CN218777590U

CN218777590U - Improved aluminum alloy auxiliary frame

Info

Publication number: CN218777590U
Application number: CN202222883262.XU
Authority: CN
Inventors: 陶锡晨; 吕俊泽; 孟勇; 陈小连; 张超; 张念光; 党斌; 范米谦
Original assignee: CITIC Dicastal Co Ltd
Current assignee: CITIC Dicastal Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-03-31
Anticipated expiration: 2032-10-31

Abstract

The utility model discloses an aluminum alloy auxiliary frame, a groove structure at two ends of a rectangular section, R10-R25 fillets at the corner positions around are arranged, which is beneficial to welding operation and improves the quality of welding seams; the positioning boss is arranged in the profile, the positioning boss is machined to form a groove with a specific size, and the left casting and the right casting inserted into the profile are matched with the groove to position the profile, so that the self-positioning mode can ensure that the size of a welded product meets the functional requirement, reduce a product external positioning device and reduce the production cost; the step type structure is arranged at the position of the weld crater of the casting, and the structure can ensure the strength and the welding quality of the weld joint on one hand, and has the light weight effect because the step position has even thickness and is 0.8 to 1.5 times of the thickness of the casting wall on the other hand.

Description

Improved aluminum alloy auxiliary frame

Technical Field

The utility model belongs to the automobile parts field, concretely relates to aluminum alloy sub vehicle frame.

Background

The sub vehicle frame is the key spare part of vehicle chassis suspension system, and spare part on the suspension can be integrated earlier on the sub vehicle frame with the automobile body coupling again like control arm, stabilizer bar etc. promotes assembly efficiency. The auxiliary frame has the functions of vibration isolation and noise reduction, so that the vibration and noise transmitted from the wheel edge to the carriage can be effectively reduced, and the driving comfort is improved.

The aluminum alloy auxiliary frame can be mainly divided into integral casting, full-profile tailor welding, profile cast hybrid welding and the like according to process division, wherein the profile cast hybrid welding scheme integrates the advantages of integral casting and profile tailor welding, and has the characteristics of low casting difficulty, small number of welding lines, low welding difficulty and the like.

The welding mode of type cast hybrid aluminum alloy sub vehicle frame is various, can the foundry goods insert the welding in the section bar, also can the section bar insert the welding in the foundry goods, can totally enclosed welding also can half open type welding, and each aspect such as service function, manufacturing cost, product security need be considered to specific welding form. The welding seam type classification is generally divided into butt welding seams, fillet welding seams and the like, wherein the butt welding seams are applied more in the welding of sectional materials and castings, the bottom locking butt welding seams are further optimized on the basis of the butt welding seams, the aluminum materials with the bottoms at the bottoms of the welding seams can effectively prevent the aluminum liquid from flowing to cause root penetration, and the welding quality and the product safety are greatly improved.

Disclosure of Invention

The utility model provides a modified aluminum alloy sub vehicle frame, welding scheme and welding groove including section bar and foundry goods, the utility model discloses effectively promote welding production efficiency, promote welding process yield, can satisfy the welding seam intensity and set up the requirement, possess the lightweight advantage again.

The utility model discloses a realize through following technical scheme: the improved aluminum alloy auxiliary frame comprises a left casting and a right casting which are respectively inserted into two ends of a section, the section completely wraps a protruding interface of the casting, and a welding mode of metal inert gas shielded welding is adopted to realize full-circle full welding.

Furthermore, welding grooves are arranged at two ends of the section, the angle of each groove is 30-60 degrees, and the thickness of the thinnest position of each groove of the section is 0-3 mm;

furthermore, the radius of four corners of the rectangular section is between R10 and R25, a positioning boss is arranged on the inner side of the section, and the height of the boss is 1-5 mm;

further, a positioning boss is machined on the inner side of the section bar to obtain a groove matched with the casting, and the length of the groove is 8-15 mm consistent with the insertion depth of the casting;

further, the position of a cast weld joint is molded in a machining mode, a step structure is arranged, the depth of the outer side surface of the step is 1-3 mm lower than the surface of the cast, the outer side surface of the step is flush with the profile, the inner side surface of the step is inserted into the profile, and the thickness of the integral step is 0.8-1.5 times of the thickness of the cast wall;

furthermore, in order to enhance the strength performance of the welding spots, a reinforced step structure is arranged, the outer side surface of the step is 1-5 mm higher than the casting body, and the thickness of the step at the outer side is 1.2-2 times of the casting wall thickness.

Compared with the prior art, the utility model has the advantages as follows: the groove structures at two ends of the rectangular section are provided with R10-R25 round corners at the corners around, so that the welding operation is facilitated, and the quality of a welding seam is improved; the positioning boss is arranged in the profile, the positioning boss is machined to form a groove with a specific size, and a left casting and a right casting inserted into the profile are matched with the groove to position the profile; the step type structure is arranged at the position of the weld crater of the casting, the structure can ensure the strength and the welding quality of the weld joint on one hand, and on the other hand, the step position has even thickness which is 0.8 to 1.5 times of the thickness of the wall of the casting, so the step type structure has the light weight effect.

