阅读说明：本技术 一种铝合金车身框架专用铸铝接头 (Special cast aluminum joint for aluminum alloy vehicle body frame ) 是由 王佳宁 陈鑫 赵康明 杨立飞 于 2019-12-25 设计创作，主要内容包括：本发明公开了一种铝合金车身框架专用铸铝接头,包括：第一连接部,其为柱状,所述第一连接部的一端沿轴向开设有第一连接凹槽；多个第二连接部,其为柱状,所述多个第二连接部围绕所述第一连接部的另一端设置,并且所述多个第二连接部的一端分别与所述第一连接部固定连接；其中,所述第二连接部的另一端沿轴向开设有第二连接凹槽,所述第二连接凹槽与所述第一连接凹槽连通；多个限位台阶,其分别固定设置在所述第一连接凹槽及所述第二连接凹槽内；其中,所述铸铝接头为一体成型结构。本发明提供的铝合金车身框架专用铸铝接头,能够实现铝合金型材不同角度、不同型材断面的有效连接,保证接头部位的整体刚度和强度,减少焊接长度,提高生产效率。(The invention discloses a special cast aluminum joint for an aluminum alloy vehicle body frame, which comprises: the first connecting part is columnar, and a first connecting groove is formed in one end of the first connecting part along the axial direction; the second connecting parts are columnar, are arranged around the other ends of the first connecting parts, and are fixedly connected with the first connecting parts at one ends respectively; the other end of the second connecting part is axially provided with a second connecting groove which is communicated with the first connecting groove; the limiting steps are respectively and fixedly arranged in the first connecting groove and the second connecting groove; wherein, cast aluminum connects for the integrated into one piece structure. The special cast aluminum joint for the aluminum alloy car body frame can realize effective connection of sections of different aluminum alloy sections at different angles, ensure the integral rigidity and strength of the joint part, reduce the welding length and improve the production efficiency.)

1. The utility model provides a special cast aluminum of aluminum alloy automobile body frame connects which characterized in that includes:

the first connecting part is columnar, and a first connecting groove is formed in one end of the first connecting part along the axial direction;

the second connecting parts are columnar, are arranged around the other ends of the first connecting parts, and are fixedly connected with the first connecting parts at one ends respectively;

the other end of the second connecting part is axially provided with a second connecting groove, and the second connecting groove is communicated with the first connecting groove;

the limiting steps are respectively and fixedly arranged in the first connecting groove and the second connecting groove;

wherein, cast aluminum connects for the integrated into one piece structure.

2. The aluminum alloy vehicle body frame dedicated cast aluminum joint according to claim 1, wherein a plurality of reinforcing ribs are fixedly connected between two adjacent connecting portions.

3. The aluminum alloy vehicle body frame dedicated cast aluminum joint according to claim 2, wherein the second connecting portion is two;

one of the second connecting portions is coaxially and fixedly connected with the first connecting portion, and a first included angle α is formed between the other second connecting portion and the first connecting portion;

and the first included angle α is in a range of 0 ° < α <180 °.

4. The cast aluminum joint special for the aluminum alloy vehicle body frame as claimed in claim 3, wherein the first included angle α is 90 °.

5. The aluminum alloy vehicle body frame dedicated cast aluminum joint according to claim 2, wherein the second connecting portion is two;

a second included angle β is formed between one of the second connecting portions and the first connecting portion, a third included angle θ is formed between the other one of the second connecting portions and the first connecting portion, and a fourth included angle δ is formed between the two second connecting portions;

the value range of the second included angle β is 0 degrees < β <180 degrees, the value range of the third included angle theta is 0 degrees < theta <180 degrees, and the value range of the fourth included angle delta is 0 degrees < delta <180 degrees.

6. The cast aluminum joint special for the aluminum alloy vehicle body frame according to claim 5, wherein β θ δ.

7. The cast aluminum joint special for the aluminum alloy vehicle body frame according to claim 6, wherein β is equal to θ and δ is equal to 90 °.

8. The aluminum alloy vehicle body frame special cast aluminum joint as claimed in claim 3 or 5, wherein the equation of the profile curve of the cross section of the first connecting groove and/or the second connecting groove with the vertex of the profile curve of the cross section of the connecting groove as an origin is as follows:

wherein d represents the maximum width of the profile curve and h represents the maximum height of the profile curve.

9. The aluminum alloy vehicle body frame special cast aluminum joint as claimed in claim 3 or 5, wherein the profile curve equation of the cross section of the first connecting groove and/or the second connecting groove is:

wherein, a₁、a₂、a₃… … is a rational number and is not 0; m is₁、m₂、m₃… … is a rational number and is not 0.

