Components manufactured by welding and methods of manufacturing the same

Abstract

The present invention discloses a component manufactured by welding and a manufacturing method thereof, wherein the component manufactured by welding comprises: a first part, provided with a first joint portion; a second part, provided with a second joint portion and a cross joint portion intersecting the second joint portion, and combined with the first part in a manner that a part of the first joint portion overlaps with the second joint portion, and the second joint portion and the first joint portion are first welded; and a third part, provided with a third joint portion, a part of the third joint portion overlaps with another part of the first joint portion, and the rest of the third joint portion overlaps with the cross joint portion, and each overlapping part is post-welded to be combined with the first part and the second part.

Description

Technical Field

[0001] The present invention relates to a component manufactured by welding, in which a plurality of panels are cross-welded to each other by welding such as laser brazing, thereby preventing defects in welding locations that may occur during manufacturing, and a manufacturing method thereof. Background Art

[0002] Generally, when welding steel or aluminum panels or panels of different materials, laser brazing can be used to ensure welding quality and meet design requirements.

[0003] However, in the case of laser brazing, since thin panels are used, it is difficult to ensure the rigidity of the material itself. Moreover, deformation may occur due to external force when clamping for welding, and since welding is performed while the two panels are pressurized against each other, springback may occur after welding. In particular, when cross-welding three or more panels, more than two welding lines cross each other, and since the welds overlap at the intersection, the thermal stress becomes excessive, so deformation occurs at the welding point of the panel, and pinholes are generated when the deformation is severe.

[0004] In order to solve the above problem, it is necessary to prevent the welded parts from overlapping, but in this case, it is difficult to achieve the desired product design. Therefore, a technology that can prevent welding defects while ensuring the desired product design is needed.

[0005] The above background technology description is only used to increase the understanding of the background of the present invention and should not be interpreted as the prior art known to ordinary technicians in this technical field.

[0006] Prior art literature

[0007] (Patent Document 1) KR10-0812414B1 Summary of the invention

[0008] 1. Technical issues to be resolved

[0009] The present invention is proposed to solve the above-mentioned technical problems, and its purpose is to provide a component manufactured by welding and a manufacturing method thereof, which can prevent defects in welding parts that may occur during manufacturing by cross-welding multiple panels to each other through welding such as laser brazing.

[0010] (II) Technical solution

[0011] The component manufactured by welding according to the present invention for achieving the above-mentioned purpose includes: a first part, which is provided with a first joint; a second part, which is provided with a second joint and a cross joint intersecting the second joint, and is combined with the first part in a manner that a part of the first joint overlaps with the second joint, and the second joint and the first joint are first welded; and a third part, which is provided with a third joint, a part of the third joint overlaps with another part of the first joint, and the rest of the third joint overlaps with the cross joint, each overlapping part is post-welded to be combined with the first part and the second part, and a rigid reinforcement part is formed in the first part, the second part or the third part at a position adjacent to where the first welding and the post-welding intersect each other.

[0012] The first welding and the second welding can be laser welding.

[0013] The first joining portion, the second joining portion, the cross joining portion, and the third joining portion may be respectively provided at a first flange, a second flange, and a third flange formed along edges of the first portion, the second portion, and the third portion.

[0014] The first portion, the second portion, and the third portion may be made of the same or different metal materials.

[0015] The second joining portion and the cross joining portion may be provided along the edge division area of ​​the second portion so that the second joining portion and the cross joining portion cross at a position where they intersect each other.

[0016] The rigidity reinforcing portion may be in the shape of a groove recessed to a predetermined depth.

[0017] At a position where the second joint portion of the second part intersects the cross joint portion, a rigidity reinforcement portion is formed at a position between the second joint portion and the cross joint portion.

[0018] The rigidity reinforcing portion may be formed at a position between the second engaging portion and the cross engaging portion, at a position biased toward the second engaging portion.

[0019] The rigid reinforcement portion may be located between the second engagement portion and the cross engagement portion at a position biased toward the second engagement portion, and may be in a groove shape recessed to a predetermined depth so as to be connected to the second engagement portion.

[0020] In the second portion, the second joint portion and the cross joint portion may be spaced apart from each other at positions other than where the second joint portion and the cross joint portion intersect each other, and a plurality of rigid reinforcement portions may be formed at predetermined intervals between the second joint portion and the cross joint portion.

