KR20090062465A - Manufacturing method of plate-stiffener assembly and a plate-stiffener assembly formed using the same - Google Patents

Manufacturing method of plate-stiffener assembly and a plate-stiffener assembly formed using the same Download PDF

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Publication number
KR20090062465A
KR20090062465A KR1020070129734A KR20070129734A KR20090062465A KR 20090062465 A KR20090062465 A KR 20090062465A KR 1020070129734 A KR1020070129734 A KR 1020070129734A KR 20070129734 A KR20070129734 A KR 20070129734A KR 20090062465 A KR20090062465 A KR 20090062465A
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KR
South Korea
Prior art keywords
plate
reinforcement
manufacturing
stiffener
welding
Prior art date
Application number
KR1020070129734A
Other languages
Korean (ko)
Inventor
백점기
Original Assignee
부산대학교 산학협력단
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Priority to KR1020070129734A priority Critical patent/KR20090062465A/en
Publication of KR20090062465A publication Critical patent/KR20090062465A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
    • B23K20/126—Workpiece support, i.e. backing or clamping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/129—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding specially adapted for particular articles or workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
    • B23K20/227—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded with ferrous layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
    • B23K20/233—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/24—Frameworks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/18—Dissimilar materials

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

A plate-stiffener assembly and a manufacturing method thereof are provided to reduce thermal transformation, residual stress, and softening resulting from welding. A manufacturing method of a plate-stiffener assembly(100) comprises a step of preparing a rigid body support(130) with a stiffener receiving part(130a) inside to receive a stiffener(110), a step of fixing the stiffener in the stiffener receiving part of the rigid body support, a step of uniting a plate material(120) to one end of the fixed stiffener, and a step of performing friction-stir-welding along the combining surface between the plate material and the stiffener. The stiffener is composed of a web(112) arranged in the center and upper and lower flanges(114,116) formed on the top and bottom of the web.

Description

Manufacturing method of plate-stiffener assembly and a plate-stiffener assembly formed using the same}

The present invention relates to a method of manufacturing a metal reinforcing plate structure, and more particularly, a method of manufacturing a plate-reinforcement assembly by bonding a plate and a reinforcement having different material properties by friction stir welding and a plate-reinforcement produced thereby. It is about assembly.

Metal reinforcement plate structure is widely used as a major member of various industrial products, including ships, offshore structures, and their manufacturing method can be divided into two. The first method is a method of joining a plate and a reinforcement by fillet welding, and the second is a butt welding of a plate-stiffener assembly which is integrally manufactured by extrusion. It is a method of bonding by Butt welding. 1 to 3 are diagrams for explaining a method of manufacturing such a conventional plate-stiffener assembly. Figure 1 shows the method by fillet welding described above, Figure 2 shows the method by butt welding. The former method is the most widely used method when using a general gas welder such as arc welding, MIG welding, TIG welding, and the like. In FIG. 1, reference numeral 10 is a plate, 12 is a reinforcement, and 14 is a fillet weld surface. The latter is an applicable method when the plate and the reinforcement have the same material properties as each other, and joins the plate-reinforcement assembly prepared by extrusion in the butt portion at the plate portion. In FIG. 2, reference numeral 20 is a plate, 22 is a reinforcing material, 24 is a friction stir welding surface, and 26 is a friction stir welding machine.

