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BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI
Publicat de
Universitatea Tehnică „Gheorghe Asachi” din Iaşi
Tomul LVI (LX), Fasc. 2, 2010
Secţia
CONSTRUCȚII DE MAȘINI
EXPERIMENTAL RESEARCHES REGARDING A NEW
METHOD FOR CUTTING FORCES EVALUATION
BY
MIRCEA COZMÎNCĂ, CRISTIAN CROITORU
and CĂTĂLIN UNGUREANU
Abstract. The paper presents some preliminary experimental researches
regarding the cutting forces level when cutting four types of steel. The aim of
these tests is to finalize the calculus models for cutting force components Fz, Fx, Fy on a cutting tooth. The new models are considering the area of the chip’s
theoretical cross section (txs), the compression yield point of the cut material and
the chips contraction coefficient, as presented in our previous papers. The chips
contraction coefficient includes all the working parameters’ influences and also
the interdependencies between them. Beside those elements, the calculus models
contain a theoretical component, depending on the constructive angles of the tool,
γ, K and λ and the friction coefficient between chips and the cutting tool’s rake
face.
Key words: model, chips contraction, cutting force, experimental.
1. Introduction
The previous papers [1]-[4] were presented the new calculus models for
cutting force evaluation (Eqs. 1), that could replace the traditional equations for
Fz, Fx, Fy components. The theoretical quantities Cz, Cx, Cy in Eqs. (1) result
using the Eqs.(2) and (3), if the chips deviation angle η=0 [5], and with Eqs.(4)
if η≠0.
(1)
F
F
F
z
x
y
= C
= C
z
= C
x
y
σ
σ
σ
o
o
o
t s
t s
t s
C
C
C
1+
m
d
z
1+
m
d
x
1+
m
d
y
,
,
.