KR20170062640A

KR20170062640A - Door assembly for vehicles

Info

Publication number: KR20170062640A
Application number: KR1020150167791A
Authority: KR
Inventors: 임정욱; 김응천; 김장수; 최문석
Original assignee: 주식회사 엠에스 오토텍
Priority date: 2015-11-27
Filing date: 2015-11-27
Publication date: 2017-06-08
Also published as: KR101770127B1

Abstract

A door assembly incorporating a lightweight alloy such as a magnesium alloy is introduced. The door assembly is manufactured by welding the separately formed three parts (10, 20.30) to each other, and it is possible to secure the door rigidity at the level of the steel door have.

Description

{DOOR ASSEMBLY FOR VEHICLES}

The present invention relates to a door assembly, in particular to a door assembly to which a lightweight alloy such as a magnesium alloy is applied.

One of the biggest issues in the vehicle manufacturing industry is light weight. At least, it should be possible to achieve weight reduction while ensuring equal strength and stability with existing ones.

Application of ultrahigh strength steels is expanding to achieve lighter weight. Various reinforcements can be omitted, which helps to reduce weight. However, since steel is used basically, there is a limit in the range of weight reduction.

In addition to steel, attempts to reduce weight through the application of lightweight alloys such as aluminum or magnesium are also active. Among these, magnesium is the lightest metal, which can be lightened by 60% compared to steel and can be recycled, so there are many possibilities as lightweight materials.

However, magnesium has poor moldability, has about four times less rigidity than steel, and has poor bonding performance. At present, magnesium alloys are partially applied to casting products, but there is no application yet for plate parts manufactured like a door, and the contribution to weight reduction is small.

An object of the present invention is to provide a door assembly for a vehicle using a magnesium alloy plate, which is constructed to replace a conventional steel door by making up for the disadvantages of the magnesium alloy.

To replace existing steel doors with magnesium alloys, stiffness enhancement is needed. When the steel has a thickness of 1, magnesium is required to have a thickness of 1.67 in order to exhibit the same rigidity as steel. This increase in thickness can not be a solution.

Considering the door assembly of magnesium alloy, frame rigidity and side door strength need to be considered as the object of rigidity supplementation, and rigid response to door sag or over opening is needed.

The side door strength is designed to reduce the injury of a passenger in the event of a side collision. The test is to apply a continuous load at a speed of 12.7 mm / sec or less until the total displacement reaches 460 mm on the outside surface of the side door from the door side to the inside of the vehicle Lt; / RTI >

The present invention is the research result of the task of "Development of High Performance Magnesium Sheet" of the Industrial Technology Innovation Project (WPM) supported by the Ministry of Commerce, Industry and Energy and the Korea Industrial Technology Evaluation and Management Institute (KEIT).

According to an aspect of the present invention, there is provided an automotive door assembly including an inner panel and an outer panel hemmingly coupled to the inner panel, wherein the door inner panel comprises three parts. By forming the inner panel into three parts and welding them together, it is possible to overcome the embossability problem of the magnesium alloy sheet material.

According to an embodiment, the inner panel comprises a window frame; A body panel disposed at a lower portion of the window frame and corresponding to an area where the door trim is to be mounted; And a flange surrounding the remaining upper and outer edges of the body panel.

Window frames and body panels, body panels and flanges can be welded together along the edges. Since the body panel has a step along the edge thereof, there is a possibility that the body panel is defective in the press forming process. Therefore, it is preferable to divide into three parts and weld each other after press forming.

According to the embodiment, at least one of the front edge and the rear edge in the horizontal direction of the upper edge of the body panel may have an area in which the three parts overlap each other. Preferably, the three parts are overlapped with each other at both the front and rear ends so that the rigidity can be sufficiently reinforced.

Also according to an embodiment, the door assembly may further include a door hinged reinforcement that overlaps and joins them at the welding line W2 between the front end of the body panel and the flange and extends along the welding line W2. It is preferable that the upper end of the door hinge reinforcement is extended to the front end of the window frame to reinforce the rigidity reinforcement.