In the case of using the conventional gas welding machine, the welding is performed at a high temperature of 1200 ° C. or higher, and thus, deformation of the base metal, residual stress, and the like occur in the manufacturing process, causing serious problems in strength and safety of the manufactured structure. In particular, when the aluminum reinforcing plate structure is manufactured by this method, there is a problem in that the strength of the strength is further weakened because the phenomenon of softening of the weld part occurs in addition to the welding deformation and residual stress. In order to overcome this problem, friction stir welding has recently been in the spotlight. In this method, since welding is performed at a relatively low temperature of 500 ° C. or less, welding defects such as welding deformation and residual stress generated in the gas welding method are less likely to occur, and welding heat, which has been a problem in the fabrication of aluminum reinforcing plate structures, is particularly problematic. Softening in the heat affected zone can also be alleviated. However, such friction stir welding has been applied only to the fabrication of a reinforcing plate structure by butt welding of a plate-reinforcement assembly prepared by extrusion in advance, due to the characteristics of the welding method. When the plate-reinforcement assembly used in FIG. 2 is formed by extrusion method, the plate part and the reinforcement part should be made of a metal having the same physical properties and the plate material and the reinforcing material having different physical properties are integrally formed by the extrusion method. It is impossible to form with. However, in various industrial structures including ships, it is common for the plate and the reinforcement to be composed of materials having different physical properties. For example, the plate of the reinforcement plate structure is made of mild steel and the reinforcement is made of high tensile steel. Further, in the aluminum reinforcing plate structure, the plate material is made of 5083 material and the reinforcing material is made of 6082 or the like material.

3 shows a method of manufacturing a conventional plate-stiffener assembly in view of this practical need. Here, first, a plate-reinforcement assembly composed of the plate 30 and the reinforcement 32 is formed of a material having the same physical properties, and then welded and bonded to the plate 40 having the different physical properties. Reference numeral 34 denotes a weld face and 36 denotes a welder. However, this method requires an additional process of cutting the plate 40 of the reinforcement plate structure into multiple plates, that is, strips, and there is a possibility that additional structural defects such as initial deformation may occur in this process. Is difficult.

Considering the recent increase in the construction demand of aluminum ultra-high speed ship structures, even if the material properties of the plate and the reinforcement materials are different, the welding plate, the residual stress and the softening phenomenon occur less, and the new plate is fast and reliable. The manufacturing method of the reinforcement is urgently required.

The present invention has been conceived to solve the above-mentioned conventional problems, the technical problem of the present invention compared to the prior art of the plate-reinforcement structure that can significantly improve the degree of thermal deformation, residual stress and softening phenomenon by welding It is to provide a production method.

In addition, the present invention is to provide a method of manufacturing a plate-reinforcement structure for quickly and securely joining a plate and a reinforcement made of a material having different physical properties.

Another object of the present invention is to provide a plate-reinforcement assembly manufactured by the above-described plate-reinforcement manufacturing method.

In order to solve the above technical problem, in the present invention, in the method of manufacturing a plate-reinforcement assembly by welding the plate and the reinforcement, preparing a rigid support formed with a reinforcing member receiving portion as a space to accommodate the reinforcement therein And fixing and supporting the reinforcing member by the reinforcing member accommodating part of the rigid support, coupling the plate to one end of the fixed reinforcing material, and friction stir welding along the coupling line between the one end of the reinforcing material and the plate. It provides a plate-stiffener assembly manufacturing method comprising the step.

Here, one end of the reinforcing material may be temporarily attached to the plate using an adhesive.

The reinforcing material is preferably composed of a central web and a flange portion formed on the upper and lower ends of the web.

The reinforcing member accommodating portion formed in the rigid support may be formed to have a shape corresponding to the cross-sectional shape of the reinforcing material.

The reinforcing material and the plate may be formed of different kinds of metals having different material properties.

The reinforcing material is preferably formed by extrusion molding.

According to another aspect of the present invention there is provided a plate-reinforcement assembly manufactured by the above-described method.

According to the present invention, it is possible to manufacture a plate and a reinforcement having different physical properties as a plate-reinforcement assembly while minimizing welding deformation, residual stress, and softening association, thereby improving the material properties of the reinforcing plate structure and There is an advantage that it can meet the demand of heterogeneous material reinforcement plate structure.

