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Viswanath, B.
- Processing Techniques of Functionally Graded Composites-The Current Status
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Authors
Affiliations
1 Dept. of Mech. Engg., Karpagam College of Engg., Coimbatore, IN
1 Dept. of Mech. Engg., Karpagam College of Engg., Coimbatore, IN
Source
Manufacturing Technology Today, Vol 8, No 9 (2009), Pagination: 8-20Abstract
The advantage of composite materials is the high stiffness-to-weight and strength-to-weight ratios. The limitation of composite materials is debonding of the reinforcement from the matrix which occur under two conditions-a weak interface and mismatch of thermal and mechanical properties between the reinforcement and the matrix leading to a buildup of residual stresses. The problems have been overcome to some extent by improving the interface problems, using better reinforcements like particulates and whiskers and minimizing the residual stresses by suitably selecting the matrix and reinforcements. One answer to overcome the limitations is to use functionally graded materials (FGM's). This paper reviews the various processing techniques of FGM's and the current research work done.
- Current Challenges in High Speed Machining of Dies and Moulds the Cutting Edge Technology
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Various papers have been published in the area of HSM to cater to the demanding needs of manufacturers of dies and moulds. An attempt has been made to present yet another innovative paper on the current challenges and trends In HSM of dies and moulds for the benefit of toolmakers and engineers, academicians and the engineering community at large. This paper introduces HSM technique for the novice, highlights the need for HSM, the benefits of HSM and its limitations, the application areas, the production equipment, the spindle, the CMC controls, the drive system, the programming requirements, tool path generation, cutting tools, tool holders and tool holder systems, fixturing, cutting data requirements, chatter and shock control, out- of- cut time study, metal removal fluids, product requirements, die/mould manufacturing through HSM technique and safety aspects.
Authors
S. Ilangovan
1,
B. Viswanath
2
Affiliations
1 Mechanical Engineering, Amrita Institute of Technology and Science, Ettimadai, Coimbatore-641105, IN
2 Mechanical Engineering, Sri Krishna College of Engg. & Technology, Kuniamuthur, Coimbatore-641008, IN
1 Mechanical Engineering, Amrita Institute of Technology and Science, Ettimadai, Coimbatore-641105, IN
2 Mechanical Engineering, Sri Krishna College of Engg. & Technology, Kuniamuthur, Coimbatore-641008, IN
Source
Manufacturing Technology Today, Vol 2, No 5 (2003), Pagination: 3-10Abstract
With global competition picking up for supply of discrete products, shorter product life cycles, frequent design changes, quick delivery schedules, quality demands of customers and low costs. High Speed Machining (hereafter called HSM) plays a major role as one of the time compression techniques in manufacturing.Various papers have been published in the area of HSM to cater to the demanding needs of manufacturers of dies and moulds. An attempt has been made to present yet another innovative paper on the current challenges and trends In HSM of dies and moulds for the benefit of toolmakers and engineers, academicians and the engineering community at large. This paper introduces HSM technique for the novice, highlights the need for HSM, the benefits of HSM and its limitations, the application areas, the production equipment, the spindle, the CMC controls, the drive system, the programming requirements, tool path generation, cutting tools, tool holders and tool holder systems, fixturing, cutting data requirements, chatter and shock control, out- of- cut time study, metal removal fluids, product requirements, die/mould manufacturing through HSM technique and safety aspects.