Spindle Speed Optimization in Caulking Process to Improve Shock Absorber Quality

The caulking process is one of the crucial stages in the manufacturing of shock absorbers, particularly in the front suspension of motorcycles. One of the main parameters in this process is the spindle speed of the Inner Tube Caulking (ITC) machine, which plays a vital role in forming and locking the components to prevent oil leakage and component displacement during operation. This study aims to analyze the effect of spindle speed variation on the quality of the caulking results, including visual appearance, bonding strength, and oil leakage performance. The methodology employed includes direct observation on the production line, data collection of process parameters, and product quality testing using leakage and strength tests. The analysis results indicate a significant relationship between spindle speed and caulking quality, where excessively high or low speeds may lead to defects such as imprecise surfaces, excessive deformation, or insufficient joint tightness. The recommended optimal spindle speed range achieves a balance between productivity and product quality. Proper parameter control can enhance suspension quality and reduce the number of defective products on the production line.