A cover of a boiler shall be fastened with 6 studs. The pressure in the boiler is 40 bar. The material of the screw is 8G it has (- 640 N/mm2) and boiler body 4D(a, 640 N/mm2) %! 30 30 ko 300 400D 6000 1. The working load per screw (F) 2. The preload (Fp) 3. The thread diameter (d) Determine:

A cover of a boiler shall be fastened with 6 studs. The pressure in the boiler is 40 bar. The material of the screw is 8G it has (- 640 N/mm2) and boiler body 4D(a, 640 N/mm2) %! 30 30 ko 300 400D 6000 1. The working load per screw (F) 2. The preload (Fp) 3. The thread diameter (d) Determine:

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Metrology of Screw Threads

Screw threads are a series of ridges having the profile of a helix. This helix profile runs continuously along the length of a uniform solid or a hollow bar of a circular cross-section at periodic intervals. These helix ridges are also formed over a conical bar. These continuous helical ridges are termed threads.

Question

1
Problem No.2
A cover of a boiler shall be fastened with 6 studs. The pressure in the boiler is 40 bar. The
material of the screw is 8G it has (= 640 N/mm2) and boiler body 4D(a, = 640 N/mm2)
30
30
ko 300
4000
6000
1. The working load per screw ( F)
2. The preload (Fp)
3. The thread diameter (d)
4. Elongation and compression rate(Cs, Cf)
5. Maximum force (Emax.)
6. Draw screw diagram
7. Tightening moment ( Mti.)
8. Wrench length (Lw) take hand force Fh- 200 N
9. The equivalent stress (o, ).
Determine:

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