GB/T19844-2018钢板弹簧刚度试验：负荷通过V形加载块施加。首先缓慢地对弹簧加载到最大试验负荷并卸载到零负荷后，再对弹簧缓慢加载至最大试验负荷后卸载，荷记录加、卸载过程中负荷及对应的变形，绘制负荷与变形的关系曲线。

300kN钢板弹簧刚度试验机；落地式载荷机架；C型结构；300kN刚性销轴；300kN承载力滚轮；浮动式弹簧支撑夹具；滑动式弹簧夹持附具；V形荷载加载块；HRJ Tester；300kN钢板弹簧永久变形试验机；300kN汽车钢板弹簧试验机；300kN钢板弹簧负荷预压试验；钢板弹簧设计弧高试验；钢板弹簧设计弧高允许偏差不大于±7mm；变截面弹簧刚度允许偏差±6％；其他类型弹簧刚度允许偏差±8％；轻型汽车钢板弹簧试验机；重型汽车钢板弹簧试验机；挂车钢板弹簧试验机；HRJ-Test钢板弹簧刚度测试系统；300kN叶片弹簧试验机；弓形板弹簧试验机；等刚度弓形板弹簧试验机；变刚度弓形板弹簧试验机；变截面弓形板弹簧试验机；椭圆形板弹簧试验机；等刚度椭圆形板弹簧试验机；HRJ Tester；变刚度椭圆形板弹簧试验机；悬臂板弹簧试验机；GB/T19844-2018钢板弹簧技术条件；ISO 18137：2015；ISO 683-14；GB/T23925-2009；YB/T5063；GB/T1805；JB/T11222-2011；

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济南恒瑞金试验机有限公司；弹簧检测仪器制造商；山东省力值硬度计量委员

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