JP3448843B2 - Measuring device for unevenness of welded surface - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to measuring the depth of the undercut that occurs welds example steel, relates irregularities measuring apparatus of the weld surface to be applied to uneven measurements generated to the other weld surface <br/> .

[0002]

2. Description of the Related Art In the case of fillet welding, butt welding, etc. of steel, for example, there is a case where a so-called "undercut" is formed between the surface of the base material and the surface of the welded portion due to melting of the base material. . It is desirable to avoid this undercut as much as possible from the viewpoint of securing the strength of the welded structure. Under the recent standards, the occurrence of undercut exceeding 0.3 mm is strictly regulated as a welding defect. Has become.

Conventionally, in a complicated place such as a steel welding site of a large building, it is difficult to measure the depth of such a fine undercut. For example, a measuring gauge or various small diameter core wire materials such as mechanical pencils are used. In reality, it is possible to use only 0.3 mm cores or the like as primitive checking means for checking whether or not they are fitted into the undercut portion, or only measurement using a dial gauge. However, these methods have problems that they are inefficient and that it is difficult to measure with high precision.

On the other hand, a laser beam measuring device used for measuring surface roughness in the field of machining can detect irregularities with high accuracy, but the structure is large, so that it can be installed and installed at a construction site or the like. Since it is difficult to handle and the equipment cost is high, it is extremely difficult to apply it to undercut measurement.

[0005]

As described above, the unevenness measuring means for the surface of the welded portion using the dial gauge or the core wire has drawbacks in efficiency, measurement accuracy, etc. Although the device can detect irregularities with high accuracy, it has a large configuration and is difficult to handle and costly.

The present invention has been made in view of the above circumstances, and it is possible to measure the presence or absence of unevenness on the surface of a welded portion, the depth, the height, etc., by a simple operation, efficiently and highly accurately. Welding part that can be done at a relatively low cost
An object is to provide a surface unevenness measuring device .

[0007]

In order to achieve the above object, in the invention of claim 1, a small block-shaped measuring element which can be manually gripped and a mother of a welded object of the measuring element are provided.
Contact type with at least 3 points provided on the surface facing the material
Of the reference point measurement sensor and the sensors, which are provided separately from these sensors, and are separated from the reference point measurement sensor.
One point contact type distance measuring sensor for measuring unevenness arranged at a fixed position to measure the distance to the welded portion, and the measurement based on the reference distance and the reference facing angle information from the reference point measuring sensor The reference position specifying means for obtaining the current facing distance and the facing angle of the child, and the welding portion from the distance information by the sensor for measuring the unevenness based on the current position of the measuring element found by the reference position specifying means. by determining the distance of the measuring element for a particular position of br /> surface, the irregularities measuring means for determining the irregularities of the weld surface, if there is an abnormal value due to unevenness in the weld surfaces
Hearing buzzer or welding defect found by warning
Ink is sprayed on the marked area to create a visual
It has a marker that displays according to
Provided is a device for measuring the unevenness of the surface of a welded part.

According to the invention of claim 2, the unevenness of the welded portion is measured.
The tip of the contact-type distance measuring sensor for
Can be inserted into undercuts with a width of 0.3 mm or less
It is a small diameter core wire, and the undercut depth can be measured.
The unevenness measuring device for the surface of a welded part according to claim 1 is provided.
To serve.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the unevenness measuring apparatus for the surface of a welded part according to the present invention will be described below with reference to the drawings. This embodiment is suitable, for example, for measuring the undercut of a steel weld, but other weld surface
The same can be applied to the measurement of various irregularities in the above.

In this embodiment, a contact type sensor is applied. FIG. 1 is a perspective view showing a probe of an unevenness measuring device, and FIG. 2 is a plan view showing a sensor arrangement of the probe. FIG. 3 is a system configuration diagram showing the entire apparatus, and FIG. 4 is a flowchart showing an operation procedure.

As shown in FIG. 1, in the present embodiment, a small block-shaped measuring element main body 2 having a size that allows the measuring element 1 to be gripped and operated, and a reference position setting incorporated in the measuring element main body 2. ., And a sensor 4 for measuring the undercut depth, which is incorporated in the probe main body 2 in addition to these. The number of sensors may be three or more.

