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Prevention of Thermal Failures in Down-The- Hole Button Bit

Koteswararao.B, Ravi. D ,P. Satish

DTH is short for "down-the-hole". The down-the-hole drilling is used to produce large-diameter holes or bores in to the hard rock surfaces of earth crust. Generally the life of bit is 200 Metres because of insufficient of cooling or rough handling the life of button bit reduces. To avoid the cracks, wear and tear on the button bit there is a necessity to change material and design. The bottom surface of the button bit subjected to high thermal stress. Due to high temperature and impact force there is a chance of deflection of the head. In my paper we are going to design a new model to improve the heat transfer rate as well as high strength material. The results taken based on ANSYS software .Because while manual testing in the lab we got 98% nearer values to software value.