USING MILLING TECHNIQUES Flashcards

1
Q

Engineering info on a drawing (5)

A
  • Dimensions
  • Scale
  • Tolerance
  • Material
  • Designers name
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2
Q

Factors effecting speeds & feeds when milling (4)

A
  • cutting fluid
  • material
  • Required surface finish
  • Machine power
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3
Q

Types of work holding equipment (4)

A
  • Vice
  • Direct clamp
  • Rotary table
  • Fixture
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4
Q

Requirement for leaving milling machine (3)

A
  • Remove work from holding device
  • Remove swarf and clean down machine
  • Return surplus material to store
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5
Q

DTI plunger type gauge (2)

A
  • Plunger range is 0-12 mm

* 1mm = 1 rev on dial

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6
Q

Properties of high speed steel (3)

A
  • Wear resistance
  • hardness retention - even at red heat
  • Toughness
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7
Q

Applications for HSS (2)

A
  • Drills, taps, saw blades

* Wood-turning

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8
Q

Procedure for selecting a cutter (2)

A
  • Select tool with correct diameter

* Check teeth are not damaged

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9
Q

Checks when assembling a tool for milling a pocket (3)

A
  • Choose a slot drill
  • Check cutter and collet is in good condition
  • The shank of the cutter and collet match
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10
Q

Calculations for cutter RPM (1)

A

•N = 1000* V/ π*D

  • V = surface speed (m/min)
  • D = diameter (mm)
  • N = speed in rpm
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11
Q

Classes of fit (2)

A
  • Clearance fit - the shaft is always smaller than the hole it needs to go into
  • interference fit - the shaft is always bigger than the hole it needs to go into
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12
Q

Types of milling cutter (2)

A
  • Face mill - for creating a large flat area with a good surface finish
  • End mill - for milling the end of a block, outsife profile, or cutting a thin slot or internal pocket
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13
Q

Dividing head (1)

A

•W = R*H/D

  • R = ratio
  • H = number of holes
  • D = number of divisions required
  • W = whole number
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