CN220679743U - Welded structure and car - Google Patents

Abstract

The utility model relates to a welding structure and an automobile, comprising a first welding piece, a second welding piece and a welding structure, wherein the first welding piece is provided with a first welding surface, and annular protrusions are formed on the first welding surface; and the second welding piece is provided with a second welding surface, the second welding surface is opposite to the first welding surface, and the second welding surface is welded with the annular bulge to form an annular welding core. The annular bulge reduces the contact area with the second welding surface, thereby the contact resistance during welding can be increased, according to ohm's law, larger contact resistance is favorable to producing larger welding heat, thereby being favorable to producing welding core, on this basis, even if the welding pressure applied during welding thin plate and tubular part is smaller, the contact of two parts can be ensured to be good, and the cold joint is avoided when the thin plate and thick plate with large plate thickness ratio exist during welding, the welding quality is improved, in addition, the problems that the self resistivity is small and the surface oxidation layer exists during welding of aluminum alloy parts can be overcome, the welding difficulty is greatly reduced, and the machinability is improved.

Description

Welded structure and car

Technical Field

The utility model relates to the technical field of automobile manufacturing, in particular to a welding structure and an automobile.

Background

At present, in the manufacturing process of automobiles, particularly new energy automobiles, a large number of welding processes are involved, so that the number of parts can be greatly reduced, the structural strength of automobile bodies can be improved, and the safety and reliability of the automobiles can be improved.

However, when welding a thin plate and a tubular part, poor contact between the two parts is easily caused due to the need to apply a small welding pressure; in addition, when welding a thin plate and a thick plate with a large plate thickness ratio, a virtual welding condition often occurs due to a large welding area; particularly, when two parts made of aluminum alloy are welded, the welding processing difficulty is high due to the fact that the resistivity of the aluminum alloy is small and a surface oxide layer exists.

Disclosure of Invention

Based on this, it is necessary to provide a welded structure and car, aims at solving the problem that prior art welding quality is poor, and the welding processing degree of difficulty is big.

In one aspect, the present application provides a welded structure comprising:

the welding device comprises a first welding piece, a second welding piece and a first welding piece, wherein the first welding piece is provided with a first welding surface, and annular protrusions are formed on the first welding surface; the method comprises the steps of,

the second welding piece is provided with a second welding surface, the second welding surface is opposite to the first welding surface, and the second welding surface is welded with the annular bulge to form an annular welding core.

The welding structure of the scheme comprises the first welding part and the second welding part which are welded with each other to form a whole, and because the annular bulge is formed on the first welding surface, after the first welding surface and the second welding surface are welded relatively, the annular bulge can be melted with the second welding surface to form an annular welding core, compared with the traditional welding mode, the annular bulge reduces the contact area with the second welding surface, thereby increasing the contact resistance during welding, being beneficial to generating larger welding heat according to ohm law, being beneficial to generating the welding core, on the basis, even though the applied welding pressure is smaller during welding of the thin plate and the tubular part, the contact of the two parts is good due to the enough welding heat, and the generation of a virtual welding problem is avoided during welding of the thin plate and the thick plate with a large plate thickness ratio, so that the welding processing quality is improved.

The technical scheme of the application is further described below:

in one embodiment, the first welding piece further has a welding surface opposite to the first welding surface, an annular groove is formed on the welding surface, the annular groove is arranged corresponding to the annular protrusion, and the welding electrode acts on the annular groove during welding.

In one embodiment, the annular groove and the annular protrusion are integrally formed by a stamping process.

In one embodiment, the diameter of the annular protrusion and/or the annular groove is set to D1, and the diameter of the end face of the welding electrode is set to D2; wherein d1=d2-6 mm.

In one embodiment, the annular protrusion is provided in a fully closed annular configuration; alternatively, the annular protrusion is provided in a semi-closed annular structure.

In one embodiment, the annular protrusions are arranged in at least two ways, and the at least two annular protrusions are arranged concentrically or eccentrically in a nested manner.

In one embodiment, the number of annular protrusions in a nested arrangement is set to not more than three, and the diameter of one annular protrusion at the outermost ring is 5mm to 8mm.

In one embodiment, the height of the annular protrusion on the first welding surface is 0.4 mm-0.7 mm, and the single-side width of the annular protrusion is 0.5 mm-1 mm.

In one embodiment, the annular protrusion is provided in a regular shape or an irregular shape such as a circle, a square, a triangle, an ellipse, a trapezoid, etc.

In another aspect, the present application also provides an automobile comprising the welded structure as described above.

