Expt No.5.3
Date:
TAPERED RECTANGULAR TRAY
Aim: To make a tapered rectangular tray
Materials required: 24 SWG galvanized iron sheet of size 210x150 mm.
Tools required:
a) Measuring and marking TOOLS:- 1. Steel rule 2. Try square 3. Vernier height Gauge
4. Surface plate 5. V block. 6. Scriber. 7. Prick punch
b) Striking tools : 1. Ball peen hammers 2. Mallet.
c) Holding tools : 1. Bench vice
d) Cutting tools : 1. Triangular file 2. Straight snips
Operations to be carried out: marking, cutting, folding, and riveting/soldering
Procedure:
1. Copy down the fig of the model in the rough book and collect the work piece.
2. Check the suitability of material to make the model using steel rule.
3. Find out the best two sides of the supplied sheet and make the adjoining sides of the corner exactly 90°
4. Keep the best sides on the surface plate and mark the required size on the sheet and remove extra length to make the sheet exactly a rectangle of size 210x150 mm
5. Mark the development of the tray in the given sheet using vernier height gauge, and scriber. Mark the area to be cut and removed with prick punch. Also mark the end of folding line with prick punch.
6. Cut and remove the portion and fold all the 10 mm edges first in one direction by fixing it on the bench vice to about 20° to the horizontal.
7. Now fold through the 35 mm line in the opposite direction on the longer sides by holding in the bench vice.
8. Now fold through the 35 mm line in the opposite direction on the shorter sides by using a square stake.
9. Fold the tabs of all the corners to lock the adjacent sides together.
10. Punch the Roll No in the side of the tray and submit for evaluation.
Result: The required model of tapered Rectangular tray is obtained
Date:
TAPERED RECTANGULAR TRAY
Aim: To make a tapered rectangular tray
Materials required: 24 SWG galvanized iron sheet of size 210x150 mm.
Tools required:
a) Measuring and marking TOOLS:- 1. Steel rule 2. Try square 3. Vernier height Gauge
4. Surface plate 5. V block. 6. Scriber. 7. Prick punch
b) Striking tools : 1. Ball peen hammers 2. Mallet.
c) Holding tools : 1. Bench vice
d) Cutting tools : 1. Triangular file 2. Straight snips
Operations to be carried out: marking, cutting, folding, and riveting/soldering
Procedure:
1. Copy down the fig of the model in the rough book and collect the work piece.
2. Check the suitability of material to make the model using steel rule.
3. Find out the best two sides of the supplied sheet and make the adjoining sides of the corner exactly 90°
4. Keep the best sides on the surface plate and mark the required size on the sheet and remove extra length to make the sheet exactly a rectangle of size 210x150 mm
5. Mark the development of the tray in the given sheet using vernier height gauge, and scriber. Mark the area to be cut and removed with prick punch. Also mark the end of folding line with prick punch.
6. Cut and remove the portion and fold all the 10 mm edges first in one direction by fixing it on the bench vice to about 20° to the horizontal.
7. Now fold through the 35 mm line in the opposite direction on the longer sides by holding in the bench vice.
8. Now fold through the 35 mm line in the opposite direction on the shorter sides by using a square stake.
9. Fold the tabs of all the corners to lock the adjacent sides together.
10. Punch the Roll No in the side of the tray and submit for evaluation.
Result: The required model of tapered Rectangular tray is obtained