Page 90 - Module DMV20173

4.0 BULK DEFORMATION PROCESSES

3. products made by rolling include: (a) plate, sheet, foil, rod, seamless pipe, and
tubing; (b) shape-rolled products, such as I-beams and structural shapes; and (c)

bars of various cross-section;

4. rolling may be carried out at room temperature (cold rolling) or at elevated

temperatures (hot rolling).;

5. forging process is deformation of the workpiece is carried out by compressive forces
typically applied through a set of dies;

6. forging is capable of producing a wide variety of structural parts with favourable
characteristics, such as strength, toughness, dimensional accuracy, and reliability in

service;

7. the forging process can be carried out at room, warm, or high temperatures;

8. extrusion is the process of forcing a billet through a die to reduce its cross-section or
to produce various solid or hollow cross-sections. This process generally is carried

out at elevated temperatures in order to reduce forces and improve the ductility of
the material;

9. important factors in extrusion are die design, extrusion ratio, billet temperature,
lubrication, and extrusion speed.

REFERENCES

1. Kalpakjian S. And Schmid S. (2006). Engineering And Technology Fifth Edition in SI
Units, Pearson Education, Inc., Upper Saddle River, New Jersey.

2. Steve F.Krar Technology of Machine Tools, Mc Graw Hill, 2005.

BPLK 122 DMV 20173