Podcast
Questions and Answers
What is the main function of the Electrical Mechanical Machine Shop (EMMS)?
What is the main function of the Electrical Mechanical Machine Shop (EMMS)?
Which type of tool consists of a single effective cutting edge?
Which type of tool consists of a single effective cutting edge?
What occurs during the chip removal process?
What occurs during the chip removal process?
Which chip type is characterized by having a built-up edge?
Which chip type is characterized by having a built-up edge?
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In the turning process, which is primarily generated on the work piece?
In the turning process, which is primarily generated on the work piece?
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What tool is specifically used in a turret lathe?
What tool is specifically used in a turret lathe?
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What is the main function of a milling cutter in the milling process?
What is the main function of a milling cutter in the milling process?
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Which type of cutting tool has more than one cutting edge?
Which type of cutting tool has more than one cutting edge?
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What is a characteristic of milling operations?
What is a characteristic of milling operations?
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Which tool is NOT considered a single point cutting tool?
Which tool is NOT considered a single point cutting tool?
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Study Notes
EMMS
- EMMS stands for Electrical Mechanical Machine Shop
- This shop prepares specimens for testing
- They create tools for machining
- They create cross-sections of wheels
- Operations include grinding, turning, milling, and finishing
TOOLS
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Single Point Cutting Tool: Simplest type with one cutting edge
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Removes excess material from the workpiece
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Examples include lathe tools (chamfering, parting, facing), shaper tools, planer tools, and boring tools
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Terminology:
- Side Rake Angle
- End Cutting Edge Angle
- Face
- End Cutting Edge
- Flank
- Axis
- Back Rake Angle
- Side Relief Angle
- Base
- Side Cutting Edge Angle
- End Relief Angle
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Terminology:
-
Multipoint Cutting Tool: Multiple cutting edges
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Examples include milling cutters, drill bits, reamers, broachers, and grinding wheels
Chip Removal Process
- Cutting tool moves against the workpiece
- Compressive force is exerted on the workpiece
- Material is stressed beyond its yield point
- Material deforms plastically and shears off
- Sheared portions flow as small chips along the cutting tool face
- Three types of chips:
- Continuous
- Continuous with built-up edge
- Discontinuous
TURNING (LATHE)
- Machining process for cylindrical and conical surfaces
- Rotating workpiece with a single point traversing cutting tool
- Usually performed on a lathe
- Single point cutting tool
TURRET LATHE
- Used for preparing cope and drag molds
MILLING
- Manufacturing process removing excess material from the workpiece
- Rotating multi-point cutting tool (milling cutter) is used
- Cutter is held in the machine spindle
- Workpiece is fed slowly against the rotating cutter
- Used for producing flat, angular, or curved surfaces
- Useful for cutting threads, gears, keyways, slots, and other operations
GRINDING
- Removes excess material with abrasive particles
- Abrasive particles are held together by an adhesive (grinding wheel)
- Grinding wheel is rotated at high speeds
- Contact with the workpiece removes material in the form of fine chips
- Depth of cut is achieved by downward movement of the grinding wheel
- Considered a finishing process (compared to turning, milling, or drilling)
- Produces high accuracy and surface finish
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Description
Test your knowledge on the operations and tools used in the Electrical Mechanical Machine Shop (EMMS). This quiz covers various cutting tools, including single and multipoint cutting tools, as well as the chip removal processes involved in machining. Brush up on your understanding of terminology and machining techniques!
