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    JB/T 6655-2013耐热圆柱螺旋压缩弹簧永久变形测试Spring Compression Flexibility Test

    来源:www.jn-syj.com    发布于:2019/11/25 11:51:52    点击量:

    JB/T 6655-2013耐热圆柱螺旋压缩弹簧永久变形测试,将弹簧用试验负荷压缩三次,测量第二次和第三次压缩后自由高度的变化值。当试验负荷高于压拔负荷时,该负荷视为试验负荷。压并负荷的最大值应小于理论压并负荷的1.5倍。HRJ Spring Tester;JB/T 6655-2013适用于工作温度在200℃~550℃的圆截面材料冷卷或热卷耐热圆柱螺旋压缩弹簧。

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    JB/T 6655-2013耐热圆柱螺旋压缩弹簧技术条件;指定变形量下的弹簧负荷试验;指定变形量下的弹簧刚度试验;弹簧旋绕比C=D/d;旋绕比≥3~8,>8~15,>15~22;自由高度H0≤250mm,H0>250~500mm,H0>500mm;HRJ Spring Tester弹簧加温强压处理,测定弹簧永久变形;弹簧热松弛试验,计算弹簧负荷损失率;指定高度下施加负荷,测定弹簧变形量和弹簧刚度;

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