In addition, the reinforcement produced by extrusion molding can be stably bonded to the plate without cutting the plate as it has the advantage that the process is fast and can prevent the initial deformation of the material due to the cutting of the plate.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Figure 4 is a view for explaining a plate-reinforcement assembly manufacturing method according to an embodiment of the present invention, Figure 5 is a view for explaining a plate-reinforcement assembly manufacturing method according to another embodiment of the present invention. The difference between the two is that the shape of the reinforcing member accommodating portion 130a to be described later is different, the other configuration is the same.

Looking at the main constituent members required to practice the present invention, the reinforcement 110 is produced by the extrusion molding method, the plate 120 to which the reinforcement 110 is bonded, fixing the support of the reinforcement 110 during welding Rigid support for the 130 and friction stir welding machine 140 is required.

As shown in the drawing, the reinforcing member 110 includes an intermediate web 112 and upper and lower flanges 114 and 116 formed at upper and lower ends of the web 112. Preferably, the width of the top flange 114 is wider than the width of the bottom flange 116, and the thickness of the top flange 116 is preferably thicker than the top flange 114. The material of the reinforcement 110 may be formed of steel, aluminum, or various alloys thereof.

The plate 120 is formed of hard steel, mild steel, aluminum, or an alloy thereof, and when used in an aircraft vessel or the like, may be formed of a material having a smaller specific gravity and a weaker strength than the reinforcement 110. For example, the reinforcement 110 may be made of high tensile steel, the plate 120 may be made of mild steel, the reinforcement may be made of aluminum 6082, and the plate 120 may be made of aluminum 5083.

The rigid support 130 is for supporting and fixing the reinforcement 110 in the process of welding the reinforcement 110 to the plate 120 is formed inside the reinforcement receiving portion (130a). The reinforcing member accommodating part 130a may be formed inside the rigid support in a shape corresponding to the cross-sectional shape of the reinforcing member 110, but is limited to the shape as long as the reinforcing member 110 is accommodated therein. It doesn't work. When the reinforcement 110 is inserted or accommodated in the reinforcement receiving portion 130a, the reinforcement 110 is supported and fixed by the inner surface of the reinforcement receiving portion as shown.

Referring to the process of manufacturing the plate-reinforcement assembly 100 using the above-described structural members, etc. are as follows. First, the rigid support 130 is placed in a suitable place on the bottom surface 200 to prepare for the welding operation. Thereafter, the reinforcing member 110 is inserted into the reinforcing member accommodating portion 130a of the rigid support 130 by a method such as insertion to fix the support. At this time, the rigid support 130 is preferably fixed to the bottom surface 200 by a jig or the like not to move. Next, the plate 120 is attached to contact the bottom flange 116 of the reinforcement 110 accommodated in the rigid support 130. In this case, in order to prevent the welding position of the plate member 120 from being twisted before the welding operation, it is preferable to temporarily temporarily join the reinforcement member 110 and the plate member 120 using an adhesive such as glue, and further, the plate member 120. Is more preferably fixed with a jig (not shown) or the like. When the above-mentioned welded step is completed, the friction stir welding machine 140 is used to weld the reinforcement 110 to the plate 120 by welding along a welding line which is a line where the bottom flange 116 of the reinforcement 110 meets the plate 120. It is good to join. Reference numeral 150 in the drawing represents a weld surface.

Figure 6 is a partial perspective view showing a state in which the reinforcement is welded to the plate by the present invention, Figure 7 is a schematic perspective view of the plate-reinforcement assembly produced by the present invention. As shown in the drawing, the process of welding the reinforcement 110 to the plate 120 is performed by the rotary tool 142 of the friction stir welding machine (not shown) and the probe 144 provided on the axis of the rotary tool 142. Is performed. The rotary tool 142 and the probe 144 is formed of a hard material stronger than the base material. When the rotary tool 142 rotates while pressing the plate 120, the rotary tool 142 and the probe 144 rotate by mutual friction between the probe 144 and the plate 120. The peripheral material of the tool 142 and the probe 144 is thermally softened and a metal floor is generated in the material to be joined. In this case, as the rotary tool 142 moves, the tool rear flow part is rapidly cooled by heat conduction to form a junction. According to such friction stir welding, the welding surface as shown in FIG. 6 is formed up to the bottom flange 116 of the reinforcing member 110, thereby forming the plate-reinforcement assembly 100 integrally.

