Aluminum alloy with the number 7075 has a high yield strength and is frequently utilized in aerospace and other high-stress applications. The alloy is renowned for having a remarkable strength-to-weight ratio as well as the capacity to withstand significant amounts of stress and strain. Extrusion of aluminum is a manufacturing process that is commonly used to create complex shapes and profiles from aluminum, including 7075 aluminum. Extrusion is a term that refers to the process of forcing molten aluminum through a die at high pressure. Extrusion of 7075 aluminum will be the topic of discussion in this article, during which we will take a closer look at the manufacturing process.
Production Process of 7075 Aluminum Extrusion:
7075 aluminum extrusion is a process that involves the shaping of 7075 aluminum alloy into a specific shape or profile. The process begins with the creation of a die, which is a mold that is used to shape the aluminum into a specific form. The die is typically made from steel and is created using computer-aided design (CAD) software. Once the die is created, it is mounted onto an extrusion press.
Step 1: Heating the Aluminum Billet
The first step in the 7075 aluminum extrusion process is heating the aluminum billet. The billet is a large block of 7075 aluminum alloy that is heated to a temperature of around 800°F. This temperature is required to soften the aluminum and make it malleable enough to be extruded.
Step 2: Pre-Extrusion
After the billet has been heated, it is placed into the extrusion press. The press is designed to apply a large amount of pressure to the billet, which forces it through the die. Before the billet is extruded, however, it must go through a process known as pre-extrusion. During pre-extrusion, the billet is compressed in the press to remove any surface irregularities or imperfections.
Step 3: Extrusion
The next step in the 7075 aluminum extrusion process is the actual extrusion of the aluminum. During extrusion, the billet is placed under high pressure and forced through the die. The die shapes the aluminum into the desired profile, and the extruded aluminum emerges from the press as a long, continuous piece.
Step 4: Cooling and Aging
After the extrusion of the 7075 aluminum, the material is allowed to cool and then aged. In order to bring down its temperature, the aluminum is sprayed with either water or air as part of the cooling process. Aluminum that has been allowed to cool is then aged, which increases both its strength and its hardness. The aluminum is heated to a temperature of about 350 degrees Fahrenheit for a number of hours as part of the aging process. By going through this process, the aluminum is able to have its mechanical properties improved as well as strengthened.
Step 5: Finishing
The finishing process is the very last step in the process of extruding 7075 aluminum. During the finishing process, the extruded aluminum is first cut to the desired length, and then it is machined or otherwise processed to achieve the surface finish and tolerance levels that have been specified.
Extrusion of 7075 aluminum alloy is a manufacturing process that is both versatile and cost-effective. It is used to create complex shapes and profiles made from 7075 aluminum alloy. Heating the aluminum billet is the first step in the process, followed by pre-extrusion, the actual extrusion process, cooling and aging, and finally finishing. The extruded aluminum that was produced as a result possesses excellent corrosion resistance, a high degree of formability, and a high strength-to-weight ratio. Because of these characteristics, 7075 aluminum extrusion is ideally suited for use in a diverse range of applications, such as those in the aerospace industry, the automotive industry, and the military. By understanding the production process of 7075 aluminum extrusion, manufacturers can take advantage of the benefits of this versatile and cost-effective manufacturing process.