KR102188936B1 - Inspection Apparatus For Stud Bolt - Google Patents

Abstract

According to one embodiment of the present invention, the present invention relates to an inspection apparatus for a stud bolt, which comprises: a jig unit which is able to fix a panel with at least one stud bolt; at least one inspection unit formed on the jig unit to be placed by corresponding to each of the at least one stud bolt, and measuring a pressure load applied to the stud bolt; and a control unit which determines the engagement status of each of the at least one stud bolt based on the load measured by each of the at least one inspection unit. Each of the at least one inspection unit includes: a driving unit; and an inspection member which is rotated by a certain angle by the driving unit. The inspection member includes a contact hole which is able to pressurize the stud bolt in at least two directions by the driving of the driving unit. The inspection apparatus for a stud bolt is able to rapidly and accurately inspect the welded status or the escape of the stud bolt.

Description

Stud bolt inspection device {Inspection Apparatus For Stud Bolt}

An embodiment of the present invention relates to a stud bolt inspection apparatus.

In automobile assembly, a number of parts of various types are joined to a vehicle body, and these parts are either directly welded to the vehicle body or fastened by stud bolts welded to the vehicle body attachment panel. In general, an automatic supply of stud bolts and a welding robot device are positioned according to a pre-designed welding program, and the stud bolts are welded at each preset position of the panel.

The stud bolts welded to the panel as above fix the vehicle body or other parts, and if the panel with the defective welding of the stud bolts is used as it is, it will significantly affect the quality of the finished vehicle or risk of safety accidents. Can be exposed to. At this time, as the above-described welding defect, there may be a case where the stud bolt itself is omitted, the stud bolt is not welded with sufficient bonding strength, and the stud bolt is not welded to the panel at a predetermined bonding angle.

Therefore, inspection for defects in panel bonding of stud bolts after automatic welding of stud bolts is a very important situation, and research and development efforts are focused on methods to minimize time and cost for the inspection process and improve inspection accuracy.

However, most of the conventional stud bolt welding state inspection apparatuses apply pressure or external force to the stud bolt in a general slide movement method, and determine the coupling state based on the measured load value. In this case, volume increase was inevitable even when a minimum number of parts were used to form the driving part for the slide pressurization driving of the stud bolts.To secure the driving area between slide driving, a plurality of stud bolts welded to one panel were simultaneously measured. There was a problem of being difficult.

Korean Registered Patent Publication No. 1588869 (2016.01.20)

Embodiments of the present invention are to provide a stud bolt inspection apparatus capable of quickly and accurately inspecting whether a welded state or missing a plurality of stud bolts welded to a panel.

In addition, embodiments of the present invention is to provide a stud bolt inspection apparatus capable of simultaneously inspecting each of a plurality of adjacent stud bolts by minimizing the size of a driving part of an inspection member for measuring the bonding strength of the stud bolt.

In addition, embodiments of the present invention are to provide a stud bolt inspection apparatus capable of simultaneously inspecting whether or not a stud bolt welded to a panel is missing, defective bonding strength, and defective bonding angle.

In addition, embodiments of the present invention are to provide a stud bolt inspection apparatus capable of inspecting strength in at least two directions as well as strength inspection in one direction of the stud bolt.

According to an embodiment of the present invention, a jig portion capable of fixing a panel on which at least one stud bolt is positioned; At least one inspection unit formed on the jig unit, each of which is positioned corresponding to each of the at least one stud bolt, and measures a pressure load value for the stud bolt; And a control unit for determining a coupling state of each of the at least one stud bolt based on a load value measured by each of the at least one inspection unit, wherein each of the at least one inspection unit includes a driving unit and a predetermined angle by the driving unit. Including a rotating inspection member, the inspection member may provide a stud bolt inspection apparatus comprising a contact hole that can pressurize the stud bolt in at least two directions by driving the driving unit.

The inspection member may have a predetermined length, the inspection member is rotated by a predetermined angle with respect to a rotation axis positioned at one end in the longitudinal direction, and the contact hole may be formed at the other end of the inspection member.

The contact hole may press the stud bolt from both sides in the radial direction as the inspection member is rotated.

The stud bolt inspection apparatus further includes a locator on which the panel is seated, and the jig portion is rotatably coupled to one side of the locator to be rotated at a predetermined angle, thereby gripping the panel.

