The tungsten alloy crankshaft, commonly called crank, is the part of an engine which has the function of translating reciprocating linear piston motion into rotation with the component of "crank throws" or "crankpins", It typically connects to a flywheel to reduce the pulsation characteristic of the four-stroke cycle, and sometimes there is a torsional or vibrational damper at the opposite end for the purpose of reducing the torsion vibrations caused along the length of the crankshaft by the cylinders farthest from the output end acting on the torsional elasticity of the metal. The tungsten alloy crankshaft is grinded to increase the mixture flow and has a special shape to reduce turbulences inside the crankcase. The tungsten alloy crankshaft is placed on the balancer and spun to determine the points where metal needs to be added or removed. The balancer indexes of the crank show the exact position and weight to be added or subtracted. The electronic brain inside the balancer head does the calculations and displays the results. The tungsten alloy crankshaft counterweight is done by two inserts which are made of tungsten alloy, to improve acceleration. Common method is adding light elements such as silicon to reduce the weight of the crankshaft.
Why Adopting Tungsten alloy as crankshaft Counterweight materials?
As it is known to all, steel and lead also can be used as crankshaft counterweight, the followings will introduce the reasons why we choose tungsten alloy as crankshaft counterweight.
Firstly, tungsten alloy have very high melting point and density which are twice than steel and more than 50% heavier than lead, which is important in the case of needing high weights while low volume. What's more, tungsten alloy has high density and high tensile strength, separately ranging from16.5 to18.75 g/ cm and 700 to 1000Mpa. In addition, tungsten alloy has good corrosion resistance, weld ability, machinability and low thermal expansion. Besides, it is wearable, resulting in prolong the life of the tungsten alloy crankshaft which is so important to companies for saving of regular cost. Finally but not the lastly, tungsten alloy's harmless to health and environment-friendly which is important in this decades also leading people to adopting tungsten alloy materials for their crankshaft counterweight. The above advantages have made tungsten alloy ideal materials for crankshaft.
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