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Measurement precision worm gear errors of dynamic long-period


Are breaking. Small town eccentric ring by changing the spring between the relative position of the elimination. Head relative to the low-frequency coaxial worm wheel,[link widoczny dla zalogowanych], worm gear can be rotated,[link widoczny dla zalogowanych], with the dial indicator measuring low-frequency head flange diameter to determine the adjusted eccentricity. Wei Yong flea telescope 78 meters high the first 5-axis 3 jaw chuck by _ the second is connected with the measured worm, adjusting eccentric disc can be adjusted within fixed in three melon, with a dial gauge calibration of cylindrical radial runout Sheng so that in less than 3m,[link widoczny dla zalogowanych], and a fixed end screws,[link widoczny dla zalogowanych], so partial a b <o. 02ram. Tuner wheel drive linked to one 28 × × test device one by one Li a, where the magnetic sub-meter and the number of teeth on the rotating probe of a 2000; declination worm gear ratio i of a 720. Recorder calibration collapse mechanical scaler check, to prevent dirt, worm before the measurement rigorous cleaning. ? In dynamic measuring drive chain should pay attention to: 1. Maintain the single engagement, drive the speed of a O ~ 1 r / min, maximum speed 2000 rpm LNB / min; 2. Measurement repeatability is better, or to check the accuracy of equipment, transmission ratio is an integer, shaft SI action. Stiffness eccentricity and detection system installed; 3. To worm into a whole range of long-period measurement error; 4. Consistent with the use of state measuring state; 5 to more than the number of measurement points to ensure the accuracy of measurement and continuity. . . Fourth, 2.16m telescope declination worm measured results TOSIMOJS difference frequency excitation of a 25-type phase indexing than the measured low-frequency sensor defined Zhao JSP 『measurement error of ± 1.5, JSR high frequency sensor measurement error is ± (50\/ i +0.5 \NO3Q57 \0 ~ +15 worm. Bu Zhong Article C measurement, detection device installation are: low-frequency sensor fJj eccentric worm difference 0.025mm, high-frequency transducer with eccentric worm I1_IJ mistaken for 0. 01mm. Parameters than the total phase: the partial trend according to the measured sensitivity of human small selection switch, a 1,2, ... 6. According to the frequency deviation measured Chong filter selection switch, a 1 to 6, to reduce the noise, I 『strengthen the filter with 4 to 6 files. Recorder parameters: sensitivity 600mY, its grid of calibration of 0.5 arc seconds I take the paper to the declination worm gear speed 600mm/h5 were measured 4 times clockwise and counterclockwise on the worm gear of the I Austin averaged measured three times, the dynamics of power in order to avoid interference. In the late afternoon to ask or measurement. In-l, 2,3 the sensitivity of different currencies ¨, a 6-strong long-period filtering conditions for measurement error of divination: worm gear counterclockwise rotation for the 3.9 \.2 \S-2 in the sensitivity and weaken filter, a 5, 549 tooth worm gear that is damaged. Fifth, error analysis 1. Magnetic measurement error of indexing, including low-frequency head error of ± 1.5 \eccentric error: Worm in motion eccentric error e shown in Figure 4, the worm gear along the pitch circle of small evenly distributed, leading to long-period errors. set point angle of coordinate 0 on the rotation IfI heart.'s actual corner coordinates 0 , A point angle of take-chi is a O -. differential d (, 』9) a d0 - dO',。.。 P-(o-0) / / COSO (one point) / cosO. ・. point speed: I ∞ one point one by one priced at a dO ', a d, be d (xe) an d one by one c. s secret sub carp, a rcos Li a sin, the maximum error of about 0.8. \(2) stiffness detection devices: the experimental determination of the maximum error of about I. I \Glass screen, glass cone coordinate testing techniques'. ,,, / Jf (Color Picture Tube Company in Foshan, Foshan 528000) -7 \In this paper, glass screen, 27V and 19V the curvature parameter Tau glass cone eccentricity, tilt parameters of the test as an example. Introduction screen, the coordinates of the test cone coupling analysis and so on. Key words r t plastic whole Lan Zhu Shu catch fish type I, the test of good theory Cypriot curly Die grave 1. Positioning glass screen, glass cone in the coordinate positioning table hungry machine coordinate system. State as shown in Figure l, Figure 2. Figure I is a glass screen children where J ', J2. Built l: pieces of the workpiece coordinate system, the workpiece coordinate system is the foot

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