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CHAPTER 1
INTRODUCTION
1.1 Background
One of the work holding devices that is used to securely hold the position and prevent movement of the part against the locator throughout the machining cycle is a clamp.
The term clamp is used when the tool is temporary use for positioning and holding components during working process. Some clamp is used for temporary, as in
positioning component while others are intended to be permanent. The clamp must not damage or deform the part and must be strong enough to hold the part and to resist
movement. The material used to produce the clamp must be from the high toughness and high hardness to prevent clamping force damaging or bending to part and some
kind of recycle material can be used.
Figure 1.1: Example of Clamping on the Machine Working Table; 1 clamping in the machine vice; 2 clamping directly onto the machine table.
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For this project, Tin Sn was use as the main materials because the material is cheaper than other material and can recycled. Tin Sn have low hardness, low
melting point, low toughness of material properties and high ductility of material; and because of that, involving the reinforced material Rice Husk Fibres is important to
increase the hardness and strength. Natural fibre is a type of renewable sources and a new generation of reinforcements and supplements for polymer based materials Mei-
po Ho et. al., 2012. Natural fibres can be divided based on their origin, derivations of plant, animal and
mineral types which are detailed shown in Figure 1.2
Figure 1.2: The classification of different natural fibres Mei-po Ho et. al., 2012
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Natural fibre is one of the excellent reinforced materials that are tough and hard and have found to be a potential reinforcement. The different natural fibres sisal and rice
husk fibres seem to be promising materials because of the high tensile strength of sisal fibre and the toughness of rice husk fibre Jacob et. al., 2004.
1.2 Problem Statement
Kategori