Explore the first range of our high-precision forming machinery, CNC lathes, and heavy-duty industrial auxiliary equipment tailored for critical components.
In modern high-precision industrial fluid dynamics and ventilation frameworks, the geometry of a Venturi tube and the aerodynamic optimization of funnel-shaped inlets represent the difference between system efficiency and catastrophic failure. Zhejiang ZRF Spinning Co., Ltd. has established itself as the leading technical vanguard in the design, engineering, and execution of high-capacity CNC spinning machine tools. By leveraging advanced metal spinning (flow forming) processes rather than traditional stamping or deep drawing, ZRF empowers international enterprises to achieve unmatched structural integrity, perfect surface finishes, and zero-defect wall thickness consistency.
Traditional manufacturing of converging-divergent tubes and axisymmetric funnels often involves welding multiple pre-formed segments together. This legacy method introduces HAZ (Heat-Affected Zones) which degrade physical performance and cause fatigue under structural vibrations. Through the utilization of ZRF's advanced CNC double-roller metal spinning machines, raw circular sheet metal blanks or pre-formed cylindrical shells are seamlessly spun over precision-machined mandrels. The resulting product is characterized by seamless construction, high tensile strength, and superior dimensional tolerances.
As a high-tech enterprise specializing in the research, development, and manufacturing of CNC spinning machine tools, Zhejiang ZRF Spinning Co., Ltd. has extensive experience and a strong technical foundation in the domestic and global spinning industries. ZRF's focus on continuous technological innovation has positioned it at the pinnacle of specialized machining systems, pioneering research in double-roller shear spinning, flow forming, and custom machine tool configurations.
Our series of CNC spinning machine tools are widely applied across a variety of demanding industries, including petrochemicals, electronics, daily hardware, food processing machinery, automotive and motorcycle components, pressure vessels, ventilation and environmental protection, defense, and aerospace. The ZRF spinning machine series has reached more than 30 provinces and cities across China and has been exported to over 20 countries and regions worldwide. Our advanced technology, excellent product quality, and comprehensive service system have earned the trust and recognition of users globally.
At Zhejiang ZRF Spinning Co., Ltd., we firmly advocate a philosophy of market-oriented development, research-driven innovation, and technological excellence. We focus on continuous improvement in both product performance and service quality. Our manufacturing process strictly adheres to the ISO9001 quality management system, ensuring reliable, safe, and high-quality products. Over the years, we have established long-term cooperative relationships with many leading domestic and international enterprises.
Looking forward, Zhejiang ZRF Spinning Co., Ltd. will continue to leverage its deep technical expertise to strengthen its leadership in China’s spinning industry and expand its global presence. With a vision for the 21st century, full of opportunities and challenges, ZRF remains committed to excellence in innovation, quality, and service, striving to become a globally respected leader in spinning machine technology.
Understanding the deformation mechanics of metal spinning is essential for procurement managers who demand precise final wall thicknesses and zero structural micro-fractures. ZRF's CNC machinery utilizes two primary categories of spinning: Conventional Spinning and Shear/Flow Spinning. When applied to Venturi tubes and funnel inlets, these techniques are strategically combined.
| Forming Parameter | Conventional Metal Spinning | Shear / Flow Spinning (ZRF Optimized) |
|---|---|---|
| Mechanical Principles | Metal blank is bent progressively over the mandrel; thickness remains mostly uniform. | Metal is compressed axially between the roller and mandrel, following the Sine Law: $t = t_0 \cdot \sin(\alpha)$. |
| Wall Thickness Control | Variable, relies heavily on CNC toolpath coordinates. | Precisely reduced; optimized for high-pressure applications. |
| Applicable Materials | Al5052, Brass, Copper, Low-carbon Steel. | SS304, SS316, Titanium, Inconel, High-strength Carbon Steel. |
| Surface Quality (Ra) | 1.6 μm - 3.2 μm | 0.8 μm - 1.6 μm (Eliminates secondary finishing needs) |
| Production Velocity | Medium cycle times per piece. | High-speed, continuous single-pass deformation. |
During the flow forming of funnel-shaped inlets and convergent-divergent Venturi cones, ZRF machines precisely apply the Sine Law of Shear Spinning. The wall thickness ($t$) of the formed cone section is calculated from the initial blank thickness ($t_0$) and the half-angle of the cone ($\alpha$). The CNC controller coordinates the horizontal and radial feed rates of the double rollers in real time, preventing structural thinning or wrinkling at extreme angles where the slope changes dynamically. This is crucial for Venturi nozzles, where gas or fluid flow relies on exact internal dimensional curves to establish high-velocity pressure drops without turbulence.
