Forjamento

Metal Forming ‐ 3 (Forging of Metals)
Assoc Prof Zainal Abidin Ahmad FKM UTM

Lecture Outline
1. 2. 3. 4. 5. 6. Introduction Forging operations Classification of forging processes Closed and open die forging process Effect of forging on microstructure Other forging related processes
– Coining – Swaging – Roll forging

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7. Typical forging defects Abidin Ahmad Assoc Prof Zainal

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1. Introduction

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Introduction
• Typical forged products are such as gears, connecting rods, bolts

Landing-gear components for the C5A and C5B transport aircraft, made by forging
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Steps involved in forging a bevel gear with a shaft.
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2. Outline of Forging and Related Operations

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Forging Operations

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Forging Operations

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Forging Operations

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3. Classifications of forging processes
• By equipment
– Forging hammer or drop hammer – Press forging

• By process
– Open die forging – Closed die forging Closed die forging

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Forging machines

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Hammer and press forging processes
• Forging hammers
– Board hammer – Power hammer

• Forging presses
– Mechanical press – Hydraulic press Hydraulic press

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Board hammer – forging hammer

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Forging hammer or drop hammer

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• Example of forging hammer or drop hammer • The energy The energy supplied by the blow is equal to the potential energy due to the weight of the ram and the height of the fall