Mesin Perkakas Bubut (Lathe/Turning)

Turning is the process of machining external (or internal) cylindrical and conical surfaces.  The process uses a machine tool called a lathe.

Turning Operations

Turning operations performed on a lathe include:

◦ Straight turning

◦ Taper turning

◦ End facing

◦ Facing

◦ Shoulder Facing

◦ Contour Turning

◦ Grooving

◦ Form turning

◦ Parting-off

◦ Threading: –Internal / External

◦ Knurling

◦ Drilling

◦ Reaming

◦ Milling-CNC turning centers

Process Calculations

Rpm calculation

◦ RPM

◦ Cutting Speed (CS)

Feed is typically a given distance per revolution.  This value is dependent on the operation, depth of cut, cutting speed,  tool material, surface finish, etc.  Units are in. per rev (in./rev)

Cutting Tools for Lathes

External

◦ Right hand turning

◦ Left hand turning

◦ Round nose turning

◦ Cut-off

◦ Left hand facing

◦ Broad nose finishing

◦ Right hand facing

◦ Threading

◦ Form

Internal

◦ Boring

◦ Threading

◦ Grooving

◦ Form

Workholding on a Lathe

Between centers

◦ Live-tailstock

◦ Dead-headstock

◦ Face plate

◦ Lathe dog

Chuck

◦ 3, 4 jaws

◦ Soft jaws

Collect system