CN103419165B - A kind of high accuracy torque spanner and verification, installation and detection method - Google Patents

A kind of high accuracy torque spanner and verification, installation and detection method Download PDF

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CN103419165B
CN103419165B CN201310317706.6A CN201310317706A CN103419165B CN 103419165 B CN103419165 B CN 103419165B CN 201310317706 A CN201310317706 A CN 201310317706A CN 103419165 B CN103419165 B CN 103419165B
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connecting plate
spanner
torque
high accuracy
plate
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CN103419165A (en
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孟峰
张智敏
张跃
蔡常青
张伟
王肖磊
张殿龙
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National Institute of Metrology
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Abstract

本发明公开了一种高精度扭矩扳子及其校验、安装和检测方法,包括传感部件、力臂以及显示部件,所述传感部件与所述力臂相连接,所述显示部件通过信号线与所述传感部件连接,完成显示输出;所述传感部件包括受力板、弹性体、一组连接板、方榫和一组应变片;所述一组连接板包括前连接板和后连接板;所述受力板和弹性体固定设置在所述前连接板和后连接板之间,形成一个固定体;所述方榫设置在所述传感部件的下端面上;一组所述应变片设置在传感部件上;所述力臂一端固定在所述后连接板的另一侧,施加作用力;所述显示部件与所述的一组应变片电连接。本发明的测量扭矩值不受受力位置影响,为扭矩扳子检定仪检定校准提供科学可靠的校准手段。

The invention discloses a high-precision torque wrench and its verification, installation and detection methods, comprising a sensing part, a force arm and a display part, the sensing part is connected with the force arm, and the display part passes a signal The wire is connected with the sensing part to complete the display output; the sensing part includes a force plate, an elastic body, a set of connecting plates, a square tenon and a set of strain gauges; the set of connecting plates includes a front connecting plate and a The rear connection plate; the force plate and the elastic body are fixedly arranged between the front connection plate and the rear connection plate to form a fixed body; the square tenon is arranged on the lower end surface of the sensing component; a set The strain gauge is arranged on the sensing part; one end of the moment arm is fixed on the other side of the rear connecting plate to apply force; the display part is electrically connected with the set of strain gauges. The measured torque value of the invention is not affected by the position of the force, and provides a scientific and reliable calibration means for the calibration of the torque wrench calibrator.

Description

一种高精度扭矩扳子及其校验、安装和检测方法A high-precision torque wrench and its calibration, installation and detection methods

技术领域technical field

本发明涉及一种高精度高准确度扭矩扳子及其使用方法,可用于螺栓拧紧、螺栓拧紧检测、扭矩测试以及扭矩扳子检定仪检测校准。The invention relates to a high-precision and high-accuracy torque wrench and a use method thereof, which can be used for bolt tightening, bolt tightening detection, torque testing, and torque wrench calibration instrument detection and calibration.

背景技术Background technique

扭矩扳子又称扭矩扳手,一种主要用于螺栓拧紧的工具,在国标中命名为扭矩扳手,在检定规程系列中命名为扭矩扳子,对扭矩扳子进行检定的仪器叫做扭矩扳子检定仪,本申请文件中沿用规程中习惯命名法,即:扭矩扳子及扭矩扳子检定仪。目前国内外对于螺栓拧紧扭矩越来越重视,高精度的扭矩扳子的应用需求越来越迫切,国外厂家生产高精度扭矩扳子可达到1%、作为标准用的扭矩扳子更是达到了0.1%精度。国内扭矩扳子难以达到1%精度,并且在改变施力位置时误差非常大,即改变受力点位置时数值将有较大变化。只能在扳手标记的刻线处施力才能保证1%精度,如稍微调整位置将无法达到1%精度。Torque wrench, also known as torque wrench, is a tool mainly used for tightening bolts. It is named torque wrench in the national standard and torque wrench in the series of verification regulations. The instrument for verifying torque wrench is called torque wrench calibrator. This application The customary nomenclature in the regulations is followed in the document, namely: torque wrench and torque wrench calibrator. At present, more and more attention is paid to the tightening torque of bolts at home and abroad, and the application demand for high-precision torque wrenches is becoming more and more urgent. The high-precision torque wrench produced by foreign manufacturers can reach 1%, and the standard torque wrench can reach 0.1% accuracy. . It is difficult for domestic torque wrenches to achieve 1% accuracy, and the error is very large when changing the force application position, that is, the value will change greatly when changing the position of the force point. The 1% accuracy can only be guaranteed by applying force at the engraved line marked by the wrench. If the position is slightly adjusted, the 1% accuracy will not be achieved.

