Page 281 - Modular design for machine tools

240 Engineering Design for Machine Tool Joints

Equivalent solid
Tangential joint stiffness per unit area K su , kgf/mm . 1/mm 2

0.10
Ground
joint

Joint material: FC25
Joint surface: Scraped
0.05
Number of contact spots
per in 2
5
10
15
20
30
0
0.5 1.0 1.5 2.0 2.5
Interface pressure p, kgf/mm 2
Figure 6-16 Effects of surface finishing quality on joint stiffness.

Single loading

(Boothroyd et al., 1972 [24])

(Simkins, 1967 [31])
(Hisakado et al.,
1978 [28])
(Masuko et al.,
1972 [22])
(Kirsanova, 1967 [19])

1960 1970 1980 1990 2000

(Masuko et al., 1974 [23])

(Burdekin et al.,
1978 [26, 27])

(Rogers & Boothroyd,
1975 [25]) Repeated loading
Figure 6-17 Firsthand view for research into static joint stiffness under tangential loading
and normal preload.