KR102018958B1 - Sliding clincging device - Google Patents

Abstract

The present invention relates to a sliding clinching device for bonding dissimilar material thin plates and a method for joining dissimilar materials using the clinching device. More specifically, a clinching apparatus for laminating and joining a plurality of dissimilar component thin plates, comprising: a die having a mounting portion at an upper center end thereof; The die is fitted to fit the mounting portion of the die, the insertion portion is formed in the upper center end, the expansion end is formed on the outer peripheral surface of the lower portion of the insert portion, the plurality of pin mounting ends are formed radially on the upper outer portion and formed A holder in which a heterogeneous material thin plate in which a plurality of dissimilar parts thin plates are stacked is located; A plurality of press pins mounted on each of the pin mounting ends; And a punch for pressing the dissimilar material thin plate after the dissimilar material thin plate is positioned on the holder to press the insert portion of the holder to join the dissimilar material thin plate. It is about.

Description

Sliding clinching device for bonding dissimilar material thin plate and dissimilar material thin plate joining method using the clinching device {Sliding clincging device}

The present invention relates to a sliding clinching device for bonding dissimilar material thin plates and a method for joining dissimilar materials using the clinching device.

In general, laser welding using a laser beam output from a laser oscillator or electric resistance welding using a spot welder are mainly applied to overlap two metal sheets together in an industrial field.

In general laser welding systems for welding steel sheet material using a laser beam, a laser head is installed at the arm tip of the robot, which is connected to a laser oscillator. The robot is controlled by the robot controller to move the laser head along the welding pattern of the material and to irradiate the laser beam to perform the welding operation.

On the other hand, in recent years, according to the trend of high strength and light weight of the vehicle body, a case of applying a composite plate as well as a metal plate or non-ferrous metal plate material as a body material has been widely applied.

However, these materials are expensive and the raw materials themselves are limited to bonding or mechanical joining methods. Especially, welding between different materials is impossible due to the physical properties of the two materials, but laser welding or spot welding is impossible. Is even more impossible.

Furthermore, in the prior art, when joining different materials by bonding or mechanical joining, the joined body of the different materials can be easily separated in the tensile direction (shear direction).

In addition, the clinching technique may be applied as a mechanical bonding method for dissimilar materials. 1A to 1C are cross-sectional views illustrating a flow of a method of bonding dissimilar materials using the clinching device 1 without using a conventional punch, die, and holder.

As shown in FIGS. 1A-1C, it can be seen that the clinching device 1 comprises a die 20, a holder 30, and a punch 10. As shown in FIGS. 1A to 1C, after the holder 30 is mounted on the mounting portion 21 of the die 20, the punch 10 is press-fitted into the insertion portion 31 of the holder 30. The thin plates 4 are bonded to each other.

In other words, the two dissimilar material plate 4 is overlapped, and then bonded by pressing to fix it so as not to fall out.

In the conventional clinching method, there is no need for additional bonding elements, light weight, eco-friendly processing, short process time, and dynamic strength improvement compared to spot welding, but the bonding strength is significantly higher than that of conventional spot welding. There is a disadvantage that can only be reduced.

In order to compensate for these disadvantages, as shown in FIGS. 1A to 1C, it can be seen that the expansion force 33 is formed on the outer circumference of the lower surface of the holder 30 to improve the bonding force.

2A to 2C show photographs of a vehicle body door manufactured by a conventional clinching method.

However, in the case of the conventional clinching method, the bonding strength is still only 50 to 70% of spot welding, there is a concern that intensive stress occurs in shape, and it is difficult to apply to high-strength materials, and there is no trace of deformation of the material. There is a problem that there is a possibility of separation between the plates.

Therefore, the development of improved clinching technology to increase the bonding strength of the clinching and solve the concentrated stress was required.

Republic of Korea Patent No. 1304897 Republic of Korea Patent Publication No. 2009-0108693 Republic of Korea Patent No. 0626106

Therefore, the present invention has been made to solve the above-mentioned conventional problems, according to an embodiment of the present invention, to improve the bonding strength of the clinching and to solve the concentrated stress to solve the disadvantages of the conventional clinching coupling method automotive parts And it is an object of the present invention to provide a sliding clinching device for joining dissimilar material thin plate that can expand its application field, such as home appliance assembly, and a dissimilar material thin plate bonding method using the clinching device.

In addition, according to an embodiment of the present invention, the cost efficiency is better than spot welding, the bonding strength can be increased by about 20% than the conventional clinching coupling method, the process time is faster, the dynamic strength is compared to the spot welding, and the weight is reduced Sliding for joining different material sheets that can realize eco-friendliness, do not need additional joining elements, are useful for various material combinations, save energy, produce no noise during process, and check the joining quality with the naked eye without product damage An object of the present invention is to provide a clinching device and a method for joining dissimilar materials using the clinching device.

