KR102388485B1 - Linear heating test apparatus and linear heating test method - Google Patents

Abstract

The present invention relates to a linear heating test apparatus and a linear heating test method capable of testing the linear heating of a specimen, and a support for supporting the lower surface of a plate-shaped specimen by at least dead point support, and the position of the support A control unit for adjusting the control unit, and a heating unit installed to be reciprocally movable in a straight path above the specimen supported by the support unit to perform linear heating of the specimen a plurality of times along a preset straight heating line and a measuring unit for measuring the angular strain of the specimen deformed by linear heating at the side of the specimen supported by the support unit, and between the heating wire portion of the upper surface of the specimen and the heating unit when the specimen is linearly heated a plurality of times The control unit may include a control unit for controlling the position of the support unit by controlling the control unit according to the amount of angular deformation of the specimen applied from the measurement unit so that the separation distance is maintained constant.

Description

Linear heating test apparatus and linear heating test method

The present invention relates to a shipboard heating test apparatus and a shipboard heating test method, and more particularly, to a shipboard heating test apparatus and a shipboard heating test method capable of testing a shipboard heating of a specimen.

It is essential to use a steel sheet processed into a curved shape when building a ship, and the curved shape of the steel sheet may be processed by cold working or hot working. In general, cold working is used in the primary processing of a gentle and simple form of a shell plate having a certain curvature in only one direction using a press or roller, and hot working is used for secondary processing of the shell plate and welding deformation removal work This hot working is called a linear heating method.

The linear heating method is a method of locally heating the surface of a steel sheet using a gas flame torch and processing it into a desired shape by using the property of shrinkage during cooling. focus is on

In particular, in the case of an automatic linear heating test device for securing the linear heating characteristics and test conditions of heavy plates for shipbuilding, many devices have been developed in the past. Therefore, it was difficult to measure the amount of deformation. In addition, measuring the angular strain of the specimen according to the number of heating while linearly heating the same point of the specimen using an automatic device for research purposes is difficult as the specimen deforms more and more depending on the number of heating, making it difficult to measure the angular strain of the specimen Rather, it was difficult to fix the specimen where deformation occurred and to heat the same point again in the same manner under the same conditions.

The present invention is to solve various problems including the above problems, and when the linear heating specimen is repeatedly heated in a linear manner, the specimen in which deformation is accumulated is stably fixed, and in the repeated linear heating test, the heat source is the same as in the previous test An object of the present invention is to provide a linear heating test apparatus and a linear heating test method that can easily adjust the position of the specimen so that it can be added as a condition, and can easily measure the angular strain of the specimen. However, these problems are exemplary, and the scope of the present invention is not limited thereto.

According to an embodiment of the present invention, a shipboard heating test apparatus is provided. The linear heating test apparatus, at least a support part for supporting the lower surface of the plate-shaped specimen by the dead point support; an adjustment unit for adjusting the position of the support unit; a heating unit installed so as to be reciprocally movable in a straight path above the specimen supported by the support unit to perform linear heating of the specimen a plurality of times along a preset straight heating line; a measuring unit for measuring the angular strain of the specimen deformed by linear heating at a side of the specimen supported by the support unit; and controlling the adjusting unit according to the amount of angular deformation of the specimen applied from the measuring unit so that the separation distance between the heating wire portion of the upper surface of the specimen and the heating unit is constantly maintained when the specimen is heated in a line a plurality of times. and a control unit for adjusting the position of the support unit.

According to an embodiment of the present invention, the support portion, a plurality of support rods formed in a rod shape, at least four are arranged in a square shape to support the lower surface of the specimen; and a support plate on which each of the plurality of support bars is movably supported in the front and rear directions or laterally so that an interval between the plurality of support bars can be adjusted.

According to an embodiment of the present invention, the plurality of support rods may have a sphere-shaped specimen pedestal formed at an upper end thereof to support the specimen by point contact.

According to an embodiment of the present invention, the adjusting unit, a height adjuster for supporting the support plate of the support unit to elevate and lower; and a position adjusting bar for movably supporting the height adjusting bar on the base plate to the front and rear or to the side.

According to an embodiment of the present invention, the measuring unit, the measuring rod is formed in the shape of a rod and installed on one side of the support; a first laser irradiator installed to be movable up and down along the measuring rod with respect to the specimen and irradiating a first laser beam toward the specimen; and a second laser irradiator installed below the first laser irradiator to be movable up and down along the measuring rod with respect to the specimen to irradiate a second laser beam toward the specimen.

