Page 122 - Turner 1st sem Practicals

Job sequence

TASK 1: Parallel turning

• Check the raw material size. • Face one side first and turn the outer diameter to
Ø45mm for the maximum possible length.
• Hold the job in a 4 jaw chuck and true it keeping about
50mm outside chuck. • Reverse and hold the job.
• Set the tool to the correct centre height. • Face the other end to a total length of 80mm.
• Select and set the correct spindle rpm. • Turn Ø45mm to remaining length.
• Remove the sharp edge.

TASK 2: Strap turning

• Hold the job in a 4 jaw chuck keeping about 45mm • Face the other end to maintain a 75mm total length.
outside and true it.
• Turn Ø42mm x 40mm length.
• Face one end.
• Remove the sharp corners.
• Turn Ø30mm x 35mm length.
• Reverse the job and reset it.

TASK 3: Grooving

• Set the u/c tool, radius tool, 'V' groove tool to the correct • Plunge the 'V' groove tool to form a 'V' groove 5mm width
centre height and hold it rigidly. at 6mm from the end face.
• form a square groove 2.5mm depth x 5mm width at • Remove the burrs.
30mm from the end face.
• Check the dimensions.
• Form a radius groove 2.5mm depth x 5mm width at
18mm from the end face.

TASK 4: Chamfering

• Set the chamfering tool correct centre height. • Chamfer the Ø30 step to 2 x 45°.
• Chamfer the Ø42 step to 3 x 45°. • Remove the job and check the dimensions.
• Reverse the job and reset it.

TASK 5: Parting

• Hold the job keeping Ø42 inside at 3 jaw chuck about • Select and set the correct spindle speed for parting
50mm outside and true the job. operation.
• Set the 3mm width parting tool correct centre height. • Part the job use plunge cut method at 45mm from the
end face.

Producltion & Manufacturing : Turner - Exercise 1.3.35 109