Each of the sensors 3 and 4 is a contact type distance sensor, and the distance sensor is composed of a sensor body and a contact. That is, each of the sensors 3 and 4 is arranged on one side surface (upper surface) of the tracing stylus body 2 and the sensor bodies 3a and 4a are arranged.
A pin-shaped contactor 6 is connected to the above via a spring 5. Each tip of the contactor 6 projects from the other side surface (lower surface) of the probe main body 2 so as to be able to move forward and backward, and is biased toward the projecting side by the elastic force of the spring 5.

In each of the sensors 3 and 4, when each contact 6 comes into contact with the surface of the steel material 7 as the object to be measured and the undercut 9 portion produced in the welded portion 8 or the like, a signal output corresponding to the amount of withdrawal thereof is output. Is performed. Then, the information is transmitted to a computer unit, which will be described later, and the posture and the undercut depth of the probe 1 are measured.

In the sensor 4 for measuring the undercut depth, the tip of the contact 6 is a core wire having a small diameter, and the undercut 9 portion generated in the welded portion 8 of the steel material 7 to be measured has a small width. It is designed to be easily inserted even in cases. Although not shown in the drawings, the probe 1 is provided with a marker such as an ink jet nozzle device for coloring, for example, at a site where an undercut defect or the like is found.

As shown in FIG. 2, each of the reference point measuring sensors 3 is arranged in a triangular apex.
A set of two points is formed in each of the vertical and horizontal directions, and the distance with respect to the surface of the steel material 7 and the inclination in each direction can be obtained by the retreat amount of each contactor 6. Further, the sensor 3 for measuring the undercut depth is arranged at a fixed position apart from the sensor 3 for measuring each reference point.

Here, the pitch between the sensors 3 and 4 is shown in FIG.
As shown in, when P1, P2, P3, and P4 are set, and the measurement heights of the sensors 3 and 4 are set to L0 for the sensor 4 and L1, L2, and L3 for the sensor 3, the following relationships are established.

For example, the left and right reference point measuring sensors 3 (L1) centering on the sensor 4 for measuring the undercut depth,
When 3 (L2) is tilted, the center position of the tip of the sensor 4 is shifted by the tilt. Therefore, the following right / left correction rate B is obtained.

[0018]

[Equation 1]

On the other hand, the apparent undercut depth A by the sensor 4 is

[Equation 2] Therefore, using the undercut amount A and the correction factor B, the true undercut depth A ′ is

[Equation 3] A ′ = A * B (3) Can be asked as

The method of this embodiment for performing the above calculation is
The procedure shown in FIG. 4 is performed using the system shown in FIG.

That is, as shown in FIG. 3, in this embodiment, the measurement information from each of the sensors 3 and 4 is amplified by the amplifier 10 and then input to the computer unit 11 and then input to the computer unit 11. Predetermined calculation and output are performed based on the data and the like. The computer unit 11 includes a converter, a computing unit, a display unit, etc., to which a data input unit 12, an output unit 13, etc. are connected.

Then, in the computing unit of the computer unit 11 or the like, a reference for determining the current facing distance and facing angle of the probe 1 to the steel material 7 based on the reference distance and the reference facing angle information from the reference point measuring sensor 3. Position specifying means is configured. Further, the separation distance of the tracing stylus 1 with respect to the position of the undercut 9 on the surface of the steel material 7 is obtained from the separation distance information by the sensor 4 for measuring the undercut depth with the current position of the tracing stylus 1 obtained by the reference position specifying means as a reference. As a result, a depth measuring unit (unevenness measuring unit) for measuring the depth of the undercut 9 is configured.
Numerical results are displayed by the output unit 13 by the calculation results by these means. Then, when it exceeds a preset specified value, it is output as a buzzer or a marker.

Regarding the depth measuring procedure, as shown in FIG. 4, when the sensors 3 and 4 of the probe 1 are started by switching on in a free state, first, the sensors 3 and 4 are
4 outputs are initialized to zero (step s
1). If the initialization is OK (step S2), then the front, rear, left and right coincidence of each sensor 3 is confirmed (steps S3, S4). After this confirmation, as shown in FIG.
Is mounted on the steel material 7 and the measurement of the welded portion 8 is started.

Signal data L0, L1, from each sensor 3
When L2 and L3 are loaded into the computer unit 11 (step S5), the above equations (1), (2), (3)
The depth of the undercut is calculated based on (step S6).

