SYSTEM AS A DEVICE FOR ASSEMBLING A CROSSBEAM FOR A BATTERY HOUSING

Abstract

System as a device for assembling a crossbeam (1) for a battery housing, which inserts a core (210) into the crossbeam (1) with a closed section (3) having a substantially square cross-sectional shape and welds a part (5) to be mounted on an outer surface of the crossbeam (1) using a laser, the system comprising: a welding device (110) configured to clamp the cross member (1); a laser welding gun; a core (210) configured to be inserted into the closed section (3) of the crossbeam (1) clamped on the welding device (110), wherein the core (210) contains a first core block (10) with a first sliding surface (11) formed on one side of the first core block (10) and inclined in the width direction of the first core block (10) from one side to the other of the first core block (10), so that the first core block (10) has different width-directed thicknesses on the top and bottom sides, a second core block (20) with a second sliding surface (21) formed on one side of the second core block (20) and shaped in such a way that it is inclined in the lateral direction of the second core block (20) from one side to the other of the second core block (20), so that the second core block (20) has different thicknesses in the lateral direction on the top and bottom sides in order to slide on the corresponding first sliding surface (11) of the first core block (10) in an upper and lower direction, a plurality of first magnetic elements (30) attached to a surface of the first core block (10), and a plurality of second magnetic elements (40) installed on a surface of the second core block (20) opposite one surface of the first core block (10); a core feeding device (310) configured to introduce the core (210) into the closed section (3) of the crossbeam (1); a mounting frame (113) which is installed in a first device frame (111); a plurality of first clamps (115) installed in the mounting frame (113) to clamp the part (5) to be mounted, which is temporarily attached to both sides of the crossbeam (1); at least a second clamp (117) installed in the mounting frame (113) to clamp an upper part of the crossbeam (1); and a core guide unit (121) which supports each of the two end sections of the core (210) in a longitudinal direction and which is inserted into the closed section (3) of the crossbeam (1) and installed in the mounting frame (113) to push the core (210) in a downward direction.

Description

BACKGROUND OF THE INVENTION(a) Field of the invention

[0001] The present invention relates to a system for mounting a cross member for a battery housing and in particular to a system for mounting a cross member for a battery housing that assembles a cross member mounted on a battery housing. (b) Description of the state of the art

[0002] Recently, the development of electric vehicles has been steadily accelerated due to pollution problems and efforts to develop alternative energy sources.

[0003] The electric vehicle is equipped with an electric motor (drive motor) for propelling the vehicle and a high-voltage battery pack that supplies the electric motor with power. The high-voltage battery pack is an energy source that drives the electric motor and supplies it with high voltage via an inverter.

[0004] The battery pack is generally mounted on a lower part of a vehicle body. The battery pack comprises a battery housing with an interior, a variety of battery modules installed inside the battery housing, and a cover for the battery housing.

[0005] Here, a multitude of crossbeams are attached to a base surface of the battery housing, configured to subdivide a mounting area for the multiple battery modules. For example, each of the multiple crossbeams can be designed as a closed cross-section with a square cross-sectional shape. The components to be mounted, such as a housing bracket, a battery module mounting bracket, and a reinforcement bracket, are each attached to the multiple crossbeams. The components to be mounted can each be bonded to the multiple crossbeams.

[0006] According to the state of the art, the parts to be assembled can be joined to an outer surface of the crossbeam by means of a laser beam emitted by a laser welding gun of a welding robot while they are clamped together in a welding device.

[0007] However, since, according to the state of the art, each of the several crossbeams is designed as a closed cross-section with a square cross-sectional shape, the crossbeam can be thermally deformed by the laser beam if the parts to be assembled are laser-welded on the outer surface.

[0008] Thermal deformation causes a gap between the crossbeam and the part to be mounted, and as a result, thermal deformation can lead to a reduction in the laser welding quality of the part to be mounted to the crossbeam.

[0009] CN 1 02 434 986 A describes a core for a solar thermal collector made of a composite material with multi-material rivet welding, as well as a shape and a method for its manufacture.

[0010] CN 1 09 332 991 A describes a welding prepositioning expansion tool and a method for welding small assemblies using the same.

[0011] DE 10 2016 101 174 A1 describes a fastening device for insertion into a recess, comprising a base with at least one connecting section and at least one retaining element movable relative to the connecting section, wherein in an insertion position of the retaining element the total cross-section of connecting section and retaining element is equal to or less than the diameter of the recess and when a force directed against the insertion direction is applied the total cross-section of connecting section and retaining element is increased by a relative movement between retaining element and connecting section such that the fastening device rests forcefully against a wall of the recess in a holding position of the retaining element.

[0012] In DE 10 2014 100 114 A1, an adjustment device for positioning an adjustable assembly by means of a guide device is described.

[0013] DE 32 12 677 A1 describes a clamping element consisting of two bodies movable relative to each other, at least one of which has at least two diverging side surfaces and a second body rests against one of the diverging surfaces and is displaceable relative to it. The bodies are surrounded by a shrinkable shell that shrinks when heated, thereby causing a relative displacement of the two bodies, which leads to a change in the external dimensions of the clamping element. The clamping elements are particularly suitable for clamping and supporting the windings of transformers.