According to an embodiment of the present invention, the control unit is positioned so that the first laser beam coincides with the uppermost end of the specimen on the measuring rod when the amount of angular deformation of the specimen that is linearly heated and has a curved surface is measured. A distance between the first laser irradiator and the second laser irradiator positioned so that the second laser beam coincides with the lowermost end of the specimen may be applied as the angular strain.

According to another embodiment of the present invention, there is provided a shipboard heating test method. The linear heating test method includes: a specimen preparation step of seating the specimen on the support; an initial angular strain measurement step in which the measuring unit first measures the angular strain amount of the specimen; a specimen alignment step of controlling the adjusting unit to align a distance and a position between the specimen supported on the support unit and the heating unit; a heating step of linearly heating the specimen while the heating unit moves along the heating wire; a cooling step of cooling the linearly heated specimen; and a linear heating angular strain measuring step of measuring the amount of angular deformation of the specimen in which the curved surface has been deformed by linear heating.

According to another embodiment of the present invention, after the linear heating angular strain measurement step, a test number check step of checking whether the preset number of linear heating tests is satisfied; may further include.

According to another embodiment of the present invention, in the step of confirming the number of tests, if the number of tests is satisfied, the on-board heating test is terminated, and if the number of tests is less than the number of tests, the control unit is controlled to control the control unit and the specimen supported on the support unit and After the rearrangement step of rearranging the spacing and positions of the heating units, the heating step may be repeated again.

According to another embodiment of the present invention, in the realignment step, the distance and position between the specimen and the heating unit in which the curved deformation has occurred are the same as the interval and position between the specimen and the heating unit aligned in the specimen alignment step. , it is possible to align the specimen in which the curved surface has been deformed by controlling the adjusting unit.

According to an embodiment of the present invention made as described above, when the specimen is supported by at least dead point support and the linear heating specimen is repeatedly heated using a position-adjustable support portion, the specimen in which deformation is accumulated is stably stored. It is fixed and the position of the specimen can be easily adjusted so that the heat source can be applied under the same conditions as in the previous test during the repeated linear heating test. In addition, it is possible to implement a linear heating test apparatus and a linear heating test method that can easily measure the angular strain of a deformed specimen using a laser irradiation device. Of course, the scope of the present invention is not limited by these effects.

1 and 2 are cross-sectional views schematically showing an on-board heating test apparatus according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view schematically illustrating a heating wire in which a specimen is heated in a linear manner in the linear heating test apparatus of FIG. 1 .
4 and 5 are cross-sectional views schematically showing the process of measuring the angular strain of the specimen deformed by linear heating in the linear heating test apparatus of FIG. 1 and the process of adjusting the separation distance between the specimen and the heating unit by adjusting the position of the support admit.
6 is a flowchart sequentially illustrating a method for heating a ship according to another embodiment of the present invention.

Hereinafter, several preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Examples of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art, and the following examples may be modified in various other forms, and the scope of the present invention is as follows It is not limited to an Example. Rather, these embodiments are provided so as to more fully and complete the present disclosure, and to fully convey the spirit of the present invention to those skilled in the art. In addition, in the drawings, the thickness or size of each layer is exaggerated for convenience and clarity of description.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically illustrating ideal embodiments of the present invention. In the drawings, variations of the illustrated shape can be envisaged, for example depending on manufacturing technology and/or tolerances. Accordingly, embodiments of the spirit of the present invention should not be construed as limited to the specific shape of the region shown in the present specification, but should include, for example, changes in shape caused by manufacturing.

1 and 2 are cross-sectional views schematically showing the front and side surfaces of the on-board heating testing apparatus 100 according to an embodiment of the present invention, and FIG. is a cross-sectional view schematically showing And, FIGS. 4 and 5 show the process of measuring the angular strain of the specimen S deformed by linear heating in the linear heating test apparatus 100 of FIG. Cross-sectional views schematically illustrating a process of adjusting the separation distance H1 between the heating units 30 .

First, as shown in FIGS. 1 and 2 , the on-board heating test apparatus 100 according to an embodiment of the present invention is, largely, the support part 10 , the adjustment part 20 , and the heating part 30 . and a measuring unit 40 and a control unit (not shown).

1 and 2 , the support part 10 may support the lower surface of the specimen S having a plate shape by at least dead point support.

For example, the support portion 10 is formed in a rod shape, and at least four are arranged in a square shape to support the lower surface of the specimen S and the spacing d1 and d2 between the plurality of support rods 11 and the plurality of support rods 11 . ) can be adjusted, each of the plurality of support rods 11 may include a support plate 12 that is supported movably in the front and rear or laterally.

