You must have heard of crankshafts. But do you really understand crankshafts? Do you know what a crankshaft is? Do you know how the crankshaft is forged? You may only know the approximate function of the crankshaft. Only by having an in-depth understanding of the crankshaft can we better grasp the purchase method and replacement method of the crankshaft.
Today, let LANDTOPMALL lead you to master the crankshaft. Check it out if you’re interested.
What is a Crankshaft
The crankshaft is the most important component in an engine. It bears the force from the connecting rod and converts it into torque, which is output through the crankshaft and drives other accessories on the engine to work.
The crankshaft is subjected to the combined action of the centrifugal force of the rotating mass, the periodically changing gas inertial force, and the reciprocating inertial force, so that the crankshaft is subjected to bending and torsional loads. Therefore, the crankshaft is required to have sufficient strength and rigidity, and the journal surface needs to be wear-resistant, work evenly, and have good balance.
Crankshaft Forging Technology
The automatic line with a hot die forging press and electro-hydraulic hammer as the main engine is the development direction of forged crankshaft production. These production lines will generally adopt advanced technologies such as precision cutting and blanking, roll forging (cross-wedge rolling) blanking, intermediate frequency induction heating, finishing hydraulic press precision pressing, etc. Auxiliary machines to form a flexible manufacturing system (FMS).
Through FMS, workpieces and molds can be automatically replaced and parameters can be adjusted automatically, and continuous measurement is performed during the work process. Display and record data such as forging thickness and maximum pressure and compare with the fixed value, select the best deformation to obtain 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 fiber property of the internal metal streamline, which can improve the fatigue strength by more than 20%.
Obtaining high temperature and low sulfur pure molten iron is the key to producing high-quality ductile iron. The main production equipment in China is a cupola furnace, and the molten iron is not pre-desulfurized; the second is the lack of high-purity pig iron and the poor quality of coke. The molten iron is melted in a cupola furnace, desulfurized outside the furnace, and then heated and adjusted in an induction furnace. The detection of molten iron components in China has generally been carried out by vacuum direct-reading spectrometers.
The airflow impact molding process is obviously superior to the clay sand molding process, and high-precision crankshaft castings can be obtained. The sand mold produced by this process has the characteristics of no rebound deformation, which is particularly important for multi-turn crankshafts. Some domestic crankshaft manufacturers have introduced airflow impact molding technology in Germany, Italy, Spain, and other countries, but only a few manufacturers have introduced the entire production line.
Crankshaft Electroslag Casting
Electroslag remelting technology is used in the production of crankshafts, making the performance of cast crankshafts comparable to forging performance. And it has the characteristics of fast research and development cycle, high metal utilization rate, simple equipment, and superior product performance.
Well, today LandHeroParts introduced the relevant knowledge about crankshafts, including what is the crankshaft, and crankshaft forging technology. I believe you must have a specific concept for the crankshaft. If you want to learn more about crankshafts, pay attention to LandHeroParts. If you want to buy a crankshaft, visit our store. I believe you will have unexpected surprises.
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