There are many factors affecting the service life of large flanges. Due to the high viscosity of large flanges and poor chip breaking performance, it is easy to have chip scratching of workpiece threads or tap breakage in the process of tapping large flanges, which affects processing efficiency and thread quality. In order to extend the service life of the tap and improve the thread processing quality,
The obvious change in the thermo-mechanical history of large flanges over the entire length of the furnace coil mill, especially in the production of micro-large flanges, will strongly affect the degree of recrystallization, grain growth and precipitation generated on the finishing mill, and lead to drastic changes in the ultimate microstructure and function of the entire length of large flanges. The original geometric shape of the front guide part must be maintained when grinding, and it is best to use the tap shovel grinding machine for grinding. The best way to solve the problem of a long tap base is to customize a tap with a short base according to the specific requirements of the thread being machined.
The following says the selection of large flange tap, choose a better tap material. The wear resistance and toughness of the tap can be significantly improved by adding special alloying elements to ordinary high-speed tool steel. Reasonable selection of tool heat treatment methods to take into account the hardness and toughness of the tap. Appropriately increase the tap front Angle. However, it should be noted that if the front Angle of the tap is too large, it is easy to cause the tap to break the edge and tap out of the thread. The wear resistance, heat resistance and lubricity of the tap can be significantly improved by applying titanium nitride coating on the surface of the tap thread
