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Lecture+7a+-+Extrusion+and+Wire+Drawing

Lecture+7a+-+Extrusion+and+Wire+Drawing - Bulk Bulk...

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Bulk Processes Bulk Processes – Extrusion and Wire Drawing Lecture 7.a ISE 2204 – Introduction to Manufacturing Processes Dr. Jaime Camelio March 2 nd , 2010
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Manufacturing Processes Bulk Processes Extrusion Definition Diff t E t i P Different Extrusion Processes Wire Drawing Definition ISE 2204 – Introduction to Manufacturing Processes – Spring 2010 Outline
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Casting Processes Bulk Deformation Processes Sheet Forming Processes C tti P Cutting Processes Additive Processes Joining Processes ISE 2204 – Introduction to Manufacturing Processes – Spring 2010 Manufacturing Processes
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ISE 2204 – Introduction to Manufacturing Processes – Spring 2010 Bulk Deformation Processes
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Developed in late 1700s for producing lead pipe A round billet is placed in a chamber and forced through a die opening by a ram Can be done cold or at elevated temperatures Consistent cross-section ISE 2204 – Introduction to Manufacturing Processes – Spring 2010 Extrusion
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(a)-(c) Examples of extrusions and products made by sectioning them. (d) Examples of extruded cross-sections. Source: Kaiser Aluminum and Plymouth Extruded Shapes. ISE 2204 – Introduction to Manufacturing Processes – Spring 2010 Extruded Products
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Direct extrusion (a) Indirect extrusion (b) Hydrostatic extrusion (c) I t t i (d) Impact extrusion (d) ISE 2204 – Introduction to Manufacturing Processes – Spring 2010 Types of Extrusion
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Direct Extrusion – Bar Example Direct Extrusion Bar Example Direct Extrusion – Tube Example ISE 2204 – Introduction to Manufacturing Processes – Spring 2010 Extrusion Process Extrusion Process – Direct Extrusion Direct Extrusion
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Frequently square dies are used with hot extrusion In this case dead zone Frequently square dies are used with hot extrusion. In this case formation takes place, as the metal seeks to move along a path of least resistance. Container Die Extrusion When ram reaches this position coring begins Dead zone Extrusion carried out below the recrystallization temperature is consider cold extrusion. Pressures can range up to three times the finished yield strength.
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