We offer a comprehensive range of precision metal processing equipment, including straightening, cold drawing, pointing, chamfering, cutting, thread rolling machines, and drawing dies, tailored for tube, bar, and wire materials across diverse industries.
This Carbon Steel Vertical Multi-Roll Straightening Machine, also called a vertical multi-roller pipe and bar straightening machine, is made by Fangrong Metallurgical Equipment Co., Ltd, a company that focuses on metallurgical machinery and provides customers with reliable performance and good value for money.
The carbon steel vertical multi-roll straightening machine is specialised, high-precision finishing equipment developed for the metallurgical and metalworking industries. It's mainly used to straighten carbon steel pipes, bars, rods, and tubes, which may have bent or deformed during earlier manufacturing stages like hot/cold rolling, drawing, or heat treatment. Its vertical multi-roll design features horizontally intersecting straightening rolls arranged in a 7-roll or 10-roll configuration, making it essential for achieving excellent straightness and roundness in ferrous metal products
This machine operates based on the principle of multi-point bending and reverse deformation. As carbon steel workpieces pass through a series of inclined, crossed rollers with advanced elliptical profiles, they constantly endure alternating bending forces while rotating and moving forward. This continuous plastic deformation gradually eliminates bending, reduces ellipticity, and improves surface quality. The roller gap and angle can be precisely adjusted manually or via a servo/PLC system, allowing real-time optimisation according to material specifications and required straightness. The automatic loading and unloading system further enhances operational efficiency and safety.
This device provides an efficient solution to common challenges encountered during carbon steel processing.
• Material bending and deformation: Effectively eliminates bending, twisting, and internal stresses in carbon steel bars, tubes, and profiles during production, cooling, and transportation, significantly improving material straightness.
• Precision deficiency issue: Address the low accuracy and inconsistent performance of traditional straightening methods to ensure materials meet downstream precision machining or assembly requirements.
• Low production efficiency issue: Address the current limitations of manual or simple equipment in terms of slow straightening speed and low efficiency, enabling continuous, high-speed straightening operations to enhance overall production capacity.
• Space constraints issue: For companies with limited workshop space, the vertical structural design significantly reduces equipment footprint while facilitating loading/unloading of long materials.
• Issues of manual dependency and high labor intensity: Intelligent control systems are employed to minimize human intervention, reduce operational complexity and physical strain, thereby improving the working environment.
• Quality issues in subsequent processing: Prevent deviations during cutting, welding, and assembly caused by material misalignment, thereby improving yield rates and product consistency.
• Maintenance costs and equipment stability: Features a high-strength, wear-resistant design that reduces frequent downtime for maintenance and lowers long-term maintenance requirements.
• Personalized production adaptability: Flexible configuration enables fulfillment of straightening requirements for various carbon steel specifications and small-batch multi-product batches.
• Vertical multi-roll design: Featuring a vertically arranged multi-roll structure with scientifically optimized roll configuration, it enables multiple stages of progressive reverse bending and straightening for carbon steel materials, delivering uniform and efficient straightening results.
• Intelligent control system: Equipped with a PLC + touchscreen interface, it supports roll gap adjustment, speed control, and status monitoring for convenient and intuitive operation.
• Modular configuration: Supports selection of various roller counts and automation levels, enabling flexible adaptation to diverse production scenarios.
• High-strength, durable structure: Key components are made from premium wear-resistant materials to ensure long-term stable operation.
• Compact spatial layout: The vertical structure design occupies minimal space, facilitating workshop planning and production line integration.
Key Advantages
• High straightening accuracy: Effectively eliminates material bending and internal stresses, enabling carbon steel products to meet stringent straightness requirements for precision machining applications.
• Significant improvement in production efficiency: featuring strong continuous operation capability and adjustable straightening speed, ideal for mass production and substantially enhancing output capacity.
• High space utilization: Compared to traditional horizontal equipment, it occupies less floor space, making it particularly suitable for processing workshops with limited space.
