Digital display torque wrench: How to achieve high-precision torque control?- Hangzhou Hao Gong Tools Co., Ltd.

In the field of industrial manufacturing, torque control is a key link to ensure product quality and safety. Whether it is the assembly of engines and transmissions in automobile manufacturing, the precise connection of parts in the aerospace field, or the tightening of steel structures in the construction industry, precise torque control is required. As an advanced torque measurement and control tool, digital display torque wrenches have been widely used in these fields due to their high precision, readability and convenient data recording functions.

Torque sensors are key components for digital display torque wrenches to achieve high-precision torque measurement. Common torque sensors use strain gauge technology or magnetic sensor technology. Strain gauge technology pastes strain gauges on elastic elements. When torque acts on the elastic element, the strain gauge generates strain, and its resistance value changes accordingly. The torque can be calculated by measuring the change in resistance value. Magnetic sensor technology uses the change in magnetic properties of magnetic materials under torque to measure torque. These sensors have good linearity and sensitivity, and can accurately convert the applied torque into electrical signals, providing accurate basic data for subsequent torque calculations.

As the control center of the digital display torque wrench, the microprocessor receives the electrical signal transmitted by the torque sensor and processes and calculates it. It uses advanced digital processing technology to quickly and accurately obtain the actual torque value. The microprocessor is also responsible for controlling the wrench's switch, mode switching, torque setting and other functions. Through programming and optimization of the microprocessor, a variety of torque measurement and control modes can be realized, such as real-time tracking mode, peak hold mode, etc., to meet the needs of different application scenarios.

Digital display torque wrenches are usually equipped with a liquid crystal display (LCD) to intuitively display the real-time torque value. Compared with traditional pointer torque wrenches, digital display has higher accuracy and readability. The digital display can be accurate to several decimal places, avoiding human reading errors, allowing operators to clearly understand the torque size and ensure the accuracy of torque control.

In order to meet the needs of different industries and application scenarios, digital display torque wrenches have the function of automatic conversion of multiple torque units, such as Newton meter (N·m), pound force foot (lbf·ft), inch pound force (in·lb), etc. The operator can select the appropriate torque unit according to the actual situation, which is convenient for torque setting and measurement. The realization of this function depends on the powerful computing power and software algorithm of the microprocessor to ensure accurate conversion between different units.

The preset alarm function is an important guarantee for the digital display torque wrench to achieve high-precision torque control. Before tightening the bolt or nut, the operator can preset the required torque value. During the tightening process, when the torque reaches the preset value, the wrench will send out an audible and visual alarm signal to remind the operator to stop the force in time. This function effectively prevents over-tightening or under-tightening, ensuring that the torque value of each fastener meets the precise requirements.

The peak hold function can record the maximum torque value during the tightening process. During the force application process, the displayed value increases with the increase of the tightening torque. After the force application is stopped, the displayed value is the maximum torque value before the force application is stopped. The operator can check the size of the torque value and store this torque value for subsequent analysis and evaluation of the tightening process. This is of great significance for quality control and traceability of the production process.

Digital display torque wrench can record torque measurement data and has data storage and transmission functions. It can store a certain amount of torque value data and upload the data to the computer through a bidirectional RS232 serial interface or other data transmission methods. Operators and inspectors can easily view, process, analyze, back up and print the recorded data to achieve effective control and quality assurance of the fastener preload and measurement process.

In the automobile manufacturing process, the tightening, disassembly and adjustment of components such as engines, transmissions, chassis and tires require precise control of torque. Digital display torque wrenches can ensure that the torque value of each fastener meets the precise requirements and improve the safety, stability and reliability of the car. For example, in engine assembly, the torque control of cylinder head bolts is crucial. Overtightening may cause bolt breakage, and over-loosening may cause poor cylinder sealing. Digital display torque wrenches can accurately control the torque of bolts to ensure the assembly quality of the engine.

Aerospace equipment has extremely high torque requirements for fasteners, and any slight torque deviation may affect the safety and reliability of the equipment. Digital display torque wrenches can ensure that the torque value of each fastener meets the precise requirements, and play an important role in aerospace manufacturing, repair and maintenance. For example, during the assembly process of aircraft engines, digital display torque wrenches are required to accurately control the torque of various bolts and nuts to ensure the normal operation of the engine.

In the tightening operation of building steel structures, digital display torque wrenches can ensure that the screws on the steel structure reach the expected tightening force and improve the overall stability and safety of the building. In bridge engineering, it is used for bolt tightening and torque control to ensure the stability and safety of bridge structures. For example, during the construction of large bridges, a large number of bolts are required for connection. Digital display torque wrenches can ensure that the torque of each bolt meets the design requirements to avoid problems with the bridge structure due to loose or overtightened bolts.