Abstract
In this study, a tension extension spring fatigue machine was designed and manufactured. The force applied by jaws were driven by pneumatic piston. The air pressure is 6 bar that acquired from local pneumatic network. The maximum force was designed to meet at least 12 kN. Thereby, multiple quantity of extension springs can be tested simultaneously. The applied force can be adjusted pneumatic air pressure adjuster. The fatigue cycles were controlled by an electronic circuit. The machine is also designed to complement desired number of fatigue cycles. For this reason, a counter was also added to controller. Manufacturing of the machine elements and its tolerances were also described in detail.
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