CN214684861U - Welding strength self-compensating section bar structure - Google Patents

Abstract

The utility model discloses a welding strength self compensating section bar structure, section bar structure are close to welding center one end and include welded joint district and welding heat affected zone, and the welded joint district is provided with the groove, and welding heat affected zone is provided with the protruding portion that is used for intensity self compensating. Through setting up the protruding portion that is used for intensity self-compensation in welding heat affected zone for the section bar has intensity compensation in welding heat affected zone after the welding, guarantees that whole section bar structure has sufficient intensity after the welding, and other not influenced positions can not increase the material simultaneously, thereby avoids increasing weight and cost.

Description

Welding strength self-compensating section bar structure

Technical Field

The utility model relates to a section bar technical field especially relates to a welding strength self compensating section bar structure.

Background

Welding manufacturability is considered for the profile structure for aluminum alloy welding, such as friction stir welding to increase welding support. After a conventional welded profile structure (in a heat treatment strengthening state) is welded, the strength loss of a welded joint area and a heat affected area is faced, so that the welded area becomes a stress dangerous area of the whole structure, and on the contrary, the strength is excessive at other positions, so that the material waste and the structure weight are increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a welding strength self compensating section bar structure to solve the problem that above-mentioned prior art exists, through setting up the protruding portion that is used for intensity self compensating at welding heat affected area, make the section bar after the welding, have intensity compensation at welding heat affected area, guarantee that whole section bar structure has sufficient intensity after the welding, other not influenced positions can not increase the material simultaneously, thereby avoid increasing weight and cost.

In order to achieve the above object, the utility model provides a following scheme: the utility model provides a welding strength self compensating section bar structure, section bar structure are close to welding center one end and include the welded joint district and weld heat affected zone, the welded joint district is provided with the groove, the weld heat affected zone is provided with the protruding portion that is used for intensity self compensating.

Preferably, the distance L from one end of the protruding part far away from the welding center to the welding center₀Is 3T₀～4T₀When single pass welding is used, T₀T is a value excluding the height of the projection when multi-pass welding is performed in a plurality of layers₀Is a single layer weld thickness value.

Preferably, the height of the protrusion is T₁，T₁And T₀The relationship of (1) is: t is₁＝0.2T₀。

Preferably, L₀Increases with increasing bevel angle θ.

Preferably, θ is 60 °, T₀Is 4mm, T₁Is 0.8mm, L₀Is 14 mm.

Preferably, the distance L from one end of the protruding part close to the welding center₁Is T₀～1.5T₀。

Preferably, T₀Is 4mm, L₁Is 5 mm.

Preferably, the material of the profile structure is heat treatment strengthened aluminum alloy.

The utility model discloses for prior art gain following technological effect:

1. through setting up the protruding portion that is used for intensity self-compensation in welding heat affected zone for the section bar has intensity compensation in welding heat affected zone after the welding, guarantees that whole section bar structure has sufficient intensity after the welding, and other not influenced positions can not increase the material simultaneously, thereby avoids increasing weight and cost.

2. By setting the height T of the projection₁Is set to 0.2T₀In such a manner that sufficient strength compensation of the projection is ensured while material waste is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a first schematic view of a profile structure;

FIG. 2 is a second schematic view of the profile structure;

wherein, 1, welding a joint area; 2. welding the heat affected zone; 3. beveling; 4. a protrusion; 5. And welding the center.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model aims at providing a welding strength self compensating section bar structure to solve the problem that prior art exists, through set up the protruding portion that is used for intensity self compensating in welding heat affected area, make the section bar after the welding, have intensity compensation in welding heat affected area, guarantee that whole section bar structure has sufficient intensity after the welding, other not influenced positions can not increase the material simultaneously, thereby avoid increasing weight and cost.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

