KR20110130981A - Apparatus for specimen arranging - Google Patents

Abstract

PURPOSE: A specimen alignment device is provided to obtain accurate test results by accurately aligning a specimen in a short time. CONSTITUTION: A specimen alignment device comprises a jig(100), a weight body(190), and a laser body. The jig supports a specimen(30) for a fatigue failure test. The weight body repetitively applies a compressive load to the top of the specimen in a vertical direction. The laser body is supported by the jig and confirms the alignment of the specimen using a laser beam.

Description

Specimen Sorter {APPARATUS FOR SPECIMEN ARRANGING}

The present invention relates to a specimen aligner, and more particularly, in support of the crack tip opening displacement (CTOD) experiment to evaluate the resistance to fatigue failure of the steel, the support and the specimen for supporting the steel specimen in place A specimen aligner that allows the process to proceed in an aligned state.

Machines and structures are subject to cyclic stresses, even if they are significantly smaller than their material's static strength, if they are repeated for long periods of time. This phenomenon is called fatigue failure. More than 90% of actual structural failures are known to be fatigue-related.

The above-mentioned fatigue failure starts from impurities or defects of the material, places where the cross section changes rapidly, such as keyways or shaft shortening parts, and defects generated during machining. In order to measure the fatigue strength of the material, a method of applying a cyclic load to the specimen and checking the fracture state is used.

For example, in the process of repeatedly applying a compressive load to a specimen, a method of minimizing the contact surface between the support supporting the specimen and the specimen is used in order to prevent the compression load from being transferred to portions other than the specimen, thereby causing the test failure. .

In addition, a support for supporting the specimen is formed on both sides of the specimen, and in this state, the center of the specimen is checked, and a compressive load is applied to the center to evaluate the resistance to fatigue failure of the steel.

The specimen aligner according to the present invention is to provide a specimen aligner for minimizing the reduction of the failure rate of the specimen by aligning the steel specimen in the position of the support in order to evaluate the resistance to fatigue failure of the steel.

Specimen aligner according to the present invention is to provide a specimen aligner that can easily and accurately align the specimen by aligning the steel specimen in the correct position of the support in order to evaluate the resistance to fatigue failure of the steel There is this.

The specimen aligner according to the present invention has another object to provide a specimen aligner that can easily check whether the specimen and the support of the steel is accurately aligned even during the evaluation of the resistance to fatigue failure of the steel.

The specimen aligner according to the present invention has another object to provide a specimen aligner capable of performing precise experiments of the specimen regardless of the size by simply operating the support, even when using a specimen of various sizes.

Looking at the configuration of the present invention for achieving the above object,

A jig for supporting the specimen for fatigue failure testing under repeated load, a load body repeatedly applying a compressive load in the vertical direction from the center of the specimen, and the jig supported by the jig, but using the laser beam Include the laser body to check the alignment.

Subsequently, the jig includes a support roller having a pair of rod-shaped supports for minimizing the surface in close contact with the specimen, a support tool for supporting the support rollers at a lower portion such that the support roller is rotatable, and the support It includes a support body formed in the horizontal direction for supporting the earth from the bottom.

And, the upper portion of the support is provided with a seating groove is seated so that the support roller is rotatable, the lower portion of the support, while being connected to the upper support body, the sliding groove which is movable or fixed in the horizontal direction is further It is provided.

Subsequently, the support body is connected to the sliding groove of the support, and includes a guide plate to enable the support to move or fix.

In addition, the guide plate further includes a numerically enumerated surface on which numbers and scales are provided so that the numerical value can be checked from the outside.

Subsequently, the center of the specimen includes a notch grooved in the vertical direction.

On the other hand, the load body is made of a circular rod shape so as to apply a compressive load to the specimen while the surface in close contact with the specimen is minimized.

Subsequently, the laser body includes a laser light emitting unit for emitting a laser light in a direction perpendicular to the center of the specimen positioned horizontally, a vertical plate formed in a vertical direction to support the laser light emitting unit from below, and the bottom of the vertical plate. It is formed in a horizontal direction and includes a horizontal plate connected to the jig.

In addition, the laser light emitting unit includes a lifting unit configured to move up and down while being supported by the vertical plate.

