Microsoft PowerPoint - Lecture 9b - Forging

Microsoft PowerPoint - Lecture 9b - Forging - Bulk...

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Unformatted text preview: Bulk Processes Bulk Processes - Forging Forging ISE 2204 Introduction to Manufacturing Processes Dr. Jaime Camelio Lecture 9.b March 19 th , 2009 c Forging c Slab Analysis c Different Forging Processes c Forging Defects ISE 2204 Introduction to Manufacturing Processes Spring 2009 Outline Outline ISE 2204 Introduction to Manufacturing Processes Spring 2009 Bulk Deformation Processes Bulk Deformation Processes General characteristics of bulk deformation processes. c Forging is the process by which workpiece is shaped by plastic deformation by applying compression forces through dies and tooling. c Hydraulic drop hammer ISE 2204 Introduction to Manufacturing Processes Spring 2009 Forging Forging c A family of processes to make discrete parts in which plastic deformation takes place by compressive forces applied through various dies and tooling c Approx. 5000 years old c Wide range of sizes and shapes c Variety of metals ISE 2204 Introduction to Manufacturing Processes Spring 2009 Forging Forging ISE 2204 Introduction to Manufacturing Processes Spring 2009 Open Die Forging Open Die Forging Forging is the process by which workpiece is shaped by plastic deformation by applying compression forces through dies and tooling. P r o d u c e d w i t h a T r i a l V e r s i o n o f P D F A n n o t a t o r- w w w . P D F A n n o t a t o r . c o m c The operation typically involves: 1) Preparing the blank or workpiece 2) For hot forging, heat the workpiece to required temperature 3) For hot forging, preheat and lubricate the dies, and for cold forging, lubricate the blank 4) Forge the billet in appropriate dies and in proper sequence 5) Clean the forging and check its dimensions 6) Perform additional and finishing operations ISE 2204 Introduction to Manufacturing Processes Spring 2009 Typical Forging Operation & Product Quality Typical Forging Operation & Product Quality 7) Carry out inspection for any external and internal defects 1 1 h h h e- = = 1 1 ln h h Engineering and true strain during ODF Strain rate at relative velocity v ISE 2204 Introduction to Manufacturing Processes Spring 2009 Open Die Forging Open Die Forging 1 h v e- = & 1 1 h v- = & rain ow nes psetting lid, ISE 2204 Introduction to Manufacturing Processes Spring 2009 Grain Flow Grain Flow Schematic illustration of grid deformation in upsetting: (a) original grid pattern; (b) after deformation, without friction; (c) after deformation, with friction. Such deformation patterns can be used to calculate the strains within a deforming body....
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Microsoft PowerPoint - Lecture 9b - Forging - Bulk...

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