According to an embodiment, the door assembly may further include a latch reinforcement that overlaps and joins them at a weld line W2 between the rear end of the body panel and the flange and extends along the weld line W2. It is preferable that the upper end of the latch reel force is extended to the rear end portion of the window frame to reinforce the rigidity reinforcement.

In addition, according to the embodiment, the window frame has a structure of 'ㅁ' type composed of upper and lower frames, and front and rear frames, and the door assembly has a frame structure corresponding to this window frame, .

Further, according to the embodiment, the door assembly may further include a glass run channel fixed between the inner belt and the outer panel along the upper, rear, and front frames of the window frame. The glass run channel has a base and an open section with both legs extending therefrom for rigid reinforcement and the base except for the open section and the both leg sections are designed to form a closed end face.

According to the present invention, it is possible to provide a lightweight vehicle door using only a magnesium alloy plate in place of a steel plate material, which can solve the problem of egg casting of a magnesium alloy plate material.

Also, according to the present invention, it is possible to provide a door having a rigidity equivalent to that of a steel door even by using a magnesium alloy that is less rigid than steel.

The door assembly according to the present invention is superior in rigidity against movement of the door or against excessive opening, as well as rigidity against bumps or collisions during traveling through superposition of components and characteristic structural changes.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a part of a door inner panel according to an embodiment of the present invention,
2 and 3 are views showing the state before and after assembling the three parts constituting the inner panel shown in Fig.
Figure 4 is a cross-sectional view along the line AA in Figure 3,
5 is a cross-sectional view along the line BB in Fig. 3,
6 to 10 are views for explaining an assembling process of the door assembly according to the embodiment of the present invention,
11 is a cross-sectional view along the line CC in Fig. 10,
Fig. 12 is a view showing a cross section of a conventional door at a portion corresponding to Fig. 11. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same components or parts are denoted by the same reference numerals as much as possible for convenience of description.

It should be noted that in the present description, the front end portion and the rear end portion are for specifying the relative position between the members and do not necessarily refer to the front end portion and the rear end portion of the vehicle with respect to the vehicle.

1 to 3, the inner panel 100 of the door assembly according to the embodiment is composed of three parts 10, 20, and 30, and these three parts 10, (W1, W2).

1, the inner panel 100 includes a window frame 10, a body panel 20 corresponding to the area to which the door trim is to be mounted, and a flange 30 surrounding the remaining outer edges of the body panel 20, .

The upper and lower frames 11 and 14, the rear frame 12, and the front frames 13a and 13b are connected to each other by a window frame 10 defining a side window in which a window glass (not shown) Linked, 'ks' type structure.

The front frame 13 may include a first frame 13a and a second frame 13b. A window glass is disposed between the second frame 13b and the rear frame 12 and a plastic panel or glass can be fixedly installed between the first and second frames 13a and 13b.

The body panel 20 is disposed below the window frame 10 and the upper end of the body panel 20 overlaps the lower frame 14 of the window frame 10 and has a front end portion 23, a rear end portion 22, and a lower end portion 24, Is partially surrounded by the flange 30 and surrounded by the flange 30.

The flange 30 includes a lower flange 31 disposed along the lower end portion 24 of the body panel 20 and a front flange 33 and a rear flange 32 extending upwardly from the front and rear ends of the lower flange 31, . The front and rear flanges 32 and 33 surround the front end 23 and the rear end 22 of the body panel 20, respectively.

2 and 3, the window frame 10, the body panel 20, the body panel 20, and the flange 30 are welded to each other along the edges. In other words, the three parts 10, 20, and 30 along the weld lines W1 and W2 at the edges of the body panel 20 are overlapped and welded at positions corresponding to each other.

The two welding lines W1 and W2 shown in FIG. 3 are difficult to display the welding lines in the three parts 10, 20 and 30 themselves, I need to understand. W1 denotes a weld line between the window frame 10 and the body panel 20 and W2 denotes a weld line between the body panel 20 and the flange 30. [

4 and 5, there is a step in the boundary between the body panel 20 and the flange 30, and the welding line W2 is formed along the step. A step is also present at the boundary between the window frame 10 and the body panel 20, and a weld line W1 is also formed along the step.