The at least one inspection part may be formed such that each of the at least one stud bolt is inserted into each of the at least one contact hole when the jig part grips the panel.

The driving unit may include a driving member and at least one reduction gear positioned in a process of transmitting power from the driving member to the inspection member.

When the measured load value does not reach a predetermined value, the control unit may determine that the stud bolt is missing.

When the moving distance in any one direction to the measurement point of the load value during movement of the contact hole on both sides of the stud bolt exceeds a preset value, the control unit may determine that the coupling failure of the stud bolt is I can.

The stud bolt inspection device further includes a locator that is slidable with respect to the ground, and any one of the at least one inspection unit for each of the at least one stud bolt positioned on the panel as the locator slides. The pressure load value can be measured sequentially.

According to the embodiments of the present invention, it is possible to quickly and accurately inspect a welding state or whether a plurality of stud bolts are welded to a panel.

In addition, according to the embodiments of the present invention, it is possible to simultaneously inspect each of a plurality of adjacent stud bolts by minimizing the size of the driving part of the inspection member for measuring the bonding strength of the stud bolt.

In addition, according to embodiments of the present invention, it is possible to simultaneously inspect whether the stud bolts welded to the panel are missing, defective bonding strength, and defective bonding angle.

In addition, according to embodiments of the present invention, it is possible to test the strength in at least two directions as well as the strength test in one direction of the stud bolt.

1 is a view showing an open state of the jig portion of the stud bolt inspection apparatus according to an embodiment of the present invention
2 is a view showing a closed state of the jig portion of the stud bolt inspection apparatus according to an embodiment of the present invention
3 is a partially enlarged view for showing the configuration of an inspection unit of the stud bolt inspection apparatus according to an embodiment of the present invention
4 is a view showing a state in which the inspection member of the stud bolt inspection apparatus according to an embodiment of the present invention inspects the stud bolt from the side of the stud bolt
5 is a view showing a state in which the inspection member of the stud bolt inspection apparatus according to an embodiment of the present invention inspects the stud bolt from the upper side of the stud bolt
6 is a view showing a method of inspecting whether the stud bolt inspection apparatus according to an embodiment of the present invention is defective in bonding strength, defective placement angle, and omission of a stud bolt to be inspected

Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. However, this is only an example and the present invention is not limited thereto.

In describing the present invention, when it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification.

The technical idea of the present invention is determined by the claims, and the following embodiments are only one means for efficiently describing the technical idea of the present invention to those of ordinary skill in the art.

1 is a view showing an open state of the jig portion 100 of the stud bolt inspection apparatus 10 according to an embodiment of the present invention, Figure 2 is a stud bolt inspection apparatus 10 according to an embodiment of the present invention It is a view showing a state in which the jig portion 100 is closed.

1 and 2, the stud bolt inspection apparatus 10 according to an embodiment of the present invention is capable of fixing a panel (shown in FIG. 4) on which at least one stud bolt (shown in FIG. 4) is positioned. The jig unit 100 may include at least one inspection unit 200 capable of measuring a pressure load value for the stud bolt, and a control unit determining a coupling state of the stud bolt 2.

At least one inspection unit 200 described above may be formed on the jig unit 100. That is, as shown in the drawing, only one inspection unit 200 may be formed on one side of the jig unit 100, but is not limited thereto, and two or more inspection units 200 are arranged spaced apart from each other on one jig unit 100 Can be formed. In addition, each of the at least one inspection unit 200 may be positioned corresponding to each of the at least one stud bolt 2 on the panel 3, and each of the at least one inspection unit 200 includes at least one stud bolt 2, respectively. The pressure load value for can be measured. Each of the at least one inspection unit 200 described above may include a load sensor such as a load cell (not shown).

In addition, the control unit may determine an engagement state of the panel 3 of each stud bolt 2 based on the load value measured by each of the at least one inspection unit 200 described above. At this time, the bonding state of the stud bolt 2 to the panel 3 means whether the stud bolt 2 is missing, whether sufficient bonding strength is provided for a preset external force, and the standing angle of the stud bolt 2 with respect to the panel 3 It may mean whether or not is located within an error range.

Meanwhile, each of the at least one inspection unit 200 described above may include a driving unit 210 and an inspection member 220 rotated by a predetermined angle by the driving unit 210. In this case, the above-described inspection member 220 may include a contact hole 221 capable of pressing the stud bolt 2 in at least two directions by driving of the driving unit 210.

