INCREASE OF THE OPERATING LIFE OF ACTIVE PARTS OF COLD-MOULDING TOOLS
Original scientific paper Heat treatment of active components of cold – moulding tools is a necessary operation to guarantee their functionality. The tools made by this method loose the required quality of durability and period of service and losses caused by their frequent exchange are high. One way we can stop it is by coating the active parts of pressing tools by thin, hard and abrasion resistant deposit that is suitable by definite method of the tool stress.
Strength reanalysis and influence line equation of rack system drive force
The paper deals with strength reanalysis of proposed rack system design. At previous analysis it was found out that the structure does not met the safety and reliability conditions due to exceeding allowable stress. After structure modification the next step will be determination of influence line equation for rack system drive force as its effect is time dependent in operation.
Sheet Metal Forming
Part 1 Processes: uniaxial tension biaxial tension engineering deeper cups stretch-forming compressive instability blanking, bending and springback friction and surface topography lubrication temperature superplasticity in the press shop. Part 2 Materials: steel coated steels aluminium magnesium and titanium stainless steel and copper. Part 3 Tests: biaxial ductility tests deep drawing tests mixed tests buckling test hardness tests other useful tests.