CXG Safety Helmet Lateral Rigidity Testing Machine

Introduction The instrument is mainly used for the determination of safety helmet lateral rigidity. The testing device consists of frameworkmeasuring force institutionsdisplacement and timing organizationsfixtures and so on. standards IS0 3873-1987, EN 397-1995, JIS T8131-2000, ANSI Z89.1-2003, GB/T 2811-2007 Main technological parameters: 1. Range of measurement: 600mm 2. Accuracy of displacement: 0.1mm 3.Accuracy of time: 1s 4.Power: AC 220V 50HZ Testing methodAt room temperature, set the safety helmet laterally on the place between two flatbed fixtures, the visor extends the outside of the flat, but closely near the bottom line of cap shell. The pressure machine adds pressure to the safety helmet through flatbed, first add 30N to it and keep it for 30s. Test the distance between the two flatbeds. The distance is called for the initial value. Then load at the speed of adding 100N for every minute until reaching 430N and keep it for 30s. Measure and calculate the difference between the distance of the two plates and the initial value, namely, it is the maximum deformation value. Then reduce to 25N, and rise to 30N followed by it and keep the value for 30s. Measure the difference between the distance of the two plates and the initial value; it is namely the residual deformation value.