Some Characteristics and Law of Button Bit Wear

An investigaton on in-situ indicated that the failures of button bits were obviously controlled by their weares. Based on above investigation, a few basic relations between the wear volumes of tungsten carbide bit buttons and move speeds, between bit lives and button weares, etc were obtained. The investigated results showed that weares of bit buttons affected not only bit lives but drilling efficiency, and the trimming for used bits increased not only bit lives but drilling velocity.