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BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI
Publicat de
Universitatea Tehnică „Gheorghe Asachi” din Iaşi
Tomul LVI (LX), Fasc. 2, 2010
Secţia
CONSTRUCŢII DE MAŞINI
COMPARATIVE ASPECTS REGARDING THE NESTING
FOR BLANKING-PUNCHING OPERATION ON
CLASSICAL PRESSES AND NUMERICAL
COMANDED PRESSING CENTERS
BY
MARIUS - IONUŢ RÎPANU 1 GHEORGHE NAGÎŢ 1 ,
IOLANDA - ELENA MANOLE 1 and ANDREI WEINGOLD 2
Abstract. The nesting operation represents an important chapter in the design
of stamping technology of parts or blanks in the area of cold plastic forming
processes, with a large applicability in industry. The type of nesting has a very
important role in determining the material consumption, the number of blanks cut
concomitant, in determining the type and the construction of the stamping device
or of the punch. The goal of this paper is to elaborate a comparative study
between nesting for the classical presses stamping and for the CNC pressing
centres. In order to obtain this goal, in this paper a case study, along with the
results obtained and the associated conclusions are presented.
Key words: punching, blanking, stamping press, CNC, nesting.
1. Introduction
The nesting of the blanks is a problem of special importance in the area of
cold plastic forming processes. By nesting the blanks we understand the optimal
cutting of metal sheets into individual blanks or strips. We understand as well
the judiciously positioning or placing on metal sheets or strips the plan
components as structured technological forms used to detach the pieces in order
to get a minimum amount of waste scrap and an optimum coefficient of material
utilization [1].