• Simple operation and maintenance: High degree of automation reduces manual intervention, minimizes daily maintenance workload, and lowers labor costs.
• High adaptability: Compatible with various carbon steel specifications and cross-sectional shapes, supporting customized configurations to meet diverse customer requirements.
• Stable and reliable operation: featuring a robust structure with excellent durability, low failure rate, and ensuring long-term continuous production.
• Comprehensive cost advantages: improves product yield and reduces defect rates, while lowering energy consumption and maintenance costs, delivering excellent return on investment for customers.
The Carbon Steel Vertical Multi-Roll Straightening Machine offers a wide range of models (FR-20 to FR-130) to accommodate different production scales. It supports tube diameters from Φ5mm to Φ130mm with wall thickness ranging from 1-12mm, and solid bar diameters from Φ5mm to Φ60mm. Raw material length starts from 2000mm or above, with tensile strength up to 1000 MPa.
The machine achieves excellent finished straightness, significantly improving product quality. Roller configurations vary by model (7+7 or 10+1 rollers), with roller sizes ranging from Φ68×90mm to Φ250×360mm. The adjustable tilt range of 27° to -33° allows precise control for optimal straightening performance. Upper and lower roller opening distances range from 35mm to 85mm depending on the model. Equipped with high-strength structure and durable alloy rollers, this series ensures stable, efficient, and high-precision operation for carbon steel processing
Below are the key technical parameters:
| Model | FR-20 | FR-30 | FR-40 | FR-50 | FR-60 | FR-80 | FR-100 | FR-130 |
| RollersQty. | 7+7 Rollers | 7+7 Rollers | 10+1 Rollers | 6+6 Rollers | 10+1 Rollers | 10+1 Rollers | 10+1 Rollers | 10+1 Rollers |
| Raw material requirements / Tube range/ mm | φ5-φ10 Wall thickness1-7 | φ10-φ30 Wall thickness1-7 | φ10-φ40 Wall thickness1-5 | φ18-φ50 Wall thickness1-4 | φ18-φ60 Wall thickness3-12 | φ30-φ80 Wall thickness2-7 | φ40-φ100 Wall thickness2.5-10 | φ50-φ130 Wall thickness2.5-10 |
| Raw material requirements / Solid bar range/ mm | φ5-φ10 | φ10-φ15 | φ10-φ25 | φ10-φ25 | φ18-φ30 | φ30-φ45 | φ16-φ55 | φ16-φ60 |
| Raw material requirements / Raw material length/ mm | ≥2000 | >2000 | ≥2000 | ≥2000 | >2000 | >2000 | ≥2000 | ≥2500 |
| Raw material requirements / Tensile strength/MPa | ≤800 | ≤800 | ≤800 | ≤800 | ≤980 | ≤650 | ≤1000 | ≤1000 |
| Raw material requirements / Finished material Straightness/ mm/m | ≤20 | ≤20 | ≤20 | ≤20 | ≤20 | ≤20 | ≤20 | ≤20 |
| Finished material Straightness/mm/m | ≤0.3-0.5 | ≤0.3-0.5 | ≤0.3-0.5 | ≤0.3 | ≤0.8 | ≤0.7 | ≤0.6 | ≤0.6 |
| Rollers size/mm | φ68*90 | φ115*160 | φ130*210 | φ136*260 | φ150*260 | φ200*300 | φ220*300 | φ250*360 |
| Rollers size/mm | 200 | 250 | 360 | 360 | 430 | 450 | 600 | 650 |
| Upper and lower roller opening distance / mm | 35 | 45 | 55 | 65 | 75 | 75 | 85 | 85 |
| Adjustable tilt range | 27°-33° | 27°-33° | 27°-33° | 27°-33° | 27°-33° | 27°-33° | 27°-33° | 27°-33° |
Customized specifications available upon request. Table above is for reference; actual parameters may vary by material type
The carbon steel vertical multi-roll straightening machine is widely used in industries requiring high-precision straightness of carbon steel materials, serving as a core equipment for enhancing product quality and processing efficiency.
