Crankshaft is the most important component in an engine.It takes the force from the connecting rod, converts it into a torque and outputs it through the crankshaft and drives the other accessories on the engine.The crankshaft is subjected to the combined action of centrifugal force of rotating mass, periodic changing gas inertia force and reciprocating inertia force, which makes the crankshaft bear the action of bending torsion load.Therefore, the crankshaft is required to have sufficient strength and stiffness, and the surface of the journal should be wear-resistant, even-working and well-balanced.
Forging technology
In hot die forging press, the automatic line for host is active the development direction of forging crankshaft production, the production line will be widely used precision shearing blanking, forging (cross wedge rolling) blocking, medium frequency induction heating, finish hydraulic press and other advanced technology, and equipped with robots, conveyor belt, back mould device of the turntable in auxiliaries, such as formation of flexible manufacturing system (FMS).Through FMS, the workpiece and mold can be automatically replaced and the parameters can be automatically adjusted, and the measurement can be carried out continuously during the working process.Display and record the data of forging thickness and maximum pressure and compare with the fixed value, select the best deformation quantity to obtain the high quality products.The whole system is monitored by the central control room to realize unmanned operation.The crankshaft forged by this forging method has the full fibre nature of the inner metal flow and can increase the fatigue strength by more than 20%.
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