Tutorial: Engineering technology Topic: Forming Mills Prepared by: Ing. Elena Nová Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je.

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2 Tutorial: Engineering technology Topic: Forming Mills Prepared by: Ing. Elena Nová Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

3 Forming Mills

4 Most important forming mills: Rolling mills Presses Bending machines

5  Rolling mill  Two-rolled, three-rolled, universal  Using:  Sheet manufacturing  Profile bars(I, U, rails)  Wires

6  Presses  Presses are divided according to purpose:  Forming  Forging  According to drive:  Mechanical presses  Hydraulic presses

7 Hydraulic press Usage Big forgings from ingots Deep drawing Hot extrusion Stamping Cold extrusion Usually vertical Two pillars Four pillars (more often) Small presses: Single plunge Bigger presses: Three plunge with ability to engage individual plungers -> increase of pressure

8  Mechanical press  Usage:  Drop forging  Deep drawing  Shearing  Stamping  Cold extrusion  Bending

9  Forging press - spring  power hammer  Usage:  Forging die  Free forging  Propulsion: From electromotor through friction transmission to flywheel From crankshaft by mechanical levers to a ram Ram speed (ram blow) is increased due to upper two arm lever is made from pack of spring-leaves

10  Drawing press

11  Compressed air hammer  Usage:  Free forging  Consists of: a) Stand Working cylinder Ram made as a plunger is moved inside -> is driven by compressed air Compressor’s cylinder b) Anvil block

12  Eccentric press

13  Press brake Blanking press

14  Forging rolls  Usage:  Precision forgings  Pre-forging of products with variable profiles  Not working continuously, but with jumps Cylinders are placed on stands turning against each other, calibrated only on one half of circumference

15  Bending machine

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17  http://www.ksp.tul.cz/cz/kpt/obsah/vyuka/s kripta_tkp/sekce/04.htm http://www.ksp.tul.cz/cz/kpt/obsah/vyuka/s kripta_tkp/sekce/04.htm  http://strojirenstvi- ucivo.blogspot.com/2011/03/384151- tvareci-stroje-pro-volne-kovani.html http://strojirenstvi- ucivo.blogspot.com/2011/03/384151- tvareci-stroje-pro-volne-kovani.html