[0021] The recessed position of the rigidity reinforcing portion may be filled with a sealant.

[0022] The sealant may be connected to and filled in pinholes formed at locations where the previous welding and the subsequent welding cross each other.

[0023] The first portion may be an upper panel of an outer panel assembly of a tailgate of a vehicle, the third portion may be a lower panel of the outer panel assembly of the tailgate, and the second portion may be an extension panel disposed between the upper panel and the lower panel of the outer panel assembly of the tailgate.

[0024] The two side ends of the first part and the third part can be welded to each other, and the facing central parts can be separated from each other, the second part can be arranged in the central part, and the first welding and the rear welding can cross each other in a manner of forming an acute angle in the position where the first part, the second part and the third part cross each other.

[0025] The method for manufacturing the above-mentioned components of the present invention includes the following steps: forming a rigid reinforcement portion in the first part, the second part or the third part adjacent to a position where the first welding and the second welding intersect each other; performing the first welding in a state where a part of the first joint part and the second joint part are overlapped and pressurized, thereby combining the first part and the second part; and performing pressurization and performing the second welding in a state where a part of the third joint part and another part of the first joint part are overlapped and the rest of the third joint part and the cross joint part are overlapped, thereby combining the first part, the second part and the third part.

[0026] (III) Beneficial effects

[0027] According to the component manufactured by welding and the manufacturing method thereof of the present invention, a plurality of panels are welded to each other crosswise by welding such as laser brazing, thereby preventing defects in welding portions that may occur during manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figures 1 to 3 1 is a diagram showing a first portion, a second portion, and a third portion of a component manufactured by welding according to one embodiment of the present invention.

[0029] Figure 4 1 is a diagram showing a state in which a first portion and a second portion of a component manufactured by welding according to an embodiment of the present invention are coupled.

[0030] Figure 5 It is intercepted Figure 4 A cross-sectional view of the AA portion of the component shown.

[0031] Figure 6 : is a diagram showing a state in which components manufactured by welding according to one embodiment of the present invention are all joined.

[0032] Figure 7 It is intercepted Figure 6A cross-sectional view of the component taken along line BB is shown.

[0033] Figure 8 It is intercepted Figure 6 A cross-sectional view of the CC portion of the component shown.

[0034] Fig. 9 It is intercepted Figure 6 A cross-sectional view of the DD portion of the component shown.

[0035] Fig.10 yes Figure 2 An enlarged view of part A of the second section is shown.

[0036] Description of Reference Numerals

[0037] 100: Part 1 300: Part 2

[0038] 500: Part 3 DETAILED DESCRIPTION

[0039] Figures 1 to 3 1 is a diagram showing a first portion, a second portion, and a third portion of a component manufactured by welding according to one embodiment of the present invention, Figure 4 1 is a diagram showing a state in which a first part and a second part of a component manufactured by welding according to an embodiment of the present invention are combined, Figure 5 It is intercepted Figure 4 A cross-sectional view of the AA portion of the component shown, Figure 6 1 is a diagram showing a state in which components manufactured by welding according to one embodiment of the present invention are all joined, Figure 7 It is intercepted Figure 6 A cross-sectional view of the BB portion of the component shown, Figure 8 It is intercepted Figure 6 A cross-sectional view of the CC portion of the component shown, Fig. 9 It is intercepted Figure 6 A cross-sectional view of the DD portion of the component shown, Fig.10 yes Figure 2 An enlarged view of part A of the second section is shown.

[0040] The present invention relates to a component manufactured by welding, in which a plurality of panels are cross-welded to each other by welding such as laser brazing, thereby preventing defects in welding locations that may occur during manufacturing, and a manufacturing method thereof.

