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<p>In rotor manufacturing for Roots pumps, precision and production time are critical. When a rotor shaft has two stages with claw-type and Roots profiles, traditional forming methods are unsuitable for the Roots rotor (RR) stage. Instead, shaping or end-mill milling methods are used, though they are time-consuming. This study proposes a novel method using a conical milling cutter (CMC) to reduce production time and improve precision. The contact points and meshing angles between the RR and CMC are calculated based on contact conditions. A 3D CMC surface is created using the cutter profile, ensuring no undercutting occurs during the rotor cutting process. The cutting process is then refined to enhance rotor precision. Normal deviations between the experimental and theoretical rotor profiles are analyzed, and the experimental results demonstrate the effectiveness and innovation of the proposed method.&#xa0;</p>

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An improvement for experiment of manufacturing Roots pump rotors by conical milling cutter

  • 期刊论文

  • 发表日期：

    2025年3月21日

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  • Van-Quyet Tran

摘要

In rotor manufacturing for Roots pumps, precision and production time are critical. When a rotor shaft has two stages with claw-type and Roots profiles, traditional forming methods are unsuitable for the Roots rotor (RR) stage. Instead, shaping or end-mill milling methods are used, though they are time-consuming. This study proposes a novel method using a conical milling cutter (CMC) to reduce production time and improve precision. The contact points and meshing angles between the RR and CMC are calculated based on contact conditions. A 3D CMC surface is created using the cutter profile, ensuring no undercutting occurs during the rotor cutting process. The cutting process is then refined to enhance rotor precision. Normal deviations between the experimental and theoretical rotor profiles are analyzed, and the experimental results demonstrate the effectiveness and innovation of the proposed method.