汽车起动齿轮轴的精密塑性成形 by 孟令先, 马建民, 宋学进, 张元国

“…The start gear shaft is the key part of automobile starter,it is involutes small module internal gear with addendum modification;tooth surface of the internal gear is complex shape of five pleats.It is step shaft with H/D>6 in the outline.The shaft can’t be machined and plastic forming also is difficult.Meeting the needs of markets and improving comprehensive function of automobiles,the high efficiency precision forming technology method of single-step chinless-forming for internal gear tooth surface and external gear tooth is put forward based on analysis,study and repeated test.In the same time,a set of high accuracy die with simple novel structure and long service life is designed and manufactured.The advantages of the method have been verified that utilization ratio of material and production efficiency is high.For this reason,the method is profitable reference for producing the same type of complex shape gear.…”
Get full text

无轴向进给齿轮磨削运动及其蜗杆砂轮形状分析 by 张学成, 李春光

“…According to the principle of spatial skew axis helical gearing with instantaneous straight line contact,a new type worm gearing could be formed.A new gear grinding way without axial feeding based on the principle of the worm gearing,and how to make up the machine,motions needed in the machine and relationship of the motions are dissertated.How to adjust the machine,how to design the shape of the worm grinding wheel are described.The theoretical analysis results indicate that it’s possible to grind gears with the worm grinding wheel without axial feeding by the right and proper design,and one or double tooth surfaces could be grinded exactly.Non-axial feeding,simple structure,and higher efficient are the remarkable features of this technology.…”
Get full text

基于Inventor的圆柱蜗杆参数化设计 by 乔永钦, 杨顺成, 罗登峰, 牛怡

“…The most of normal cylindrical worm tooth is machined by using straight lines forming tool.As the different installation positions of the tool,the tooth profile shape of the resulting helicoidal surface in the different sections is also different.By using the 3D solid modeling software of Inventor,the process of the straight lines lathe tool cutting worm is simulated,according to the different of installation position of the tool,the different type of cylindrical worm is gotten.The parametric design of worm is realized,the duplication labor of designer is reduced and the efficiency is improved.…”
Get full text

多级NGW型行星齿轮传动的设计 by 洪雷, 李学明, 王进戈

“…The characteristics of NGW planetary gear sets widely used in WTGs are introduced.With the design of pitch reducer for 1.5 MW WTGs,some of the key design principles and general experienced conclusions for the important and difficult points of multi-stage planetary gear transmission are given.Gear tooth strength of the weak stage is analyzed and the tooth face shape is optimized by the application of virtual prototyping tools Romax Designer.By the use of uniform load mechanism,the efficiency of the multi-stage planetary gear transmission is improved.Furthermore,the reasonability of design is proved by the prototype testing.…”
Get full text

A Collaborative Design Method for the Cylindrical Gear Paired with Skived Face Gears Driven by Contact Performances by Zhenyu Zhou, Yuanyuan Zhang, Mou Li, Yuansheng Zhou, Zhongwei Tang, Jinyuan Tang, Liang Zhou

“…Skiving is an efficient method for manufacturing face gears, but theoretical machining errors may occur when face gears designed for shaping or grinding are processed by skiving. …”
Get full text

Design and Simulation Study of Structural Parameters of Bionic Cutters for Tea Harvest Imitating <i>Aeolesthes induta</i> Newman by Yuanqiang Luo, Junlin Li, Song He, Weibin Wu

“…The cutter of the hand-held tea picker is the key cutting component in the efficient tea harvesting process. In order to solve the problems of large cutting resistance and uneven incision during tea picking, this study fully applied the bionics principle to combine the excellent cutting performance of <i>Aeolesthes induta</i> Newman’s mandibles with the tea cutter, which extracted and fitted the tooth profile structure curve of the upper edge of the <i>Aeolesthes induta</i> Newman’s mandibles. …”
Get full text

基于UG的渐开线斜齿圆柱齿轮参数化设计 by 王书贤, 汪云, 邓利军, 张王进

“…Parametric design is to use parameters to describe sizes of parts.When the part is designed,the shape of parts is changed by modifying characteristic parameters to achieve the sizes to drive the graphics.Cylindrical involute helical gear is a part of mechanical drives in common use,because of its complex tooth profile,it is difficult to carry out parametric design.The sizes of model and the characteristic parameters are correlated by setting up relational expression,the model of cylindrical involute helical gear are generated accurately.A new gear is generated rapidly by modifying gear characteristic parameter in expression, parametric design of involute helical gear is realized,so efficiency and precision of gear design is raised greatly.…”
Get full text

CHANGES OF THE HYGIENE AND PERIODONTAL INDEXES SOON AFTER THE MANAGEMENT OF CHRONIC HYPERTROPHYC GINGIVITIS IN THE ORTHODONTIC PATIENTS TREATED BY BRACKET TECHNIQUE by A.D. Babenko

