IEC 60068-2-75 Impact Testing Machine - 1J Spring Operated Impact
Hammer
Example of spring hammer test apparatus
Figure E.1 shows an example of a spring hammer test apparatus
complying with Clause 5, for energies not exceeding 1 J. The mass
of the body assembly is 1250 g ± 10 g. The hammer head is fixed to
the hammer shaft in such a way that the distance from its tip to
the plane of impact (the plane of the cone truncation), when the
striking element is on the point of release, has approximately the
value shown for the spring compression in Table E.1 . Impact Testing Machine
The cone has a mass of approximately 60 g and the cone spring is
such that it exerts a force of approximately 5 N when the release
jaws are on the point of releasing the striking element. The
release mechanism springs are adjusted so that they exert just
sufficient pressure to keep the release jaws in the engaged
position. Impact Testing Machine
The apparatus is cocked by pulling the cocking knob back until the
release jaws engage with the groove in the hammer shaft. The
release cone of the test apparatus is pushed against the prescribed
position(s) on the specimen, perpendicular to the surface of the
specimen. The pressure is slowly increased so that the cone moves
back relative to the body of the apparatus until it is in contact
with the release bars, which then move to operate the release
mechanism and allow the hammer to strike the specimen.
Impact Testing Machine
Standard: IEC 60068-2-63, IEC 60068-2-75 test Ehb, IEC 60335-1, IEC 60598-1,
IEC 60950, and IEC 60065
Application: This device is intended to test the impact resistance to shell,
operating arm, handle, knob, indicator lights and shades of
electrical appliance for household or similar purpose, to verify
the safety performance and strength of the product.
Test sample: Shell, operating arm, handle, knob, indicator lights and shades
Feature:
1. The impact hammer is composed of three parts:
A. Shell. Includes housing, impact element guide and release
mechanism, and parts fixed on these parts.
B. Impact element. Including the hammer, hammer tail and firing
handle.
C. Release cone.
2. Working principle
The hammer generate impact energy by the mass and movement of
impact element. When pulling the operating handle, release claw
stop at the impact element release point, the hammer spring is
pressed, when the compression quantity is different, the spring
will release the different energy. For multi energy impact hammer,
rotate the end cover to select corresponding impact energy. The
impact energy was calibrated on calibration facility before
delivery. Impact Testing Machine
Parameters:
| Model | SH-0.14/SH-0.2/SH-0.35/SH-0.5/SH-0.7/SH-1 | SH-2 | SH-5 | SH-6 |
| Impact energy(J) | 0.14; or 0.2; 0.35; 0.5; 0.7; 1.0 | 2±0.1 | 0.2 and 0.35, 0.5, 0.7, 1 | 0.14 and 0.2, 0.35, 0.5, 0.7, 1 |
| Impact element mass | 250g±5g | 500g±5g | 250g±5g | 250g±5g |
| Overall mass | 1250g±10g | 1500g±10g | 1450g±10g | 1450g±10g |
| Material | Stainless steel | Stainless steel Impact Testing Machine | Stainless steel | Stainless steel |
