INTRODUCTION OF FITTING SHOP
The term Fitting is related to the assembly of parts, after bringing the dimension or shape to the required size or form, in order to secure the necessary fit. The operations required for the same are usually carried out on a workbench, hence the work is done on the bench is called Fitting work.
The bench work and fitting play an important role in engineering. Although in today's industries most of the work is done by automatic machines which produce jobs with good accuracy still it requires some hand operations called fitting operations. A fitting shop worker is called Fitter.
Bench Vice
The bench vice is a holding device which is used to hold the workpiece when performing Filling and Cutting on the job. Bench vice has two jaws one is fixed (Stationary jaw) and another is movable (Sliding jaw). Sliding jaw slide over the slide face, when the handle is rotated in the clockwise direction it is subjected to tight by mean of the thread which is mounted on the rod. The body is not movable to any direction is called a fixed body and the lower part of bench vice is called base.
It is a steel wire which has one end is sharp and hardened to mark a line on the metallic piece.
Measuring and Marking Tools.
It is a steel wire which has one end is sharp and hardened to mark a line on the metallic piece.Cutting Tools.
Hand hacksaw
Hand hacksaw is a cutting tool which is used in the fitting shop for manual cutting. It has three parts, Handles, Hacksaw frame, and blade. The blade is made of high-speed steel or high carbon steel and the frame is made of mild steel. The blade is adjusted with the help of wing nut. The teeth of a blade generally forward direction.
Striking Tools.
Hammers
The tool generally used in a fitting shop for striking is called Hammer. These are used for chipping, hammering and fitting. The weight range of the hammer is 0.25 kg to 2 kg.
Important Link:-Fitting Shop Tools Name
Some example of Fitting work.
To makes a Square fit from the mid steel pieces.
MATERIALS REQUIRED: Mild steel flat (40*40*5mm).
TOOLS AND EQUIPMENT REQUIRED:
1.6” try square
2.6” scribe
3.Odd leg caliper
3.12” Hacksaw Frame
5.10” rough file
6.10” smooth file
7.10” Square file
8.Dot punch
9.Ball peen hammer (0.5 Ib).
10.Steel Rule
1.Filling
2.Marking
3.Punching
4.Sawing
5.Filling
6.Finishing
PROCEDURE:
1. To check the dimensions of a given mild steel piece.
2. One edge of given is filled to straightness with rough and smooth files and checked with a try square.
3. An adjacent is also filled such that is square to the first edge and checked with a try square.
4. Wet chalk is applied on one side of the flat and dried for making.
5. The mark on the job according to a given design, using scriber or odd leg caliper and steel rule.
6.using the dot punch is made along the marked lines.
7. The excess materials removed from the remaining two edges with try square level up to half of the marked dots.
8. Finally, buts are removed by the filling on the surface of the fitting job.
PRECAUTIONS:
1. Must use the try square for perpendicularity.
2. Finishing off the job will be always with a smooth file.
3. Marking is done without parallax error.
