Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Powiadomienia systemowe

Sesja wygasła!
Sesja wygasła!
Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: steel coil

Sortuj według:

Ogranicz wyniki do:

Soft-Sensing in Batch Annealing Based on Finite Differential Method and Support Vector Regression

Kačur Ján, Durdán Milan, Laciak Marek, Flegner Patrik

Advances in Science and Technology. Research Journal

2019

Vol. 13, no 4

70--86

The temperature of annealed steel coils is a determining variable of the future steel sheets quality. This variable also determines the energy consumption in operation. Unfortunately, the monitoring of coil inner temperature is problematic due to the furnace environment with high temperature, coil structure, and annealing principle. Currently, there are no measuring principles that can measure the temperature inside the heat-treated product in a non-destructive manner. In this paper, the soft sensing of inner temperature based on the theory of non-stationary heat conduction and approach based on Support Vector Regression (SVR) was presented. The results showed that a black-box approach based on the SVR could replace an analytic approach, though with lesser performance. Several annealing experiments were performed to create a training data set and model performance improvement in the estimation of inner coil temperatures. The proposed software based on non-stationary heat conduction can calculate the behavior of inner coil temperature from the measured boundary temperatures that are measured by thermocouples. The soft-sensing principles presented in this paper were verified under laboratory conditions and on the data obtained from a real annealing plant.

Spawanie orbitalne wężownic ze stali VM12-SHC

Gucwa M., Bęczkowski R., Stefański M.

Przegląd Spawalnictwa

2015

R. 87, nr 10

120--123

W pracy przedstawiono wybrane aspekty technologii wykonywania powierzchni grzewczych tj. wężownic przegrzewaczy pary z wykorzystaniem kompleksowego stanowiska do spawania metodą zmechanizowaną TIG. Próby spawania wykonano na rurach ze stali VM12-SHC o średnicy 44,5mm i grubości ścianki 7,1 mm. Przedstawiono wyniki badań niszczących oraz nieniszczących oraz wskazano na problemy jakie można spotkać w czasie spawania tego typu stali. Przeprowadzone próby spawania złącza doczołowego dowiodły, iż spawanie orbitalne metodą TIG jest procesem bardzo skutecznym pod względem powtarzalności oraz jakości wykonanych połączeń spawanych. Odpowiednio przygotowane oprogramowanie procesu spawania, czy też bieżąca kontrola stanu technicznego urządzenia, powodują iż wskaźnik wadliwość wykonywanych złącz wynosi poniżej 1%. Z tego względu metoda spawania orbitalnego TIG jest rekomendowana w przypadku, gdy spawane są elementy w gatunkach o utrudnionej spawalności tj. VM12-SHC.

The paper presents selected aspects of technology performance of the heating surfaces, ie. steam superheater coils using a comprehensive outcome for mechanized TIG welding. Welding was carried out on steel pipes VM12-SHC having a diameter of 44,5 mm and a wall thickness 7,1 mm. The results of destructive and non-destructive tests were presented and the problems that can be encounter during this type of welding steel were pointed out. The butt joint welding tests that were made have proved that orbital TIG welding is a process very effective in terms of reproducibility and the quality of the welded joints. Properly prepared welding process software or the current control of the technical condition of the appliance, cause that the impairment indicator of the performed connectors is less than 1%. Therefore, the orbital TIG welding method is recommended when the elements are welded in the species hindered weldability, ie. VM12-SHC.