Main Application Areas
• Steel Processing and Metal Materials Industry: Suitable for manufacturers of carbon steel bars, pipes, and profiles, providing efficient straightening of materials after rolling or cooling to enhance straightness and surface quality.
• The mechanical manufacturing industry supplies high-precision carbon steel shafts, rods, and structural components to manufacturers of machine tools, construction equipment, mining machinery, agricultural machinery, and related products, ensuring optimal machining accuracy.
• Automotive and component manufacturing: Extensively applied for straightening carbon steel materials used in automotive drive shafts, steering system components, chassis parts, etc., meeting the industry's stringent requirements for high-precision components.
• Used in the petroleum, chemical, and energy industries for straightening carbon steel pipes such as those employed in oil drilling and production tubing, transmission pipelines, and boiler tubes, ensuring straightness and assembly performance while meeting requirements for high-pressure and high-strength applications.
• The Construction Engineering and Steel Structure Industry provides straightening solutions for construction steel bars, steel structural members, bridge components, etc., enhancing installation accuracy and overall stability of steel structures.
• Railway, shipbuilding, and heavy industry applications: Suitable for precision straightening of large carbon steel components such as railway track accessories, marine shaft systems, and port machinery, meeting the stringent requirements of heavy equipment manufacturing.
• Manufacturing of hardware tools and standard components: Used for pre-treatment of various carbon steel bars, providing qualified straight raw materials for the production of standard parts such as bolts, screws, and pins.
Company Heritage & Experience
FangRong Precision Machinery was founded in 1998 and has been dedicated to the design, engineering, and manufacturing of high-performance cold drawing equipment for over 26 years. We have grown from a local workshop into a globally recognized manufacturer, serving customers in more than 70 countries worldwide.
Production Capacity & Facilities
We operate two modern manufacturing facilities: Dongguan Fangrong Metallurgical Equipment Co., Ltd. in Guangdong Province and Yangjiang Fangrong Machinery Co., Ltd. in Guangdong Province. Our annual production capacity exceeds 650 machines, with an average annual turnover of 45 million RMB. Dual-factory operations ensure faster delivery and optimized cost structures.
Two Manufacturing Facilities
FangRong operates two state-of-the-art manufacturing facilities strategically located in Guangdong Province:
- Dongguan Fangrong Metallurgical Equipment Co., Ltd. -- Located in Dalang Town, Dongguan City, the company's headquarters and primary manufacturing base. This facility specializes in the production of precision cold drawing machines, straightening machines, and thread rolling equipment.
- Yangjiang Fangrong Machinery Co., Ltd. -- Located in Yangdong District, Yangjiang City, this facility expands our production capacity and enables faster delivery to customers.
Our manufacturing process for the Carbon Steel Vertical Multi-Roll Straightening Machine follows a rigorous, quality-controlled workflow from order to delivery:
1. Order Confirmation & Design -- Each machine is custom-engineered to meet specific customer requirements, including tube/bar diameter range, material type, straightening precision, and production capacity..
2. Material Procurement & Inspection -- All raw materials, including high-strength steel frames, 9Cr2Mo alloy rollers, hydraulic components, and electrical parts, are sourced from qualified suppliers and undergo strict incoming quality inspection.
3. Machining & Fabrication -- Precision machining of critical components such as the main frame, multi-roller assemblies, roller shafts, and adjustment mechanisms.
4. Sub-Assembly -- Assembly of hydraulic power units, roller adjustment systems, drive mechanisms, and safety guarding subsystems.
5. Final Assembly -- Complete integration of the vertical machine structure, multi-roller system, electrical control cabinet, and automation devices on our production line.
6. Electrical & PLC Integration -- Installation and programming of the PLC control system with HMI interface for precise roller angle, gap adjustment, and automatic operation.
