ROCKET LAB PSC MOTORIZED Lightband MKII, Руководство по эксплуатации

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Copyright PSC 2000781K MkII MLB Operating Procedure Page 18 of 68
Step Procedure
Date & Initials
Tech. QA
6.1.10
Torque all fasteners on the Lower Ring. Minimum allowable torque is 70 in
∙lb.
PSC typically torques 100 to 115 in
∙lb. Higher torque is allowable for high line-
loading. See note 2.
6.1.11
Attach the Upper Ring to its adjoining structure by inserting fasteners and
washers through the counterbores. Tighten fasteners until hand tight. Do not
contact the Lightband with the wrench. See Figure 6-4.
6.1.12
Torque all fasteners on the Upper Ring. Minimum allowable torque is 70 in
∙lb.
PSC typically torques 100 to 115 in
∙lb. Higher torque is allowable for high line-
loading. See note 2.
6.1.13
Verify the circularity of both the Lower and Upper Rings complies with PSC
document
2000785 MkII MLB User Manual . Measurement frequency shall be
sufficient to ensure minimum and maximum diameters are determined. See
note 3 and Figure 6-5.
Record results below.
Parameter Lower Ring Upper Ring
Stated bolt circle diameter, nom [in]
Circularity tolerance, ±tol [in]
Minimum measured value, min [in]
Maximum measured value, max [in]
Difference, max-min [in]
All requirements met?
2) Customer shall always perform a thorough bolted-joint analysis to ensure sufficient margin on material
strength, joint slipping and joint gapping.
3) If measuring a feature other than the bolt circle diameter, e.g. the distance across diametrically opposing
flanges, the difference between the minimum and maximum values shall correspond to the total circularity
tolerance. For example, a circularity tolerance of ±X implies the flange difference, max-min,
shall be ≤2X.
Figure 6-5: Circularity example