JPH0234609Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a detector scanning device that scans a detector such as an ultrasonic probe over an object to be detected.

[Conventional technology]

Generally, when detecting welds between flat plates or between pipes, it is necessary to use a means to scan a detector such as an ultrasonic probe in the vicinity of each weld. As a means for scanning the detector, a detector scanning device as shown in FIGS. 1a and 1b is implemented. In the figure, 1 is a flat plate on which a welded part is formed, 2 is a linear rail fixedly placed on the flat plate 1 near the welded part, and 3 is provided movably along the rail 2. A base, 4 is a bar-shaped moving body provided on the base 3 so as to be movable in a direction perpendicular to the direction of the rail 2, and 5 is an ultrasonic probe which is a detector attached to the tip of the moving body 4. , the base 3 and the movable body 4 move in the directions of the solid line arrow and the broken line arrow in the same figure, respectively, so that the deep probe 5 scans the vicinity of the weld on the flat plate 1 to perform flaw detection of the weld. .

Next, in FIG. 1b, 6 is a pipe in which a welded part is formed, 7 is a ring-shaped rail fixedly wound around the pipe 6 near the welded part, and 8 is a ring-shaped rail that is movable along the rail 7. 9 is a bar-shaped moving body provided on the base 8 in a direction perpendicular to the direction of the rail 7; 10 is an ultrasonic probe that is a detector attached to the tip of the moving body 9; , the base 8 and the movable body 9 are respectively indicated by the dashed line arrow and 2 in the figure.
By moving in the direction of the dotted chain arrow, probe 1
0 is scanned near the welded portion on the surface of the tube 6 to detect flaws in the welded portion.

[The problem that the idea attempts to solve]

In the conventional detector scanning device, the rails 2 and 7 are fixed to the objects to be detected such as the flat plate 1 and the pipe 6, and the detector is scanned. In addition, even if the pipe device is the same, if the pipe diameter differs, the device must have a rail corresponding to each pipe diameter, which has the disadvantage of lacking in versatility.

In the flat plate detector scanning device shown in FIG. By making it movable in a direction perpendicular to the respective movement directions of the detector, it becomes possible to fix the detector to the tube 6 and scan a portion of the tube 6 with the detector.

However, in the case of the above-mentioned scanning device, since both ends of the rail 2 are simply fixed to the detected object, the height between the detected surface of the detected object and the rail depends on the diameter of the tubular detected object. This results in a difference in the dimensions, which may result in a situation where the device cannot be operated stably.

In particular, for a detected object having a complicated three-dimensional curved surface having a curved surface or unevenness, it is not easy to maintain a substantially constant distance from the detected surface.

The present invention was developed with these problems in mind, and its purpose is to detect not only planar objects but also objects with circumferential surfaces and three-dimensional curved surfaces. It is an object of the present invention to provide a detector scanning device that can be easily fixed to an object to be detected and can keep the distance between the rail and the surface to be detected substantially constant.

[Means to solve the problem]

In order to achieve the above object, the detector scanning device of the present invention is provided with a base that is movable along a rail in the left and right direction installed on the detected object, and a base that is perpendicular to the direction of the rail. A movable body is provided so as to be movable in a direction, a detector for scanning the object to be detected is attached to an end of the movable body, and the height of the movable body is freely adjustable at four positions in the front and back on both sides of the central part of the rail. an adjusting body for temporarily fixing the rail, which has a magnetic attraction surface for the detected object that is supported and can freely rotate in three dimensions, and four adjusting bodies that are attached to the front and back of both ends of the rail so that their rotational positions can be freely adjusted. a holder supported between the tips of the two arms at both ends of the rail, and a holder supported three-dimensionally rotatably at both ends of the holder and placed on the detected object. The present invention is characterized by comprising an electromagnet that fixes the rail by adsorption.

