【文章內(nèi)容簡(jiǎn)介】 and Angle Parameters 需要應(yīng)用試驗(yàn)建立適宜的轉(zhuǎn)矩和角參數(shù) Also known as: Turn of the Nut, TorqueAngle 目前所知 :螺母的旋轉(zhuǎn)扭矩 角度 Preload Accuracy 177。 15%再負(fù)荷精確度 177。 15% 角度控制 擰緊方法 角度控制 kdPT ?? ? ?? 360pF p q???Low Angle Limit 角度下線(xiàn) High Angle Limit 角度上限 Snug Torque (Threshold) Torque (Clamp Load) Angle, q 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預(yù)分散主要由于在緊縮過(guò)程中扭矩?cái)Q緊部分產(chǎn)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在角度緊縮部分，沒(méi)有因摩擦而產(chǎn)生負(fù)荷的散射，只有應(yīng)用角度旋轉(zhuǎn)時(shí)的散射。 kdTFp ?? ? ?? 360 pp FF q???角度控制 角度說(shuō)明 : Snug torque has a tolerance which can increase the initial clamp load 。 A low snug torque should be used whenever possible. When a high snug torque is used, the effect of constant preload v. angle is 。而當(dāng)使用一個(gè)高的適宜扭矩時(shí) ,預(yù)設(shè)的角度常量的作用會(huì)被忽視。 A low snug torque will also reduce the effects of torque scatter before the angle is counted. 角度計(jì)算之前，較低的適宜扭矩將會(huì)減少扭矩分散。 When tightening in the plastic range of a fastener, variation in yield strength is also a ，變形也是產(chǎn)生角度的一個(gè)原因。 屈服點(diǎn)控制 Torque and Angle Are Monitored During Tightening緊縮時(shí)扭矩和角度是相輔相成的。 The Maximum Gradient is Stored amp。 the Yield Point Identified When the Gradient Falls to a Fraction of the Maximum當(dāng)梯度下降達(dá)到最大值的一部分時(shí)，最大梯度值會(huì)被記錄，緊縮點(diǎn)也會(huì)被確定 。 Utilizes Maximum Load Potential of the Fastener利用緊固件的最大承載潛力 Largely Uninfluenced by Friction在很大程度上不受摩擦的影響 Allows Torque Angle Inspection of Every Tightening允許對(duì)所有緊縮政策實(shí)施扭矩轉(zhuǎn)角的監(jiān)控 Bolts Can Be Reused 螺栓可以重復(fù)利用 Also known as: Torque to Yield扭矩屈服點(diǎn) Preload Accuracy 177。 8% 擰緊方法 屈服點(diǎn)控制 50% of Peak Gradient 50%的峰值梯度 Torque Gradient 扭矩梯度 Bolt Yield Point 螺栓屈服點(diǎn) Torque Torque (Clamp Load)夾負(fù)荷 Angle, q 屈服點(diǎn)控制 Reduced Variation in Preload After Tightening:緊縮之后減少預(yù)負(fù)荷中的變形 Preload Scatter is More Dependent on Strength Variation Than Friction Variation 比起摩擦， 預(yù)分散更依賴(lài)于強(qiáng)度變化 Bolt Strength is More Controllable Than Friction 螺栓強(qiáng)度比起摩擦力可控性更強(qiáng)。 BB oo ll tt SS tt rr ee nn gg tt hh SS cc aa tt tt ee rr (( %% )) 螺螺 栓栓 強(qiáng)強(qiáng) 度度 FF rr ii cc tt ii oo nn SS cc aa tt tt ee rr (( %% )) PP rr ee ll oo aa dd SS cc aa tt tt ee rr (( %% )) ?? 44 ?? 22 00 ?? 77 .. 33 ?? 88 ?? 22 00 ?? 11 00 .. 11 ?? 44 ?? 11 00 ?? 55 .. 11 ?? 88 ?? 11 00 ?? 88 .. 66 PRELOAD, N,預(yù)負(fù)荷 N Thread線(xiàn)程 Grade Size Range M4 x Minimum 4,400 6,200 7,300 Maximum 5,600 7,600 8,800 6 M5 x Minimum 7,200 10,000 12,200 9 11 Maximum 9,200 12,400 14,600 12 15 M6 x Minimum 10,200 14,200 16,100 11 14 18 Maximum 13,000 17,600 20,500 15 20 24 M8 x Minimum 18,600 26,200 31,400 25 37 44 Maximum 23,800 32,200 37,800 36 51 60 M10 x Minimum 29,800 41,600 50,000 52 73 88 Maximum 38,000 51,200 60,000 71 99 119 M12 x Minimum 43,400 60,700 72,900 92 128 156 Maximum 54,400 74,900 87,700 127 173 207 M14 x Minimum 59,400 83,300 100,000 144 205 244 Maximum 75,600 102,000 120,000 200 280 335 M16 x Minimum 82,500 115,000 138,000 228 322 383 Maximum 105,000 141,000 166,000 310 450 520 M18 x Minimum 99,200 139,000 167,000 305 430 510 Maximum 127,000 171,000 201,000 420 595 710 Grade M6 x Minimum 10,200 14,200 16,100 11 14 18 Maximum 13,000 17,600 20,500 15 20 24 夾緊力和理想扭矩 EXPECTED TORQUE, Nm預(yù)期的扭矩 ,海里 Clamp Load Scatter夾負(fù)荷分散 精密力矩扳手 M10 氣動(dòng)沖擊扳手 M14 氣動(dòng)定扭矩扳手 M12 最小夾緊力 電動(dòng)扳手 屈服點(diǎn)控制 M8 177。 8% 177。 15% 177。 25% 177。 30 40% 工具和螺栓選擇 屈服點(diǎn)控制 Joint May Not Be Critical Enough to Warrant its Cost 聯(lián)合不足以保證其成本 Should Not Use When:不應(yīng)使用的時(shí)機(jī)可概括為以下方面： Bolt Yield Strength Joint Compressive Strength螺栓屈服強(qiáng)度大于聯(lián)合抗壓強(qiáng)度時(shí) Bolt Yields Somewhere Other Than Threads螺栓產(chǎn)量某個(gè)主題 Head Shears螺栓頭掉了 Nut Strips螺母無(wú)螺痕 Applications Where Frequent Disassembly is Required應(yīng)用于頻繁解體所必需的場(chǎng)所 Joints With Unpredictable Stiffness Qualities連接質(zhì)量等的不可預(yù)知 If Yield is the Most Accurate, Why Not Always Use it? 如果產(chǎn)量是最準(zhǔn)確的 , 為什么不常用呢 ? 擰緊錯(cuò)誤 擰緊錯(cuò)誤 FOUR MAJOR ERRORS DURING BOLT