Subsequently, the elevating unit is rotated while being connected to the laser light emitting unit and the vertical plate so as to be parallel to the laser light emitting unit, while being formed in parallel with the screw bolt to allow the laser light emitting unit to move up or down. And a guide rod interconnected to the plate.

Next, the screw bolt further comprises a rotational auxiliary piece to be gripped from the outside.

Subsequently, the laser light emitting unit includes a nut groove to be raised or lowered by bidirectional rotation of the screw bolt, and a fixing groove to which the upper part of the guide rod is fixed.

The vertical plate may include a screw groove for raising or lowering by bidirectional rotation of the screw bolt, and a guide groove for guiding the lower portion of the guide rod.

Subsequently, the laser light emitting unit further includes a light generator provided inside to generate a laser beam, and a diverging groove that emits light generated by the light generator to the outside.

In addition, the horizontal plate further includes a numerical confirmation groove formed in the vertical direction so that the numerical value described on the upper surface of the jig.

Subsequently, the numerical confirmation groove further includes a numerical surface on which numbers and scales for identifying the numerical value from the outside are described.

In the specimen aligner according to the present invention, in evaluating the resistance to fatigue failure of steel, there is an effect of using the specimen aligning in a short time to obtain accurate experimental results.

Specimen aligner according to the present invention, in evaluating the resistance to fatigue failure of the steel, because it is possible to continuously check the mutual alignment of the specimen and the support during the test of the specimen, unnecessary during the experiment due to the defective rate due to the deviation of the specimen There is an economic effect to prevent costs.

The specimen aligner according to the present invention does not require any additional components and installation work even when experimenting with specimens of various sizes, thereby reducing the cost and time.

1 is an overall perspective view showing a specimen aligner according to the present invention.
Figure 2 is an exploded perspective view of the configuration of the specimen aligner according to the present invention.
Figure 3 is a perspective view showing the main portion of the specimen aligner according to the present invention.
Figure 4 is an embodiment showing an embodiment of a specimen aligner according to the present invention.
5 is an embodiment showing another embodiment of a specimen aligner according to the present invention.
Figure 6 is an exploded perspective view showing the decomposition of the main portion of the specimen aligner according to the present invention.
7 is a use state diagram showing a state of use of the specimen aligner according to the present invention.

DETAILED DESCRIPTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It is to be understood that the various embodiments of the invention are different, but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention with respect to one embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is defined only by the appended claims, along with the full range of equivalents to which such claims are entitled. In the drawings, like reference numerals refer to the same or similar functions throughout the several aspects, and length, area, thickness, and the like may be exaggerated for convenience.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

In the following detailed description, for example, to minimize the failure rate of the specimen and the specimen used in the CTOD experiment to evaluate the resistance to fatigue failure of the steel, the experiment is carried out with the specimen positioned in place Accordingly, the technical configuration of the specimen aligner [particularly, the laser body 200] of the present invention can be equally applied throughout the technical field so that the straightness of the specimen crack meets the requirements of each country. Of course you will.

Specimen aligner according to the present invention to be described later, using the specimen 30 for the CTOD experiment to evaluate the resistance to fatigue failure of the steel, the above-mentioned long formed in the horizontal direction before testing the specimen 30 The test piece 30 is provided with a notch 32 which is a groove indicating the center of the test piece 30 at the center lower part.

In addition, the specimen 30 is positioned so that the jig 100 supports both lower portions of both sides of the specimen 30 while minimizing an area in contact with the jig 100 supporting the specimen 30. .

In addition, the specimen 30 supported by the jig 100 is preferably supported such that the position of the notch 32 is located at the center of the jig 100.

As such, when the specimen 30 is placed in the correct position, the load body 190 provided on the specimen 30 is repeatedly compressed to the specimen 30 in the downward direction from the vertical upper portion of the notch 32. Will be charged.

As such, when the repeated compressive load is applied to the specimen 30, fatigue cracks are generated in the notch 32.

Here, fatigue crack refers to a state in which a crack is generated.

These fatigue cracks must meet the requirements of the national standards, and the results of the experiment will not be recognized if they do not meet the requirements.

