KR101125216B1 - A welding test apparatus and welding test method the apparatus - Google Patents

Abstract

The present invention relates to a welding inspection apparatus, the configuration of the six electrode pins having a constant interval, the first voltmeter for measuring the voltage between two consecutive electrode pins, the voltage between the other two consecutive electrode pins A second voltmeter, a current source capable of selectively applying current between the electrode pins, a switch controlling an interruption of a circuit so that the current source selectively applies current between the electrode pins, and the two consecutive electrodes Determination unit for judging acceptance by comparing the result value obtained by substituting each resistance value between pins and two different electrode pins with a preset inspection pass value, and determining the result of the determination in the determination unit to the outside. A display unit to be displayed, a difference calculator which calculates a difference between an inspection pass value and a result value when the determination result of the determination unit is not satisfied; In terms of the value as a percentage it consists conversion unit such as a display to the outside. According to the present invention as described above, there is an advantage that can effectively determine the state of the welding operation.

Description

Welding test apparatus and welding test method using the same {A welding test apparatus and welding test method the apparatus}

The present invention relates to a welding inspection apparatus and a welding inspection method using the same, and more particularly, a welding inspection apparatus for inspecting the welding stability of the metal plate after welding, and using the same to determine the acceptance and rejection of the welding operation and to determine the additional work amount It relates to a welding inspection method for displaying.

After welding the metal material, it is important to evaluate the joint strength of the welded portion. Non-destructive testing of the weld strength of such welds, generally using four electrode pins, passing current through both ends, and measuring the electrical resistance of the welded portion using two electrode pins inside. Was measured.

However, the above-described prior art has the following problems.

Conventionally, the welded portion is inspected and the resistance of each non-welded portion is measured to test the weld strength. As such, the four electrode pins measure the welded portion once and the non-welded portion once to measure each other. It should be compared, and the difference in temperature and thickness due to the time difference occurs a problem that the measured value is not accurate.

In addition, there is a problem in that the measured value is not accurate because the gap between the electrode pins is not considered.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide a welding inspection apparatus capable of simultaneously measuring the resistance of the welded portion and the non-welded portion.

And, another object of the present invention is to provide a welding inspection apparatus that can equally adjust the interval between the electrode pins.

In addition, another object of the present invention is to provide a welding inspection method for determining the acceptance and rejection of the welding operation, and in case of failure, additionally displays the required amount of work to the outside.

According to a feature of the present invention for achieving the above object, the welding inspection apparatus according to the present invention, the first electrode pins are arranged at equal intervals in a linear form in order to contact the front end to the same surface to be measured, A second electrode pin, a third electrode pin, a fourth electrode pin, a fifth electrode pin, and a sixth electrode pin; A current source for applying a current between the electrode pins; A first voltmeter for measuring a voltage between the second electrode pin and the third electrode pin; A second voltmeter for measuring a voltage between the fourth electrode pin and the fifth electrode pin; A first switch selectively connecting one end of the current source to one of the first electrode pin and the third electrode pin; A second switch for selectively connecting the other end of the current source with one of the fourth electrode pin or the sixth electrode pin; The respective resistance values are calculated using the voltages measured by the first voltmeter and the second voltmeter, and the resultant value A is obtained by substituting the resistance value in a preset equation. A judging unit for judging whether the welding quality has passed or not according to whether the resultant value A is greater than or equal to the inspection pass value B compared with the value B; A display unit which displays the determination result of the determination unit to the outside; A difference calculation unit for calculating a difference value between the inspection pass value B and the result value A when the determination result is a failure; And a converting unit converting the difference value calculated by the difference calculating unit into a percentage of the inspection pass B value and displaying the difference to the outside.

