With the increasing environmental pollution problems, the energy-saving and consumption-reducing effects brought by automobile lightweighting , and it have become more and more popular.
automotive lightweighting:
http://www.focusweld.com/?p=3134&preview=true
In the field of automotive lightweighting, the application of aluminum alloys is increasingly widespread, especially for aluminum alloy profiles. Due to the short development cycle, The cost of the mold is low; the structure can be arbitrarily changed; it is increasingly valued by the automotive industry. New energy vehicle
Welding process:
In the new energy vehicle industry, the materials used in the aluminum alloy body are mainly 6-series and 5-series aluminum alloys, it is profiles and a small amount of aluminum alloy castings.
Connection method: welding + riveting
Material thickness: body frame 2~4mm;
Body skin 1.2~1.5mm
Process analysis: The welding strength of the skeleton part of the car is relatively high, mostly in the form of butt joint, lap joint or corner joint. It has high requirements for penetration depth and defects.
The workpiece needs to be sampled after welding; The skin part is mostly used in the form of connection. There are many short welds of 10~20mm, which do not carry load and impact force.
Solution:
1. Front sub frame (profile + profile)
Base metal: 6 series aluminum magnesium silicon alloy
Plate thickness: 2~4mm
Connector form: corner joint, butt joint
Wire diameter: 1.2mm
Protective gas: 99.99% Ar
Welding process: pulse MIG
Welding equipment: YD-500GP5
2, anti-collision beam (profile + profile)
Base material: 6 series aluminum magnesium silicon alloy plate thickness: 2~4mm
Connector form: corner joint
Wire diameter: 1.2mm
Protective gas: 99.99% Ar
Welding process: pulse MIG
Welding equipment: YD-500GP5+ robot
3, the body sub-assembly (profile welding)
Base metal: 6 series aluminum magnesium silicon alloy + 5 series aluminum magnesium alloy
Plate thickness: skeleton 2~4mm; skin 1.2mm
Connector form: corner, butt and overlap
Wire diameter: 1.2mm
Protective gas: 99.99% Ar
Welding process: pulse MIG
Welding equipment: YD-500GP5
4, robot welding electric bus battery pack
Base metal: 6 series aluminum magnesium silicon alloy
Plate thickness: 2.5~5mm
Connector form: corner joint, overlap
Wire diameter: 1.2mm
Protective gas: 99.99% Ar
Welding method: double pulse
Welding equipment: Active TAWERS
f related mechanical properties test
The relevant mechanical properties of new energy vehicles are tested and their tensile strength and bending properties are measured.
The tensile and bending mechanical properties of the welds of the two materials are in line with national standards
