CN109834402B - Welding method of magnesium-aluminum alloy framework - Google Patents
Welding method of magnesium-aluminum alloy framework Download PDFInfo
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- CN109834402B CN109834402B CN201910281472.1A CN201910281472A CN109834402B CN 109834402 B CN109834402 B CN 109834402B CN 201910281472 A CN201910281472 A CN 201910281472A CN 109834402 B CN109834402 B CN 109834402B
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Abstract
The invention relates to a welding method of a magnesium-aluminum alloy framework, which comprises the following steps: (1) adjusting the current and voltage of the electric welding machine to make the current and voltage accord with welding parameters; (2) two ends of a plurality of steel pipes respectively penetrate through the steel nests corresponding to the positions on the two side plates, and the steel pipes extend out of the outer sides of the side plates for a certain distance; (3) measuring the vertical distance between the end surface of each steel pipe and the outer edge of the corresponding steel nest, reserving a 5mm distance, and reserving a gap for welding the steel pipes and the steel nest; (4) welding one end of the steel pipe, which extends to the outer side of the side plate, with a steel nesting contact part, and sequentially welding a plurality of steel pipes from top to bottom; (5) and after welding, checking whether redundant welding slag or welding beading exists or not, and cleaning by using a grinding machine. According to the invention, the side plate made of the magnesium-aluminum alloy and the steel are nested and integrally formed, the traditional welding of the steel pipe and the side plate is changed into the nested welding of the steel pipe and the steel, the welding is convenient and firm, the welding material is saved, the welding time is shortened, and the production cost is reduced.
Description
The technical field is as follows:
the invention relates to a welding method of a magnesium-aluminum alloy framework.
Background art:
most of the existing seat frames are of metal structures and are formed by welding and combining a plurality of metal components. When the weight reduction of the framework is considered, a member made of a magnesium-aluminum alloy material with a smaller density is generally considered to be used instead of the metal member. Because the welding performance of the magnesium-aluminum alloy is poor, a welding mode of a special process or a riveting mode is needed to be adopted for connecting the magnesium-aluminum alloy component and the steel component. No matter the special process welding or riveting is adopted, the requirements on the process and equipment are high, the production cost is improved in a phase-changing manner, and meanwhile, the product reject ratio is also improved.
The invention content is as follows:
the invention aims to solve the problems in the prior art, namely the invention aims to provide a welding method of a magnesium-aluminum alloy framework, which is reasonable in design, efficient, convenient and fast and reduces the production cost.
In order to achieve the purpose, the invention adopts the technical scheme that: a welding method of a magnesium-aluminum alloy framework comprises two magnesium-aluminum alloy side plates which are arranged in a bilateral symmetry mode and a plurality of steel pipes which are transversely arranged between the two side plates from top to bottom, each side plate is provided with a connecting hole which corresponds to the position of the steel pipes from top to bottom and is beneficial to the penetration of the steel pipes, steel nests are fixedly connected to the inner walls of the connecting holes, and the steel pipes penetrate through the steel nests and are welded with the steel nests; the welding method of the magnesium-aluminum alloy framework comprises the following steps:
step S1: adjusting the current and voltage of the electric welding machine to make the current and voltage accord with the welding parameters of the magnesium-aluminum alloy framework;
step S2: two ends of a plurality of steel pipes respectively penetrate through the steel nests corresponding to the positions on the two side plates, and the steel pipes extend out of the outer sides of the side plates for a certain distance;
step S3: measuring the vertical distance between the end face of each steel pipe and the outer edge of the corresponding steel nesting by using a ruler, and reserving a gap for welding the steel pipes and the steel nesting;
step S4: welding one end of the steel pipe, which extends to the outer side of the side plate, and a steel nesting contact part through a spot welder, performing semicircular arc welding and oblique welding during welding, and sequentially welding a plurality of steel pipes from top to bottom;
step S5: and after welding, checking whether redundant welding slag or welding beading exists or not, and cleaning by using a grinding machine.
Furthermore, the steel nest penetrates through the connecting hole, the outer walls of two ends of the steel nest are respectively provided with an annular boss A, and the outer wall of the middle of the steel nest is provided with a groove.
Further, the steel nesting sleeve and the side plate are integrally cast and formed.
Furthermore, a support shaft is transversely arranged at the lower end of the outer side of the side plate, the support shaft and the side plate are integrally cast, and an annular boss B is arranged on the outer wall of one end, close to the side plate, of the support shaft.
Further, the electric welding machine is CO2An electric welding machine; during welding in step S4, CO2The gas flow is 7-10L/min, the current is 80-130A, the voltage is 18-23V, and the wire diameter of the welding wire is 1.0 mm.
