Polishing system for cargo hold macro inspection

Abstract

The polishing system for cargo hold macro inspection according to the present invention comprises a bed unit on which a specimen is placed, a processing unit for processing the specimen, and a measuring unit adjacent to the processing unit for measuring the actual processing point of the specimen, wherein the processing unit may include a polishing module that is positioned in correspondence with the actual processing point of the measuring unit, faces the bed unit, and polishes the specimen, and a first driving unit for moving the polishing module. The present invention allows for polishing of a specimen to facilitate macro tissue examination.

Description

Technology Field

[0001] The present invention relates to a polishing system for inspecting cargo hold marks. Background Technology

[0002] Liquefied Natural Gas (LNG) is stored in onshore LNG tanks and transported by sea using LNG carriers equipped with cargo tanks. LNG tanks or LNG carrier cargo containment systems can be classified into independent tank types and membrane types (membrane-type LNG storage tanks).

[0003] Membrane-type LNG storage tanks are constructed by installing thermal insulation materials and are evaluated as being cheaper and allowing for free design modifications compared to independent tank types. Membrane-type LNG storage tanks feature a double-layer structure formed by attaching an insulation panel, which serves as a secondary barrier, to the inside, and a membrane, which is a thin metal material forming the inner wall surface, as a primary barrier. Corrugation membranes can be applied vertically in the longitudinal and transverse directions to provide tolerances that facilitate installation work while maintaining a low level of applied stress on the inner wall surface.

[0004] Meanwhile, when the corrugation membrane is installed on the inner wall of the tank, one end of the corrugation membrane overlaps with the other, and the overlapping portion is welded using a plasma automatic welding device or a manual TIG welding device to form a welding bead, thereby maintaining airtightness.

[0005] Therefore, the quality of the weld is critical to the stability of the LNG cargo tank, and operators performing the welding must possess the necessary qualifications. To obtain or maintain this qualification, a macroscopic examination is performed after conducting a test weld on a weld specimen. The problem to be solved

[0006] The problem that the present invention aims to solve is to provide a polishing system for cargo hold macro inspection that performs polishing on a specimen to facilitate macro tissue inspection.

[0007] The problems of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0008] One aspect of the polishing system for cargo hold macro inspection according to the present invention for achieving the above objective comprises a bed unit on which a specimen is placed, a processing unit for processing the specimen, and a measuring unit adjacent to the processing unit for measuring the actual processing point of the specimen, wherein the processing unit may include a polishing module that is positioned in correspondence with the actual processing point of the measuring unit, faces the bed unit, and polishes the specimen, and a first driving unit for moving the polishing module.

[0009] The present invention further comprises a frame unit in which the processing unit and the measuring unit are provided, wherein the frame unit comprises a table in which the bed unit is movable in a first direction, wherein the processing unit and the measuring unit are arranged in a line in the first direction, and each of the processing unit and the measuring unit moves in a second direction that is perpendicular to the horizontal plane with respect to the first direction and in a third direction that is perpendicular to the first direction, and when the bed unit is positioned on the table adjacent to the measuring unit rather than the processing unit, the measuring unit moves in the second direction such that the axis of the bed unit and the third direction are the same, and moves in the third direction to correspond to the height of the specimen to calculate a first measurement value which is the actual processing point as the coordinate of the specimen, and the position and level of the processing unit are set corresponding to the first measurement value so that the first driving unit can move the polishing module.

[0010] The present invention may further include a cooling water treatment unit that supplies cooling water to the specimen and recovers the cooling water.

[0011] The bed unit may include a tray-shaped bed with an open top, and a plurality of supports spaced apart from each other and facing one surface of the specimen so that the specimen is erected on the bed.

[0012] The bed unit may further include a clamp module having a ball screw having a length formed in a first or second direction and a block that moves in conjunction with the rotation of the ball screw and pushes against the other side or edge of the specimen.

