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 Posted: Sun 20:54, 12 Dec 2010 Post subject: tory burch sale CMM tilt correction _4239 |
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CMM tilt correction
cosa baseline measurements only in the workpiece measured in the plane of the machine coordinates of the relevant points. Computer calculations can be completed immediately axis tilt correction. Figure 3 shows the workpiece reference axis for determining several commonly used methods. Graph: the side perpendicular to the base level, the measured points, B coordinates,[link widoczny dla zalogowanych], that the origin, AB as the base axis. Establish the work piece coordinate system x0Y. Figure 36, said: datum measured with the two intersecting vertical side of A, B, C, mouth coordinates of points, find the ship and by CI) intersection of two lines O, the O is the origin, measure the hole centers O, too OO, the straight line for the reference axis x,. Establish coordinates xY. 3 store 3c Salmon said: In the face perpendicular to the side of the baseline, the measured A, B coordinates of two points. To determine the lateral position. Measured hole center O, calculated by the original point (hole center) to the lateral side of the machine coordinates of distance and angle between the x-axis 0, the x axis and side parallel to the mouth to determine the reference axis xl, build: I two coordinates system x, o, Y Figure 3, said: obtained by measuring, B,[link widoczny dla zalogowanych], c, mouth center coordinates of each hole. D Center for the origin of hole, hole centers two cents as a reference axis connection, the establishment of coordinate system xOYt, respectively, the coordinates along the x, Yt direction of translation from the elbow to xY, this time from the hole center coordinates to the origin of holes, and then the coordinates xY rotation angle, a new coordinate system xOY. Third, the cylindrical axis of the tilt correction is used as the axis of cylindrical workpiece axis workpiece coordinate system, the machining error of + the axis of cylindrical workpiece surfaces and the installation of measurement is often not vertical. The axis of cylindrical workpiece cylindrical surface can be the center of the connection of two cross-section determined. Shown in Figure 4, the cylinder cross-section I of the circle. Roughly uniform distribution of the measure, its coordinates are (,, Austin), (, y2, 2), (, such as】), then (a) 4 -(+)=(// ff-~) (a 1,2 * 3) (6) where: o, o I one by one section of the center coordinates; - ⑦. Jun, 1994 to the measurement technology. № 3,,, good or bad. L5 workpiece cross-section radius; r - probe radius. Section I, which can be obtained by the center Ol (,-o, Z, 1). In section i,[link widoczny dla zalogowanych], the coordinates measured on the circumference is (\. V2o,). X Ol connected by a cylindrical workpiece to determine the axis of z, the equation for the blue b = b =! II (7) 20 A; ClOy2o-1oz.2-I general, the axis z, and measuring machine Z is not parallel to coordinate auxiliary slightly tilted angle obtained by the following formula 22 - ZI. oS ∞ = (cricket - t1o) - (a). corrected coordinate system. 』cowpea mlz = Xsin { p - Zcos ~ p, a, f7 where: X, Y,[link widoczny dla zalogowanych], z - coordinates of the machine;, l.., z - coordinates of the workpiece. When the most precise measurement, the use of elliptical cylindrical workpiece axis method of correction . If the auxiliary fixed z, measuring the workpiece cross-section intersecting a line of five points, the coordinates (a i ~ 5), by the general quadratic equation a +2 +2 + +2 +, 10 (10 ) rectifiable obtaining the center coordinates one by one ∞ ..., one by one \, Enter the five points of the surface of the workpiece coordinate a length chu, (I ~ 5), from Equation (10), Village of cylinder + q} +2 +2 hit. +2 +, A 0 (f = l ~ 5) (12) Solutions (12) and (11). Coefficient can be obtained, 6, c, d,[link widoczny dla zalogowanych], e and the cross section of the center coordinates. Similarly. Another set of a section of the center coordinates can be obtained, m through the center of the two sections can be obtained cylinder axis. Using coordinate measuring machine tilt correction in the measurement process can easily establish the workpiece coordinate system, find the feature points of the measured elements, characteristics, characteristics of surface coordinates, to obtain the required measurement results b ( [1] E23 (9) References MICROPAK. 21. Systemstandprogram. MITUTOY0. Flowers Guoliang editor. Precision measurement technology. China's total Zha Press】 990 720 with 391 teeth and tooth dividing table any combination of plane angle measure Lihong Lu Deji dare T7, (Chengdu, 610200 China photovoltaic technology and pay) Abstract This article describes the tooth dividing table 391, and 1440, respectively, tooth dividing table 720 into a differential combination of multi-tooth dividing table again and micrometer collimator used in conjunction with the horizontal plane can detect small-angle and arbitrary plane angle. The dividing table 391 teeth were tooth dividing table with 1440,720,360 combination of coaxial shaft to form a combined differential and more
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