Table 2 Conditions of the experimental tests conducted on the aluminum tube.

From: Parametric study of piercing force and surface quality in elastomer-assisted tube piercing

Number

Tube Thickness (mm)

Polyurethane Diameter (mm)

Polyurethane Hardness (Shore-A)

With/Without Backup Punch

T01

1

33

85

×

T02

1

33

85

√

T03

1

33

50

×

T04

1

33

50

√

T05

1.4

32.2

85

×

T06

1.4

32.2

85

√

T07

1.8

31.4

85

×

T08

1.8

31.4

85

√

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