In addition, the welding inspection method according to the present invention, in the welding inspection apparatus, the first step of contacting the welding portion of the object to be measured between the fourth electrode pin and the fifth electrode pin; A second step of applying a current to the first electrode pin and the sixth electrode pin; The resistance value is calculated by measuring the voltage between the second electrode pin and the third electrode pin, and the resistance value is calculated by measuring the voltage between the fourth electrode pin and the fifth electrode pin, and A = (( A third step of measuring the resultant A value by R2-R1) / R2) * 100; A determination step of comparing the result value A value of the third step with a preset inspection pass value B and determining whether the weld quality has passed according to whether the result value A value is equal to or greater than the inspection pass value B; A pass display step of notifying outside that pass is passed when A≥B as a result of the determination in the judging step; As a result of the determination in the determination step, in the case of A <B, a failure display step of notifying outside of failure; A calculation step of calculating a difference value C by C = B-A when A <B is determined in the determination step; A conversion step of calculating a value of C / B * 100 from the difference value C calculated in the calculation step; And an additional display step of displaying an additional amount of work by externally displaying the value calculated in the conversion step.

The welding inspection apparatus according to the present invention has the following effects.

By keeping the six electrode pins at regular intervals to measure the resistance of the welded portion and the non-welded portion at the same time, the resistance value is accurately measured without other variables, thereby increasing the reliability of the welding inspection apparatus of the present invention.

And, in consideration of the size of the welding portion, the electrode pin spacing can be adjusted, at this time, it is possible to adjust the spacing of the other electrode pins, so that the reliability of the present invention welding inspection apparatus is improved by not changing the measured value by other variables. It works.

In addition, in the present invention, when the welding operation is not successful, since the insufficient amount is converted into a numerical value (percentage) and displayed, there is an advantage that the operator can further determine the amount of further work. Therefore, there is an advantage that the work efficiency is doubled.

1 is a schematic view showing the configuration of a welding inspection apparatus according to the present invention.
2 and 3 is an operation process showing the operation of the welding inspection device of FIG.
Figure 4 is a schematic view showing another embodiment of a welding inspection apparatus according to the present invention.
5 and 6 is an operation process showing the operation process of the welding inspection device of FIG.
7 is a schematic view showing an example of use of the welding inspection device of FIG.
8 is a schematic view showing another example of use of the welding inspection device of FIG.
9 is a flowchart showing a part of the welding inspection operation according to the present invention.

Hereinafter, a preferred embodiment of a welding inspection apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

In the welding inspection apparatus according to the present invention, as shown in FIG. 1, a voltage between six electrode pins 10 having a constant interval and two consecutive electrode pins 10 among the electrode pins 10 is measured. Optionally between the first voltmeter 24 to measure, the second voltmeter 22 to measure the voltage between the other two consecutive electrode pins 10 of the electrode pin 10, and the electrode pin 10 It may be configured to include a current source 30 capable of applying a current to the current source, and the switch 40 for controlling the interruption so that the current source 30 can selectively apply the current between the electrode pin 10. .

First, the welding inspection apparatus of the present invention is provided with an electrode pin 10 in contact with the surface of the measurement object (M). The electrode pin 10 may be composed of six, as shown in Figure 1, may be configured to be arranged in a line with each other.

That is, as shown in FIG. 1, the electrode pin 10 may include a first electrode pin 12, a second electrode pin 13, a third electrode pin 14, a fourth electrode pin 15, and a third electrode pin 15. It may be divided into a five electrode pin 16 and a sixth electrode pin 17.

The electrode pin 10 is preferably composed of a conductor capable of flowing a current, for example, may be composed of a Kelvin Plunger Tip.

In addition, the electrode pins 10 may be configured to be spaced apart from each other at the same interval (S). When the resistance value is obtained by measuring the voltage between the respective electrode pins 10, the measured value between each electrode pin 10 is changed by the difference of the distance S between the electrode pins 10. This is to prevent the change.

In addition, it may be configured to adjust the interval (S) between the electrode pins (10). This is to adjust the interval between the electrode pins 10 according to the size of the welding portion (W), so that the welding portion (W) is all included between the electrode pins (10).

That is, as shown in FIG. 1, when the welding part W is not positioned between the electrode pins 10 and the electrode pin 10 contacts the welding part W, the voltage value is different. Because it is measured.

