Knowledge

Commonly used tool materials and cutting data Figure 2-6-17 shows the material classification of cutting tools commonly used today. Among them, there are five main tool materials,

Coated tools Surface coating is applied to the tool (blade) substrate with good toughness, and a thin layer of materials with high hardness, high wear resistance, and high temperat

Cutting heat and cutting temperature When cutting metal, the work done due to chip shear deformation and the work done by the friction of the rake and flank faces of the tool are c

Cutting force (1) Total cutting force Total cutting force refers to the force generated in the cutting process that acts on the workpiece and the tool in equal magnitude and in opp

Work hardening (1) Causes of work hardening Different degrees of plastic deformation will occur in the machined surface layer during cutting Severe deformation will change the proc

Built-up edge and spurs (1) When the built-up edge cuts the plastic metal material, because the workpiece material is squeezed, the chip generates a lot of pressure on the rake fac

Chip types and control 1. The type of chip Due to the different materials of the workpiece and the different cutting conditions, the chip shapes generated during the cutting proces

The surface of the workpiece During machining, three constantly changing surfaces are formed on the workpiece. Surface to be machined: The surface on the workpiece to be cut. Machi

In this chapter, we will select the corresponding machining tools for each machining element of a typical part in Figure 7-1. The workpiece is made of 45 steel quenched and tempere

Cutting movements (1) Main motion The main motion is the main motion provided by the machine or manpower, which makes the relative motion between the tool and the workpiece, so tha

Trochoidal milling Trochoidal milling is a processing method that deals with some abrupt changes in the local large margin of the three-dimensional surface. Figure 6-31 is a schema

Contour milling and rock climbing milling Figure 6-26a is a simple schematic of solid surface milling. Surfaces are not too complex, but they can be selected from a variety of path