According to the manufacturing method of the plate-reinforcement assembly 100 of the present invention, even when the plate member 120 is made of aluminum or an alloy thereof, since the temperature of the joint does not reach the melting point, the microstructure can be obtained in the reverse flow without casting. This can be achieved plate-reinforcement assembly 100 of excellent mechanical strength. In addition, since the bottom flange 116, which is a thick lower end portion of the reinforcement 110, is joined, no blowholes or cracks are generated by welding. In addition, the amount of deformation of the material after joining is also very small, resulting in very excellent material properties.

1 to 3 are views for explaining a method of manufacturing a conventional plate-stiffener assembly.

Figure 4 is a view for explaining a plate-reinforcement assembly manufacturing method according to an embodiment of the present invention.

5 is a view for explaining a plate-reinforcement assembly manufacturing method according to another embodiment of the present invention.

Figure 6 is a partial perspective view showing a state in which the reinforcement is welded to the plate by the present invention.

7 is a schematic perspective view of a plate-stiffener assembly made in accordance with the present invention.

<Description of the symbols for the main parts of the drawings>

100: plate-reinforcement assembly 110: stiffener

112: web 114: top flange

116: bottom flange 120: plate

130: rigid support 130a: stiffener receiving portion

142: rotary tool 144: probe

Claims (7)

In the method of manufacturing a plate-stiffener assembly by welding the plate and the reinforcement, Preparing a rigid support formed with a reinforcing member accommodating part as a space capable of accommodating the reinforcing material therein; Coupling a reinforcing member to the reinforcing member receiving portion of the rigid support; Coupling a plate to one end of the fixed reinforcement; And Friction stir welding of one side end of the reinforcement along the joining surface where the plate contacts Plate-reinforcement assembly manufacturing method characterized in that it comprises a. The method of claim 1, In the step of coupling the plate to one end of the reinforcement, One end of the reinforcing material is a plate-reinforcement assembly manufacturing method characterized in that attached to the plate using an adhesive. The method of claim 1, The reinforcement is a plate-reinforcement assembly manufacturing method characterized in that it consists of a central web and the flange portion formed on the upper and lower ends of the web. The method of claim 1, And the reinforcing member accommodating portion formed in the rigid support is formed to have a shape corresponding to the cross-sectional shape of the reinforcing material. The method of claim 1, The reinforcement and the plate is a plate-reinforcement assembly manufacturing method, characterized in that each formed of a different type of metal having different material properties. The method of claim 5, The reinforcing material is a plate-stiffener assembly manufacturing method characterized in that formed by extrusion. Plate-reinforcement assembly formed by any one of the manufacturing method selected from claim 1 to claim 6.
KR1020070129734A 2007-12-13 2007-12-13 Manufacturing method of plate-stiffener assembly and a plate-stiffener assembly formed using the same KR20090062465A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101524282B1 (en) * 2013-08-30 2015-06-10 조선대학교산학협력단 Structure with reduced stress and Attachment method to reduce stress due to a reinforcing plate
CN108237323A (en) * 2017-12-22 2018-07-03 江西理工大学 A kind of method and apparatus that can effectively reduce/eliminate agitating friction welded blank residual stress

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101524282B1 (en) * 2013-08-30 2015-06-10 조선대학교산학협력단 Structure with reduced stress and Attachment method to reduce stress due to a reinforcing plate
CN108237323A (en) * 2017-12-22 2018-07-03 江西理工大学 A kind of method and apparatus that can effectively reduce/eliminate agitating friction welded blank residual stress

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