[0013] Specific details of other embodiments are included in the detailed description and drawings. Effects of the invention

[0014] The polishing system for cargo hold macro inspection according to the present invention can facilitate polishing work for macro inspection of a specimen in a cargo hold, and the risk of injury to a worker can be reduced or prevented. Brief explanation of the drawing

[0015] FIG. 1 is a perspective view illustrating a polishing system for cargo hold mark inspection according to one embodiment of the present invention. FIG. 2 is a perspective view illustrating a bed unit of a polishing system for cargo hold macro inspection according to one embodiment of the present invention. FIG. 3 is a side view of a bed unit of a polishing system for cargo hold mark inspection according to one embodiment of the present invention. FIG. 4 is a drawing illustrating the variable position of a polishing module for a bed unit of a polishing system for cargo hold macro inspection according to one embodiment of the present invention. FIG. 5 is a drawing illustrating the state in which a specimen is in contact with a polishing module in the bed unit of a polishing system for cargo hold macro inspection according to one embodiment of the present invention. Figure 6 is a drawing illustrating area A of Figure 5. FIG. 7 is a drawing showing the processing unit and the measuring unit of a polishing system for cargo hold mark inspection according to one embodiment of the present invention positioned at the upper origin. FIG. 8 is a diagram illustrating the measurement unit of a polishing system for cargo hold mark inspection according to one embodiment of the present invention detecting an actual processing point. FIG. 9 is a drawing showing the bed unit of a grinding system for cargo hold mark inspection according to one embodiment of the present invention moved to a position facing the processing unit. FIG. 10 is a drawing showing the processing unit of a polishing system for cargo hold mark inspection according to one embodiment of the present invention moved to an offset point. FIG. 11 is a drawing showing the processing unit of a polishing system for cargo hold mark inspection according to one embodiment of the present invention moved to an actual processing point. Specific details for implementing the invention

[0016] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The advantages and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the attached drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0017] Each material possesses its own unique or special structure. Histological examination is performed because observing the structure allows one to determine the physical properties or characteristics of the material. The observation of the structure utilizes optical microscopes, electron microscopes, and / or atomic force microscopes, and the terms "microstructure" and "macrostructure" are used to describe the state of the structure. Here, images observed at magnifications of 5 to 2,000x using an optical microscope are referred to as microstructure, while macrostructure is used for images that are visible to the naked eye.

[0018] In the macro inspection method, one side of the specimen is ground or polished to facilitate observation of the cross-section. The polishing is performed slowly while cooling with running water to prevent the material from overheating due to frictional heat. After polishing, the specimen is washed with water and / or an alcohol solution, and then completely dried using a hair dryer.

[0019] Furthermore, mirror etching can be performed on the polished specimen to facilitate visual inspection—specifically, to make color differentiation clearer (when the specimen is etched, the colors of the welded area (structure exposed to welding heat) and the non-welded area (structure not exposed to welding heat) distinguishable). Mirror etching is performed by immersing the specimen in an etching solution suitable for microscopic examination, moving the specimen within the solution, and occasionally removing the specimen to observe the degree of etching. In macro inspection in the shipbuilding industry, if the etched surface becomes etched to a generally known state (clouded), the etching process is stopped and the specimen is washed with water. After soaking in alcohol, the mirror surface is dried using a hair dryer. Subsequently, in macro microstructure observation, the material is examined for defects and quality status by directly observing it with the naked eye or using a low-magnification magnifying glass.

[0020] For such macroscopic observation, the specimen is polished to a mirror surface by grinding or polishing, and the polishing system for cargo hold macroscopic inspection of this embodiment is provided to easily form a mirror surface on multiple specimens.

[0021] For reference, the size of the membrane material for the cargo tank (LNG carrier) can be provided in meters (m), for example, 1m x 3m. However, since the size is too large to be handled for use in welder testing, a separate training specimen of approximately 1m x 0.3m may be used.

[0022] Also, since the membrane has corrugations, it is difficult to cut the necessary parts, so the membrane is flattened by pressing the corrugations using equipment such as a press.

[0023] The flat sections, the hills of the corrugated sections, and the valleys of the corrugated sections are cut out to, for example, 50mm x 50mm or less by shearing with a press to create the cut shape of a specimen for welding inspection of the LNG membrane. The individual thickness of the membrane may be 5mm or less. When the membranes are installed widely in a grid pattern, two sheets are overlapped on the sides and four sheets are overlapped at the corners for each membrane sheet, thereby forming a barrier structure to prevent leakage.

[0024] To explain a comparative example compared to the present embodiment, ten specimens are polished in a mold (not shown) to polish specimens cut by shearing from test material. The operator must hold the specimens in place by hand to fix them in the mold, and the operator must continuously move manually to ensure the contact area is evenly distributed on the sandpaper during polishing by the rotation of the sandpaper.