More specifically, in the plurality of support rods 11 , a sphere-shaped specimen pedestal 11a may be formed at the upper end of the rod shape to support the specimen S by point contact.

As such, the specimen (S) is not prevented from being deformed during linear heating by the heating unit 30 to be described later by the heating unit 30, which will be described later, because the lower surface thereof is supported at four points in point contact by the plurality of support rods 11, and the curved surface is deformed. However, it can be stably supported.

In addition, the plurality of support rods 11, although not shown, are supported on the support plate 12 by the LM guide and are installed to be linearly movable, respectively, so that each of them is linearly linear in the front and rear or sideways on the support plate 12. It is movably supported, and the spacing (d1, d2) between each support bar can be freely adjusted.

Accordingly, when the specimen S is in the initial state of a plate shape, the intervals d1 and d2 between the plurality of support rods 11 are widened to stably support the specimen by dead point support, and then the specimen is heated by linear heating. When the deformation of the curved surface of (S) occurs, it is possible to stably support the deformed specimen (S) by reducing the spacing (d1, d2) between the plurality of support rods (11). At this time, the plurality of support rods 11 are four, but are not necessarily limited thereto, but are not limited thereto, and an even number of pieces capable of stably supporting the specimen S, such as six or eight, are provided. Combinations can be formed in various ways.

Also, the adjusting unit 20 may adjust the position of the supporting unit 10 supporting the specimen S. For example, the adjustment unit 20, the height adjustment rod 21 and the base plate 23 for supporting the support plate 12 of the support portion 10 to be raised and lowered, the height adjustment rod 21 on the front and rear or sideways. It may include a position adjuster 22 for movably supporting it.

For example, although not shown, the height adjusting bar 21 and the position adjusting bar 22 are installed to be connected to a linear actuator, such as a linear actuator, a hydraulic cylinder, or a pneumatic cylinder, and can perform a linear motion. Accordingly, the position adjuster 22 installed on the base plate 23 can linearly move the support unit 10 forward, backward or laterally, and the height adjuster 21 installed on the position adjuster 22 . ) may linearly move the support 10 in the vertical direction.

In addition, the heating unit 30 is installed reciprocally in a straight path above the specimen S supported by the support unit 10, and as shown in FIG. 3, a preset straight heating wire ( HL), it is possible to linearly heat the specimen S a plurality of times.

For example, the heating unit 30 is linear to the specimen S while moving along a straight heating line HL using a heat source such as a gas torch, a high frequency induction heating device, or a laser heating device. By applying heat in the path of

The shrinkage and expansion in hot working using the heating unit 30 have physical/mechanical properties that do not occur with a specific directionality. In the hot working process, the intended curved surface can be manufactured only by inducing or suppressing deformation in a specific direction. In addition to having to input an appropriate amount of heat to the system, a compulsory boundary condition may be necessarily required at an appropriate location.

Accordingly, hot working using the heating unit 30 may be performed by drawing a heating wire HL at an appropriate position on the specimen and then applying appropriate heat along the heating wire HL. At this time, when the specimen (S) is linearly heated a plurality of times, the adjustment unit 20 is adjusted every time the linear heating is repeated so that a certain amount of heat can be input to the specimen (S) according to the deformation of the curved surface of the specimen (S). 10) by adjusting the position, it is possible to adjust the separation distance H1 between the specimen S and the heating unit 30 according to the deformation of the specimen S to be constant.

In addition, as shown in FIG. 4 , the measurement unit 40 may measure the angular strain of the specimen S that is curved by linear heating from the side of the specimen S supported by the support 10 .

For example, the measurement unit 40 is formed in a rod shape and installed to be movable up and down along the measurement rod 41 based on the measurement rod 41 and the specimen S installed on one side of the support portion 10 . A first laser irradiator 42 for irradiating a first laser beam B1 toward the specimen S and a first laser irradiator 42 to be movable up and down along the measuring rod 41 based on the specimen S ), it may include a second laser irradiator 43 for irradiating a second laser beam (B2) toward the specimen (S).

At this time, the control unit electrically connected to the measuring unit 40 and the adjusting unit 20 is between the heating wire (HL) portion of the upper surface of the specimen (S) and the heating unit (30) when the specimen (S) is heated in line a plurality of times. The position of the support part 10 may be adjusted by controlling the adjusting part 20 according to the amount of angular deformation of the specimen S applied from the measuring part 40 so that the separation distance H1 may be constantly maintained.