[0041] Figures 1 to 31 is a diagram showing a first part 100, a second part 300 and a third part 500 of a component manufactured by welding according to an embodiment of the present invention. The component manufactured by welding of the present invention comprises: the first part 100, which is provided with a first joint portion 120; the second part 300, which is provided with a second joint portion 320 and a cross joint portion 340 intersecting the second joint portion 320, and is combined with the first part 100 so that a part 122 of the first joint portion overlaps with the second joint portion 320, and the second joint portion 320 and the first joint portion 340 are overlapped. Part 120 is first welded W1; and the third part 500 is provided with a third joint part 520, a part 524 of the third joint part overlaps with another part 124 of the first joint part, and the remaining part 522 of the third joint part overlaps with the cross joint part 340, and each overlapping part is post-welded W2 to be combined with the first part 100 and the second part 300, and a rigid reinforcement part 360 is formed in the first part 100, the second part 300 or the third part 500 at a position where the first weld W1 and the post-weld W2 intersect each other.

[0042] Specifically, the present invention is a case where three parts are composed into one component assembly, for example, it is equivalent to a case where panels are joined by welding.

[0043] As an embodiment to which the present invention can be applied, an outer panel assembly constituting the outer surface of a tail panel of a vehicle is provided, wherein the first part 100 can be an upper panel of the outer panel assembly of the tail panel of the vehicle, the third part 500 can be a lower panel of the outer panel assembly of the tail panel, and the second part 300 can be an extended panel disposed between the upper panel and the lower panel of the outer panel assembly of the tail panel. However, the technical concept of the present invention is not only applicable to tail panels, but can also be applied to door panels or various external panels of vehicles and various industrial components.

[0044] In the present invention, since a thin panel is used, it is difficult to ensure the rigidity of the material itself, and therefore the panel may be deformed by external force when clamped for welding. In addition, in the present invention, the first welding W1 and the second welding W2 may be laser welding, specifically, laser brazing. In this case, when the welding line crosses WC, the thermal stress becomes too large and deformation occurs, and pinholes and the like may be generated due to excessive springback. Therefore, in order to solve this problem, the present invention proposes a structure that further imparts rigidity by changing the shape of the panel to prevent deformation and poor welding.

[0045] Specifically, Figure 1 The first portion 100 is shown, and as shown, the first engaging portion 120 is provided at the lower end of the first portion 100 . Figure 2The second part 300 is shown, and the second joint part 320 is provided at the upper end of the second part 300, and the cross joint part 340 intersecting the second joint part 320 is provided at the lower end of the second part 300. Figure 4 As shown, the second part 300 is combined with the first part 100 so that a portion 122 of the first joint portion overlaps the second joint portion 320. Then, the second joint portion 320 and the first joint portion 120 are pre-welded W1.

[0046] Figure 3 The third part 500 is shown, and the third part 500 is provided with a third joint portion 520. Figure 6 As shown, a portion 524 of the third joint portion overlaps with another portion 124 of the first joint portion, and the remaining portion 522 of the third joint portion overlaps with the cross joint portion 340, and each overlapping portion is post-welded W2, thereby combining the first portion 100, the second portion 300, and the third portion 500. Through this process, the first portion 100, the second portion 300, and the third portion 500 are combined with each other by welding.

[0047] In this case, there is no problem when the welding lines do not cross each other. However, as described in the present invention, at the position WC where the first weld W1 and the rear weld W2 cross each other, the deformation and thermal stress of the material caused by clamping are too large, so that material breakage or pinholes may occur due to the springback phenomenon. Therefore, the rigid reinforcement part 360 is formed in the first part 100, the second part 300 or the third part 500 near the position where the first weld W1 and the rear weld W2 cross each other.

[0048] The rigid reinforcement part 360 gives the material rigidity to prevent the material from rebounding after welding due to the pressure applied during welding, prevent poor quality due to rebound caused by thermal stress after welding, and overcome problems such as the appearance of steps when performing post-welding W2 due to rebound. In particular, in the case of pinholes, the rigid reinforcement part 360 can be applied to plug the pinholes with a sealant, etc., so that the painted surface can be kept smooth during subsequent painting.

[0049] Specifically, the first joint part 120, the second joint part 320, the cross joint part 340 and the third joint part 520 can be respectively provided at the first flange, the second flange and the third flange formed along the edges of the first part 100, the second part 300 and the third part 500. The first flange, the second flange and the third flange are edge portions of the panel bent to form a surface shape having a predetermined area, so that the first flange, the second flange and the third flange play the role of the subsequent first joint part 120, the second joint part 320, the cross joint part 340 and the third joint part 520.