And the welding inspection apparatus of this invention is provided with the current source 30. The current source 30 serves to provide a power source to measure the voltage value between the electrode pins 10.

More specifically, as shown in FIG. 1, the current source 30 is formed between the first electrode pin 12, the third electrode pin 14, the fourth electrode pin 15, and the sixth electrode pin 17. It selectively serves to supply current.

And the voltmeter 20 is provided in the welding inspection apparatus which is this invention. The voltmeter 20 is provided between the electrode pins 10 to measure a voltage generated by the resistance of the measurement object M between the electrode pins 10.

The voltmeter 20 may be configured in two, as shown in FIG. 1. That is, the voltmeter 20 includes a first voltmeter 24 measuring the voltage V2 between the second electrode pin 13 and the third electrode pin 14, and the fourth electrode pin 15. ) And the second voltmeter 22 measuring the voltage V1 between the fifth electrode pin 16.

Moreover, the switch 40 is provided in the welding inspection apparatus of this invention. The switch 40 controls the current of the current source 30 to selectively flow between the respective electrode pins 10.

More specifically, as shown in FIG. 1, the switch 40 may be configured in two. That is, the switch 40 is divided into a first switch 42 and a second switch 44.

The first switch 42 controls the flow of current by connecting one end X of the current source 30 to one of the first electrode pin 12 or the third electrode pin 14. Do it. The second switch 44 controls the flow of current by connecting the other end Y of the current source 30 to any one of the fourth electrode pin 15 or the sixth electrode pin 17. Do it.

4, another embodiment of the welding inspection apparatus of the present invention will be described. The other embodiment shown in FIG. 4 is similar in basic construction to the welding inspection apparatus of FIG. 1, but has a different configuration. .

Hereinafter, the configuration of the switch will be described in detail. First, as shown in FIG. 4, a first switch 42 and a second switch 43 are provided.

The first switch 42 may connect one end X of the current source 30 to any one of the first electrode pin 12, the third electrode pin 14, or the fourth electrode pin 15. It is connected to control the flow of current. The second switch 44 controls the flow of current by connecting the other end Y of the current source 30 to one of the fourth electrode pin 15 or the sixth electrode pin 17. do.

The third switch 46 is further provided. The third switch 46 serves to adjust the measurement range of the second voltmeter 22.

That is, the third switch 46 is connected to one end of the second voltmeter 22 and the other end is selectively connected to any one of the third electrode pin 14 and the fourth electrode pin 15. Play a role.

Hereinafter, the operation of the welding inspection apparatus according to the present invention having the configuration as described above in detail.

First, as shown in FIG. 1, when the welded portion is to be inspected, the welding inspection apparatus of the present invention is brought into contact with the outer surface of the measurement object M to be inspected.

At this time, the welding portion (W) is positioned between the fourth electrode pin 15 and the fifth electrode pin 16 to make contact. The first switch 42 is in contact with the A position, and the second switch 44 is in contact with the D position.

Then, the current source 30 is operated to apply power to the circuit. Then, the voltage V1 between the fourth electrode pin 15 and the fifth electrode pin 16 for measuring the weld portion W is measured, and the second electrode pin 13 and the third electrode for measuring the non-contact portion are measured. The voltage V2 between the three electrode pins 14 is measured.

The resistance R1 measured by the voltage V1 between the fourth electrode pin 15 and the fifth electrode pin 16, and the second electrode pin 13 and the third electrode pin 14. Using the resistance R2 measured by the voltage V2 in between, the resultant value A is obtained by the following equation.

A = ((R2-R1) / R2) * 100

The resultant value A shown by the calculation using the above-described formula is compared with the preset test pass value B, and when A≥B, an indication of acceptance is shown, and when A <B, an indication of rejection is displayed.

On the other hand, in the welding inspection apparatus of the present invention, when the size of the weld portion W is to be measured, the welding inspection apparatus is brought into contact with the outer surface of the measurement object M. At this time, the portion that is determined as the welding portion (W) is brought into contact between the fourth electrode pin 15 and the fifth electrode pin 16.

