Helical bevel gears have inclined or twisted teeth on a conical surface and the common types are skew, spiral, zerol, hypoid gears. However, this study does not include Due to geometric complexities of gears, commonly used methods in their design based concept equivalent virtual spur gear. The approach paper is following assumptions, a) helix angle helical equal mean spiral angle, b) pitch diam...

Line-structured laser sensors used in gear measuring provide a new way to acquire the perfect 3-D information of complicated tooth flank with modification. This method leads series problems, such as incident light occlusion, multiple reflection, system calibration and so on. The occlusion poses severe problem on integrity data acquired by line-structured sensors. To understand influence during ...

Load-sharing among the teeth of involute splines is little understood. Designers typically assume only a fraction of the teeth are engaged and distribute the load uniformly over the assumed number of engaged teeth. This procedure can widely overor underestimate tooth loads. A new statistical model for involute spline tooth engagement has been developed and presented earlier, which takes into ac...

Tooth loss is a cause of decreased masticatory function that affects the oral cavity and general health in elderly. The elderly was expected to have at least 20 working teeth, meaning masticatory, aesthetic speech functions were considered normal, although less than 32 teeth. This study aims determine relationship between dental with number functioning teeth Hargo Dedali Nursing Home Surabaya. ...

The cutting teeth on PDC bits have been working under wear for a long time, but the understanding of their rock breaking mechanism is not deep enough. In this paper, influence key factors such as height, passivation type, invasion depth, lithology, rake angle and tooth diameter load distribution edge, well equivalent plastic strain form section, are investigated by means numerical simulation. r...

In this paper, a novel line gear mechanism is proposed; it called the variable shaft angle (VSALGM). VSALGM has two rotational degrees of freedom, one rotation gears with constant transmission ratio, and other relative swing shafts. First, contact model composed driven curve driving teeth working surface (DLTWS) was proposed. With concept, basic design equations for were derived on basis space ...

To improve the load characteristics of transmission error for helical gears, a gear made laminated materials is proposed. The has three layers in which metals with different rigidities are tooth width direction. on both sides from same metal, and metal used central layer. A theoretical analysis was performed to investigate effects arranging high- low-rigidity changing conventional homogeneous m...

  This study aimed to design a bycatch reduction device (BRD) for shrimp beam trawl, which is manufactured by flexible materials to reduce bycatch for the gear in the South Sea of Korea. The model test was carried out to understand the shape of the gear in the water and to measure the variation of flow speed due to the BRD in a circulating water channel. Catches were compared between a shrimp b...

Application of the high-frequency acoustic emission (AE) technique in condition monitoring of rotating machinery has been growing over recent years. This is particularly true for bearing defect diagnosis and seal rubbing (Mba et al., 1999, 2003, 2005; Kim et al., 2007; Siores & Negro, 1997). The main drawback with the application of the AE technique is the attenuation of the signal and as such ...