CN220130219U - Roof skin structure - Google Patents

Abstract

The utility model relates to a roof skin structure comprising: the automobile body skeleton, first skin and second skin, the first border of first skin welds on the target position of automobile body skeleton, and the second border of second skin welds on the target position of automobile body skeleton to make first skin and second skin be connected in the target position department of automobile body skeleton. The edges of the two layers of skins are welded on the same position of the car body framework respectively, so that the problem that the skins are easy to weld through by spot welding after the two layers of skins are overlapped is avoided.

Description

Roof skin structure

Technical Field

The utility model relates to the technical field of vehicles, in particular to a roof skin structure.

Background

Skin structures of vehicles are important components of body structures. When the existing steel skins are connected, the skin ends are covered for a certain distance beyond the framework for lap joint, specifically, a first layer of steel skin is adhered to the framework and fixed from the back surface by spot welding, and a second layer of steel skin is overlaid on the first layer of steel skin and then spot welded at the two layers of skin ends, but the two layers of steel skin are overlapped together and the skin ends are welded respectively, so that the skins are easy to weld through, and the risk of water leakage is increased.

In view of the above problems, no effective solution has been proposed at present.

Disclosure of Invention

The utility model provides a roof skin structure, which aims to solve the technical problems that two layers of skins are stacked together and skin ends are welded respectively so as to easily weld the skins through.

According to an aspect of an embodiment of the present utility model, there is provided a roof skin structure including: the automobile body skeleton, first skin and second skin, the first border of first skin welds on the target position of automobile body skeleton, and the second border of second skin welds on the target position of automobile body skeleton to make first skin and second skin be connected in the target position department of automobile body skeleton.

Optionally, the first skin is fixed at the target position by spot welding after being completely attached to the body frame.

Optionally, a plurality of uniformly arranged first welding spots obtained by spot welding exist between the first edge of the first skin and the target position, and the distance between the first welding spots is a first length.

Optionally, the second skin is fixed at the target position by spot welding after being completely attached to the body frame.

Optionally, a plurality of second welding spots which are obtained by spot welding and are uniformly distributed exist between the second edge of the second skin and the target position, and the distance between the second welding spots is the first length.

Optionally, a plurality of third welding spots obtained by welding are arranged between the first edge of the first skin and the second edge of the second skin, and the distance between each third welding spot is the second length.

Optionally, a third length is spaced between the first edge and the second edge, and the third length is used as a basis for trimming the second edge.

Optionally, the number of third pads is greater than the number of first pads or second pads.

Optionally, the second length is greater than the first length.

Optionally, the third welding spot is obtained by densely welding the target position through carbon dioxide gas shielded welding.

Compared with the related art, the technical scheme provided by the embodiment of the utility model has the following advantages:

the present utility model is directed to a roof skin structure comprising: the automobile body skeleton, first skin and second skin, the first border of first skin welds on the target position of automobile body skeleton, and the second border of second skin welds on the target position of automobile body skeleton to make first skin and second skin be connected in the target position department of automobile body skeleton. The edges of the two layers of skins are welded on the same position of the car body framework respectively, so that the problem that the skins are easy to weld through by spot welding after the two layers of skins are overlapped is avoided.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it will be apparent to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.

Fig. 1 is a schematic view of an alternative roof skin structure provided in accordance with an embodiment of the present utility model.

FIG. 2 is a schematic illustration of another alternative roof skin structure provided in accordance with an embodiment of the present utility model.

FIG. 3 is a schematic illustration of another alternative roof skin structure provided in accordance with an embodiment of the present utility model.

Fig. 4 is a schematic view of an alternative method for welding a roof skin structure according to an embodiment of the present utility model.

Fig. 5 is a schematic view of another alternative method for welding a roof skin structure according to an embodiment of the present utility model.

Fig. 6 is a schematic illustration of an alternative method of welding a roof skin structure provided in accordance with an embodiment of the present utility model.

Fig. 7 is a schematic view of another alternative method for welding a roof skin structure according to an embodiment of the present utility model.

Reference numerals: 102. a vehicle body skeleton; 1021. a target location; 104. a first skin; 106 a second skin.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the following description, suffixes such as "module", "component", or "unit" for representing elements are used only for facilitating the description of the present utility model, and are not of specific significance per se. Thus, "module" and "component" may be used in combination.

Skin structures of vehicles are important components of body structures. At present, when the steel skins of the vehicle are connected, the ends of the skins are covered by 10-15 mm beyond the framework for lap joint, then one layer of steel skin is stuck on the framework and fixed by spot welding from the back surface, after the two layers of steel skins are lapped on the one layer of skin, the ends of the two layers of skins are spot welded, the skins are easy to weld through due to the fact that the galvanized sheet steel skin is thinner, air holes are easy to be generated due to the fact that the steel skins are provided with zinc layers during welding, leakage prevention difficulty of lap joints of the skins is increased, water seepage and water leakage are easy to occur, and requirements on welding skills of workers are extremely high. Moreover, the anti-corrosion paint with the too wide overlap surface is difficult to permeate into the interlayer, so that the problem of rust and corrosion from the inside of the interlayer occurs, and the quality of the whole vehicle is affected.

