation lamp for irradiating, a magnetic particle liquid injector that is installed in front of the magnetizing device and injects a magnetic particle liquid onto the welding bead, and a control unit that controls each of these devices, at least in the self-propelled carriage. A semi-automatic fluorescent magnet powder flaw detector that is equipped. 2. A self-propelled trolley that moves along the weld bead is provided, and a magnetizing device for exciting and magnetizing the flaw detection effective range on the weld bead surface, and an ultraviolet ray to the excited and magnetized flaw detection effective range on the weld bead. An ultraviolet irradiation lamp for irradiating, a magnetic particle liquid injector installed in front of the magnetizing device and for injecting a magnetic particle liquid on the welding bead, a camera for photographing the state of the magnetized magnetic powder on the welding bead, and the photographed A semi-automatic fluorescent magnetic particle flaw detector, characterized in that a display unit for displaying contents on a screen and a control unit for controlling each of these devices are mounted on at least the self-propelled carriage. 3. The semi-automatic fluorescent magnetic particle flaw detector according to claim 2, wherein the self-propelled carriage is equipped with a distance measuring device for measuring a moving distance. 4. The semi-automatic fluorescent magnetic particle flaw detector according to claim 2, wherein the information on the moving distance measured by the distance measuring device is also displayed when the contents photographed by the photographing device are displayed on the display device. 5. The semi-automatic fluorescent magnetic particle flaw detector according to claim 2, wherein the self-propelled carriage is equipped with a recording device for recording the contents photographed by the photographing device. 6. The semi-automatic fluorescent magnetic particle flaw detector according to claim 5, wherein the information on the moving distance measured by the distance measuring device is also recorded when the content photographed by the photographing device is recorded in the recording device. 7. The semi-automatic fluorescent magnetic particle flaw detector according to claim 1, further comprising a remote controller for adjusting the moving direction of the self-propelled carriage.