Example one

As shown in fig. 1, the present embodiment provides a welding strength self-compensating profile structure, wherein one end of the profile structure close to a welding center 5 includes a welding joint region 1 and a welding heat affected zone 2, where the welding center 5 is a central position of a welding seam formed when two profile structures are butt-jointed for welding, when no gap is left between the two profile structures, the welding center 5 is located at an end surface position of the welding joint region 1 of the profile structure, and when a welding gap is left between the two profile structures, the welding center 5 is located at a center of the welding gap; the welding joint area 1 is provided with a groove 3, wherein the shape of the groove 3 can be any existing groove shape such as V-shaped, Y-shaped, U-shaped and the like, meanwhile, the groove 3 can also adopt a form with a truncated edge or without a truncated edge, the form of the groove 3 can be selected according to the actually selected welding process, and the limitation is not taken as the limit of the utility model; the welding heat affected zone 2 is provided with a protruding part 4 for strength self-compensation, the protruding part 4 can extend to the groove 3 of the welding joint zone 1, as shown in fig. 2, or can be only arranged at the welding heat affected zone 2, so that a step is formed at the joint of the welding heat affected zone 2 and the welding joint zone 1, as shown in fig. 1, in the embodiment, a structural form that the protruding part 4 extends to the groove 3 of the welding joint zone 1 is adopted, and after welding, in order to ensure that the surface of the welding part is smooth, the welding position needs to be removed with extra height; the size such as thick, the cross-section width of section bar structure can set up according to actual need, but no matter any dimension, need set up protruding portion 4 at welding heat affected zone 2 position to make the section bar structure after the welding, have intensity compensation at welding heat affected zone 2, guarantee that whole section bar structure has sufficient intensity after the welding, other not influenced positions can not increase the material simultaneously, thereby avoid increasing weight and cost.

In this embodiment, the material of the profile structure is preferably heat-treated strengthened aluminum alloy material, such as 6005A, 6061, 6063, and 7075, and the heat treatment is T5 or T6, and the forming manner is extrusion forming; certainly, other base materials with heat treatment enhancement property can be selected, materials with reduced strength of a heat affected zone after welding, such as silicon carbide particle reinforced aluminum matrix composite, dispersion strengthened aluminum alloy and other metal materials or composite materials, and meanwhile, the materials are formed by selecting corresponding processes convenient for forming, such as extrusion, rolling, cold drawing, forging and pressing, and the listed materials and forming modes do not limit the utility model; the molding mode is preferably a non-material-reducing processing molding mode, and the non-material-reducing processing molding mode is adopted, so that the material cost is reduced while the increase of materials of other unaffected parts is avoided and the weight is reduced, and the molding method is more economical.

As a preferred embodiment, the distance L from the welding center 5 is that of one end of the projection 4 away from the welding center 5₀Is 3T₀～4T₀When single pass welding is used, T₀For a value of the sheet thickness excluding the height of the projection 4, T is, as shown in FIG. 1, when multi-pass welding of a plurality of layers is employed₀Is a single layer weld thickness value, not shown in the figure; and the end of the projection 4 near the weld center 5 may extend to the location of the bevel 3 or only to the location where the weld joint zone 1 and the weld heat affected zone 2 meet.

Further, in order to ensure sufficient strength compensation of the projection 4 while avoiding waste of material, the height of the projection 4 is set to T₁，T₁And T₀The relationship of (1) is: t is₁＝0.2T₀。

Further, L₀The value of (A) increases with the increase of the angle theta of the groove 3, namely when theta is smaller, L is larger₀Is close to 3T₀When theta takes a large value, L₀Is close to 4T₀Thereby ensuring enough welding strength while ensuring that redundant materials are not increased.

L₀The values of (a) can also be referred to the heat input in the welding process parameters, and in the welding process parameters established in advance,if the heat input is too large, L₀Is close to 4T₀If the heat input is small, L₀Is close to 3T₀。

