Vol.1, No 7, 2000 pp. 887 - 891
UDC 621.962 621.744.52
THE BOUNDARY VALUES OF THE PUNCH
DIAMETER
IN THE TECHNOLOGY OF THE OPENING MANUFACTURE
BY PUNCHING
Jelena Vukićević Milovanović, Predrag Janković
Faculty of Mechanical Engineering, Beogradska 14, 18000 Niš
Abstract. In the technology of the opening manufacture by punching
there is a boundary value of the punch diameters that classifies the punches
into normal and thin ones. In this way two domains in which various tool
designs and in which the material splitting processes are clearly separated.
Instead of the empirical determination of the boundary diameter, the
paper starts from a relative ratio between the sheet thickness and the
opening diameter as well as from the mechanical properties of the material
of both the tool and the workpiece in order to present the procedure for
determining the boundary diameter based on the current knowledge in this
field.
Key words: Punching, Thin Punch, Plasticity Technologies, Sheet,
Tool
GRANIČNA VREDNOST PREČNIKA PROBOJCA
U TEHNOLOGIJAMA IZRADE OTVORA PROBIJANJEM
U tehnologi izrade otvora probijanjem postoji granična vrednost prečnika
probojca koja ih deli na normalne i tanke probojce. Time se razgraničavaju
dva područja u kojima su različita konstruktivna rešenja alata i u kojima
se razlikuju procesi razdvajanja materijala.
U radu se umesto empirijskog odredjivanja graničnog prečnika - polazeći
od relativnog odnosa debljine lima i prečnika otvora, kao i meaničkih svojstava
materijala alata i obradka kao relevantnih uticajnih faktora - prezentira
postupak odrejdivanja graničnog prečnika zasnovan na današnjim saznanjima
u ovoj oblasti.
Ključne reči: Probijanje, tanki probojac, tehnologije plastičnosti,
lim, alat.
