The theoretical comparison of the bonding strength of involute cylindrical gears The tooth surface temperature is an important parameter to evaluate the anti-bonding property of gears, which is generally obtained by the superposition of the body temperature and the instantaneous flash temperature of involute cylindrical gears. GB/Z6413. 1 is based on flash temperature method to evaluate gear bonding strength, GB/Z6413 2 and HB/Z 84 4. It is based on integral temperature method to evaluate the bonding strength of involute cylindrical gears. Blok H has developed a general solution to the gluing problem. The contact temperature is divided into two components, namely, the body temperature and the flash temperature, which is the result of mutual heat transfer between the two contact tooth profiles. The flash temperature method is based on the Blok flash temperature theory, calculates the instantaneous maximum flash temperature of the tooth surface on the meshing line and directly adds it to the body temperature to obtain the tooth surface temperature, compares the tooth surface temperature and the allowable value of the bonding temperature, and determines the risk of the bonding failure of the involute cylindrical gear.
| Standard No | Computing method | Scope of application |
| GB/Z 6413. 1-2003 | Flash temperature method | It is suitable for the working conditions with banded or approximately banded Hertz contact area and sufficient high P é clet number; |
| GB/Z 6413. 2-2003 | Integral temperature method | It is not sensitive to the local temperature peak, so it is not suitable for the situation where there is a local temperature peak; |
| HB/Z 84. 4-1984 | Integral temperature method | Suitable for straight teeth, helical teeth and herringbone teeth with hard tooth surface involute internal and external meshing of aviation steel; |
Winter H introduced the concept of average temperature of tooth surface in 1975, and believed that the average flash temperature was the reason for the gluing of tooth surface. The higher the average flash temperature of the whole meshing tooth surface, the easier the gluing occurred, thus forming another judgment method for the gluing failure of involute cylindrical gears – the integral temperature method. The integral temperature method is to obtain the tooth surface temperature by averaging the flash temperature of each meshing point along the direction of the meshing line, adding the body temperature after weighting the average value, and then determine the gluing failure of the involute cylindrical gear. As shown in the table, the similarities and differences of the three standards are listed in terms of standard number, calculation method and application scope. The three standards are only applicable to the evaluation of the thermal bonding of involute cylindrical gears, HB/Z 84 4 and GB/Z 6413 2 It is not applicable to the evaluation of local temperature peaks.