[Effect]

The rail can be temporarily fixed by adsorbing the magnet attraction surfaces of each of the four adjusting bodies supported at the center of the rail onto the object to be detected.
The distance between the rail and the object to be detected can be adjusted by adjusting the height of the adjustment body, and after adjusting the rotation of the four arms at both ends of the rail to attract each electromagnet onto the object to be detected, each arm By fixing the rotational position of the rail, the rail can be reliably fixed on the object to be detected.

In this case, the adjustment body has a reference in the height direction of the rail, and by adjusting the adjustment body when temporarily fixing the rail, even when the body to be detected has a complex three-dimensional curved surface, the body to be detected and the rail can be adjusted. It is possible to keep the interval almost constant at all times.

〔Example〕

Next, this invention will be explained in detail with reference to the drawings from FIG. 2 onwards showing one embodiment applied to a flaw detection system for detecting flaws in welded parts.

In FIGS. 2 to 4, reference numeral 11 indicates a first rail in the left and right direction in which grooves 11' are formed on both the front and rear sides, and 12 is provided on the front and rear surfaces of the left and right ends of the first rail 11. 14 are two reinforcing plates each having a U-shaped cross section and are disposed between the front and rear mounting plates 12 on the lower side of the rail 11. These arms are provided on the outside of the mounting plate 12 so that their rotational positions can be adjusted freely, and bolts 17 are attached to fixed knobs 16 that contact one end of each arm 15 from the inside of both reinforcing plates 14. 12 and arm 15, and the arm 15 is screwed together with the bolt 1.
The arm 15 is rotatably supported by the arm 15, and the rotational position of the arm 15 is fixed by tightening the fixing knob 16. Reference numeral 18 denotes a holder in the front-rear direction that is fixed between the other ends of the front and rear arms 15 at the left and right ends of the rail 11, respectively.
A support pipe 19 is fixed on the same straight line to the front end and the rear end of the support pipe 19, respectively.

As shown in FIG. 3, 20 is a spherical rod-end bearing attached to the end face of each support pipe 19 with bolts 21, and 22 is an electromagnet attached to each bearing 20. , an electromagnet 22 is supported to be rotatable around the axis of the bolt 21 along the spherical surface of the bearing 20 and swingable in the axial direction of the bolt 21, and each electromagnet 22 is connected to the bearing 20, the bolt 21, and the support pipe 19, respectively. It is rotatably supported three-dimensionally at both ends of the holding body 18 via. This electromagnet 22 can be switched between an adsorption state and an adsorption release state by switching a knob 22' shown in FIG.

Reference numeral 23 indicates four mounting bodies each having an L-shaped cross section and are fixed to the front and rear sides of the central portion of the rail 11 with bolts 24 so as to be height adjustable; 25 indicates each mounting body 23;
4 link balls each attached to
Reference numeral 26 indicates four adjustment body bodies rotatably fitted to each link ball 25, and 27 indicates each main body 26.
Each mounting body 23, each link ball 25, each main body 26, and each magnet 27 constitute four adjustment bodies 28, and each adjustment body 28 adjusts the distance between the detected object and the rail 11 during detection.

29 is a rack disposed on the first rail 11 in the same direction as the rail 11 and fixed with bolts 30; 31 is a first moving plate placed on the first rail 11; 32 is a first moving plate. A first pulse motor (hereinafter referred to as a pulse motor) is attached to the right end on the top of 31, a gear case 33 is attached to the approximate center of the first movable plate 31, and 34 are the left, right, and upper parts of the case 33. , 4 bearings buried in each side of the bottom, 35 has both bearings 3 on the left and right on both ends.
4 is engaged with and connected to the rotating shaft of the motor 32 via the coupling body 36; 37 is a worm gear housed in the case 33 and pivotally attached to the connecting shaft 35;
38 was engaged with both upper and lower bearings 34 at both ends. A rotating shaft 39 is housed in the case 33 and is pivotally attached to the rotating shaft 38 and meshes with the worm gear 37. A wheel gear 40 is disposed between the first moving plate 31 and the rail 11 and is connected to the rotating shaft 38. connected shaft 4
a spur gear that is pivotally attached to 1 and meshes with rack 29;
42 covers the case 33 and connects the first gear part 4 with the gear case 33 and each gear 37, 39, 40.
2' is a gear cover, 43 is an encoder placed on the case 33, and 44 is a first moving plate 31.
Multiple adjustment knobs attached to the front side of the 4
Reference numeral 5 designates a plurality of guide rollers which are rotatably attached to both the front and rear ends of the first movable plate 31 and roll by fitting into the grooves 11' of the rail 11. 39 and spur gear 40 rotate, and as the spur gear 40 rotates, each roller 45 rolls in the groove 11', and the first moving plate 31 moves in the left-right direction along the rack 29 and rail 11.

