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Spring hammer function and usage manual
1. Spring hammer is suitable for household and similar electrical appliances, electronic products, lamps, electrical attachment shell, lever handles, hand shank, knobs, indicator lights, signal lights, lampshades and other mechanical strength tests, to ensure that they are able to withstand likely occurred reckless operation, and other accidents, so that electrical products can be normally and safely operated.
2. Technical specifications
Shell materials: stainless steel total weight: 1250 g.
Specification: monotonous CJ-2
The impact energy: 0.1 J ~ 1 (1250 g)
Monotonous CJ-3
The impact energy: 2 J (2 J weight: 1500 g)
Many file type: CJ-5
The impact energy: 0.2 J, 0.35 J, 0.5 J, 0.7 J, 1 J (adjustable)
3. Use method
(1) . Fix samples according to regulations, and then choose required impact point.
(2) . Pull spherical kneads hands of the impactor until released claw stuck hammer handle to make it in the ready state.
(3) . Make the axial of the impact and the product surface vertical, and then slowly push the impact to be functioned.
Appliance should have enough mechanical intensity, and its structure should stand rough handling in normal use.
Impact the appliances through impact test apparatus with spring driving according to IEC817 to check eligibility of its instruments.
When appliance is supported by rigid prop, you should hit three times on every possible weak spot of shell in instruments with 0.5 J + /-0.04 J of impact energy.
If needed, handle, operation lever, knob and similar components as well as the lights and the cover can be also hit. But outstanding shells of these lamp or cover should be more than 10 mm or their surface area should be more than 4Cm2. The light and its chimney can be tested only when they can be damaged in normal use.
After test, appliances should show significance of damage beyond the standard especially 8.1, 15.1 and 29.1 degrees should not be damaged. When there is any doubt, additional insulation or reinforced insulation should be subjected to 16.3 electric strength tests.
If there is doubt that a defect is cause by the attack or not, then the defect can be ignored. Then hit the same point of the new sample three times as a group.
4. Attention
After impact calibration, do not remove and adjust the compression spring, or it will influence the impact energy.
Vertical combustion performance test is for the determination of plastic surface frame propagation test such as cable burning experiment. According to certain flame height and certain flame angle, make several fires to horizontal or vertical state sample. Assess the samples' burning features according to their heating and light burning duration, the possibility of ignites under the samples. It is available for plastic industry, inspection department and scientific research.
Now we take 50 W / 500 W comprehensive model for example. This device meets UL94, 94 HB, 94-5 VA, 95-5 VB, GB5169, GB11020 standard.
Its performance parameters are as follows
Timing device 9999 X0. 1 s 9999 X0. 1 s
Burning angle 0 °, 20 °, 45 ° 0 °, 20 °, 45 °
Flame height 20 ~ 175 mm 50 ~ 255 mm
Flame blower standard IEC60695-11-4 IEC60695-11-3
Temperature detection MAX 1100 ° C MAX 1100 ° C
Gas flow 105 + 5 ml/min 965 + 30 ml/min
Gas pressure 0.1 Mpa / 300 mm water 0.1 Mpa / 125 + 5 mm
Water calibration time 44 ± 2 S 54 ± 2 S
Flow precision 1% 1%
Copper weight 1.76 g + /-0.01 g 10 ± 0. 05 g
Gas category Methane
This device can be used for horizontal vertical test. You can move around screws for clamp installation and use hand wheel for direction regulation with convenient operation.
5. Terminology and definitions
Residual flame: the continued material flame under specified conditions after lighting source is removed.
Time: last time
Afterglow: when flame is stopped or flame is not produced, continuous glow of the material after removing ignites source under the required experimental condition.
Time: the duration of the afterglow.
Principle: fixed one end of rectangular strip in horizontal or vertical fixture, the other end needs to be exposed to the test flame. By measuring the linear burn rate, evaluate its horizontal burning level; By measuring the time of residual flame and afterglow, the burning scope and the situation of burning distill particles, evaluate its vertical burning level.
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