The reinforced step-shaped structure is arranged at the position with larger stress of the product, the stress value at the welding interface can be effectively reduced by the way that the height of the outer side surface of the step is increased to be 1-5 mm higher than the casting body, and the thickness is increased to be 1.2-2 times of the wall thickness of the casting, so that the strength performance requirement of the product is met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is the utility model discloses an aluminum alloy sub vehicle frame welding position schematic diagram.

Fig. 2 is the utility model discloses an aluminum alloy sub vehicle frame welding position elevation.

Fig. 3 is the utility model discloses an aluminum alloy sub vehicle frame section bar cross-sectional view.

Figure 4 is the utility model discloses an aluminum alloy sub vehicle frame crater cross-sectional view.

In the figure: left side foundry goods 1, section bar 2, right side foundry goods 3, location boss 4, strenghthened type step lateral surface 5, step lateral surface 6, step medial surface 7, section bar groove 8, section bar inboard groove 9, section bar corner position radius R, section bar wall thickness T1, location boss height H1, casting wall thickness T2, strenghthened type step lateral surface height H2, strenghthened type step lateral surface thickness T3, step lateral surface height H3, the whole thickness T4 of step, section bar groove minimum end thickness T5, the recess length L of the inboard location boss of section bar.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings: as shown in fig. 1 and 2, the left casting 1 is inserted into the left end of the section bar 3, the right casting 2 is inserted into the right end of the section bar 3, the section bar 3 completely wraps the protruding interfaces of the left casting 1 and the right casting 3, and the welding mode of the metal inert gas arc welding is adopted to perform full-circle full welding on the welding seams on the left side and the right side of the section bar 3. When in welding, the arc starting and closing position is prevented from being arranged in a fillet area as much as possible.

Further, as shown in fig. 4, welding grooves 8 are formed at the left end and the right end of the section bar 3, the angle of each groove 8 is 30-60 degrees, and the thickness T5 of the thinnest position of each groove is 0-3 mm; the end of the section bar is provided with the groove, so that the welding electric arc can penetrate into the bottom of the section bar, and the welding quality is improved.

Further, as shown in fig. 3, the radius R of four corners of the rectangular section is R10 to R25, the inner side of the section 3 is provided with a positioning boss 4, and the boss height H1 is 1 to 5mm; the larger the radius R value of the corner position of the section bar is, the more favorable the welding operation is, and the welding quality of the welding seam at the fillet part is improved.

Further, as shown in fig. 4, a positioning boss is machined on the inner side of the section bar to obtain a groove 9 matched with the casting, and the length L of the groove is 8-15 mm consistent with the insertion depth of the casting; the left casting and the right casting are inserted into the section bar part and form self-positioning through matching with the groove 9 on the inner side of the section bar, the position of the section bar during welding can be effectively fixed, and the product size is ensured to meet the use function.

Further, as shown in fig. 4, the position of the cast weld joint is formed by machining, a step structure is arranged, the outer side surface 6 of the step is flush with the outer surface of the section, the inner side surface 8 of the step is inserted into the section, and the thickness T4 of the whole step is 0.8-1.5 times of the thickness T2 of the cast wall; the step structure can ensure that the matching size of the section bar at the welding seam and the casting is stable and the quality consistency of the welding seam is good; on the other hand, the step position has uniform thickness which is 0.8-1.5 times of the casting wall thickness T2, and compared with the side thick and large part of the traditional welding seam casting, the steel pipe has the advantage of light weight.

Further, as shown in fig. 4, in order to enhance the strength performance of the welded joint, a reinforced step structure is provided, the height H2 of the outer side surface 6 of the reinforced step, which is higher than the casting body, is 1-5 mm, and the thickness T3 of the outer side step is 1.2-2 times of the casting wall thickness T2. The reinforced step structure can effectively reduce the stress value at the welding interface, meet the requirement of product strength performance and improve the product safety.

Claims

1. The improved aluminum alloy auxiliary frame comprises a left casting and a right casting which are respectively inserted into two ends of a section, the section completely wraps a protruding interface of the casting, and a welding mode of metal inert gas shielded welding is adopted, so that the whole circumference is fully welded, and the improved aluminum alloy auxiliary frame is characterized in that welding grooves are formed in two ends of the section, the angle of the groove is 30-60 degrees, and the thickness of the thinnest position of the groove is 0-3 mm;

the radius of four corners of the rectangular section is between R10 and R25, the inner side of the section is provided with a positioning boss, and the protruding height of the boss is 1-5 mm;

a positioning boss is machined on the inner side of the section bar to obtain a groove matched with the casting, and the length of the groove is 8-15 mm consistent with the insertion depth of the casting;

the casting weld seam position is formed in a machining mode, a step structure is arranged, the outer side face of the step is lower than the surface depth of the casting by 1-3 mm, the outer side face of the step is flush with the section, the inner side face of the step is inserted into the section, and the thickness of the whole step position is 0.8-1.5 times of the casting wall thickness.

2. The improved aluminum alloy auxiliary frame as claimed in claim 1, wherein a reinforced step structure is provided, the outer side surface of the step is 1-5 mm higher than the casting body, and the thickness of the outer step position is 1.2-2 times of the casting wall thickness.