...Shu Wang; Xueqin Zheng; Cunfu Wang; Huageng Luo; Shikai Jing This paper presents formulations for hybrid casting and additive manufacturing (AM) in the density-based topology optimization. A location-based Heaviside function is introduced to represent the parting surface. The optimized part on two...

... of a workpiece in the form of a cast preform. For the calculations, it has been assumed that the billet material will be a Ø30 × 148 mm rod and a cast preform. Two variants of preforms have been modeled, from which products of the assumed geometry with different degree of strain are obtained. Calculations were...

..., reduces the roughness at the surface. The temperature on the tool face also plays a major role with respect to the size and stability of the BUE. The surface roughness of the austempered specimens was significantly better than those of as-cast specimens [( 12 )]. One of the other factors determining...

...Zhi Yang; Richard A. Wysk; Sanjay Joshi Visibility analysis is broadly used in milling and casting process planning and in coordinate measuring machine applications. However, standard visibility analysis (which involves determining visibility from a given viewpoint), cannot be applied directly...

... interlock between the rivet and work pieces. The current findings on the development of a method can be used to determine the preheat temperature for self-piercing riveting of magnesium castings. 23 06 2010 03 04 2011 09 06 2011 09 06 2011 automotive components casting...

... apparatus (SLA), selective layer sintering (SLS), fused deposition modeling (FDM), 3D print, etc., which are well suited for smaller parts that are rich in detail. Variable geometry molds (VGMs) offer a different approach to small production volume. A die or mold can change shape between the castings...

...Hai Su; Wenli Gao; Hui Zhang; Hongbo Liu; Jian Lu; Zheng Lu The flow behavior of the fluid has a significant effect on the particle distribution in the solid-liquid mixing vessel. The stir casting process is generally conducted in a closed crucible, in which the flow pattern is invisible. Therefore...

... discharge experiments are conducted using the machining parameters shown in Table 2 . 09 11 2009 08 03 2010 15 06 2010 28 04 2010 casting cracks electrical discharge machining finite element analysis melting microelectrical discharge machining multiple discharge...

...Ershun Pan; Liang Ye; Jianjun Shi; Tzyy-Shuh Chang This paper describes the development of an on-line quality inspection algorithm for detecting the surface defect (“bleeds”) generated in continuous casting processes. The challenges of bleed detection in visual images lie in the low signal-to-noise...

...Fernando Morales; José Talamantes-Silva; Salvador Valtierra; Alberto J. Pérez-Unzueta; Rafael Colás A series of experimental trials was carried out to study the metallic bond produced when hypereutectic aluminum liners are cast-in hypoeutectic aluminum engine-blocks. The samples were cast in a rig...

... Steel (Ispat Industries Ltd.) for twin-roll casting. This mathematical model can greatly shorten casting research on the use of EM fields for liquid metal containment and control. It can also optimize the existing casting processes and minimize expensive, time-consuming full-scale testing. The model...

...Tsuyoshi Takahashi, Senior Staff Engineer,; Yoshio Sugimura, Middle Grade Engineer,; Katsuhiko Sasaki, Associate Professor, Depending on casting methods, aluminum alloy cylinder heads differ greatly in quality and local strength as well as overall strength. Obviously, casting methods largely affect...

...J. Lo´pez, Associate Professor; F. Faura, Professor,; J. Herna´ndez, Professor; P. Go´mez, Assistant Professor, During the initial slow stage of the injection process in high-pressure die casting machines with horizontal cold chamber, a plunger pushes the molten metal which partially fills...

...M. T. Alonso Rasgado; K. Davey One of the failings of the pressure die casting process is that variable surface quality is a common result. This paper provides evidence that die vibration can be used to polish castings as they form during solidification. Evidence is obtained from experiments...

... for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING . Manuscript received Jan. 1998; revised Sept. 1999. Associate Technical Editor: S. G. Kapoor. 01 Jan 1998 01 Sept 1999 manufacturing processes machining casting machine tools Layered manufacturing (LM...

... in a non-destructive manner. The objective of the investigation presented was to establish an experimental correlation between rate of strain, or rate of loading, and the machinability of cast irons. Such an investigation would require the availability of a very large pool of machinability data, and high...

.... The models are tested by casting a small thin component using a die with conventional cooling channels and also using a novel die with irregular shaped cooling channels running on a hot chamber proprietary die casting machine. Simulation results are shown and experimental results using the hot chamber...

...S. Bounds; K. Davey; S. Hinduja The modeling of the pressure die casting process generally requires the specification of heat transfer coefficients at the surfaces of the die. The coefficients at the cavity-casting interface and at the cooling channel surfaces are of particular importance. In order...