Shandong Zhongji Luyuan Machinery Launches CNC Rebar Cutting, Threading and Polishing Production Line, Solving Efficiency and Quality Issues in Infrastructure Rebar Processing

The independently developed CNC Rebar Cutting, Threading and Polishing Production Line by Shandong Zhongji Luyuan Machinery has been put into application in key infrastructure projects such as the reconstruction and expansion of Ji-Qing Expressway and Jinan Metro Line 6. This intelligent equipment, which integrates three core processes of "cutting, threading and polishing", has completely changed the traditional rebar processing situation characterized by "decentralized operation, manual dependence and fluctuating precision", providing a brand-new solution for the intensive and standardized upgrading of the rebar processing link in China's infrastructure industry.

In infrastructure projects, rebar processing is a key link throughout the entire project, and its quality and efficiency directly affect the project progress and structural safety. For a long time, the industry has generally adopted a decentralized processing mode of "manual cutting + single-machine threading + manual polishing", which has multiple pain points. Taking the processing of ribbed steel bars with a diameter of 25mm as an example, the traditional method requires 3 workers to operate in division of labor: one worker uses a grinding wheel saw for cutting, with an error often reaching 3-5mm; one worker operates the threading machine, and the qualification rate of thread joints is only about 85% due to uneven force control; one worker uses sandpaper to polish burrs, which not only causes dust to fill the air and pollute the environment, but also easily leads to loose connection of subsequent rebars due to incomplete polishing. In addition, manual transfer of rebars is required between processes, with the per capita daily processing volume being less than 1.5 tons. Moreover, labor costs have been rising year by year due to labor shortages, making it difficult to meet the "high-efficiency, high-precision and green" construction requirements of modern infrastructure.

First, efficiency is doubled and labor costs are significantly reduced. The production line is equipped with a high-precision servo feeding system and a double-cutting mechanism, which can automatically complete the fixed-length measurement and precise cutting of rebars, and the cutting speed is 3 times higher than that of traditional grinding wheel saws; the subsequent threading process adopts adaptive torque control technology to automatically match the threading parameters of rebars of different specifications without manual adjustment; in the polishing link, multiple sets of wire wheels and dust removal devices are linked to realize automatic burr removal and dust collection. According to actual tests, when the production line processes ribbed steel bars with a diameter of 20-32mm, it can handle 30-35 tons per day (based on an 8-hour working system) and only requires 2 operators (1 main operator to monitor the system and 1 auxiliary worker for feeding). Compared with traditional processing methods, the efficiency is increased by 4 times and labor costs are reduced by more than 60%.

Third, it is green and safe, meeting the requirements of modern construction. Infrared safety light curtains and emergency stop buttons are installed at key parts of the equipment. When operators approach moving parts, the system automatically shuts down; at the same time, the production line adopts low-noise motors and shock absorption design, and the operating noise is controlled below 75 decibels, which improves the "high-noise and high-dust" working environment of traditional processing workshops and meets the green construction requirements of infrastructure projects.

Industry experts point out that the CNC Rebar Cutting, Threading and Polishing Production Line of Shandong Zhongji Luyuan Machinery has transformed rebar processing from "decentralized manual operation" to "intensive intelligent production". It not only solves the efficiency and quality problems of individual projects, but also promotes the transformation of the rebar processing industry from "labor-intensive" to "technology-intensive". With the in-depth advancement of China's "Transportation Power" and "New Infrastructure" strategies, such integrated and intelligent processing equipment will become the core equipment for reducing costs and increasing efficiency in infrastructure projects.