Specifically, the inspection member 220 may be formed in a bar shape having a predetermined length, and the inspection member 220 may be rotated by a predetermined angle with respect to a rotation shaft 213 located at one end in the longitudinal direction. In this case, the contact hole 221 may be formed at the other end of the inspection member 220. That is, the bar-shaped inspection member 220 may be rotated at one end at a predetermined angle with respect to the rotation axis 213, and the contact hole 221 capable of pressing the stud bolt 2 is a rotation axis in the inspection member 220 It may be formed at the opposite end (the other end) of the (213).

On the other hand, the stud bolt inspection apparatus 10 according to an embodiment of the present invention may further include a locator 300 on which the above-described panel 3 is seated, and the jig portion 100 is one side of the locator 300 The panel 3 can be gripped as it is rotated and coupled to a predetermined angle. Specifically, the jig portion 100 may be formed to have a predetermined length, and a hinge shaft 120 may be formed at one end of the jig portion 100. In addition, the hinge shaft 120 of the jig unit 100 may be hingedly connected to an operation unit 400 such as a hydraulic cylinder, and a part of one side of the jig unit 100 is a rotation support unit 311 hinged with the locator 300 Can be combined with

Through this, when the operation unit 400 operates the hinge shaft 120 of the jig unit 100 forward and backward, one end of the rotation support unit 311 can be rotated based on the hinge coupling portion with the locator 300, and the jig unit 100 may be supported in a state coupled to the other end of the rotation support part 311 (refer to FIG. 1). That is, the jig portion 100 may be rotated while drawing an arc around the hinge coupling portion of the rotation support portion 311 with the locator 300 at a position of the rotation support portion 311. On the other hand, the operation unit 400 is not limited to a hydraulic cylinder, and any driving method capable of moving one end of the jig unit 100 forward and backward may be changed and applied.

In addition, the jig portion 100 may include a first gripping portion 110 formed on the locator 300 side. The first gripping part 110 is formed at a corresponding position so as to be in contact with the second gripping part 320 of the locator 300 to be described later when the jig part 100 is located in a closed state as shown in FIG. 2. The panel 3 may be positioned and fixed between the first gripping part 110 and the second gripping part 320. Meanwhile, both the first gripping part 110 and the second gripping part 320 described above may be formed to have a predetermined elasticity, and it is possible to prevent the panel 3 and the panel 3 between grips from being damaged or deformed.

The above-described locator 300 is a seating member 310 that can be coupled or fixed to the ground or other facilities, and is positioned on the seating member 310 to hold the panel 3 together with the jig portion 100 described above. 2 It may include a buffer member 330 for preventing damage to the panel 3 when the holding portion 320 and the panel 3 are seated and the panel 3 of the jig portion 100 is gripped. The shape of the mounting member 310 described above may be modified according to the shape of the panel 3 to be mounted.

The above-described second gripping part 320 may be positioned in a direction facing the first gripping part 110, and the buffer member 330 is formed in a cylinder shape having an elastic member such as a spring therein to form a jig part. It is possible to reduce the rotational speed of 100 and prevent damage or deformation of the panel 3 that may occur between the rotation of the jig unit 100.

On the other hand, when describing the order of mounting the panel 3 and fixing the panel 3 of the jig portion 100, the panel 3 is in a state where the jig portion 100 is opened (see FIG. 1) by the operation of the operation portion 400. It may be seated on the seating member 310, and the operation unit 400 may be manipulated again so that the jig unit 100 may be positioned in a closed state (see FIG. 2). In this case, the panel 3 may be positioned and held between the first gripping part 110 and the second gripping part 320.

In addition, the rotation speed of the jig portion 100 may be reduced by the buffer member 330 between the rotational transition from the open state to the closed state, and the amount of impact applied to the panel 3 by the jig portion 100 is attenuated. Can be.

Further, at least one inspection unit 200 is at least one stud bolt (2) each at least one contact hole (221) when the jig unit 100 grips the panel 3 located on the locator 300 ) It can be formed to be inserted into each inner position.