“…The patients noticed improvement on general well being and absence of halitosis after 3 month since the treatment as well as better gingival appearance and shape of the interdental papilla, decrease of gingival bleeding and sensitivity by tooth brushing. …”
Get full text

Samarium-doped hydroxyapatite: An effective approach for enhancing biomineralization in dental caries management by C.P. Harini, Radha Gosala, Ramya Ramadoss

“…MTT assay evaluated for biocompatibility and in vitro mineralization analyzed on human tooth samples. Results: SEM showed flake-like, and needle-shaped crystals. …”
Get full text

Bilateral Symmetry in the Aesthetic Area Achieved by Digital Smile Design on 3D Virtual Patient and Conventional Diagnostic Wax-Up—A Comparative Study by Maria Hristozova, Mariya Dimitrova, Stefan Zlatev

“…Gypsum models with wax-ups were digitized and superimposed onto the digital diagnostic design using 3Shape Dental Designer Studio software, Version 2023 (3Shape, Copenhagen, Denmark). …”
Get full text

PREVENTION OF POST-RESTORATION PAIN BY PROCESSING CARIOUS CAVITIES WITH WETTING AGENT by O.V. Lubchenko

“…It is connected both with functional properties of materials, their usability, possibility of full recovery of the anatomical shape of a tooth, and with the grown of aesthetic requirements of the patients. …”
Get full text

Micro-implant Uprighting cantilever for the correction of a severely rotated and angulated mandibular canine during clear aligner treatment by Noh Hyung-Kyu, Kim Ho-Jin, Park Hyo-Sang

“…Root movements and the rotation of a round-shaped tooth are known to be particularly challenging using clear aligners. …”
Get full text

Design and Performance Evaluation of a Self-Propelled Mugwort Harvester for Hilly and Mountainous Regions by Yi Li, Yongsheng He, Kai Zhang, Siqi Wang, Xinyu Hu, Junnan Chen

“…Key structural components, such as drum dimensions, tooth shapes, and tine arrangements, are developed, and a defoliation force model is established to identify factors influencing the net rate of mugwort leaf harvesting, impurity rate, and mugwort leaf usability. …”
Get full text

Trends and Application of Artificial Intelligence Technology in Orthodontic Diagnosis and Treatment Planning—A Review by Farraj Albalawi, Khalid A. Abalkhail

“…In total: 17 articles have reported on AI models designed for the automated identification of cephalometric landmarks; 12 articles on the estimation of bone age and maturity using cervical vertebra and hand-wrist radiographs; two articles on palatal shape analysis; seven articles for determining the need for orthodontic tooth extractions; two articles for automated skeletal classification; and 16 articles for the diagnosis and planning of orthognathic surgeries. …”
Get full text

THE NEED FOR IMPROVED METHODS OF PROSTHESIS DISTALLY UNLIMITED DEFECTS IN THE DENTITION by R. Kozak

“…If there is a one-sided final defect tooth, especially in the lower jaw, and at a young age in the dental system undergoes profound morphological and functional changes. …”
Get full text

Comparison of Fracture Resistance and Quality of Lateral Condensation Obturation in Traditional and Conservative Access Cavity Preparation: An <i>In Vitro</i> Study by Gurkiran Kaur, Purshottam Jasuja, Shveta Munjal, Heena Khurana, Ekta Gakhar, Suman Sharma

“…Introduction: Access cavity preparation is indeed a pivotal step in successful endodontic treatment. It ensures efficient removal of diseased or infected tissue, facilitates thorough cleaning, and enables effective shaping and sealing of the root canal system, therefore eventually giving favorable results of the treatment. …”
Get full text

Multi-scale conv-attention U-Net for medical image segmentation by Peng Pan, Chengxue Zhang, Jingbo Sun, Lina Guo

“…This enables the model to extract features of different shapes and scales adaptively, further improving its performance in complex scenarios. …”
Get full text

Diagnostic Accuracy and Agreement Between AI and Clinicians in Orthodontic 3D Model Analysis by Sabahattin Bor, Fırat Oğuz, Ayla Khanmohammadi

“…Three orthodontists independently measured all variables using 3Shape OrthoAnalyzer, and group means were used for comparison. …”
Get full text

Comparative Evaluation of Fracture Resistance of Teeth Instrumented by Self adjusting File, Protaper NEXT, and Hyflex EDM: An In vitro Study by DM Yashas, RS Basavanna, NM Dhanya Kumar, Aishwarya Arya, Poojitha Jain, Ishaan Adhaulia

“…ProTaper NEXT, although efficient in shaping, increased fracture risk due to higher stress generation. …”
Get full text

Particle correlated characteristics of coal rock crushed by disc cutters by XU Peng, LIU Chunsheng, CHENG Shuo, DANG Zhenqian

“…In the crushed body, the large coal rock was mainly in the shape of a flaky crescent, where crushed coal rock with a particle size longer than 8mm took up a high proportion. …”
Get full text