Then, the maximum value among the calculated values is stored (step S7), and it is determined whether the maximum value is within the allowable value (step S8). Then, if the undercut depth is within the allowable value by this determination, the measurement value is displayed on the data display section of the computer unit 11 together with the OK display (step S9), and the measurement of the site is completed. On the other hand, when the determination in step S8 is NO, that is, when the allowable value is exceeded, the measurement value is displayed along with the notification by the buzzer or the like in the output unit 13 (step S8).
10) When the necessity of marking is determined (step S11), marking is performed (step S12).

According to the present embodiment as described above, the tracing stylus 1
The operator grasps and approaches the welded portion 8 of the steel material 7, and the sensor for setting the reference position and the sensor 4 for measuring the undercut depth are brought into contact with the steel material 7 and moved. The depth of can be measured easily and with high accuracy. In this case, the undercut amount can be easily confirmed by displaying the measured value, and if there is an abnormal value, a warning or display can be performed by an auditory action of a buzzer or a visual action of marking, if necessary.

Moreover, highly accurate measurement values can be obtained by data acquisition and calculations based on them, and high reliability for welding evaluation can be secured. Further, the work is simple and the operation efficiency is good, and it can be performed at a low cost as compared with a conventional large-scale laser device. Further, since it can be operated while being carried, there is no need to install it.

In addition to the above-mentioned measurement of the undercut depth of the welded portion, the present invention also uses the overlap of the welded portion ,
It can also be applied to the presence / absence of irregularities and the measurement of depth, height, and the like. Even in this case, the measurement can be performed efficiently and with high precision by a simple operation, and it is possible to realize the implementation at a relatively low cost.

Further, by increasing the sensitivity levels of the sensors 3 and 4, it is possible to measure a wide range from relatively large unevenness to minute unevenness.

[0030]

As detailed above, according to the present invention, soluble according to the present invention
According to the unevenness measuring device at the contact portion, the presence or absence of unevenness on the surface of the welded portion, the depth, the height, etc. can be measured easily and efficiently with a simple operation, and at a relatively low cost. It is possible to achieve a great effect in practical use.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

Bottom view of the sensor arrangement in Figure 2 before Symbol embodiment.

FIG. 3 is a system configuration diagram in the one embodiment .

FIG. 4 is a flowchart showing a work procedure in the one embodiment .

[Explanation of symbols]

1 probe 2 Measuring element body 3 sensors 4 sensors 5 springs 6 contacts 7 Steel 8 welds 9 undercut 10 amplifiers 11 computer unit 12 Data input section 13 Output section

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mika Ito, 405, Matsuhidai, Matsudo-shi, Chiba Komai Iron Works Co., Ltd. Tokyo factory (56) Reference JP-A-9-61120 (JP, A) JP-A-9-178418 (JP, A) JP 59-136606 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01B 5/00-7/34 G01B 11/00-11/30 G01B 21 / 00-21/32

Claims (2)

(57) [Claims] 1. A small blower which can be manually held by a user.
Hook-shaped probe, a contact-type reference point measuring sensor of at least three points provided on the surface of the probe facing the base material of the welded object, and the probe provided separately from these sensors. At a fixed position away from the reference point measurement sensor.
A contact-type distance measuring sensor for measuring unevenness, which is arranged to measure the distance to the welding portion, and the current of the probe based on the reference distance and the reference facing angle information from the reference point measuring sensor. And a reference position specifying means for determining the facing distance and the facing angle, and the specific position of the weld surface from the distance information by the sensor for measuring the unevenness with reference to the current position of the probe obtained by the reference position specifying means. by determining the distance of the measuring element for a bumpy measuring means for determining the irregularities of the weld surface, the auditory effect when there is an abnormal value due to unevenness in the weld surfaces
Therefore, a warning buzzer or a part where a welding defect is found
Ink is ejected to the
Welding characterized by having a marker for displaying
Measuring device for uneven surface. 2. A contact-type distance measurement for measuring the unevenness of the welded portion.
The tip of the sensor is 0.3mm or less that can occur in the weld
It is a small diameter core wire that can be inserted into the undercut of the width of
The method according to claim 1, wherein the depth of the undercut is measured.
An unevenness measuring device for the surface of the welded part.