On the other hand, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly to those skilled in the art from the following description. It can be understood.

A first object of the present invention is a clinching apparatus for laminating a plurality of dissimilar material thin plates and then bonding them, comprising: a die having a mounting portion at an upper center end thereof; The die is fitted to fit the mounting portion of the die, the insertion portion is formed in the upper center end, the expansion end is formed on the outer peripheral surface of the lower portion of the insert portion, the plurality of pin mounting ends are formed radially on the upper outer portion and formed A holder in which a plurality of dissimilar material plates are positioned upward; A plurality of press pins mounted on each of the pin mounting ends; And a punch for pressing the dissimilar material thin plate after the dissimilar material thin plate is positioned on the holder and press-fitting the insertion part of the holder to join the dissimilar material thin plate. Can be achieved.

And the punch, a plurality of sliding grooves are formed radially on the basis of the flat cross-section along the outer surface from the upper surface, the lower end of the sliding groove may be characterized in that it has a tapered surface to increase the diameter toward the lower side.

In addition, the inner surface of each of the press pins may have a protruding end portion and a top inclined surface and a lower inclined surface based on the protruding end.

In addition, the press-fitting portion press-fitted by the sliding clinching device may be characterized in that the lower end outer circumferential surface has an extended portion, and a concave end is formed at one side outer peripheral portion thereof.

According to a second aspect of the present invention, there is provided a method for bonding dissimilar material plates using a sliding clinching device according to the first object, the method comprising: mounting a press pin on each pin mounting end of a holder; Inserting the holder into a mounting portion of a die; Positioning a dissimilar material thin plate on the holder; And inserting a punch into an insert portion of the holder to form a press-fitted portion in a heterogeneous material thin plate, wherein the joining includes sliding the lower outer surface of the punch along an upper inclined surface of the press pin and pressing the press pin. After the lower inclined surface of the sliding along the tapered surface of the punch, the protrusion of the press pin is achieved as a heterogeneous material bonding method using a sliding clinching device, characterized in that the punch is press-fitted along the sliding groove of the punch. Can be.

According to the sliding clinching device for joining the dissimilar material thin plate according to an embodiment of the present invention and the method for joining the dissimilar material thin plate using the clinching device, the conventional clinching coupling method by increasing the bonding strength of the clinching and solving the concentrated stress Complement the disadvantage of the has the effect of expanding the application field, such as assembly of automobile parts and home appliances.

In addition, according to the sliding clinching device for joining the dissimilar material thin plate according to an embodiment of the present invention and the dissimilar material thin plate joining method using the clinching device, it is more cost-effective than spot welding and compared to conventional clinching coupling method Bonding strength can be increased by about 20%, process time is fast, dynamic strength is compared with spot welding, light weight and eco-friendly can be realized, no additional bonding elements are needed, it is useful for various material combinations, and energy saving process Noise is not generated during the test, and there is an advantage that the quality of the joint can be checked without visual damage.

On the other hand, the effect obtained in the present invention is not limited to the above-mentioned effects, other effects that are not mentioned will be clearly understood by those skilled in the art from the following description. Could be.

The following drawings, which are attached to this specification, illustrate one preferred embodiment of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be construed as limited.
1a to 1c is a cross-sectional view showing a flow of a method of joining dissimilar materials without consumables using a conventional punch, die, holder.
2a to 2c is a photograph of the body door manufactured by a conventional clinching method,
Figure 3 is a cross-sectional view of the sliding clinching device for bonding the different material thin plate according to an embodiment of the present invention,
Figure 4 is a cross-sectional view of a different material thin plate applied to the sliding clinching device according to an embodiment of the present invention,
5 is a perspective view of a punch according to an embodiment of the present invention,
6A is a perspective view of a die in accordance with an embodiment of the present invention.
6B is a perspective view of a holder according to an embodiment of the present invention;
6c is a perspective view of a press pin according to an embodiment of the present invention;
7 is a partial perspective view of the press-fitted portion formed by the sliding clinching apparatus according to the embodiment of the present invention.
8 is a cross-sectional view of the press-fitted portion formed by the sliding clinching apparatus according to the embodiment of the present invention.

Objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure may be made thorough and complete, and to fully convey the spirit of the invention to those skilled in the art.

