扭力扳手也叫扭矩扳手，力矩就是力和距離的乘積，在緊固螺絲螺栓螺母等螺紋緊固件時需要控制施加的力矩大小，以保證螺紋緊固且不于因力矩過大破壞螺紋，所以用扭矩扳手來操作。設定好一個需要的扭矩值上限，當施加的扭矩達到設定值時，扳手會發出“卡塔”聲響或者扳手連接處折彎一點角度，這就代表已經緊固不要再加力了。扭力扳手可以分為：預置式扭力扳手、數顯扭力扳手、表盤扭力扳手、打滑式扭力扳手。預置式扭力扳手、表盤式扭力扳手、打滑式扭力扳手一般統稱為機械式扭力扳手。
Torque wrench is also called torque wrench. Torque is the product of force and distance. When tightening threaded fasteners such as screws, bolts and nuts, it is necessary to control the applied torque to ensure that the threads are tightened and will not damage the threads due to excessive torque, so it is operated with torque wrench. First, set an upper limit of the required torque value. When the applied torque reaches the set value, the wrench will make a "click" sound or bend a little angle at the wrench connection, which means that it has been tightened and no more force is added. Torque wrench can be divided into preset torque wrench, digital display torque wrench, dial torque wrench and slip torque wrench. Preset torque wrench, dial torque wrench and slip torque wrench are generally referred to as mechanical torque wrench.
雖然數顯扭力扳手的性能優于表盤式扭力扳手,但是在上往往太高,如對于作業要求不是非常嚴格的行業,建議選擇低的機械式扭力扳手。反之在一些對螺栓聯結有較高要求的行業,尤其是在一些汽車、橋梁、航天航空、機械等行業中,因為數顯扭力扳手的存在加大了各種產品的可靠性和緊密性。
Although the performance of digital display torque wrench is better than dial torque wrench, the price is often too high. For example, for industries with not very strict operation requirements, it is recommended to choose mechanical torque wrench with low price. On the contrary, in some industries with high requirements for bolt connection, especially in some automobile, bridge, aerospace, machinery and other industries, the existence of digital torque wrench increases the reliability and tightness of various products.
液壓扳手對于大規格的螺栓的安裝與拆卸都是一種較為重要的工具，在選購液壓扳手時，螺栓的規格、螺栓的強度等級是液壓扭矩扳手選型的關鍵參數，液壓扭矩力扳手有驅動式液壓扭矩扳手和中空式液壓扳手兩種，驅動式液壓扭矩扳手配合標準套筒使用，為通用型液壓扳手，適用范圍廣。中空液壓扳手厚度較薄，特別適用于空間比較狹小的地方。適用于電力(核電、風電、水電、火電)、船舶、冶金、交通、水泥、建筑、航空等領域。今天小編就主要給大家介紹一下液壓扭力扳手的選擇及注意事項。
Hydraulic wrench is an important tool for the installation and disassembly of large bolts. When purchasing hydraulic wrench, bolt specification and bolt strength grade are the key parameters for the selection of hydraulic torque wrench. Hydraulic torque wrench includes driven hydraulic torque wrench and hollow hydraulic wrench. Driven hydraulic torque wrench is used with standard socket, It is a universal hydraulic wrench with wide application range. The hollow hydraulic wrench is thin in thickness and is especially suitable for places with narrow space. It is applicable to electric power (nuclear power, wind power, hydropower, thermal power), shipbuilding, metallurgy, transportation, cement, construction, aviation and other fields. Today, Xiaobian mainly introduces the selection and precautions of hydraulic torque wrench.
根據螺栓規格
According to bolt specification
一般有幾種規格，例如M36、M42、M48，如果不說螺母多大，是按公制螺栓螺母副配套筒的對邊，M36在的螺母六角對邊是55，M42是65，M48是75。如螺栓規格跨度太大，而且扭矩跨度較大，那預緊這些螺栓就必然要選用兩種型號扳手。
Generally, there are several specifications, such as M36, M42 and M48. If the nut is not large, it is the opposite side of the metric bolt and nut auxiliary cylinder. The opposite side of the nut hexagon of M36 is 55, M42 is 65 and M48 is 75. If the bolt specification span is too large and the torque span is large, two types of wrenches must be selected for pre tightening these bolts.