The first switch 42 is in contact with the A position, and the second switch 44 is in contact with the D position. Then, the current source 30 is operated to apply power to the circuit.

Then, the voltage V1 between the fourth electrode pin 15 and the fifth electrode pin 16 for measuring the weld portion W is measured, and the second electrode pin 13 and the third electrode for measuring the non-contact portion are measured. The voltage V2 between the three electrode pins 14 is measured.

In this case, as shown in FIG. 8, when the fourth electrode pin 15 is positioned on the welding portion W, a resistance value between the fourth electrode pin 15 and the fifth electrode pin 16 is shown. (R1) is a relatively large value is measured. In other words, the resulting value A appears as a small value.

Then, the operator adjusts the welding inspection apparatus of the present invention, while slightly adjusting the interval (S) between each of the electrode pins (12, 13, 14, 15, 16, 17), and the fourth electrode pin (15) While measuring the resistance value R1 between the fifth electrode pins 16, the point where the resistance value R1 becomes the minimum is found.

Since the point at which the resistance value R1 becomes the minimum is the edge point of the welded portion W, the distance between these points is measured, and the resultant value A is obtained as described above, and the preset test pass value B By comparison, it is judged whether the welding quality is passed.

Meanwhile, in the welding inspection apparatus of the present invention, as shown in FIG. 7, the welding portion W is positioned between the second electrode pin 13 and the third electrode pin 14, and the first switch 42. ) May be in contact with A, and the second switch 44 may be in contact with C to be used as a welding inspection device composed of four electrode pins 10.

As shown in FIG. 1, when the first switch 42 is contacted to the A position, the second switch 44 is contacted to the D position, and when a current source is operated to apply power to the circuit, the first switch 42 is supplied from the current source. The current should be kept constant as it flows from the first electrode pin 12 to the sixth electrode pin 17, but the difference is shown as the intensity of the current gradually decreases.

To solve this problem, first, as shown in FIG. 2, the first switch 42 is contacted to the A position, and the second switch 44 is contacted to the C position. When the current source 30 is operated to apply power to the circuit, the current flows from the first electrode pin 12 to the fourth electrode pin 15 as shown in FIG. At 24, the voltage V2 is measured.

Meanwhile, as shown in FIG. 3, the first switch 42 is contacted to the B position, and the second switch 44 is contacted to the D position. When the current source 30 is operated to apply power to the circuit, the current flows from the third electrode pin 14 to the sixth electrode pin 17 as shown in FIG. At 22, the voltage V1 is measured.

At this time, if the above-described switching operation of FIG. 2 and FIG. 3 is performed at the instant, voltage measurement at the first voltmeter 24 and at the second voltmeter 22 is performed at substantially the same time, as described above. It is possible to prevent the intensity of the gradual fall.

In another embodiment of the welding inspection apparatus of the present invention as shown in FIG. 4, when the size of the welding portion W is to be measured, the welding inspection apparatus is brought into contact with the outer surface of the measurement object M. FIG. In this case, as shown in FIG. 5, the first switch 42 contacts the E position, the second switch 44 contacts the D, and the third switch 46 contacts the G position.

Then, the current source 30 is operated to apply power to the circuit. Then, the voltage V1 between the third electrode pin 14 and the fifth electrode pin 16 measuring the weld portion W is measured. At this time, the current of the current source 30 flows only from the fourth electrode pin 15 to the sixth electrode pin 17. Therefore, even when the voltage V1 between the third electrode pin 14 and the fifth electrode pin 16 is measured, the voltage V1 'between the fourth electrode pin 15 and the fifth electrode pin 16 is substantially reduced. ) Is measured.

And it switches instantly. That is, as shown in FIG. 6, the first switch 42 is contacted to the A position, the second switch 44 is contacted to the C position, and the third switch 46 is contacted to the F position.