[0050] In addition, the first part 100, the second part 300 and the third part 500 can be made of the same or different metal materials. In particular, aluminum can be joined by laser welding, etc. Aluminum has good elongation but is also easy to break, so when applied to the present invention, a great effect can be obtained.

[0051] On the other hand, Figure 2 As shown, the second joint portion 320 and the cross joint portion 340 are arranged along the edge division area of ​​the second part 300, so that the second joint portion 320 and the cross joint portion 340 can cross each other at a position where they intersect each other. In the illustrated embodiment, the positions where the second joint portion 320 and the cross joint portion 340 intersect each other are formed at both ends of the second part 300.

[0052] In addition, if Fig.10 As shown, the rigid reinforcement part 360 can be a groove shape recessed into a predetermined depth. At the position where the second joint part 320 of the second part 300 intersects with the cross joint part 340, the rigid reinforcement part 360 is formed at a position between the second joint part 320 and the cross joint part 340. In particular, as shown in the figure, the rigid reinforcement part 360 can be formed at a position between the second joint part 320 and the cross joint part 340, biased toward the second joint part 320 side.

[0053] Specifically, a rigid reinforcement part 360 is provided at a position between the second joint part 320 and the cross joint part 340, which is biased toward one side of the second joint part 320, and the rigid reinforcement part 360 may be in the shape of a groove recessed to a predetermined depth to connect to the second joint part 320. In addition, a sealant may be filled in the recessed position of the rigid reinforcement part 360. For the sealant, a sealing gun is used to apply the sealant to the sealing object part, but the sealing gun cannot fully reach the narrow position as described in the present invention. In addition, since it is difficult to control the application of a small amount of sealant in reality, it is inevitable to apply a predetermined amount of sealant. Due to this problem, there is a phenomenon that the sealant is applied to a position other than the desired position of the pinhole, etc., resulting in a subsequent poor coating problem. In the present invention, the sealant is first applied to the recessed position of the rigid reinforcement part 360, so that even if a slightly excessive amount of sealant is applied, the coating surface can be prevented from being poor by filling the groove, and even if a pinhole is generated, the pinhole can be filled and blocked by spreading the partially filled sealant to the side. Even if pinholes or the like are generated at a position where the first weld W1 and the second weld W2 intersect each other, they can be blocked by the sealant.

[0054] On the other hand, in the second part 300, the second joint portion 320 and the cross joint portion 340 are separated from each other at the remaining positions except the position where the second joint portion 320 and the cross joint portion 340 intersect each other, and the second joint portion 320 and the cross joint portion 340 are separated by a predetermined interval, so that a plurality of rigid reinforcement portions 360, 360' can be formed.

[0055] Specifically, the manufacturing method of the component of the present invention includes the following steps: forming a rigid reinforcement portion 360 in the first part 100, the second part 300 or the third part 500 near the position where the first welding W1 and the second welding W2 intersect each other; performing the first welding W1 in a state where a part of the first joint 122 and the second joint 320 are overlapped and pressurized, thereby combining the first part 100 and the second part 300; and pressurizing and performing the second welding W2 in a state where a part 524 of the third joint is overlapped with another part 124 of the first joint and the remaining part 522 of the third joint is overlapped with the cross joint 340, thereby combining the first part 100, the second part 300 and the third part 500.

[0056] First, if Fig.10 As shown, the following steps are performed, that is, the rigidity reinforcement part 360 is formed in the first part 100, the second part 300 or the third part 500 adjacent to the position where the first weld W1 and the second weld W2 cross each other.

[0057] In addition, if Figure 4 As shown in FIG. 1 , the following steps are performed, that is, the first part 100 and the second part 300 are joined by performing preliminary welding W1 in a state where a portion 122 of the first joint portion 120 and the second joint portion 320 are overlapped and pressurized. In this step, the first joint portion 122 and the second joint portion 320 are overlapped and pressed up and down by a clamp or the like so that the two joint portions are closely attached, as shown in FIG. Figure 5 Laser brazing is performed as shown in the cross section of FIG. By this method, the outer upper panel of the tail panel and the extension panel are joined. In addition, as shown in the figure, the outer upper panel of the tail panel and the extension panel are joined at an angle of nearly 90 degrees, so that despite the low formability, it also has an excellent appearance design.

