What is the reason for the damage to the surface of the aluminum casing motor casing?

Aluminum casing The Washing machine DC Motor casing is made of aluminum alloy, which is convenient to process, has high flexibility and high grade, which can effectively improve the added value of the product. The aluminum profile shell is a shell processed on the aluminum profile obtained by aluminum drawing. It has high flexibility and can be cut at any depth. Generally, there are circuit board card slots inside, as long as the circuit board is directly inserted, there is no need to do it again. fixed.

The convenience is unmatched by other types of shells, but the aluminum profile shells generally have poor waterproofness and are not suitable for use in the wild and harsh environments. What is the reason for the damage to the surface of the aluminum casing? The following editor will explain to you:

①There are debris on the mold cavity or working belt, and the hardness of the working belt of the mold is low, so that the surface of the working belt is injured during extrusion and the profile is scratched.

② There are exposed metal or graphite strips in the discharge rail or swing bed with hard inclusions, which will scratch the surface of the profile when it comes into contact with the profile.

③ When the fork bar sends the profile from the discharge track to the swing bed, the profile is bruised due to the high speed.

④ There are debris or segregation of ingot components on the surface of the ingot. When there are a large number of segregation floats on the surface of the ingot and the ingot has not been homogenized or the homogenization treatment effect is not good, there are a certain number of hard metal particles in the ingot. During the extrusion process, when the metal flows through the working belt , these segregation floats or hard metal particles adhere to the surface of the working belt or cause damage to the working belt, and eventually scratch the surface of the profile.

The connecting parts of the aluminum alloy body frame structure are mostly formed by casting, and the casting methods used are mainly advanced high-precision die casting methods such as semi-solid die casting. There are currently two forming processes in semi-solid die casting technology: rheological forming process and thixoforming process. In the former, liquid metal is fed into a specially designed injection molding barrel, sheared by a screw device to cool it into a semi-solid slurry, and then die-cast.

The latter is to send solid metal particles or chips into a screw injection molding machine, and under the conditions of heating and shearing, the metal particles are turned into a slurry 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 achieve mass production of various parts without cutting or very little cutting, reducing the number of parts.