The surface geometric characteristics of the workpiece in the high-speed machining center include surface roughness, surface waviness, and surface processing texture. Surface roughness of workpieces is the basic unit that constitutes the geometric characteristics of the machined surface.
When metal cutting is used to process the surface of a workpiece, the surface roughness is mainly affected by geometric factors, physical factors and cnc machining service china process factors.
1. Geometric factors: The shape and geometric angle considered from a geometric point of view, especially the tool tip arc radius, main declination angle, secondary declination angle and feed amount in cutting amount, have a great influence on the surface roughness.
2. Process factors: From the perspective of technology, consider its impact on the surface roughness of hardware parts, mainly including factors related to cutting tools, factors related to workpiece material, and factors related to CNC processing conditions.
3. Physical factors: Considering the physical nature of the cutting process, the edge fillet and subsequent extrusion and friction cause plastic deformation of the metal material, seriously worsening the surface roughness. When a CNC lathe processes plastic materials to form strip-shaped chips, it is easy to form high-hardness accumulated chips on the rake face. It can replace the rake face and cutting edge for cutting, changing the geometric angle and back cutting amount. The contour of the built-up edge is very irregular, so the surface of the workpiece shows knife marks that are constantly changing in depth and width. Some built-up edges are embedded in the surface of the workpiece, which increases the surface roughness. The vibration during cutting increases the surface roughness parameter value of the workpiece.