To solve the problems mentioned in the background art, according to an aspect of an embodiment of the present utility model, there is provided a roof skin structure, as shown in fig. 1, including: the first edge of the first skin 104 is welded to the target position 1021 of the body frame 102, and the second edge of the second skin 106 is welded to the target position 1021 of the body frame 102, such that the first skin 104 and the second skin 106 are connected at the target position 1021 of the body frame 102.

The vehicle body frame of the present utility model refers to a frame of a roof portion of a vehicle.

In the prior art, the first layer of skin is welded on the car body framework, then the second layer of skin is overlapped on the first layer of skin, the welding is performed at the joint of the edge of the first layer of skin and the second layer of skin, and the welding is performed at the joint of the edge of the second layer of skin and the first layer of skin, so that the skin is easy to weld through. In order to avoid the problem, the utility model provides a roof skin structure, which avoids the problem that the skins are easy to weld through by spot welding after overlapping the two layers of skins by respectively welding the edges of the two layers of skins on the same position of a vehicle body framework.

Fig. 2 is a schematic view of a roof skin structure provided by the present utility model, where a first edge of a first skin and a second edge of a second skin are commonly connected to a vehicle body skeleton, and there is no overlapping portion between the first skin and the second skin.

As an alternative embodiment, the first skin is fixed at the target position by spot welding after being completely attached to the body frame.

For example, it is necessary to press the first skin against the target position of the vehicle body skeleton so that the first skin is completely adhered to the vehicle body skeleton, and then to perform tack welding.

The target position in the embodiment provided by the utility model is one half of the vehicle body framework, namely the first skin covers one half of the vehicle body framework, and the first edge is positioned on a bisector in the middle of the vehicle body framework.

The target position may be finely adjusted according to the actual situation, and the present utility model is not limited to this.

As an alternative embodiment, a plurality of uniformly arranged first welding spots obtained by spot welding exist between the first edge of the first skin and the target position, and the distance between each first welding spot is a first length.

Specifically, the first edge of the first skin is welded to the target location by tack welding, such that the first skin is welded to the body frame.

In the prior art, a more mature spot welding method exists, and the utility model does not limit the detailed spot welding mode.

And performing spot welding at the joint of the first edge and the target position, wherein the obtained first lengths of the intervals among the plurality of first welding spots are the same, the value range of the first lengths is [200, 250] mm, and the welding seam of each first welding spot is about [5, 10] mm.

Note that the pitch of each solder joint in the present utility model allows for a small error.

As an alternative embodiment, the second skin is fixed to the target position by spot welding after being completely attached to the body frame.

After the first skin is welded at the target position of the vehicle body framework, the second edge of the second skin is aligned with the target position on line, and then the second skin is completely attached to the vehicle body framework and then subjected to tack welding.

As an alternative embodiment, a plurality of second welding spots which are obtained by spot welding and are uniformly distributed are arranged between the second edge of the second skin and the target position, and the distance between the second welding spots is the first length.

Specifically, the second edge of the second skin is welded to the target location by tack welding, such that the second skin is welded to the body frame. Because the first skin is connected to the target position by the spot welding before, the second edge of the second skin is welded with the target position, and then the first skin and the second skin are welded together, so that the purpose of connecting the first skin, the second skin and the vehicle body framework is achieved.

Alternatively, the first welding spot and the second welding spot may be the same location or different locations.

As an alternative embodiment, a third length is spaced between the first edge and the second edge, the third length being used as a basis for trimming the second edge.

Specifically, the first skin and the second skin are not completely bonded together. A certain gap (i.e. a third length) needs to be reserved between the first edge and the second edge, and the third length may be 2 mm.

Taking the third length as a basis for trimming the second edge, comprising: if the second edge is not a flat edge or beyond the interface with the first edge, the second edge is trimmed along a third length from the first edge. In general, it is to ensure that the gap between the second edge of the second skin and the first edge of the first skin is a fixed third length.

The high temperature generated when cutting the second edge of the second skin oxidizes the galvanized periphery, and the galvanized weld is not affected during welding, so that the problem of air holes generated by the influence of the galvanized layer on the weld is solved.

As an alternative embodiment, a plurality of third welding spots obtained by welding are arranged between the first edge of the first skin and the second edge of the second skin, and the distance between each third welding spot is the second length.

Fig. 3 is a schematic view of a roof skin structure according to the present utility model, where the first skin, the second skin, and the vehicle body skeleton are welded together through welding points (i.e., third welding points) of the skeleton at ends of the two skin layers in the drawing.

After the first edge of the first skin and the second edge of the second skin are welded on the target position of the vehicle body framework respectively, dense welding is needed to be carried out on the edge connection position.

And (3) generating a plurality of third welding spots after intensive welding, wherein the distance between the third welding spots is a third distance, and the value range of the third distance is [40, 50] mm.

As an alternative embodiment, the second length is greater than the first length.

The spacing between the welding spots of the intensive welding is smaller than that of the positioning spot welding, so that the purpose of centralizing each third welding spot into one welding seam can be achieved.