[0025] Due to the loss of abrasive material from the sandpaper, the sandpaper is replaced about 3 to 4 times to grind one specimen unit (e.g., a bundle of 10 specimens). There is a risk of safety accidents as the worker's hands approach the structure used to rotate the sandpaper.

[0026] To improve upon the problems of these comparative examples, a polishing system for cargo hold mark inspection according to the present embodiment is provided.

[0027] The polishing system for cargo hold mark inspection will be described below with reference to the drawings. Furthermore, the first direction mentioned below refers to the X-axis direction, the second direction refers to the Y-axis direction which is perpendicular to the first direction in the horizontal plane, and the third direction refers to the Z-axis direction which is perpendicular to the first direction.

[0028] FIG. 1 is a perspective view illustrating a polishing system for cargo hold macro inspection according to one embodiment of the present invention, FIG. 2 is a perspective view illustrating a bed unit of a polishing system for cargo hold macro inspection according to one embodiment of the present invention, and FIG. 3 is a side view illustrating a bed unit of a polishing system for cargo hold macro inspection according to one embodiment of the present invention.

[0029] In addition, FIG. 4 is a drawing for explaining the variable position of a polishing module for a bed unit of a polishing system for cargo hold macro inspection according to one embodiment of the present invention, FIG. 5 is a drawing showing the state in which a specimen is in contact with the polishing module in the bed unit of a polishing system for cargo hold macro inspection according to one embodiment of the present invention, and FIG. 6 is a drawing showing area A of FIG. 5.

[0030] Referring to FIGS. 1 to 6, the polishing system (100) for cargo tank mark inspection is designed to smooth out uneven edges of a specimen (T) cut by a press mold, and may include a frame unit (110), a bed unit (120), a processing unit (130), a measuring unit (140), and a cooling water treatment unit (150).

[0031] The frame unit (110) is configured such that a processing unit (130) and a measuring unit (140) are installed and / or supported, and the processing unit (130) and the measuring unit (140) may be arranged in a row on the frame unit (110).

[0032] Here, the direction in which the processing unit (130) and the measuring unit (140) are arranged in a line is provided to coincide with the direction of movement of the bed unit (120) on which the specimen (T) is placed, for example, the processing unit (130) and the measuring unit (140) may be arranged in a line in the first direction (X) on the frame unit (110).

[0033] In other words, the bed unit (120) on which the specimen (T) is placed may be provided in a line in the direction in which the bed unit (120) moves (first direction (X)) so that after the actual processing point (P1) is measured by the measuring unit (140) at a position facing the measuring unit (140) in the vertical direction, the bed unit (120) moves to a position facing the processing unit (130) in the vertical direction so that the specimen (T) within the bed unit (120) is polished by the processing unit (130).

[0034] For example, the frame unit (110) may include a table (111) that allows the bed unit (120) to move in a first direction (X). The table (111) may be provided with a leveling module (113) whose height is adjusted according to the amount of screw fastening at corners / vertices for horizontal balance, and wheels (115) for ease of movement, and may be provided with an upper frame (111A) and a coolant splash guard (111B) on the top.

[0035] And the frame unit (110) may be provided with a second drive unit (117) that moves the bed unit (120) in a first direction (X). For example, the second drive unit (117) may have a linear motor mechanism applied, and a ball screw (not shown) that is rotated by a motor and extends in length in the first direction (X) from the table (111), and a moving block (not shown) that moves in the first direction (X) according to the rotation of the ball screw are provided, and the moving block is connected to the bed unit (120) and the bed unit (120) can be moved in the first direction (X) in conjunction with the movement of the moving block.

[0036] However, since this is merely one example, various structures are possible in which the bed unit (120) can move in the first direction (X). As another example, a wire, an endless belt and / or a chain may be connected to the bed unit (120) so that the movement of the bed unit (120) in the first direction (X) is controlled according to the rotation of a drum and / or a winch, etc.

[0037] A bed unit (120) can be used to place a specimen (T). The bed unit (120) can be provided so that the specimen (T) is placed / supported in a row without being scattered.

[0038] For example, the bed unit (120) may include a bed (121), a support (122), and a clamp module (123).