More specifically, when measuring the amount of angular deformation of the specimen (S) that is heated in a linear manner and has a curved surface, on the measuring rod 41, the first laser beam (B1) coincides with the uppermost end of the specimen (S). After adjusting the position of the irradiator 42, and adjusting the position of the second laser irradiator 43 so that the second laser beam B2 coincides with the lowest end of the specimen S, the first laser irradiator 42 and the first The distance D between the two laser irradiators 43 may be calculated as the angular deformation amount.

At this time, the interval D between the first laser irradiator 42 and the second laser irradiator 43 is manually input to the control unit by the operator directly reading the scale displayed on the measuring rod 41, or the control unit is measured It may be electrically connected to the unit 40 to automatically recognize the distance D between the first laser irradiator 42 and the second laser irradiator 43 .

Accordingly, the control unit is positioned so that the first laser beam B1 coincides with the uppermost end of the specimen S on the measuring rod 41 when measuring the amount of angular deformation of the specimen S, which is heated in a linear manner and has a curved surface. The first laser irradiator 42 and the second laser beam B2 to be applied as the amount of angular deformation is the interval D between the second laser irradiator 43 positioned so as to coincide with the lowest end of the specimen S, and the angle The position of the support part 10 supporting the specimen S may be adjusted by controlling the adjusting part 20 according to the amount of deformation.

For example, as shown in FIG. 4 , when the heating unit 30 applies heat to the specimen S while moving along the heating wire HL to perform linear heating, a concave curved surface deformation occurs in the specimen S. As the heating wire (HL) portion of (S) descends, the separation distance (H2) between the heating wire (HL) portion of the upper surface of the specimen (S) and the heating unit 30 may be increased.

Subsequently, the measuring unit 40 measures the amount of angular deformation of the curved specimen S and when the control unit receives it, as shown in FIG. 5 , the control unit controls the adjusting unit 30 to adjust the height. By driving at least one of the stand 21 and the position adjusting bar 22, the separation distance H1 between the heating wire HL portion of the upper surface of the specimen S and the heating unit 30 is adjusted to be the same as the initial state. can

Therefore, according to an embodiment of the present invention, the linear heating test apparatus 100 supports the specimen (S) by at least a dead point support and using the position-adjustable support portion 10, the linear heating specimen (S) In the case of repeated linear heating, the specimen (S) in which deformation is accumulated can be stably fixed. In addition, the position of the specimen (S) can be easily adjusted so that the heat source can be applied under the same conditions as in the previous test during the repeated linear heating test, and the upper and lower ends of the deformed specimen (S) using a laser irradiation device By measuring accurately, it is possible to accurately measure the angular strain of the specimen (S).

Hereinafter, the above-described shipboard heating test method using the shipboard heating test apparatus 100 will be described.

6 is a flowchart sequentially illustrating a method for heating a ship according to another embodiment of the present invention.

First, as shown in Figure 6, the linear heating test method according to another embodiment of the present invention is largely, the specimen preparation step (S10), the initial angular strain measurement step (S20), the specimen alignment step (S30) and , a heating step (S40) and a cooling step (S50), a linear heating angular strain measurement step (S60), and a test number check step (S70).

For example, in the linear heating test method, the specimen preparation step (S10) of seating the specimen (S) on the support portion (10), and the first angular deformation in which the measuring unit (40) measures the angular deformation of the first specimen (S) A measuring step (S20), a specimen alignment step (S30) of aligning the distance and position between the specimen (S) supported on the support unit (10) and the heating unit (30) by controlling the adjusting unit (20) (S30), and the heating unit A heating step (S40) of linearly heating the specimen (S) while the 30 moves along the heating wire (HL), a cooling step (S50) of cooling the linearly heated specimen (S), and a curved surface by linear heating After the linear heating angular strain measurement step (S60) and the linear heating angular strain measurement step (S60) for measuring the angular strain of the deformed specimen (S), the number of tests to check whether the preset number of linear heating tests is satisfied (S70) ) can be proceeded in that order.

At this time, as shown in FIG. 6, in the test number check step (S70), if the test number is satisfied, the on-board heating test is terminated (S90), and if it is less than the test number, the control unit 20 is controlled to After the rearrangement step (S80) of rearranging the spacing and position of the specimen (S) supported on the support unit ( 10 ) and the heating unit ( 30 ), the heating step ( S40 ) may be repeated again.

More specifically, in the realignment step (S80), the distance and the position between the specimen (S) and the heating unit (30) in which the curved surface deformation has occurred, the specimen (S) and the heating unit (30) aligned in the specimen alignment step (S30) It is possible to rearrange the specimen S in which the curved surface has been deformed by controlling the adjusting unit 20 so as to be the same as the interval and position between them.