此外,最新修订并将要颁布执行国家扭矩扳子检定仪检定规程,要求标准扭矩扳子的精度等级达到0.3%与0.1%两级,并且在改变受力位置进行检定时仍能达到上述两级精度等级,而目前国内还没有达到该规程要求的标准扭矩扳子。In addition, the latest revision will promulgate and implement the national torque wrench verification instrument verification regulations, which require the standard torque wrench to have an accuracy level of 0.3% and 0.1%, and the above two levels of accuracy can still be achieved when the force-bearing position is changed for verification. At present, there is no standard torque wrench that meets the requirements of this regulation in China.

发明内容Contents of the invention

本发明利用应变测量技术,结合受力结构设计,自主研制了一种高精度扭矩扳子,其特点是结构科学合理、精度等级高,可达到0.1%精度,比现有技术实现的1%精度提高一个数量级,并且在不同施力位置下示值误差与重复性均优于0.1%。本发明系列的扭矩扳子量程范围可以从0.1Nm-5000Nm,能够满足最新修订并将要颁布执行的国家扭矩扳子检定仪检定规程。此外,本发明的扭矩扳子轻便灵巧、便于携带,可广泛用于各类螺栓拧紧控制及螺栓装配质量检测、作为标准设备使用还可以用于扭矩扳子检定装置检测。The present invention uses the strain measurement technology and combines the design of the force structure to independently develop a high-precision torque wrench, which is characterized by a scientific and reasonable structure and a high level of precision, which can reach 0.1% precision, which is higher than the 1% precision achieved by the existing technology. An order of magnitude, and the indication error and repeatability are better than 0.1% under different force application positions. The measuring range of the torque wrench series of the present invention can be from 0.1Nm to 5000Nm, which can meet the latest revision and will be promulgated and implemented by the National Torque Wrench Calibration Instrument Verification Regulations. In addition, the torque wrench of the present invention is light, smart, and easy to carry, and can be widely used in various types of bolt tightening control and bolt assembly quality inspection, as standard equipment, and can also be used in the inspection of torque wrench verification devices.

一种高精度扭矩扳子,包括传感部件、力臂以及显示部件,所述传感部件与所述力臂相连接,所述显示部件通过信号线与所述传感部件连接,完成显示输出;A high-precision torque wrench, including a sensing part, a moment arm and a display part, the sensing part is connected to the moment arm, and the display part is connected to the sensing part through a signal line to complete the display output;

所述传感部件包括受力板4、弹性体7、一组连接板、方榫5和一组应变片6;The sensing components include a force plate 4, an elastic body 7, a set of connecting plates, a square tenon 5 and a set of strain gauges 6;

所述一组连接板包括前连接板3和后连接板8;所述受力板4和弹性体7固定设置在所述前连接板3和后连接板8之间,形成一个固定体;所述方榫5设置在所述传感部件的下端面上;所述输出方榫5位于所述受力板4的底面;所述应变片6位于所述弹性体7的两个侧壁上。所述受力板4的底端设置方形孔,所述方榫5通过磁铁嵌入该方形孔内,所述方形孔的轴线中心线与所述方榫5的轴线中心线重合。The group of connecting plates includes a front connecting plate 3 and a rear connecting plate 8; the force plate 4 and the elastic body 7 are fixedly arranged between the front connecting plate 3 and the rear connecting plate 8 to form a fixed body; The square tenon 5 is arranged on the lower end surface of the sensing component; the output square tenon 5 is located on the bottom surface of the force plate 4 ; the strain gauges 6 are located on the two side walls of the elastic body 7 . The bottom end of the force plate 4 is provided with a square hole, and the square tenon 5 is inserted into the square hole through a magnet, and the axis centerline of the square hole coincides with the axis centerline of the square tenon 5 .

所述后连接板8与力臂连接;可以在后连接板8上留有螺纹孔与力臂通过螺栓连接,也可以在后连接板8上加工出其他合适的方式使8与力臂进行连接。The rear connecting plate 8 is connected with the arm; threaded holes can be left on the rear connecting plate 8 to connect with the arm through bolts, or other suitable methods can be processed on the rear connecting plate 8 to connect the 8 with the arm .