Compared with the prior art, the invention has the following effects: according to the invention, the side plate made of the magnesium-aluminum alloy and the steel are nested and integrally formed, and the traditional welding of the steel pipe and the side plate is changed into the nested welding of the steel pipe and the steel, so that the welding is convenient and firm, the welding material is saved, the welding time is shortened, and the production cost is reduced.
Description of the drawings:
FIG. 1 is a schematic perspective view of a magnesium-aluminum alloy skeleton according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of an edge plate according to an embodiment of the present invention;
FIG. 3 is a schematic perspective view of a steel nest according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a conventional steel skeleton.
In the figure:
1-steel nesting; 2-side plates; 3-a steel pipe; 4-fulcrum; 5-an annular boss B; 6-connecting hole; 7-a groove; 8-annular boss A.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-3, the invention relates to a welding method of a magnesium-aluminum alloy framework, the magnesium-aluminum alloy framework comprises two magnesium-aluminum alloy side plates 2 which are arranged in bilateral symmetry and a plurality of steel pipes 3 which are transversely arranged between the two side plates 2 from top to bottom, each side plate 2 is provided with a connecting hole 6 which corresponds to the position of the plurality of steel pipes 3 from top to bottom and is beneficial to the penetration of the steel pipes 3, a steel nest 1 is fixedly connected to the inner wall of the connecting hole 6, and the steel pipes 3 penetrate through the steel nest 1 and are welded with the steel nest 1, so that the side plates 2 and the steel pipes 3 are firmly connected together through the steel nest 1. The welding method of the magnesium-aluminum alloy framework comprises the following steps:
step S1: adjusting the current and voltage of the electric welding machine to make the current and voltage accord with the welding parameters of the magnesium-aluminum alloy framework;
step S2: two ends of a plurality of steel pipes 3 respectively penetrate through the steel nests 1 which are correspondingly arranged on the two side plates 2, and the steel pipes 3 extend out of the side plates 2 for a certain distance;
step S3: measuring the vertical distance between the end face of each steel pipe 3 and the outer edge of the corresponding steel nest 1 by using a ruler, and reserving a gap for welding the steel pipe 3 and the steel nest 1, wherein the gap is 5 mm;
step S4: welding the contact part of one end of the steel pipe 3 extending to the outer side of the side plate 2 and the steel nest 1 by a spot welder, performing semicircular arc welding and oblique welding during welding, keeping the welding speed consistent, ensuring that a welding seam is uniform and not inclined, and ensuring that the length of a welding bead is 50mm, namely the length of the outer semicircular arc of the steel pipe; a plurality of steel pipes are welded in sequence from top to bottom;
step S5: after welding, whether excessive welding slag or welding beading exists is checked, and the steel pipe and the side plate cannot be scratched by cleaning with a grinding machine.
In this embodiment, the number of the steel pipes 3 is three, the cross sections of the steel pipes are circular, and the connecting holes are circular holes.
In the embodiment, the steel nest 1 and the side plate 2 are integrally cast, the steel nest 1 penetrates through the connecting hole 6, the outer walls of the two ends of the steel nest 1 are respectively provided with an annular boss A8, and the outer wall of the middle part of the steel nest 1 is provided with a groove 7. Through set up annular boss A and slot on the steel nestification for the steel nestification plays spacing nested effect of steel when casting moulding with sideboard an organic whole, and can strengthen the intensity that both integrated into one piece are connected, prevents that the steel nestification from taking place to drop at the in-process that the atress was strikeed.
In this embodiment, the steel nest 1 and the steel pipe 3 are made of the same steel material.
In this embodiment, the lower end of the outer side of the side plate 2 is provided with a support shaft 4 (for facilitating subsequent installation of the armrest), the support shaft 4 and the side plate 2 are integrally cast, and an annular boss B5 is provided on the outer wall of one end of the support shaft 4 close to the side plate 2, so as to limit and support the support shaft, enhance the connection strength of the support shaft and the side plate when integrally formed, and prevent the support shaft from falling off in the process of being subjected to force and impact. When the side plate is provided with no handrail, as shown in fig. 2, the side plate is not provided with the annular boss B; because the difference between the framework structure with the handrail and the framework structure without the handrail is only the difference of the structure of the annular boss B, the side plate manufacturing mold can be shared, and different movable inserts can be made at different boss parts.
In this embodiment, the welding machine is a CO2An electric welding machine; during welding in step S4, CO2The gas flow is 7-10L/min, the current is 80-130A, the voltage is 18-23V, and the wire diameter of the welding wire is 1.0 mm; the welding penetration specification is more than 30% of the wall thickness of the thin part, and the foot length specification is more than 70% of the wall thickness of the thin part.