To assure perfect product outcomes, ZRF’s programming software executes Finite Element Analysis (FEA) to simulate stress distribution and potential cracking zones before launching physical production. The CNC toolpaths are auto-generated and calibrated for roller radius compensation, ensuring high repeatability (±0.05mm) across production runs of 10,000+ pieces.
Where ZRF CNC Venturi Tube and Funnel forming machinery makes the critical difference.
High-capacity exhaust fans and axial cooling systems require bellmouth inlet funnels to minimize air intake noise and maximize volume efficiency. Seamless, spin-formed fan housings prevent vibration resonance and drag losses.
Aerospace rocket nozzles, combustion chambers, and convergent-divergent thruster outlets demand materials like Titanium and Inconel. ZRF's heavy-duty CNC spinning machines withstand the high yield stresses required to form these alloys.
Venturi tubes serve as inline flow meters for critical oil, gas, and chemical lines. With zero welded joints in the throat area, ZRF formed Venturi tubes eliminate corrosion risk and comply with high-pressure safety standards.
From alloy wheel rim flow forming to lightweight stainless steel catalytic converter shells, our machines deliver precise concentricity and wall-thickness control to support high-volume automotive production.
Zhejiang ZRF Spinning Co., Ltd. maintains a vertically integrated manufacturing facility in China. Every step of our production—from base frame casting and precision guideway grinding to CNC software programming and final testing—is handled internally. This comprehensive approach isolates our production schedule from external supply chain disruptions and ensures high reliability for overseas buyers.
Our workshop utilizes premium machine tools (laser cutters, guideway grinders, universal grinders) to build spinning equipment that delivers long-term thermal stability and structural rigidity. Our standard manufacturing workflow is detailed below:
Purchasing capital CNC machinery requires strict adherence to technical parameters, compliance certifications, and machine longevity. ZRF supports global engineering departments by providing complete transparency for technical inquiries:
Our quality control program follows a 5-step validation process, starting with raw material chemical testing and culminating in a continuous 72-hour dry-run and load test before shipment. We provide complete material certification sheets, geometric test records, and video run-throughs to customer engineers before the machine leaves our factory floor.
Operating CNC machinery internationally requires reliable local support and compliance with regional safety codes. Zhejiang ZRF Spinning Co., Ltd. provides the following services to ensure smooth integration into overseas production facilities:
Our export-grade machines feature safety light curtains, fully enclosed workspace shielding, safety interlocks, and emergency stop circuits that comply with European CE directives and OSHA safety codes.
ZRF field service engineers assist with foundation inspection, mechanical leveling, hydraulic calibration, and custom path programming directly at your facility.
Equipped with secure industrial VPN modules, our software support team can remotely diagnose CNC systems, debug PLC code, and adjust path coordinates to minimize system downtime.
Direct, engineering-focused answers regarding CNC metal spinning and forming machines.
Our heavy-duty double-roller CNC spinning series can form mild carbon steel blanks up to 15mm thick, stainless steel (SS304/SS316) up to 10mm, and aluminum/copper alloys up to 20mm. These capacities depend on the machine model, spindle power, and hydraulic force configuration.
Deep drawing requires high-pressure hydraulic presses and expensive matched die sets, which is cost-effective only at very high volumes. CNC flow spinning uses a single mandrel and roller toolpath. This lowers tooling costs and allows for easier adjustments to wall thickness and design variations.
Yes. Our machines are designed with high-torque spindles and heavy-duty hydraulic roller systems capable of forming titanium, Inconel, and duplex stainless steels. These alloys often require hot-spinning configurations, which can be integrated with our programmable heating attachments.
We use precise dual-axis toolpath programming and closed-loop hydraulic force feedback. The CNC system monitors real-time deflection forces and adjusts the roller positions to ensure uniform material flow and consistent wall thickness across variable angles.
We supply Siemens SINUMERIK or Fanuc CNC controllers as standard options, customized with ZRF's proprietary metal spinning interface. This allows operators to program paths via CAD/CAM import or directly on the shop floor using conversational inputs.
Browse our selection of heavy-duty hydraulic spinning systems, non-standard custom components, feeding systems, and specialized alloy wheel lathes.
ZRF Spinning