[0058] In addition, if Figure 6 As shown, the following steps are performed to complete the assembly, namely, pressurizing is performed while a portion 524 of the third joint is overlapped with another portion 124 of the first joint and the remaining portion 522 of the third joint is overlapped with the cross joint 340, and post-welding W2 is performed to combine the first part 100, the second part 300 and the third part 500.

[0059] Figure 7 It is intercepted Figure 6A cross-sectional view of the BB portion of the component shown, Figure 8 It is intercepted Figure 6 A cross-sectional view of the CC portion of the component shown, Fig. 9 It is intercepted Figure 6 A cross-sectional view of the DD portion of the component shown.

[0060] As described above, in a state where a portion 524 of the third joint portion and another portion 124 of the first joint portion are overlapped and pressurized, as shown in FIG. Figure 7 As shown, the post-welding W2 is performed. In addition, the remaining portion 522 of the third joint portion is overlapped with the cross joint portion 340 and pressurized, and Fig. 9 This post-welding W2 is performed continuously as a single process, in which case, Figure 8 As shown, a portion where the later weld W2 and the earlier weld W1 intersect each other is generated, and quality problems such as pinholes may occur here.

[0061] To solve these problems, Fig.10 As shown, in the present invention, a rigid reinforcement part 360 is preformed in the second part 300, and the rigid reinforcement part 360 can be set at a position between the second joint part 320 and the cross joint part 340, which is biased to the second joint part 320 side. Specifically, the rigid reinforcement part 360 can be a groove shape recessed to a predetermined depth to connect to the second joint part 320. In addition, the recessed position of the rigid reinforcement part 360 can be filled with a sealant, and even if a pinhole is formed at the position WC where the first welding W1 and the rear welding W2 intersect each other, when the corresponding position is filled by manual operation, etc., the sealant can be filled into the pinhole. When the sealant is filled into the pinhole generated in the absence of the rigid reinforcement part 360, a coating quality problem may occur, such as the residual part of the sealant protruding during subsequent coating.

[0062] Specifically, Figure 6 : is a diagram showing a state in which components manufactured by welding according to one embodiment of the present invention are all joined. Fig.10 yes Figure 2 FIG. 1 is an enlarged view of the A portion of the second part 300 shown in FIG. 1 . As shown in the above figure, the two side ends of the first part 100 and the third part 500 are welded to each other, and the facing central parts are separated from each other, the second part 300 is arranged in the central part, and the first welding W1 and the rear welding W2 intersect each other in a manner of forming an acute angle at the position where the first part 100, the second part 300 and the third part 500 intersect each other. As described above, for the position where the acute angle is formed, the welded parts are arranged close to each other, so a large stress is applied based on the intersection position WC. Therefore, by forming the rigid reinforcement part 360 to ensure rigidity in advance, the quality of welding and painting can be ensured.

[0063] In addition, the rear weld W2 may cross the position separated from the end of the first weld W1 by a predetermined distance. When the rear weld W2 crosses the end of the first weld W1, a warping phenomenon may occur when the third part 500 is combined due to the condensation part of the weld bead caused by the first weld W1. Therefore, this problem can be solved by making the rear weld W2 cross the position separated from the end W1' of the first weld W1 by a predetermined distance.

[0064] According to the component manufactured by welding and the manufacturing method thereof of the present invention, a plurality of panels are welded to each other crosswise by welding such as laser brazing, thereby preventing defects in welding portions that may occur during manufacturing.

[0065] Although specific embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that various modifications and changes may be made to the present invention without departing from the scope of the technical idea of ​​the present invention as provided in the claims.

