5. For the flat spring shown below (Ball feed device), with L = 65mm, t = 0.8 mm and b = 6 mm. Radius 12.5 mm Circular eccentric i. Ymax= ii. Ymin = A FmaxL3 B Himm Fmin L³ 3EI Eccentricity Cam 2.5 mm Center of rotation a) Find Fmax and Fmin if you know that: -b |---|| -Follower Total excursion of follower 5.0 mm during one revolution (a) Cross section of spring (enlarged) Bearing Flat spring- Ejection of one ball b) Find max and omin at the point of maximum stress. c) Find dea and dem Ymax = 8.0 mm Ymin=3.0 mm (b) Ball feed device (Assume the deflection shown in the figure is at the place where the force is being applied) The spring is made of steel (E = 207 GPa; Sut = 1500 MPa), has been hot rolled and you want a reliability of 95%. The maximum operating temperature is 45 °C. d) If a constant what would be the safety factor? dem e) If a life of 104 cycles is desired, what is the new safety factor under the same condition as d?

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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5. For the flat spring shown below (Ball feed device), with L = 65mm, t = 0.8 mm and b = 6 mm.
Radius 12.5 mm
Circular eccentric
i. Ymax =
ii. Ymin =
TIM
Fmin L3
3EI
Eccentricity
-2.5 mm
Cam
b
Center of
rotation
a) Find Fmax and Fmin if you know that:
Fmax L³
3EI
Follower
Total excursion of
follower 5.0 mm
during one revolution
Bearing
(a) Cross section of spring
(enlarged)
Flat spring-
Ejection of
one ball
b) Find omax and Omin at the point of maximum stress.
c) Find dea and Tem
Ymax = 8.0 mm
Ymin = 3.0 mm
(b) Ball feed device
(Assume the deflection shown in the figure is at the place where the force is being applied)
The spring is made of steel (E = 207 GPa; Sut = 1500 MPa), has been hot rolled and you want
a reliability of 95%. The maximum operating temperature is 45 °C.
d) If a constant what would be the safety factor?
Tem
e) If a life of 104 cycles is desired, what is the new safety factor under the same condition as d?
Transcribed Image Text:5. For the flat spring shown below (Ball feed device), with L = 65mm, t = 0.8 mm and b = 6 mm. Radius 12.5 mm Circular eccentric i. Ymax = ii. Ymin = TIM Fmin L3 3EI Eccentricity -2.5 mm Cam b Center of rotation a) Find Fmax and Fmin if you know that: Fmax L³ 3EI Follower Total excursion of follower 5.0 mm during one revolution Bearing (a) Cross section of spring (enlarged) Flat spring- Ejection of one ball b) Find omax and Omin at the point of maximum stress. c) Find dea and Tem Ymax = 8.0 mm Ymin = 3.0 mm (b) Ball feed device (Assume the deflection shown in the figure is at the place where the force is being applied) The spring is made of steel (E = 207 GPa; Sut = 1500 MPa), has been hot rolled and you want a reliability of 95%. The maximum operating temperature is 45 °C. d) If a constant what would be the safety factor? Tem e) If a life of 104 cycles is desired, what is the new safety factor under the same condition as d?
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