Page 138 - CITS - Fitter - Trade Theory

FITTER - CITS

• Operation Performed Using Press Tool:
Press tools, also known as stamping dies, are essential in the manufacturing process for shaping and cutting sheet
metal into desired forms. They are used in various industries, including automotive, aerospace, electronics, and
appliance manufacturing. Here’s an overview of the basic operations involved in using a press tool:
1 Blanking: This operation involves cutting out a flat shape from a metal sheet. A blanking die consists of a
punch and a die that work together to cut the desired shape from the sheet material.
2 Piercing: Piercing is the process of creating holes in sheet metal. It is similar to blanking but involves cutting
out a hole instead of a complete shape. Piercing dies consist of a punch and die with a hole-shaped cavity.

3 Forming: Forming operations bend, stretch, or reshape sheet metal into desired contours or shapes. This can
include operations such as bending, drawing, embossing, and coining. Forming dies are designed with contours
that shape the metal into the desired form when pressure is applied.
4 Coining: Coining is a precise forming operation used to create precise features or patterns on the surface of
the metal. It involves applying high pressure to the metal between specially designed coining dies to produce
the desired shape or pattern.
5 Extruding: Extrusion is a process used to create long, continuous shapes by forcing metal through a shaped
opening in a die. It is commonly used in the production of components with complex cross-sections, such as
rails, tubes, and rods.
6 Trimming: Trimming removes excess material from the edges of formed parts to achieve the final desired
shape. Trimming dies are used to cut off excess material after forming operations, ensuring the part meets
dimensional and geometric requirements.

7 Drawing: Drawing involves forming a flat sheet metal blank into a three-dimensional shape, such as a cup or
shell. It is achieved by pulling the metal blank through a die cavity using a punch, gradually shaping it into the
desired form.

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CITS : CG & M - Fitter - Lesson 21 CITS : CG & M - Fitter - Lesson 21