CNC Steel Bar Sawing, Threading and Grinding Production Line

The whole process from raw material feeding to finished product collection is mechanically automated. Actions such as steel bar conveying, turning and positioning do not require manual intervention. Only 2 operators are needed to control the entire production line, reducing labor costs by more than 60% compared with the traditional manual processing mode. A single shift can produce 20 sections of 12-meter standard steel cages per day, and the comprehensive efficiency is increased by more than 2 times.

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Product Details

The CNC steel bar sawing, threading and grinding production line is a fully automatic intelligent equipment integrating electrical, hydraulic and pneumatic systems, tailor-made for threaded steel bar processing. Integrating European design concepts with domestic engineering practical needs, this equipment realizes integrated operation of the entire process of steel bar sawing, length fixing, threading and grinding, which completely changes the traditional manual decentralized processing mode. It is widely used in various construction engineering fields such as bridges, high-speed railways, housing construction and prefabricated component factories, and is a core equipment for improving the efficiency and quality of steel bar processing.

Rebar Cutting, Threading and Polishing Machine

I. Core Structure and Working Process

The equipment adopts a modular design and consists of six core modules: feeding and storage system, sawing system, threading system, grinding system, conveying system and CNC control system. All links are seamlessly connected to realize assembly line operation:

Feeding and Storage Stage: Equipped with a large-tonnage raw material storage rack, which can be linked with the bar automatic feeding machine to realize the "circular batching" mode - the next batch of raw material supply can be completed before the end of the previous processing cycle, greatly reducing the standby time. The fully automatic feeding roller table adopts a V-shaped wear-resistant roller design, which has both noise reduction and wear-resistant properties, avoiding secondary handling of raw materials, and the steel bar conveying speed can reach 90m/min.
Precision Sawing Stage: The sawing main machine adopts a double-column structure design, which has stable lifting and sawing; the hydraulic cylinder double-sided material pressing device provides strong clamping force to ensure no movement of the steel bar during the sawing process and reduce saw blade loss. The servo motor drives the lead screw mechanism to control the fixed length, and the encoder is used for real-time measurement. The fixed length accuracy reaches ±2mm, supporting processing in the length range of 2.0-12m, and the leftover material can be controlled within 1cm, significantly improving material utilization. For steel bars of different specifications, the single sawing efficiency is excellent. For example, it only takes about 1 minute to saw 18 Φ20 threaded steel bars.
Automatic Threading Stage: The threading roller table automatically conveys the sawn steel bars through V-shaped wheels, and can complete feeding and positioning without manual assistance. The threading main head realizes the full-process operation of automatic clamping, rib stripping and thread rolling. It can flexibly choose single-end or double-end threading mode according to processing needs, and is suitable for steel bars of various strength grades such as HRB335, HRB400 and HRB500.
Fine Grinding Stage: A customized milling head grinding mechanism is adopted, equipped with six high-strength blades, which perform all-round grinding on the threaded ends of the steel bars after threading to remove burrs and oxide layers, ensuring that the surface smoothness of the threaded ends meets the connection standards. The blades have a long service life and are easy to replace.
Finished Product Collection Stage: Through the connection between the intelligent material turning mechanism and the finished product silo, the ground steel bars are automatically classified and collected, realizing the whole-process unmanned circulation from raw materials to finished products.

II. Core Performance Parameters

Parameter Category	Specific Indicators	Remarks
Processing Range	Steel bar diameter: 12-50mm; Length: 2.0-12m	Suitable for HRB335/400/500 grade threaded steel, round steel, etc.
Sawing Performance	Sawing width: 450mm; Fixed length accuracy: ±2mm; Stepless speed regulation of feeding speed	Double-column structure, hydraulic double-sided clamping
Production Efficiency	800-1000 thread ends sawed and threaded per 10 hours/day; 400-500 steel bars	18 Φ20 steel bars per single sawing minute
Power Configuration	Total power: about 45kW; Sawing main motor: 4kW; Oil pump motor: 1.1kW	Energy-saving power system, energy consumption reduced by 30% compared with traditional processes
Equipment Specifications	Overall dimensions: 28000×7000×2000mm; Large-tonnage raw material storage rack	Suitable for large-scale production site needs
Processing Capacity	30 Φ12 steel bars per time; 18 Φ20 steel bars per time; 9 Φ40 steel bars per time	Different diameters match different sawing quantities

III. Core Competitive Advantages

1. Full-process Automation with Significant Cost Reduction and Efficiency Improvement

The whole process from raw material feeding to finished product collection is mechanically automated. Actions such as steel bar conveying, turning and positioning do not require manual intervention. Only 2 operators are needed to control the entire production line, reducing labor costs by more than 60% compared with the traditional manual processing mode. A single shift can produce 20 sections of 12-meter standard steel cages per day, and the comprehensive efficiency is increased by more than 2 times.

2. Precise Control to Improve Material Utilization

Adopting servo motor + encoder dual fixed-length control, the sawing length error is controlled within ±2mm, the shortest steel bar leftover material can be 1cm, and the material utilization rate is increased by more than 1.5% compared with traditional processes. The threading process realizes automatic rib stripping and thread rolling, and the thread end accuracy meets national standards, with a butt joint qualification rate of 100%, avoiding rework loss.

3. Strong Durability and Lower Operation and Maintenance Costs

Key components are made of high wear-resistant materials: the conveying roller adopts a V-shaped wear-resistant roller design, and its service life is increased by 50%; the sawing main machine has a double-column structure combined with hydraulic clamping, which reduces saw blade loss by 30%; the grinding machine adopts a customized milling head and six-blade design, which can work continuously for more than 300 hours after a single replacement. The equipment has a low failure rate, and the annual operation and maintenance cost is 20% lower than that of similar products.

4. Flexible Adaptation to Meet Diverse Needs

It can flexibly switch between single-end/double-end threading modes according to construction needs, supports the processing of full-specification steel bars of 12-50mm, and can adapt to steel bars of different diameters without changing molds. The CNC system is equipped with an industrial PLC and a touch screen, which can store 7 sets of production parameters, support intelligent memory length measurement, and quickly respond to multi-batch production needs.

IV. Application Scenarios and Successful Cases

This production line is suitable for various scenarios such as bridges, expressways, railways, high-rise buildings, prefabricated component factories and steel bar processing and distribution centers, especially suitable for large-tonnage and high-standard steel bar processing needs. At present, it has been successfully applied in many large-scale infrastructure projects such as China Railway 12th Bureau Group and China Major Bridge Engineering Bureau Group. The daily processing of steel cages reaches 180 meters, saving more than one million yuan in labor costs annually, and the standardized output fully meets the strict requirements of supervision.

V. Service Guarantee System

Installation and Commissioning: Provide on-site survey, customized installation plan and free commissioning services to ensure the equipment is put into production quickly.
After-sales Response: 24-hour maintenance response mechanism, feedback solutions within 24 hours after acceptance, and spare parts warehouses are set up in many places across the country.
Training Services: Provide special training for operators, covering the entire process of equipment operation, daily maintenance and fault diagnosis.
Value-added Services: Implement three-stage return visits (1 month after delivery, 6 months after delivery, and 1 year after the expiration of the quality guarantee period), and provide value-added services such as technical upgrading and on-site inspection.