Wyniki wyszukiwania - BazTech

Ograniczanie wyników

3 Archives of Foundry Engineering

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: information technology to the foundry industry

Sortuj według:

Ogranicz wyniki do:

CastML - a language for description of casting products and processes

Stawowy A., Wrona R., Macioł A.

Archives of Foundry Engineering

2008

Vol. 8, iss. 4

205-208

This work presents CastML - an XML dialect for description of casting products and processes. CastML is extension of MatML which is an extensible markup language designed specifically for the exchange of materials information. The set of CastML tags allows to describe materials' information as well as technological processes, engineering drawings, products classifications and products manufacturers. CastML is simple, understandable and flexible language which makes it attractive for the specialist involved in any aspect of casting research, development, production, or design. The details on key elements of the proposed language are given. Practical application of CastML is illustrated on the example of an iron castings description.

Identification of boundary condition on the contact surface of continuous casting mould

Mochnacki B., Pawlak E.

Archives of Foundry Engineering

2007

Vol. 7, iss. 4

202-206

In the paper the methods of inverse problems solution are applied for the identification of substitute heat transfer coefficient in the primary cooling zone of continuous casting plant. The heat exchange between the cast strand and the continuous casting mould proceeds in the very complex conditions (air gap, layer of mould dressing, fouling etc.). For the needs of casting solidification modelling the real boundary condition on the contact surface should be simplified and one can introduce the mean boundary heat flux (the Neumann condition) or the substitute heat transfer coefficient (the Robin condition). These values can be found using the inverse approach. In order to solve the problem of identification, the gradient methods are here applied (the least square criterion with regularization parameter).The algorithm presented bases on the sensitivity analysis methods, in other words the values of temperature derivatives with respect to the unknown nodal heat transfer coefficients must be known. The basic and additional boundary problems connected with the sensitivity coefficients computations are solved using the generalized variant of finite differences method. In the final part of the paper the example of computations is shown.

Application of simplified model to sensitivity analysis of solidification process

Szopa R., Lara S.

Archives of Foundry Engineering

2007

Vol. 7, iss. 4

169-174

The sensitivity models of thermal processes proceeding in the system casting-mould-environment give the essential information concerning the influence of physical and technological parameters on a course of solidification. Knowledge of time-dependent sensitivity field is also very useful in a case of inverse problems numerical solution. The sensitivity models can be constructed using the direct approach, this means by differentiation of basic energy equations and boundary-initial conditions with respect to parameter considered. Unfortunately, the analytical form of equations and conditions obtained can be very complex both from the mathematical and numerical points of view. Then the other approach consisting in the application of differential quotient can be applied. In the paper the exact and approximate approaches to the modelling of sensitivity fields are discussed, the examples of computations are also shown.