[0014] The information disclosed in this "Background" section is provided solely for a better understanding of the background of the invention and may therefore contain information that is not part of the prior art and is already known to a person skilled in the art in this country. SUMMARY OF THE INVENTION

[0015] Exemplary embodiments of the present invention have been made to provide a system for assembling a cross member for a battery housing which can minimize the thermal deformation of a cross member by a laser beam when parts to be assembled with the cross member are joined to the cross member by laser welding.

[0016] The invention relates to a system as a device for assembling a crossbeam for a battery housing with the features of claim 1. Further developments of the invention are specified in the dependent claims.

[0017] One embodiment of the present invention provides a system as a device for mounting a cross member for a battery housing, which inserts a core into the cross member with a closed section having a substantially square cross-sectional shape and laser-welds a part to be mounted to an outer surface of the cross member. The system as a device for mounting a cross member for a battery housing comprises: a welding device configured to clamp the crossbeam; a laser welding gun; a core configured to be inserted into the closed section of the crossbeam clamped on the welding device; and a core feeding device configured to insert the core into the closed section of the crossbeam, the core comprising: a first core block having a first sliding surface formed on one side of the first core block and inclined in the width direction of the first core block from one side to the other of the first core block, such that the first core block has different width-directed thicknesses on the top and bottom;a second core block having a second sliding surface formed on one side of the second core block and shaped to be inclined in the lateral direction of the second core block from one side to the other, so that the second core block has different lateral thicknesses on its top and bottom sides to slide on the corresponding first sliding surface of the first core block in an upper and lower direction; a plurality of first magnetic elements installed on one surface of the first core block; and a plurality of second magnetic elements installed on one surface of the second core block opposite one surface of the first core block; a mounting frame installed in a first fixture frame; a plurality of first clamps installed in the mounting frame to clamp the part to be mounted, which is provisionally connected to the crossbeam on both sides; at least one second clamp installed in the mounting frame to clamp an upper section of the crossbeam; and a core guide unit supporting each of the two end sections of the core in a longitudinal direction, inserted into the closed section of the crossbeam and installed in the mounting frame to push the core in a downward direction.

[0018] The first core block can contain a sliding element that is connected to one surface and has the first sliding surface.

[0019] A coupling groove can be formed on one surface of the second core block, with which the sliding element is coupled.

[0020] Furthermore, the second sliding surface can be formed at the coupling groove.

[0021] A first pressure surface, which presses on a surface of the closed section of the crossbeam, can be formed on the other surface of the first core block.

[0022] A second pressure surface can be formed on the other surface of the second core block, which presses against the other surface of the closed section of the crossbeam.

[0023] Each of the multiple first magnetic elements can be attached to one surface of the first core block and secured by a first magnetic bolt.

[0024] Each of the multiple second magnetic elements can have a different polarity than each of the multiple first magnetic elements and can be attached to one surface of the second core block and secured by a second magnetic bolt.

[0025] The first core block and the second core block can be moved away from each other or close to each other as they slide in an upper and lower direction through sliding surfaces that correspond to each other and are shaped to be inclined.

[0026] Furthermore, the first core block can be arranged above a top surface of the second core block, and the core feeding device can insert the core, to which the first core block and the second core block are coupled by the multiple magnetic elements, into the closed section of the crossbeam.

[0027] The welding device can push the first core block downwards, so that the first core block and the second core block slide away from each other in the upper and lower directions through the inclined sliding surfaces, while the core is inserted into the closed section of the crossbeam.

[0028] The mounting frame can be connected to a motor that is installed in the first fixture frame and is rotatably installed in the first fixture frame by the operation of the motor.

[0029] Each core guide unit can include a guide cylinder installed in the mounting frame in an upper and lower direction, a core guide block connected to the top of an actuating rod of the guide cylinder so that the core passes through it, at least one core guide roller rotatably installed in the core guide block in one direction of movement of the core, and a core pressure unit provided on an upper section of the core guide block that presses the core in the lower direction.

[0030] In one example, the core pressing unit can include a press roller that is rotatably attached to the upper part of the core guide block and connected to the core guide block via a spring.

[0031] In another example, the core pressing unit can include a press plate that is attached to the upper part of the core guide block.

[0032] The system for mounting a crossbeam may also include a third clamp installed in the mounting frame to clamp the core pressed by each core guide unit.

[0033] The system for mounting a crossbeam may also include a stopper that is built into the mounting frame to be movable in the upper and lower directions so that the core inserted into the closed section of the crossbeam is correctly positioned.

[0034] The system for assembling a crossbeam may further include a core feeding device installed in a second device frame, which introduces the core into the closed section of the crossbeam.

[0035] The core feeding device can include a core guide element installed in the second device frame to guide the core in the longitudinal direction, a movement element installed in the second device frame to move back and forth in the longitudinal direction of the core guide element, and a core clamp installed in the movement element to clamp the core placed on the core guide element.

[0036] The core feeding device may also include at least one core alignment element, which is installed in the second device frame and aligns the core placed on the core guide element.

[0037] The at least one core alignment element can include a core alignment cylinder installed in the second device frame, and a core alignment rod attached to an end section of an actuating rod of the core alignment cylinder and penetrating a position alignment hole formed in the core.