一组所述应变片6设置在传感部件上;一组所述应变片6设置在所述弹性体7的两侧壁表面上,且每一侧固定上下两片应变片6,两侧的四片应变片分别为ε1、ε2、ε3、ε4;One set of strain gauges 6 is arranged on the sensing part; one set of strain gauges 6 is arranged on the two side wall surfaces of the elastic body 7, and each side is fixed with two strain gauges 6 up and down. The four strain gauges are ε1, ε2, ε3, ε4 respectively;

所述四片应变片组成全电桥,所述应变片6的固定位置使各应变片6沿竖直的方向中心线与方榫5的轴线中心线平行并且各中心线到所述前连接板3的距离相等。The four strain gauges form a full bridge, and the fixed position of the strain gauges 6 is such that the centerline of each strain gauge 6 is parallel to the centerline of the axis of the square tenon 5 along the vertical direction and each centerline is connected to the front connecting plate 3 are equally spaced.

所述力臂一端固定在所述后连接板8的另一侧,施加作用力;所述显示部件与所述的一组应变片6电连接。显示施加在螺栓上的扭矩值,应变片组成全桥后通过转接头与外部显示仪表连接。One end of the force arm is fixed on the other side of the rear connecting plate 8 to apply force; the display component is electrically connected to the set of strain gauges 6 . Display the torque value applied to the bolts, and connect the strain gauges to the external display instrument through the adapter after forming a full bridge.

具体的方案中,所述弹性体7固定在所述受力板4的上方;In a specific solution, the elastic body 7 is fixed above the force plate 4;

所述受力板4和弹性体7与所述前连接板3和后连接板8之间为一体式结构或者通过连接部件连接;所述连接部件包括一组固定螺栓;用于将所述受力板4,弹性体7固定在所述前连接板3和后连接板8中间;受力板4只是一端固定,与弹性体不接触,将扭矩通过连接板3传导到弹性体7上。The force plate 4 and the elastic body 7 are integrated with the front connecting plate 3 and the rear connecting plate 8 or are connected through connecting parts; the connecting parts include a set of fixing bolts; The force plate 4 and the elastic body 7 are fixed between the front connecting plate 3 and the rear connecting plate 8; the force plate 4 is only fixed at one end and does not contact the elastic body, and transmits the torque to the elastic body 7 through the connecting plate 3.

具体实施中,所述连接部件为第一安装螺栓1、第二安装螺栓2、第三安装螺栓9;所述第一安装螺栓1将所述前连接板3与所述弹性体7固定连接;所述第二安装螺栓2将所述前连接板3与所述受力板4固定连接;所述第三安装螺栓9将所述后连接板8与所述弹性体7固定连接。In specific implementation, the connecting parts are the first mounting bolt 1, the second mounting bolt 2, and the third mounting bolt 9; the first mounting bolt 1 fixedly connects the front connecting plate 3 and the elastic body 7; The second mounting bolt 2 fixedly connects the front connecting plate 3 with the stress plate 4 ; the third mounting bolt 9 fixedly connects the rear connecting plate 8 with the elastic body 7 .

可以包括以下几种情况:Can include the following situations:

所述前连接板3与所述弹性体7为一体式结构,所述前连接板3与所述受力板4之间通过第二安装螺栓2固定连接,所述后连接板8与所述弹性体7之间通过第三安装螺栓9固定连接;The front connecting plate 3 and the elastic body 7 are of an integral structure, the front connecting plate 3 and the stressed plate 4 are fixedly connected by the second mounting bolt 2, and the rear connecting plate 8 and the The elastic bodies 7 are fixedly connected by a third mounting bolt 9;

或者,所述前连接板3与所述受力板4为一体式结构,所述前连接板3与所述弹性体7之间通过第一安装螺栓1固定连接,所述后连接板8与所述弹性体7之间通过第三安装螺栓9固定连接;Alternatively, the front connecting plate 3 and the force receiving plate 4 are of an integral structure, the front connecting plate 3 and the elastic body 7 are fixedly connected by the first mounting bolt 1, and the rear connecting plate 8 and the elastic body 7 are fixedly connected. The elastic bodies 7 are fixedly connected by a third mounting bolt 9;