Then, the voltage V2 at the first voltmeter 24, which is the non-contact portion, is measured. At this time, when the fourth electrode pin 15 is located on the welding portion W, the resistance value R1 ′ between the fourth electrode pin 15 and the fifth electrode pin 16 is relatively large. This is measured. In other words, the resulting value A appears as a small value.

Then, the operator adjusts the welding inspection apparatus of the present invention, while slightly adjusting the interval (S) between each of the electrode pins (12, 13, 14, 15, 16, 17), and the fourth electrode pin (15) The resistance value R1 ′ between the fifth electrode pin 16 is measured to find a point where the resistance value R1 ′ is minimized.

Since the point at which the resistance value R1 'becomes the minimum is the edge point of the welded portion W, the voltage V1' between these points is measured, and as described above, the resultant value A is obtained and previously obtained. It is judged whether the welding quality is passed by comparing with the set inspection pass value B.

Unlike the method described above, before the non-contact portion is measured by the first voltmeter 24, the voltage between the fourth electrode pin 15 and the fifth electrode pin 16 in the second voltmeter 22 is measured. When measuring V1 '), one of the fourth electrode pin 15 or the fifth electrode pin 16 is moved to find a point where the resistance value R1' becomes the minimum, and as described above. After measuring the voltage V2 of the first voltmeter 24 by switching operation, the resistance value R2 is obtained, the resultant value A is obtained, and the welding quality can be judged by comparing it with a preset inspection pass value B. have.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

2 and 3, the crack in the object to be measured may be measured by measuring the voltage V1 between the fourth electrode pin 15 and the fifth electrode pin 16. That is, the voltage between the fourth electrode pin 15 and the fifth electrode pin 16 with cracks is greater than the voltage V2 between the second electrode pin 13 and the third electrode pin 14. (V1) is high. Based on this, it is possible to determine whether there is a crack inside the object to be measured.

In addition, in addition to the above embodiment, it is also possible to add a function of converting a more necessary welding operation into a numerical value and displaying it outside when the welding operation is failed.

In this case, although each configuration is not illustrated, the respective resistance values R1 and R2 are calculated from the respective voltages V1 and V2 measured by the voltmeters 22 and 24, and the resistance value ( A judgment unit for determining whether the welding quality has passed by comparing the obtained result A value with a preset inspection pass value B, by substituting R1 and R2), A display unit to be displayed, a difference calculator which calculates the difference between the test pass B value and the resultant A value when the judgment result is not satisfied, and converts the numerical value calculated by the difference calculator to a percentage A conversion unit and the like are further provided.

In this case, the step as shown in FIG. 10 is further performed.

Specifically, when the resultant value A becomes the maximum value, the resultant value A measured is compared with a preset test value B, and the welding quality is passed according to whether the resultant value A is equal to or greater than the test value B. Determination step (S100) for determining whether or not, if the determination result A≥B in the determination step (S100), the acceptance display step (S110) for notifying to the outside that the acceptance, and the determination result in the determination step (S100) In the case of A <B, a fail display step (S120) of notifying outside of failure, and in the determination step (S100), if A <B, a calculation step of calculating a difference value C by C = BA ( S130 and a conversion step (S140) of calculating a value of C / B * 100 from the difference value C calculated in the calculation step (S130); An additional display step (S150) for displaying an additional amount of work by displaying the value calculated in the conversion step (S140) to the outside is further added.

The determination step (S100), as described above, is a process of comparing the result value A value with a predetermined test pass value B.

In the fail display step (S120), while the display of the rejection to the outside, using a buzzer or the like notifies the failure to the outside.

The calculating step (S130) is a process of calculating how much the resultant A value is insufficient to the test pass value B, and the conversion step (S140) checks the difference value C calculated in the calculation step (S130). This is the process of converting as a percentage of the value B.

In addition, the additional display step (S150) is a process of displaying the insufficient value calculated by the conversion step (S140) to the outside. Accordingly, the user may perform additional work by referring to the converted value displayed externally. That is, if the value displayed in the additional display step (S150) is 50%, it means that the welding work that has already been worked is 1/2 level of the required pass value, and thus additional welding of the existing work amount should be added. Means.