10. The special cast-aluminum joint for the aluminum alloy vehicle body frame as recited in claim 1 or 2, wherein the section of the cast-aluminum joint is connected with the aluminum alloy section through a MIG welding seam.

Technical Field

The invention belongs to the technical field of all-aluminum vehicle body frame connection, and particularly relates to a special cast aluminum joint for an aluminum alloy vehicle body frame.

Background

In recent years, problems such as energy crisis and environmental pollution need to be solved urgently, and in the aspect of automobile industry, lightweight design becomes a development trend and a hot spot. The lightweight design mainly comprises material lightweight, structure lightweight and processing technology lightweight. The material is mainly applied to light alloys such as aluminum magnesium alloy and the like in light weight. The structure lightweight design mainly realizes the integral weight reduction through the optimization of the structure on the premise of not sacrificing the performance. The process lightweight is to realize the processing and forming of new materials and new structures on the new processing technology. For this reason, it has been proposed to construct all-aluminum frame bodies from aluminum alloy profiles for motor vehicle bodies.

The all-aluminum frame type vehicle body structure adopts aluminum alloy extruded sections as parts, so that the universality of the material structure can be improved, and the problems of formability and the like caused by a stamping process are avoided. The effective joining of aluminum alloy profiles is the focus of current research. At present, the aluminum alloy section car body frame mainly takes welding as a main part, and the main problems comprise that: the position that needs the welding is longer, and the welding degree of difficulty is great to the section bar welding of different section shapes especially abnormal shape, and welding efficiency is lower to can't guarantee the intensity of welding position.

Disclosure of Invention

The invention aims to overcome the defect that the existing aluminum alloy section car body frame needs to be completely welded, and provides a special cast aluminum joint for the aluminum alloy car body frame, which can realize effective connection of different angles and sections of different sections of an aluminum alloy section, ensure the integral rigidity and strength of a joint part, reduce the welding length and improve the production efficiency.

The technical scheme provided by the invention is as follows:

a special cast aluminum joint for an aluminum alloy vehicle body frame comprises:

the first connecting part is columnar, and a first connecting groove is formed in one end of the first connecting part along the axial direction;

the second connecting parts are columnar, are arranged around the other ends of the first connecting parts, and are fixedly connected with the first connecting parts at one ends respectively;

the other end of the second connecting part is axially provided with a second connecting groove, and the second connecting groove is communicated with the first connecting groove;

the limiting steps are respectively and fixedly arranged in the first connecting groove and the second connecting groove;

wherein, cast aluminum connects for the integrated into one piece structure.

Preferably, a plurality of reinforcing ribs are fixedly connected between two adjacent connecting portions.

Preferably, there are two of the second connecting portions;

one of the second connecting portions is coaxially and fixedly connected with the first connecting portion, and a first included angle α is formed between the other second connecting portion and the first connecting portion;

and the first included angle α is in a range of 0 ° < α <180 °.

Preferably, the first included angle α is 90 °.

Preferably, there are two of the second connecting portions;

a second included angle β is formed between one of the second connecting portions and the first connecting portion, a third included angle θ is formed between the other one of the second connecting portions and the first connecting portion, and a fourth included angle δ is formed between the two second connecting portions;

the value range of the second included angle β is 0 degrees < β <180 degrees, the value range of the third included angle theta is 0 degrees < theta <180 degrees, and the value range of the fourth included angle delta is 0 degrees < delta <180 degrees.

Preferably, β ═ θ ═ δ.

Preferably, β ═ θ ═ δ ═ 90 °.

Preferably, with the vertex of the profile curve of the cross section of the connecting groove as the origin, the profile curve equation of the cross section of the first connecting groove and/or the second connecting groove is:

wherein d represents the maximum width of the profile curve and h represents the maximum height of the profile curve.

Preferably, the profile curve equation of the cross section of the first connection groove and/or the second connection groove is:

wherein, a₁、a₂、a₃… … is a rational number and is not 0; m is₁、m₂、m₃… … is a rational number and is not 0.

Preferably, the end surface of the cast aluminum joint is connected with the aluminum alloy profile through a MIG welding seam.

The invention has the beneficial effects that:

(1) the special cast aluminum joint for the aluminum alloy vehicle body frame can realize effective connection of aluminum alloy sections with different angles and different section sections, and reduces the vehicle body weight.

(2) The special cast aluminum joint for the aluminum alloy vehicle body frame provided by the invention has higher structural strength, and is beneficial to improving the rigidity of an integral welding structure and improving the integral bearing capacity.