根據螺栓扭矩
According to bolt torque
提醒：螺栓的規格、螺栓的強度等級是液壓扭矩扳手選型的關鍵參數,螺栓不同，扭矩不同，同樣的螺栓強度等級不同扭矩不同，同樣螺栓強度等級，不同工況的扭矩也不同，用于軋機設備和化工設備上螺栓扭矩是不一樣的，一般的設計圖 紙都會給出扭矩大小，如不給，會給出相應的標準號，如重型機器設備是采用國標—JB/T5000.10-2007,如8.8級M42的螺栓的扭矩為2744Nm；M36螺栓的扭矩為1764Nm；M48螺栓的扭矩為3920Nm；以上三種螺栓可以選一種型號的扳手。
Reminder: bolt specification and bolt strength grade are the key parameters for the selection of hydraulic torque wrench. Different bolts have different torques, the same bolt strength grade has different torques, the same bolt strength grade has different torques under different working conditions, and the bolt torque used for rolling mill equipment and chemical equipment is different. The torque will be given in general design drawings, If not, the corresponding standard number will be given. For example, the national standard JB / t5000.10-2007 is adopted for heavy machinery and equipment, for example, the torque of grade 8.8 M42 bolt is 2744nm; The torque of M36 bolt is 1764nm; The torque of M48 bolt is 3920nm; One type of wrench can be selected for the above three bolts.
根據螺栓、螺母空間位置
According to the spatial position of bolts and nuts
如果沒有空間限制，哪個型號的扳手都可以使用；驅動式液壓扳手為經濟；如螺栓擰好后露出的螺紋較長或者螺栓上面有空間有限，好使用中空式液壓扳手；如螺母間距離狹窄，可選用中空式液壓扳手。
If there is no space limit, any type of wrench can be used; Driven hydraulic wrench is economical; If the thread exposed after the bolt is screwed is long or there is limited space on the bolt, it is good to use a hollow hydraulic wrench; If the distance between nuts is narrow, hollow hydraulic wrench can be selected.
其它注意事項
Other precautions
1）一種型號的液壓扭力扳手，只能幾種相近的螺栓，一般配1-10個套筒；
1) A type of hydraulic torque wrench can only solve several similar bolts, generally equipped with 1-10 sockets;
2）有條件的廠家是一個電動泵配兩個扳手頭使用，對角使用，可以提率，扭矩更準確；
2) The qualified manufacturer is an electric pump equipped with two wrench heads, which can be used diagonally to improve efficiency and more accurate torque;
3）液壓扳手必須專人使用，專人保管，經常保養，如換油，清洗等；
3) The hydraulic wrench must be used and kept by a specially assigned person and maintained regularly, such as oil change, cleaning, etc;
4）螺栓扭矩標準應以國標為準，國標是符合國情的。
4) The bolt torque standard shall be subject to the national standard, which is in line with China's national conditions.
1、在開始的人們開始要先做的就是要確定這個拆松的動作，還是就是人們還要利用的就是用來鎖緊螺母然后在通過該按下動作或旋出鎖固螺釘。
1. At the beginning, what people have to do first is to determine whether the loosening action is used to lock the nut, and then press the action or screw out the locking screw.
2、在進行一些的取出驅動方軸在進行對他們的換向。
2. Take out the drive square shaft and reverse them.
3、在后來人們可以在它的上面裝上一些有關的驅動方軸定位器，拉下反作用力臂鎖固裝置，按適合方位裝入反作用力臂、確定拆松、鎖緊工作時方軸方向。
3. Later, people can install some relevant driving square shaft positioners on it, pull down the locking device of the reaction force arm, install the reaction force arm according to the appropriate orientation, and determine the direction of the square shaft during disassembly and locking.
總結：液壓扳手采用標準四方形驅動軸，配合不同規格套筒，適合多種場合應用,大限度的采用高強度輕金屬,一體成型動力頭，提高強度及壽命；較大的扭矩/重量比,雙作用，高速,轉角大，效率高, 360°×360°旋轉軟管接頭使在狹小的空間內使用方便,不會出現機構卡死, 扭矩重復精度高達±3%,松開時不需其它工具,存貯箱保護扳手頭避免損壞，浸水和污濁,運動部件少，經久耐用，維護方便。隨著8.8級以上高強度螺栓的普遍使用，為使用聯接和預緊達到設計要求，使得液壓扳手成為必需。
Summary: the hydraulic wrench adopts standard square drive shaft, matched with sleeves of different specifications, which is suitable for various applications. It adopts high-strength light metal to a large extent and forms a power head in one, so as to comprehensively improve the strength and service life; Large torque / weight ratio, double acting, high speed, large angle, high efficiency, 360 ° × 360 ° rotating hose joint makes it easy to use in a narrow space without mechanism jamming. The torque repetition accuracy is as high as ± 3%. No other tools are required when loosening. The storage box protects the wrench head from damage, immersion and dirt. There are few moving parts, durable and convenient maintenance. With the widespread use of high-strength bolts above grade 8.8, in order to meet the design requirements for connection and pre tightening, hydraulic wrench has become necessary.
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