[0039] The bed (121) may be provided as a storage structure (e.g., in the form of a tray) with an open top so that the specimen (T) can be exposed. In addition, the bed (121) may have a number of perforations formed so that a fluid (e.g., cooling water or compressed air, etc.) can fall to the bottom.

[0040] And in the bed (121), supports (122) may be provided in a number spaced apart in a row in the first direction (X) so that multiple specimens (T) can be stored in an upright state in the first direction (X). In addition, supports (122) may be provided in a number in the second direction (Y) so that they can be provided in multiple rows (e.g., 3 rows).

[0041] And a water barrier (121A) may be provided around the bed (121) to prevent the cooling water from splashing out.

[0042] In addition, a dresser (121D) may be provided around the bed (121), and the dresser (121D) may be provided so that the spindle of the polishing unit (131) does not wear out and the polishing quality does not deteriorate.

[0043] For example, the dresser (121D) forms a unit with a separate second displacement measuring sensor (not shown), and before the processing unit (130) performs a polishing operation or before the next polishing operation, the second displacement measuring sensor and the dresser (121D) are positioned with the spindle of the polishing unit (131) in between and contact the spoons to measure the outer diameter of the spindle, thereby measuring the amount of wear on the spindle.

[0044] In this way, when the amount of wear on the spindle is measured by the dresser (121D), if the amount of wear is detected to be greater than a preset value, it can be displayed on a terminal (not shown) of the operator or a monitor (not shown) equipped in the frame unit (110).

[0045] The clamp module (123) can push the specimen (T) by contacting the other side or edge of the specimen (T), and one or more clamp modules (123) may be provided. For example, the clamp module (123) may include a first clamp (123C1).

[0046] The first clamp (123C1) is configured to press the specimen (T) against the first direction (X). For example, the first clamp (123C1) may include a ball screw (123BS) and a block (123M) that moves along with the rotation of the ball screw (123BS). The block (123M) is configured to push the specimen (T) from the opposite side of the support (122), and the block (123M) is spaced apart from the support (122) so that the specimen (T) is placed between them, but the gap between the block (123M) and the support (122) is adjusted according to the rotation of the ball screw (123BS) to press the specimen (T) against it.

[0047] Meanwhile, a second clamp (123C2) may be further provided. Since the second clamp (123C2) differs from the first clamp (123C1) only in that it is positioned in the second direction (Y) and the structure / mechanism for adhering to the specimen (T) may be the same, redundant descriptions will be omitted.

[0048] These bed units (120) can be moved in the first direction (X) by the second driving unit (117) and can be opposed in the vertical direction to each of the measuring units (140) and processing units (130) arranged in the first direction (X).

[0049] The processing unit (130) can process a specimen (T). For example, the processing unit (130) may include a polishing module (131) and a first driving unit (133A, 133B).

[0050] The polishing module (131) is configured to polish a specimen (T), and is provided with a circular spindle (e.g., a grinding stone) with a central axis formed in the second direction (Y), so that the specimen (T) can come into contact with the circumferential surface of the polishing module (131) to perform the polishing operation.

[0051] The polishing module (131) is connected to the first driving unit (133A, 133B) and moves in the second direction (Y) and / or the third direction (Z) by driving the first driving unit (133A, 133B), so that its position can be adjusted in correspondence with the actual processing point (P1) measured by the measuring unit (140).

[0052] That is, when the polishing module (131) is operated for polishing work, the actual processing point (P1) of the specimen (T) is measured by the measuring unit (140), and then the bed unit (120) moves in the first direction (X) so that the polishing module (131) faces the bed unit (120). Then, the height of the polishing module (131) facing the specimen (T) in the vertical direction is adjusted so that it comes into contact with the specimen (T), thereby allowing the specimen (T) to be polished.

[0053] The first driving unit (133A, 133B) can move the polishing module (131) in the second direction (Y) and the third direction (Z). For example, the first driving unit (133A, 133B) may include a first horizontal movement module (133A) and a first vertical movement module (133B).

[0054] The first horizontal movement module (133A) may be equipped with various structures / mechanisms that move the polishing module (131) in the second direction (Y), such as a linear motor, a gear module and a motor and / or an endless track belt.

[0055] The first vertical movement module (133B) may be equipped with various structures / mechanisms for moving the polishing module (131) in the third direction (Z), and may be identical / similar to the first horizontal movement module (133A), differing only in direction, and driven by a linear motor, gear module and motor and / or endless track belt.

