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 Wysłany: Sob 4:41, 11 Gru 2010 Temat postu: ugg prezzo Disc spring pre-load on the coordinate |
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Disc spring pre-load positioning of the coordinate measuring machine error of indication of
450ram from the abscissa to the origin of coordinates at every 50ram for the period of time from right to left orientation indication and lasers. Show the deviation curve. ■ light foot positioning error correction value 05ol0015020025030035o40O45oX axis (mm) Figure 3o5ol0015o2oo25030035040o450x axis (mm) Figure 4 Figure 5 foot positioning error light cabinet light cream they enjoy the time when they enjoy the positive foot position error in Figure 3 Figure 4 is calculated based on x-axis coordinate the origin to positive 450ram, X-axis measurement baseline (metal grating) every 50mm Table 1 for the cumulative period of positioning error correction value, the vertical axis position error correction value measurement basis of data calculated in Table 1. x-axis range of each interval shown in Figure 3 paragraphs rhyme benchmarks sections calculated from Figure 3, Figure 4 Measurement of the cumulative baseline correction of the value of positioning error in paragraph (mm) position error correction value (btm) (/ xm) 0 ~ 5024. 00-22.30 = 1.700-50ram0 +1.70 = 1.7050-10022.30-21.20 = 1.100-100mm1.10 +1.70 = 2.80100-15021.20-2O. O0 = 1.200-150ram1.20 +2.80 = 4. O0150-2O020.00-19.50 = 0.500-200mm0.50 +4.00 = 4.50200-25019.50-17.30 = 2.200-250ram2.20 +4.50 = 6.70250- 30017.30-13.70 = 3.600-300mm3.60 +6.70 = 10.30300-35013.70-9.50 = 4.200-350ram4.2O +10.30 = 14.50350-4O09. 50-6.25 = 3.250-400mm3.25 +14.50 = 17.754O0-4506.25-0 = 6.250-450ram6.25 +17.75 = 24.00 Figure 5 shows the X-axis coordinate origin to the axis measuring forward base 450mm (metal grating) from left to right at intervals of 50mm as a positioning indication when the deviation with the laser show curve. From Figure 3, Figure 5 graphs can be seen, measuring a large base of measurement error return (24m or 18.7, o.m), is not the normal state, and Figure 4, Figure 5, baseline measurement of the vertical axis position error correction value is very different,[link widoczny dla zalogowanych], this state is difficult to measure the machine positioning error correction, the indication error is relatively large, almost x, Y, z axis between the various dimensions of the same nominal value of the axial length measurements show error of the difference between 0.01-0.02mm. So to solve the above problem, in addition to other aspects of coordinate measuring machines to ensure proper installation and commissioning (such as connectors to ensure a rigid system,[link widoczny dla zalogowanych], the system lag, etc.), but also to the root of the disc spring pre-load strictly design and manufacturing to ensure the accuracy of their own, and the reasonableness of the assembly, such as its cylindrical bore coaxial with the requirements of the parallelism of the two face requirements, material properties and the hardness after heat treatment, the assembly process it is necessary to to fully ensure its own good contact with the relevant parts, but also must be able to play its role properly, not allow for easy installation and curing of the adhesive used to bond with the relevant parts of its role in causing poor or no role to play. Air is best to use a wide temperature grease (commonly known as lanolin) to the relevant pieces of the adhesive, making it easy to install, without destroying its own proper role. Figure 6 is in the debugging process to replace the excellent and reasonably disc spring pre-load the assembly, the coordinate measuring machine x-axis position error of the correction curve, measuring the baseline (the metal grating) shows the value of the whole trip 450ram value with the laser show deviation of only 9m, to ensure its return in the m or less error, as amended, the indication error of length measurement has reached a point of order about the test requirements. Practice shows that the same size in the x, Y,[link widoczny dla zalogowanych], z-axis shows the difference between the value of not more than 4,[link widoczny dla zalogowanych], o. m. Grating position error correction value can be seen in Figure 6, on rigorous disc spring pre-load the appropriate design, the right to organize its process, and the rational use of the assembly,[link widoczny dla zalogowanych], said the value of the coordinate measuring machine accuracy are essential impact. References [1] Wang agriculture, Wang Zhengqiang and so on. Coordinate measuring machine calibration specifications. China Metrology Publishing House, 2000 DR [2] Guoxiong and so on. CMM. Tianjin University Press, 1999 [3] Shen Hong and so on. Mechanical Engineering Handbook. Machinery Industry Press, 1982 7
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