[0038] According to the present invention, the thermal deformation of the crossbeam by a laser beam through a core can be minimized when a component to be mounted is connected to the crossbeam by laser welding. Therefore, a gap between the crossbeam and the component to be mounted can be prevented, and the quality of the laser welding of the component to the crossbeam can be further improved.

[0039] Furthermore, an effect that can be achieved or predicted by the exemplary embodiment of the present invention is disclosed directly or implicitly in the detailed description of the exemplary embodiment of the present invention. That is to say, various effects that are predicted according to the exemplary embodiment of the present invention will be described in the detailed description below. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] These drawings serve to describe an exemplary embodiment of the present invention, and therefore the technical spirit of the present invention should not be interpreted as being limited to the accompanying drawings. Fig. Figure 1 is a perspective view showing a system for assembling a crossbeam for a battery housing according to an exemplary embodiment of the present invention. Fig. Figure 2 is a view illustrating an example of the cross member used for the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention. Fig. Figure 3 is a perspective coupling view showing a core applied to the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention. Fig. Figure 4 is a perspective partial exploded view showing the core applied to the system for assembling a crossbeam for a battery housing according to the exemplary embodiment of the present invention. Fig. Figure 5 is a coupling cross-sectional view illustrating the core applied to the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention. Fig. Figure 6 is a perspective view showing a welding device used for the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention. Fig. Figure 7 is a view showing a first clamping device of the welding device used for the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention. Fig. Figure 8 is a view showing a second clamping device of the welding device used for the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention. Fig. Figure 9 is a view showing a stopper of the welding device applied to the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention. Fig. Figure 10 is a view illustrating a core guide unit of the welding device applied to the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention. Fig. Figure 11 is a view showing a third clamp of the welding device used for the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention. Fig. Figure 12 is a perspective view showing a core feeding device used for the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention. Fig. Figure 13 is a view showing a core clamp of the core feeding device applied to the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention. Fig. Figure 14 is a view showing a core alignment element of the core feeding device applied to the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention.

[0041] It should be understood that the referenced drawings are not particularly to scale, but rather represent a brief expression of various preferred features that illustrate a basic principle of the present invention. For example, specific design features of the present invention, including a specific dimension, direction, position, and shape, are partly determined according to a specific intended application and operating environment. DETAILED DESCRIPTION OF THE EXECUTION FORMS

[0042] The present invention is described in more detail below with reference to the accompanying drawings, which illustrate exemplary embodiments of the invention. As those skilled in the art will recognize, the described embodiments can be modified in various ways without affecting the spirit or scope of the present invention.

[0043] The terms used herein serve only to describe certain exemplary embodiments and are not intended to limit the present disclosure. The singular forms used herein also include plural forms unless expressly stated in a specific context.

[0044] It should also be understood that the terms "contain" and / or "containing" as used here indicate the presence of the specified features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, components, and / or groups thereof. The term "and / or" as used here includes one or all random combinations of one or more elements that are linked and listed.

[0045] The term "coupled" here refers to a physical relationship between two components that are directly connected by welding, self-piercing riveting (SPR), flow drilling screws (FDS), structural adhesives, etc., or indirectly by one or more parameters.

[0046] The terms “vehicle”, “means of transport”, “car” or similar terms used herein generally include passenger cars, including passenger cars, sport utility vehicles (SUVs), buses, trucks and various commercial vehicles, as well as hybrid vehicles, electric vehicles, hybrid electric vehicles, special-purpose vehicles based on electric vehicles (PBVs), hydrogen-powered vehicles and other vehicles using alternative fuels (e.g. fuel derived from resources other than petroleum).

[0047] Exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0048] Fig. Figure 1 is a perspective view showing a system for assembling a crossbeam for a battery housing according to an exemplary embodiment of the present invention.

[0049] Referring to Fig. 1 The system 100 for mounting a cross member for a battery housing according to the exemplary embodiment of the present invention can be applied to a method for mounting a battery housing (not shown) of a battery pack (not shown) that is mounted in an electric vehicle.

[0050] Furthermore, the system 100 for mounting a cross member for a battery housing according to the exemplary embodiment of the present invention can be applied to a method for mounting a plurality of cross members 1 attached to the battery housing (not shown).

[0051] The multiple crossbeams 1 are configured to support and secure multiple battery modules (not shown) housed within the battery casing. In one example, each of the multiple crossbeams 1 comprises a closed section 3 with a substantially square cross-sectional shape, as shown in Fig. 2 shown.

[0052] Here, at least one part 5 to be mounted, which includes a holder for the battery module and a reinforcement holder, can be mounted (e.g. glued or welded) to each of the several crossbeams 1.

[0053] Furthermore, the system 100 for mounting a cross member for a battery housing according to the exemplary embodiment of the present invention can be applied to a welding assembly process in which at least one part 5 to be mounted is welded to each of the several cross members 1 by irradiating a connecting section of each of the several cross members 1 and at least one part 5 to be mounted with a laser beam.

[0054] In one example, the at least one part 5 to be mounted can be a bracket with a "U"-shaped cross-section. The at least one part 5 to be mounted can be connected to each of the several crossbeams 1 by laser welding, while it is temporarily connected (e.g., fitted) to a lower section of each of the several crossbeams 1.