或者,所述弹性体7与所述后连接板8为一体式结构,所述前连接板3与所述弹性体7之间通过第一安装螺栓1固定连接,所述前连接板3与所述受力板4之间通过第二安装螺栓2固定连接;Alternatively, the elastic body 7 and the rear connecting plate 8 are of an integrated structure, the front connecting plate 3 and the elastic body 7 are fixedly connected by first mounting bolts 1, and the front connecting plate 3 and the elastic body 7 are fixedly connected. The force plates 4 are fixedly connected by the second mounting bolts 2;

或者,所述弹性体7与所述后连接板8为一体式结构,所述前连接板3与所述受力板4为一体式结构,所述前连接板3与所述受力板4之间通过第二安装螺栓2固定连接。Alternatively, the elastic body 7 and the rear connecting plate 8 are of an integral structure, the front connecting plate 3 and the force receiving plate 4 are of an integral structure, the front connecting plate 3 and the force receiving plate 4 They are fixedly connected by the second mounting bolt 2.

在将所述前连接板3与所述受力板4和/或所述弹性体7和/或所述弹性体7与所述后连接板8组成一体式结构时,以能实现最高加工精度为最优选方式。When the front connecting plate 3 and the force plate 4 and/or the elastic body 7 and/or the elastic body 7 and the rear connecting plate 8 are formed into an integrated structure, the highest machining accuracy can be achieved is the most preferred way.

如果所述前连接板3与所述受力板4或弹性体7之间不是一体式结构,所述弹性体7与所述后连接板8之间也不是一体式结构,都通过连接部件连接:If the front connecting plate 3 and the force plate 4 or the elastic body 7 are not in an integrated structure, the elastic body 7 and the rear connecting plate 8 are not in an integrated structure, and they are all connected by connecting parts :

所述弹性体横截面为圆形或者矩形等。The cross section of the elastic body is circular or rectangular.

在贴应变片位置前后都可为圆形或矩形等。无特定作用,不同截面设计时根据力学公式不同其同一扭矩时产生的应变计算算法不同。It can be circular or rectangular before and after the position of the strain gauge. There is no specific role, and the strain calculation algorithms for the same torque are different according to the different mechanical formulas when designing different sections.

所述弹性体7的长度宽度的尺寸可调,当长度宽度变化时相应的截面面积随之变化,用于改变高精度扭矩扳子的量程范围。The length and width of the elastic body 7 are adjustable, and when the length and width change, the corresponding cross-sectional area changes accordingly, which is used to change the measuring range of the high-precision torque wrench.

包括include

所述传感部件还包括外壳10,所述外壳罩敷在所述前连接板3、后连接板8与弹性体7外。The sensing component also includes a casing 10 , and the casing covers the front connecting plate 3 , the rear connecting plate 8 and the elastic body 7 .

本发明的第二个发明点在于利用高精度扭矩扳子进行扭矩扳子检定仪校验方法The second invention point of the present invention lies in the calibration method of the torque wrench calibrator by using a high-precision torque wrench

所述扭矩扳子检定仪校验方法是将所述高精度扭矩扳子与扭矩扳子检定仪连接,用于检定校准所述的扭矩扳子检定仪;The calibration method of the torque wrench calibrator is to connect the high-precision torque wrench with the torque wrench calibrator for calibrating the torque wrench calibrator;

将所述扭矩扳子的方榫5与所述扭矩扳子检定仪的检测端连接;开启扭矩扳子检定仪,操作扭矩扳子检定仪当扭矩扳子检定仪上反作用档臂机构接触到高精度扭矩扳手力臂后,就将扭矩施加在扳手上,进而比较两者数据,对扭矩扳子检定仪的测量值进行校验。Connect the square tenon 5 of the torque wrench to the detection end of the torque wrench tester; turn on the torque wrench tester, operate the torque wrench tester when the reaction gear arm mechanism on the torque wrench tester touches the high-precision torque wrench arm After that, the torque is applied to the wrench, and then the two data are compared to verify the measured value of the torque wrench calibrator.

本发明在应用所述扭矩扳子中,本发明第三个发明点在于将扭矩扳子进行螺栓安装方法:将所述扭矩扳子的方榫5通过固定套筒将螺栓根据精度要求进行旋紧固定连接。到达所要安装扭矩后停止。In the application of the torque wrench in the present invention, the third invention point of the present invention lies in the bolt installation method of the torque wrench: the square tenon 5 of the torque wrench is tightened and fixedly connected with the bolt according to the precision requirements through the fixing sleeve. Stop when the desired installation torque is reached.

