Two methods of measuring the main tooth assembly Measurement principle and measurement method Measurement method 1 Measurement principle and measurement process As shown, measurement method 1 is characterized by the simulation of the main tooth assembly bearing and bearing seat, measuring the outer gear bearing outer ring The value of the distance a2 from the lower end face to the upper end face of the bearing in the drive gear and the actual height h2 of the spacer, the actual required shim thickness Delta calculated by equation (1). The core measurement mechanism of measurement method 1 is a measurement The tray, as shown, consists mainly of the lower measuring plate 5, the upper measuring plate handle 7, the measuring plate spring 8 and the upper measuring plate 9. The specific measuring principle: the measuring disc spring has a preloading quantity. When the analog bearing is fitted with the simulated bearing, the displacement sensor has a reading when the displacement sensor is in contact with the top surface of the upper measuring plate handle; the actual bearing is mounted There is a reading on the displacement sensor of the bearing and the first value of the displacement is used as the calibration value of the displacement sensor of one shift. The second value of the displacement sensor is the reading obtained when the actual part is measured. With these two readings and the actual size of the simulated bearing and the simulated housing, the value of a2 can be calculated. Remove all the parts from the previous step, and insert the inner ring of the inner gear of the driving gear, the measuring plate, the bearing seat with the inner and outer bearing outer rings of the driving gear, and the outer ring of the driving gear outer bearing into the measuring base in the longitudinal direction from bottom to top. The displacement sensor is lowered to the upper surface of the upper measuring plate handle 7, and at this time the displacement sensor has a reading sa2. In addition, a spacer height measuring mechanism is provided to measure the spacer height h2, and the type main tooth assembly is obtained by the formula (1). The thickness of the gasket needs to be measured, and it is also necessary to measure the step height of the driving gear shaft with the attached machine. Measuring method 2 Measuring principle and measuring process w Measuring method 2 Measuring mandrel As shown, measuring method 2 is different from measuring method 1. It does not need to measure between the lower end face of the outer gear of the outer gear of the driving gear and the upper bearing section of the bearing in the driving gear. The value of the distance a2 and the actual height h2 of the spacer, but the actual condition of the analog main tooth assembly. The specific measurement principle: For the main gear assembly on the main shaft of the measuring spindle equipped with the driving gear outer bearing 6, the driving gear inner bearing 5 and the bearing seat, measure the stepped surface of the measuring core rod to the outer ring of the inner bearing of the tapered roller bearing. The distance A1 of the end face is measured on the measuring mandrel equipped with the inner ring of the driving gear inner bearing 5, the spacer sleeve 9, and the inner ring of the outer bearing 6 of the driving gear. The measuring surface of the mandrel is measured by the host to the upper end face of the inner ring of the outer gear of the driving gear. The distance A2, then the thickness of the gasket needed during assembly DelA type, F gasket thickness compensation value, F = F (Lw, P, Dp); Lw main thread nut nut precision; P main assembly after the main teeth Axial force generated by the nut pretightening torque distribution between the spacer and the bearing, the actual axial load bearing the main tooth bearing; Dp actually pad into the gasket and the pre-selected spacer thickness deviation between the size; SA2-SA1 displacement The difference between the two readings of the sensor (compression amount difference); measurement method 2 measurement process has a reading SA1. Comparison of the two measurement methods As shown in the figure, in order to obtain the actual required gasket thickness of the main type tooth assembly, the measurement method 1 uses two calibration parts to simulate the bearing inner ring and the bearing seat. One shift only needs to be calibrated once. The calibration value is the first reading of the displacement sensor. There is no need to read the positioning sensor readings during each measurement. The essence of the measurement method 1 is to measure the actual height of the a2 and spacers to obtain the actually required spacer thickness by the formula (1). Different from the measuring method 1, the measuring method 2 simulates the driving gear shaft by a calibrating part, and does not need to measure the actual value of the a2 and the spacer. The actual required gasket is obtained according to the formula (2) by calibrating the measurement once at a time. thickness. Two measuring methods Measuring parameters Comparative analysis Measuring methods 1 Measuring methods 2a2 Measurements need not to be measured Measuring spacer heights need to be measured Without measuring the calibration parts Bearing inner rings, bearing shafts Drive shafts and Measuring data are for a type of manufacturer The measurement data obtained by the tooth assembly through the two measurement methods is to make the measurement value more universally meaningful and to make the measurement inaccuracy factors fully exposed. The above measurement values ​​are measured every half hour in a shift. Compared with the measurement data of the two measurement methods, we can see that the measurement method 1 needs to measure more parameters than the measurement method 2, resulting in the introduction of more errors; measurement method 1 displacement sensor due to a long time without calibration, there is a zero point Drift, displacement sensor readings fluctuate more; measurement method 2 does not require complicated calculations, workers are easier to understand. mask ear loop elastic ear loop,non woven ear loop,Elastic ear band fabric,mask ear loop Zhejiang Changxing Vashinor Machinery Company , https://www.vashinor.com