Results 21 to 30 of about 143,386 (239)

Performance Analysis of Gear Honing with Modified TI-Hourglass Worm Honing Wheel

open access: yesJixie chuandong, 2015
According to the theories of differential geometry and gear meshing,the basic equations for involute helicoids,meshinglines and meshing boundary lines are deduced.Then using MATLAB program,the contact lines and meshing boundary are drawn.The results show
Cai Weili, Zhang Mandong
doaj   +1 more source

Theoretical modeling and transmission characteristics analysis of a novel double-roller hourglass worm drive based on enveloping principle

open access: yesDiscover Mechanical Engineering, 2023
Traditional planar double-enveloping hourglass worm pairs have the characteristics such as the strong bearing capacity, high transmission efficiency and long life-span. However, the high relative sliding velocity and the serious agglutination or abrasion
Song Gao, Xiaolin Wang
semanticscholar   +1 more source

Mathematical model of the worm wheel tooth flank of a double-enveloping worm gear

open access: yesAlexandria Engineering Journal, 2021
This paper presents a novel method for determining the worm wheel tooth flank surface. The worm wheel model is developed according to the theory of gearing and the gear generation mechanism. Two cases are considered simultaneously.
Piotr Polowniak   +2 more
doaj   +1 more source

Thermal Elastohydronamic Lubrication Characteristics of Inclined Double-roller Enveloping Hourglass Worm Drive

open access: yesJournal of Physics: Conference Series, 2023
To grasp thermal elastohydrodynamic lubrication (TEHL) characteristics of the conjugating tooth-pairs of inclined double-roller enveloping hourglass worm drive in transmission process.
Jinkuan Li, Yujie Wen, Zaixin Liu
semanticscholar   +1 more source

Grinding of high accurate hourglass worm. Trial manufacture of worm grinding device.

open access: yesJournal of the Japan Society for Precision Engineering, 1988
High accurate worm gears can be effectively used as an angle dividing standard. Wildhaber worm gearing is a kind of hourglass worm gearing. Due to the geometrical simplicity, its worm and worm wheel can be easily finished and accurately measured. This study describes a precision grinding method of the Wildhaber worm.
Takaaki OIWA   +2 more
openaire   +2 more sources

The Generative Internet [PDF]

open access: yes, 2012
The generative capacity for unrelated and unaccredited audiences to build and distribute code and content through the Internet to its tens of millions of attached personal computers has ignited growth and innovation in information technology and has ...
Zittrain, Jonathan
core   +1 more source

Polymorphic organization in a planktonic graptoloid (Hemichordata: Pterobranchia) colony of Late Ordovician age [PDF]

open access: yes, 2012
Graptolites are common fossils in Early Palaeozoic strata, but little is known of their soft-part anatomy. However, we report a long-overlooked specimen of Dicranograptus aff.
Howe, Michael P.A.   +6 more
core   +2 more sources

Multi-Physically Programmable Tubular Origami Metamaterials: Exploitable Nexus of Geometry, Folding Mechanics and Stimuli-Responsive Physics. [PDF]

open access: yesAdv Sci (Weinh)
This article presents an insightful review on the exploitable nexus of geometry, folding mechanics and stimuli‐responsive physics for achieving active programmability in tubular origami metamaterials and metastructures, highlighting the broad‐spectrum potential in innovative applications across the length scales, along with critically analysing the ...
Sharma A, Naskar S, Mukhopadhyay T.
europepmc   +2 more sources

Hourglass Worm Gears Designed to Concentrate Surface Normals

open access: yesJSME international journal. Ser. C, Dynamics, control, robotics, design and manufacturing, 1994
To avoid the influence of small displacement of gear axes under load, the authors propose that all contact normals of a tooth surface should be at right angles to the direction of the small displacement induced at each contact point under load. On the basis of this state of surface normals, a few methods of tooth surface generation have been devised ...
Shigeyuki Shimachi   +3 more
openaire   +2 more sources

Meshing Theory Analysis of Parallel Inclined Double Roller Enveloping Hourglass Worm Drive

open access: yesJixie chuandong, 2021
Based on the modification of single roller enveloping hourglass worm drive, a new type of worm drive, parallel inclined double roller enveloping hourglass worm drive is proposed.
Honghui Liao   +3 more
doaj  

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