QE 107 WORKSHOP TECHNOLOGY

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QE 107 WORKSHOP TECHNOLOGY

• Teachers
• Professor S.D. Pathirana
• Dr. M. Nanayakkara

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Course Schedule

• Lectures - 12 hours
• Tutorials - 03 hours
• Laboratory work - 48 hours (24 eq. hours)
• Project - 12 hours (06 eq. hours)
• Total - 45 hours ( 3 credits)
• Evaluation scheme
• Mid 20, End 50, Project 30

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What do we learn in this course?

• Techniques or methods
• - to manufacture/assemble products for us
  to use in our day-to-day life.

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Modern Manufacturing Processes
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Power driven machines, Moving parts
Mechanisms

• are the possible sources of accidents in
  factories
• SAFETY is extremely important

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Safety measures

• How to stop the machine instantly.
• Clamp the tool/work properly.
• Do not touch or handle waste metal.
• Loose hair, loose clothing (shirts, blouses,
  saris), neck-ties are not permitted. Loose hair
  comb well knot firmly.
• Take extreme care in the use of hand tools.
• Wear shoes.
• Wear protective spectacles (will be provided)

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Machining
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Cutting Tools

• There are basically two types of cutting tools
• Single point (e.g. turning tools).
• Multiple point (e.g. milling tools).

turning tools
drilling tools
milling tools
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Cutting Mechanism

• During machining, the material is removed in the
  form of chips, which are generated by shear
  deformation along a plane called the shear plane.

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Chip Types

• Continuous chips
• Ductile material
• Ex Mild steel, Al
• High speed
• Low feed
• Small depth of cut

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Tool Geometry

• The shape and orientation of the cutting tool
  greatly affects the chip formation mechanics

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Rake Angle

• Of particular importance is the rake angle that
  the tool makes with the workpiece normal
• Effects on the chip formation

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End