DATE: 2024-12-23
VIEW COUNT: 465
Bounce Test
IEC 60068 Standard
IEC 60068 is one of the standard series on environmental testing issued by the International Electrotechnical Commission. The IEC 60068 standard series provides a series of environmental test methods for electronic and electrical products to evaluate their performance and reliability under various environmental conditions. The IEC 60068 standard series consists of multiple parts, each part covering different environmental test methods and parameters. The main topic of this section is bounce testing.
01 IEC 60068-2-55
This test is applicable to specimens which, during transportation on the load-carrying platform of wheeled vehicles either not fastened down or with some degree of freedom, may be subjected to dynamic stresses resulting from random shock conditions (bounce). The test may also be used as a simple means of assessing the satisfactory design of a specimen so far as its structural integrity is concerned.
Synchronous circular motion
The motion of the platform of the bounce tester shall be such that each point of this platform describes a circle in the vertical plane with a diameter of 25.5 mm ±0.5 mm.
The peak acceleration of the platform shall be between 1.1gn, and 1.2gn. This can be achieved with a platform driven by eccentrics at a mean shaft rotation speed of (285 ±3) min-1.
The specimen prepared as for transportation, with or without its transport case as prescribed by the relevant specification, shall be placed, without being attached, on the platform centrally between the drive shafts.
The horizontal motion shall be limited by suitable wooden barriers that are periodically impacted by the specimen. These barriers shall simulate the resilient properties of pinewood board 50 mm in thickness.
The horizontal motion of the specimen allowed by the barriers shall be adjusted to a total of 50mm±5mm. that is, the specimen when placed at the centre of the platform in its nominal position, shall have a free movement in any horizontal direction of a nominal 25mm.
The top edge of the barrier shall be not more than 600mm above the platform and shall be at least at the height of the specimen.
02 KRD51 Transportation Bounce Test System
Bounce testing simulates the constant loose cargo state during truck transport. Often times, containers carrying military and civilian hardware (such as: medical supplies, electronics, weaponry, communication devices) travel for extended periods of time and must be transported off-road. All of these items must maintain functionality upon arrival at their destinations.
The purpose of this test is to produce random impacts on the samples similar to those experienced during transportation. When non-fixed equipment is transported on road, it may experience bounces on the vehicle floor, collision and friction with the vehicle floor, and if the impact with the railing of the carriage or with other cargoes is tight or tied to the floor of the carriage, if the restraint still has a small degree of freedom, it will be subject to similar situations as described above.
The severity of these effects depends on the location of the product in the vehicle, the type of road surface (such as potholes, off-grade roads), cumulative transportation time, and the special dynamic characteristics of the product. Products with high rebound characteristics (such as packaging) are prone to bounce when colliding with the vehicle floor, and are more likely to collide with the vehicle baffle plate and other goods. Non-elastic products can be in close contact with the vehicle floor, and will generally not be subjected to severe random impact.
Bounce testing simulates the constant loose cargo state during truck transport. Often times, containers carrying military and civilian hardware (such as: medical supplies, electronics, weaponry, communication devices) travel for extended periods of time and must be transported off-road. All of these items must maintain functionality upon arrival at their destinations.
Technical specifications
Feature
The seated bearings effectively improve the friction between the table and the shaft during the movement of the table, greatly reducing the problem of shaft heating under harsh working conditions, effectively extending the working time of the equipment, and improving the reliability of the equipment.
The enclosure structure is simple and easy to adjust. The use of steel and solid wood structure not only reduces the weight of the enclosure, but also facilitates the long-term operation of the equipment, and the enclosure can basically be adjusted stepless within the maximum and minimum dimensions and does not interfere with each other. Just loosen the screws when adjusting Move all the enclosures, and just tighten the screws when in place.
4-bearing eccentric mechanism results more stable movement of worktable, and accurate control of rotary speed.
Siemens PLC controller with true color touch screen, the operation is simple, and the setting of device parameters is completed through a human-computer interaction interface.
Video