In this embodiment, L₀、T₁Is equal to T₀Is correlated with the value of T₀The value range of (A) is determined according to the actual requirement on the plate thickness and the selection of a welding process, for example, when a 3mm, 4mm or 5mm thick section structure is required to be welded and a single-pass welding mode is adopted, T is adopted₀3mm, 4mm and 5mm respectively; if the 8mm, 12mm and 15mm thick section structures are selected for welding and a multi-layer and multi-pass welding mode is selected, if the single-pass welding thickness value selected for the 8mm section structure is 4mm, the T is determined₀Is 4mm, if the single-pass welding thickness value selected by the 12mm section bar structure is 4mm or 6mm, T is₀Corresponding to 4mm or 6mm, if the single-pass welding thickness value selected by the 15mm section bar structure is 3mm or 5mm, then T₀Corresponding to 3mm or 5 mm; the thicknesses of the profile structures listed above are all values of thickness not including the height of the projection 4, and the above numerical values are listed for T₀Are illustrative and do not constitute a limitation of the present invention; the angle theta of the groove 3 is preferably in the range of 45-75 degrees, and other values can be selected according to the actual welding process.

In one embodiment, θ is 60 °, T₀Is 4mm, T₁Is 0.8mm, L₀Is 14 mm; adopt single pass to weld the mode, the thickness value that section bar structure does not include the height of protruding portion 4mm is 4mm, carry out the intensity contrast after the section bar structure welding of adopting above-mentioned structural style is welded with the section bar structure welding of conventional 4mm thick board, the material chooses for use 10% SiC granule reinforcing 6005A aluminium base combined material and ordinary 6005A material to contrast respectively, obtain through the experiment, when choosing for use above-mentioned two kinds of materials, adopt the structural style of this embodiment than adopting the structure of conventional 4mm thick board after the welding, overall structure's bearing capacity promotes about 20%.

Example two

As shown in fig. 2, the present embodiment provides a welding strength self-compensating profile structure, and on the basis of the first embodiment, the welding strength self-compensating profile structure of the present embodiment further has the following features:

one end of the projection 4 close to the welding center 5 only extends to the position where the welding joint area 1 and the welding heat affected area 2 are connected, namely a step is formed at the position where the welding joint area 1 and the welding heat affected area 2 are connected, as shown in figure 2, after the two profile structures are opposite, a groove capable of containing welding molten materials is formed at the step, wherein the distance L between one end of the projection 4 close to the welding center 5 and the welding center 5₁Is T₀～1.5T₀(ii) a During welding, the groove part is filled with the molten material, after welding is completed, the surplus height does not need to be removed, the structural form is adopted, welding seam deposition amount is reduced, and meanwhile, the weight of the profile structure and the amount of used materials are further reduced, so that the cost is further reduced.

In a preferred embodiment, a single pass welding process, T₀Is 4mm, L₁Is 5 mm.

It should be noted that, as is obvious to a person skilled in the art, the invention is not limited to details of the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (7)

1. The utility model provides a welding strength self compensating section bar structure which characterized in that: one end, close to a welding center, of the profile structure comprises a welding joint area and a welding heat affected area, wherein the welding joint area is provided with a groove, and the welding heat affected area is provided with a protruding part for strength self-compensation; the distance L from one end of the protruding part far away from the welding center to the welding center₀Is 3T₀～4T₀When is coming into contact withIn the case of single pass welding, T₀T is a value excluding the height of the projection when multi-pass welding is performed in a plurality of layers₀Is a single layer weld thickness value.

2. The welding strength self-compensating profile structure according to claim 1, wherein: the height of the protruding part is T₁，T₁And T₀The relationship of (1) is: t is₁＝0.2T₀。

3. The welding strength self-compensating profile structure according to claim 2, wherein: l is₀Increases with increasing bevel angle θ.

4. The welding strength self-compensating profile structure according to claim 3, wherein: theta is 60 DEG, T₀Is 4mm, T₁Is 0.8mm, L₀Is 14 mm.

5. A welding strength self-compensating profile structure according to any one of claims 2 to 4, wherein: the distance L from one end of the protruding part close to the welding center₁Is T₀～1.5T₀。

6. The welding strength self-compensating profile structure according to claim 5, wherein: t is₀Is 4mm, L₁Is 5 mm.

7. The welding strength self-compensating profile structure according to claim 1, wherein: the material of the section structure is heat treatment strengthening aluminum alloy.

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