An Experimental Comparison on Dimensional Accuracy of Wax Patterns of Gas Turbine Blades Produced by Rapid Tooling

Zamani, Jamal; Hemati, Mohammadreza; Morsaluie, R.

doi:10.1007/s13369-014-1272-7

Cited by 11 publications

(4 citation statements)

References 6 publications

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“…In addition, low pressure with higher temperature is desirable to produce accurate patterns with PU mould, whereas for the silicone mould, only the injection temperature has an effect on the dimensions of the wax patterns. Zamani et al [17] compared the dimensional accuracy of wax pattern of gas turbine blade produced by epoxy moulds and silicone rubber moulds and concluded that epoxy mould can produce more accurate models than the silicone rubber mould. Thian et al [18] employed vacuum casting method to produce micromoulds and microgears using silicone rubber mould and investigated that the deviation between the master pattern and its ten specimens was very small and the proposed method is highly capable of consistently producing micro parts that are dimensionally accurate with respect to the master pattern.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations for dimensional accuracy and surface finish of polyurethane prototypes fabricated by indirect rapid tooling: a case study

Singh

Singh²,

Singh³

2017

Prog Addit Manuf

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In this research work, an effort has been made to study the influence of selected input parameters on the dimensional accuracy (linear as well as radial) and surface finish of polyurethane prototypes fabricated by vacuum casting (VC) process as a case study. The master pattern required for making a silicone mould has been fabricated by fused deposition modelling and its surface finish has been enhanced by chemical vapour smoothing process. Maximum shrinkage of 2.29 and 4.77% has been observed in the selected linear and radial dimension, respectively, after the VC process. Optimal parameter settings that were different for both the dimensions as well as surface finish have been obtained using Taguchi's L18 orthogonal array. Finally, parameter setting that simultaneously minimizes the dimensional deviation and surface roughness has been found out using response optimization module of Minitab 17 software and the results obtained have been verified by performing the confirmation experiments. The tolerance grades for the selected dimension of the prototypes were found to be acceptable as per the ISO standard UNI EN 20286-I (1995) and DIN16901 for plastic materials. In addition, the C pk value greater than 1.3 indicated that the proposed process is highly capable. The surface finish and dimensional accuracy of prototypes are at par with the traditional moulding patterns, and hence, they can be used as end-products or plastic-based master patterns for investment casting applications.

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Section: Introductionmentioning

confidence: 99%

Experimental investigations for dimensional accuracy and surface finish of polyurethane prototypes fabricated by indirect rapid tooling: a case study

Singh

Singh²,

Singh³

2017

Prog Addit Manuf

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“…The maximum deviation value on Dimensions A and B were 0.106mm and 0.246mm, respectively. The results showed inconsistent values of dimensional deviation on the two sections, supporting the possibility that this may be due to the direction of filling in the silicone mold [11]. In addition, for surface roughness, the Ra values for all samples were within the range of 21.445 μm to 22.025μm, while the measured surface roughness of the FDM pattern was 22.075μm.…”

Section: Resultsmentioning

confidence: 88%

“…On the other hand, application of SLA patterns has been widely adopted in the investment casting process. SLA patterns were used to replicate a series of sacrificial patterns for the investment casting process, such as turbine blades [11,12] and turbine impellers [13]. A Selective Laser Sintering (SLS) pattern was used to facilitate the casting process of complex geometry (bores, horizontal, vertical and inclined surfaces) [14].…”

Section: Introductionmentioning

confidence: 99%

Comparison of different additive manufacturing patterns on the performance of rapid vacuum casting for mating parts via the Taguchi method

Mustafa¹,

Kadir²,

Ngadiman³

et al. 2020

JMES

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Rapid vacuum casting has been proven to be a successful method in producing high-quality parts in small series. However, a challenge lies in the selection of proper Additive Manufacturing (AM) technologies for the development of a master pattern for the vacuum casting process. Each AM technologies differ from one another in terms of dimensional accuracy, surface finish, cost and lead times. The aim of this study is to investigate the performance of casting mating parts based on different additive manufacturing patterns for small batch. Three types of AM-based patterns: Fused Deposition Modeling (FDM), Stereolithography (SLA) and Multi-Jet Fusion (MJF) were compared. The Taguchi method, Signal to Noise ratio (S/N), Analysis of Variance (ANOVA) and T-test were conducted in determining the optimized parameters. From the findings, curing time is shown to be a significant parameter for dimensional accuracy and surface finish. Dimensional deviation varies in different directions of parts. For surface finish, there was only a slight change from the master pattern whereas the surface roughness of casting parts decreased within the range 0.23% to 2.85%. Tolerance grades for the selected dimensions of the parts were in the permissible range, based on ISO286-1:2010. When using distinct kinds of AM patterns to create replacement components, design tolerance is needed. It was suggested to select AM technology similar to that had been used for the original components. Battery cover was selected as a case study to represent the mating application parts.

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“…A few examinations have been accounted for as a indirect methodology for delivering wax designs through silicon elastic molding from AM based master sample to diminish the expenses related with single-part or little amount creation amid the IC procedure [5]. Further, numerous analysts have effectively manufactured sacrificial wax designs for IC process by room temperature vulcanized form process [32][33][34][35][36][37], however until now, exceptionally less work has been accounted for to create polypropylene (PP) copies that can be used as plastic based examples in customary IC process so as to enhance the dimensional precision for mind boggling and multifaceted shapes. Garg et al [37] examined the impact on the hardness of inserts manufactured as half breed IC and reasoned that form thickness and volume to surface zone proportion of the casting assumes a critical job in choosing the microstructure and hardness of the casting.…”

Section: Introductionmentioning

confidence: 99%

CAD-CAM Assisted Design and Preparation of Biocompatible Sensors and Transducers with Variable Microstructure

Singh

Dureja

et al. 2019

KEM

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This paper highlights the detailed procedure for preparation of biocompatible sensors and transducers by CAD-CAM assisted investment casting (IC). Along with the properties such as biocompatibility and bioactivity, the presented materials possess good surface finish (required for aesthetic sense), acceptable dimensional accuracy (required for assembly purposes) and good surface hardness (required while chewing). In this paper efforts were made for improving surface hardness, finish, and dimensional accuracy of biocompatible materials by controlling composition/proportion of Ni and Cr in IC process. In this case study stir casting (SC) assisted Ni and Cr based metal matrix composites (MMC) has been prepared and composite prepared were poured in the investment mould. The result of study reveals that different material composition influenced the microstructure and the hardness of the MMC prepared. Further with change in weight percentage of Ni and Cr, different microstructures with particle clustering was observed. The employment of nickel and chromium composites for the fabrication of novel sensors and transducers is discussed.

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An Experimental Comparison on Dimensional Accuracy of Wax Patterns of Gas Turbine Blades Produced by Rapid Tooling

Cited by 11 publications

References 6 publications

Experimental investigations for dimensional accuracy and surface finish of polyurethane prototypes fabricated by indirect rapid tooling: a case study

Experimental investigations for dimensional accuracy and surface finish of polyurethane prototypes fabricated by indirect rapid tooling: a case study

Comparison of different additive manufacturing patterns on the performance of rapid vacuum casting for mating parts via the Taguchi method

CAD-CAM Assisted Design and Preparation of Biocompatible Sensors and Transducers with Variable Microstructure

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