JPH0633363Y2 - Ultrasonic plate thickness measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an ultrasonic plate thickness measuring apparatus capable of continuously measuring the plate thickness of a plate material by ultrasonic waves over the entire flat area.

[Prior Art] A conventional ultrasonic plate thickness measuring device for a plate material is that the probe mounted on the carriage is moved to a measurement point, and the probe is pressed against the surface of the object to be measured at the measurement point. Was to do. Therefore, only point measurement was possible, and it was linear measurement. Furthermore, if the pitch of the measuring points is made small, the measuring time will take a great deal of time, so in the case of the bottom plate of an oil tank, for example, it is usually done at a considerably large pitch such as every 100 mm or 30 mm. There was a great risk of overlooking.

[Problems to be Solved by the Invention] In order to solve the above problems, the present invention provides an ultrasonic plate thickness measuring device capable of continuously and planarly measuring the plate thickness of a plate material. With the goal.

[Means for Solving the Problems] An ultrasonic plate thickness measuring apparatus according to the present invention comprises a carriage mechanism and a probe scanning mechanism having a tire type ultrasonic probe mounted on the carriage mechanism. The carriage mechanism is composed of two sets of an x-axis carriage and a y-axis carriage that are assembled so as to move relative to each other in the vertical direction and are movable in two axial directions of two orthogonal axes, and the probe scanning mechanism has a pitch. It is provided so as to move in a direction perpendicular to the moving direction of the moving y-axis carriage, and moves the probe in contact with the plate to be inspected when the probe is scanning, and separates from the plate to be inspected when not scanning. It is configured so as to rise.

[Operation] In the ultrasonic plate thickness measuring device according to the present invention, the probe is moved along the y-axis by the y-axis carriage that moves in the y-axis direction and the probe scanning mechanism that continuously moves in the x-axis direction. Move in the direction of a rectangular wave. Furthermore, the rectangular wave motion of this probe is
Instead of the y-axis carriage, an x-axis carriage is installed on the plate to be inspected, and the carriage is moved in the x-axis direction, and then the y-axis carriage and the probe scanning mechanism are operated again to continue in the x-axis direction. Can be made. As a result, the plate thickness of the plate to be inspected can be continuously and planarly measured over a wide range.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a plan view showing a carriage mechanism and a probe scanning mechanism, and FIG. 3 is a side view of the carriage mechanism.

As shown in these figures, in this embodiment, the orthogonal x
Probe scanning having a carriage mechanism 1 in which two sets of carriages 11 and 12 that move in the respective axial directions of the axis and the y-axis are incorporated, and a tire-type ultrasonic probe 2 equipped in the carriage mechanism 1. Mechanism 3
It is composed by.

The bogie mechanism 1 is composed of an x-axis bogie 11 and a y-axis bogie 12 provided so as to move up and down relatively to the x-axis bogie 11, and the y-axis bogie 12 is pitch-moved in the y-axis direction. It is like this.

The probe scanning mechanism 3 described above is provided on the side surface of the y-axis carriage 12 with x
It is mounted so as to move in the axial direction.

Further, the configuration of each part will be described in detail below.

First, in FIG. 1 and FIG. 2, the y-axis carriage 12 is installed on a plate 4 to be inspected by mounting a plurality of wheels 122 on a square carriage frame 121. Wheels 122 encoder 123
Harmonic drive mechanism 125 with attached y-axis motor 124
The axle 126 is rotated via.

Next, the x-axis carriage 11 has a square carriage frame 111 inserted in a square carriage frame 121 of the y-axis carriage 12,
A plurality of wheels 112 are attached to the carriage frame 111. The wheel 112 is driven by an x-axis motor 114 equipped with an encoder 113 via a harmonic drive mechanism 115, and its axle 116 is rotated.
Is rotated. Further, a table 117 is mounted on the bogie frame 111 of the x-axis bogie 11, and a plurality of guide rods 118 are vertically provided on the lower surface of the table 117. These guide rods 118 are provided on the side surface of the bogie frame 121 of the y-axis bogie 12. It is slidably fitted into a guide receiver 127 provided on the. Further, as shown in FIG. 3, an elevating shaft 119 is vertically provided at the center of the lower surface of the table 117, and the z-axis motor 131 of the elevating device 13 installed on the bogie frame 121 of the y-axis bogie 12 causes the worms 132a and Gear unit 132 consisting of worm wheel 132b and intermediate gear 1
33a, 133b, 133c, a screw shaft 133d and a screw shaft 133d are screwed together to move the lifting shaft 119 up and down via an intermediate gear device 133 that is a nut member 133e fixed to the lower end of the lifting shaft 119 to move the lifting shaft 119 up and down. The carriage 11 moves up and down relative to the y-axis carriage 12. Therefore, when the y-axis carriage 12 is on the plate 4 to be inspected as shown in FIG. 1, the wheels 112 of the x-axis carriage 11 are separated from the plate 4 to be inspected. A power supply device, a control device, a recorder and the like (not shown) are mounted on the table 117. In FIG. 2, 14 is a transformer.

Next, the probe 2 is formed in a tire shape as shown in FIG. 1, and is rotatably attached to a support member 31 biased toward the plate 4 to be inspected by a spring (not shown).

