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Gear Cutting Tools for Machining Bevel Gears
Published in Stephen P. Radzevich, Gear Cutting Tools, 2017
Cutting tools for machining straight bevel gears are designed so that rake angle is in the range of γo = 10°–25° depending on the work material. Standard gear cutting tools have a rake angle of γo = 20°. The lateral cutting edge is at the set angle β = 12°. Its orientation is also defined by the profile angle ϕc of the cutting tool. Because the set angle is β = 12°, an appropriate clearance angle is created. The clearance angle at the top cutting edge is equal to αo ≡ β = 12°.
Modeling of contact load distribution of planetary threaded roller bearing based on deformation coordination
Published in Mechanics Based Design of Structures and Machines, 2023
Jianan Ni, Jihui Yin, Dandan Li, Jiuqing Liu, Zhijie Xie
Figure 3(a) exhibits the force transmission path and threaded contact form based on the installation mode of PTRB shown in Figure 2(a). Notably, the profile of the roller thread is convex arc, and the threads of the inner and the outer rings are standard triangular threads; therefore, the contact between the roller and the inner or outer rings can be equated to the point contact between the equivalent ball and the raceway. Consequently, the contact zone between the roller threads and the inner or outer ring threads can be equated to the same number of equivalent balls those in contact with the raceway. All the equivalent balls and the corresponding thread teeth are numbered from the loading end face of inner ring. Fa is the external axial force load acting on the PTRB; Fsi and Fni are the internal axial force at the ith thread tooth of the inner ring and outer ring, respectively; Qi is the normal force on the ith equivalent ball from the loading side, and β denotes the profile angle of the threaded tooth.
Research on design method of Hy–Vo silent chain system for multi-phase transmission
Published in Mechanics Based Design of Structures and Machines, 2021
Yabing Cheng, Wang Gao, Huan Liu, Junyue Zhang, Yang Li
The meshing relations of Hy-Vo silent chain plate- sprocket-tools are shown in Fig. 3. The phase difference of each phase sprocket is and the number of teeth is z. The thick solid line is the tooth of first phase sprocket. The thin solid line is the tooth of second phase sprocket and its pitch is . The dotted line is the tooth of third phase sprocket and its pitch is . Half of the profile angle of chain plate is and the basic pitch is Supposing the Hy-Vo silent chain initial pitch is and initial apothem is The normal profile angle of the sprocket is and is the normal pitch.
Comfort and energy performance analysis of different glazing systems coupled with three shading control strategies
Published in Science and Technology for the Built Environment, 2018
Anna Maria Atzeri, Andrea Gasparella, Francesca Cappelletti, Athanasios Tzempelikos
Open-closed shading operation does not necessarily ensure a comfortable environment while it has a significant impact on daylight availability. Strategy CTRL2 determines an intermediate position that depends on the solar position. In particular, the height (hsh) of the shades above the workplane is calculated with Equation 3, where D is the distance from the window and Ω is the solar profile angle of the considered position. The solar profile angle Ω is a function of the solar altitude α (the angle on a vertical plane between the sun's rays and the horizontal plane) and the surface solar azimuth γ (the angle on a horizontal plane between the normal to the vertical surface and the solar azimuth):