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Ventilation System Manufacturing Process

Release time：2026-03-10

The manufacturing of ventilation systems centers on structural shaping, impeller dynamic balancing, casing sealing, and complete machine commissioning. Through precise material cutting, welding and forming, stress relief treatment, precision machining, static and dynamic balance correction, and rigorous testing, we ensure that the product operates smoothly, delivers stable airflow, maintains low noise levels, and boasts reliable strength—meeting the long‑term operational requirements of industrial ventilation and environmental protection applications.

I. Design and Process Preparation

Based on the core operating conditions (air volume, air pressure, medium characteristics, etc.), complete 3D modeling and structural optimization of the entire machine, clearly defining the processing procedures for each stage, the key inspection points, and the core acceptance criteria. Select high‑quality materials that are well suited to the operating conditions (such as Q355B, 16Mn, 42CrMo, etc.). All materials must be accompanied by official material certifications and mechanical performance reports; critical materials shall undergo individual physicochemical re‑tests. During storage, ensure proper protection against moisture, rust, and impact damage, and strictly prohibit the use of non‑conforming materials in production.

2. Precision Manufacturing of Core Components

1. Power Core: Precisely cut and fabricate materials according to the design drawings, strictly controlling dimensional deviations and removing burrs after cutting; perform precise shaping on the blades to ensure that their curvature and angles meet the specified standards, followed by final trimming and correction after forming; carry out precision machining of the connection areas to guarantee mating accuracy; after assembling the blades with the connection components, conduct standardized welding, followed by grinding and finishing. Only after non‑destructive testing confirms the absence of defects such as slag inclusions and porosity can the component proceed to the next process.

2. Housing Components: After cutting the materials according to the drawings, proceed with forming operations to ensure that the housing contours are neat and the flow channels are smooth. Perform standardized welding on the longitudinal and circumferential seams of the housing, and promptly carry out stress-relieving annealing after welding to effectively eliminate residual welding stresses and prevent deformation or cracking during subsequent use. Precisely machine the flange surfaces and sealing grooves, strictly controlling flatness and dimensional accuracy to guarantee reliable assembly and optimal sealing performance.

3. Core Transmission Components: High‑quality forged parts are selected and subjected to heat treatment processes such as normalizing and tempering, significantly enhancing their toughness and strength to ensure they meet long‑term transmission requirements. The core transmission components undergo precision machining to control critical dimensions, roundness, and surface roughness. After machining is complete, a comprehensive ultrasonic inspection is carried out to ensure that there are no internal defects such as porosity or cracks; only components that pass inspection are then forwarded for assembly.

3. Complete Machine Assembly

First, pre‑assemble the core components—including the power core, transmission core, and housing parts—then meticulously inspect the fit accuracy of each component, identifying and addressing potential issues such as assembly deviations and loose parts. Precisely adjust the assembly clearances to meet the design specifications. During final assembly, further calibrate the mating positions of the core components, strictly controlling the clearance ranges at critical locations. Perform dynamic balancing on the power core and transmission core assemblies (achieving a precision level of G4.0), effectively reducing operating vibration and noise. Rigorously control the sealing assembly process to ensure that the entire machine is completely leak‑proof. After assembly is complete, conduct a preliminary trial run to verify smooth operation without any abnormalities.

4. Performance Testing and Factory Inspection

Complete the two core tests—no-load and load—according to relevant standards. The no-load test evaluates indicators such as operational stability, vibration, noise, and component temperature rise, while the load test simulates actual operating conditions to assess core performance metrics including air volume, wind pressure, and operating efficiency, ensuring that all indicators meet both design specifications and industry standards. Conduct a comprehensive reinspection of the entire unit’s appearance, dimensions, and performance; compile all inspection reports, material certificates, and non‑destructive testing reports; and issue a product certificate of conformity. Perform rust removal and anti‑corrosion treatment on the entire unit, apply a specialized protective coating, and ensure moisture‑proof and shock‑resistant packaging to prevent damage during transportation—only units that pass these inspections may leave the factory.

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