另外,本发明扭矩扳子对于安装螺栓除了可以安装外,更重要在于螺栓安装质量测量方法,根据设定和工况要求,将所述扭矩扳子的方榫5通过固定套筒对安装螺栓的扭矩值进行检测。In addition, in addition to being able to install the mounting bolts, the torque wrench of the present invention is more important in the method of measuring the quality of the bolt installation. According to the setting and working conditions, the square tenon 5 of the torque wrench is passed through the fixing sleeve to the torque value of the mounting bolts. to test.

本发明的扳手可以根据不同量程,设计不同长度的力臂,比如力臂长度可以从200mm~1500mm,扳手整体质量从1kg~10kg。The wrench of the present invention can be designed with different length arms according to different measuring ranges. For example, the length of the moment arm can be from 200mm to 1500mm, and the overall mass of the wrench can be from 1kg to 10kg.

本发明的高精度扭矩扳子,具有精度等级高:示值相对误差及重复性均优于0.1%。最关键的是当改变施力点位置时扳手测量的始终是方榫中心位置扭矩值,不同于其他数显扭矩扳子当改变受力位置时将会带来较大测量误差的缺陷。本发明的高精度扭矩扳子量程范围宽:可以从0.1Nm-5000Nm。灵巧轻便,易于携带。The high-precision torque wrench of the present invention has a high level of precision: the relative error and repeatability of the indication value are both better than 0.1%. The most important thing is that when the position of the force application point is changed, the wrench always measures the torque value at the center of the square tenon, which is different from other digital display torque wrenches that will cause large measurement errors when changing the position of the force. The high-precision torque wrench of the present invention has a wide measuring range: from 0.1Nm to 5000Nm. Smart and lightweight, easy to carry.

此外,改变本发明的扳手弹性体的尺寸就可以改变扳手量程范围,该结构可以实现在0.1Nm-5000Nm,优选1Nm~2000Nm范围内达到0.1%精度,测量不确定度0.1%(k=2),改变受力点位置时示值误差与不确定度均优于0.1%(k=2),因此可以作为扭矩扳子检定仪检定校准的标准扭矩扳子。In addition, changing the size of the wrench elastic body of the present invention can change the range of the wrench. This structure can achieve 0.1% accuracy in the range of 0.1Nm-5000Nm, preferably 1Nm-2000Nm, and the measurement uncertainty is 0.1% (k=2) , when the position of the force point is changed, the indication error and uncertainty are both better than 0.1% (k=2), so it can be used as a standard torque wrench for the calibration of the torque wrench calibrator.

总而言之,本发明是一台具有高精度的扭矩扳子,符合新标准要求的测量扭矩值不受受力位置影响,为扭矩扳子检定仪检定校准提供科学可靠的校准手段。还可以为螺栓拧紧工况检测提供科学有效的高精度扭矩扳子,并且,本发明的高精度扭矩扳子实用方便,为外出检测校准扭矩扳子检定仪、各类螺栓拧紧扭矩测试提供了方便实用的标准器。In a word, the present invention is a torque wrench with high precision, the measured torque value meeting the requirements of the new standard is not affected by the position of the force, and provides a scientific and reliable calibration method for the calibration of the torque wrench calibrator. It can also provide a scientific and effective high-precision torque wrench for the detection of bolt tightening conditions, and the high-precision torque wrench of the present invention is practical and convenient, and provides a convenient and practical standard for going out to detect and calibrate the torque wrench calibrator and various bolt tightening torque tests device.

附图说明Description of drawings

图1为本发明的高精度扭矩扳子的结构示意图。Fig. 1 is a schematic structural view of the high-precision torque wrench of the present invention.

图2为图1的俯视图。FIG. 2 is a top view of FIG. 1 .

图3为本发明高精度扭矩扳子的传感部件的结构示意图。图4为图3的俯视图。Fig. 3 is a structural schematic diagram of the sensing part of the high-precision torque wrench of the present invention. FIG. 4 is a top view of FIG. 3 .

附图标记说明:Explanation of reference signs:

a-传感部件、b-力臂、1-第一安装螺栓、2-第二安装螺栓、3-前连接板、4-受力板、5-输出方榫、6-应变片、7-弹性体、8-后连接板、9-第三安装螺栓、10-外壳。a-sensing component, b-moment arm, 1-first mounting bolt, 2-second mounting bolt, 3-front connecting plate, 4-force plate, 5-output square tenon, 6-strain gauge, 7- Elastomer, 8-rear connecting plate, 9-third mounting bolt, 10-housing.

