Control of Thermal Conditions on Grinding of Shafts by Disk Brushes

Abstract

The investigation has been made of the calculated values of contact temperature magnitudes, depth of thermal effect and the temperature conditions required for processing of shafts made of the 45, 12X18H10T and 40X13 constructional steels have been evaluated. It is established that the kinematic process parameters (cutting speed and frequency of a part rotation) and thermophysical characteristics of a part affect the value of a contact temperature in a processing zone as well as the nature of temperature of subsurface region. The increase in a cutting speed and decrease in frequency of a part rotation are shown to contribute to enhancing the power of a thermal source and values of a contact temperature. It is found that in order to ensure stable process of cutting and operating characteristics of a tool its cutting speed should not exceed 18 to 20 m/s when processing parts of a shaft type without cooling.

Keywords

• grinding
• contact temperature
• disk brush
• structural steel
• heat mode
• processing modes