[0056] The measuring unit (140) is used to measure the relative position between the processing unit (130) and the specimen (T) to detect the three-axis (e.g., X, Y, Z coordinates) position of the specimen (T) for adjusting the position of the processing unit (130) relative to the specimen (T), and can be adjacent to the processing unit (130) and can measure the actual processing point (P1) of the specimen (T).

[0057] For example, the measurement unit (140) may include a second horizontal movement module (141), a second vertical movement module (143), and a sensor unit (142).

[0058] The second horizontal movement module (141) can move the sensor unit (142) in the second direction (Y) by a mechanism identical or similar to the first horizontal movement module (133A), and a structure by a linear motor, a gear module and a motor and / or an endless track belt may be provided.

[0059] The second vertical movement module (143) may be equipped with various structures / mechanisms that move the sensor unit (142) in the third direction (Z) using the same / similar mechanism as the first vertical movement module (133B), and the drive by a linear motor, a gear module and a motor and / or an endless track belt may be the same / similar.

[0060] The sensor unit (142) may be provided with a displacement measuring sensor, so that the measurement unit (140) measures the distance value measured as it descends from the upper origin (B1), which is the initial value (e.g., origin before operation starts) of the processing unit (130) and the measurement unit (140), to the position where the measurement unit (140) comes into contact with the specimen (T), and thus the actual processing point (P1), which is the distance / position to which the processing unit (130) descended from the upper origin (B1) to the specimen (T), can be measured.

[0061] The sensor unit (142) may be provided in the form of a wide plate at the bottom so as to be in contact with a plurality of specimens (T), but is not limited thereto. In addition, it is preferable to provide a displacement measuring sensor so that automatic operation is possible without attaching a reflector to each specimen (T), but in this embodiment, the sensor unit (141) is not limited to being provided as a displacement measuring sensor, and various variations are possible, such as attaching a reflector to the specimen (T) and providing a corresponding distance sensor.

[0062] The cooling water treatment unit (150) is configured to supply and recover cooling water to the specimen (T) during a grinding operation, and may include, for example, a cooling water supply module (not shown) and a cooling water drain module (not shown).

[0063] The cooling water supply module can supply cooling water, such as water, to the specimen (T) during the grinding operation, that is, it can supply cooling water to the specimen (T) that is being ground in an upward and downward direction opposite to the processing unit (130).

[0064] For example, a coolant supply module may be provided with a tank in which coolant is stored and a nozzle through which coolant discharged from the tank is discharged.

[0065] In addition, a gas supply module (not shown) that supplies gas (e.g., compressed air) is provided adjacent to the cooling water supply module, so that cooling water and / or dust, etc., can be washed / dried by the gas during the processing of the specimen (T). For example, the gas supply module may perform an air shower operation by spraying air onto the specimen (T) after the grinding operation is completed, but is not limited thereto.

[0066] The coolant drain module can recover coolant that has fallen from the specimen (T) and is positioned in a vertically facing manner with respect to the processing unit (130) and the bed unit (120) to recover the coolant. For example, the coolant drain module may be provided as a drain tank and may be provided in the form of a box with an open top, but is not limited thereto.

[0067] As another example, various variations are possible, such as a hose (not shown) through which the material (cooling water and foreign matter, etc.) collected in the bed (121) passes to be discharged into a drain tank.

[0068] In addition, various variations are possible, such as the coolant drain module being provided with a roller rail (not shown) at the bottom of the drain tank so that the drain tank can be positioned in correspondence with the bed unit (120) or easily separated in an outward direction.

[0069] In a grinding system (100) for cargo tank macro inspection such as this, if the bed unit (120) is positioned on the table (111) so as to be adjacent to the measuring unit (140) rather than the processing unit (130), the measuring unit (140) moves in a second direction such that the axis of the third direction (Z) is the same as that of the bed unit (120) (or specimen (T)), and moves in the third direction (Z) such that it corresponds to the height of the specimen (T) within the bed unit (120) to calculate a first measuring value which is the coordinate of the specimen (T). Here, the first measuring value is the Y-axis and / or Z-axis coordinate of the specimen (T), and represents the previously mentioned actual processing point (P1).

