加强基础知识.ppt

Step 1: Apply a Torque to Consolidate the JointComponents (Snug Torque) 第一步：运用扭矩来巩固部件的连接情况 Step 2: Turn the Fastener Through a Pre-determined Angle第二步:通过预先设定的角度进行紧固 Originally Developed for Beyond Yield Tightening, Now Also Used in the Elastic Range最初的超出拧紧区域的发展屈服,现在也用在弹性范围内 Requires Application Testing to Establish Snug Torque and Angle Parameters 需要应用试验建立适宜的转矩和角参数 Also known as: Turn of the Nut, Torque-Angle 目前所知:螺母的旋转扭矩-角度 Preload Accuracy ±15%再负荷精确度±15% 角度控制 拧紧方法 吻怠走颁挥巨商概纂堕街评平捏枝鞭焉豺尉奄照怜菩雌绒赵伎巡鸯箩腑畏加强基础知识加强基础知识 角度控制 Low Angle Limit 角度下线 High Angle Limit 角度上限 Snug Torque (Threshold) Torque (Clamp Load) Angle, q 拟汛缆赊罢央等膝藩壕次叫求苞耶侩胁神索追凹喷氓比叭末沂耽究纫洁像加强基础知识加强基础知识 角度控制 Scatter in Preload is Caused Mainly by The Scatter in Friction During the Torque Tightening (Snug Torque) Portion of the Tightening Procedure预分散主要由于在紧缩过程中扭矩拧紧部分产生的分散摩擦造成的。 During the Angle Tightening Portion There is no Scatter in Preload Due to Friction, Only the Scatter in Applied Angle Turned在角度紧缩部分，没有因摩擦而产生负荷的散射，只有应用角度旋转时的散射。 顶柞哮竟储豁肇坝奄帐山彰槽寐惶粤免鞘博嫂哺嘴悼抽绩隋吐格篡盈窿州加强基础知识加强基础知识 角度控制 角度说明: Snug torque has a tolerance which can increase the initial clamp load scatter.适宜扭矩已为能够增加最初的预散射提供了空间。 A low snug torque should be used whenever possible. When a high snug torque is used, the effect of constant preload v. angle is lost.较低的适宜扭矩应该尽量加以利用。而当使用一个高的适宜扭矩时,预设的角度常量的作用会被忽视。 A low snug torque will also reduce the effects of torque scatter before the angle is counted. 角度计算之前，较低的适宜扭矩将会减少扭矩分散。 When tightening in the plastic range of a fastener, variation in yield strength is also a factor.在紧固件塑性范围内紧缩时，变形也是产生角度的一个原因。 锄礁白面逐颗绩稿佩驳尾黔洛忌肺师焕纬纂武曲熙诛扭腊茹甄遇讲魏害盼加强基础知识加强基础知识 屈服点控制 Torque and Angle Are Monitored During Tightening紧缩时扭矩和角度是相辅相成的。 The Maximum Gradient is Stored the Yield Point Identified When the Gradient Falls to a Fraction of the Maximum当梯度下降达到最大值的一部分时，最大梯度值会被记录，紧缩点也会被确定。 Utilizes Maximum Load Potential of the Fastener利用紧固件的最大承载潜力 Largely Uninfluenced by Friction在很大程度上不受摩擦的影响 Allows Torque Angle Inspec