Claims

1. A component manufactured by welding, characterized in that include: The first part is provided with a first joint portion; The second part is provided with a second joint portion and a cross joint portion intersecting the second joint portion, and is combined with the first part in such a manner that a part of the first joint portion overlaps with the second joint portion, and the second joint portion and the first joint portion are first welded; and The third part is provided with a third joint portion, a part of the third joint portion overlaps with another part of the first joint portion, and the remaining part of the third joint portion overlaps with the cross joint portion, and each overlapping part is post-welded to be combined with the first part and the second part, wherein a rigid reinforcement portion is formed in the first portion, the second portion or the third portion adjacent to a position where the first welding and the second welding intersect each other, The rigid reinforcement portion is in the shape of a groove recessed to a predetermined depth. The recessed position of the rigid reinforcement portion is filled with a sealant. wherein the sealant is connected to and filled into the pinhole formed at the position where the first welding and the second welding cross each other, First, a sealant is applied to the concave position of the rigid reinforcement part to fill the concave position, and then the pinhole is filled and blocked by spreading the partially filled sealant to the side. wherein in the second portion, the second joint portion and the cross joint portion are spaced apart from each other at positions other than positions where the second joint portion and the cross joint portion intersect each other, and a plurality of rigid reinforcement portions are formed at predetermined intervals between the second joint portion and the cross joint portion, The first part is an upper panel of an outer panel assembly of a tail panel of a vehicle, the third part is a lower panel of an outer panel assembly of the tail panel, and the second part is an extended panel arranged between the upper panel and the lower panel of the outer panel assembly of the tail panel, wherein a plurality of panels are cross-welded to each other.

2. The component manufactured by welding according to claim 1, characterized in that The first welding and the last welding are laser welding.

3. The component manufactured by welding according to claim 1, characterized in that The first joint portion, the second joint portion, the cross joint portion, and the third joint portion are respectively provided on a first flange, a second flange, and a third flange formed along the edges of the first portion, the second portion, and the third portion.

4. The component manufactured by welding according to claim 1, characterized in that The first portion, the second portion and the third portion are made of the same or different metal materials.

5. The component manufactured by welding according to claim 1, characterized in that The second joining portion and the cross joining portion are arranged along the edge division area of ​​the second portion so that the second joining portion and the cross joining portion cross at a position where they intersect each other.

6. The component manufactured by welding according to claim 1, characterized in that At a position where the second joint portion of the second part intersects the cross joint portion, a rigidity reinforcement portion is formed at a position between the second joint portion and the cross joint portion.

7. The component manufactured by welding according to claim 6, characterized in that The rigidity reinforcing portion is formed at a position between the second joining portion and the cross joining portion, at a position biased toward the second joining portion.

8. The component manufactured by welding according to claim 6, characterized in that The rigid reinforcement portion is located between the second engagement portion and the cross engagement portion at a position biased toward the second engagement portion, and is in a groove shape recessed to a predetermined depth so as to be connected to the second engagement portion.

9. The component manufactured by welding according to claim 1, characterized in that The two side ends of the first part and the third part are welded to each other, and the facing central parts are separated from each other, the second part is arranged in the central part, and the first welding and the rear welding cross each other in a position where the first part, the second part and the third part cross each other to form an acute angle.

10. A method for manufacturing a component by welding, which is a method for manufacturing the component according to claim 1, comprising the following steps: forming a rigid reinforcement portion in the first portion, the second portion, or the third portion adjacent to a position where the first weld and the second weld intersect each other; Preliminary welding is performed in a state where a part of the first joint portion and the second joint portion are overlapped and pressurized, thereby joining the first portion and the second portion; as well as The first part, the second part and the third part are joined by applying pressure and performing post-welding in a state where a part of the third joint part overlaps with another part of the first joint part and the remaining part of the third joint part overlaps with the cross joint part, The rigid reinforcement portion is in the shape of a groove recessed to a predetermined depth. The recessed position of the rigid reinforcement portion is filled with a sealant. wherein the sealant is connected to and filled into the pinhole formed at the position where the first welding and the second welding cross each other, First, a sealant is applied to the concave position of the rigid reinforcement part to fill the concave position, and then the pinhole is filled and blocked by spreading the partially filled sealant to the side. wherein in the second portion, the second joint portion and the cross joint portion are spaced apart from each other at positions other than positions where the second joint portion and the cross joint portion intersect each other, and a plurality of rigid reinforcement portions are formed at predetermined intervals between the second joint portion and the cross joint portion, The first part is an upper panel of an outer panel assembly of a tail panel of a vehicle, the third part is a lower panel of an outer panel assembly of the tail panel, and the second part is an extended panel arranged between the upper panel and the lower panel of the outer panel assembly of the tail panel, wherein a plurality of panels are cross-welded to each other.

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