logo
Introduction
Theft-proof door hinges are an important component in ensuring the security of a building. However, over time, the hinge may become stiff or squeaky, leading to difficulty in opening and closing the door. Lubrication is one of the most effective methods in reducing friction and improving the performance of the hinge. This research aims to investigate the lubrication and friction characteristics of theft-proof door hinges.
Methodology
1. A sample of theft-proof door hinge was obtained and cleaned thoroughly.
2. The hinge was then placed in a testing machine and subjected to a load of 50N.
3. The friction force was measured using a load cell and a displacement sensor.
4. Different lubricants, including grease, oil, and dry lubricants, were applied to the hinge.
5. The friction force was measured again with each lubricant.
6. The hinge was then subjected to 10,000 cycles of opening and closing to simulate real-life usage.
7. The friction force was measured again after the cycles.
Results
The results showed that all lubricants reduced the friction force of the hinge compared to the unlubricated hinge. However, the type of lubricant used had a significant impact on the friction reduction. Grease and dry lubricants were found to provide the best lubrication and significantly reduce the friction force. Oil was less effective in reducing friction. After 10,000 cycles, the friction force of the hinge increased, but the lubricated hinge still had a lower friction force than the unlubricated hinge.