In the embodiment, the contact part of the steel pipe and the steel nest is welded in a semicircular arc manner; in the conventional welding method when the side plate is made of steel, as shown in fig. 4, when the steel pipe is welded to the side plate, arc welding is performed along the contact portion between the steel pipe and the side plate on the inner side and the outer side of the side plate. Compared with the present invention, the length of the former welding bead is 1/4 of the length of the latter welding bead, so the present invention not only saves welding materials, but also shortens welding time.
In this embodiment, it should be noted that the steel nesting, the side plate, and the steel pipe mentioned above are all general terms, and the method described in this embodiment can be adopted for connection as long as the method conforms to the magnesium-aluminum alloy component and the steel component, and the two different components cannot be directly connected by a common welding method.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (5)
1. A welding method of a magnesium-aluminum alloy framework is characterized by comprising the following steps: the magnesium-aluminum alloy framework comprises two magnesium-aluminum alloy side plates which are arranged in a bilateral symmetry mode and a plurality of steel pipes which are transversely arranged between the two side plates from top to bottom, each side plate is provided with a connecting hole which corresponds to the position of the steel pipes from top to bottom and is beneficial to the penetration of the steel pipes, steel nests are fixedly connected to the inner wall of each connecting hole, and the steel pipes penetrate through the steel nests and are welded with the steel nests; the welding method of the magnesium-aluminum alloy framework comprises the following steps:
step S1: adjusting the current and voltage of the electric welding machine to make the current and voltage accord with the welding parameters of the magnesium-aluminum alloy framework;
step S2: two ends of a plurality of steel pipes respectively penetrate through the steel nests corresponding to the positions on the two side plates, and the steel pipes extend out of the outer sides of the side plates for a certain distance;
step S3: measuring the vertical distance between the end face of each steel pipe and the outer edge of the corresponding steel nesting by using a ruler, and reserving a gap for welding the steel pipes and the steel nesting;
step S4: welding one end of the steel pipe, which extends to the outer side of the side plate, and a steel nesting contact part through a spot welder, performing semicircular arc welding and oblique welding during welding, and sequentially welding a plurality of steel pipes from top to bottom;
step S5: and after welding, checking whether redundant welding slag or welding beading exists or not, and cleaning by using a grinding machine.
2. The welding method of the magnesium-aluminum alloy framework as claimed in claim 1, wherein the welding method comprises the following steps: the steel nest penetrates through the connecting hole, the outer walls of two ends of the steel nest are respectively provided with an annular boss A, and the outer wall of the middle of the steel nest is provided with a groove.
3. A method of welding a magnesium-aluminum alloy skeleton according to claim 1 or 2, wherein: the steel nesting sleeve and the side plate are integrally cast and molded.
4. The welding method of the magnesium-aluminum alloy framework as claimed in claim 1, wherein the welding method comprises the following steps: the lower end of the outer side of the side plate is transversely provided with a support shaft, the support shaft and the side plate are integrally cast and molded, and the outer wall of one end, close to the side plate, of the support shaft is provided with an annular boss B.
5. The welding method of the magnesium-aluminum alloy framework as claimed in claim 1, wherein the welding method comprises the following steps: the electric welding machine is CO2An electric welding machine; during welding in step S4, CO2The gas flow is 7-10L/min, the current is 80-130A, the voltage is 18-23V, and the wire diameter of the welding wire is 1.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910281472.1A CN109834402B (en) | 2019-04-09 | 2019-04-09 | Welding method of magnesium-aluminum alloy framework |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910281472.1A CN109834402B (en) | 2019-04-09 | 2019-04-09 | Welding method of magnesium-aluminum alloy framework |
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| CN109834402A CN109834402A (en) | 2019-06-04 |
| CN109834402B true CN109834402B (en) | 2021-03-30 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITPD20060016A1 (en) * | 2006-01-18 | 2007-07-19 | Liebert Hiross Spa | PROCEDURE FOR THE JOINT OF TUBULAR ELEMENTS IN STAINLESS STEEL, IN AN ITS ALLOY, IN ALUMINUM OR IN OTHER EQUIVALENT METAL MATERIALS |
| CN101579777A (en) * | 2009-06-12 | 2009-11-18 | 哈尔滨工业大学 | Method for welding aluminum-steel by pre-placing Al coating on steel surface |
| CN204340797U (en) * | 2014-12-12 | 2015-05-20 | 重庆宏立至信汽车部件制造有限公司 | Seat basin welding assembly assembly |
| CN105922917B (en) * | 2016-05-16 | 2018-06-19 | 长春富维—江森自控汽车饰件系统有限公司 | Suitable for the reinforced motor vehicle Chain cushion skeleton of belt anchorage point on the seat |
| CN205970970U (en) * | 2016-08-20 | 2017-02-22 | 重庆长安汽车股份有限公司 | Connection structure of automobile seat frames and back skeleton |
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