Electrical Mechanical Machine Shop Quiz

EMMS (Electrical Mechanical Machine Shop)

• EMMS is an abbreviation for Electrical Mechanical Machine Shop
• This shop prepares specimens for testing
• Machining tools and cross-sections of wheels are created here
• Operations performed include grinding, turning, milling, and finishing

Tools

• Single Point Cutting Tool: A simple tool with a single cutting edge to remove excess material from a workpiece
  • Examples include lathe tools (chamfering, parting, facing), shaper tools, planer tools, and boring tools
• Terminology of Single Point Cutting Tool: Includes terms like side rake angle, end cutting edge angle, face, end flank, axis, back rake angle, side relief angle, base, side cutting edge angle, and end relief angle. (Refer to diagram for visual representation)
• Multipoint Cutting Tool: A tool with more than one cutting edge
  • Examples include milling cutters, drill bits, reamers, broachers, and grinding wheels

Chip Removal Process

• When a cutting tool interacts with a workpiece, a compressive force is exerted
• This force stresses the workpiece beyond its yield point, causing plastic deformation and shearing
• Sheared material flows along the cutting tool face in the form of small chips
• There are three types of chips
  • Continuous chips
  • Continuous chips with built-up edge
  • Discontinuous chips

Turning (Lathe)

• Turning is a machining process to create external cylindrical and conical surfaces on a rotating workpiece
• A single-point cutting tool traverses the workpiece on a lathe
• Turret lathes are for preparing cope and drag molds

Milling

• Milling is a manufacturing process using a rotating multi-point cutting tool (milling cutter) to remove excess material
• The cutter rotates, and the workpiece is fed against it
• Milling machines are useful for small-to-medium jobs, creating flat, angular, or curved surfaces, threads, gears, keyways, slots, and more

Grinding

• Grinding removes excess workpiece material using abrasive particles bonded to a rotating wheel (grinding wheel)
• The wheel rotates at high speed, and contact with the workpiece creates fine chips
• The process is downward, creating a finishing process.
• Grinding yields high accuracy and surface finish compared to other processes like turning and milling.

Test your knowledge on the operations and tools used in the Electrical Mechanical Machine Shop. This quiz covers various machining processes, single and multipoint cutting tools, and chip removal methods relevant to the field. Perfect for students and professionals looking to refresh their skills!