In the present specification, when a component is mentioned to be on another component, it means that it may be formed directly on the other component or a third component may be interposed therebetween. In addition, in the drawings, the thickness of the components are exaggerated for the effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional and / or plan views, which are ideal exemplary views of the present invention. In the drawings, the thicknesses of films and regions are exaggerated for effective explanation of technical content. Therefore, the shape of the exemplary diagram may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in forms generated according to manufacturing processes. For example, the region shown at right angles may be rounded or have a predetermined curvature. Thus, the regions illustrated in the figures have properties, and the shape of the regions illustrated in the figures is intended to illustrate a particular form of region of the device and is not intended to limit the scope of the invention. Although terms such as first and second are used to describe various components in various embodiments of the present specification, these components should not be limited by such terms. These terms are only used to distinguish one component from another. The embodiments described and illustrated herein also include complementary embodiments thereof.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the words 'comprises' and / or 'comprising' do not exclude the presence or addition of one or more other components.

In describing the specific embodiments below, various specific details are set forth in order to explain the invention more specifically and to help understand. However, those skilled in the art can understand that the present invention can be used without these various specific details. In some cases, it is mentioned in advance that parts of the invention which are commonly known in the description of the invention and which are not highly related to the invention are not described in order to prevent confusion in explaining the invention without cause.

Hereinafter, the structure, function, and bonding method using the sliding clinching device 100 of the sliding clinching device 100 for bonding the dissimilar material thin plate 4 according to the embodiment of the present invention will be described. First, Figure 3 shows a cross-sectional view of the sliding clinching device 100 for bonding the different material thin plate 4 according to an embodiment of the present invention. And Figure 4 shows a cross-sectional view of the dissimilar material sheet 4 is applied to the sliding clinching device 100 according to an embodiment of the present invention.

5 illustrates a perspective view of a punch 10 according to an embodiment of the present invention. 6A illustrates a perspective view of a die 20 according to an embodiment of the present invention, FIG. 6B illustrates a perspective view of a holder 30 according to an embodiment of the present invention, and FIG. The perspective view of the press pin 40 according to the embodiment is shown.

As shown in FIG. 3, the sliding clinching apparatus 100 according to the embodiment of the present invention includes a die 20, a holder 30, a press pin 40, a punch 10, and the like. Can be. As shown in FIG. 4, the first material thin plate 2 (eg, steel) and the second material thin plate 3 (eg, aluminum) by the sliding clinching device 100 according to the embodiment of the present invention. ), The press-fitting part 5 is formed on the heterogeneous material thin plate 4 laminated with the first material thin plate 2 and the second material thin plate 3.

As shown in FIGS. 3 and 6A, the die 20 of the sliding clinching apparatus 100 according to the embodiment of the present invention may be seen that the mounting portion 21 is formed at the upper center end. That is, it consists of the cup forming the diameter increases to the upper side. The holder 30 is inserted into and fitted into the fixing unit.

Holder 30 of the sliding clinching device 100 according to an embodiment of the present invention, as shown in Figs. 3 and 6b, is fitted to the mounting portion 21 of the die 20 is inserted and mounted, the upper center It can be seen that the insertion portion 31 is formed at the end. Then, the expansion end 33 is formed on the outer peripheral surface of the lower portion of the insertion portion 31 to the outside. In addition, a plurality of pin mounting ends 32 are formed radially on the upper outer side, and the heterogeneous material thin plates 4 are positioned upwards during molding.

As shown in FIG. 6B, three pin mounting ends 32 may be radially formed, and the depth of the insertion part 31 may be greater than that of the pin mounting ends 32.

Each of the pin mounting ends 32 of the holder 30 is equipped with a press pin 40. As shown in FIGS. 3 and 6C, the inner surface of each of the press pins 40 has a protruding end 41 at the stop portion, and an upper slope 42 and a lower slope 43 based on the protruding end 41. It can be seen that

And the punch 10 of the sliding clinching device 100 according to an embodiment of the present invention, as shown in Figures 3 and 5, after the different material thin plate 4 is located on the holder 30, the holder It can be seen that the press-fitted portion 31 of the 30 to form a press-fitting portion 5 in the heterogeneous material thin plate 4 to be bonded to the heterogeneous material thin plate (4).

The punch 10 according to the embodiment of the present invention, three sliding grooves 11 are formed radially on the basis of the flat cross-section along the outer surface from the upper surface. And it can be seen that the lower end portion of the sliding groove 11 has a tapered surface 12 whose diameter increases to the lower side.

7 shows a partial perspective view of the press-fit portion 5 formed by the sliding clinching device 100 according to the embodiment of the present invention. 8 illustrates a cross-sectional view of the press-fit portion 5 formed by the sliding clinching apparatus 100 according to the embodiment of the present invention.