[0055] In the exemplary embodiment of the present invention, it is described that the part 5 to be mounted is laser-welded to the cross member 1 mounted on the battery housing. However, if a part to be mounted, such as a bracket, is laser-welded to a base material with a closed cross-section and a defined shape, the technical concept of the present invention can be applied, even though this is not expressly limited to such applications.

[0056] Within the scope of the present invention, an example of the assembly of components is described using a front and a back direction.

[0057] Furthermore, within the scope of the present invention, an "upper part", "upper section", "top" or "upper surface" of the component refers to an end section, part, end or surface of the component located relatively above in the illustration, and a "lower part", "lower section", "bottom" or "bottom surface" of the component refers to an end section, part, end or surface located relatively below in the illustration.

[0058] Furthermore, in the present invention, the end (e.g., one end or the other end) of the component represents the end of the component in a predetermined direction, and the end section (e.g., one end section or the other end section) of the component represents a predetermined section of the component that contains the end.

[0059] The system 100 for assembling a crossbeam for a battery housing according to the exemplary embodiment of the present invention is designed in a structure in which, when at least one part 5 to be mounted is connected to each of the several crossbeams 1 by laser welding, the thermal deformation of the crossbeams 1 by the laser beam can be minimized.

[0060] For this purpose, the system 100 for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention comprises a welding device 110, a core 210 and a core feeding device 310.

[0061] In the exemplary embodiment of the present invention, the welding device 110 welds the part 5 to be mounted together with at least one surface (e.g. both surfaces) of the crossbeam 1 by laser welding.

[0062] Furthermore, the welding device 110 clamps the crossbeam 1. One configuration of the welding device 110 is described in more detail below.

[0063] In the exemplary embodiment, the core 210 can be inserted into the closed section 3 of the crossbeam 1 in the longitudinal direction of the crossbeam 1 clamped on the welding device 110.

[0064] Fig. Figure 3 is a perspective coupling view illustrating a core attached to the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention. Fig. Figure 4 is a perspective partial exploded view illustrating the core used in the system for assembling a crossbeam for a battery housing according to the exemplary embodiment of the present invention, and Fig. Figure 5 is a coupling cross-sectional view illustrating the core used in the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention.

[0065] With reference to the Fig. 1, Fig. 2, Fig. 3, Fig. 4 to Fig. 5 the core 210 according to the exemplary embodiment of the present invention essentially comprises a first core block 10, a second core block 20, a plurality of first magnetic elements 30 and a plurality of second magnetic elements 40.

[0066] The first core block 10 is made of a steel material. The first core block 10 contains a sliding surface 11 which is shaped such that it is inclined on one side in the width direction to the other side.

[0067] On the other surface of the first core block 10, a first pressure surface 13 is formed, which presses a surface of an inside (e.g. the closed section 3) of each of the several crossbeams 1.

[0068] Furthermore, the first core block 10 includes a sliding element 15 connected to one surface. The sliding element 15 is formed on the aforementioned first sliding surface 11 in an upper and lower direction.

[0069] In this case, the sliding piece 15 is attached to a surface of the first core block 10 by a plurality of bolts B.

[0070] The second core block 20 is made of steel. The second core block 20 contains a second sliding surface 21, which is designed to be inclined on one side in the width direction in order to slide on the first sliding surface 11 of the corresponding first core block 10 in the upper and lower directions.

[0071] On the other surface of the second core block 20, a second pressure surface 23 is formed, which presses the other surface of the inside (e.g. the closed section 3) of each of the several crossbeams 1.

[0072] A coupling groove 25 is formed on a surface of the second core block 20, to which a sliding element 15 can be coupled in order to slide on the first sliding surface 11 of the first core block 10 in the upper and lower direction.

[0073] In this process, a second sliding surface 21 is formed on the coupling groove 25, which can slide on the first sliding surface 11 of the sliding piece 15 in the upper and lower direction.

[0074] The multiple first magnetic elements 30 and the multiple second magnetic elements 40 couple surfaces of the first core block 10 and the second core block that are facing each other.

[0075] Each of the multiple first magnetic elements 30 is attached to a surface of the first core block 10. Each of the multiple first magnetic elements 30 can be attached to a surface of the first core block 10 and fastened to a surface of the first core block 10 by a first magnetic bolt 31.

[0076] Furthermore, each of the multiple second magnet elements 40 is attached to a surface of the second core block 20 that faces a surface of the first core block 10. Each of the multiple second magnet elements 40 can have a different polarity than each of the multiple first magnet elements 30. Each of the multiple second magnet elements 40 can be attached to a surface of the second core block 20 and secured to a surface of the second core block 20 by a second magnetic bolt 41.

[0077] Here, each of the several first magnetic elements 30 installed on a surface of the first core block 10 and each of the several second magnetic elements 40 installed on a surface of the second core block 20 can be arranged such that they are spaced apart from each other in the upper and lower directions.

[0078] Furthermore, the first core block 10 and the second core block 20 can be moved away from each other or towards each other while sliding in the upper and lower directions through the first sliding surface 11 and the second sliding surface 21, which face each other and touch each other.

[0079] Fig. Figure 6 is a perspective view showing a welding device used for the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention.

