齿轮锻件轴的重要作用 The important role of gear forging shaft
Gear shaft forgings Depending on the shape of the shaft, the shaft can be divided into crankshaft and straight shaft. According to the bearing of the shaft, can be divided into:
① shaft, work both bear bending moment and bear the torque, is the most common mechanical axis, such as various reducer shaft.
② mandrel, used to support the rotating parts only bear the bending moment without passing torque, some mandrel rotation, such as the railway vehicle shaft, etc., some mandrel does not rotate, such as support pulley shaft.
③ drive shaft, mainly used to transmit torque without bending moment, such as the crane moving mechanism of the long optical axis, the car's drive shaft.
In the design, the use of gear shaft is generally nothing less than the following:
1, gear shaft is generally pinion (teeth less gear)
2, the gear shaft is generally in the high-speed level (that is, low-torque level)
3, the gear shaft is rarely used as a variable speed slip gear, are generally fixed gears, one because at the high-speed level, the high speed is not suitable for slip speed.
4, the gear shaft is a shaft and gear synthesis of a whole, but in the design, or to try to shorten the length of the shaft, too long is not conducive to the hobbing machine processing, the second is too long support shaft shaft And increase the mechanical strength (such as rigidity, deflection, bending, etc.).
Reducer gear and gear shaft is an important transmission parts, work to bear the moment and torque, requiring better comprehensive mechanical properties, the teeth part of the greater bending stress, contact stress and friction, requiring a higher strength, Toughness and abrasion resistance. Gear and gear shaft material is generally 45 steel or low, medium alloy steel, with high strength and good plastic toughness. Therefore, the use of forging methods are generally used to achieve the process of forming these parts.