As an alternative embodiment, the number of third pads is greater than the number of first pads or second pads.

Because the spacing of the third welding spots is smaller than the spacing of the first welding spots/the second welding spots, the number of the third welding spots is also larger than that of the first welding spots/the second welding spots, and the purpose of centralizing each third welding spot into one welding seam can be achieved only by enough third welding spots.

As an alternative embodiment, the third welding spot is obtained by performing intensive welding at the target position by carbon dioxide gas shielded welding.

The utility model provides a dense welding mode, which is to carry out dense welding through carbon dioxide gas shielded welding.

By way of example, the welding is intensively carried out by adopting carbon dioxide gas shielded welding, welding wires are required to be ensured to be in gaps reserved at the first edge of the first skin and the second edge of the second skin during welding, the welding wires do not swing left and right and move uniformly towards the directions of the reserved gaps according to the welding speed of 0.25cm/s during welding, a welding seam molten pool is enabled to be fused at two ends of the frame and the skins at the same time, the edges of the frame of the vehicle body and the two skins can be effectively welded together to form a welding seam, and the length of the welding seam is about 15-20 mm.

The first skin, the second skin and the car body framework are welded together, and a welding seam is generated through intensive welding, so that the problems that the welding spots are too scattered, are not concentrated and are uncontrollable are solved, and the car body framework is welded below the two skins, which is equivalent to adding a backing plate below the two skins, so that the two skins are not required to be welded together in a superimposed manner, and the problem that the skins are thinner and easy to weld through is solved.

The carbon dioxide gas shielded welding has the characteristics of open arc, no slag, good welding quality, high welding productivity, capability of performing all-position welding and the like, and the welding cost is lower than that of the consumable electrode arc welding.

Optionally, the method of the utility model is not particularly limited, and other welding methods can be adopted to perform the intensive welding.

The present utility model is directed to a roof skin structure comprising: the automobile body skeleton, first skin and second skin, the first border of first skin welds on the target position of automobile body skeleton, and the second border of second skin welds on the target position of automobile body skeleton to make first skin and second skin be connected in the target position department of automobile body skeleton. The edges of the two layers of skins are welded on the same position of the car body framework respectively, so that the problem that the skins are easy to weld through by spot welding after the two layers of skins are overlapped is avoided.

According to another aspect of the present utility model, there is also provided a method of welding a roof skin, including:

the first step: the first skin is pressed on the car body framework, and the first edge of the first skin is adjusted to be put on one half of the car body framework, as shown in fig. 4;

and a second step of: the required interval of the tack welds is about 200-250 mm, the length of each spot weld is about 5-10 mm, the spot weld interval is 250 mm in the figure, the length of the weld is 6.1 mm, and 16 mm in the figure is the length of the reserved gap and the vehicle body skeleton part of the coverage area of the second skin;

and a third step of: a gap of about 1 to 2 mm needs to be left in the middle of the butt joint of the first skin and the second skin, as shown in fig. 6;

fourth step: the welding pitch of the intensive welding is 40-50 mm, and the length of each weld joint is about 15-20 mm, as shown in fig. 7.

According to the roof skin structure, the problems that the skins are thinner and easy to weld through, air holes are easy to generate, the interlayer is difficult to resist corrosion and the like are solved by changing the linking structure of the two skins on the vehicle body framework and the welding position.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying importance; the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from, respectively, a particular component geometry.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct or indirect through an intermediate medium, or may be internal to two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

The foregoing is only illustrative of the present utility model and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present utility model.

Claims (10)

1. A roof skin structure, comprising: the automobile body skeleton, first skin and second skin, the first border of first skin welds in the target position of automobile body skeleton, the second border of second skin welds in the target position of automobile body skeleton to make first skin with the second skin is in the target position department of automobile body skeleton connects.

2. The roof skin structure of claim 1, wherein the first skin is fixed to the target location by spot welding after the first skin is fully attached to the body frame.

3. The roof skin structure of claim 2, wherein there are a plurality of first welds of uniform arrangement resulting from spot welding between the first edge of the first skin and the target location, a distance between each of the first welds being a first length.

4. The roof skin structure of claim 3, wherein the second skin is fixed to the target location by spot welding after being fully attached to the body frame.

5. The roof skin structure of claim 4, wherein a plurality of second welds of uniform arrangement resulting from spot welding exist between the second edge of the second skin and the target location, a distance between each of the second welds being the first length.

6. The roof skin structure of claim 5, wherein a plurality of third weld spots are present between the first edge of the first skin and the second edge of the second skin, each third weld spot being a distance of a second length.

7. The roof skin structure of claim 6, wherein a third length is spaced between the first edge and the second edge, the third length being used as a basis for trimming the second edge.

8. The roof skin structure of claim 6, wherein the number of third welds is greater than the number of first welds or the second welds.

9. The roof skin structure of claim 6, wherein the second length is greater than the first length.

10. The roof skin structure of claim 6, wherein the third weld is a densely welded weld at the target location by carbon dioxide gas shielded welding.