Design and Development of Novel Lubricant Free Transmission System for Manual Bone Drilling Machine

2017 ◽  
Author(s):  
Mehdi Salehi ◽  
David Sternkopf ◽  
Ruediger Haas ◽  
Eric Schilling
Keyword(s):  
Design Process ◽  
Transmission System ◽  
Machining Parameters ◽  
Drilling Machine ◽  
Bone Drilling ◽  
Design And Development ◽  
Drilling Operation ◽  
Resistance Torque ◽  
Applied Forces ◽  
Torque Values

This paper describes design and development of novel lubricant free transmission system for manual bone drilling machine. In order to design the transmission system, applied forces and torques on the gears has to be achieved. In this regard, bone drilling forces and torques were detected, preforming experimental tests of the drilling operation by CNC milling machine. At this point, various drill diameters and machining parameters were considered. After achieving the bone drilling forces, they were utilized for gears design process. The design process including gear geometry, material and detailed design analysis were done according to German norm VDI 2736 - Part 3. In this context, the mating worm gears materials were selected out of stainless steel 316 and Polyether Ether Ketone (PEEK), which can reduce weight, noise, moment of inertia, and necessity of lubrication, etc. In order to evaluate the gears performance, numerically and experimentally were performed. The static stress and deflection of the PEEK gear tooth were investigated numerically by finite element analysis. According to the numerical results, each tooth force carrying capacity (until yield stress) were estimated until 302 N. Surface temperature and wear rate for two types of PEEK gears were examined, experimentally, while applying two resistance torque values, 0.75 and 0.5 Nm, to the manufactured transmission system. The selected torques were three and five times bigger than drilling torque values, enabling us to simulate the bone drilling operation considering unexpected loaded in the extreme case, misuse, emergence situation, and degradation. The maximum temperatures of the tooth contour of the transmission system raised to 127 °C. According to the results, the maximum achieved PEEK gear life was 200 minutes for the Natural PEEK polymer at the 0.5 Nm torque.

Measurement of roller chain wear lubricated with palm oil-based hexagonal boron nitride nanoparticles

2020 ◽  
Vol 72 (10) ◽  
pp. 1199-1204
Author(s):  
Hilmi Amiruddin ◽  
Mohd Fadzli Bin Abdollah ◽  
Muhamad Aliff Danial Mohamad Nizar
Keyword(s):  
Boron Nitride ◽  
Palm Oil ◽  
Wear Mechanism ◽  
Hexagonal Boron Nitride ◽  
Wear Performance ◽  
Content Type ◽  
Roller Chain ◽  
Resistance Torque ◽  
Torque Values ◽  
Lubrication Conditions

Purpose This study aims to introduce a novel technique which helped in quantifying the wear performance of a roller chain which was lubricated by using the palm oil-based hexagonal boron nitride (hBN) nanoparticles (nano-biolubricant). Design/methodology/approach The efficiency of the nano-biolubricant was evaluated by using a custom-made roller chain tribometer, at different resistance torque values at a constant speed and running time. Prior to the test, 2 different lubrication conditions were applied. The mass loss and elongation behaviour of a roller chain was selected as a degradation metric for monitoring the amount of the chain wear. The predominant wear mechanism of a roller chain was identified by surface morphological analysis. Findings Regardless of the lubrication conditions, the wear performance of the roller chain was significantly increased, at increasing resistance torque values. Higher wear was noted when the roller chain was lubricated using a nano-biolubricant, however, the wear curve showed a promising high chain life. The predominant wear mechanism involved is abrasive wear. Originality/value Although an increase in the elongation during running is based on the wear between the pins and roller, none of the earlier studies quantified the wear performance of a roller chain under differing lubrication conditions. Hence, for bridging the gap, this study described a new method for measuring the wear performance of the roller chain which was lubricated using the palm oil-based hBN nanoparticles or a nano-biolubricant. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-02-2020-0061/

Design and Development of Real-Time Video Transmission System Using Visual IoT Device

2018 ◽  
pp. 263-269
Author(s):  
Ken T. Murata ◽  
Takamichi Mizuhara ◽  
Praphan Pavarangkoon ◽  
Kazunori Yamamoto ◽  
Kazuya Muranaga ◽  
...  
Keyword(s):  
Real Time ◽  
Video Transmission ◽  
Transmission System ◽  
Design And Development

