Temat: flanging - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Application of the design of experiments and statistical hypothesis to reduce defects in the flange of the steel plate process
Autorzy:: Sadłowska, Hanna
Wójcik, Piotr
Tematy:: laser cutting
flanging
fracture
statistical hypotheses; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:: https://bibliotekanauki.pl/articles/29520066.pdf Link otwiera się w nowym oknie
Opis:: The paper presents a discussion on the occurrence of defects in the circumferential flange of steel plate. The numerous flange face defects have been analysed. The types of defects have been selected and categorized using an experimental planning procedure involving 600 samples for 24 different process variants, considering variables such as material, hole diameter, tool size and tool position. The analysis of experimental results enabled to determine of the optimal values of process parameters to minimize the occurrence of defects. Furthermore, the influence of individual parameters on the quality of the flange surface has been carried out to obtain the process parameters’ impact using statistical hypotheses. As a result, it was possible to develop rules which will be helpful in the design process, especially important when changing the material to be processed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Computer-aided analysis of a new process for flanging hollow parts
Autorzy:: Winiarski, G.
Tematy:: flanging
hollow parts
Al-Mg-Si alloy
FEM; Pokaż więcej
Wydawca:: Polskie Towarzystwo Promocji Wiedzy
Powiązania:: https://bibliotekanauki.pl/articles/118231.pdf Link otwiera się w nowym oknie
Opis:: The paper presents a new process for flanging hollow parts. This process is performed using a specially designed set of tools with movable sleeves. The principle of operation of the tool set is described and examples of the numerical analysis results are given. The FEM simulation was performed on the assumption that the hot-formed hollow workpiece (tube) is made of AlMgSi aluminum alloy. The obtained FEM results show changes in the workpiece shape during flanging, variations in the forming force and the damage function distribution computed according to the C-L failure criterion. The theoretical results of the new flanging method provided basis for experimental tests.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 3.

Tytuł:: Numerical analysis of three-stage the forming process hollow forgings with an outer flange
Autorzy:: Wójcik, Łukasz
Bulzak, Tomasz
Winiarski, Grzegorz
Szala, Mirosław
Tematy:: forging
extrusion
radial forging
hollow part
stepped shaft
flanging; Pokaż więcej
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Powiązania:: https://bibliotekanauki.pl/articles/135267.pdf Link otwiera się w nowym oknie
Opis:: This article presents the results of computer simulations used to investigate the forming of a hollow coldworked forging with an outer flange. Numerical simulations were performed in Deform 2D/3D using a calculation module for axial-symmetric cases. A ϕ57×12.5 mm tube-shaped billet from 42CrMo4 grade steel was used. The forming process involved two and three stages, consisting of extrusion the shaft portion and forging the flange. The objective of this research was to determine the accuracy of the forming process used to produce the hollow part. This technology was analyzed using the effective strain distributions, the Cockcroft-Latham fracture criterion values, and the forming force progression. The results showed that it was possible to use this three-stage process to forge elements from a tube-shaped billet.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Urządzenie do obcinania dennic
Flanging machine for dished ends
Autorzy:: Sawicki, Tadeusz
Tematy:: dennice
silosy
urządzenia do obcinania
obcinanie
bottoms
silos
flanging machine
trimming; Pokaż więcej
Wydawca:: Wydawnictwo Druk-Art
Powiązania:: https://bibliotekanauki.pl/articles/304152.pdf Link otwiera się w nowym oknie
Opis:: Zdecydowana większość wykonywanych dennic, służących do produkcji zbiorników i cystern, wytwarzana jest metodą tłoczenia na gorąco. Dennica wytłoczona na gorąco nie jest idealnie okrągła i zawsze posiada naddatek na obcięcie. Średnicę dennicy po tłoczeniu wyznacza się z obwodu, tj. mierząc obwód i dzieląc przez liczbę π, otrzymujemy wymagany wymiar. Wysokość dennic jest ściśle regulowana normami i przepisami i uzyskuje się ją po obcięciu.
A considerable number of dished ends of cylindrical tanks, silos and pressure vessels is produced by hot forming. The surplus material obtained in this process needs to be trimmed off for the dished ends to meet the design requirements and conform to the design standards. This is usually achieved by using specialised flanging machines. The two main functional components of these machines are the cutting torch and the carriage platform. The cutting torch must have provisions for being precisely positioned against the flange. The carriage platform must enable smooth movement of the dished ends at a range of angular speeds, thus facilitating accurate operation of the cutting torch. Apart from ensuring dimensional specifications are met, flanging machines often enable a chamfer to be applied to the edge of the flange.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 5.

