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Case Details

Planetary Roller Screw CNC Grinding High Precision Tray Lifting Screw Custom Turning

2025-09-11


Planetary Roller Screw CNC Grinding High Precision Tray Lifting Screw Custom Turning
Product Description

This case demonstrates the CNC machining process of tray lifting screws, utilizing hard turning and wheel grinding to address the challenge of long nut internal thread processing. High-precision grinders (e.g., P1 grade) control micron-level tolerances, ensuring nut tooth profile accuracy and surface finish for planetary roller screws, meeting the frequent start-stop demands of service robots.

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Machining Process
  1. Material Preparation: High-strength steel, forged and preliminarily heat-treated.
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  2. Rough Machining: CNC lathe cuts screw outer circle and nut blank, leaving grinding allowance.
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  3. Heat Treatment: Surface carburizing and hardening to enhance wear resistance.
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  4. Precision Grinding:
    • Screw Grinding: Thread grinder processes raceway, accuracy up to ISO grade 1.
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    • Nut Grinding: Internal thread wheel grinding, controlling tilt angle and pitch error (±3μm).
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  5. Inspection & Calibration: Smart detection system validates load accuracy and cycle life.
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Technical Highlights
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  • Process Innovation: Hard turning replaces grinding, processing efficiency increased by 50%, cost reduced by 20%.
  • Equipment Support: High-precision roller grinders handle screws up to 12m long.
  • Quality Control: Yield rate 99.7%, fully automatic precision calibration.
Application Cases
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  • Logistics AMR: Used in pallet lifters, supports 1,400kg load.
  • Medical Actuators: Drives hospital bed adjustment mechanisms.
  • Custom Projects: OEM design supported, solutions provided in 12 hours.