نتایج جستجو برای: cutting position

تعداد نتایج: 278493  

Journal: :علوم کاربردی و محاسباتی در مکانیک 0
سعید امینی محمدجواد ناطق امیر عبداله

vibration cutting (vc), elliptical vibration cutting (evc) and ordinary cutting (oc) of in738 work-pieces have been experimentally investigated in the present research. the experiments were carried out by using single crystal diamond tool and ultra-precision cnc lathe. vibration frequency is 36.16khz and the amplitude is . the influence of various cutting parameters including cutting speed, fee...

Journal: :تحقیقات مهندسی کشاورزی 0
محمد جعفری مدرس مجتمع آموزش علمی کاربردی جهاد کشاورزی لرستان علی رجبی پور دانشیار دانشکده مهندسی و فناوری کشاورزی دانشگاه تهران حسین مبلی استاد دانشکده مهندسی و فناوری کشاورزی دانشگاه تهران

crops and agricultural products are subject to natural loading during growth. different mechanical forces are also exerted on them during harvest. one product, sugar cane, experiences large shear forces are during harvest. an examination of the crop properties and machine parameters of sugar cane are necessary to develop appropriate cutting tools and the optimization and design of harvesting ma...

Majid Karimian, Seyyed Ali Eftekhari, Seyyed Masoud Badakhshian

Since the cutting tools used in machining process of super alloys are subjected to high cutting forces, accordingly tools life is reduced, therefore improvement in alloys machining and reducing cutting forces to achieve longer tools life is an essential necessity. In this research, the effect of changes in feed rate on cutting forces in machining process of nickel based super alloys is investig...

Journal: :international journal of advanced design and manufacturing technology 0
sayed hadi nourian mehdi zohoor mostafa salehi

abstract: nowadays, the non-traditional processes such as “laser, edm and awj” used for cutting high thickness sheet metal. hardox is hard and tough steel alloy and it has many industrialize applications. one best process to cut the hardox is abrasive water jet (awj) cutting.  it can cuts complex shape with high quality and accurate tolerance.  awj cutting offers certain unique benefits such as...

ژورنال: طب کار 2013

Background: Sawing job is one of the occupations that have high work-related musculoskeletal disorders prevalence because of repetitive tasks. The current study aimed to determine work-related musculoskeletal disorders and risk factor of this disorder in YAZD city tailors. Methods: In a cross-sectional study, we take film from working process and worker’s postures, each task were assigned a po...

2017
A. Sreenivasa Rao K Venkata Rao

This paper presents the development of a cutting force model for end milling process under various cutting conditions and the tool wear is measured by Scanning Electron Microscope (SEM).This novel approach combines the concept of experimental design and finite element modeling of the cutting process which allows for a fairly accurate prediction of cutting forces with a significantly lower compu...

2015
Erel Segal-Halevi Avinatan Hassidim Yonatan Aumann

We consider the problem of fair division of a two dimensional heterogeneous good among several agents. Applications include division of land as well as ad space in print and electronic media. Classical cake cutting protocols either consider a one-dimensional resource, or allocate each agent several disconnected pieces. In practice, however, the two dimensional shape of the allotted piece is of ...

Journal: :The American Mathematical Monthly 1998
Jack M. Robertson William A. Webb

Based on the cutting force theory, the cutting stress in end milling operation was predicted satisfactorily through simulation of using finite element method. The mechanistic force models were introduced in high accuracy force predictions for most applications. The material properties in the simulations were defined based on the cutting force theory, as a function of strain and strain rate wher...

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