具体实施方式detailed description

下面结合实施例,进一步说明本发明。Below in conjunction with embodiment, further illustrate the present invention.

实施例1Example 1

如图3~4所示的高精度扭矩扳子,其包括传感部件、力臂以及显示仪表,所述传感部件与所述力臂相连接,所述显示仪表通过信号线与所述传感部件连接,其特征在于:A high-precision torque wrench as shown in Figures 3 to 4, which includes a sensing component, a force arm and a display instrument, the sensing component is connected to the force arm, and the display instrument is connected to the sensor through a signal line Component connection, characterized by:

所述传感部件包括前连接板3以及后连接板8、受力板4、弹性体7方榫5以及应变片6;The sensing components include a front connecting plate 3 and a rear connecting plate 8, a force plate 4, an elastic body 7, a square tenon 5, and a strain gauge 6;

所述受力板4以及所述弹性体7在所述前连接板3的同侧,所述弹性体7位于所述受力板4的上方,所述弹性体7与所述受力板4的水平方向上各个平面相互平行;所述后连接板8位于所述弹性体7的另一侧;The stressed plate 4 and the elastic body 7 are on the same side of the front connecting plate 3, the elastic body 7 is located above the stressed plate 4, and the elastic body 7 and the stressed plate 4 The planes in the horizontal direction are parallel to each other; the rear connecting plate 8 is located on the other side of the elastic body 7;

所述前连接板3与所述受力板4和/或所述弹性体7和/或所述弹性体7与所述后连接板8之间为一体式结构或者通过连接部件连接;The front connecting plate 3 and the force plate 4 and/or the elastic body 7 and/or the elastic body 7 and the rear connecting plate 8 are of an integrated structure or connected by connecting parts;

所述后连接板8与力臂连接;可以在后连接板8上留有螺纹孔与力臂通过螺栓连接,也可以在后连接板8上加工出其他合适的方式使8与力臂进行连接。The rear connecting plate 8 is connected with the arm; threaded holes can be left on the rear connecting plate 8 to connect with the arm through bolts, or other suitable methods can be processed on the rear connecting plate 8 to connect the 8 with the arm .

所述输出方榫5位于所述受力板4的底部,所述应变片6位于所述弹性体7的两个侧壁。The output square tenon 5 is located at the bottom of the force plate 4 , and the strain gauges 6 are located at the two side walls of the elastic body 7 .

所述前连接板3与所述弹性体7为一体式结构或所述前连接板3与所述受力板4为一体式结构和/或所述弹性体7与所述后连接板8为一体式结构。所述受力板4的底端设置方形孔,所述输出方榫5通过磁铁嵌入该方形孔内,所述方形孔的中心线与所述输出方榫5的中心线重合。The front connecting plate 3 and the elastic body 7 are of an integrated structure or the front connecting plate 3 and the stressed plate 4 are of an integrated structure and/or the elastic body 7 and the rear connecting plate 8 are One-piece structure. The bottom end of the force plate 4 is provided with a square hole, and the output square tenon 5 is inserted into the square hole through a magnet, and the center line of the square hole coincides with the center line of the output square tenon 5 .

弹性体7的两个侧壁的每一侧粘贴两片应变片6,两侧共粘贴四片应变片6,分别为ε1、ε2、ε3、ε4,四片应变片组成全桥,所述应变片6的粘贴位置要保证各应变片6沿竖直的方向中心线与输出方榫5的中心线平行并且各中心线到所述前连接板3的距离相等。Two strain gauges 6 are pasted on each side of the two side walls of the elastic body 7, and four strain gauges 6 are pasted on both sides, respectively ε1, ε2, ε3, ε4, and the four strain gauges form a full bridge. The pasting position of the sheet 6 should ensure that the centerline of each strain gauge 6 along the vertical direction is parallel to the centerline of the output square tenon 5 and the distance from each centerline to the front connecting plate 3 is equal.

所述连接部件为第一安装螺栓1、第二安装螺栓2、第三安装螺栓9;The connecting parts are the first mounting bolt 1, the second mounting bolt 2, and the third mounting bolt 9;

所述第一安装螺栓1将所述前连接板3与所述弹性体7固定连接;The first mounting bolt 1 fixedly connects the front connecting plate 3 to the elastic body 7;

所述第二安装螺栓2将所述前连接板3与所述受力板4固定连接;The second mounting bolt 2 fixedly connects the front connecting plate 3 with the force plate 4;

所述第三安装螺栓9将所述后连接板8与所述弹性体7固定连接。The third mounting bolt 9 fixedly connects the rear connecting plate 8 with the elastic body 7 .

