JPH0220692Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a probe tracking mechanism used for ultrasonic flaw detection of square billets.

As a conventional probe tracking mechanism for billet flaw detection, there is one shown in FIG. 1, for example. FIG. 1 is a perspective view illustrating a probe tracking mechanism for billet flaw detection that has been disclosed by the applicant of the present invention (Utility Model Registration No. 1477605) and is widely used. In the figure, the specimen 1 is conveyed in the direction of arrow A in the figure by a V roller conveyor (not shown). When the tip of the test material 1 enters the flaw detection position, the saddle-shaped head 2 is pressed against the test material 1 from above the test material 1 by the operation of a link mechanism, which will be described later, and is attached to the saddle-shaped head 2. A plurality of probes 3a, 3b...
Flaw detection is performed by maintaining a constant distance from the flaw detection surface of the material 1 to be inspected. In the perspective view of FIG. 1, a plurality of probes 3a', 3b', . . . are also attached to the opposite side of the saddle type head, but these probes are not shown. The saddle-shaped head 2 has an entry side, an exit side 4, 4',
5 and 5' flat rollers are arranged so that these flat rollers come into contact with the flaw detection surface of the specimen 1 and guide it toward the saddle-shaped head 2 and the specimen 1.

One end of the two arms 6, 6' is attached to a spherical shaft on a support shaft protruding from both sides of the saddle-shaped head 2 as a flexible pressing mechanism for pressing the saddle-shaped head 2 against the flaw detection surface of the test material 1. Connected via swivel bearings 7, 7' such as seat bearings,
The other end of the arm is similarly connected to support shafts 10, 10' protruding from both sides of the shaft fitting 9 via universal bearings 8, 8'. Further, the shaft fitting 9 is rotatably supported by a shaft 12 extending from the lower end of the fixed frame 11.

The fixed frame is formed of, for example, a concave shaped steel into a substantially inverted L-shape, and is fixed to a support arm 13 such as a shaped steel above the conveyance line of the billet 1, and the upper protruding end 11' and the arm 6 , 6' is equipped with a pneumatic cylinder 14 as a pressing mechanism, and a shaft 16 is mounted on the piston rod tip 15 of the cylinder, which is further connected to the arms 6, 6'. At the upper end part 14' of the cylinder, the upper end part of the cylinder 14 is engaged with a shaft 17 which is supported in the upper protruding end part 11' of the fixed frame 11, and the upper end part of the cylinder 14 is engaged with the shaft 17, which is mounted on the upper protruding end part 11' of the fixed frame 11. The coupling part, the engagement part between the rod tip and the shaft, and the shaft frame engagement part between the two arms 6, 6' and the shaft are respectively connected to swivel bearings 18, 19, 20,
They are joined at 20'.

In order to explain the operation of the conventional probe tracking mechanism with the above configuration, a skeleton of this mechanism is shown in FIG. The reference numerals of each part in FIG. 2 are the same as those in FIG. 1. As shown in Fig. 2, since a swivel bearing such as a spherical seat bearing is interposed in each member connection part that makes up the mechanism, it has a degree of freedom in the direction of the arrow shown in Figs. 1 and 2. Therefore, it is possible to follow all bending, twisting, conveyance movement, etc. of the billet.To be more specific, arrows 21 and 22 are used for vertical bending and vertical conveyance vibration, and arrows 21 and 22 are used for left-right bending and left-right conveyance vibration. The degrees of freedom shown by arrows 23 and 24 and the degree of freedom shown by arrow 25 act in response to twisting, and a pressing mechanism consisting of a pneumatic cylinder or the like acts in response to transport impact.

As mentioned above, the conventional billet probe tracking mechanism disclosed by the applicant is a mechanism that has excellent followability against bending, twisting, conveyance vibration, and shock, which are impossible for billet flaw detection, and is therefore used in many devices in reality. It has been adopted and is currently in production.