Design and Implementation of Point Symbol Database Based on ArcGIS Engine

2012 ◽  
Vol 263-266 ◽  
pp. 1853-1857
Author(s):  
Mao Lin Wang ◽  
Ai Jun Xu
Keyword(s):  
Design Process ◽  
Design Method ◽  
Word Type ◽  
Design Framework ◽  
Design And Development ◽  
Design And Implementation ◽  
Arcgis Engine ◽  
Point Symbol

In this article, geometric primitive approach is used to realize the design and development of point symbol database for mapping based on C# .NET and ArcGIS Engine. This paper presents the design framework and the design process of point symbol database, and studies design method and attribute management of point symbol, especially the design of point symbol attribute of word type of TrueType, which makes conveniently the point symbol for special map users needed.

Designing Game-Based Learning Activities in Virtual Worlds

2010 ◽  
pp. 270-280 ◽  
Author(s):  
Maria Toro-Troconis ◽  
Martyn R. Partridge
Keyword(s):  
Design Process ◽  
Virtual Worlds ◽  
Second Life ◽  
Imperial College ◽  
Learning Activities ◽  
Current Interest ◽  
Game Based Learning ◽  
Learning In Games ◽  
Design And Development

In view of the current interest taking place in the area of education and virtual worlds, such as Second Life®, many educationalists have began to explore the benefits of applying game-based learning in these environments. In this chapter, the authors attempt to explore the elements associated with game-based learning in virtual worlds, focusing on the design process and how effective game-based learning activities can be achieved following pedagogic frameworks. The authors view learning in games as a form of driving learners’ motivations and this is reflected in the design and development of the virtual respiratory ward at Imperial College virtual hospital explained in this chapter.

COMPLEXITY-BASED ANALYSIS OF THE INFLUENCE OF MACHINING PARAMETERS ON THE SURFACE FINISH OF DRILLED HOLES IN DRILLING OPERATION

Fractals ◽  
2019 ◽  
Vol 27 (06) ◽  
pp. 1950087 ◽  
Author(s):  
ASHFAQ AHAMED ◽  
ATHIF AHAMED ◽  
DILAN KATUWAWALA ◽  
TEOH TIONG EE ◽  
ZI HAN TAN ◽  
...  
Keyword(s):  
Surface Quality ◽  
Fractal Theory ◽  
Spindle Speed ◽  
Depth Of Cut ◽  
Machining Parameters ◽  
Dry Machining ◽  
Drilling Operation ◽  
Two Factors ◽  
Machining Operations

Drilling is a famous and widely used machining operation to make holes in the workpiece. The size and surface quality of drilled hole are two factors that should be considered mainly. In this research, we examine the effect of different machining parameters and conditions on the surface quality of generated hole in drilling operation. For this purpose, we employ fractal theory and investigate how the variations of depth of cut and spindle speed affect the complexity of surface texture of drilled holes in wet and dry machining conditions. Based on the obtained results, the increment of depth of cut and spindle speed in case of wet and dry machining causes lower complexity on the generated surface from drilling. In addition, the generated surface from dry machining is more complex than the generated surface from wet machining. The obtained method in this research can be applied to other machining operations in order to investigate the effect of machining parameters and conditions on the surface quality of machined workpiece.

Learn to Design by Mapping Information Among Several Methods

2012 ◽  
Author(s):  
Sergio Rizzuti
Keyword(s):  
Data Structure ◽  
Project Management ◽  
Product Design ◽  
Design Process ◽  
Design Activity ◽  
Design And Development ◽  
Matrix Formulation ◽  
Project Data ◽  
The University ◽  
Mapping Information

The paper is based on the experience matured in ten years of teaching “Product Design and Development” at the Faculty of Engineering of the University of Calabria (Italy). This paper is focused on the consideration that many of the methods employed during product design activity share a matrix formulation as a means of collecting and managing project data and that students must be familiarized with the use of this kind of data structure in a very different way from their previous experiences, because project management can be pursued by mapping information from one method to another. Students are in fact guided to organize data related to the design on which they are involved in order to guarantee that the information can be mapped from one formulation to another, meaning that they have the whole design process under control. Attention will be paid to the pedagogic aspects and problems associated with the way how information can be collected and ranked and how a decision can be made.

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