所述前连接板3通过两个第一安装螺栓1在弹性体7一端的两侧与其固定;The front connecting plate 3 is fixed on both sides of one end of the elastic body 7 by two first mounting bolts 1;

所述前连接板3通过两个第二安装螺栓2在受力板4一端的两侧与其固定;The front connecting plate 3 is fixed on both sides of one end of the force plate 4 by two second mounting bolts 2;

所述后连接板8通过两个第三安装螺栓9在弹性体7另一端的两侧与其固定。The rear connecting plate 8 is fixed to the elastic body 7 on both sides of the other end by two third mounting bolts 9 .

所述传感部件还包括外壳10,其为由顶面和两侧面组成的结构,所述两个侧面上留有螺纹孔以分别与前连接板3和后连接板8连接或者与弹性体7连接。The sensing component also includes a housing 10, which is a structure consisting of a top surface and two sides, and threaded holes are left on the two sides to connect with the front connecting plate 3 and the rear connecting plate 8 or the elastic body 7 respectively. connect.

所述弹性体7贴有应变片6的部分,其横截面为矩形或圆形等。无特定作用,不同截面设计时根据力学公式不同其同一扭矩时产生的应变计算算法不同。The part of the elastic body 7 pasted with the strain gauge 6 has a rectangular or circular cross section. There is no specific role, and the strain calculation algorithms for the same torque are different according to the different mechanical formulas when designing different sections.

本发明的扳手可以根据不同量程,设计不同长度的力臂,比如可以从200mm~1500mm,扳手整体质量从1kg~10kg。The wrench of the present invention can be designed with different length arms according to different measuring ranges, for example, it can be from 200mm to 1500mm, and the overall mass of the wrench can be from 1kg to 10kg.

本发明的工作过程为:Working process of the present invention is:

第一:作为标准扭矩扳子对扭矩扳子检定仪进行校准检测时,将该高精度扭矩扳子当作普通扳手安装在扭矩扳子检定仪上,按照扭矩扳子检定仪检定规程中标准扭矩扳子检定法进行检定。First: When calibrating and testing the torque wrench calibrator as a standard torque wrench, install the high-precision torque wrench on the torque wrench calibrator as an ordinary wrench, and perform the calibration in accordance with the standard torque wrench calibrating method in the torque wrench calibrating instrument verification regulations .

第二:作为高精度扭矩扳子进行螺栓安装或对螺栓安装质量进行检测时,可将该扳手通过套筒与安装螺栓进行连接,对螺栓进行旋紧,当达到目标扭矩值时停止。Second: When installing bolts as a high-precision torque wrench or inspecting the quality of bolt installation, the wrench can be connected with the installation bolts through the sleeve, the bolts can be tightened, and stop when the target torque value is reached.

上述技术方案只是本发明的一种实施方式,对于本领域内的技术人员而言,在本发明公开了应用方法和原理的基础上,很容易做出各种类型的改进或变形,而不仅限于本发明上述具体实施方式所描述的方法,因此前面描述的方式只是优选的,而并不具有限制性的意义。The above-mentioned technical solution is only an embodiment of the present invention. For those skilled in the art, on the basis of the application methods and principles disclosed in the present invention, it is easy to make various types of improvements or deformations, and is not limited to The methods described in the above specific embodiments of the present invention, therefore, the above-described methods are only preferred and not limiting.

Claims (9)

