10-23 Problem 10-23 Clamping fixture. A holding fixture for a workpiece 37.5 mm thick at the clamp locations is being designed. The detail of one of the clamps is shown in the figure. A spring is required to drive the clamp upward when removing the workpiece with a starting force of 45 N. The clamp screw has an M10 X 1.25 thread. Allow a diametral clearance of 1.25 mm between it and the uncompressed spring. It is further specified that the free length of the spring should be Lo ≤ 48 mm, the solid height L, 31.5 mm, and the safety factor when closed solid should be n, 1.2. Starting with d = 2 mm, design a suitable helical coil compression spring for this fixture. For A227 HD steel, wire diameters are available in 0.2-mm increments between 0.2 to 3.2 mm. Clamp screw Spherical washer Slot Workpiece Clamp Groove Pin

10-23 Problem 10-23 Clamping fixture. A holding fixture for a workpiece 37.5 mm thick at the clamp locations is being designed. The detail of one of the clamps is shown in the figure. A spring is required to drive the clamp upward when removing the workpiece with a starting force of 45 N. The clamp screw has an M10 X 1.25 thread. Allow a diametral clearance of 1.25 mm between it and the uncompressed spring. It is further specified that the free length of the spring should be Lo ≤ 48 mm, the solid height L, 31.5 mm, and the safety factor when closed solid should be n, 1.2. Starting with d = 2 mm, design a suitable helical coil compression spring for this fixture. For A227 HD steel, wire diameters are available in 0.2-mm increments between 0.2 to 3.2 mm. Clamp screw Spherical washer Slot Workpiece Clamp Groove Pin

