The special-shaped wire rod refers to a medium solid wire rod processed into various cross-sectional shapes other than round, regular hexagonal, square and rectangular. Compared with traditional cutting, grinding and sheet metal processing, due to the use of cold rolling and cold rolling production, it has various advantages such as light weight, improved yield, simplified process, improved precision, and smooth metal surface. Can significantly reduce costs.

The section of the special-shaped wire spring is special-shaped, so high spring characteristics can be obtained. Quenching, tempering, excellent integrity, elastic limit expansion, can get high surrender point, durability is improved.

The materials of the special-shaped wire include carbon steel, alloy steel, stainless steel, copper and copper alloy, titanium and titanium alloy, etc.

The use of special-shaped line

The use of special-shaped line is various. Used for mechanical parts, such as bolts and springs, the edges of skis, necklaces, and electric wires for electric blankets, watchbands for watches, frames for glasses, transmission lines for guitars, model tracks, etc. in addition,

The use of special-shaped line in the spring is also a lot. Mainly used for home appliances and office equipment springs, automobile clutches, brakes, wiper arms, lighter springs, bicycle brake springs, etc. If the cross-sectional shape of the spring is made abnormal, high overweight and long life compared with the general round spring are realized. In addition, as compared with a round spring of the same torque, the outer diameter of the coil is small, and the spring has an advantage of being compact and lightweight.

principle of special-shaped line

The special-shaped wire is a wire having its own functionality and can be easily obtained in a state close to the final product, so it has the characteristics of not requiring surface processing, simplifying the manufacturing process, reducing the cost, and the like. The manufacturing method is to obtain special-shaped wires of various cross-sections by cold drawing or cold rolling processing of material coils of ordinary circular cross-sections.

The manufacturing process is to keep the material in the state of the coil for surface treatment, and then use the platen to stretch the coil, and then roll it into a coil. Then cauterize as needed. The special-shaped wire used in the spring material shall be quenched and tempered.

The life of the spring material, for example, in the case of a torsion spring, the durability of a round wire is about twice as great as that of a special-shaped wire having the same outer diameter and the same number of crimps. Similarly, in the case of the same number of rolls and the same free length, approximately six times the durability can be obtained.

The characteristics are changed depending on the type of the substrate, and suitable characteristics are obtained depending on the application. For example, low carbon steel, by hard pressing and tempering, forming and post-processing become easy. In high carbon steel and alloy steel, through tanker treatment and high-frequency quenching, the uniform and stable steel structure is realized, and the tensile strength and fatigue characteristics are improved. Stainless steel is also hard pressed and tempered.

There is also a case where various surface treatments are carried out to improve the corrosion resistance and to improve the appearance. For example, the corrosion resistance is further improved by surface coating with zinc and an alloy of zinc and aluminum. In addition, according to the coating film of resin or the like, it can be recognized by color, and stainless steel can also be colored.