However, in such a conventional probe tracking mechanism, the saddle-shaped head is located above the test material as shown in Figure 1, and the entrance of the test material tip is separately prepared. After detection by the detector, the saddle type head is lowered and brought into contact with the testing surface of the material to be inspected to initiate flaw detection, so if the cross-sectional dimensions of the material to be tested are Large test material 1
When changing from 1' to a small specimen 1', the amount of descent of the saddle type head from the rising standby position to the inspection surface of the specimen changes significantly, so the descending time of the saddle type head changes and the flaw detection at the tip of the specimen There is a problem that the disabled area cannot be localized, and furthermore, the support arm 1 shown in Fig.
In some cases, it was necessary to add a height adjustment mechanism between the fixed frame 11 and the fixed frame 11.

The present invention was developed by focusing on these conventional problems.The head is brought into contact with the testing surface of the material to be tested from below, and the head is brought into contact with the surface of the material to be tested from below. The object of the present invention is to provide a probe tracking mechanism for billet flaw detection that solves the above problems by keeping the operation time constant.

The probe tracking mechanism for billet flaw detection of the present invention connects one end of a pair of arms via a swivel bearing to a support shaft protruding on both sides of a V-shaped head on which a probe is attached, and A shaft fitting is connected between the other ends via a swivel bearing, and the pair of arms, the V-shaped head, and the shaft fitting are assembled into a frame shape, and a billet conveying line is attached above the billet conveying line in the center of the shaft fitting. A shaft hanging from a fixed frame fixed to a supporting arm of the frame is rotatably supported, and the frame-like structure is horizontally swingably supported by the fixed frame. A pressure cylinder is pivotally mounted, and the tip of the piston rod of the cylinder is connected to a shaft installed between the longitudinal center portions of the pair of arms via a swivel bearing, respectively, and the biasing force of the cylinder is Accordingly, the V-shaped head is brought into contact with the lower surface of the specimen.

The present invention will be explained below based on the drawings.

FIG. 4 is a diagram showing an embodiment of the present invention. In FIG. 4, the same reference numerals as in FIG. 1 indicate the same or corresponding parts.

In Fig. 4, flat rollers 4, 4' and 5, 5' arranged at the front and rear of the V-shaped head 2 are brought into contact with the lower slope of the specimen 1, and mounted on both slopes of the V-shaped head 2. Flaw detection is performed using the probes 3a, 3b, . . . .

Support shafts protruding from both ends of the V-shaped head 2 are connected to one ends of two arms 6, 6' via universal bearings 7, 7' such as spherical coordinate axes. two arms 6,
The other end portion 6' is similarly connected to support shafts 10, 10' protruding from both sides of the shaft fitting 9 via swivel bearings 8, 8'. Further, the shaft fitting 9 is rotatably supported by a shaft 12 extending from the lower end of the fixed frame 11. Fixed frame 11
is formed into a substantially inverted L-shape similar to the conventional device shown in FIG. , 6' between approximately the center of the V-shaped head 2
A pneumatic cylinder 14 that can be operated by pulling is installed in order to evacuate the specimen 1 below the specimen 1.
A shaft 16 is mounted on the piston rod tip 15 of the cylinder 14, and the shaft 16 is in turn mounted on the arms 6, 6'. The engagement portion between the upper end of the cylinder 14 and the shaft 17, the engagement portion between the rod tip 15 and the shaft 16, and the shaft frame engagement portion between the shaft 16 and the two arms 6, 6' are as follows:
They are connected by swivel bearings 18, 19, 20, 20', respectively.

The two arms 6 and 6' are provided to prevent the piston rod tip 15 from interfering with the upper corner of the specimen 1 when the V-shaped head 2 is retracted downward from the specimen 1. , has a dogleg shape with the swivel bearings 20, 20' at the center.

