Results 141 to 150 of about 1,963 (175)
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Grinding of highly accurate hourglass worm gears — trial manufacture of the worm grinding device
Precision Engineering, 1990Abstract Highly accurate worm gears can be effectively used as an angle standard. Wildhaber worm gearing is a kind of hourglass worm gearing, which owing to its geometrical simplicity, can have its worm and worm wheel easily finished and accurately measured. This study describes a precision grinding method of the Wildhaber worm. A hobbing machine can
T. Oiwa, K. Kobayashi, A Toyama
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The Research of Enveloping Hourglass Worm Modeling Accuracy Based on CREO
Applied Mechanics and Materials, 2014For hourglass worm three-dimensional modeling, in the Process that Using MATLAB software Calculating the Generated * ·ibl files and leading-in Pro /E software comply hourglass worm three-dimensional modeling, MATLAB Calculate Generated Worm spiral curve, Cusp and Broken line appears, when * ·ibl file mixed border leading-in Pro /E software Worm tooth ...
Shou An Chen +3 more
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A Study on Hourglass Worm Gearing with Constant Slide-Roll Ratio
Journal of Mechanical Design, 1979A new type of hourglass worm gearing is developed by the authors’ own theories [1], [2]. This hourlgass worm gearing has the good points of Hindley’s one and also covers the weak points of it. The worm is cut by a tool with straight-lined cutting edge which is fixed to the basic member [1].
T. Sakai, M. Maki, H. Tamura
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A Method to Generate the Spiral Flutes of an Hourglass Worm Gear Hob
Journal of Mechanical Design, 2018All of the cutting edges on an hourglass worm gear hob have different shapes and spiral angles. If the spiral angles are small, straight flutes are typically adopted. However, for hobs with multiple threads, the absolute values of the negative rake angles on one side of the cutting teeth will greatly affect the cutting performance of the hob if ...
Jie Yang +4 more
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A General Modification Theory for Double-Enveloping Hourglass Worm Drives
Key Engineering Materials, 2011A universal modification theory is developed for all kinds of hourglass worm drives, no matter what shape the generating surface of the worm is. Based on the theory established, toroidal worm drives can be classified into two main categories: with singular points and without singular points.
Ya Ping Zhao, Tian Chao Wu
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A novel specific four-axis linkage method for processing the hourglass worm
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2019To improve the flexibility of hourglass worm processing equipment, a specific four-axis linkage method for processing hourglass worm, which is called CZXB method, is presented in the paper. Based on the forming principle of the hourglass worm, machining principle and the traditional processing method were elaborated in detail.
Xinyang Qiu +3 more
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Research on Measuring Key Errors of Plane-Generated Enveloping Hourglass Worm
Advanced Materials Research, 2014Plane-generated double enveloping hourglass worm pair has unique characteristics of double contact line; it has the advantages of wide tooth working area, large bearing capacity, and long service life, etc. However, its development has been restricted by such factors as difficulty in measuring, worse processing precision, etc.
Hong Lu, Zhi Liu
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Determination of the Most Dangerous Meshing Point for Modified-Hourglass Worm Drives
Journal of Mechanical Design, 2013A type of modified-hourglass worm gear drive, frequently called type-II worm gearing for short, has various favorable meshing features. Its sole shortcoming is the undercutting of the worm wheel. By adopting a slight modification, this problem can be overcome due to the removal of a part of one subconjugate area containing the curvature interference ...
Yaping Zhao, Yimin Zhang
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Determination of the Most Dangerous Meshing Point for Modified Hourglass Worm Drives
Volume 8: 11th International Power Transmission and Gearing Conference; 13th International Conference on Advanced Vehicle and Tire Technologies, 2011A kind of modified hourglass worm drives, which is frequently called the type II worm gearing for short, has various favorable meshing features. Nevertheless, its sole shortcoming is the undercutting of the worm wheel. In the condition of adopting slight modification, this problem can be overcome due to the removal of a part of one sub-conjugate area ...
Yaping Zhao, Tianchao Wu
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Design and Assessment of an Antibacklash Single Roller Enveloping Hourglass Worm Gear
SAE Technical Paper Series, 2019<div class="section abstract"><div class="htmlview paragraph">A theoretical and experimental analysis is conducted to study the influences of key design parameters on the backlash of the roller enveloping hourglass worm gear. Two equations, the gear engagement equation and the tooth profile equation have been derived and represented in ...
Xingqiao Deng, Yucheng Liu, Ge He
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