Machining characteristics and cutting speed of spiral bevel gear

The spiral bevel gear transmission efficiency is high, the arc overlap coefficient is large, the umbrella tooth processing bearing capacity is high, the transmission is smooth and smooth, the operation is firm, the structure is compact, the energy saving material saving, the space saving, the wear resistance, the life is long, the noise is small. Gear processing of various mechanical transmission, spiral bevel gear transmission efficiency is relatively high, for all kinds of transmission especially high-power transmission has great economic benefits; Transmission of equal torque when the need for transmission parts transmission pair more space saving, smaller than the belt, chain drive space scale; Spiral bevel gear transmission ratio permanent stability, transmission ratio stability is often all kinds of mechanical equipment in the transmission of the basic requirements for transmission function; Screw bevel gear operation reliable, long life. The tooth shape of spiral bevel gear is an arc shape, and generally is a cone shape, like an umbrella, so the name of spiral bevel gear.

Spiral bevel gear is a kind of can according to the stable smooth transmission ratio, low noise transmission of transmission parts, spiral bevel gear different regions have different names, and because of the axis of the gear pair of spiral bevel gears intersection and make the winner, driven gear spiral Angle of flat, the axis offset of hypoid gear pair makes it automatic gear helix Angle is greater than the driven gear spiral Angle. Therefore, the normal modulus of hypoid bevel gear pair is equal, but the end modulus is unequal. The end modulus of automatic gear is greater than that of driven gear.) This makes the automatic gear driven by quasi-double-sided bevel gear has larger diameter and better strength and stiffness than the corresponding automatic gear driven by spiral bevel gear.

First of all, we have to consider is the spiral bevel gear turning and feed back after chosen, to ensure that under the condition of cutter durability, to choose the suitable cutting speed, the factors that affect the cutting speed are turning back, feeding, cutting area, cutting tool geometry and perspective, the cutter material, workpiece material, Planer power and fixture system rigidity and workpiece installation methods. The choice of cutting speed should consider the spiral bevel gear material, the harder the material, the greater the strength, in the process of planing, the cutting resistance is also large, and bring difficulties to the planing, so the workpiece hardness is high, the cutting speed should be smaller. When planing, the planer or light or heavy or slightly there is always some vibration, the higher the cutting speed, the greater the feed, the greater the vibration. When machining the spiral bevel gear with rough surface, the planer has little impact on the vibration of the planer. When planing the workpiece with high surface requirements, attention should be paid to prevent the formation of chip tumor in the process of planing, because the chip tumor generated on the tip of the tool will destroy the smooth surface of the workpiece. The method of preventing the chip tumor can be obtained by changing the cutting speed as described earlier.