10: electrode pin 12: first electrode pin
13: second electrode pin 14: third electrode pin
15: fourth electrode pin 16: fifth electrode pin
17: sixth electrode pin 20: voltmeter
22: second voltmeter 24: first voltmeter
30: current source 40: switch
42: first switch 44: second switch
46: third switch S100. Judgment stage
S110. Pass indication step S120. Failed Mark Step
S130. Calculation step S140. Conversion stage
S150. Additional display step

Claims (5)

The first electrode pins 12, the second electrode pins 13, and the third electrode pins 14, which are disposed at the same intervals S in a straight line order by contacting the tip surfaces on the same surface of the object M. A fourth electrode pin 15, a fifth electrode pin 16, and a sixth electrode pin 17;
A current source (30) for applying a current between the electrode pins (12, 13, 14, 15, 16, 17);
A first voltmeter (24) for measuring the voltage (V2) between the second electrode pin (13) and the third electrode pin (14);
A second voltmeter (22) for measuring a voltage (V1) between the fourth electrode pin (15) and the fifth electrode pin (16);
A first switch 42 selectively connecting one end of the current source 30 to one of the first electrode pin 12 and the third electrode pin 14;
A second switch 44 for selectively connecting the other end of the current source 30 to one of the fourth electrode pin 15 or the sixth electrode pin 17;
The resistance values R2 and R1 are calculated using the voltages V2 and V1 respectively measured by the first voltmeter 22 and the second voltmeter 24, and the resistance values R2 and R1 are calculated using a preset equation. The resultant value A is obtained by substituting the resultant value, and the resultant value A is compared with the preset test value B to determine whether the resultant value A is equal to or greater than the test value B. A judging unit;
A display unit which displays the determination result of the determination unit to the outside;
A difference calculation unit for calculating a difference value between the inspection pass value B and the result value A when the determination result is a failure;
And a conversion unit for converting the difference value calculated by the difference calculator into a percentage of the inspection pass value B and displaying the difference to the outside. In the welding inspection device configured by claim 1,
A first step of contacting the welding portion (W) of the object to be measured (M) between the fourth electrode pin (15) and the fifth electrode pin (16);
A second step of applying a current to the first electrode pin 12 and the sixth electrode pin 17;
The resistance value R2 is calculated by measuring the voltage V2 between the second electrode pin 13 and the third electrode pin 14, and the fourth electrode pin 15 and the fifth electrode pin ( A third step of calculating the resistance value R1 by measuring the voltage V1 between 16) and measuring the resultant value A by A = ((R2-R1) / R2) * 100;
A determination step of comparing the resultant value A of the third step with a preset inspection pass value B and determining whether the weld quality has passed according to whether the resultant value A is equal to or greater than the inspection pass value B;
A pass display step of notifying outside that pass is passed when A≥B as a result of the determination in the judging step;
As a result of the determination in the determination step, in the case of A <B, a failure display step of notifying outside of failure;
A calculation step of calculating a difference value C by C = BA when A <B as a result of the determination in the determination step;
A conversion step of calculating a value of C / B * 100 from the difference value C calculated in the calculation step; And
And an additional display step of displaying an additional amount of work by displaying the value calculated in the conversion step to the outside. In the welding inspection device configured by claim 1,
A first step of making contact between the fourth electrode pin 15 and the fifth electrode pin 16 such that the fourth electrode pin 15 and the fifth electrode pin 16 are positioned at a point considered to be a welded portion W of the measurement object M;
A second step of applying a current to the first electrode pin 12 and the sixth electrode pin 17;
The resistance value R2 is calculated by measuring the voltage V2 between the second electrode pin 13 and the third electrode pin 14, and the fourth electrode pin 15 and the fifth electrode pin ( A third step of calculating the resistance value R1 by measuring the voltage V1 between 16) and measuring the resultant value A by A = ((R2-R1) / R2) * 100;
A fourth step of moving the fourth electrode pin 15 and the fifth electrode pin 16 until the resultant value A becomes maximum;
