As the most common tool in hole machining, drill bits are widely used in mechanical manufacturing, especially for the machining of parts and holes such as cooling devices, pipe plates of power generation equipment and steam generators. The application surface is particularly extensive and important. Today, the mechanical professor's WeChat platform found this collection of
How are drill bits made? What problems will be encountered in drill bit processing? About the drill bit material and its characteristics? What will you do after the drill bit fails?
As the most common tool in hole machining, drill bits are widely used in mechanical manufacturing, especially for the machining of parts and holes such as cooling devices, pipe plates of power generation equipment and steam generators. The application surface is particularly extensive and important. Today, the mechanical professor's WeChat platform found this collection of drill bits for you. Everything you need is here!
Characteristics of drilling
The drill bit usually has two main cutting edges. When machining, the drill bit is cut while rotating. The front angle of the bit is getting larger and larger from the central axis to the outer edge. The closer the outer part of the bit, the higher the cutting speed, the cutting speed to the center decreases, and the rotation center cutting speed of the bit is zero. The blade of the drill bit is located near the central axis of rotation. The auxiliary front angle of the blade is large, the chip-free space is free of debris, and the cutting speed is low, so it will produce greater axial resistance. If the cross-edge edge is grinded into Type A or Type C in DIN1414, and the cutting edge near the central axis is a forward angle, the cutting resistance can be reduced and the cutting performance can be significantly improved.
According to the shape, material, structure, function, etc. of the workpiece, drill bits can be divided into many types, such as high-speed steel drill bits (hemp drills, group drills, flat drills), integral cemented carbide bits, transferable shallow hole drills, deep-hole drills, sleeve drills and interchangeable bit bits, etc.
