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Stainless Steel Crank Shaft
Material:Shaft
Iron material eccentric shaft
The eccentric shaft is a special shaft part. Its basic structure is still a shaft, but unlike an ordinary shaft, its axis does not coincide with the center of rotation, and there is a certain eccentricity. From the appearance point of view, the eccentric shaft is usually a cylindrical shaft. At a certain section or sections of the shaft, its center deviates from the center line of the entire shaft. For example, in some simple eccentric shaft designs, one end may be a normal cylindrical shaft segment used to install bearings and other components, while the center of the shaft segment at the other end deviates from the center position and is used to achieve specific motion functions.
Working principle
When the eccentric shaft rotates, due to the existence of eccentricity, the components connected to it will be driven to perform periodic reciprocating motion or non-uniform circular motion. For example, in the piston motion mechanism of an engine, the rotational motion of the eccentric shaft (crankshaft) is converted into the reciprocating linear motion of the piston through the connecting rod. Each time the eccentric shaft rotates, the piston will complete a cycle of up and down reciprocating motion. This is because during the rotation of the eccentric part of the eccentric shaft, its circular motion trajectory will cause the end point of the connecting rod connected to it to reciprocate, thereby driving the piston.
Manufacturing process
Forging process: For some eccentric shafts that bear larger loads, forging process is often used. Forging can refine the grains inside the material and improve the strength and toughness of the material. When forging an eccentric shaft, the appropriate blank must first be prepared according to the design requirements, and then forged by forging equipment (such as air hammer, friction press, etc.). During the forging process, parameters such as forging temperature and forging ratio must be strictly controlled to ensure the quality of the eccentric shaft. For example, in the forging process of automobile engine crankshafts, the forging ratio needs to be precisely controlled so that the strength of the crankshaft meets the design requirements and can withstand the huge torque when the engine is working.
Mechanical processing technology: After the eccentric shaft is forged or cast, it still needs a lot of mechanical processing. It mainly includes turning, milling, grinding and other processes. Turning is used to process the outer circle, steps and other parts of the shaft; milling can process features such as keyways; grinding is used to improve the surface accuracy and dimensional accuracy of the shaft. Due to the eccentricity of the eccentric shaft, special fixtures or processing methods need to be used to ensure the accuracy of the eccentric part during the machining process. For example, when turning the eccentric part of an eccentric shaft, an eccentric fixture needs to be used to fix the shaft on the lathe so that the tool can accurately machine the eccentric contour.
Engine field: As mentioned earlier, in the engine, the eccentric shaft (crankshaft) is a key component. It converts the reciprocating motion of the piston into rotational motion, thereby driving the vehicle forward or driving other equipment to operate. The quality and performance of the crankshaft directly affects the engine's power output, fuel economy and reliability. For example, in high-performance racing engines, the design and manufacturing accuracy of the crankshaft is extremely high to ensure that the engine can work stably at high speeds and loads.
Mechanical manufacturing field: In various mechanical devices, eccentric shafts are used to achieve different movement modes. For example, in vibrating machinery, the rotation of the eccentric shaft can generate vibration, which is used for screening and conveying materials. In stamping machinery, the eccentric shaft can drive the punch to reciprocate up and down to achieve stamping processing of plates.
Automation equipment field: In some feeding mechanisms or assembly mechanisms of automated production lines, eccentric shafts can be used to achieve intermittent motion or specific motion trajectories. For example, a robotic arm driven by an eccentric shaft can grab and place parts according to a set trajectory, improving production efficiency and assembly accuracy.
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Material: Iron
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Ningbo Yi Yi Precision Technology Co., Ltd.
Ningbo Yi Yi Precision Technology Co., Ltd. is leading China Iron material eccentric shaft suppliers and OEM/ODM Iron material eccentric shaft company, a combination of industry and trade enterprises, including Ningbo Xinhaocheng Precision Parts Co. With 1000 square meters of production plant and 30 employees. Its 2 companies focus on centering machine processing, production of precision non-standard parts, and has advanced imported equipment from Japan: STAR and Tsugami 5-9 axis centering machine, Citizen lathe, machining center and other equipment. The machine has the function of six-axis turning processing, which can complete drilling, turning, milling, tapping, boring, reaming, hobbing, shaping, etc. at one time, which can ensure the high precision, consistency and stable tolerance of shape of the parts. And according to the customer's needs, the power cutting tool function module with front and side milling function can be installed to complete the precision machining of complex shaft parts.
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