Drawings

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

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a processing block diagram of a welded structure according to an embodiment of the present application;

FIG. 2 is a schematic view of an elliptical annular protrusion of a fully enclosed configuration;

FIG. 3 is a schematic view of an elliptical annular protrusion of a semi-enclosed structure;

FIG. 4 is a schematic view of a square annular protrusion of a fully enclosed structure;

FIG. 5 is a schematic view of a square annular protrusion of a semi-enclosed structure;

FIG. 6 is a schematic view of a triangular annular protrusion of a fully enclosed configuration;

FIG. 7 is a schematic view of a triangular annular protrusion of a semi-enclosed structure;

FIG. 8 is a schematic view of a double-layer nested annular protrusion of a fully enclosed configuration;

FIG. 9 is a schematic view of a double nested annular protrusion of a semi-enclosed structure.

Reference numerals illustrate:

10. a first weldment; 11. a first welding surface; 12. an annular protrusion; 13. a welding surface is applied; 14. an annular groove; 20. a second weldment; 21. a second welding surface; 30. and welding the electrode.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

Fig. 1 shows a welding structure according to an embodiment of the present application, which is used for a forming structure of two parts processed by welding. The specifically adopted welding process method is any one of spot welding, arc welding and the like. For example, spot welding methods are used in this application.

Illustratively, the weld structure includes a first weld 10 and a second weld 20. The first welding member 10 has a first welding surface 11, and an annular projection 12 is formed on the first welding surface 11; the second welding member 20 has a second welding surface 21, the second welding surface 21 is opposite to the first welding surface 11, and the second welding surface 21 is welded with the annular projection 12 to form an annular nugget.

It is understood that the first welding member 10 and the second welding member 20 may have any one of a flat plate shape, a tubular shape, a spherical shape, and the like, and the structural shapes of the first welding member 10 and the second welding member 20 may be the same or different.

In summary, implementing the technical scheme of the embodiment has the following beneficial effects: the welding structure of the above scheme includes the first welding part 10 and the second welding part 20 that are welded to each other and become an organic whole, because be formed with annular protruding 12 on the first welding surface 11, consequently, after first welding surface 11 and second welding surface 21 are relative welding processing, annular protruding 12 can melt with second welding surface 21 and form annular welding core, compared with traditional welding mode, annular protruding 12 has reduced the area of contact with second welding surface 21, thereby can increase the contact resistance when welding, according to ohm's law, bigger contact resistance is favorable to producing bigger welding heat, thereby be favorable to the production of welding core, even though the welding pressure that applys when welding sheet metal and tubular part is less on this basis, but because the welding heat is big enough, also can guarantee that two parts contact well, and avoid the rosin joint problem to produce when welding there is sheet and thick plate of big plate ratio, improve the welding processing quality, in addition, also can overcome the aluminium alloy part and because self resistivity is little and there is the surface oxidation layer when welding processing degree of difficulty, make the welding processing greatly reduced, improve the workability.

With continued reference to fig. 1, the first welding member 10 further has a welding surface 13 opposite to the first welding surface 11, and an annular groove 14 is formed on the welding surface 13, the annular groove 14 is disposed corresponding to the annular protrusion 12, and the welding electrode 30 acts on the annular groove 14 during welding.

The welding electrode 30 acts on the annular groove 14, so that the generated high temperature can uniformly act on the whole annular bulge 12, and the material (such as metal) at the contact part of the annular bulge 12 and the second welding surface 21 is melted, so that the annular welding core with a regular structure is better formed, and the welding quality is ensured; and since the welding electrode 30 does not directly contact the annular projection 12 and the second welding surface 21, it does not affect the contact resistance, facilitating enhancement of the welding workability.

In some embodiments, the annular recess 14 is integrally formed with the annular projection 12 using a stamping process. That is, before the welding process, the welding surface 13 of the first welding member 10 is used as a stamping surface, after the stamping process by adopting the annular stamping head, the concave annular groove 14 is formed on the welding surface 13, and the protruding annular protrusion 12 is formed on the first welding surface 11, so that the annular groove 14 and the annular protrusion 12 are ensured to be formed simultaneously, the processing procedures are reduced, the workability is improved, the stamping process difficulty is small, and the practicability is strong.

In still other embodiments, the diameter of the annular protrusion 12 and/or the annular recess 14 is set to D1, and the diameter of the end face of the welding electrode 30 is set to D2; wherein d1=d2-6 mm. In other words, the diameter of the end face of the welding electrode 30 is 6mm larger than the diameter of the annular protrusion 12 and/or the annular groove 14, and the welding pressure requirement is low because the welding energy output is higher by adopting the welding electrode 30 with larger diameter, which is helpful for generating larger welding heat, so that the surface quality of the annular welding core is further ensured to be attractive while the welding quality is ensured.