Therefore, in the linear heating test method according to another embodiment of the present invention, during the repeated linear heating test of the specimen (S), the heat source can be added under the same conditions as in the previous test, during repeated linear heating of the specimen (S) By adjusting the position of the specimen (S) every time, it is possible to increase the accuracy of the linear heating test of the specimen (S).

Although the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: support
11: Multiple support rods
12: support plate
20: control unit
21: height adjuster
22: position adjuster
23: base plate
30: heating unit
40: measurement unit
41: measuring rod
42: first laser irradiator
43: second laser irradiator
S: Psalm
HL: heating wire
100: shipboard heating test device

Claims (10)

a support part for supporting the lower surface of the plate-shaped specimen by at least dead point support;
an adjustment unit for adjusting the position of the support unit;
a heating unit installed so as to be reciprocally movable in a straight path above the specimen supported by the support unit to perform linear heating of the specimen a plurality of times along a preset straight heating line;
a measuring unit for measuring the angular strain of the specimen deformed by linear heating at a side of the specimen supported by the support unit; and
When the specimen is heated in line a plurality of times, the adjusting unit is controlled according to the amount of angular deformation of the specimen applied from the measuring unit so that the separation distance between the heating wire portion of the upper surface of the specimen and the heating unit can be constantly maintained. Including; a control unit for adjusting the position of the support part;
The measurement unit,
a measuring rod formed in a rod shape and installed on one side of the support part;
a first laser irradiator installed to be movable up and down along the measuring rod with respect to the specimen to irradiate a first laser beam toward the specimen; and
a second laser irradiator installed below the first laser irradiator to be movable up and down along the measuring rod with respect to the specimen to irradiate a second laser beam toward the specimen;
Including, a shipboard heating test device. The method of claim 1,
The support part,
a plurality of support rods formed in a rod shape, at least four of which are arranged in a square shape to support a lower surface of the specimen; and
a support plate on which each of the plurality of support bars is movably supported in the front and rear directions or laterally so that an interval between the plurality of support bars can be adjusted;
Including, a shipboard heating test device. 3. The method of claim 2,
The plurality of support rods,
In order to support the specimen by point contact, a sphere-shaped specimen pedestal is formed on the upper end, a linear heating test apparatus. 3. The method of claim 2,
The control unit,
a height adjustment bar for supporting the support plate of the support unit to be elevated; and
a position adjusting bar for movably supporting the height adjusting bar on the base plate to the front and rear or to the side;
Including, a shipboard heating test device. delete The method of claim 1,
The control unit is
When measuring the amount of angular deformation of the specimen that is linearly heated and has a curved surface, the first laser irradiator and the second laser beam positioned so that the first laser beam coincides with the uppermost end of the specimen on the measuring rod are The distance between the second laser irradiator positioned to coincide with the lowermost end of the specimen is applied as the amount of angular deformation, a linear heating test apparatus. [Claim 7] In the shipboard heating test method for testing the specimen using the shipboard heating test apparatus according to any one of claims 1, 2, 3, 4 and 6,
a specimen preparation step of seating the specimen on the support;
an initial angular strain measurement step in which the measuring unit first measures the angular strain amount of the specimen;
a specimen alignment step of controlling the adjusting unit to align a distance and a position between the specimen supported on the support unit and the heating unit;
a heating step of linearly heating the specimen while the heating unit moves along the heating wire;
a cooling step of cooling the linearly heated specimen; and
Linear heating angular strain measuring step of measuring the amount of angular deformation of the specimen in which the curved surface has been deformed by linear heating;
Including, shipboard heating test method. 8. The method of claim 7,
After the linear heating angular strain measurement step, a test number checking step of confirming whether the preset number of linear heating tests is satisfied;
Further comprising, a shipboard heating test method. 9. The method of claim 8,
In the step of confirming the number of tests,
When the number of tests is satisfied, the on-board heating test is terminated, and when the number of tests is less than the number of tests, the heating step after the rearrangement step of realigning the spacing and position of the specimen supported on the support and the heating part by controlling the adjusting part from the heating step Repeatable, shipboard heating test method. 10. The method of claim 9,
The rearrangement step is
Aligning the specimen with curved deformation by controlling the adjusting unit so that the distance and position between the specimen and the heating unit in which the curved deformation has occurred are the same as the interval and the position between the specimen and the heating unit aligned in the specimen alignment step which is a shipboard heating test method.

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