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

See similar textbooks

Similar questions

Bolts distributed about a bolt circle are often called upon to resist an external bending moment as shown in the figure. The external moment is 19 kip-in and the bolt circle has a diameter of 15 in. The neutral axis for bending is a diameter of the bolt circle. What needs to be determined is the most severe external load seen by a bolt in the assembly. M Neutral axis R NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. View the effect of the bolts as placing a line load around the bolt circle whose intensity FÅ, in pounds per inch, varies linearly with the distance from the neutral axis according to the relation Fb Fb,max R sin 8. The load on any particular bolt can be viewed as the effect of the line load over the arc associated with the bolt. For example, there are 12 bolts shown in the figure. Thus, each bolt load is assumed to be distributed on a 30° arc of the bolt circle. Under these conditions, what is the largest bolt…
The figure shows a shaft mounted in bearings at A and D and having pulleys at B and C. The forces shown acting on the pulley surfaces represent the belt tensions. The shaft is to be made of ASTM grade 25 cast iron using a design factor na = 2.8. What diameter should be used for the shaft? 6-in D. 300 lbf 27 lbf 360 lbf D 6 in A 8 in 50 lbf B 8-in D. 8 in
The spring clamping force Fg = 2 N. The contact pressure force FA and the joint forces FB at the jump piece 1 should be determined for the toggle mechanism with a straight guide shown in figure. C 26 mm B 2 10 mm A 1 8 mm 7 mm D 10 mm 15 mm 10 mm
Requlred Information A countershaft carrying two V-belt pulleys Is shown In the figure. Pulley A recelves power from a motor through a belt with the belt tensions shown. The power Is transmitted through the shaft and dellivered to the belt on pulley B. Assume the belt tenslon on the loose side at B Is 15 percent of the tension on the tight side. Glven B(dg) = 400 mm, TA = 575 N, and TỊA2) = 3835.25 N. 300 450 400 TIA T(A2Y `150 250 dia. B(da) 20 dia. B At the point of maximum bending moment, determine the bending stress and the torslonal shear stress. The bending stress at the point of maximum bending moment is [.09515 MPа. The torslonal shear stress at the point of maximum bending moment is 259.442 MPа.
Adjustable pliers hold a round metal bar as a machinist grips the handles with P = 43 N. Using the free body diagram shown for the combined lower jaw and upper handle, calculate the force A that is applied to the bar. Assume lh = 160 mm and l2 = 15 mm. (Express your answer using three significant figures.) A =
5. For the engine-transmission-propeller problem shown below, The engine generates a torque of 219lb-ft, and it is bolted to a frame at locations A and B. The transmission reverses the rotation direction. The transmission ratio is 1.5 (i.e. the propeller speed is -1/1.5 the engine speed, the minus sign indicates the change in direction). d. Sketch the free body diagram. Be sure to show the torques at the input and outputs to the different components. Note the change in the rotation direction between the engine and shaft. e. Solve for the reaction forces at the bolt supports of the engine, if the distance between them is 1 ft. Propeller Engine Reduction ratio 1.5 Engine is attached B
Required information A countershaft carrying two V-belt pulleys is shown in the figure. Pulley A receives power from a motor through a belt with the belt tensions shown. The power is transmitted through the shaft and delivered to the belt on pulley B. Assume the belt tension on the loose side at 8 is 15 percent of the tension on the tight side. Given: T41-550 lbf, T42=82.5 lbt, d4 = 6 in. dg=7.5 in, and dshaft = 1.292 in. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part TAI YAS A(DA) dshaft B(da) Determine the tensions in the belt on pulley 8, assuming the shaft is running at a constant speed The tension on the loose side of the belt ot Bis lbf. The tension on the tight side of the belt at Bis lbf.
The spring clamping force Fg = 2 N. The contact pressure force FA and the joint forces Fg at the jump piece 1 should be determined for the toggle mechanism with a straight guide shown in figure. C 26 mm B 2 10 mm A 1 8 mm 7 mm D 10 mm 15 10 ww ww
A compression spring needed for a machine operation has to fit within a 1-in. diameter hole. To allow for some clearance, the outside diameter of the spring should not be larger than 0.9 in. To ensure a reasonable coil, use a spring index of 9. The spring will be repeatedly cycled from its free length of 3 in. to a length of 2 in. The solid length of the spring is 1 in. The spring should have squared ends and is to be made of music wire. (a) Determine a suitable wire diameter. (b) Determine a suitable number of coils. (c) Determine the spring rate. (d) Calculate the maximum shear stress the spring will experience during fatigue cycling. (e) Show on a stress vs. time plot how the fatigue cycling on the spring will occur. (f) If the spring is unpeened, what will be the shear endurance limit of the spring material in completely reversed cycling? (g) Can the spring survive a million fatigue cycles? Show by calculation.
The figure illustrates the connection of a steel cylinder head to a grade 30 cast-iron pressure vessel using N bolts. A confined gasket seal has an effective sealing diameter D. The cylinder stores gas at a maximum pressure pg. For the specifications given in the table for the specific problem assigned, select a suitable bolt length from the preferred sizes in Table A–17, then determine the yielding factor of safety np, the load factor nL, and the joint separation factor n0. See problem number 8-36, and please use the FEA exponential curve-fit for member stiffness.
An electric motor drives a punch press with a flywheel and is running at 1200 rpm. The torque of the punch press is as follows: a. 0-(10000+10) at first 45deg b. goes to zero for next 45deg c. 0-(6000+10) at next 45deg d. goes to zero for the remainder of the cycle. Employing a Cf of 0.2, a solid steel disc with density of 0.283 lb/in^3, and a thickness of 2 in, determine the flywheel diameter in meters.
Problem Set – Temperature Change 1. A steel tire has a dimensions indicated in the figure below. At 78 degrees Celsius, the said tire was fit into a 1.8m to an engine wheel with 24 degrees Celsius. Calculate the contact pressure between the tire and the wheel after fitting together due to colling of 24 degrees Celsius. The coefficient of expansion due to temperature of the tire is 12.3 micrometer/ m- degrees Celsius and Modulus of Elasticity is EN GPa. | 12 mm | 200 mm 900mm wide steel tire- 12 mm Note: Neglect the deformation of the wheel due to the pressure of the tire Fn- 100