The importance of factors affecting fatigue strength, such as notches and surface roughness, and their countermeasures.
[Reproduction of Private Spring Preparatory School Lecture 19] Notches reduce both static strength and fatigue strength! The scary part is the notches that are like bacteria, which are hard to see.
Last time, we studied that if we know the tensile strength of a material, we can estimate the approximate fatigue limit, and that this fatigue limit cannot be used as is. From this time onward, we will explain the factors that influence fatigue strength for a while. Have you encountered any mechanical parts in your daily handling that have broken due to fatigue failure, as we have studied so far? Please pay attention to where the starting point of fatigue cracks is. Usually, don't they start from places like keyways, oil holes, threads, abrupt changes in cross-section, or welds? *You can view the detailed content of the article in the PDF. For more information, please feel free to contact us.
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*You can view the detailed content of the article in the PDF. For more information, please feel free to contact us.*
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Accurate offers a wide range of products including compression springs, extension springs, torsion springs, wire forming, battery springs, and flat springs in the Ultra Spring (Accurate Original standard spring) series, as well as custom-made items and both wire and sheet materials. We are capable of manufacturing and selling these products. Additionally, we have permanent showrooms for springs in Akihabara, Nagoya, and Kyoto. We maintain a constant stock of catalog items, including Ultra Springs, enabling immediate delivery. Currently, Ultra Springs has approximately 3,000 different items, all with manufacturing lot numbers for traceability, and we promote the industry's first two-point load management and no discontinued items, striving for quality and supply stability to expand globally. Our free spring selection and design software, "Select Spring-kun," allows for easy selection of Ultra Springs, spring design, lifespan calculations, estimates, and delivery date confirmations. The Accurate Tangless Insert reduces the work time of conventional products (Heli-Coil) to one-sixth, and is a NAS-certified revolutionary product that achieves cost reduction for screw hole operations in aluminum cutting and resin materials, particularly in the aerospace and aviation industries, as well as high-speed rail and semiconductor manufacturing equipment, and medical devices.