Specifically, when a plurality of inspection units 200 are formed on the jig unit 100, when the panel 3 of the jig unit 100 is gripped, each of the plurality of inspection units 200 corresponds to each of the plurality of stud bolts 2 Can be located. At this time, more preferably, each of the plurality of stud bolts 2 may be inserted into each of the plurality of contact holes 221, and the plurality of stud bolts 2 are coupled by the operation of the driving unit 210 Can be checked at the same time. Through this, it is possible to quickly and accurately inspect the coupling state of each of the plurality of stud bolts 2 coupled to the panel 3.

3 is a partial enlarged view for showing the configuration of the inspection unit 200 of the stud bolt inspection apparatus 10 according to an embodiment of the present invention.

Referring to FIG. 3, the above-described driving unit 210 includes a driving member 211 and at least one reduction gear 212a, 212b positioned in the process of transmitting power from the driving member 211 to the inspection member 220, 212c). Specifically, the driving member 211 may include a driving shaft 2111 that outputs a rotational driving force, and the at least one reduction gear 212a, 212b, 212c described above includes a first reduction gear 212a and a second It may be formed of a reduction gear 212b and a third reduction gear 212c.

More specifically, the drive shaft 2111 may be meshed with the first reduction gear 212a, and the first reduction gear 212a may be meshed with the second reduction gear. In this case, the first reduction gear 212a may be composed of two gears arranged in alignment along the length direction of the drive shaft 2111, and any one of the two gears located on the upper side is the drive shaft 2111 ) And the other gear positioned at the lower side may be engaged with the second reduction gear 212b. In addition, the second reduction gear 212b may be engaged with the third reduction gear 212c coupled with the rotation shaft 213 for rotating the inspection member 220 to be described later.

Through this, the driving member 211 is a driving shaft 2111, a first reduction gear 212a, a second reduction gear 212b, a third reduction gear 212c, and the inspection member 220 as the rotation shaft 213. A rotational driving force may be provided to and the inspection member 220 may be rotated at a predetermined angle around the rotation axis 213. As the inspection member 220 is rotated by a predetermined angle, the inspection member 220 may provide a pressing force of a predetermined rod to the stud bolt 2 inserted into the contact hole 221.

Meanwhile, when the above-described drive shaft 2111, the first reduction gear 212a, the second reduction gear 212b, and the third reduction gear 212c are engaged with each other, the gear ratio may be gradually increased, and the driving member 211 Even if) is formed in a small size, the inspection member 220 can be easily rotated even with a small drive output to pressurize with a sufficient rod size to inspect the coupling state of the stud bolt 2.

In addition, the above-described driving member 211 may be a motor, but is not limited thereto, and any one capable of providing rotational driving force to the inspection member 220 such as a rotating cylinder is sufficient.

Further, the above-described driving unit 210 is rotated by a predetermined angle by the rotational driving force of the driving member 211 rather than pressurizing the stud bolt 2 by linear driving, and pressurizing the stud bolt (2). The bar and the driving unit 210 do not require members such as a slider or cylinder for linearly driving the inspection member 220, and a driving member 211 for providing a simple rotational force, and first to third reduction gears 212a and 212b. , 212c) and a rotation shaft 213.

Through this, the stud bolt inspection apparatus 10 according to an embodiment of the present invention can be provided with a plurality of inspection units 200 on the jig unit 100 by minimizing the size of the driving unit 210, the panel 3 ) Of the plurality of stud bolts 2 coupled to each other, each of the plurality of stud bolts 2 disposed adjacent to each other may be inspected at the same time.

4 is a view showing a state in which the inspection member 220 of the stud bolt inspection apparatus 10 according to an embodiment of the present invention inspects the stud bolt 2 from the side of the stud bolt 2, and FIG. 5 is It is a view showing a state in which the inspection member 220 of the stud bolt inspection apparatus 10 according to an embodiment of the present invention inspects the stud bolt 2 from the upper side of the stud bolt 2.

In this case, (a) of FIG. 4 is a view showing a state in which the stud bolts 2 are properly coupled to the panel 3, and (b) of FIG. 4 is the stud bolt 2 to the panel 3 It is a view showing a state in which the coupling exceeds the allowable arrangement angle, and (c) of FIG. 4 is a view showing a state in which the stud bolt 2 is omitted. In addition, (a) of FIG. 5 is a view showing a state in which the stud bolts 2 are properly coupled on the panel 3, and (b) of FIG. 5 is the stud bolt 2 with respect to the panel 3 It is a view showing a state in which the bonded state exceeds the allowable arrangement angle, and (c) of FIG. 5 is a view illustrating a state in which the stud bolt 2 is omitted.