[0080] The welding device 110 according to the exemplary embodiment of the present invention comprises a first device frame 111, a mounting frame 113, several first clamps 115, at least one second clamp 117, a stopper 119, a core guide unit 121 and a third clamp 123 (see Fig. 6).

[0081] The first fixture frame 111 is installed on the floor of a process workstation. The first fixture frame 111 is configured to accommodate various components, which are described below. The first fixture frame 111 can consist of a single frame or two or more subdivided frames.

[0082] The first fixture frame 111 can contain various accessory elements, such as a bracket, a rod, a bar, a plate, a housing, a box, a block, a partition and a rib, configured to support the respective components.

[0083] However, since the various accessory elements are configured to attach the respective components described below to the first device frame 111, the various accessory elements are collectively referred to as the first device frame 111 in the exemplary embodiment of the present invention, with one exception.

[0084] The mounting frame 113 is installed in the first fixture frame 111. Furthermore, the mounting frame 113 can be rotatably installed in the first fixture frame 111 to enable smooth laser welding.

[0085] Therefore, the mounting frame 113 is connected to a motor 125, which is installed in the first fixture frame 111. The mounting frame 113 can be rotated by the drive of the motor 125.

[0086] The majority of the first clamps 115 clamp the part 5 to be mounted, to which the crossbeam 1 is provisionally coupled, on both sides of the crossbeam 1. The majority of the first clamps 115 are installed in the mounting frame 113.

[0087] Here, each of the several first terminals 115 is connected to the first clamping cylinder 127, as in Fig. Figure 7 shows that each of the several first clamps 115 can move forward or backward by actuating the first clamping cylinder 127 and clamp the part 5 to be mounted on both sides of the crossbeam 1.

[0088] The at least one second clamp 117 is configured to clamp the upper part of the crossbeam 1 on both sides of the crossbeam 1. The at least one second clamp 117 is attached to the mounting frame 113.

[0089] The at least one second terminal 117 is, as in Fig. Figure 8 shows the second clamping cylinder 129 functionally connected to it. The at least one second clamp 117 can move forwards or backwards by actuating the second clamping cylinder 129 and clamp the upper part of the crossbeam 1.

[0090] The stopper 119 correctly secures the core 210 inserted into the closed section 3 of the crossbeam 1. The stopper 119 is movably mounted in the mounting frame 113, allowing it to move upwards and downwards.

[0091] Here, the stopper 119 is connected to a stopper cylinder 131, which is installed in the mounting frame 113 in the upper and lower directions. The stopper 119 can be moved in the upper and lower directions by actuating the stopper cylinder 131 and can stop the end section inserted into the closed section 3 of the crossbeam 1.

[0092] The core guidance unit 121 supports each of the two end sections of the core 210 inserted into the closed section 3 of the crossbeam 1 and pushes the core 210 in a downward direction.

[0093] Here, the core 210 inserted into the closed section 3 of the crossbeam 1 is in a state in which the first core block 10 is located above the top of the second core block 20 and the first core block 10 and the second core block 20 are coupled by the plurality of first magnetic elements 30 and the plurality of second magnetic elements 40, as shown in the Fig. 3, Fig. 4 to Fig. Figure 5 shows that the first sliding surface 11 of the first core block 10 is located on an upper section of the second sliding surface 21 of the second core block 20.

[0094] The core guide units 121 are installed in the mounting frame in such a way that they correspond to the two end sections, which are each attached in the longitudinal direction of the cross member 1 to the several first clamping brackets 115 and at least one second clamping bracket 117.

[0095] Each core guide unit 121 comprises a guide cylinder 133, a core guide block 135, at least one core guide roller 137 and a core press unit 139, as shown in Fig. 10 shown.

[0096] The guide cylinders 133 are installed in the mounting frame 113 in the upper and lower directions such that they correspond to the two end sections of the core 210 inserted into the closed section 3 of the crossbeam 1.

[0097] The core guide block 135 is functionally connected to the upper end of an actuating rod of the guide cylinder 133, so that the core 210 passes through.

[0098] The at least one core guide block 137 is rotatably installed in the core guide block 135 in one direction of movement of the core 210 in order to support both end sections of the core 210.

[0099] Furthermore, the core pressing unit 139 pushes the core 210 downwards through the core guide block 135 by moving the guide cylinder 133 backwards. The core pressing unit 139 is located on an upper part of the core guide block 135.

[0100] The core press unit 139 can be rotatably mounted on the upper part of the core guide block 135 and, in one example, may include a press roller 143 connected to the core guide block 135 via a spring 141. In the other example, the core press unit 139 may include a press plate 145 attached to the upper part of the core guide block 135.

[0101] When the core 210, which is inserted into the closed section 3 of the crossbeam 1, is pressed downwards by the core pressing unit 139 through the reverse operation of the guide cylinder 13, the first core block 10 and the second core block 120 can be moved away from each other as they slide in the upper and lower directions through the first sliding surface 11 and the second sliding surface 21.

[0102] Furthermore, the third terminal 123 is configured to clamp the core 210 pressed by the core pressing unit 139 of each core guide unit 121. The third terminal 123 is installed in the mounting frame 113.

[0103] The third terminal 123 is connected to a third clamping cylinder 147, which is installed in the mounting frame 113, as shown in Fig. 11 shown.

