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山东专升本机械问答题集合(Shandong upgraded mechanical question and answer set)
山东专升本机械问答题集合(Shandong upgraded mechanical question and answer set)
Thread connection
1. questions: what are the types of common threads?
2. questions: which threads are mainly used for join? Which threads are mainly used for transmission?
3. questions: what are the basic types of threaded connections?
Question 4.: what is the purpose of tightening the thread connection?
5. questions: thread connection anti loose method, according to the principle of work can be divided into which kinds?
6. question: what are the major failure modes of tension bolts?
Question 7.: what is the major form of failure of the shear bolts?
8. question: in order to improve the fatigue strength of the bolt, what measures can be taken to reduce the stress amplitude when the maximum stress of the bolt is constant? Three examples of structure are given.
9. questions: when the thread connection design has met the self-locking condition, why must the design also take effective measures to prevent looseness?
Question 10.: what is the mechanism of the lateral load between the ordinary bolt joint and the reaming bolt by the transverse load? When the lateral loads act on the two connections at the same time, which joint size is larger?
Question 11.: the total tension F2 of the bolt is equal to Fo + F when it is subjected to the tight bolt connection of the pretightening force Fo and the work tension F Why?
Question 12.: what is the meaning of the coefficient 1.3 in the tensile strength condition of the bolt for tight bolt connection?
Hub coupling
1. questions: what is the function of the key link?
2. questions: what are the main types of key links?
3. questions: what kinds of flat keys are divided into?
Question 4.: what is the difference between the flat and the slip keys?
Question 5.: what are the advantages and disadvantages of the semicircle key connection compared with the plain flat key connection?
6. question: what are the main failure modes of plain flat keys?
7. questions: what are the main f
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