The stepped section having a depth difference between the body panel 20 and the flange 30 has two steps and the body panel 20 and the flange 30 are formed along the first stepped section of the body panel 20, The welding line W2 between the welding wire W2 is extended. Naturally, the body panel 20 and the flange 30 are overlapped with each other along the welding line W2.

Referring again to FIG. 3, at least one of the horizontal front end area OL2 and the rear end area OL1 of the edge of the upper body 21 of the body panel, preferably at least one of three parts (OL1, OL2) 20, and 30 overlap each other. By overlapping each other in the area where the parts 10, 20 and 30 contact with each other, the rigidity of the inner panel 100 is reinforced.

6 to 10, an additional stiffening structure of the door assembly to which the inner panel 100 composed of the three parts 10, 20, and 30 is applied will be described.

6, a door hinged-in force 110 is installed vertically along a welding line W2 between the front panel 23 of the inner panel 100 and the flange 110. As shown in FIG. The door hinge reinforcement 110 overlaps the two parts 20 and 30 in the width direction and the upper end thereof extends to the front end portion 13 of the window frame 10.

The door hinge reel force 110 is a member to which a door hinge (not shown) is attached and which supports the door hinge reel. Since the welding line W2 is superimposed on the welding line W2 as well as the rigidity corresponding to the door sagging and the excessive opening, it is possible to reinforce the strength with respect to the joint portion along the welding line W2. Further, ) Stiffness is good.

A latch reinforcement 120 is provided along the welding line W2 between the rear end 22 of the body panel 100 of the inner panel 100 and the flange 110 in the vertical direction. The latch reinforcement 120 also overlaps the two parts 20 and 30 in the width direction and extends to the rear end 12 of the window frame 10 like the door hinge reinforcement 110. [

The latch reel force 120 is a member to which a door latch (not shown) is mounted and which supports the door latch. The weld line W2 is formed so as to overlap with the weld line W2 to reinforce the joint portion along the welding line W2 and contributes to reinforcement of the rigidity of the window frame 10. [

Referring to FIG. 7, an inner belt 130 having a '?' Shaped frame structure corresponding to the window frame 10 is coupled to the window frame 10. The upper ends of the door hinge reinforcement 110 and the latch reinforcement 120 are disposed between the inner panel 100 and the inner belt 130 and overlap with these members. Preferably also over the welding line W1 between the window frame 10 and the body panel 20. [

The inner belt 130 reinforces the rigidity of the window frame 10 very effectively and strengthens the overall rigidity of the inner panel 100 together with the overlapping door hinge-in force 110 or the latch reinforcement 120 .

Referring to FIG. 8, a glass run channel 140 for guiding a window glass is provided on the inner belt 130. The glass run channel 140 includes an upper channel 140a, a rear channel 140b, and front channels 140c and 140d. The front channel may be composed of first and second channels 140c and 40d corresponding to the first and second frames 13a and 13b of the front frame 13. [

9, after the channel 140 is installed, the outer belt 150 and the impact beam 160 are installed in the horizontal direction, and the outer panel 200 is covered on the inner belt 100 as shown in FIG. 10, Respectively.

The inner and outer belts 130 and 150 guide the window glass (not shown) protruding and retracting from the lower frame 14 of the window frame 10 or the upper end 21 of the body panel 20 along the glass run channel 140 Function. That is, the gap between the inner and outer panels 100 and 200 is narrowed to support the glass that ascends and descends therebetween through a weather strip (not shown).

10 and 11, a glass run channel 140 is formed between the inner belt 130 and the outer panel 200 along the upper, rear, and front frames 11, 12, and 13 of the window frame 10 . A glass run channel 140 is coupled onto the inner belt 130 which is superimposed and bonded to the window frame 10 of the inner panel 100 and the outer panel 200 covering the glass run channel 140 is joined to the inner panel 100 and the hemming .

11, the glass run channel 140a has an opening section having a base 141 and two legs 142 and 143 extending therefrom. The glass run channel 140a includes a base 141 excluding the opening 144 into which the glass enters, The portions of both legs 142 and 143 form a closed end face. The channel 140 having a 'c' -shaped structure increases the rigidity of the window frame 10.

Fig. 12 shows a cross section of a conventional door with respect to a portion corresponding to Fig. It can be understood that the structure of FIG. 11 according to the embodiment is stronger than the structure of FIG. 12, and the frame rigidity is excellent.