4A to 4C and 5A to 5C, each of the plurality of stud bolts 2 when fixing the panel 3 of the jig portion 100 as described above is It may be inserted into each of the plurality of contact holes 221. In this case, the contact hole 221 may press the stud bolt 2 from at least two sides in the radial direction as the inspection member 220 is rotated about the rotation axis 213.

Specifically, as the inspection member 220 is rotated, the contact hole 221 may be moved in the radial direction of the stud bolt 2, and the stud bolt 2 may be inscribed in the contact hole 221. The inspection unit 200 may measure a load value applied to the stud bolt 2 through continuous rotational driving of the driving unit 210 when contacting the contact hole 221 and the stud bolt 2.

On the other hand, preferably, as the inspection member 220 is rotated with respect to the rotation axis 213, the contact hole 221 can press both sides of the stud bolt 2 in the radial direction, and the radius of the stud bolt 2 It is possible to easily measure the bonding strength against pressure on both sides of the direction.

That is, the stud bolt inspection apparatus 10 according to an embodiment of the present invention does not simply inspect the coupling state through one-way pressing to the stud bolt 2, but at the same time by rotating the inspection member 220 in both directions. (2) It is possible to check the coupling state for the two-way pressurization.

6 is a diagram illustrating a method of inspecting whether the stud bolt inspection apparatus 10 according to an embodiment of the present invention inspects whether the stud bolt 2 to be inspected is defective in bonding strength, whether an arrangement angle is defective, and whether it is missing.

In this case, (a) of FIG. 6 is an inspection result showing a state in which the stud bolt 2 is coupled to the panel 3 at a normal strength and an arrangement angle, and FIG. 6 (b) shows the stud bolt 2 It is an inspection result showing a state in which the panel 3 is coupled beyond an allowable arrangement angle, and FIG. 6C is an inspection result showing a state in which the stud bolt 2 is missing.

6A to 6C, the above-described control unit determines that the stud bolt 2 at the corresponding position is missing if the load value measured by the inspection unit 200 does not reach a predetermined value. I can.

For example, when the stud bolt 2 is missing, as shown in (c) of FIG. 4 and (c) of FIG. 5, the inspection member 220 is rotated to increase the moving distance of the contact hole 221 Even if it does, contact with the stud bolt 2 does not occur, and a load value of more than a predetermined value (for example, 5 kgf.m) measured by pressing toward the stud bolt 2 is not detected. At this time, only a minimum load value (for example, 1kgf.m) required for driving the inspection member 220 may be detected.

On the other hand, when the moving distance in any direction to the measurement point of the load value equal to or greater than a preset value during movement on both sides of the contact hole 221 with respect to the stud bolt 2 exceeds a preset value, The stud bolt 2 at the position can be determined as a defective coupling state. In other words, if the stud bolts 2 are joined on the panel 3 but are placed at an angle θ that exceeds the allowable placement angle for the panel 3, the control unit will have the corresponding position ‡ the stud bolt 2 is defective. It can be determined to be. In this case, the arrangement angle of the stud bolt 2 with respect to the panel 3 may mean an arrangement angle formed by the longitudinal direction of the stud bolt 2 with respect to an orthogonal axis of the outer surface of the panel 3.

For example, when the stud bolt 2 is disposed at an angle θ exceeding the allowable placement angle for the panel 3 as shown in FIGS. 4B and 5B, the stud bolt (2) The distance from the end to the inner peripheral surface of the contact hole 221 may be formed to be different from each other. At this time, when the contact hole 221 moves, pressing the stud bolt 2 from both sides in the radial direction of the stud bolt 2 until a load value (for example, 5kgf.m) equal to or greater than a preset value is measured. ), when any one of the two-way movement distances exceeds a predetermined value (for example, 6 mm), the above-described stud bolt 2 may be determined to have exceeded the allowable arrangement angle for the panel 3 .

