1. Internal high pressure forming technology

Inner high pressure forming technology is a new forming technology that has only emerged in recent years, and is a current international research front. According to their structural characteristics, various connecting parts can be formed at one time by internal high pressure forming method, or can be first made into profiles by general extrusion method, and then corrected by internal high pressure forming method, and can be fed by internal pressure and axial force. The tube blank is pressed into the mold cavity to form it.

Due to the excellent internal high-pressure forming performance and great design freedom, an internal high-pressure formed part can replace the workpiece formed by welding of several parts, thus avoiding distortion and deformation caused by welding, and has high dimensional accuracy and mechanical properties. Its main advantages are: reducing quality and saving materials.

2. Precision Die Casting Technology

The connectors of aluminum alloy body frame structure are mostly used for casting. The casting methods used are mainly advanced high-precision die casting methods such as semi-solid die casting. There are currently two forming processes for semi-solid die casting technology: rheological forming and thixoforming forming. The former is to feed liquid metal into a specially designed injection molding barrel, which is sheared by a spiral device to cool it into a semi-solid slurry, and then die-casting. The latter is to send solid metal particles or chips into a spiral injection molding machine, and the metal particles are turned into a slurry under the conditions of heating and shearing, and then die-casting.

At present, the semi-solid metal casting used in industrial applications at home and abroad mainly refers to thixotropic casting, which is widely used in body frame structures. As a precision forming method, thixotropic casting has high strength of the workpiece after forming, and can realize one-time forming of complex shapes. It can be used to realize the mass production of various non-cutting or minimal cutting parts, reducing the number of parts.