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What is Brass?
The soft and light silvery white metal of aluminum, with its nonmagnetic and nontoxic properties, is almost one-third as dense as copper or steel, guaranteeing excellent corrosion resistance and long-lastingness. It is important to use high performance variety of aluminum from trusted and reliable suppliers for aluminum stampings operations.
In comparison to deep-drawing steel, aluminum possesses inferior stretch distribution characteristics, depending on the alloy. It strains locally, indicating the occurrence of a restricted area stretching operation while the metal is put through a stretching operation.
It is to be noted that stamped aluminum parts need to be designed such that the part form compels the metal to distribute stretch more smoothly, conforming to the fact that creating punch geometry has bigger control on the stretchability of the metal rather than the metal itself.
A metal's capacity to run smoothly when exposed to tension is called drawability. Depending on the variety, aluminum can, by and large, draw wonderfully. The reductions percentages are strangely similar to those mostly utilized while drawing deep-drawing steel.
Despite the softness of aluminum, it is still abrasive, forming a powdery white substance known as aluminum oxide, which is utilized in manufacturing grinding wheels. This implies that the same substance that you have been making use of to grind your tool steel block parts can exist on the aluminum sheet surface as well. This problem of poor interface can be evaded by employing high-pressure barrier lubricants. These will control the aluminum from contacting the tool steel sections while cutting and forming.
Aluminum surely is a great material when it comes to compression. In the process of compressing, the metal is ironed down a vertical screen to enlarge the surface area and reduce the metal's depth. It expands the aluminum sheet's surface area by compressing the metal rather than by applying the act of stretching. When aluminum is compressed, it runs out smoothly like a hot fluid along the wall of the die opening and it gives a reflective finished surface.
Aluminum has more springback than soft draw-quality steel, which means that an aluminum part, post its stress release, returns to its original form more quickly than its counterparts. The springback amount can be controlled by customizing the stamped product in accordance with the springback value.
All things said and done, the controlling issues contributing to the success of a process of aluminum stamping are far too many and several of these factors are regulated to a large extent by the technical qualities of the particular variety of aluminum sheet you are using.