In the field of modern metal processing, various advanced technologies emerge in an endless stream. The cold extrusion process stands out with its unique advantages and becomes the focus of attention and application in many industries.
Cold extrusion process concept
Cold extrusion refers to a processing method that uses a die under a press to apply pressure to a metal blank at room temperature to cause it to undergo plastic deformation, thereby obtaining parts or blanks with the desired shape, size, and performance. This process is different from hot processing. It does not require heating of the metal and can complete the forming process at room temperature, greatly reducing energy consumption and structural changes caused by heating.
Characteristics of cold extrusion process
High material utilization rate
During the cold extrusion process, the metal material mainly undergoes plastic flow under the constraint of the mold, and basically no cutting waste is generated.
High production efficiency
Cold extrusion usually uses a press to form in one step, which is simple to operate and has a short production cycle.
High product precision
Through the control of high-precision molds, the dimensional accuracy of cold extrusion products can reach ±0.05mm, and the surface roughness can reach Ra0.4 - 1.6μm. Parts close to the finished product size can be directly produced, reducing subsequent processing steps and improving product quality and production efficiency.
Enhanced product performance
During the cold extrusion process, the internal grains of the metal are refined and the organization is denser, thereby improving the strength and hardness of the parts, while improving the fatigue strength and wear resistance of the metal, and improving the overall performance of the product.
High requirements for equipment and molds
Cold extrusion needs to be carried out on a special press, and the press needs to have sufficient pressure and rigidity. The mold has to withstand huge pressure and friction, so it is necessary to use high-strength and high-wear-resistant mold materials, and carry out complex design and manufacturing, which increases the initial investment cost of equipment and molds.
Effect of cold extrusion process
Forming complex parts
For some parts with complex shapes that are difficult to manufacture using traditional processing methods, such as special-shaped cross-sections and parts with concave or convex structures, the cold extrusion process can achieve one-time molding through mold design, greatly expanding the design and manufacturing space of parts.
Reducing processing costs
Due to high material utilization, high production efficiency and reduced subsequent processing steps, the cold extrusion process can significantly reduce the processing cost of parts in mass production and improve the economic benefits of the enterprise.
Improve product quality stability
During the cold extrusion process, product quality is less affected by human factors, the production process is relatively stable, and the consistency of product quality can be guaranteed, meeting the needs of industries with high requirements for product quality stability.
Application fields of cold extrusion process
Various parts of automobile engines, such as piston pins, valve tappets, universal joints, etc., are manufactured in large quantities using cold extrusion process.
Aerospace
The aerospace field has extremely high requirements for the quality and performance of parts. Parts manufactured by cold extrusion process have advantages in strength and weight. They are often used to manufacture aircraft engine blades, landing gear parts, spacecraft structural parts, etc., reducing the weight of the aircraft while ensuring its structural strength.
In the electronic and electrical industry, various small precision parts such as electronic connectors and relay parts can be produced with high precision and high efficiency by cold extrusion process.
Hardware tools
In the manufacture of hardware tools such as wrenches and screwdrivers, cold extrusion process is used to manufacture the head and rod of the tool.
As an advanced metal processing technology, cold extrusion technology is widely used in many fields with its unique advantages. Xuanmin has a professional technical team, and all team members have many years of industry experience and profound attainments in extrusion technology. Contact us to provide you with customized welding solutions!
