1、Lesson 11 Rivet Identification 铆钉的识别,（Part II）,广州民航职业技术学院机务系 顾铮,By : Zheng GU Aircraft and Engine Maintenance DepartmentCivil Aviation College of Guangzhou,Translate following questions in to English,铆钉的材料决定了铆钉的使用,The use of the rivets is governed by the materials of which they are made.,选择铆钉主要需考虑铆接
2、处的强度,To determine which kind of rivet to use, we should consider the strength required for the riveted joint.,Translate following questions in to English,铆钉的材料可由它头部的标记来识别,The material of the rivet can be identified by the marking on the head of the rivet.,从件号中可知铆钉的直径和长度,The part number shows the dia
3、meter and the length of the rivet.,Translate following questions in to English,常见的两种铆钉头型是沉头和普通头,The two common head styles of rivet are count sunk head and universal head.,正确地识别不同种类的铆钉, 对航空维修技术人员来说，是非常重要的,It is important that the aviation maintenance technician be able to correctly identify the diff
4、erent types of rivets,MS20470 AD5-6 / AN470 AD5-6:,(1) MS or AN: the standard to which the rivet is manufactured MS: Military Standard AN: Army Navy or Airforce Navy standard(2) 20470 or 470: the head styleMS20426 or AN426: Aluminum rivets with 100 degree countersunk headsMS20470 or AN470: Aluminum
5、alloy with universal head rivet,Different kind of rivet head,The mark in rivet head,A: 1100H14 commercial pure aluminum rivet, having a smooth head with no markings,AD: 2117T4 aluminum alloy rivet (also called field rivet), with a dimple in the head,B: 5056 aluminum alloy rivet, with a raised cross
6、on the head. Magnesium is the main alloying element. It rivets magnesium parts.,The mark in rivet head,DD: 2024T4 aluminum alloy (also called icebox rivet), with two ways dashes on the head. It needs special treatment before used and has the greatest bearing and shear strength.,The mark in rivet hea
7、d,D: 2017T4 aluminum alloy (also called icebox rivet), with raised teat on the head. It needs special treatment before used. 2017T4 and 2024T4 aluminum alloy rivet are used in areas of the aircraft where more than the usual amount of strength is required.,The mark in rivet head,MS20470 AD5-6 / AN470
8、 AD5-6:,5: 5/32 inch, the diameter of the rivet shank in thirty second of an inchThe diameter must not be less than the combined thickness of the parts to be riveted.,MS20470 AD5-6 / AN470 AD5-6:,-6: 6/16 inch, the length of the rivet shank in sixteenth of an inch. Notice: Countersunk rivets are mea
9、sured from the top of rivet head to the end of the shank. The universal head rivets are measured along the length of the rivet shank only.,The length of a rivet shank protruding through the material to be joined before driving should be at least one and one half times the rivet diameter. (To form th
10、e shop head of rivet.),MS20470 AD5-6 / AN470 AD5-6:,Thus in our example, the amount of rivet shank protruding through the material must be as least 1/4 of an inch, rounding to the nearest sixteenth铆钉杆直径为5/32英寸，5/32乘以1.5等于15/64, 圆整后是1/4英寸。,MS20470 AD5-6 / AN470 AD5-6:,Translate following questions in
11、 to English,我需要50颗DD冰箱铆钉. 这是件号,I need 50 DD icebox rivets. Here is the part number.,DD 代表铆钉的材料是2024铝合金的,DD stand for (means that) the material of the rivet is 2024 aluminum alloy.,Translate following questions in to English,我们的2024冰箱铆钉用完了，你要2017冰箱铆钉吗？,We havent 2024 icebox rivet anymore, do you want some 2017 icebox rivets?,它们的件号不同，两种铆钉的强度不同，我想不能用2017代替2024,Their part numbers are not the same. The strength of two kinds of rivet are different, I dont think 2017 could replace 2024.,Some kind of blind rivets,Some kind of blind rivets,
