An impact wrench accumulated torque on-line measurement and calibration device
A technology of impact wrench and calibration device, applied in the direction of measurement device, force/torque/power measuring instrument calibration/test, torque measurement, etc., can solve the detection and calibration method that cannot accumulate torque with impact wrench. Practical significance, inability to carry out accurate torque control and other problems, to achieve the effect of meeting the technical indicators of torque control, light weight and small size
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Embodiment 1
[0042] see Figure 1-Figure 5 , the on-line measurement and calibration device for the accumulated torque of the impact wrench of the present invention, the upper end of the device body 10 is a driving square hole 11, the lower end is an output square tenon 13, and the middle part is an elastic body 14 with a cylindrical structure. There is a strain gauge torque sensor 18; a rotation angle sensor is provided at the bottom of the device body 10;
[0043] The device body 10 is fixed with a microelectronic detection and processing unit 20 and a lithium battery 50 through an elastic bracket 16; the microelectronic detection and processing unit 20 includes a microcontroller 21, a torque signal conditioning circuit 22, and a corner signal conditioning circuit 23, the display 25 and the multi-function button 27; the voltage signal output by the torque sensor 18 is conditioned and amplified by the torque signal conditioning circuit 22 and then connected to the A / D converter of the mic...
Embodiment 2
[0048] see figure 1 , figure 2 , Figure 6 The difference between the on-line measurement and calibration device for the accumulated torque of the impact wrench of this embodiment and that of Embodiment 1 is that further, the strain gauge torque sensor 18 is arranged on the elastic body 14 at an angle of 45 degrees to its central axis. The multi-piece strain gauges 15 evenly arranged in the angular direction form a measuring bridge, forming a strain gauge torque sensor integrated with the device body 10; the differential weak voltage signal output by the strain gauge torque sensor 18 enters the instrument amplifier AD627 of the torque signal conditioning circuit 22 The input end of the input terminal performs linear amplification, and the amplification factor is set by a high-precision resistor Rg, and the output voltage signal of 0-3VDC is connected to the channel 2 of the 12-bit A / D converter of the microcontroller 21 for A / D conversion and digital filtering.
Embodiment 3
[0050] see figure 1 , figure 2 ,image 3, Figure 7 and Figure 16 , the on-line measurement and calibration device for the accumulated torque of the impact wrench in this embodiment differs from Embodiment 1 and Embodiment 2 in that the angle sensor described has the characteristics of strong anti-interference ability, vibration resistance, high frequency response, etc. The high-precision magnetic ring encoder EMA52H30 based on tunneling reluctance technology has a cycle pulse number of 1024. The magnetic ring encoder includes two parts, a code disc 41 and a code reader 42. The code disc 41 is arranged on the installation shaft 12 at the lower part of the device body 10, and a wear-resistant self-lubricating member 43 is embedded between the code disc 41 and the installation shaft 12. , the code disc 41 is fixed with the rotating arm 40 and can rotate 360° along the central axis, the code reader 42 is arranged in cooperation with the code disc 41, the code reader 42 is fix...
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