Machining Logs

Logs detailing machining experience

Name: John McKenna   
Job Title;-  Collar Additional Evidence
Workshop Set Up

  • Health and Safety signs before entering workshop were noted.
  • Appropriate PPE (Overalls, Boots, and Safety Glasses) was worn.
  • Checked product dimensions from engineering drawing.
  • Barrier cream was applied to protect skin from infection.
  • Proceeded with safety checks (emergency stop/ safety guard) on the machine.

Technical Procedure

Power Saw and Lathe:

  • Scribe used to mark BMS at 30 mm length
  • Ø 50mm BMS material was cut to 30mm long using power saw.
  • Workpiece was tightened and centred into lathe,
  • Lathe was set at 745rpm, CS45.
  • Workpiece was faced cleaned on 1 side.
  • Edge was chamfered 1x 45º
  • Overall length was reduced by placing the opposite end of the material into the soft jaws and facing it down 25 ± 0.25mm.
  • Digital Verniers used to check length before chamfer 1x 45º applied to this side.
  • Centre drill was set up in the tail stock to mark the centre of the material.
  • Ø 26mm drill was used with lathe speed set at 230rpm to drill through the workpiece.
  • Boring bar used to take 2x 1mm cuts off inside diameter.
  • Inside diameter of 28mm checked with verniers and ensured a tight fit to shaft.
  • Chamfered both sides of inside edge, 1 x 45º.

Milling Machine:

  • Material gripped in the diving head on the milling machine
  • Machine was then calibrated using the 6mm wobbler by touching onto the material and setting x –axis to “0” and then similarly zeroing the y –axis on the DRO digital read out.
  • DRO was used to find the centre point and set 6mm slot drill at 1500rpm.
  • 3 x 1mm cuts taken off the inside bore.

Finishing

  • Set workpiece in vice and filed slot square for key piece to fit.
  • Dimensions of collar were verified using digital verniers
  • Work area was cleaned.

Tools Used

  1. Rule
  2. R.H. Carbide
  3. 20mm Boring Bar
  4. Centre Drill
  5. 26mm Drill
  6. Digital verniers
  7. 6mm Slot Drill
  8. 6mm Wobler
  9. File
  10. Power Saw

Materials Used

1.       BMS bright mild steel

Safety Notes

1.       Safety Footwear

2.       Safety Glasses

3.       Overalls

4.       Barrier Cream

 

Name: John McKenna   
Job Title;- Key Additional Evidence
Workshop Set Up

  • Health and Safety signs before entering workshop were noted.
  • Appropriate PPE (Overalls, Boots, and Safety Glasses) was worn.
  • Checked product dimensions from engineering drawing.
  • Barrier cream was applied to protect skin from infection.
  • Proceeded with safety checks

Technical Procedure

  • Scribe was used to mark key steel at 30 mm.
  • 6mm square key steel was cut to 30mm long.
  • Workpiece was gripped in vice with soft jaws.
  • 2nd cut file was used to make one end square.
  • Smooth file was used to radius opposite end and reduce the total length down to 27mm.
  • All edges were de-burred
  • Workpiece was checked to fit into spindle and collar assembly

Tools Used

  1. 2nd Cut file
  2. Smooth File
  3. Rule
  4. Scribe
  5. Hacksaw
  6. Radius Gauge

Materials Used

6mm Key Steel

Safety Notes

1.       Safety Footwear
2.       Safety Glasses
3.       Overalls
4.       Barrier Cream

 

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