Subsequently, the straightness of the crack, which is one of the items required for the proper evaluation of the fatigue crack, is due to the coincidence with the cyclic compressive load working line imposed for crack generation and the bending caused by the jig 100 supporting the specimen 30. It is important to agree with the reaction line of action.

At this time, the laser beam 200 is used to allow the test to proceed while the specimen 30 is correctly aligned on the jig 100.

1 is an overall perspective view showing a specimen aligner according to the present invention.

As shown in Figure 1, the specimen 30 for the CTOD experiment to evaluate the resistance to fatigue failure of the steel is placed in the horizontal direction long on the jig 100.

In addition, the specimen 30 is a notch 32 which is a groove representing the center of the specimen 30 at the center of the specimen 30 that is placed in the horizontal direction before being placed on the jig 100. It is preferable to form

The notch 32 is located at the center of the specimen 30 and forms a groove in the vertical direction.

In addition, when the specimen 30 is located in the upper position of the jig 100, the load body 190 is located above the specimen 30 in the vertical direction from the notch 32. .

Subsequently, when the compressive load is repeatedly applied to the specimen 30 by the load body 190 in the vertical upper portion of the notch 32, fatigue cracks are generated from the notch 32.

The straightness of the fatigue crack required for the proper evaluation of the fatigue crack, when the load body 190 imposes a repeated compressive load in the vertical downward direction from the vertical top of the notch 32 provided in the specimen 30 In addition, a direction in which the load body 190 extends from the vertical upper portion of the notch 32 to the vertical lower direction is called a working line.

In addition, when the load body 190 imposes a repeated compressive load on the specimen 30, the specimen 30, the bending reaction force is acting, the reaction force line acting such a reaction force and the load body 190 By matching the line of action, the exact test results for the fatigue failure resistance of the specimen (30) will come out.

Therefore, the load body 190 has a circular rod shape to apply a compressive load to the specimen 30 in a state in which the surface in close contact with the specimen 30 is minimized.

Subsequently, the load body 190 is placed in a direction intersecting with the longitudinal direction of the specimen 30, but imposes a compressive load while being in close contact with the upper surface of the specimen 30.

Subsequently, the jig 100 supports the specimen 30 and also supports the laser body 200 capable of confirming the correct position of the specimen 30.

In addition, the jig 100 supports a pair of support rollers 110 and 110 ′ in direct contact with the test piece 30 in supporting both ends of the test piece 30 placed in the horizontal direction from the bottom. Have

The support rollers 110 and 110 ′ have a rod shape, and the support rollers 110 and 110 ′ are positioned in a direction intersecting with the longitudinal direction in which the test specimen 30 is placed. It will have a minimum contact area.

As such, the support rollers 110 and 110 'and the specimen 30 have a minimum contact area with each other when the specimen 30 is subjected to repeated compressive loads by the load body 190. This is because the load received from the specimen 30 is dispersed by the support, so that accurate experiments cannot be performed.

In particular, since the support rollers 110 and 110 'are rotatably provided in the form of rods, the specimen 30 is secured in a fixed position while being closely attached to the upper support rollers 110 and 110'. It will be able to flow.

Subsequently, the specimen 30 is naturally flowed in a horizontal direction while being in close contact with the support rollers 110 and 110 ′.

On the other hand, when the specimen 30 is positioned on the support rollers 110 and 110 ', it should be confirmed that the notches 32 are located at the exact centers of the support rollers 110 and 110' on both sides.

To this end, the laser body 200 is to emit a laser beam to the specimen 30 to confirm that the notch 32 is located in the center between the two support rollers (110, 110 ').

As a result, since the light emitted from the laser body 200 marks the center of the support rollers 110 and 110 ', when the notch 32 is placed on a line coinciding with the emitted light, the specimen ( It can be recognized that 30) is aligned in position.

At this time, the light emitted from the laser body 200 is preferably emitted long in the vertical direction, if the specimen 30 can be aligned in the correct position, the light emitted from the laser body 200 is a variety of patterns Or it is natural that the shape and divergence direction can be used.

Figure 2 is an exploded perspective view of the configuration of the specimen aligner according to the present invention.