50 is a second moving plate fixed to the first moving plate 31 via a support shaft 51, 52 is a second motor attached to the front end of the second moving plate 50, and 53 is a second moving plate fixed to the first moving plate 31 via a support shaft 51; A second gear section includes a worm gear connected to the rotating shaft of the two motors 52, a wheel gear meshing with the worm gear, and a spur gear interlocking with the wheel gear, and includes a gear case and a gear cover mounted on the second moving plate 50;
54' is an encoder placed on the gear case, both moving plates 31, 50, both gear parts 42',
53, both motors 32, 52 constitute a base 55.

Reference numeral 56 denotes a second movable body having a U-shaped cross section and having grooves 56' formed on both left and right sides, which is inserted between the two movable plates 31 and 50 so as to be movable in the front-back direction.
The rail 57 is mounted on the second rail 56.
A second rack is disposed in the same direction as that and is fixed by a bolt 58 and meshes with the spur gear of the gear portion 53, 59 is a plurality of adjustment knobs attached to the left side of the second moving plate 50, and 60 is a second rack. 2. The grooves 56' of the rail 56 are attached to both the left and right ends of the moving plate 50.
These are a plurality of guide rollers that are fitted into and rotated, and when the motor 52 operates, each of the gears of the gear section 53 rotates, and the spur gear rotates.
The second rail 56 moves in the front-back direction.

61 is a movable support body consisting of a base body 61a attached to the rear end of the second rail 56 and a movable body 61b attached to the base body 61a so as to be movable in the vertical direction; 62 is fixed to the movable body 61b with screws. A holding body with a U-shaped cross section, 63 a frame-shaped guide body,
Two fixtures 64 are fixed to the outside of both left and right side surfaces of the guide body 63 with screws and are rotatably held on the holding body 62 via a connecting body 65;
Reference numeral 66 denotes two mounting bodies fixed with screws to the inside of both the front and rear sides of the guide body 63, respectively; 67;
68 is a head body that is rotatably attached to both mounting bodies 66 via mounting shafts and has a through hole in the center, and 68 is fixed to the head body 67 with screws and has a through hole in the center. Motor fixing plate, 6
A third motor 9 is fixed to the motor fixing plate 68, and although not shown, a rotating body is rotatably fitted into the through holes of the head body 67 and the motor fixing plate 68 via bearings. The motor 6 is inserted into a through hole vertically formed in the center of the rotating body.
The lower end of the rotating shaft 69' of No. 9 is fitted, and the motor 69
The rotating body is rotated by the operation of the rotor.

70 is a rotary plate fixed to the rotating body with bolts; 71 is a head body 67 via a support rod 72;
A scanning guide plate 73 is fixed to the scanning guide plate 71 and has a notch formed by cutting out the central part, and reference numeral 73 indicates three pieces of scanning guide plate 73 attached to the left end center, the right front side, and the right rear side of the lower surface of the scanning guide plate 71. It is a stroke bearing, and each bearing 73 rolls on the detected object during scanning. Reference numeral 74 indicates a probe mounting body that is fitted into the notch of the scanning guide plate 71 and is fixed to the rotary plate 70 via a support rod 75; 76 is a probe mounting body 7;
This is a bevel probe which is a detector consisting of an ultrasonic probe attached to the center of the probe 76.
Similarly, a vertical probe, which is a detector made of an ultrasonic probe, is also attached to the front end of the probe attachment body 74. Note that 77 and 78 are a power cord and a connection line, respectively, and 79 is a connector.

