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Bevel gear transmission is characterized by strong load capacity, stable transmission, and compact structure. It is a key component in power transmission systems for vehicles, ships, machine tools, oil drilling equipment, aerospace, and other industries. Amid the rapid development of electrification, gears remain indispensable in mechanical systems. Bevel gears are typically machined using gear shaping or dual-cutter disk milling methods, which are efficient but require specialized machines, resulting in high procurement costs. These methods are also unsuitable for machining large gears or small-batch production. Inspired by the linear mechanism of the internal pendulum, this paper proposes a CNC machining method for straight bevel gears based on hypocycloid mechanisms. By leveraging the straight-line properties of hypocycloid motion, straight bevel gears are machined via milling or grinding on a five-axis machining center using the end-face hobbing method. This method transforms the traditional non-continuous machining into continuous indexing machining and enables CNC machining on a general five-axis machining center. This approach reduces the cost of specialized equipment and improves the efficiency of straight bevel gear manufacturing.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12006472 | PMC |
http://dx.doi.org/10.1038/s41598-025-96885-9 | DOI Listing |
Otolaryngol Head Neck Surg
June 2025
Departiment of Pediatric Otolaryngology-Head and Neck Surgery, Seattle Children's Hospital, Seattle, Washington, USA.
Objective: Use computational fluid dynamics (CFD) modeling to analyze airflow before and after slide tracheoplasty in a three-dimensional (3D) printed model of congenital tracheal stenosis and to compare surgical techniques.
Study Design: Comparative anatomic and physiologic study using 3D printed trachea models.
Setting: Tertiary children's hospital and mechanical engineering lab.
Sci Rep
April 2025
School of Mechanical Engineering, Tianjin University, Tianjin, 300354, People's Republic of China.
Bevel gear transmission is characterized by strong load capacity, stable transmission, and compact structure. It is a key component in power transmission systems for vehicles, ships, machine tools, oil drilling equipment, aerospace, and other industries. Amid the rapid development of electrification, gears remain indispensable in mechanical systems.
View Article and Find Full Text PDFMaterials (Basel)
January 2025
Dar Stal Dariusz Zaława, ul. Przemysłowa 7, 42-300 Myszków, Poland.
In this study, numerical modeling and experimental tests of the sheet metal cutting process were carried out in order to determine the shape of the cutting knives for a roller shear, ensuring the minimization of burr on the cut edge. A rolling mill was used for the tests, enabling the replication of the cutting process in a roller shear (demonstrating the possibility of using cutting rollers). The cutting edges of the sheets were examined using light microscopy and then compared with the results of numerical simulations to determine the cutting quality.
View Article and Find Full Text PDFBMC Oral Health
November 2024
Department of Prosthodontics, School of Stomatology, Guizhou Medical University, Affiliated Stomatology Hospital of Guizhou Medical University, Guiyang, Guizhou Province, 550004, China.
J Esthet Restor Dent
October 2024
Department of Prosthodontics, Faculty of Dentistry, University of Istanbul, Istanbul, Turkey.
Purpose: The purpose of the study was to investigate the influence of different preparation designs and scan patterns on the accuracy of intraoral scans for complete-arch maxillary laminate veneers.
Materials And Methods: Three maxillary typodonts were used to obtain reference models with three different laminate veneer preparation designs: windows (W), beveled (B), and incisal overlap (IO). Reference scans were obtained with a desktop scanner.