Referring to FIG. 2, the jig 100 is connected to supporters 120 and 120 'supporting the support rollers 110 and 110' in a rotatable manner, and connected to a lower portion of the supporters 120 and 120 '. The support body 130 is formed to extend in the horizontal direction while supporting the supporters 120 and 120 '.

As a result, the support 120 formed on one side of the support body 130 supports the support roller 110 and the support 120 formed on the other side of the support body 130. ') Supports the support roller 110'.

And, the support 120 (120, 120 ') above, the support grooves (110, 110') are provided with seating grooves (122, 122 ') to be seated rotatable.

Subsequently, the support rollers 110 and 110 'supported by the mounting grooves 122 and 122' are rotated so that the mounting grooves 122 and 122 'are not separated from the mounting grooves 122 and 122'. It is preferable that the support rollers 110 and 110 'are formed to wrap in a half arc shape.

In addition, a lower portion of the support (120, 120 '), the sliding grooves (124, 124') are provided to be movable or fixed in the horizontal direction while being connected to the upper support body 130.

Subsequently, the sliding grooves 124, 124 ′ of the supports 120, 120 ′ are connected to the support body 130, and as a result, the supports 120, 120 ′ are supported by the support body 130. Will be guided to move).

More specifically, the support plate 130, the guide plate 132 for sliding or fixing the sliding grooves (124, 124 ') are interconnected with the sliding grooves (124, 124'), Is formed.

Subsequently, the guide plate 132 is formed in a plate shape to be easily coupled to the sliding grooves 124 and 124 '.

The supporters 120 and 120 'are movable in the horizontal direction along the guide plate 132 by the sliding grooves 124 and 124', and the sliding grooves 124 and 124 'when fixed. Of course, the fixing plate (not shown) can be firmly fixed to the guide plate 132.

In particular, the upper surface of the guide plate 132 is provided with a numerically listed surface 134 in which numbers and scales are provided so that the numerical value can be confirmed from the outside.

In addition, the numerically listed surface 134 determines the positions of the supporters 120 and 120 ′ from the outside through the numerically listed surface 134, and positions the laser body 200 and the specimen 30. Performs a function to make sorting easier.

Subsequently, the numerically listed surface 134 may be represented using various patterns and colors as long as the positions of the supports 120 and 120 'and the laser body 200 and the specimen 30 can be smoothly aligned. Do.

The numerically listed surface 134 is provided with a number and a scale so that the numerical value can be confirmed from the outside, and by confirming the number and the scale of the numerically listed surface 134, the center of the specimen 30 and the laser Body 200 can be smoothly held in place.

Figure 3 is a perspective view showing the main portion of the specimen aligner according to the present invention.

Referring to Figure 3, the laser body 200, in order to easily confirm that the notch 32 provided in the center of the specimen 30 is located in the center of the center between the support (120, 120 ') The laser beam is emitted.

To this end, the laser body 200 has a laser light emitting unit 210 for emitting a laser light, and has a vertical plate 220 formed in a vertical direction to support the laser light emitting unit 210 from the bottom, The horizontal plate 230 is formed below the vertical plate 220 in a horizontal direction and fixedly connected to the support body 130.

At this time, the laser body 200, it is natural to obtain the power required to operate using an AC power applied from the outside or having a battery and a generator inside.

As such, since the apparatus for supplying and controlling the power for generating the laser beam is a known technique, it will be omitted here.

In addition, the laser light emitting unit 210 generates light therein to perform a function of emitting light to the specimen 30 outside the laser light emitting unit 210.

To this end, the laser light emitting unit 210 has a light generator 214 for generating a laser beam therein, and has a diverging groove 216 for emitting light generated by the light generator 214 to the outside. .

At this time, the laser light emitting unit 210, if it is possible to perform the function of generating light and irradiating the light, it is natural that the shape and size can be variously changed.

Then, the horizontal plate 230 mounted on the support body 130, while being supported by the horizontal plate 230, it is possible to flow or fix in the longitudinal direction of the support body 130.

Subsequently, in order for the horizontal plate 230 and the support body 130 to be firmly fixed to each other, the horizontal plate 230 and the support body 130 may be fixed to each other by bolts 50.