For example, as shown in FIG. Loosen the magnet 2 of each adjusting body 28, install the detector scanning device near the part of the workpiece A to be inspected for flaws, and
After the first rail 11 is temporarily fixed by adsorption to the welded object A, each electromagnet 22 is brought into contact with the welded object A, and the knob 22' is switched to close each electromagnet 22.
are attracted to the object to be welded, each fixing knob 16 is tightened to fix the rotational position of each arm 15, and the first rail 11 is fixed.

Next, when the first rail 11 is fixed, the movable body 61b moves up or down, the probe 76 also moves up or down, and each stroke bearing 73 comes into contact with the workpiece A for flaw detection. By entering the standby state and driving both motors 32 and 52, both motors 3
The base 55 and the second rail 56 move as shown by the solid line arrow and the broken line arrow in FIG.
is scanned over the workpiece A to detect flaws in the welded portion.

Here, when the rail 11 is temporarily fixed by each adjustment body 28, the handle 23 of each adjustment body 28 is attached to the rail 11.
By adjusting the height, it is possible to adjust the distance between the detected surface and the rail 11 to be substantially constant even for a welded object having a curved surface as shown in FIGS. 5b to 5e.

In addition, since each electromagnet 22 is attached to the arm 15 so as to be rotatable in three-dimensional space, the surface of the detected object may be complicated, such as a curved surface or an uneven surface, as shown in FIGS. 5b to 5e. Even if the surface is a three-dimensional curved surface, the first rail 11 can be attached to a desired position and the probe 76 can be easily scanned in the same manner as described above.

Note that the detector may be a detector other than the probe 76, and the object to be detected is not limited to the object to be welded.

[Effect of idea]

Since this invention is configured as described above, it produces the effects described below.

Since the device can be temporarily fixed on the object to be detected using adjustment bodies supported at four locations in the front and back on both sides of the center of the rail, the scanning position of the detector attached to the rail via the base and movable body can be easily and quickly adjusted. Can be set to .

The magnetic adsorption surface of each adjustment body and each electromagnet for fixing the rail supported by the arms at both ends of the rail are each rotatable in three dimensions, so it has not only a flat surface but also a circumferential surface and a complex three-dimensional curved surface. The device can be attached stably and reliably to the object to be detected, and the height of the rail can be adjusted using the height-adjustable adjustment body, so the distance between the object to be detected and the rail is always maintained. It can be kept almost constant.

As a result, it is possible to provide a detector scanning device that can be easily set up without being limited in its installation surface relative to the object to be detected.

[Brief explanation of the drawing]

1A and 1B are perspective views of conventional detector scanning devices, FIG. 2 and the following drawings show an embodiment of the detector scanning device of this invention, FIG. 2 is a plan view, and FIG. Right side view, Figure 4 is a front view, Figures 5 a to e
is an operation explanatory diagram. 11...First rail, 15...Arm, 18...
... Holding body, 22 ... Electromagnet, 55 ... Base, 56
...Second rail, 76...Probe.

Claims (1)

[Claims for Utility Model Registration] A base is provided so as to be movable along the left and right rails installed on the detected object, and a movable body is provided on the base so as to be movable in a direction perpendicular to the direction of the rails. , a detector scanning device in which a detector for scanning the object to be detected is attached to an end of the moving body; an adjusting body for temporarily fixing the rail, which has a magnetic adsorption surface to the detected object that can be freely rotated; 2 at both ends of the rail
a holder supported between the tips of the two arms; and an electromagnet that is three-dimensionally rotatably supported at both ends of the holder and adsorbs onto the object to be detected to fix the rail. Detector scanning device equipped.