In FIG. 12, reference numeral 1 denotes an inner panel, 2 denotes an outer panel, 3 denotes a channel, and 4 denotes a bracket for mounting a weather strip. In the conventional door, the glass run channel 3 is provided with a fitting groove 3a, and the channel 3 is fitted to the inner panel 1 by using the fitting groove 3a.

The above-described conventional fitting groove 3a structure weakens the rigidity of the glass run channel 3 and does not contribute to reinforcement of the rigidity of the window frame 10. According to the embodiment, the thickness and shape of the glass run channel 140 are changed to complement the rigidity, and the inner belt 130 is added to increase the rigidity of the window frame 10 as compared with the conventional art.

The door assembly according to the above-described embodiments can be manufactured using a magnesium alloy. It is possible to use only the necessary members of the door without using additional reinforcements, By designing the layout, it is possible to secure the door rigidity at the level of the steel door.

While the invention has been shown and described with respect to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention as set forth in the following claims.

1,100: Inner panel 10: Window frame
11: Upper frame 12: Rear frame
13: Front frame 14: Lower frame
20: body panel 30: flange
110: Door hinge reel force 120: latch reel force
130: inner belt 140: glass run channel
150: outer belt 200: outer panel

Claims

And an inner panel, and an outer panel joined to the inner panel by hemming,
Window frame;
A body panel disposed at a lower portion of the window frame and corresponding to a region to which the door trim is to be mounted; And
And a flange surrounding the remaining edges of the body panel other than the upper end of the body panel,
Wherein the window frame, the body panel, the body panel, and the flange are welded to each other along an edge thereof.

2. The automotive door assembly according to claim 1, wherein at least one of a front end and a rear end in the horizontal direction of the top edge of the body panel has an area in which three parts overlap each other.

The vehicle door according to claim 1, further comprising a door hinged reinforcement that is overlapped with and joined to the welding line (W2) between the front end of the body panel and the flange and extends along the welding line (W2) assembly.

The vehicle door assembly according to claim 3, wherein the upper end of the door hinge reinforcement extends to a front end portion of the window frame.

The vehicle door assembly according to claim 1, further comprising a latch reinforcement that overlaps and joins them at a weld line (W2) between the rear end of the body panel and the flange and extends along the weld line (W2) .

The vehicle door assembly according to claim 5, wherein the upper end of the latch reinforcement extends to a rear end of the window frame.

[2] The window frame of claim 1, wherein the window frame has a structure of 'ㅁ' type comprising an upper and a lower frame, and a front frame and a rear frame,
Further comprising an inner belt having a frame structure corresponding to the window frame and coupled to the window frame.

[7] The apparatus of claim 7, further comprising a glass run channel fixed between the inner belt and the outer panel along the upper, rear, and front frames of the window frame,
Wherein the glass run channel has an opening section having a base and both legs extending therefrom, and the base and both leg sections except the opening section form a closed end face.

A window frame, a body panel corresponding to an area where the door trim is to be mounted, and a flange surrounding a remaining edge of the body panel, the window frame and the body panel, An inner panel welded to each other along each edge of the panel and the flange;
A door hinged-in force which overlaps with and extends along the weld line (W2) between the front end of the body panel and the flange;
A latch reinforcement that overlaps and joins them at a weld line W2 between the rear end of the body panel and the flange and extends along the weld line W2; And
And an outer panel coupled to the inner panel along an edge thereof.

[Claim 11] The method of claim 9, wherein the window frame has a " k " -type structure including an upper and lower frame, and a front frame and a rear frame,
Further comprising an inner belt having a frame structure corresponding to the window frame and coupled to the window frame.

11. The vehicle door assembly according to claim 10, wherein upper ends of the door hinge reinforcement and the latch reinforcement are disposed between the inner panel and the inner belt and overlapped with the inner panel and the inner belt.

[12] The apparatus of claim 11, wherein at least one of a horizontal front edge and a rear edge of the upper edge of the body panel has a region where the three parts overlap with each other,
Wherein an upper end portion of at least one of the door hinged-in force and the latch reinforcement is overlapped with the three parts in the overlapped region.