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Abstract

The present paper is concerned with the practical interconnection between virtual engineering tools and additive model manufacturing technologies and the subsequent production of a ceramic shell by rapid prototyping with the use of Cyclone technology to produce the aluminium casting prototype. Prototypes were developed as part of the student formula project, where several parts originally produced by machining were replaced by castings. The techniques of topological optimization and the combination with the tools of the numerical simulation were used to optimise the virtual prototype before a real production of the first prototype. 3D printing of wax pattern ensured direct and fast assembly of the cluster without any additional operations and troubles during dewaxing. The shell was manufactured in 6 hours thanks to a system of quick-drying of individual layers of ceramic shell. It has been verified that the right combination of individual virtual tools with the rapid prototyping can shorten the development time and delivery of the first prototypes from a few months to a few weeks.
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Bibliography

[1] Xiao, A., Bryden, K.M. (2004). Virtual engineering: A vision of the next-generation product realization using virtual reality technologies. Proceedings of the ASME 2004 Design Engineering Technical Conferences – DETC’04, 28 September – 2 October, pp 1-9.Salt Lake City, Utah, #57698.
[2] Pekkola, S. & Jäkälä, M. (2007) From technology engineering to social engineering: 15 years of research on virtual worlds. The DATA BASE for Advances in Information Systems. 38(4), 11-16.
[3] Bao, Jin, J.S., Gu, Y., Yan, M.Q. & Ma, J.Q. (2002). Immersive virtual product development. Journal of Materials Processing Technology. 129(1-3), 592-596. DOI: 10.1016/S0924-0136(02)00655-6.
[4] Van der Auweraer, H. (2010). Virtual engineering at work: The challenges for designing intelligent products. In: Proceedings of the TMCE 2010 Symposium, April 12-16, (pp. 3-18), Ancona, Italy.
[5] Stawowy, A., Wrona, R., Brzeziński, M. & Ziółkowski, E. (2013). Virtual factory as a method of foundry design and production management. Archives of Foundry Engineering. 13(1), 113-118. DOI: 10.2478/afe-2013-0022
[6] Dépincé, P., Chablat, D., Woelk, P.O. (2004) Virtual manufacturing: tools for improving design and production, Dans International Design Seminar - CIRP International Design Seminar, Egypt.
[7] Kumar, P., Ahuja, I.P.S. & Singh, R. (2013). Framework for developing a hybrid investment casting process. Asian Review of Mechanical Engineering, 2(2), 49-55.
[8] Kügelgen, M. (2008). From 7 days to 7 hours – Investment casting parts within the shortest time, 68th WFC - World Foundry Congress, 7th - 10th February, 2008, (pp. 147-151).

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Authors and Affiliations

V. Krutiš
1
ORCID: ORCID
P. Šprta
1
V. Kaňa
1
ORCID: ORCID
A. Zadera
1
J. Cileček
2

  1. Brno University of Technology, Czech Republic
  2. Alucast s.r.o., Czech Republic
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Abstract

This work deals with the problem of intermetallic phases in cast standard duplex steel ASTM A890 Gr 4A (generally known as 2205). The investigated steel was subjected to isothermal heat treatment in the range from 595 °C to 900 °C and in the duration from 15 minutes to 245 hours, and was also investigated in terms of anisothermal (natural) cooling after casting into the mould. The precipitation starts at grain boundaries with a consistent ferrite transformation. The work is focused on the precipitation of the sigma phase (σ) and the chi phase (χ). Examination of the microstructure was conducted using light and scanning electron microscopy. Their statistical analysis was carried out using the results of the investigations of precipitation processes in the microstructure, both within the grains and at the grain boundaries. To illustrate this impact, the surface area of precipitates was evaluated. The percentage of these intermetallic phases was calculated by measuring their area using a computer image analysis system. Based on their observations, a combined time-temperature transformation (TTT) diagram with continuous cooling transformation (CCT) curves was created.
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Authors and Affiliations

M. Myška
1
ORCID: ORCID
P. Bořil
1
ORCID: ORCID
V. Krutiš
1
ORCID: ORCID
V. Kaňa
1
ORCID: ORCID
A. Zádĕra
1
ORCID: ORCID

  1. Brno University of Technology, Czech Republic

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