Page 138 - CITS - Fitter Trade Practical - Volume -2

FITTER - CITS

4 Disc Stylus
5 Articulated Holders

Inspection
Inspection can be defined as the activity to examine the products, its components, sub-assemblies, or materials
out of which it is made, and to determine whether they adhere to design specifications.

A CMM (coordinate measuring machine) inspection is where objects for products can be inspected for quality and
measured. A Coordinate Measuring Machine is used to measure the dimensions and characteristics of an object.
It can measure a single point in a 3D shape or the whole shape.

There are two types of inspection techniques
1 Contact inspection
2 non-contact inspection
Contact inspection techniques

Physical contact occurs between the object to be inspected and the measurement device in contact inspections
this is typically done by means of a mechanical probe or other device that touches the item, which allows the
inspection procedure to occur.

Non-contact inspection techniques
Physical contact does not occurs between the object to be inspected and the measurement device in non con-
tact inspection, this is typically done by means of a laser probes and vision probes or other device that does not
touches the item, which allows the inspection procedure to occur. uses a sensor to measure or gauge the desired
features of the object.

Classroom Assignment (Fig 1)
Calculate the distance C of the dovetail of the roller is 20 mm, angle is 60o and the distance between the rollers
is 2.68 mm

Fig 1

Cutting and threading of pipe length

Objectives : At the end of this exercise you shall be able to
• mark and cut pipe to length using pipe cutter
• mark and cut pipe to length using hacksaw.

Job Sequence

• Hold the G.I pipein pipe vice tightly.
• Mark the required length as per drawing.
• Fix the pipe in pipe vice and tighten it to prevent it from rotating.
• Fix the pipe cutter on the G.I pipe.

• Cut G.I pipe for the required length using pipe cutter.
• Remove burrs using pipe reamer.
• Check that the pipe ends with try square for squarness.

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CITS : C G & M - Fitter - Exercise 83 & 84