How are Coil Springs Manufactured

How are Coil Springs Manufactured? Coil springs can be found in lots of everyday items like automobiles, garage doors, toasters, door handles, retractable pens, and clocks. Maybe you are wondering – what are coil springs? These are helical-shaped mechanical devices that can be either open-wound or closed-wound. Coil springs are designed to store mechanical potential energy to release it in a controlled manner, maintain force between two surfaces, or absorb shock. An Achille's heel of coil springs is that they have an elastic limit (the optimal amount of force they can handle). When too much force (force that exceeds their elastic limit) is applied, they often permanently distort. Now that you are familiar with some ins and outs of coil springs let’s explore how they are manufactured. Types of Coil Springs There are three main coil spring designs: compression, extension, and torsion. Compression coil springs provide resistance or absorb force when being compressed. On the other hand, extension coil springs provide resistance to stretching forces. Torsion coil springs obey Hooke's Law and are designed to resist twisting forces. Coil Spring Materials For most industrial and heavy-duty uses, metals and their alloys are the primary material for making coil springs. The properties of these metals and their alloys,

such as resistance to moisture and chemicals as well as tensile and high yield strengths, will influence sway material selection. These properties will also impact the design and fabrication of the spring. Steel alloys are the most popular metal for coil springs, as their mechanical properties allow for high tolerances in cases where extremely high stress, immense impacts, and heavy loads are required. Other common alloys for coil springs are stainless steel, copper-based, high-carbon, and nickel-based alloys. The Manufacturing Processes Steel for springs can be hardened prior to or after formation. The manufacturing process often begins with a bar stock being turned into a long wire and fed into an automatic coiler. In contrast, the wire stock is usually coiled on a lathe for smaller production runs. The coiling machines turn the spring wire around a rod to form a coiled shape. It’s at this point that decisions about the coil design, length, tension, and amount are made. The coiling machine is typically spun faster for great production runs. The raw material wire will be put on a rotating holding reel which will direct it into the coiling machine. Cleaning and lubrication are necessary before the wire enters the drive rollers of the coiling machine. A pair of fixed coiling tools will deform the wire as it enters the machine to turn it into a coil. Following this, a pitch tool implements the spring’s pitch, turning it into the necessary coil spring design. The spring is then cut to the desired length and ejected to a conveyor belt for additional finishing operations such as tempering, grinding, peening, and coating. Need Exquisitely-Crafted Coil Springs? Look no further than GL Metal, one of the world's most reputable coil spring manufacturers. This company has made high-quality springs and other wire

products for over two decades. Located in Nanhai District, Foshan City, the company boasts of having an over 10,000 square meters manufacturing plant that implements many breakthrough technologies. Let us make your coil spring dreams a reality.