Endmilling

Endmilling is a machining process used to create flat, curved, or contoured surfaces on a workpiece. It involves the use of a multi-tooth cutting tool, known as an endmill, which rotates at high speeds to remove material from the workpiece. The endmill is held in a spindle and guided along the desired path by a computer numerical control (CNC) machine or manually by a machinist.

The process begins with the selection of an appropriate endmill based on the material, desired surface finish, and the specific geometry of the workpiece. The endmill is then positioned at the starting point of the cut, and the CNC machine or machinist guides it along the programmed path. As the endmill rotates, its teeth engage with the workpiece, removing material in a series of small, incremental cuts.

Endmilling can be performed using various types of endmills, including flat endmills, ball endmills, and corner radius endmills, each suited for different applications. The process can be used to create a wide range of features, such as pockets, slots, and contours, and is commonly employed in industries such as aerospace, automotive, and manufacturing.

The surface finish and dimensional accuracy of the endmilled part are influenced by several factors, including the feed rate, spindle speed, depth of cut, and the type of endmill used. Proper selection and use of these parameters are crucial for achieving the desired results. Additionally, endmilling can be performed on a variety of materials, including metals, plastics, and composites, making it a versatile machining process.