PLANER MACHINE

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• Q1: What is a planer Machine?
  Ans: A planer machine is a large machining tool used to produce flat, smooth, and accurate surfaces on heavy workpieces by moving the workpiece against a stationary cutting tool.
• Q2: State two uses of planer Machine.
  Ans: Uses of planer machine:

  • ➔ Machining large flat surfaces of machine parts
  • ➔ Cutting grooves, slots, and keyways on heavy jobs
• Q3: State any four advantages of planer Machines.
  Ans: Advantages of planer machine:

  • ➔ Can machine very large workpieces
  • ➔ High accuracy and good surface finish
  • ➔ Multiple tools can be used at once
  • ➔ Suitable for heavy-duty cutting
• Q4: State any two disadvantages of planer Machines.
  Ans: Disadvantages of planer machine:

  • ➔ Occupies large floor space
  • ➔ High initial cost and maintenance cost
• Q5: State the main parts of a planer Machine.
  Ans: Main parts of a planer machine:

  • ➔ Bed
  • ➔ Table
  • ➔ Saddle
  • ➔ Cross rail
  • ➔ Tool head
• Q6: What is a Saddle used for in a planer Machine?
  Ans: The saddle supports and allows movement of the cross rail or tool heads across the table for proper machining operation.
• Q7: What is a Cross Rail used for in a planer Machine?
  Ans: The cross rail is used to support tool heads and allows vertical adjustment for setting cutting depth.
• Q8: What is a Bed used for in a planer Machine?
  Ans: The bed is the rigid base of the planer machine on which the table moves and other components are mounted.
• Q9: What is a Tool Head used for in a planer Machine?
  Ans: The tool head holds the cutting tool and provides feed and cutting movement during machining operations.
• Q10: Briefly discuss the Adjustment of Forward/Backward Stroke for planer Machine.
  Ans: The forward and backward stroke adjustment controls the movement of the table.
  The cutting is done during the forward stroke, while the return stroke is idle.
  The stroke length is adjusted according to the size of the workpiece to ensure proper machining.
• Q11: Name the types of planer Machine.
  Ans: Types of planer machines:

  • ➔ Double housing planer
  • ➔ Open side planer
  • ➔ Pit type planer
  • ➔ Edge or plate planer
• Q12: Briefly discuss the Double Housing planer Machine.
  Ans: A double housing planer machine has two vertical columns (housings) on both sides of the table.
  Tool heads are mounted on both sides for simultaneous machining of workpieces.
• Q13: State the uses of the Double Housing planer Machine.
  Ans: Uses of double housing planer:

  • ➔ Machining large flat surfaces
  • ➔ Cutting heavy machine parts like bed plates
  • ➔ Used in heavy engineering industries
• Q14: State the advantages of the Double Housing planer Machine.
  Ans: Advantages of double housing planer:

  • ➔ High rigidity and stability
  • ➔ Both sides can be machined simultaneously
  • ➔ Suitable for heavy-duty work
• Q15: Briefly discuss the Open Side planer Machine.
  Ans: An open side planer has only one vertical column on one side of the table.
  It is used when workpieces are large but do not require support on both sides.
• Q16: State the uses of the Open Side planer Machine.
  Ans: Uses of open side planer:

  • ➔ Machining large plates and frames
  • ➔ Used where side access is required
• Q17: State the advantages of the Open Side planer Machine.
  Ans: Advantages of open side planer:

  • ➔ Easy loading and unloading of workpiece
  • ➔ Suitable for wide jobs
• Q18: What are Work Holding Devices? Name some.
  Ans: Work holding devices are tools used to securely hold the workpiece during machining operations.
  Examples include:

  • ➔ Vices
  • ➔ Clamps
  • ➔ Fixtures
  • ➔ Bolts and T-slots
• Q19: What is a Shaper Machine?
  Ans: A shaper machine is a machine tool used to produce flat surfaces by a single-point cutting tool that moves in a reciprocating motion over a stationary workpiece.
• Q20: What is the use of a Shaper Machine?
  Ans: A shaper machine is used for:

  • ➔ Machining flat surfaces
  • ➔ Cutting keyways and slots
  • ➔ Producing simple shapes on small jobs
• Q21: Compare Shaper Machine and planer Machine
  Ans: Shaper vs planer:

  • ➔ In shaper, tool moves; in planer, workpiece moves
  • ➔ Shaper is used for small jobs; planer for large jobs
  • ➔ Shaper is less expensive; planer is costly
  • ➔ Shaper has small cutting capacity; planer has heavy cutting capacity
• Q22: Name the Cutting Tools used on planer Machine.
  Ans: Cutting tools used in planer machine:

  • ➔ Single point cutting tool
  • ➔ Roughing tool
  • ➔ Finishing tool
• Q23: Name the lubricants used in a planer Machine.
  Ans: Lubricants used in planer machine:

  • ➔ Cutting oil
  • ➔ Mineral oil
  • ➔ Soluble oil
• Q24: Briefly explain the procedure of Planing a Flat Surface in a planer Machine.
  Ans: The workpiece is clamped on the table of the planer machine.
  The cutting tool is set at required depth.
  The table moves forward and backward, and cutting is done during forward stroke.
  Repeated strokes produce a flat and smooth surface.
• Q25: Briefly explain the procedure of Cutting Dovetail Slide on a planer Machine.
  Ans: The workpiece is fixed on the table.
  A dovetail cutting tool is set at the required angle.
  Multiple passes are made to gradually cut the dovetail shape with accuracy.
• Q26: Briefly explain the procedure of Cutting a Simple Slot in a planer Machine.
  Ans: The workpiece is clamped securely.
  A slotting tool is used and aligned properly.
  The tool removes material in successive strokes to form a straight slot.
• Q27: Briefly explain the procedure of Cutting T-slot in a planer Machine.
  Ans: First a straight slot is cut using a flat tool.
  Then a T-slot cutting tool is used to widen the bottom section.
  Final finishing is done to achieve accurate T-shape.
• Q28: State the precautionary measures while using a planer Machine.
  Ans: Precautions while using planer machine:

  • ➔ Properly clamp the workpiece
  • ➔ Ensure correct tool setting
  • ➔ Do not stand near moving table
  • ➔ Use proper lubrication
  • ➔ Avoid overloading the machine