With continued reference to fig. 2 to 7, further, according to actual processing requirements, the annular protrusion 12 is configured as a fully-closed annular structure; alternatively, the annular projection 12 is provided in a semi-closed annular configuration. The annular bulge 12 with the full-closed annular structure is adopted, so that a complete annular weld core can be formed after welding, the connecting area is relatively larger, and the connecting strength of the first welding piece 10 and the second welding piece 20 is higher. The annular protrusion 12 with a semi-closed annular structure further reduces the contact area with the second welding surface 21, so that the contact resistance is larger, and larger welding heat is generated during welding, which is more beneficial to generating welding cores.

Alternatively, when the annular projection 12 is a semi-closed annular structure, it may include one break-off slit or may include a plurality of break-off slits. When a plurality of break-off slits are employed, the plurality of break-off slits are uniformly spaced apart along the annular extension direction of the annular projection 12.

With continued reference to fig. 8 and 9, in addition to any of the above embodiments, the annular protrusions 12 are provided in at least two, at least two annular protrusions 12 being arranged concentrically or eccentrically nested inside and outside. Compared with a single annular protrusion 12, at least two annular protrusions 12 which are arranged in a nested manner inside and outside are connected with the second welding surface 21 at the same time, and at least two annular welding cores can be formed at the same time, so that the welding length is increased by times, and the welding strength is greatly improved. Whether concentric or eccentric, the multi-turn annular projection 12 has a greater structural configuration in consideration of machining dimensional errors or to meet different machining requirements.

Further, the number of the annular projections 12 in the nested arrangement is set to not more than three turns, and the diameter of one annular projection 12 at the outermost ring is 5mm to 8mm. Controlling the number of turns of the annular protrusion 12 is equivalent to controlling the number of times the welding electrode 30 is processed at the annular groove 14, contributing to an improvement in processing efficiency.

The protrusion height of the annular protrusion 12 on the first welding surface 11 is 0.4mm to 0.7mm, and the single-side width of the annular protrusion 12 is 0.5mm to 1mm. The annular protrusion 12 is thus of sufficient height and width to help ensure that an annular weld nugget of uniform structure and thickness is formed between the hot-melted annular protrusion 12 and the second weld face 21.

With continued reference to fig. 2 to 7, the annular protrusion 12 is provided in a regular shape or an irregular shape such as a circle, a square, a triangle, an ellipse, a trapezoid, etc., according to actual needs.

In addition, the present application also provides an automobile comprising the welded structure according to any one of the embodiments above.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore 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 a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Claims (10)

1. A welded structure, comprising:

the welding device comprises a first welding piece, a second welding piece and a first welding piece, wherein the first welding piece is provided with a first welding surface, and annular protrusions are formed on the first welding surface; the method comprises the steps of,

a second weld having a second weld face opposite the first weld face, the second weld face being welded to the annular projection to form an annular weld nugget;

the annular protrusions are arranged in at least two ways, and the at least two annular protrusions are arranged concentrically or eccentrically in an inner-outer nested way.

2. The welding structure according to claim 1, wherein the first welding member further has a welding surface provided opposite to the first welding surface, an annular groove is formed in the welding surface, the annular groove is provided in correspondence with the annular projection, and a welding electrode is applied to the annular groove during welding.

3. The welded structure according to claim 2, wherein the annular groove and the annular protrusion are integrally formed by a stamping process.

4. The welding structure according to claim 2, wherein a diameter of the annular projection and/or the annular groove is set to D1, and a diameter of an end face of the welding electrode is set to D2; wherein d1=d2-6 mm.

5. The welded structure according to claim 1, wherein the annular projection is provided in a totally-enclosed annular structure.

6. The welded structure according to claim 1, wherein the annular projection is provided in a semi-closed annular structure.

7. The welded structure according to claim 1, wherein the number of the annular projections in the nested arrangement is set to not more than three turns, and the diameter of one of the annular projections at the outermost turn is 5mm to 8mm.

8. The welding structure according to any one of claims 1 to 7, wherein a projection height of the annular projection from the first welding surface is 0.4mm to 0.7mm, and a single-side width of the annular projection is 0.5mm to 1mm.

9. The welded structure according to any one of claims 1 to 7, wherein the annular projection is provided in a regular shape or an irregular shape of a circle, a square, a triangle, an ellipse, a trapezoid.

10. An automobile comprising a welded structure according to any one of the preceding claims 1 to 9.