10-6 A helical compression spring is to be made of oil-tempered wire of 4-mm diameter with a spring index of C = 10. The spring is to operate inside a hole, so buckling is not a problem and the ends can be left plain. The free length of the spring should be 80 mm. A force of 50 N should deflect the spring 15 mm. (a) Determine the spring rate. (b) Determine the minimum hole diameter for the spring to operate in. (c) Determine the total number of coils needed. (d) Determine the solid length. (e) Determine a static factor of safety based on the yielding of the spring if it is compressed to its solid length.

10-6 A helical compression spring is to be made of oil-tempered wire of 4-mm diameter with a spring index of C = 10. The spring is to operate inside a hole, so buckling is not a problem and the ends can be left plain. The free length of the spring should be 80 mm. A force of 50 N should deflect the spring 15 mm. (a) Determine the spring rate. (b) Determine the minimum hole diameter for the spring to operate in. (c) Determine the total number of coils needed. (d) Determine the solid length. (e) Determine a static factor of safety based on the yielding of the spring if it is compressed to its solid length.

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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Oil-tempered wire of 5 mm diameter is used to make a helical compression spring shown in Figure 3. The spring index would be, C=12. The spring will be operated inside a bore, therefore buckling is insignificant. Both ends are left plain. The spring free length is 100 mm. An axial force of 75 N should deflect the spring by 10 mm. a) Determine the spring rate, k. b) Determine the minimum hole diameter for the spring to operate. c) Determine the total number of coils needed. d) Determine the solid length, Ls. e) What force, F's is needed to compress the spring to its solid length? ) Determine the largost shear stross in the spring due to the force Fs. Fs Lo Figure 3
Oil-tempered wire of 5 mm diameter is used to make a helical compression spring shown in Figure3. The spring index would be, C = 12. The spring will be operated inside a bore, therefore bucklingis insignificant. Both ends are left plain. The spring free length is 100 mm. An axial force of 75 Nshould deflect the spring by 10 mm.
Design a helical compression spring to be used in a cam and follower mechanism made of oil tempered carbon steel, is subjected to a load which varies from 416 N to 950 N. The spring index is 6.7 and the design factor of safety is 1.25. If the yield stress in shear is 770 MPa and endurance stress in shear is 350 MPa,find: 1. Size of the spring wire, 2. Diameters of the spring, 3. Number of turns of the spring, and 4. Free length of the spring. The compression of the spring at the maximum load is 30 mm. The modulus of rigidity for the spring material may be taken as 80 kN/mm2.
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A helical compression spring is used to absorb heavy vibrations. Apply mechanical engineering design theory and by using the values given in the table below, (i) Calculate the force applied on the spring. (ii) Determine the number of turns. (iii) Determine the spring stiffness. (iv) Calculate the free length. (v) Would you recommend to increase the number of turns and free length of the spring for this application ? Why? (answer in one/two sentences only). Spring data Туре Helical squared and ground ends Initial Compression of spring 20 mm Further Compression of spring after applying heavy load Shear Stress Modulus of rigidity 60 mm 500 N/mm2 82000 MPa Wire diameter 10 mm 6. Spring Index
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a helical compression spring with squared and ground ends is ti be made of a steel wire 79 gpa and presetting is to be used. the operation load of the spring can be considered static. If the maximum working force is 292 N and a force of 35 N is required when the spring is 30 mm longer, determine the spring constant k
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A helical compression spring has a scale of 400 lb/inch, an inside diameter of 2.5 inches, a free length of 8 inches and with squared and ground ends. Material is to be chrome vanadium steel. For a load, P, of 750 pounds, and for average service, determine the solid height. Working stress is 63 ksi, G = 10,800 ksi.