As shown in FIG. 7 and FIG. 8, the press-fitting part 5 press-fitted by the sliding clinching device 100 has an extension part 7 on the lower outer peripheral surface, and the concave end 6 is formed on the upper peripheral part of the side surface. It can be seen that it is formed. Therefore, the expansion part 7 and the concave end 6 are formed, thereby increasing the bonding strength of the clinching and solving the concentrated stress.

Hereinafter, a method for joining the dissimilar material thin plate 4 by using the aforementioned sliding clinching device 100 will be described. First, the press pin 40 is mounted on each of the pin mounting ends 32 of the holder 30.

The holder 30 is inserted into and mounted on the mounting portion 21 of the die 20. Then, the heterogeneous material thin plate 4 is placed on the holder 30.

Then, the punch 10 is press-fitted into the inserting portion 31 of the holder 30 to form a press-fitting portion 5 in the heterogeneous material thin plate 4 to be joined.

In this bonding step, first, the lower outer surface of the punch 10 slides along the upper inclined surface 42 of the press pin 40, and the lower inclined surface 43 of the press pin 40 is tapered of the punch 10. It slides along the surface 12.

The punch 10 is press-fitted along the sliding groove 11 of the punch 10 to the lower surface of the insert 31 of the holder 30 as the protruding end 41 of the press pin 40 is press-fitted. Will be moved. Therefore, the punch 10 is completely moved to the lower surface of the holder 30, and the expansion portion 7 is formed on the outer circumferential surface of the lower surface of the press-fit portion 5 of the heterogeneous material thin plate 4, and the inner side of the lateral upper portion A protruding concave end 6 is formed.

That is, it can be seen that the press pin 40 is slid through the sliding groove 11 (friction surface) by the vertical movement of the punch 10 and the die 20 so that the horizontal movement is possible. In addition, the two dissimilar material sheet 4 is plastically deformed and deformed along the groove through simultaneous pressurization of the upper and lower presses, and additional pressurization of the press pin 40, and the concave portion is formed to be fixed without being pulled out. And soon after completion of the combination of the two dissimilar material plate 4 will have a structure capable of the initial setting state.

In addition, the above-described apparatus and method may not be limitedly applied to the configuration and method of the above-described embodiments, but the embodiments may be selectively combined in whole or in part in each of the embodiments so that various modifications may be made. It may be configured.

1: Conventional clinching device
2: first material sheet
3: second material thin plate
4: heterogeneous material thin plate
5: press-fitting
6: five corps
7: Extension
10: Punch
11: Sliding groove
12: Taper side
20: Die
21: Mounting part
It is a holder 30
It is an insertion part
32: pin mounting end
33: expansion stage
40: Press pin
41: protrusion
42: upper slope
43: Bottom slope
100: sliding clinching device

Claims (5)

In the clinching device for laminating a plurality of dissimilar material thin plate,
A die having a mounting portion at an upper center end thereof;
The die is fitted to fit the mounting portion of the die, the insertion portion is formed in the upper center end, the expansion end is formed on the outer peripheral surface of the lower portion of the insert portion, the plurality of pin mounting ends are formed radially on the upper outer portion and formed A holder in which a plurality of dissimilar material plates are positioned upward;
A plurality of press pins mounted on each of the pin mounting ends; And
After the dissimilar material plate is positioned on the holder, the punch is pressed into the insert portion side of the holder to bond the dissimilar material sheet;
The punch has a plurality of sliding grooves are formed radially from the upper surface along the outer surface along the outer surface, the lower end of the sliding groove has a tapered surface to increase in diameter to the lower side,
The inner surface of each of the press pin has a protruding end portion, the sliding clinching device for joining the different material thin plate, characterized in that it has an upper inclined surface and a lower inclined surface based on the protruding end.
delete delete The method of claim 1,
The press-fitting portion press-fitted by the sliding clinching device has an extended portion on the lower outer peripheral surface, and a concave end is formed on one side peripheral portion of the side surface.
In the method for bonding the dissimilar material thin plate using the sliding clinching device according to claim 1,
Mounting a press pin on each pin mounting end of the holder;
Inserting the holder into a mounting portion of a die;
Positioning a dissimilar material thin plate on the holder; And
And pressing a punch into an inserting portion of the holder to form a press-fitting portion in a heterogeneous material thin plate.
The joining may include sliding the lower outer surface of the punch along the upper inclined surface of the press pin and sliding the lower inclined surface of the press pin along the tapered surface of the punch. A method for joining dissimilar materials using a sliding clinching device, wherein a punch is press-fitted along a groove.

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