The Impact Tester for automobile rear view mirrors consists of a pendulum capable of swinging about two horizontal axes perpendicular to each other. One of the axes is perpendicular to the vertical plane containing the release trajectory of the pendulum. The other axis is at right angle to this axis and serves to move the pendulum away from the vertical plane in which the impact point of the mirror is located. Th-e lower end of the pendulum carries a rubber lined spherical hammer formed by a rigid metal sphere.
- The pendulum can be held at the specified angle from the vertical and released from that position with the help of a pneumatic cylinder. The pneumatic system consists of an air filter / regulator / lubricator and a solenoid valve operated by a push button. The angle is indicated on a digital indicator with a least count of 0.1º. The release angle is also adjustable.
- An arrangement to arrest the pendulum at the highest angle attained by it after the impact is also provided. The releasing angle and the maximum angle attained after impact are indicated on a digital indicator.
- The mirror under test is held on a plate to give it the specified impact. This plate can be moved in up or down, left or right, and front or back directions with the help of a three-directional movement arrangement provided with the tester.
- All the components are mounted on a rigid fabricated steel frame. The tester is finished in grey hammertone painting and bright chrome plating to give it a corrosion resistant finish.
|Hammer :||165 ± 1 mm diameter with a 5 mm thick rubber lining of 50 ± 5 Shore A hardness|
|Distance of center of hammer from pivot axis :||1,000 ± 5 mm|
|Mass of pendulum at center of hammer :||6.80 ± 0.05 kg|
|Angle of release of pendulum :||60° - Adjustable|
|IS 14210 - 1994 :||Automobile Vehicles - Rear View Mirrors|
|JIS D 5705 :||Mirrors for Automobiles|
|InterEurope ECE Regulation No. 0.08.39 :||Rear View Mirrors Clause 8.2: Impact Test|