The determination is made to judge whether the welding quality is passed or not according to whether the result A value is equal to or larger than the test pass B value by comparing the result A value measured when the result A value is maximum to the preset test pass B value. step;
A pass display step of notifying outside that pass is passed when A?
As a result of the determination in the determination step, in the case of A <B, a failure display step of notifying outside of failure;
A calculation step of calculating a difference value C by C = BA if A <B as a result of the determination in the determination step;
A conversion step of calculating a value of C / B * 100 from the difference value C calculated in the calculation step; And
And an additional display step of displaying an additional amount of work by displaying the value calculated in the conversion step to the outside. In the welding inspection device configured by claim 1,
A first step of contacting the welding portion (W) of the object to be measured (M) between the fourth electrode pin (15) and the fifth electrode pin (16);
The first switch 42 is contacted with the first electrode pin 12, the second switch 44 is contacted with the fourth electrode pin 15, and a current is applied to the second electrode pin 13. A second step of obtaining a resistance value R2 by measuring the voltage V2 between the third electrode pins 14;
The first switch 42 is contacted to the third electrode pin 14, the second switch 44 is contacted to the sixth electrode pin 17, and a current is applied to the fourth electrode pin 15. A third step of obtaining a resistance value R1 by measuring the voltage V1 between the fifth electrode pins 16;
A fourth step of measuring the resultant A value by A = ((R2-R1) / R2) * 100;
A determination step of comparing the resultant value A of the fourth step with a preset inspection pass value B and determining whether the weld quality has passed according to whether the resultant value A is greater than or equal to the inspection pass value B;
A pass display step of notifying outside that pass is passed when A≥B as a result of the determination in the judging step;
As a result of the determination in the determination step, in the case of A <B, a failure display step of notifying outside of failure;
A calculation step of calculating a difference value C by C = BA if A <B as a result of the determination in the determination step;
A conversion step of calculating a value of C / B * 100 from the difference value C calculated in the calculation step; And
And an additional display step of displaying an additional amount of work by externally displaying the value calculated in the conversion step;
Welding inspection method, characterized in that the second step and the third step is made instantaneously. In the welding inspection device configured by claim 1,
A first step of making contact between the fourth electrode pin 15 and the fifth electrode pin 16 such that the fourth electrode pin 15 and the fifth electrode pin 16 are positioned at a point considered to be a welded portion W of the measurement object M;
The first switch 42 is contacted with the first electrode pin 12, the second switch 44 is contacted with the fourth electrode pin 15, and a current is applied to the second electrode pin 13. A second step of obtaining a resistance value R2 by measuring the voltage V2 between the third electrode pins 14;
The first switch 12 is contacted with the third electrode pin 14, the second switch 44 is contacted with the sixth electrode pin 17, and a current is applied to the fourth electrode pin 15. A third step of obtaining a resistance value R1 by measuring the voltage V1 between the fifth electrode pins 16;
A fourth step of measuring the resultant A value by A = ((R2-R1) / R2) * 100;
A fifth step of moving the fourth electrode pin 15 and the fifth electrode pin 16 until the resultant value A becomes maximum;
When the value of the resultant value A becomes the maximum, the resultant value A measured is compared with a preset inspection pass value B and judged whether or not the acceptance quality of the welding quality depends on whether the resultant value A is equal to or greater than the inspection pass value B. Determination step;
A pass display step of notifying outside that pass is passed when A≥B as a result of the determination in the judging step;
As a result of the determination in the determination step, in the case of A <B, a failure display step of notifying outside of failure;
A calculation step of calculating a difference value C by C = BA if A <B as a result of the determination in the determination step;
A conversion step of calculating a value of C / B * 100 from the difference value C calculated in the calculation step; And
And an additional display step of displaying an additional amount of work by displaying the value calculated in the conversion step to the outside.

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