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Spinning technology

There are two kinds of spinning forming: ordinary spinning and powerful spinning. The spinning that does not change the thickness of the blank but only changes the shape of the blank is called ordinary spinning forming; The spinning that changes the thickness and shape of the blank is called strong spinning forming. The spinning force required by the powerful spinning forming is large, and the structure of the spinning machine is generally complex. The powerful spinning forming can be divided into forward spinning and reverse spinning according to the direction of the roller movement and the direction of the metal flow. The rotation wheel moves in the same direction as the metal flow, which is called positive rotation; On the contrary, it is called counter rotation. For the same material, the spinning force required for reverse spinning is large. The spinning method to be used shall be determined according to the shape and process requirements of the parts.

Pay attention to the tension and wear of the engine pulley during routine inspection

Phenomenon: When the engine is running, there will be abnormal noise, such as rustling, squeaking, squeaking, etc. When the engine stops, you can move the pulley by hand to check whether there is sputum. If the gap is large, replace the belt. Middle wheel.

Study on Vibration of Eccentricity of Motor Rotor, Pulley, Gear and Impeller

The geometric centerline of the rotor shaft does not coincide with the center of the rotor. This causes the weight on one side of the rotation centerline to be greater than the weight on the other side, causing the shaft to oscillate in an irregular trajectory. This is an inherent instability problem, potential fault source or vibration source. Sometimes, although the effect of partial eccentricity can be "balanced" by dynamic balancing, there is still more oscillating motion. If the eccentricity of the rotor is large, it is even impossible to achieve good dynamic balance of the rotor. The increasing speed is now emphasized, so it is important to eliminate eccentricity.

Mist Removal Lecture Hall

Another year, in the fog season, the windshield "lost its temper". When winter comes, the car glass is particularly prone to fog, especially after parking overnight, the fog is more serious. Many car owners like to use a rag to solve the problem, but why don't we use some radical methods to prevent it? Now let's talk about some good ways to remove fog or prevent fog.

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