Detailed Description: Why Separate Rough and Finish Machining in Automated Parts Processing?
Rough machining and finish machining of mechanical parts must be processed separately in automated production to guarantee the dimensional accuracy and stability of precision parts.
During rough machining, large cutting volumes generate high cutting force, clamping force and cutting heat, resulting in obvious work hardening and serious internal stress in the workpiece. If finish machining is performed immediately, the part accuracy will be quickly lost due to stress redistribution.
For high-precision parts and hardware prototypes, stress relief aging treatment or low-temperature annealing must be arranged between roughing and finishing to eliminate residual internal stress.
Heat Treatment Process Arrangement in Automated Machining
Heat treatment to improve machinability (annealing, normalizing, tempering) → arranged before machining
Stress relief treatment (aging, conditioning) → arranged after rough machining and before finish machining
Heat treatment to enhance mechanical properties (carburizing, quenching) → arranged after part forming
Additional machining is required if heat treatment causes large deformation
Common CNC Tools for Automated Parts Processing
Tungsten steel coated milling cutters: For steel and cast iron, excellent heat resistance and wear resistance
Standard twist drills: For general hole drilling on conventional materials
Core drills: Ideal for special workpiece machining
Spot drills & center drills: Used for center positioning and hole guiding
Chamfering cutters: For part chamfering (can be replaced by spot drills)
CNC ball-end milling cutters: For curved surface machining and special processing
CNC boring cutters: For precision adjustable hole boring (high precision, no reaming function)
Reamers: For precision hole reaming and hole perpendicularity correction
Face milling cutters (flying cutters): For large plane milling
Corner radius cutters: For roughing and face milling with wide applications
Thread milling cutters: For thread milling via programming
Taps: For internal threading (cutting, spiral, extrusion types)
Dovetail cutters: For dovetail groove machining
Engraving cutters: For product surface engraving
Hobbing cutters: For hole machining with mirror surface finish
