Bearing press in process problem

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SUMMARY

The forum discussion centers on a machine design issue involving the pressing of bearings into parts with tolerance rings. The application of Isopropyl Alcohol (IPA) is intended to minimize hard particle formation during the process; however, it causes the machine to jerk, leading to production rejects due to improper bearing height control. The machine utilizes a servo motor to drive a ball screw, applying a pressing force between 50 to 100 kgf. The jerking issue is directly linked to the use of IPA, prompting inquiries into whether the problem stems from the chemical properties of IPA or the machine's design.

PREREQUISITES
  • Understanding of servo motor mechanics and applications
  • Knowledge of ball screw drive systems
  • Familiarity with tolerance ring design and applications
  • Basic principles of chemical interactions in manufacturing processes
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  • Investigate the effects of Isopropyl Alcohol on material properties during pressing
  • Research alternative lubrication methods for bearing installation
  • Explore machine design modifications to mitigate jerking during operation
  • Learn about thermal expansion effects on bearing fits and installation techniques
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Manufacturing engineers, machine designers, and production managers involved in bearing installation processes and those seeking to optimize machinery performance in assembly lines.

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I am working in a project to design a machine to press in bearing into a part with tolerance ring.

IPA (Isopropyl Alcohol) is requested to apply on the tolerance ring before press in the bearing to reduce the hard particle created during the process.

However, the machine is jerking during the process. The bearing cannot be press in smoothly and causing our production reject due to the bearing height after press in cannot control properly.

This jerking only happen if IPA is applied. So is this due to the IPA chemical properties problem? Or my machine design problem?
My machine design is using servo motor to drive the ball screw. Pressing force is about 50 to 100kgf.

Hopefully someone can help me to solve this problem. Let me know if you need more details.

Thank you.
 
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Why not simply heat up the bearing housing slightly before pressing in the bearing? Have you double checked the fits on the bearing to make sure they are not too tight?
 

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