It is provided with a through nut groove 236 in the horizontal plate 230, the coupling nut groove 133 is provided in the support body 130, the bolt 50 is coupled to the through nut groove 236 Due to the coupling to the groove 133, the horizontal plate 230 is the support body 130 is fixed to each other.

At this time, the coupling nut groove 133 formed in the support body 130 is preferably formed in the center of the support body 130.

Coupling by the bolt 50, the through nut groove 236 and the coupling nut groove 133 according to the above-mentioned embodiment, the embodiment of the horizontal plate 230 and the support body 130 only Various methods can be used if the coupling can be fixed to each other.

On the other hand, since the vertical position of the notch 32 is changed according to the size and thickness of the specimen 30, the laser light emitting unit 210 is smoothly raised or lowered according to the vertical height of the notch 32. It is preferable to be able to descend.

To this end, the elevating unit 240 is rotated while being connected to the laser light emitting unit 210 and the vertical plate 220, the screw bolt 242 to allow the laser light emitting unit 210 to be raised or lowered. And, while being formed parallel to the screw bolt 242, it will have a guide rod 244 interconnected to the laser light emitting unit 210 and the vertical plate 220.

The screw bolt 242 is rotated in both directions, and performs the function to raise or lower the laser light emitting unit 210.

In addition, the outer surface of the screw bolt 242, the rotating auxiliary piece 246 to be gripped outside the screw bolt 242 is provided integrally with the screw bolt 242.

Looking at the use of the rotating auxiliary piece 246, when the user rotates in one direction while holding the rotating auxiliary piece 246, by the rotation of the screw bolt 242, the laser light emitting unit ( 210 is to be raised or lowered.

4 and 5 is an embodiment showing an embodiment of a specimen aligner according to the present invention.

4 and 5, the laser light emitting unit 210 is provided with a nut groove 211 to be raised or lowered by bidirectional rotation of the screw bolt 242, and the vertical plate 220 is provided. The screw groove 221 is provided to be raised or lowered by the bidirectional rotation of the screw bolt 242.

In addition, the laser light emitting unit 210 is provided with a fixing groove 212 in which an upper portion of the guide rod 244 is fixed, and the guide plate 242 is provided in the vertical plate 220. The guide groove 222 is provided to be movable.

Due to this configuration, when the screw bolt 242 is rotated in one direction, the laser light emitting unit 210 is raised and lowered, and in this state, the guide rod 242 is connected to the laser light emitting unit 210. While being fixed, the vertical plate 220 will be lifted from the inside.

When the screw bolt 242 is rotated in another direction, the laser light emitting unit 210 is lowered, and in this state, the guide rod 242 is fixed to the laser light emitting unit 210. It is to be lowered into the vertical plate 220.

Due to this configuration, the laser light emitting unit 210 can easily secure the position close to the height of the notch 32 of the specimen 30.

In addition, after the laser light emitting unit 210 is positioned at the same height as the notch 32, the light generated from the light generator 214 is emitted to the notch 32 through the diverging groove 216. Therefore, the correct position of the notch 32 can be secured.

Figure 6 is an exploded perspective view showing the decomposition of the main portion of the specimen aligner according to the present invention.

Referring to FIG. 6, the laser body 200 includes a laser light emitting unit 210 for emitting a laser light and a vertical plate 220 supporting the laser light emitting unit 210 under the laser light emitting unit 210. And a horizontal plate 230 formed in a horizontal direction under the vertical plate 220 and movable in a horizontal direction while being supported by the support body 130, wherein the vertical plate 220 and the laser light are emitted. Consisting of the lifting unit 240 to interconnect the unit 210 and at the same time to raise or lower the laser light emitting unit 210.

Subsequently, the laser light emitting unit 210 includes a light generator 214 that generates a laser beam therein, and is connected to the light generator 214 but protrudes from the inside to the outside to form a light source. It has a diverging groove 216 for emitting the generated light to the specimen (30).

In addition, in order for the laser body 200 to be lifted or lowered from the vertical plate 220, the laser body 200 has a nut groove 211 and the guide rod 244 to which the screw bolt 242 is connected. ) Has a fixing groove 212 is fixed to the top.

