Machine Design

Bolt & Weld Design The figure shows the arrangement of a support bracket for a larger style security camera/monitor/recorder unit, where the detachable plate is secured to a universal beam by four black bolts. The fixed plate arm, 8 mm wide x 50 mm deep, is welded to the detachable plate as indicated. If the bracket is required to support the unit and other security equipment of total mass 125 kg and a load factor of 1.6 is required, determine: i) the required bolt diameter, assuming Grade 4.6 black bolts are to be used; ii) iii) the required fillet weld leg length, assuming Grade 43 weld electrode material; whether the bolt spacings are adequate. 4 black bolts 160 mm Please refer to your notes on the Design of Bolts and Welds to obtain the necessary material data for the bolts and weld. Fillet weld around plate perimeter Engineering Design & Analysis 3 (M2H120320) 80 mm 600 mm 125 kg Monitor Recorder [10] -8 mm wide x 50 mm deep plate [10] [5]

A car weighs 2200 lb, with 65% of this weight on the front tires. Assume all four tires are inflated to 32 psig at 10°F, and the tires carry no vertical loads in their side walls. Atmospheric pressure is 14.7 psi. Find the total contact area between the tires and the road [in']. Now assume the temperature rises to 100°F with no leakage or volume change. What will be the total tire-road contact area now [in?1?

2. (5 Points) : Choose a device or product that you believe can be improved upon. Answer the following questions: a) what do you already know about this device/ product; b) what are the main functions of this device/ product; and d) Is there a room for improvements? Write a short report to summarize your findings.

Determine the change in kinetic energy. (You must provide to the next part.)an answer before moving on The change in kinetic energy is_______kJ/kg.

1. (5 Points): Choose an engineering company that you would someday consider working for. From the information found on their Web site, write a one-page paper on the engineering problems that they are solving, projects, and how they are addressing their customer's needs.

On the part below, apply position controls to allow the holes to move 0.4 side to side, butonly .1 in the up and down direction. Include references to datum features A, B, and C in thefeature control frames. [5 pts.]

Determine the exit temperature. (You must provide part.)an answer before moving to the next The exit temperature is________K.

3. On the part below, apply a cylindrical position control of 0.25 @ MMC with respect to datums A, B, and C. [10 pts.]

A V-block clamp consists of 3 components a base, yoke and adjusting screw. Using a rule, measure the sketches below and produce a 3rd angle projection drawing for each component. All drawing must be fully dimensioned, with the relevant projection symbol, on a completed drawing sheet. Indicate the important tolerances for each component. A completed 2 view assembly drawing is also required showing each component in its relevant position,with information bubbles relating to a parts list on the drawing. The parts list must indicate, part name,page number, material, and number off, for each component.

4. (2 points) Show a test matrix for a two-level full factorial experimental design where the three factors to be investigated are: Color (Red/Blue), Shape (square/hex), and Size (big/little). Include the levels for the 2-factor interactions.