(3) The special cast aluminum joint for the aluminum alloy vehicle body frame only needs to be welded at the joint of the section bar and the joint, so that the welding length can be effectively reduced, and the production efficiency is improved; and simultaneously, the defects and the reduction of mechanical property caused by excessive welding positions are avoided.

Drawings

FIG. 1 is a schematic structural diagram of the connection between a cast aluminum joint special for an aluminum alloy vehicle body frame and an aluminum alloy section bar.

Fig. 2 is a schematic structural view of a cast aluminum joint specifically for use in an aluminum alloy vehicle body frame according to embodiment 1 of the present invention.

Fig. 3 is a schematic general structural view of a cast aluminum joint specifically for use in an aluminum alloy vehicle body frame according to embodiment 2 of the present invention.

Fig. 4 is a schematic side view of a cast aluminum joint for an aluminum alloy vehicle body frame according to embodiment 2 of the present invention.

Fig. 5 is a schematic structural view of a cast aluminum joint specifically for use in an aluminum alloy vehicle body frame in embodiment 3 of the present invention.

Fig. 6 is a schematic structural view of a cast aluminum joint specifically for use in an aluminum alloy vehicle body frame according to embodiment 4 of the present invention.

Fig. 7 is a schematic structural view of a cast aluminum joint specifically for use in an aluminum alloy vehicle body frame according to embodiment 5 of the present invention.

FIG. 8 is a schematic view showing the shape of a connecting groove in example 5 of the present invention.

Fig. 9 is a schematic structural view of a cast aluminum joint specifically for use in an aluminum alloy vehicle body frame according to embodiment 6 of the present invention.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

As shown in fig. 1 to 9, the present invention provides a cast aluminum joint specifically for an aluminum alloy vehicle body frame, which includes: the first connecting portion 110, the plurality of second connecting portions 120, and the plurality of limiting steps 130. The first connecting portion 110 is cylindrical, and a first connecting groove 111 is axially formed at one end of the first connecting portion 110. The second connection portions 120 are columnar, the plurality of second connection portions 120 are disposed around the other end of the first connection portion 120, and one ends of the plurality of second connection portions 120 are respectively fixedly connected to different side surfaces or end surfaces of the first connection portion 111. The other end of the second connecting portion 120 is axially opened with a second connecting groove 121, and the second connecting groove 121 is communicated with the first connecting groove 111. The plurality of limiting steps 130 are respectively and fixedly arranged in the first connecting groove 111 and the second connecting groove 121, and are used for limiting the position of the section of the aluminum alloy material when the aluminum alloy profile is connected, so that the stability of the connection of the aluminum alloy profile with the first connecting part 110 and the second connecting part 120 is ensured. Wherein, the cast aluminum joint is of an integrated structure.

Preferably, the cross-sectional shape (section) of the first connection groove 111 is the same as the outer contour shape of the first connection portion 110, and is different only in size (due to the thickness of the sidewall of the first connection portion 110), that is, the thickness of the sidewall is the same at different positions at the same section of the first connection portion 110. The cross-sectional shape (section) of the second connecting groove 121 is the same as the outer contour shape of the second connecting portion 120, and only has a different size (due to the thickness of the sidewall of the second connecting portion 120), that is, the thicknesses of the sidewall at different positions at the same section of the second connecting portion 120 are the same. And the sidewall thicknesses of the first and second connection parts 110 and 120 are the same. Therefore, the consistency of the strength and the rigidity of different parts of the cast aluminum joint can be ensured, and the cast aluminum joint can not be locally collapsed when being impacted.

When the cast aluminum joint is connected with the aluminum alloy sections, the first aluminum alloy section 101, the second aluminum alloy section 102 and the third aluminum alloy section 103 with the same or different section shapes can be respectively inserted into the first connecting groove 111 and the plurality of second connecting grooves 121, clearance fit is formed between the aluminum alloy sections and the side walls of the corresponding first connecting part or second connecting part, the end parts of the aluminum alloy sections are abutted against the limiting step 130, and then the end parts of the first connecting part 110 and the second connecting part 120 are welded with the surface of the corresponding aluminum alloy sections by adopting a welding method of Metal Inert Gas (MIG) welding; the welding mode is angle joint; the welding sequence is a continuous annular weld, the weld is a circumferential fillet weld, and the height of the weld 140 is at least 5 mm.

As a further preference, a plurality of reinforcing ribs 150 are fixedly connected between the adjacent first connecting portion 110 and the second connecting portion 120, or between two adjacent second connecting portions 120, so as to further improve the strength and rigidity of the cast aluminum joint.

The present invention will be further described with reference to specific embodiments.