1. a high accuracy torque spanner, it is characterised in that: include sensing element, the arm of force and display unit, institute Stating sensing element to be connected with the described arm of force, described display unit is connected with described sensing element by holding wire, Complete display output;
Described sensing element includes stressed plate (4), elastomer (7), one group of connecting plate, side's tenon (5) and Group foil gauge (6);
Described one group of connecting plate includes front connecting plate (3) and rear connecting plate (8);Described stressed plate (4) and Elastomer (7) is fixedly installed between described front connecting plate (3) and rear connecting plate (8), forms one admittedly Determine body;Described side's tenon (5) is arranged on the lower surface of described sensing element;Foil gauge (6) described in one group It is arranged on sensing element;
The opposite side of the fixing connecting plate (8) in the rear in described arm of force one end, applies active force;Described display Parts are connected by joint and signal transmssion line with described one group of foil gauge (6);
Described elastomer (7) is fixed on the top of described stressed plate (4);
Stressed plate (4) is that one end is fixed, and does not contacts with elastomer, by moment of torsion by front connecting plate (3) It is transmitted on elastomer (7);And
Described in one group, foil gauge (6) is arranged on the surface, two side of described elastomer (7), and every side Fixing upper and lower two panels foil gauge (6), four foil gauges of both sides are respectively ε 1, ε 2, ε 3, ε 4;
Described four foil gauges form full electric bridge, and the fixed position of described foil gauge (6) makes each foil gauge (6) Connect before described along vertical direction centrage with the parallel and each centrage of axis centre line of side's tenon (5) The distance of plate (3) is equal.
A kind of high accuracy torque spanner the most according to claim 1, it is characterised in that:
Described stressed plate (4) and elastomer (7) and described front connecting plate (3) and rear connecting plate (8) it Between for integral type structure or connected by connection member;
Described side's tenon (5) is positioned at the bottom surface of described stressed plate (4);Described foil gauge (6) is positioned at described bullet On two sidewalls of gonosome (7).
A kind of high accuracy torque spanner the most according to claim 1 and 2, it is characterised in that:
The bottom of described stressed plate (4) arranges square opening, and it is square that described side's tenon (5) embeds this by Magnet In hole, the axis centre line of described square opening overlaps with the axis centre line of described side's tenon (5).
A kind of high accuracy torque spanner the most according to claim 2, it is characterised in that:
The cross section of described elastomer (7) is circular or rectangle.
5. a kind of high accuracy torque spanner according to claim 1, described in any one in 2,4, it is characterised in that:
The length of described elastomer (7), width dimensions is adjustable, for changing the range model of high accuracy torque spanner Enclose.
A kind of high accuracy torque spanner the most according to claim 2, it is characterised in that:
Described connection member includes that is fixed a bolt;For by described stressed plate (4), elastomer (7) is solid It is scheduled in the middle of described front connecting plate (3) and rear connecting plate (8);
Described sensing element also includes shell (10), described jacket apply described front connecting plate (3), after connect Fishplate bar (8) is with elastomer (7) outward.
7. one kind utilizes the high accuracy torque spanner as described in any one in claim 1-6 to carry out torque spanner Calibrating instrument method of calibration, it is characterised in that:
Described detecting device for determining torque of spanner method of calibration is by described high accuracy torque spanner and detecting device for determining torque of spanner Connect, for the detecting device for determining torque of spanner described in assay calibration;
The square tenon (5) of described torque spanner is connected with the test side of described detecting device for determining torque of spanner;Open and turn round Square spanner calibrating instrument, operation detecting device for determining torque of spanner is when retroaction shelves arm mechanism contact on detecting device for determining torque of spanner After the high accuracy torque spanner arm of force, just place a torque on spanner, and then compare both data, to torsion The measured value of square spanner calibrating instrument verifies.
8. one kind utilizes the high accuracy torque spanner as described in any one in claim 1-6 to carry out bolt installation Method, it is characterised in that:
Carry out screwing admittedly according to required precision by bolt by fixing sleeve by the square tenon (5) of described torque spanner Fixed connection, stops after arriving moment of torsion to be installed.
9. one kind utilizes the high accuracy torque spanner as described in any one in claim 1-6 to carry out high accuracy spiral shell Bolt installation quality measuring method, it is characterised in that:
According to setting and working condition requirement, by the square tenon (5) of described torque spanner by fixing sleeve to installing spiral shell The torque value of bolt detects.
CN201310317706.6A 2013-07-26 2013-07-26 A kind of high accuracy torque spanner and verification, installation and detection method Expired - Fee Related CN103419165B (en)

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CN107677415B (en) * 2017-10-16 2023-05-19 河南省计量科学研究院 A torque wrench testing device
CN107764469B (en) * 2017-10-16 2023-11-14 河南鑫亮建设工程有限公司 Torque spanner calibrating device and bolt simulator thereof
CN113681497B (en) * 2021-08-23 2022-10-04 苏州金锐启智能装备科技有限公司 Method for automatically searching force application line of digital display torque wrench

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CN202540196U (en) * 2012-04-06 2012-11-21 中国航天空气动力技术研究院 Direct measurement type digital display torque spanner
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