PE37 中文版

1.1 Table 1 gives general tightening torques. For each fastener size three tightening torques are given which correspond to three material strength ranges (a, b or c).

1.1表1给出了一般紧固力矩。对于各种型号的紧固件，我们给出了a、b、c三种力矩， 这些紧固力矩均符合三种材料的强度范围。

The figures are for free running screws and are designed to produce a bolt loadapproaching 75% of its yield load.

表格中的参数适用于普通螺钉，并且适用于制造螺栓，表格中的参数为这些紧固件屈服强度的75%。

1.2 On existing projects, where tightening torques are not called up on drawing and no other guidance is given on the method of tightening, Appendix A should be used for selection of the most suitable tightening torque, i.e. All free running screws/nuts should be

tightened in accordance with Table 1, unless the drawing specifies otherwise.

在目前的项目中，当紧固力矩没有在图纸中体现出来并且紧固方法也没有具体要求的时候，就在附录A中选择合适的紧固力矩。也就是说所有的普通螺丝/螺母应该按照表1中的参数进行紧固，除非图纸中另有说明。

无需紧固力矩安装的特殊情况（除了对飞行安全关键的装配件-具体见1.4章节）

There are several cases where tightening torques should not be specified. In these

cases, a note must be added to drawing calling up the correct insertion procedure.

在以下的几种情况下，紧固力矩不需要被注明。在这些情况下，图纸中必须标注有明确的安装说明。

1.3.1screws are used - see para. 1.3.2)

拥有完全自锁装置的螺钉/螺母（除非是防腐蚀的螺钉-具体见1.3.2章节）

Tightening torques should not be specified where screws or nuts with an integral

locking device are used, e.g. self-locking nuts, deformed threads, self-locking heli-coils. Screws must be tightened until they are seen to be fully inserted. Care must be taken

not to apply excessive tightening torque, especially to the smaller fasteners. Once

tightened, back-off by 1/4 turn and then re-tighten.

当螺丝/螺母有完整自锁装置时，锁紧力矩无需被特别指出，例如：自锁螺母、变形螺纹、自锁heli-coils,螺丝必须完全拧入，但是必须注意不要用力过猛，特别是对于一些小的紧固件。一旦螺丝被拧紧，需往回松1/4圈，然后再次把螺丝拧紧。