Subsequently, the vertical plate 220 has a screw groove 221 to which the screw bolt 242 is connected and a guide groove 222 to which the guide bar 244 is connected.

In particular, the rotational auxiliary piece 246 provided in the screw bolt 242, the user by holding the rotational auxiliary piece 246 and simply rotates to raise or lower the laser body 200, the laser The body 200 is raised or lowered from the vertical plate 220.

In addition, the horizontal plate 230, the numerical confirmation groove 232 is formed to enable the external confirmation of the numerical value surface 134 provided on the upper surface of the guide plate 132.

Subsequently, the numerical confirmation groove 232 is provided with the numerical surface 234 so as to contrast with the numerical value of the numerically listed surface 134 provided on the upper surface of the guide plate 132, and the laser body 200. The correct position of the

In addition, the numerical confirmation groove 232 is provided with a transparent window (not shown) made of a transparent synthetic resin separately, may be mounted on the numerical confirmation groove 232, and may be used by writing a numerical value in the transparent window. Do.

7 is a use state diagram showing a state of use of the specimen aligner according to the present invention.

Referring to FIG. 7, the specimen 30 having the notch 32 formed thereon is provided on the support rollers 110 and 110 ′, and the supports 120 and 120 ′ are formed according to the size of the specimen 30. It flows in the horizontal direction along the guide plate 132 is positioned.

At this time, the support (120, 120 '), a pair of the support (120, 120') according to the numerical value described in the numerical value surface 134 provided on the upper surface of the guide plate 132 a predetermined distance. It is desirable to be located mutually with respect to.

When the supporters 120 and 120 'are positioned by the numerically listed surface 134, the laser body 200 checks the numerical value through the numerically listed surface 134 to support the supporting body. It is located in the center between the support 120 located on the upper side of the 130 and the support 120 'located on the other side.

At this time, the laser body 200, the center is preferably located in the number 0 of the numerical column surface 134 formed on the upper surface of the guide plate 132, the number is larger in size toward the one side and the other side It is desirable that the numbers become smaller in size.

Thus, due to the identification of the numerically listed surface 134 and the operation of the laser body 200, whether the load body 190 imposes a repeated compressive load in the vertical direction to the notch 32 of the specimen 30 The action line of the load body 190 can be confirmed accurately.

In addition, the operation of the laser body 200 is to determine the reaction force line acting the bending reaction force generated in the specimen 30 when the load body 190 is applied to the specimen 30 repeatedly compressive load Therefore, more accurate test data results can be obtained with respect to the evaluation of the resistance against fatigue failure of the specimen 30.

For example, the number of the numerically listed surface 134 is described as 1, 2, 3, 4 ... as it goes toward the support 120 positioned on one side with respect to the laser body 200. It is preferable that the number of the numerically listed surface 134 be written as -1, -2.-3, -4 as the support 120 'is positioned.

In addition, the size of the number described in the numerical surface 234 provided in the horizontal plate 230 is preferably described to correspond to the number of the numerical surface (134).

As such, after the laser body 200 is positioned on the support body 130, light is generated by the light generator 214 of the laser light emitting unit 210 to emit light through the diverging groove 216. .

Subsequently, light emitted through the diverging groove 216 is irradiated in the vertical direction.

In this case, when the specimen 30 flows in the horizontal direction based on the light to be irradiated, and the notch 32 is positioned at the light to be irradiated, the specimen 30 is aligned.

In addition, since the support rollers 110 and 110 ′ supporting the specimen 30 are rotated only at a predetermined position, the specimen 30 can be easily flowed.

In addition, according to the height of the specimen 30, by rotating the rotation control piece 246 to change the vertical height of the laser light emitting unit 210, it is easier to align the specimen (30).

In some cases, the light emitted through the diverging groove 216 is irradiated vertically simultaneously from the top of the notch 32 of the specimen 30 to the numerically listed surface 134 provided on the upper surface of the guide plate 132. It is preferable to be able to maintain the state to become.

As such, when the specimen 30 is aligned in the correct position, the load body 190 provided on the specimen 30 imposes a repeated compressive load on the specimen 30.

Subsequently, when the specimen 30 is subjected to repeated compressive loads, the specimen 30 begins to fracture, and the degree of fatigue fracture is determined by the direction of the cracks 80 generated at the top of the notch 32. It is possible to check the size.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the scope of the present invention.