[0104] The third terminal 123 can be moved by actuating the third clamping cylinder 147 and can clamp the end section of the core 210.

[0105] Fig. Figure 12 is a perspective view showing a core feeding device used for the system for assembling a cross member for a battery housing according to the exemplary embodiment of the present invention.

[0106] The core feeding device 310 according to the embodiment of the present invention places the core 210 into the closed section 3 of the cross member 1, which is clamped by the welding device 110 (see Fig. 6 and Fig. 12).

[0107] Here, as in the Fig. 3, Fig. 4 to Fig. As shown in Figure 5, the first core block 10 is arranged above the second core block 20, and the core feeding device 310 can insert the core 210, to which the first core block 10 and the second core block 20 are coupled, into the closed section 3 of the crossbeam 1 through the plurality of first magnetic elements 30 and the plurality of second magnetic elements 40.

[0108] The core feeding device 310 comprises a second device frame 311, a core guide element 313, a motion element 315, a core clamp 317 and at least one core alignment element 319.

[0109] The second fixture frame 311 is installed on the floor of the work area and positioned near the first fixture frame 111 of the welding fixture 110. The second fixture frame 311 is configured to accommodate various components, which are described below. The second fixture frame 311 can consist of a single frame or of two or more subdivided frames.

[0110] The second fixture frame 311 can contain various accessory elements such as the bracket, rod, bar, plate, housing, enclosure, block, partition and rib, configured to support the respective components.

[0111] However, since the various accessory elements are configured to attach the respective components described below to the second device frame 311, the various accessory elements are collectively referred to as the second device frame 311 in the exemplary embodiment of the present invention, with one exception.

[0112] The core guide element 313 is installed in the second fixture frame 311 to guide the core 210 longitudinally. The core guide element 313 is arranged on the same line as the closed section 3 of the crossbeam 1 clamped to the welding fixture 110.

[0113] The motion element 315 is installed in the second fixture frame 311 to move back and forth in the longitudinal direction of the core guide element 313. The motion element 315 can move back and forth in the longitudinal direction of the core guide element 313 by means of a drive device (e.g., a servo motor, a leadscrew, or a ball screw and a guide rail structure) known to those skilled in the art. The motion element 315 can be slidably coupled to a rail 312, which is arranged in the second fixture frame 311 in the longitudinal direction of the core guide element 313.

[0114] The core clamp 317 clamps the end section of the core 210, which is inserted into the core guide element 313. The core clamp 317 is installed in the motion element 315. The core clamp 317 is connected to a gripper cylinder 323, which is installed in the motion element 315, as shown in Fig. Figure 13 shows that the core clamp 317 can clamp (e.g., grip) the end section of the core 210 by actuating the gripper cylinder 323.

[0115] Furthermore, the at least one core alignment element 319 aligns (e.g., correctly positions) the core 210 placed in the core guide element 313. The at least one core alignment element 319 is installed in the second fixture frame 311. The at least one core alignment element 319 comprises a core alignment cylinder 325 and a core alignment rod 327, as shown in Fig. 14 shown.

[0116] The core alignment cylinder 325 is installed in the second device frame 311. The core alignment rod 327 is attached to the end section of an actuating rod 326 of the core alignment cylinder 325. The core alignment rod 327 can penetrate a position alignment hole 211 formed in the core 210. The position alignment hole 211 in the core 210 can be designed as an elongated hole in the upper and lower directions.

[0117] The following refers to the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12, Fig. 13 to Fig. 14 a process of system 100 for assembling the cross member for the battery housing according to the exemplary embodiment of the present invention, configured as such, is described in detail.

[0118] In the exemplary embodiment of the present invention, the crossbeam 1 is first inserted into the mounting frame 113 of the welding device 110 and the part 5 to be mounted, to which the crossbeam 1 is provisionally coupled, is clamped by several first clamps 115 on both sides of the crossbeam 1.

[0119] Subsequently, in the exemplary embodiment of the present invention, the upper part of the crossbeam 1 is clamped by at least a second clamp 117 on both sides of the crossbeam 1.

[0120] Here, the core guide block 135 of the core guide unit 121 is in a state in which it moves in the upper direction together with the core press unit 139 by actuating the guide cylinder 133.

[0121] Furthermore, the core alignment rod 327 of at least one core alignment element 319 is in a state in which it moves backward due to the reverse operation of the core alignment cylinder 325. In addition, the movement element 315 is in a state in which it moves backward together with the core clamp 317 by the drive of a drive device (not shown).

[0122] In the exemplary embodiment of the present invention, the core 210 is then placed on the core guide element 313 of the core feeding device 310, and the core alignment rod 327 is moved forward by a forward movement of the core alignment cylinder 325. This causes the core alignment rod 327 to correctly position the core 210 on the core guide element 313 as it is fitted into the alignment hole 211 of the core 210.

[0123] In this case, the core 210 is in a state in which the first core block 10 is located above the top of the second core block 20, and the first core block 10 and the second core block 20 are connected to each other by the multiple first magnetic elements 30 and the multiple second magnetic elements 40.

