A Novel Approach for the CAM-Follower Mechanism of High Frequency Cutting File Machine

2013 ◽  
Vol 333-335 ◽  
pp. 2085-2088
Author(s):  
Eurico Seabra ◽  
Hélder Puga ◽  
Luis Ferreira Da Silva
Keyword(s):  
External Force ◽  
High Frequency ◽  
Classical Mechanic ◽  
Virtual Model ◽  
Cam Mechanism ◽  
Novel Approach ◽  
Commercial Package ◽  
Cam Follower ◽  
Motion Characteristics ◽  
Positive Return

In this work, the re-design of the camfollower mechanism of an industrial cutting file machine is presented. The actual mechanical system includes a forceclosure cam mechanism, which requires an external force to keep the contact between the cam and the follower provided by a spring. This system is substituted by a new cam mechanism of the type of formclosure, which does not require external force. The formclosure camfollower mechanism, also called positive-return cam mechanism, guarantees that the cam surface is always in contact with the follower surface, and is characterized by having constantbreadth. Classical Mechanic Theory performs the study of the kinematic and dynamic characteristics of the cam mechanism analyzed throughout this work. Furthermore, a commercial package software was used to create a virtual model and analyze the motion characteristics of the new cam mechanism.

scholarly journals Novel approach to modeling high-frequency activity data to assess therapeutic effects of analgesics in chronic pain conditions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zekun Xu ◽  
Eric Laber ◽  
Ana-Maria Staicu ◽  
B. Duncan X. Lascelles
Keyword(s):  
High Frequency ◽  
Activity Patterns ◽  
Treatment Strategies ◽  
Therapeutic Effects ◽  
Activity Levels ◽  
Activity Data ◽  
Novel Approach ◽  
High Frequency Activity ◽  
Using Data ◽  
Chronic Pain Conditions

AbstractOsteoarthritis (OA) is a chronic condition often associated with pain, affecting approximately fourteen percent of the population, and increasing in prevalence. A globally aging population have made treating OA-associated pain as well as maintaining mobility and activity a public health priority. OA affects all mammals, and the use of spontaneous animal models is one promising approach for improving translational pain research and the development of effective treatment strategies. Accelerometers are a common tool for collecting high-frequency activity data on animals to study the effects of treatment on pain related activity patterns. There has recently been increasing interest in their use to understand treatment effects in human pain conditions. However, activity patterns vary widely across subjects; furthermore, the effects of treatment may manifest in higher or lower activity counts or in subtler ways like changes in the frequency of certain types of activities. We use a zero inflated Poisson hidden semi-Markov model to characterize activity patterns and subsequently derive estimators of the treatment effect in terms of changes in activity levels or frequency of activity type. We demonstrate the application of our model, and its advance over traditional analysis methods, using data from a naturally occurring feline OA-associated pain model.

An Optimality Criterion for the Structural Optimization of Machine Elements

2005 ◽  
Vol 127 (3) ◽  
pp. 415-423 ◽  
Author(s):  
C.-P. Teng ◽  
J. Angeles
Keyword(s):  
Structural Optimization ◽  
Optimality Criterion ◽  
Mass Reduction ◽  
Speed Reduction ◽  
Optimum Dimension ◽  
Novel Approach ◽  
Cam Follower ◽  
Machine Elements ◽  
A Current

Methods of structural optimization have been studied and developed over the last three decades. An important aspect of structural optimization pertains to the condition under which the loads are applied. Most machine structures in operation are subject to loads varying as functions of time. In this paper, a novel approach is proposed to cope with loads whose magnitudes vary within given bounds and with variable directions. The underlying ideas are applied to the structural optimization of the roller-carrying disk of a novel class of cam-follower speed reduction devices termed Speed-o-Cam (SoC). Results obtained in this paper are compared with a current prototype and with an intermediate design in which the dimensions of the roller pins are optimized. Combined with the optimum dimension of the roller pins, our structural-optimization results lead to an improvement of almost twice the stiffness with a mass reduction of 40% of the original prototype.

Based on the Pro/E Straight Moving Disc Cam Modeling and Motion Simulation

2012 ◽  
Vol 452-453 ◽  
pp. 142-146
Author(s):  
Ying Xing Xie
Keyword(s):  
Motion Equation ◽  
Motion Simulation ◽  
Cam Mechanism ◽  
Profile Equation ◽  
Cam Follower

Through the Pro/E software, build straight moving disc cam follower motion equation of the curve, establish the cam modeling, and assemble to make the cam work simulation, revise cam outside contour profile equation, so as to improve the design of cam mechanism.

Web Based Virtual Design of Dynamics of Roller Gear Cam System

2004 ◽  
Vol 471-472 ◽  
pp. 677-681
Author(s):  
Yi Qi Zhou ◽  
Wei Xiao Tang ◽  
H. Zhang ◽  
B.C. Shi
Keyword(s):  
Control System ◽  
Dynamics Simulation ◽  
Design System ◽  
Prototype System ◽  
Virtual Model ◽  
Virtual Design ◽  
Web Based ◽  
Cam Mechanism ◽  
Interactive Dynamics ◽  
Network Platform

The remote virtual design system based on B/S framework is investigated in the paper. On reviewing the current virtual design system situation, the control system dynamics simulation is integrated into the virtual design system of roller gear cam mechanism. Simulink and Matlabserver are employed to realize the dynamics simulation for the system, and COM and VRML technologies are used to browse the virtual model on the network platform. The prototype system indicates that the system can serve as an effective tool for designing roller gear cam mechanism with the better properties of interactive dynamics performance design and expansion usage.

A Hydraulic Rotary Switched-Inertance Servo-Transformer

1988 ◽  
Vol 110 (2) ◽  
pp. 144-150 ◽  
Author(s):  
F. T. Brown ◽  
S. C. Tentarelli ◽  
S. Ramachandran
Keyword(s):  
Steady State ◽  
High Frequency ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Complete Solution ◽  
Partial Solution ◽  
State Theory ◽  
Novel Approach ◽  
Flow Through ◽  
Theory And Experiments

Switched-reactance hydraulics represents a radically novel approach to the control of fluid power, since the proportional metering of flow through adjustable orifices is eliminated, and the inertive properties of the fluid substituted. Potential advantages in bandwidth, linearity, and efficiency have been indicated. This paper presents the first steady-state theory and experiments with a rotary fluid switch, which accomplishes the needed pulse-width modulation at a desirably high frequency. Cavitation problems are observed, means of their partial solution are implemented, and means of a more complete solution are indicated.

Sign in / Sign up

Export Citation Format

Share Document