The probe scanning mechanism 3 mounts a screw shaft 32 extending in the x-axis direction on the side surface of the y-axis carriage 12, and attaches an upper rod 34 of the probe support member 31 to a nut member 33 screwed to the screw shaft 32. The nut member 33 is attached to the guide rail 35 provided in parallel with the screw shaft 32 while being attached so as to urge downward by a spring.
The guide rollers 36 are engaged with each other. Screw shaft
32 is rotated by a motor 38 with an encoder 37.
Further, the guide rail 35 has stepped portions at both ends at the position of the guide roller 36 in FIG. 2 as shown in FIG. 4, and when the guide roller 36 moves on the lower guide rail portion 35a, that is, when the probe When scanning the probe 2, the probe 2 is pressed against the plate 4 to be inspected and moves in the x-axis direction. On the other hand, when the probe 2 is not scanning, the guide roller 36 is mounted on the high-rank guide rail portion 35b, and the probe 2 is lifted from the plate 4 to be inspected and separated. In this state, the y-axis carriage 12 is moved along the y-axis. Move the pitch in the direction. In FIG. 2, 15 and 16 are limit switches for probe scanning emergency stop, and 17 is a guard plate.

Next, the operation of the apparatus of this embodiment configured as described above will be described.

First, the y-axis carriage 12 is installed on the plate 4 to be inspected as shown in FIG. In this case, the tire type probe 2 is pressed against the inspected plate 4 by a spring. Therefore, when the screw shaft 32 is rotated by the motor 38, the nut member 33 moves in the x-axis direction along the screw shaft 32, and the guide roller 36 moves on the lower guide rail portion 35a. Therefore, the probe 2 attached to the nut member 33 via the support member 31 moves in the x-axis direction, so that the plate thickness of the plate 4 to be inspected can be measured in that direction.

After scanning the probe 2 for a certain distance in the x-axis direction, the guide roller 36 is mounted on the higher guide rail portion 35b. Then, the probe 2 floats up and separates from the plate 4 to be inspected. Then, move the y-axis carriage 12 in the y-axis direction, for example
After moving the carriage 12 by 4 mm pitch and stopping the carriage 12, the probe 2 is again moved in the opposite direction of the x-axis to perform scanning. Then, the guide roller 36 is mounted on the high-order guide rail portion 35b to separate the probe 2 from the plate 4 to be inspected, and the y-axis carriage 12 is further moved in the y-axis direction by 4 mm.
Move the pitch.

By repeating the above operation, the probe 2 moves along the rectangular wave locus A as shown in FIG. Therefore, the plate thickness of the plate 4 to be inspected can be continuously measured in a plane. Moreover, since the pitch in the y-axis direction is small,
It is possible to measure the thickness reduction due to corrosion of the plate 4 to be inspected to a considerably small amount.

After the plate 4 to be inspected is scanned with a predetermined width in the x-axis direction and a certain length in the y-axis direction, the lifting device is moved.
Operate 13. Then, the rotation of the z-axis motor 131 causes the screw shaft 133d to rotate via the gear device 132 and the intermediate gear device 133, and the nut member 133e screwed to the screw shaft 133d is lowered, whereby the lifting shaft 119 is lowered. For this reason, table 117
Then, the x-axis carriage 11 descends, and the wheel 112 that has been lifted up to now comes into contact with the plate 4 to be inspected. When the x-axis carriage 11 is further lowered, the y-axis carriage 12 is lifted up by the guide rod 118 and the guide receiver 127, and the wheels 122 are separated from the plate 4 to be inspected. After that, the x-axis carriage 11 is moved by a certain distance in the x-axis direction, the x-axis carriage 11 is raised again and the y-axis carriage 12 is lowered by the operation opposite to the above, and the initial state is restored. Then, by moving the probe 2 again in the rectangular wave shape as described above, a locus B continuous in the x-axis direction can be obtained as shown in FIG.

Therefore, by such an operation, the plate thickness of the plate 4 to be inspected can be continuously measured in a plane over a considerably wide range.

In the above embodiment, the operation of the probe 2 during scanning and non-scanning is performed by the guide roller 36 of the probe supporting member 31 that engages with the stepped guide rails 35a and 35b. The operation can be performed by a cylinder device or the like.

[Effects of the Invention] As described above, according to the present invention, a bogie mechanism incorporated so as to vertically move two sets of bogies that move in two axial directions, and the bogie mechanism is equipped with the bogie mechanism. Since the probe can be moved in a planar rectangular wave shape by the probe scanning mechanism having the tire-type probe that moves in the direction perpendicular to the moving direction of the set of carriages, There is an effect that the ultrasonic plate thickness measurement can be continuously and highly accurately performed over the entire plane area.

[Brief description of drawings]

1 is a front view showing an embodiment of the present invention, FIG. 2 is a plan view showing a carriage mechanism and a probe scanning mechanism, FIG. 3 is a side view of the carriage mechanism, and FIG. 4 is a probe scanning mechanism. FIG. 5 is an explanatory view showing the relationship between the guide roller and the guide rail of the mechanism, and FIG. 5 is a trajectory diagram of the rectangular wave motion of the probe. 1 ... Bogie mechanism, 11 ... x-axis carriage 2 ... Probe, 12 ... y-axis carriage 3 ... Probe scanning mechanism, 13 ... Lifting device 4 ... Plate to be inspected

Front Page Continuation (72) Hideyuki Nakagawa Inventor Marunouchi 1-2-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Tube Co., Ltd. In-company (72) Inventor Toshiya Maekawa 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside Nihon Steel Pipe Co., Ltd. (56) Reference JP-A-60-58505 (JP, A) JP-A-61-137059 (JP) , A) Actual development Sho 49-24250 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A trolley mechanism, and a probe scanning mechanism having a tire-type ultrasonic probe mounted on the trolley mechanism,
The carriage mechanism is composed of two sets of carriages that are assembled so as to move up and down relatively and are movable in two axial directions of two orthogonal axes, and the probe scanning mechanism of the one set of carriages that moves in pitch. It is provided so as to move in the direction perpendicular to the moving direction,
An ultrasonic plate characterized in that the probe moves in contact with the plate to be inspected during scanning and floats away from the plate to be inspected at the moving end of the probe in non-scanning. Thickness measuring device.