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 Posted: Thu 0:39, 16 Dec 2010 Post subject: ed hardy clothing GB1958-80 in the keyway on the e |
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GB1958-80 in the keyway on the error detection scheme symmetric Discussion
One of equal length. India tlO time when fa = o, F-f B from the cross-sectional geometry of Phoenix known: a, =,-I-2me by △ o0 ~ Amec and 5jliaR \/ (D i) (where Ai is the keyway in the Ba surface measurement point of time was effective against yung difference.) Me == / TiC, = (i / 2) · *- i / l I [port (d one )]. '. F =, cut in + long '/ l A [, It) 3 (1) Under the general shape Sui, √ (d i) is very small, so equation (1) simplifies into;, =, cut in + L (2) (1), (2) is the value of error stag keyway symmetric formula. Two equations, the equation (2) calculation of the error than equation (1), slightly larger, so using equation (2) determine a symmetry level, degree of embedding, i Diao accuracy measurement technology degrees, higher product quality; and type (2) calculation is simple, so I think that using equation (2) universal music practical significance. In addition,, the value calculation can only take cross-section measurement, the two cross sections were measured on the keyway da 0, values (values are replaced), direct calculation of F, without the need to measure this is because long: 0 = (1 / 2 ) · (a + port). = (I / 2) · (a) (Note: here the 4 * in the border and that. High. Yu's is different.) Medical and type (2) can be written in the following form F = l4- Ten roar J. h/f2 (d-h) 3 + l mouth. A 4. J / 2 (0, ± 992. № 909] Fourth,[link widoczny dla zalogowanych], the conclusion i. GB1958 - 80 Keyway Symmetry detection program (3-1), the \; but get the error measured in both directions the maximum error as part determine the symmetry is not station management, which determine the actual error is smaller than the error of 2. Keyway Symmetry correct error should be in the cross-section keyway symmetry to the symmetry errors and errors of length, ie,[link widoczny dla zalogowanych],:, =, cut in + long. you can only cross section measurements at both ends of the keyway will be converted into the above equation the following form:, = J. +4: 』 · / [2 (-h) 3 + J4l a 4J2. use \of reference [1] arguments put forward different views, is open to discussion with colleagues,[link widoczny dla zalogowanych], flatness measurement error of the indirect method, by measuring the actual number of points on the surface of the relative height difference (relative tilt angle), in accordance with the literature [2], square enamel will be imputed to the uniform Code of the plane, and then calculate the minimum conditions that meet or approximate assessment of surface, rinse the measuring point to assess the distance from the plane flatness error. Widespread use of a variety of reference \In the high accuracy measurement, this place can guarantee the accuracy of it? References [1] In fact this were negative. I think it is positive for the following reasons: As shown, the measuring point P to the assessment of distance from the plane Ps, the vertical coordinates of poor PR. Ps, PR plane and the plane consisting of the Intersection of RS. A = PR-PS that \For the latter, on the straightness error evaluation of a number of references have been detailed argument, even if the ignored \If the location of said measuring point, Y coordinates and elevation of the z coordinate units that are inconsistent, with point to plane distance is calculated,[link widoczny dla zalogowanych], not only increase the workload in vain, and have not allowed error. Such as [1] mentioned the example of values in Table l. Measuring point coordinate, y, to the lower left corner is the origin, right, up, 100 increments. This points to the Cheng calculated very small squares assessed distance from the plane,[link widoczny dla zalogowanych], as shown in Table 2. It can be seen that the calculated least square method of flatness error, = 103.66. Values in Table 2, rotating platform to meet the minimum conditions for triangular norms, by reference [1], given the flatness error, = 98.72. It gives the results of many references are very different, the reason is ignored, y coordinates and z coordinates of unit inconsistencies. Location of the point is in millimeters, the height is in units of microns. jc, y, z coordinates using the same units, table l, y coordinates should cover the lower left corner is the origin, right, up, increasing 100000. Calculated that the measuring point to the least square method of distance from the plane, as shown in Table 3. , = 105,, ... = 100, and references given in the results. If you replace the points with z coordinates of poor
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