Tytuł:: Paddle shape optimization for hole-flanging by paddle forming through the use of a predefined strain path in finite element analysis
Autorzy:: Besong, Lemopi Isidore
Buhl, Johannes
Bambach, Markus
Tematy:: paddle forming
paddle shape optimization
incremental hole-flanging
strain path mapping; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/99811.pdf Link otwiera się w nowym oknie
Opis:: This research investigates a novel hole-flanging process by paddle forming through the use of finite element (FE) simulations. Paddles of different shapes rotating at high speeds were used to deform clamped sheets with predrilled holes at their centers. The results of the simulations show that the paddle shape determines the geometry and principal strains of the formed flanges. A convex-shaped paddle forms flanges with predominant strains in the left quadrant of the forming limit diagram (FLD). However, the convex paddle promotes unwanted bulge formation at the clamped end of the flange. A concave paddle forms flanges with no bulge but the principal strains of elements in the middle section of the flange are in the right quadrant of the FLD which indicates an increased probability for crack occurrence. An optimization of the paddle shape was conducted to prevent bulging at the clamped end while avoiding crack occurrence. The paddle shape was optimized by mapping the deformation of some elements along the flange length to a pre-defined strain path on the FLD while maintaining the bulge height within the desired geometric tolerance. The radii and lengths of the paddle edge were varied to obtain an optimum paddle shape.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Numerical Analysis of a Six Stage Forging Process for Producing Hollow Flanged Parts from Tubular Blanks
Autorzy:: Winiarski, Grzegorz
Bulzak, Tomasz Adam
Wójcik, Łukasz
Szala, Mirosław
Tematy:: flanging
extrusion
hollow parts
stepped shaft
kołnierzowanie
wytłaczanie
części drążone
wał stopniowany; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/101985.pdf Link otwiera się w nowym oknie
Opis:: This paper presents the results of a numerical analysis of a cold forging process for a hollow flanged part. The analysis was performed using Deform 2D/3D. 42CrMo4 steel tubes were used as the billet material, and their material model in the annealed state was described by a constitutive equation. The forming process was performed in six stages with the use of methods such as extrusion with a movable sleeve, open-die extrusion, and upsetting. The objective of the study was to determine whether the proposed forging technique could be used to produce hollow parts with flanges. The determination was made based on the analysis of product geometry quality and process parameters, including the Cockcroft-Latham ductile fracture criterion and forming forces.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 7.

Tytuł:: A New Method of Flanges Extrusion in Hollow Products – Analysis of the Limiting Phenomena
Autorzy:: Winiarski, Grzegorz
Bulzak, Tomasz Adam
Wójcik, Łukasz
Szala, Mirosław
Tematy:: extrusion
flanging
hollow parts
cold metal forming
odrzucenie
kołnierz
puste części
formowanie metali na zimno; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/103394.pdf Link otwiera się w nowym oknie
Opis:: The paper presents an innovative method of metal forming of hollow flanged elements. In this process, flanges are formed using a movable sleeve, which moves in the opposite direction to the punch. The movement of the sleeve causes a closed impression to open, due to which the flange is also formed in a semi-free impression. The tube billets were made of the 42CrMo4 grade steel deformed under the cold metal forming conditions. The calculations were conducted using the finite elements method in Deform-2D/3D. Various technological parameters of the process were analysed, among others the diameter of the flange and the initial height of the impression of the movable sleeve. On the basis of the obtained results, the limiting phenomena of the process were determined and the influence of the analysed technological parameters on these phenomena were presented.
Dostawca treści:: Biblioteka Nauki

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