Metal wire drawing is the core process that determines the quality of finished cold heading steel wires. The dimensional accuracy, surface condition and internal grain structure of the wire directly affect the forming yield and mechanical properties of fasteners such as screws, bolts and nuts. Having been deeply engaged in the manufacture of automotive fastener wires for many years, Wuxi Aotian Steel Wire Products Co., Ltd. has continuously focused on the iteration of wire drawing technology and the intelligent transformation of production lines, advanced the upgrade of the complete set of breakdown-intermediate-fine continuous wire drawing system, and built an integrated, traceable, green and low-consumption modern wire drawing production system, empowering the upgrade of the automotive parts supply chain with hard-core process strength.
The production line upgrade advanced this time covers all key links of the whole process, and each process has been repeatedly debugged and optimized to achieve dual improvement in quality and efficiency.
In the front-end breakdown drawing section, Aotian adopts the large compression ratio and low-stress drawing technology to minimize the internal damage of the wire rod and lay a high-quality foundation for the subsequent processes; the middle section is equipped with an intelligent tension closed-loop control system, which can real-time correct the wire drawing deformation, and fundamentally eliminate common quality problems such as uneven thickness and bamboo joint wires; the back-end fine drawing section is equipped with an environmentally friendly long-acting lubrication system, combined with online metallographic and outer diameter non-destructive testing equipment, stably controlling the millimeter-level tolerance within ±0.02mm, ensuring no scratches, peeling or oxidation spots on the wire surface, greatly improving the adaptability of subsequent cold heading and thread rolling processing.
It is worth mentioning that the entire wire drawing process is synchronized with the IATF16949 automotive quality control system. Each roll of drawn steel wire has a full-process traceability file. From raw material warehousing, drawing processing, online testing to finished product delivery, key data are recorded in real time and can be traced, ensuring stable and unified quality of each batch of products. With mature intelligent wire drawing technology and strict quality control, Aotian's drawn steel wires have been widely used in automotive engine fasteners, chassis connectors, body standard parts and other fields, and have won long-term recognition and cooperation from many well-known domestic and foreign automotive parts manufacturers.
