Ribbed steel bar production line complete process
Core processes and equipment of the production line
1. Raw Material Preparation
Raw material: Billets produced through continuous casting, whose chemical composition (e.g., carbon, manganese, silicon, etc.) strictly meets rebar grade standards.
Loading: Billets are fed into the heating furnace in an orderly manner via a chain elevator or walking beam.
2. Heating
Equipment: A walking beam heating furnace is typically used.
Purpose: To uniformly heat the billet to the austenitic temperature range of approximately 1050-1200°C, imparting good plasticity and facilitating deformation during rolling.
3. Rolling - The Heart of the Production Line
The rolling process is typically divided into multiple stages. Rollers arranged in roughing, intermediate, and finishing mills gradually reduce the billet to the target rebar diameter, forming surface ribs in the process.
- The roughing mill performs the initial diameter reduction of large-section steel billets.
- The intermediate rolling mill further reduces the diameter of the rolled product, bringing its cross-sectional shape closer to the finished product.
- The finishing mill is the key step in the final forming process. Here, the rolled product passes through a specially grooved finishing mill stand. The rolls are engraved with grooves corresponding to the rib pattern of the steel bar, thus forming transverse and longitudinal ribs on the surface of the steel bar.
4. Thermomechanical Rolling - Key Process
Modern high-strength rebar (such as HRB400E and HRB500E) generally utilizes a combination of residual heat quenching and autotempering.
Process: After exiting the finishing mill, the rebar enters a high-efficiency water-through cooling unit, rapidly cooling the surface layer to form a hard martensite structure while the core remains hot.
Autotempering: After exiting the cooling unit, the heat from the core rapidly dissipates outward, "tempering" the martensite layer on the surface, creating a tempered bainite structure with excellent overall properties.
Advantages: Significantly improves the strength and toughness of the rebar without or with minimal addition of expensive alloying elements.
5. Finishing and Collection
Cooling Bed: Allows cooled rebar to run smoothly and further cool to room temperature while preventing bending.
Cold Shearing: Cuts long rebar into fixed lengths (e.g., 9m or 12m).
Straightening: A straightener eliminates bending that occurs during cooling and transportation.
Collecting and Bundling: Automatically counts and collects rebar, then uses a baler to bundle it into neat bundles for easy transportation and storage.
Company Profile
Hebei Hylite Machinery Co., Ltd. is located in the center of the Beijing-Tianjin-Hebei economic & technological region - Xianxian Economic Development Zone, where is the birthplace of motto "Seeking Truth From Facts". The factory covers an area of 50 acres. We are engaged in the R&D, manufacturing and sale service of equipment for steel bar and metallic wire processing.
*Has many years of rich experience in steel processing equipment, has a professional R & D team and after-sales service team based on Italian designers, the production of a variety of direct wire drawing machine, horizontal wire drawing machine, high-speed cold rolling ribbed steel equipment, steel stranding equipment, steel stranding equipment, PC steel rod equipment, welding wire equipment, steel stranding machine and other large and medium-sized steel processing equipment can be customized.
*Products in the industry in the world's leading level, application fields: mesh production industry, steel distribution industry, transportation, hardware, hydraulic, electric power, mining and so on.
*The company has 19 patents, including 4 invention patents and 7 utility model patents, and has cooperated with professors in various universities to jointly develop a number of steel bar processing machinery technology with the concept of intelligent, efficient, energy-saving, easy to use, durable and green environmental protection.
*The company passed ISO9001 quality management system certification: export EU CE certification, The company won the "Hebei Province Famous Trademark", "China Famous Brand", "CCTV Cooperative brand "China Brand Innovation and Development Project recommended brand", "Hebei Province science and technology smes", "Safety production standardization", "Hebei Province environmental emission standard enterprises", "quality, credit double guarantee unit", "Hebei Province quality and technical supervision quality, credit double", "Focus on quality and credit key display unit"
