Under the downsizing trend of small-to-medium displacement passenger vehicle engines, turbocharger rotors—as core components—now require significant higher precision (typically at micron-level tolerances). Electron beam welding has emerged as a critical process for high-precision manufacturing due to its unique advantages.

With its "precision thermal management" and "ultra-high energy density" characteristics, EB welding optimally balances the conflicting demands of "high strength-lightweighting-low distortion" in compact turbo rotors. This technology is rapidly transitioning from premium to mainstream engine applications.

      1. Turbine shaft and wheel design: precise reproduction, consistent quality

High-precision blade scanning comparison and profile point fitting technology enable Jrone’s turbochargers to conform with original vehicle parts, guaranteeing turbocharger performance variation within ±3%.

              Scan Comparison-NG                                                 Scan Comparison-OK

      2. Advanced Turbine shaft and wheel manufacturing techniques and strict inspection

     1) British CVE vacuum electron beam welding + 100% online ultrasonic flaw detection

     Turbine shaft and wheel end face runout is controlled under 0.2mm so as to stabilize operation and reduce vibration and noise during the operation process, thus decreasing mechanical wear and extending components' life.

      2) Japanese OKUMA high-precision automatic grinding processing + 100% outer contour dimension inspection       

      Axial dimension is controlled at measurement points within ±0.02mm, ensuring efficient, stable, and consistent turbocharger performance, while also reducing the risk of Turbine shaft and wheel blade scraping failure.

To ensure efficient sealing, long-term and stable operation of the Turbine shaft and wheel, the ring groove is processed by grinding, and sealing ring groove roughness is controlled ≤Ra0.8. At the same time, the side runout of the sealing ring groove wall is no more than 0.01mm.

                                                            Grinding Schematic Diagram 

      3) German SCHENCK high-precision low-speed balancing machine combines material removal machine

      Initial imbalance of Turbine shaft and wheel welded by electron beam is controlled under 1g.mm to produce smaller material removal margin and greater guarantee of turbine shaft and wheel strength.

      4) Japanese TAKAHASHI Metal online single-piece cleaning method

      Zero chemical addition and cleanliness controlled under 1mg per piece make turbine shaft and wheel eco-friendly; By maximizing particle size ≤400μm, this cleaning method can reduce turbocharger bearing wear and extend turbocharger service life.