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Anglicky v odbornch pedmtech"Support of teaching technical subjects in EnglishTutorial: Engineering technology

Topic: Volume forming swage forging

Prepared by: Ing. Elena Nov

Projekt Anglicky v odbornch pedmtech, CZ.1.07/1.3.09/04.0002je spolufinancovn Evropskm socilnm fondem a sttnm rozpotem esk republiky.

Volume forming swage forging

Swage forging serves for production of large number of identically shaped steel parts or other alloys. Die block is mainly two parts tool.Upper and lower (bottom) die. Main advantage of swage forging is high productivity and easy operation. Disadvantages are limited dimension and mass. Volume forming swage forging

Heated material is inserted into opening in bottom die, shaped to final forged piece subsequently the upper die is pressed against the bottom die. All dimensions are extended by shrinkage value of the forged part. Volume forming swage forging

For die forging a power hammer and presses are used. Die opening is filled up either by ramming or hobbing. hobbing is easier. Volume forming swage forging

Die forging consist of:Heating up to forging temperatureRough forge / adapt the shape to die cavityForging to die blockBurr cutting off

Pressing die block Forging die blockVolume forming swage forging

In case of more complicated shapes is necessary to forge into more die cavities, which ensure better material flow multiple-impression.1-3 blocking / preliminary forging4-5 - burr cuttingVolume forming swage forging

Example of die blocks:

Knife forgings:Volume forming swage forging

Multiple impression die for power hammer (1 lengthening, 2 division, 3 blocking, 4 forging, 5 finishing mould cavity and semi-product)Volume forming swage forging

Final treatment of forged piece:Cutting off burrPunchingCalibration

Volume forming swage forging

Before forging die block must be preheated to 250 deg. C.Working surfaces are lubricated with oil and graphite mixture. Finished product is soft annealed.Examples of die forgings:Volume forming swage forging

What is a drop forging - swaging.How is the die divided. Main advantages of swaging.By what parameters are increased the final product size?What mechanical machines are used for die forging / swaging?Answer these questions:

How do we call forging by impact?How is forging by steady pressure called?Name for stages of swaging.When do we forge in progressive dies?Describe final treatment of forged pieces.Answer these questions:

http://www.firmconsult.cz/cz/vykovky-vylisky/http://www.ksp.tul.cz/cz/kpt/obsah/vyuka/skripta_tkp/sekce/03.htm

Used literature