Page 57 - Turner 1st sem Practicals

Job sequence

TASK 1 :

• Check the material size as per drawing.
• Remove the burrs if any
• Hold the job in the vice in such a way that the channel
section does not get distorted.
• File the edges S square with the sides S and S . (Fig1)
4 1 3
Mark 90mm length keeping S as the base and punch
4
the marked line.
• File the excess length by a rough file or a bastard file
and finish it to the size (90mm given in the drawing).
• File the surface S square with the surface S and finish
2
1
it to the given size. (90 x 72 x 35)
• Check the right angle in all corners.

TASK 2 :

• Check the raw material for its size as per drawing. • File R 15 and form the convex surface.
• Remove the burrs if any. • Ensure that half the punch mark is visible.
• File the references surface flat. • Check the profile with a radius gauge.

• File the two adjacent sides flat and square to each other • File the 20mm width 10mm deep 'V' groove first with a
as well as with top surface. square file starting at the centre.
• Mark the dimensions as per the drawing to file and finish • Hold the piece in the vice so that one of the angular
the block 60 x 60 x 11mm deep. edges of the groove is parallel to the edge of the jaw.
• Mark horizontal, vertical, angular and curved lines as • File with knife-edge file to finish the surface.
per the drawing using scribing block and dividers.
• Repeat the procedure for the other edge of the groove.
• File step 40mm width, 10mm deep.
• Repeat for the 2nd 'V' groove with the same procedure.
• File 2nd step 20mm width, 20mm deep using a safe • Deburr the edges.
edge file.

Producltion & Manufacturing : Turner - Exercise 1.2.15 45