[0070] To measure the first measurement value, the measurement unit (140) may apply sensor measurement through the sensor unit (142), and for example, the measurement unit (140) may descend so as to come into contact with the specimen (T), and the height at which it comes into contact with the specimen (T) may be measured as the height of the specimen (T).

[0071] When the first measurement value is derived, the position / level of the processing unit (130) is set in correspondence with the Y-axis and / or Z-axis coordinates of the specimen (T), which is the first measurement value, so that the polishing module (131) can be lowered to a position / height where it comes into contact with the specimen (T) and a polishing operation can be performed.

[0072] And the polishing operation of the polishing module (131) can be performed as a single unit, and the unit of specimens (T) to be polished as a set (1 set) can be performed on specimens (T) (e.g., 10 specimens) placed between one support (122) and one block (123M).

[0073] Accordingly, the first measurement value is measured in units of specimens (T) provided for each of the multiple columns (e.g., specimen 10), and the position of the processing unit (130) is adjusted in correspondence so that a polishing operation can be performed. That is, the first measurement value can be measured and the polishing operation performed in units of specimens arranged in rows and columns for the first clamp (123C1) and the second clamp (123C2), so that the first measurement value can be repeated to be measured for each of the first and second columns.

[0074] The operation of the polishing system (100) for inspecting cargo tank marks will be explained below with reference to the drawings.

[0075] FIG. 7 is a drawing showing the processing unit and the measuring unit of a cargo hold macro inspection polishing system according to an embodiment of the present invention positioned at the upper origin; FIG. 8 is a drawing showing the measuring unit of a cargo hold macro inspection polishing system according to an embodiment of the present invention detecting the actual processing point; FIG. 9 is a drawing showing the bed unit of a cargo hold macro inspection polishing system according to an embodiment of the present invention moved to a position facing the processing unit; FIG. 10 is a drawing showing the processing unit of a cargo hold macro inspection polishing system according to an embodiment of the present invention moved to an offset point; and FIG. 11 is a drawing showing the processing unit of a cargo hold macro inspection polishing system according to an embodiment of the present invention moved to the actual processing point.

[0076] The operation of the polishing system (100) for inspecting cargo tank marks is described with reference to FIGS. 7 to 11, but it should be noted that it is described with reference to FIGS. 1 to 6.

[0077] First, referring to FIGS. 1, 7 and 8, the measurement unit (140) can perform an operation to detect the actual processing point (P1).

[0078] To detect the actual processing point (P1), the measuring unit (140) can be operated to come into contact with the specimen (T). Here, the actual processing point (P1) refers to the coordinates (position and / or level) of the specimen (T) and represents a first measurement value measured by the measuring unit (140).

[0079] For example, the origin may be a location where the measuring unit (140) is located behind (or ahead of) the specimen (T) in the second direction (Y), but is not limited thereto, and any one of the specimens (T) in the first to third columns may be the origin of the measuring unit (140) in the second direction (Y).

[0080] When the measuring unit (140) is operated in the second direction (Y) by driving the second horizontal movement module (141) to move to a position opposite to the specimen (T) arranged in multiple rows in the vertical direction, it can move to the position of the specimen (T) located in the first row, for example.

[0081] In other words, movement in the second direction (Y) can be provided so that the sensor unit (142) moves to come into contact with the specimen (T) arranged in multiple rows.

[0082] In addition, the measurement unit (140) is positioned in the first to third column and moves, and the position of the bed (121) and / or the position between the support (122) and the block (123M) is set to a preset value, so that the operation of moving in the second direction (Y) is performed according to the preset value, but is not limited thereto.

[0083] When the sensor unit (142) faces the specimen (T) through the operation of the second horizontal movement module (141), the sensor unit (142) comes into contact with the specimen (T) through the operation of the second vertical movement module (143), so that the displacement measuring sensor can measure the displacement value of the actual processing point (P1) from the upper origin (B1) and derive the position of the actual processing point (P1).

[0084] Referring to FIG. 9, the measurement unit (140) measures the position of the actual processing point (P1), and then the sensor unit (142) returns to the upper origin (B1), and subsequently, or simultaneously, the bed (121) can move to a position facing the processing unit (130) by the operation of the second driving unit (117).

[0085] Subsequently, or simultaneously with the bed (121) moving to a position opposite the processing unit (130), the position of the polishing module (131) may be changed by the operation of the first horizontal movement module (133A) and the first vertical movement module (133B) of the processing unit (130).