Therefore, the spirit of the present invention should not be limited to the embodiments described above, and all of the equivalents or equivalents of the claims, as well as the appended claims, are included in the scope of the spirit of the present invention. I will say.

30: Psalm 32: Notch
50: Bolt 80: Crack
100: jig 110, 110 ': jig roller
120, 120 ': Supporting 122, 122': Seating groove
124, 124 ': Sliding groove
130: support body 132: guide plate
133: coupling nut groove 134: numerically listed surface
190: load body
200: laser body 210: laser light emitting unit
211: nut groove 212: fixing groove
214: light generator 216: diverging groove
220: vertical plate 221: screw groove
222: Guide Home
230: horizontal plate 232: numerical confirmation groove
234: numerical surface 236: through nut groove
240: lifting portion 242: screw bolt
244: guide rod 246: rotation auxiliary

Claims (16)

Jig for supporting the specimen from the bottom for fatigue failure test subjected to repeated load;
A load body repeatedly applying a compressive load in the vertical direction from the center of the specimen;
And a laser body supported by the jig, the laser body checking the alignment of the specimen using a laser beam.
The method of claim 1,
The jig is,
A support roller having a pair of rod shapes to minimize the surface in close contact with the specimen;
Supporters for supporting the support rollers from the bottom so that the support rollers are rotatable,
Specimen aligner comprising a support body formed in the horizontal direction for supporting the support from the bottom.
The method of claim 2,
On the upper part of the support,
It is provided with a seating groove is seated so that the support roller is rotatable,
Under the support,
Specimen aligner, characterized in that the sliding groove is further provided to be movable or fixed in the horizontal direction while being connected to the upper support body.
The method of claim 3, wherein
The support body,
Specimen aligner is connected to the sliding groove of the support, characterized in that it comprises a guide plate that the support is movable or fixed.
The method of claim 4, wherein
The guide plate,
Specimens aligner further comprises a numerical column surface with numbers and scales that allow you to check the value from the outside.
The method of claim 1,
In the center of the specimen,
A specimen sorter comprising a notch grooved in a vertical direction.
The method of claim 1,
The load body,
Specimen aligner, characterized in that formed in the shape of a circular rod to apply a compressive load to the specimen while the surface in close contact with the specimen is minimized.
The method of claim 1,
The laser body,
A laser light emitting unit for emitting laser light in a direction perpendicular to the center of the specimen positioned horizontally;
A vertical plate formed in a vertical direction to support the laser light emitting unit at a lower portion thereof;
And a horizontal plate formed in a horizontal direction under the vertical plate and connected to the jig.
The method of claim 8,
The laser light emitting unit,
And a lifter configured to be liftable while being supported by the vertical plate.
The method of claim 9,
The elevating unit,
By being rotated while being connected to the laser light emitting unit and the vertical plate, a screw bolt for allowing the laser light emitting unit to be raised or lowered, and a guide rod that is formed in parallel with the screw bolt, interconnected to the laser light emitting unit and the vertical plate Specimen sorter comprising a.
The method of claim 10,
The screw bolt,
Specimens aligner further comprises a rotating auxiliary piece to be gripped from the outside.
The method of claim 10,
The laser light emitting unit,
Specimen aligner comprising a nut groove to be raised or lowered by the bidirectional rotation of the screw bolt, and the fixing groove is fixed to the top of the guide rod.
The method of claim 9,
The vertical plate,
Specimen aligner comprising a screw groove to be raised or lowered by the bidirectional rotation of the screw bolt, and a guide groove to guide the lower portion of the guide rod.
The method of claim 8,
The laser light emitting unit,
And a light generator provided therein to generate a laser beam, and a diverging groove for emitting light generated by the light generator to the outside.
The method of claim 8,
The horizontal plate,
Specimen aligner, characterized in that it further comprises a numerical confirmation groove formed in the vertical direction so that the numerical value described on the upper surface of the jig.
16. The method of claim 15,
Inside the numerical confirmation groove,
A specimen sorter, characterized in that it further comprises a numerical surface on which the numbers and scales to be identified externally.

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