[0124] In the exemplary embodiment of the present invention, the end section of the core 210 is clamped by the core clamp 317, and the core alignment rod 327 is moved backward by the reverse operation of the core alignment cylinder 325. Therefore, the core alignment rod 327 is pulled out of the position alignment hole 211 of the core 210. In this case, the stopper 119 is in a state of upward movement due to actuation of the stopper cylinder 131.

[0125] In the exemplary embodiment of the present invention, the moving element 315 is then moved forward by the drive of the drive device (not shown). Subsequently, the core 210 is transported by the moving element 315 along the core guide element 313 and inserted into the closed section 3 of the cross member 1 of the welding device 110, where it is clamped against the core clamp 317.

[0126] Here, both end sections of the core 210 penetrate the core guidance block 135 of the core guidance unit 121 and are located within the core guidance block 135 while moving through at least one core guidance roller 137. In this case, the end section of the core 210 no longer moves forward while it is stopped by the stopper 119.

[0127] Then, in the exemplary embodiment of the present invention, the clamping of the end section of the core 210 is released by unclamping the core clamp 317, and the core guide block 135 is moved in the downward direction by the backward movement of the guide cylinder 133.

[0128] As a result, the core pressing unit 139 of the core guide unit 121 pushes the core 210 in the lower direction through the core guide block 135. Then the cores 210 are moved away from each other in the closed section 3 of the crossbeam 1, while sliding in the upper and lower directions through the first sliding surface 11 and the second sliding surface 21 of the first core block 10 and the second core block 20.

[0129] When the first core block 10 and the second core block 20 are moved away from each other as described above, the first pressure surface 13 of the first core block 10 presses on a surface in the closed section 3 of the crossbeam 1 and the second pressure surface 23 of the second core block 20 presses on the other surface in the closed section 3 of the crossbeam 1.

[0130] In the exemplary embodiment of the present invention, the core 210 pressed by the core pressing unit 139 is then clamped by the third clamp 123.

[0131] In such a state, in the exemplary embodiment of the present invention, when the laser beam is directed by the laser welding gun (not shown) of the welding robot (not shown) onto the bonding area of ​​the part 5 to be mounted, the part 5 to be mounted can be laser welded to both surfaces of the cross member 1.

[0132] While the mounting frame 113 is rotated by the drive of the motor 125, so that the laser welding gun does not collide with parts of the welding device 110, the laser beam is radiated through the laser welding gun and the part 5 to be mounted can be laser welded to both surfaces of the cross member 1.

[0133] In the system 100 for assembling the cross member for the battery housing according to the exemplary embodiment of the present invention described above, the core 210 can be automatically inserted into the closed section 3 of the cross member 1 and both surfaces within the closed section 3 of the cross member 1 can be pressed through the core 210.

[0134] Accordingly, in the exemplary embodiment of the present invention, when the part 5 to be mounted is connected to the crossbeams 1 by laser welding, the thermal deformation of the crossbeam 1 by the laser beam through the core 210 can be minimized.

[0135] In the exemplary embodiment of the present invention, this prevents a gap from forming between the crossbeam 1 and the part 5 to be mounted, and further improves the laser welding quality of the part 5 to be mounted with the crossbeam 1.

[0136] Although the preferred embodiments, examples and embodiments of the present invention are described by the above description, the present invention is not limited thereto, and various modifications may be made within the claims and the scope of the detailed description and the accompanying drawings of the invention, and this naturally also falls within the scope of the present invention. <Beschreibung der Symbole> 1 crossbeam 7. Part to be assembled B bolts 11 First sliding surface 15 sliding piece 21 Second sliding surface 25 Coupling groove 31 First magnetic bolt 41 Second magnetic bolt 100 crossbeam mounting system 110 welding template 113 Mounting frames 117 Second terminal 121 Core Control Unit 125 engine 129 Second clamping cylinder 133 guide cylinders 135 Core guide block 139 Core pressing unit 143 Press roller 147 Third clamping cylinder 211 Position alignment hole 3 Closed section 5. Part to be assembled 10 First core block 13 First printing area 20 Second core block 23 Second printing area 30 First magnetic element 40 Second magnetic element 111 First device frame 115 First terminal 119 stoppers 123 Third terminal 127 First clamping cylinder 131 stopper cylinders 134, 326 Actuating rod 137 Core leadership role 141 spring 145 Pressboard 210 core 310 Core feeding device 311 Second device frame 315 Movement element 319 Core alignment element 323 Gripper cylinders 327 Core alignment rod 313 Core guide element 317 Core clamp 321 rail 325 Core alignment cylinder