On the other hand, for example, as shown in Fig. 4 (a) and Fig. 5 (a), the stud bolt 2 is coupled to the panel 3 within the allowable arrangement angle for the panel 3 and sufficient bonding In the case of strength, even when the contact hole 221 moves in any direction, a load value (for example, 5kgf.m) that is equal to or greater than a preset value (for example, 5kgf.m) is within a preset value (for example 6mm). ) Can be measured At this time, the control unit can determine the coupling state of the stud bolt 2 as normal.

As described above, the stud bolt inspection apparatus 10 according to an embodiment of the present invention may simultaneously inspect whether the stud bolt 2 welded to the panel 3 is missing, defective bonding strength, and defective bonding angle.

Meanwhile, although not shown in the drawings, the stud bolt inspection apparatus according to another embodiment of the present invention may include a jig unit, an inspection unit, a control unit, and a locator that is slidable with respect to the ground. At this time, each of the jig unit, the inspection unit, and the control unit of the stud bolt inspection apparatus according to another embodiment of the present invention are the jig unit 100 of the stud bolt inspection apparatus 10 according to the embodiment of the present invention, and the inspection unit ( 200) and the control unit, a detailed description thereof will be omitted.

At this time, any one of the at least one inspection unit can sequentially measure the value of the pressure load for each of the plurality of stud bolts 2 positioned on the panel 3 as the locator slides against the ground. have. That is, even when only one inspection part is formed on the jig part, as the locator slides, the pressure rod values for each of the plurality of stud bolts 2 can be sequentially measured. In this case, a rail (not shown) for slide movement may be formed on the locator, but this is illustrative and is not limited thereto.

Although the present invention has been described in detail through exemplary embodiments above, a person of ordinary skill in the art to which the present invention pertains will realize that various modifications can be made to the above-described embodiments without departing from the scope of the present invention. I will understand. Therefore, the scope of the present invention is limited to the described embodiments and should not be determined, and should not be determined by the claims to be described later, but also by those equivalents to the claims.

10: stud bolt inspection device
100: jig part
110: first gripping portion
120: hinge shaft
200: inspection unit
210: drive unit
211: drive member
2111: drive shaft
212a: first reduction gear
212b: second reduction gear
212c: 3rd reduction gear
213: axis of rotation
220: inspection member
221: contact hole
300: locator
310: mounting member
311: rotation support
320: second gripping portion
330: buffer member
400: control panel
2: stud bolt
3: panel

Claims (9)

A jig portion capable of fixing a panel on which at least one stud bolt is located;
At least one inspection unit formed on the jig unit, each of which is positioned to correspond to each of the at least one stud bolt, and measures a pressure load value for the stud bolt; And
Including; a control unit for determining the coupling state of each of the at least one stud bolt based on the load value measured by each of the at least one inspection unit,
Each of the at least one inspection unit,
Drive and
Including an inspection member rotated by a predetermined angle by the driving unit,
The inspection member includes a contact hole capable of pressing the stud bolt in at least two directions by driving the driving unit,
The inspection member is formed to a predetermined length,
The inspection member is rotated by a predetermined angle based on a rotation axis located at one end in the longitudinal direction,
The contact hole is formed at the other end of the inspection member, stud bolt inspection device.
delete The method according to claim 1,
The contact hole pressurizes the stud bolt from both sides in the radial direction as the inspection member rotates.
The method according to claim 1,
The stud bolt inspection device further includes a locator on which the panel is seated,
The jig portion is coupled to one side of the locator so as to be rotatable at a predetermined angle so as to grip the panel as it is rotated.
The method of claim 4,
The at least one inspection unit,
When the jig portion grips the panel, each of the at least one stud bolt is formed to be inserted into each of the at least one contact hole.
The method according to claim 1,
The driving unit,
A stud bolt inspection apparatus comprising a driving member and at least one reduction gear positioned in a process of transmitting power from the driving member to the inspection member.
The method according to claim 1,
The control unit,
If the measured load value does not reach a predetermined value, it is determined that the stud bolt is missing.
The method according to claim 1,
The control unit,
When the moving distance in any direction to the measurement point of the load value equal to or greater than a preset value during movement of the contact hole on both sides of the stud bolt exceeds a preset value,
Stud bolt inspection device that determines that the coupling failure of the stud bolt.
The method according to claim 1,
The stud bolt inspection device further includes; a locator slidable with respect to the ground,
Any one of the at least one inspection unit sequentially measures a pressure load value for each of the at least one stud bolt positioned on the panel as the locator slides.

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