1,721,431 research outputs found
Analisi di alcune classi di errori nella determinazione sperimentale di stati di sollecitazione mediante rosette estensimetriche
No full textMachining Economics and Tool Life Variation. Part 2: Application to Models for Machining Processes
No full textA simple machining operation is modeled according to some management choices by stochastic simulation, taking into account two main tool failure mechanisms. Under the assumption that premature tool failures account for either work interruption or production of defective pieces, the effects of tool change schedule, production block size and sudden failure on production rate and cost are assessed. Some minimum regions are found for expected values of dependent variables, which have no counterpart for upper bound value
Machining Economics and Tool Life Variation. Part 1: Basic Considerations and Their Practical Implications
No full textThe joint distributions of economic parameters corresponding to ″optimum″ conditions (minimum cost, and maximum production rate), as affected by a single tool wear mechanism, are analyzed and the information process is examined using a Bayesian approach. Results obtained for an example show that even scanty experimental evidence may be profitably exploite
Adenosine antagonizes the histamine-induced stimulation of human atrial myocardium: protection by H1-receptor blockade.
No full textSome Considerations on Tool Life Scatter and Its Implications
No full textThe effect of tool-life scatter on the uncertainty of parameters of a typical tool-life model is analyzed using the joint confidence region approach. Some apparent contradictions concerning tool-life test data are explained in terms of their information content in the light of personal probability concepts.</jats:p
Fracture and Wear as Factors Affecting Stochastic Tool-life Models and Machining Economics
No full textUnder production conditions cutting tools often fail under several failure modes, the occurrence of a single one only for a given operation being rather exceptional. In light of this observation a stochastic model is developed, considering as causes of tool failure both wear and fracture processes. Machining economics are then analyzed with a probabilistic approach, deriving distribution functions of profit rate.</jats:p
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