IS 9873-4 /ISO 8124-4 Alu Alloy Impact Head For Swing Elements Without Accelerometer
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ISO 8124-4 Impact Head from swing elements (without Accelerometer)
Product Information
Test mass, consisting of an aluminium sphere or semi-sphere of
radius 80 mm ± 3 mm, and a total mass
(including accelerometer) of 4,6 kg ± 0,05 kg. The impacting part
between the surface struck and the
accelerometer shall be homogeneous and free from voids. Cables
connected to the accelerometer shall
be placed in such a way that the effect on the mass of the test
mass is minimized
Test Standard
ISO8124-4 6.4.1
Procedure
Assemble and install the swing element to be tested in accordance
with the manufacturer's instructions.
Suspend the swing with the means of suspension that has been
supplied with the swing and at the maximum
height that these permit. If ropes or cables are the means of
suspension, they may need to be stretched in
order to allow smooth travel when the swing is released during the
test. If needed, apply a load of, for example,
5 kg to the end of each rope or cable and leave it for 6 h or until
the ropes or cables have been straightened.
Adjust all parts of the set-up so that the suspending chains for
the test mass are parallel to the means of
suspension for the swing element.
Suspend and adjust the test mass so that the contact point of the
swing element and the centre of the test
mass are in the same horizontal plane as the centre of gravity of
the test mass. Ensure that the chains for test
mass are not twisted and that the test mass hangs in a vertical
line.
Affix an index mark to the side of swing elements that are
supported by chains, ropes, cables or other
non-rigid suspending elements. The index mark may be on any part of
the suspended member that is
immediately below the pivot point in the free-hanging rest
position.
Swing elements that are supported by chains, ropes, cables or other
non-rigid suspending elements shall be
raised along their arc of travel until the side-view projection of
a straight line through the pivot point and index
mark forms an angle of 60° ± 1° with the vertical. Once the
suspended member is raised to the test position,
some curvature will be produced in the suspending elements. Adjust
the suspended member position to
determine that curvature which provides a stable trajectory.
ISO 8124-4 Impact Head from Swing Elements.pdf
IS 9873-4 /ISO 8124-4 Alu Alloy Impact Head For Swing Elements Without Accelerometer
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