This document discusses various multi-point cutting and abrasive machining processes used at SNS College of Technology. It describes drilling operations like reaming, boring, and tapping. Reaming finishes holes with multi-edge tools for high precision. Boring increases hole size using a boring tool on a drilling machine. Tapping cuts internal threads. Milling operations like face milling and end milling are also outlined that use rotary cutters to remove material in various axes. Advantages of these processes include high speed, accuracy and productivity while disadvantages include high wear and chatter.

1. SNS COLLEGE OF TECHNOLOGY
An Autonomous Institution
Coimbatore - 35
PRESENTED BY
SUBASH P
713521ME062
MECHANICAL ENGINEERING
MANUFACTURING TECHNOLOGY-19MET202

2. MULTI POINT CUTTING AND ABRASIVE MACHINING PROCESSES
TYPES OF OPERATIONS
• Drilling operation
• Reaming
• Boring
• Tapping
• Milling operation

3. DRILLING OPERATION
• Drilling is a cutting process that involves the use of a drill bit to cut a circular-shape
hole in a workpiece. The drill bit used in drilling is a type of rotary cutting tool that,
like other rotary cutting tools, rotates while subsequently scraping material out of
the workpiece.
Types of drilling operations
• Reaming
• Boring
• Tapping

4. TYPES OF DRILLING OPERATIONS

5. REAMING
Reaming is a finishing operation of high-precision holes performed with a multi-edge
tool. High surface finish, superb hole quality and close dimensional tolerance are achieved
at high penetration rates and small depths of cut.
• Reaming process have a many cutting edges
• Tool cutting minimum size is 0.375
• Reaming cutting speed is less then drilling speed
• Only automatic feed

6. BORING OPERATION
• The boring operation is equivalent to turning, but is performed exclusively on internal
surfaces. It is used for roughing (sometimes referred to as 'hogging'), semi-finishing, or
finishing of castings or drilled holes.
• It is a process carried on drilling machine to increase the
size of drilled hole using the boring tool

7. TAPPING OPERATION
• Tapping is the process of cutting a thread inside a hole so that a cap screw or bolt can
be threaded into the hole. Also, it is used to make thread on nuts. Tapping can be done
on the lathe by power feed or by hand.

8. MILLING OPERATION
• Milling is the process of machining using rotary cutters to remove material by advancing a
cutter into a workpiece. This may be done by varying direction on one or several axes, cutter
head speed, and pressure.
• These machines can drill, bore, and cut an array of materials
•Plain or Slab Milling Operation
•UP and DOWN Milling Operation
•Face Milling Operation
•End Milling Operation
•Gang Milling Operation
•Straddle Milling Operation
•Groove Milling Operation
•Gear Milling Operation
•Side Milling Operation and
•T-Slot Milling Operation
TYPES OF MILLINGOPERATIONS

9. ADVANTAGES
• High speed
• Better surface finish
• Increased Productivity
• High Accuracy
• Huge Application
DISADVANTAGES
• High Flank wear
• Breaking of carbide
• High Chatter
• Chip clogging