As described above, this embodiment is based on the conventional probe tracking mechanism for billet flaw detection, and the direction of the head and the two arms 6 are adjusted so that the V-shaped head 1 is operated from below the subject 1. , 6' has been changed to a dogleg shape, and a swivel bearing such as a spherical seat bearing is installed at each component connection part, so it is free from billet bending, torsion, and transport vibration, similar to conventional equipment. etc.,
All can be followed freely. In other words, the degrees of freedom shown by arrows 21 and 22 are used for vertical bending and vertical conveyance vibration, and the degrees of freedom shown by arrows 23 and 22 are used for left-right bending and left-right conveyance vibration.
24 and 26 degrees of freedom, and arrow 2 for torsion.
Five degrees of freedom work.

Further, the transport impact of the specimen 1 is absorbed by the pneumatic cylinder.

As is clear from the above description, according to the present invention, one end of the pair of arms is connected to the support shafts protruding on both sides of the V-shaped head on which the probe is mounted, through respective swivel bearings, and A shaft fitting is connected between the other ends of the arms through respective swivel bearings, and the pair of arms, the V-shaped head, and the shaft fitting are assembled into a frame shape, and a billet conveying line is provided in the center of the shaft fitting. A shaft hanging from a fixed frame fixed to an upper support arm is rotatably supported, and the frame-like structure is horizontally swingably supported by the fixed frame. A pneumatic cylinder is pivotally mounted, and the piston rod tip of the cylinder is
The pair of arms are connected to a shaft installed between the longitudinal center portions of the pair of arms via a respective swivel bearing, and the V-shaped head is pressed against the lower surface of the material to be inspected by the biasing force of the cylinder. Since they are brought into contact with each other, the following effects can be obtained.

The supporting mechanism of the V-shaped head consists of a single frame-shaped structure connected by a swivel bearing as in the past, and is capable of following the vertical, horizontal, and rotational displacement of the specimen. V from the bottom
Because the V-shaped head is operated, even if the dimensions of the test material change, the distance from the descending standby position to the test surface of the test material remains the same, and the operating time until the V-shaped head contacts the test material remains constant. As a result, the undetectable area at the tip of the test material can be minimized.

Since the main parts of the mechanism, such as the link mechanism and pneumatic cylinder that operate the V-shaped head, are located above the specimen, there is no risk of contamination due to scale, etc. attached to the surface of the specimen, or if the V-shaped head is attached to the V-shaped head. The mechanism is not contaminated by water as a couplant overflowing from the probe portion, and the mechanism can be kept in good condition at all times, resulting in fewer breakdowns and easy maintenance.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional billet flaw detection probe tracking mechanism, Fig. 2 is a skeleton diagram of a conventional billet flaw detection probe, and Fig. 3 shows the dimensions of the test material and the amount of saddle-shaped head descent. FIG. 4 is a perspective view of an embodiment of the present invention. 1... Test material, 2... Head, 6, 6'... Arm,
9...Shaft fitting, 10,10'...Spindle, 11...
Fixed frame, 12, 16... Axis, 13... Support arm, 1
4... Pneumatic cylinder, 15... Piston rod tip, 7, 7', 8, 8', 18, 19, 20, 2
0'...Swivel bearing.

Claims (1)

[Scope of utility model registration request] One end of a pair of arms is connected via a swivel bearing to a support shaft protruding on both sides of the V-shaped head on which the probe is attached, and a shaft fitting is connected between the other ends of these arms via a swivel bearing. The pair of arms, the V-shaped head, and the shaft fitting are assembled into a frame shape, and a shaft is attached to the center of the shaft fitting, which is suspended from a fixed frame fixed to the support arm above the billet conveyance line. The frame-like structure is rotatably supported on a fixed frame so as to be horizontally swingable, and a pneumatic cylinder is pivotally connected to the upper end of the fixed frame via a swivel bearing, and a piston rod tip of the cylinder is mounted on the fixed frame. , the V-shaped head is connected to a shaft installed between the central portions of the pair of arms in the longitudinal direction via a free bearing, and the V-shaped head is attached to the lower surface of the material to be inspected by the biasing force of the cylinder. A probe tracking mechanism for billet flaw detection, characterized in that the probe is brought into contact with the probe.