7. Trial Run & Testing -- Every machine undergoes full-load testing to verify straightening speed, precision (straightness ≤0.8 mm/m), stability, and surface quality of test samples.
8. Quality Inspection -- Final comprehensive inspection by our quality control team ensures compliance with ISO9001 standards and customer specifications.
9. Packaging & Shipment -- Machines are securely packaged for international shipping, with containerization and export documentation.
Quality Control Commitment
With over two decades of manufacturing experience, FangRong maintains an uncompromising commitment to quality. Our ISO9001:2015-certified quality management system ensures that every machine leaving our factory meets the highest standards of precision, reliability, and safety.
FangRong Precision Machinery holds multiple international certifications and intellectual property rights that attest to our commitment to quality, safety, and innovation:
ISO9001:2015 Quality Management System Certification
Our quality management system is certified to ISO9001:2015 standards (Certificate No.: UQ231211R1). This certification demonstrates our commitment to continuous improvement, customer satisfaction, and consistent product quality across all aspects of our operations---from design and procurement to manufacturing and after-sales service.
CE Certification
Our machines comply with the European Machinery Directive 2006/42/EC, bearing the CE mark. CE certification confirms that our equipment meets the essential health, safety, and environmental protection requirements for the European market, including two-hand controls, safety light curtains, and interlocked guards.
SGS Certification
The SGS report verifies key performance indicators such as straightening precision, operational reliability, noise levels, and safety protection features. It demonstrates that the equipment complies with relevant CE, ISO, and industry safety requirements, providing customers with greater confidence in product quality and compliance.
National Patent Certificates
FangRong has been awarded over 130 patents, including 32 invention patents and more than 100 utility model patents. These patents protect our proprietary technologies in hydraulic systems, die design, automation control, and machine structure. Representative patent numbers include:
- 2013207829011
- 2008300532117
- ZL2015 2 0842922.7
Our robust intellectual property portfolio reflects our deep commitment to research, development, and technological innovation in the straightening industry.
A: Utilizing the multi-roll reverse bending straightening principle, it achieves high straightness requirements and meets most precision standards for industrial processing.
A: The vertical design occupies less floor space, making it suitable for workshops with limited space; materials move vertically, facilitating easy loading and unloading, and is particularly ideal for continuous straightening operations involving long materials.
A: Use reliable drive systems and multi-roll configurations; the roller system is made of wear-resistant materials and can be customized according to material properties.
A: The speed can be adjusted via frequency conversion, meeting varying production demands with high efficiency.
A: It supports integration with systems such as automated loading/unloading and online inspection to enable intelligent production lines.
A: Equipped with a smart control system and a user-friendly interface, it can be operated with minimal training, typically requiring only a small number of personnel.
A: Focus on lubrication, accuracy inspection, and cleaning of the roller system. Overall maintenance is straightforward, resulting in lower long-term operating costs.
A: The price varies depending on factors such as configuration, specification range, and level of automation. Please provide your specific processing requirements, and we will provide a customized quote.
A: The standard configuration has a moderate delivery timeframe; customized equipment requires slightly longer time, which can be adjusted based on specific requirements.
A: Yes, we offer comprehensive customization, allowing design and adjustments based on customer site conditions, material properties, and specific process requirements.
A: We offer a standard warranty period and provide lifetime technical support. Our professional after-sales team offers installation assistance, remote guidance, and regular follow-up services.
A: We offer a variety of flexible payment options and can provide all necessary documents and materials required for exports.
A: We recommend providing details such as material type, primary processing specifications, target production capacity, workshop space, and power supply conditions to help us recommend the most suitable model and configuration.
A: We can provide operation videos, layout designs, and customer case studies. If needed, we can arrange a factory visit or further assistance.
Address
NO.163,Shatong Road,Shabu 2nd Industrial Zone, Dalang Town, Dongguan City, Guangdong, China