Claims

[1] System as a device for assembling a cross member (1) for a battery housing, which inserts a core (210) into the cross member (1) with a closed section (3) having a substantially square cross-sectional shape and welds a part (5) to be mounted on an outer surface of the cross member (1) using a laser, the system comprising: a welding device (110) configured to clamp the cross member (1); a laser welding gun; a core (210) configured to be inserted into the closed section (3) of the crossbeam (1) clamped on the welding device (110), wherein the core (210) contains a first core block (10) with a first sliding surface (11) formed on one side of the first core block (10) and inclined in the width direction of the first core block (10) from one side to the other of the first core block (10), so that the first core block (10) has different width-directed thicknesses on the top and bottom sides, a second core block (20) with a second sliding surface (21) formed on one side of the second core block (20) and shaped in such a way that it is inclined in the width direction of the second core block (20) from one side to the other of the second core block (20), so that the second core block (20) has different width-directed thicknesses on the top and bottom sides in order to slide on the corresponding first sliding surface (11) of the first core block (10) in an upper and lower direction, a plurality of first magnetic elements (30) attached to a surface of the first core block (10), and a plurality of second magnetic elements (40) installed on a surface of the second core block (20) opposite one surface of the first core block (10); a core feeding device (310) configured to introduce the core (210) into the closed section (3) of the crossbeam (1); a mounting frame (113) which is installed in a first device frame (111); a plurality of first clamps (115) installed in the mounting frame (113) to clamp the part (5) to be mounted, which is temporarily attached to both sides of the crossbeam (1); at least a second clamp (117) installed in the mounting frame (113) to clamp an upper part of the crossbeam (1); and a core guide unit (121) which supports each of the two end sections of the core (210) in a longitudinal direction and which is inserted into the closed section (3) of the crossbeam (1) and installed in the mounting frame (113) to push the core (210) in a downward direction. [2] System according to claim 1, wherein: the first core block (10) contains a sliding element (15) which is connected to one surface of the first core block (10) and has the first sliding surface (11). [3] System according to claim 2, wherein: a coupling groove (25) with which the sliding element (15) is coupled is formed on one surface of the second core block (20), and the second sliding surface (21) is formed on the coupling groove (25). [4] System according to claim 1, wherein: a first pressure surface (13) formed on the surface of the first core block (10) opposite the first sliding surface (11) and pressing on a surface of the closed section (3) of the crossbeam (1), and a second pressure surface (23) which is formed on the surface of the second core block (20) opposite the second sliding surface (21) and which presses on the other surface of the closed section (3) of the crossbeam (1). [5] System according to claim 1, wherein: each of the several first magnetic elements (30) is attached to one surface of the first core block (10) and fastened by a first magnetic bolt (31), and Each of the several second magnetic elements (40) has a different polarity than each of the several first magnetic elements (30) and is attached to one surface of the second core block (20) and is fastened by a second magnetic bolt (41). [6] System according to claim 1, wherein: the first core block (10) and the second core block (20) are moved away from each other or close to each other while sliding in an upper and lower direction through sliding surfaces (11, 21) that correspond to each other and are shaped to be inclined. [7] System according to claim 6, wherein: the first core block (10) is arranged above a top surface of the second core block (20) and the core feeder (310) introduces the core (210), to which the first core block (10) and the second core block (20) are coupled by the several magnetic elements (30, 40), into the closed section (3) of the crossbeam (1). [8] System according to claim 7, wherein: the welding device (110) pushes the first core block (10) downwards, so that the first core block (10) and the second core block (20) slide away from each other in the upper and lower directions through the inclined sliding surfaces (11, 21), while the core (210) is inserted into the closed section (3) of the crossbeam (1). [9] System according to claim 1, wherein: the mounting frame (113) is connected to a motor (125) which is installed in the first device frame (111) and is rotatably installed in the first device frame (111) by the operation of the motor (125). [10] System according to claim 1, wherein each core guidance unit (121) comprises: a guide cylinder (133) which is installed in the mounting frame (113) in the upper and lower direction, a core guide block (135) which is connected to a top of an actuating rod (134, 326) of the guide cylinder (133) so that the core (210) passes through it, at least one core guide roller (137) which is rotatably mounted in the core guide block (135) in one direction of movement of the core (210), and a core pressing unit (139) which is provided on an upper section of the core guide block (135) and presses the core (210) in the lower direction. [11] System according to claim 10, wherein: the core press unit (139) comprises a press roller (143) which is rotatably attached to the upper part of the core guide block (135) and is connected to the core guide block (135) via a spring (141). [12] System according to claim 10, wherein: the core press unit (139) contains a press plate (145) which is attached to the upper part of the core guide block (135). [13] System according to claim 1 further comprising: a third clamp (123) which is installed in the mounting frame (113) to clamp the core (210) pressed by each core guide unit (121). [14] System according to claim 1, further comprising: a stopper (119) built into the mounting frame (113) which is movable in the upper and lower direction to correctly position the core (210) inserted into the closed section (3) of the crossbeam (1). [15] System according to claim 1 further comprising: a core feeding device (310) which is installed in a second device frame (311) and introduces the core (210) into the closed section (3) of the crossbeam (1). [16] System according to claim 15, wherein the core feed device (310) comprises: a core guide element (313) which is installed in the second device frame (311) to guide the core (210) in the longitudinal direction, a movement element (315) which is installed in the second device frame (311) to move back and forth in the longitudinal direction of the core guide element (313), and a core clamp (317) which is installed in the motion element (315) and clamps the core (210) placed on the core guide element (313). [17] System according to claim 16, wherein: the core feeding device (310) further includes at least one core alignment element (319) which is installed in the second device frame (311) and aligns the core (210) placed on the core guide element (310). [18] System according to claim 17, wherein the at least one core alignment element (319) contains: a core alignment cylinder (325) which is installed in the second device frame (311), and a core alignment rod (327) which is attached to an end section of an actuating rod of the core alignment cylinder (325) and penetrates into a position alignment hole (211) formed in the core (210).

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