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Spindle boring machine with a rectangular vertical heart test

5 - on behalf of the people above formula in each case to reflect the value of the work surface as the main axis of the vertical error. Third,[link widoczny dla zalogowanych], uncertainty analysis (a) estimates of uncertainty was to eliminate systematic errors because it is the method used to measure the vertical axis of the table, the rectangular device measuring error does not require consideration. Uncertainty main sources: 1. Indicators of the indication error and the reading component of measurement uncertainty caused by dividing the value of O. 5 Ⅱ m instructions Indication error ± 30ptm range Tolerance as 0.5ptm, readings error 0.1p. m, both the synthesis of 0.51, urn in the half width of the component O51, um within the range for the uniform probability distribution, probability distribution and set a higher relative uncertainty of 10%, then the / /, ( L1) = 0.51 = 0.29 / ~ m (? 1) = (1 / 2) x (10/100) = 502. Measurement repeatability rectangular device with a 400mm × 250ram placed on the table coordinate boring machine, the instructions with 0.5tLm clamping in the spindle count, measuring spindle movement on the table vertical table for 10 repeated measurements obtained experimental standard deviation S = 0.3l \) ... 10193. measurement location error component of measurement uncertainty caused by positioning error is due to the flatness table bearing the impact of the rectangular device tilted at an angle. When the right angle 180 feet after the detection of rotation, the table flatness measurement error caused are not interchangeable offset. therefore required consider positioning error on measurement. because rectangular foot side and short edge ratio are 16 Therefore positioning error is use location bearing surface flatness 1.6 times. According to the provisions of the precision coordinate boring machine, table flatness of the table within the 1000mm length 10b ~ m. rectangular device side length of 250ram,[link widoczny dla zalogowanych], use the location for the flatness of 2.5 \Half width of the component in the 2.5 \(1.6 × 2.5) / 43 = 2.31 \Spindle taper hole radial component of the uncertainty of measurement in accordance with the provisions of the spindle near the end, that is retracted boring axis,[link widoczny dla zalogowanych], in order to 2.0tLm; out at the spindle f (f is 250mm a 400mm), 4. 0tLm. In the measurement of the vertical axis of the table degrees, to measure the full length of the spindle,[link widoczny dla zalogowanych], so they chose the f value at the maximum allowable. Consider the readings were only in the side, the radius of maximum 2.0tLm, and the half width of interval, whichever is triangular distribution, then: (L) = (2.06) = 0.82 / ~ m to estimate the relatively certainty of 50%, so (L) = (1 / 2) × (50/100) = 2 (-) calculated the combined standard uncertainty / /, (L) = u (L1 )+//,( L2) + u (? 3) + u (L4) = 6.150 / ~ mu (L) = 2.48 / ~ m (L) = 2.484 / [(0.294/50) + (0. 224 / 9) + (2.31/125) + (0.824 / 2)] ≈ l50 (15) = 2.13 (c) Calculate the expanded uncertainty U99 = 0 (15) x Ⅱ (L) = 2 .13 × 2.48 = 5.28 / ~ m four test cases in the model T4163B vertical boring machine, and with the detection of different rectangular device working surface of the vertical axis. Results in Table 2. Table 2 rectangular device rectangular feet Indicators Indication spindle axis External angle value (pro) worktable vertical degree number (m) t2 (pro) 80o67-9 +22 +9658 o084-4.5 +18 +37573173 +3 + l5 +36.00578-10 + l3065 test results showed that: using this method to test vertical coordinate boring machine vertical axis on the table, the test results from the work of the selected rectangular device angle values. The method to meet the testing requirements, can be replaced with a rectangular device on the vertical boring party rules to carry out the detection of vertical axis. References [1] the representation of uncertainty of measurement and evaluation of Chinese National Military Standard C-JB3756-99 [2] Chou Kangsheng bed with a rectangular device detection Bei vertical moving parts. Factory measurement and testing,[link widoczny dla zalogowanych], 1996.4 silk salt Kui Q Q

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