1. 1 Manufacturing process II. Manufacturing process II. Sándor Pálinkás Ph.D. assistant lecturer University of Debrecen, Faculty of Engineering, Department of Mechanical Engineering

2. 2 Introduction  History of metalforming,  Definitions,  Bulk deformation processes,  Sheet metal forming processes.

3. 3 History of metalforming b.c. 7000 – happened the casting of copper and gold; b.c. 4000 – the first sheet forming; b.c. 3000 - producing of tin, lead and silver; b.c. 1400 – sheet forming by pressing; b.c. 1200 – appeared the first artifical ironproduct; b.c. 900 – 800 metal hammers used for forging; 1500 – producing of raw iron, with 3-5% carbon; 1700 – sheet rolling; 1856 - Steel producing by Siemens-Martin method; 1850-es developing of cold formed processes; 1912 – producing of the first stainless steel (Cr-Ni steel); 1920 – Producing of unalloyed Ti metal; Mesopotamian copper vase b.c. 3000! Source: http://claw.fw.hu/History/mezopotamia.html

4. - material saving - energy saving - improve the characteristics of material - more economical MetalformingMachining SZERSZÁM!MACHINE! MachineTools Advantages of metalforming

5. Plastic Deformation Processes Operations that induce shape changes on the workpiece by plastic deformation under forces applied by various tools and dies. Bulk Deformation Processes These processes involve large amount of plastic deformation. The cross-section of workpiece changes without volume change. The ratio of cross-section area/volumes is small. For most operations, hot or warm working conditions are preferred although some operations are carried out at room temperature. Sheet-Forming Processes In sheet metalworking operations, the cross-section of workpiece does not change—the material is only subjected to shape changes. The ratio of cross-section area/volume is very high. Sheet metalworking operations are performed on thin (less than 6 mm) sheets, strips or coils of metal by means of a set of tools called punch and die on machine tools called stamping presses. They are always performed as cold working operations Definitions

8. 8 Thank you for your attention!