نتایج جستجو برای: die and mould machining
تعداد نتایج: 16922747 فیلتر نتایج به سال:
Economic globalization, together with heightened market competition and increasingly short product life cycles are motivating companies to use advanced manufacturing technologies. Use of high speed machining is increasingly widespread; however, as the technology is relatively new, it lacks a deep-rooted knowledge base which would facilitate implementation. One of the most frequent problems faci...
In this investigation a new model was developed to calculate gas pressure at the melt/foam interface (Gap) resulting from foam degradation during mould filling in the Lost Foam Casting (LFC) process. Different aspects of the process, such as foam degradation, gas elimination, transient mass, heat transfer, and permeability of the refractory coating were incorporated into this model. A Computati...
High speed milling (HSM) has great potential use in die/mold cutting, but traditional machining plans do exploit HSM capabilities effectively. An important consideration for in HSM is to limit cutting force variations, and one way to do so is to reduce Cutter-Workpiece engagement (CWE) variations. CWE is measured as the area of the tool instantaneously engaged with the part. Estimating CWE as a...
in dieser arbeit, die theoterische und praktische aspekte hat, wurde im praktischen teil funfder besten erzahlungen borcherts ausgewahlt, bearbeite und in form von frage und antwort, interpretiert und mit einigen hinweisungen zur behandlung dieser texte im unterrichrevollstandigt. der bearbeitung dieser texte wurde im theoretischen teil eine kurze erkeahrung und hinweisung auf die historisch - ...
in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...
The price of single point diamond tools with a sharp tip is very high due to complex machining process and highly expensive machining equipments. Yet, the performance is not quite satisfactory. In this paper, we have presented a very simple and cost effective machining process for the sharpening and polishing of diamond stylus using low energy reactive ion beam machining (RIBM). In our method, ...
Abstract In the present study, adjoint method is introduced to optimisation of corner cooling element in two baseline designs for a mould cavity, as examples Aluminium metal die-casting process. First, steady thermal model simulating process two-corner design scenario. This serves first iteration optimised using method. A dual-parameter objective function targets interfacial temperature standar...
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