This paper presents a computational approach for optimal robust design and tolerancing of turbomachinery compressor blades that are subject to geometric variability. This approach simultaneously determines the optimal blade geometry and manufacturing tolerances to minimize the overall cost of producing and operating the resulting compressor blades. A pathwise sensitivity method is used to compu...

Modern diesel fuel injection system (common rail and pump-nozzle-units) requires the reference of crank angles, engine speed and load to estimate the two parameters: crank angle at the start of fuel injection and amount of fuel to inject for a diesel engine. Measurement of engine speed of a combustion engine is carried out by sensor wheels mounted on the crankshaft. Crank angles can be estimate...

In this work we address the problem of tolerance representation and analysis across the domains of industrial inspection using sensed data, CAD design, and manufacturing. Instead of using geometric primitives in CAD models to define and represent tolerances, we propose the use of stronger methods that are completely based on the manufacturing knowledge for the objects to be inspected. We guide ...

Tolerancing has great impact on the cost and quality of a product. Dimensional and geometric tolerancing are designed to ensure that products meet both designed functionality and minimum cost. The task of dimensioning and tolerancing in process planning stage is to determine the working dimensions and tolerances of the machined parts by given blueprint (B/P) specifications. A lot of research wo...

Realistic modeling of cost of manufacturing is essential both for estimating cost of a product and for optimizing alternate manufacturing strategies. Although there are many factors that affect cost of manufacturing, the single most important parameter for estimating the cost of manufacturing is tolerance (deviation from the nominal size). Since tolerance affects the manufacturing cost directly...

İmalat sanayinde büyük öneme sahip olan talaşlı imalat prosesinde istenilen, hassas tolerans aralığında ve düşük yüzey pürüzlülük değerlerinde parça imal edebilmek en önemli amaç olarak görülmektedir. Yüzey kalitesi ölçü tamlığı, temas etkileşim halinde çalışan makine parçalarının dayanımını performansını derecede etkilemektedir. Bu çalışmalar esnasında CNC tornalama işlemi ile üretilen özellik...

Purpose: Purpose of this paper is the definition of a framework to describe the Technological Product Specifications (TPS) and the information associated with the geometric dimensioning and tolerancing to integrate the design concepts into a commercial inspection system. Design/methodology/approach: A functional tolerance model provides a complete framework to define the geometric dimensioning ...

We present an efficient algorithm for worst-case and statistical kinematic tolerance analysis of mechanisms with parametric part tolerances. The algorithm derives the kinematic variation directly from the part geometry, the part degrees of freedom, and the allowable parameter variations. It first derives a geometric representation of the kinematic variation as parametric surfaces in the mechani...