[0086] Here, the second direction (Y) and third direction (Z) positions / coordinates of the first horizontal movement module (133A) and the first vertical movement module (133B) correspond to coordinate values ​​detected by the measurement unit (140), and the processing unit (130), which is equipped with the same upper origin (B1) in an equipment ready state, can operate in synchronization with the operation of the measurement unit (140).

[0087] For example, if the processing unit (130) moves 1 cm in the second direction (Y) and -3 cm in the third direction (Z), the processing unit (130) can also move 1 cm in the second direction (Y) and -3 cm in the third direction (Z) in the same way. However, the processing unit (130) may additionally set an offset point (S1), which is the position where the rotational movement of the polishing module (131) begins, in relation to the measuring unit (140).

[0088] That is, the offset point (S1) is a point that includes an offset value by setting a safety distance from the measured actual processing point (P1). For example, considering the safety distance from the measured actual processing point (P1), the polishing module (131) does not rotate when moving from the upper origin point (B1) to the offset point (S1), and the polishing module (131) can rotate from the offset point (S1) to the lower processing limit point (P2).

[0089] Referring to FIGS. 10 and 11, as the processing unit (130) descends from the upper origin (B1) to the actual processing point (P1), rotational driving for grinding can be started at an offset point (S1) set between the upper origin (B1) and the actual processing point (P1).

[0090] When the polishing module (131) starts rotating at the offset point (S1), and the polishing module (131) is lowered to the actual processing point (P1) to come into contact with the specimen (T) for polishing, the polishing module (131) may continue to rotate while lowering to the processing lower limit point (P2) (see FIG. 4 and FIG. 6), which is the height at which processing is completed for polishing.

[0091] Through this process, a plurality of specimens (T) can be polished, and a plurality of specimen (T) units provided in a unit can be polished by repeating the above-mentioned operation in multiple columns and multiple rows.

[0092] The polishing system (100) for cargo tank mark inspection according to such an embodiment can facilitate polishing work for inspecting a specimen mark of a cargo tank, and the risk of injury to a worker can be reduced / prevented.

[0093] Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention may be implemented in other specific forms without changing its technical concept or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. Explanation of the symbols

[0094] 100: Grinding system for cargo hold macro inspection 110: Frame Unit 120: Bed unit 130: Processing Unit 140: Measurement unit 150: Coolant treatment unit

Claims

Claim 1 The system includes a bed unit on which a specimen is placed; a processing unit for processing the specimen; and a measuring unit adjacent to the processing unit for measuring the actual processing point of the specimen, wherein the processing unit comprises: A polishing module whose position is adjusted in correspondence with the actual processing point of the above-mentioned measuring unit, which faces the above-mentioned bed unit, and which polishes the specimen; and A polishing system for cargo hold mark inspection comprising a first driving unit for moving the polishing module. Claim 2 A polishing system for cargo hold mark inspection according to claim 1, further comprising a frame unit having the processing unit and the measuring unit, wherein the frame unit includes a table such that the bed unit is movable in a first direction, wherein the processing unit and the measuring unit are arranged in a line in the first direction, and each of the processing unit and the measuring unit moves in a second direction that is perpendicular to the horizontal plane with respect to the first direction and in a third direction that is perpendicular to the first direction, and when the bed unit is positioned on the table adjacent to the measuring unit than to the processing unit, the measuring unit moves in the second direction such that the axis of the bed unit and the third direction are the same, and moves in the third direction to correspond to the height of the specimen to calculate a first measurement value which is the actual processing point as the coordinate of the specimen, and the position and level of the processing unit are set corresponding to the first measurement value so that the first driving unit moves the polishing module. Claim 3 A polishing system for cargo hold mark inspection according to claim 1, further comprising a cooling water treatment unit that supplies cooling water to the specimen and recovers the cooling water. Claim 4 A grinding system for cargo hold mark inspection according to claim 1, wherein the bed unit comprises: a tray-shaped bed with an open top; and a plurality of supports spaced apart from each other and facing one surface of the specimen so as to allow the specimen to be erected on the bed. Claim 5 A grinding system for cargo hold mark inspection according to claim 4, wherein the bed unit further comprises a ball screw having a length formed in a first direction or a second direction and a clamp module having a block that moves in conjunction with the rotation of the ball screw and pushes against the other face or edge of the specimen.

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