Product Definition and Feasibility of Initial Concepts - Assignment Example

Student’s Name Professor’s Name Course Title Date Product definition and feasibility of initial concepts Product Design Specification The main aim of the project is to design a device that will carry payload from the ground to a shelf which has a hole in order to clear the pole as offloads the payload. The device will be powered by an unmodified, single, off-the-shelf, snap-style mousetrap and the payload will consist of a small lead weight. This device enables the payload move from lower point to upper level of shelf. In this design, payload that is transported in device should be able to be held down by the arm. However in order for them to be transported easily, the system capability and characteristics of the device. In designing the device three variables are involved flow rate, distance to be covered by payload during the transportation is important in design the device as this will enable one understand the minimum transport capability. The design Specification will be Materials for construction of the device should have light weight The device should have the ability to lift light weight on a free standing pole and should be powered by an unmodified, single, off-the-shelf, snap-style mousetrap It should have a life span of 6 years and annual maintenance There should be after sale service to customers of 2months It should cost between $80 to $ 100 but that depends on freight charges. The device should be easy to maintain and install by customers. CONSTRAINTS Should have the ability to user mousetrap power Should be able to use free stand pole CRITERIA The concepts should be ranked 1,2 and 3 should be developed further while concept 5 should be considered for development with some modification. The scoring were rated using the following scale Relative performance rating Much worse than 1 Worse than 2 Same as 3 Better 4 Much better than 5 Alternatives design option 1  The cost of maintenance is low as well requires less activities in terms of repair. This makes it the best in providing power drive for the device as compared to other option. Option 2 This option is one of the best in terms of maintenance, installation and usage. It is uses small space and provides effective movement and good performance compared to the other designs. The best advantage this design provides is that it has a variable speed control with the help of the mousetrap. Option 3 This system uses cable to hold payload system to lift up load to the next tier then to its shelf place. it require materials of high shear strength as well a locking system. This makes it less costly to manufacture and install. The next is another design call swing system; Evaluation The design of device various parameters needs to be considered and they include; In the table below + means that the concept is rated better than while 0 means the same and – means it worse off. requirements efficiency Weight power lever screw Fast & easy parts replacement 0 + + + 0 durability + + + + 0 Manufacturing cost + 0 - - - High performance 0 - 0 0 0 Easy to use and repair 0 0 0 + - Low drag + + 0 0 0 compatible 0 - - 0 + Sum + 3 3 2 3 1 Sum 0 4 2 4 3 4 Sum - 0 2 2 1 2 Net score 3 1 0 2 -1 rank 1 3 5 2 6 Continue yes yes combine yes No From the above concept generation we can state that concepts ranked 1,2 and 3 should be developed further while concept 5 should be considered for development with some modification. The scoring were rated using the following scale Relative performance rating Much worse than 1 Worse than 2 Same as 3 Better 4 Much better than 5 Rating Option 1 Option 3 Option 3 requirements Weight (%) rating weighted score rating Weighted score rating weighted score Reliability 15 4 0.6 4 0.6 3 0.45 Sustainability 10 3 0.3 4 0.4 4 0.4 Manufacturing cost 15 2 0.3 2 0.3 3 0.45 Access Maintenance and Repair 15 3 0.45 3 0.45 4 0.6 Efficiency 15 3 0.45 4 0.6 5 0.75 Safety 20 4 0.8 3 0.6 4 0.8 Durability 10 3 0.3 3 0.3 4 0.4 Total score 3.2 3.25 3.85 rank 3 2 1 Action Reject Reject Develop Option three should be selected because it has the highest score of 3.85 Detailed and accurate illustration of the chosen concept The sides of the machine Section A Figure 1: Section B Flipper- This plate is the part where the load is held during lifting and exit into the device into shelf. It is decided by the team to manufacture this by steel having it bolted to a steel frame as shown below: of the device system Structural Analysis It is extremely important to conduct a structural analysis on every design where safety is a huge factor needed to be considered because it helps to identify the stress points and how to make it stronger in order to withstand the load. The solution usually ends up by increasing the dimension or by using another material. Free stand This is placed underneath the pole and support stands helping to protect the frame from scratches increasing its durability and reducing maintenance activities. The diameter for these stands is 8cm with a thickness of 1cm and is widely available in many shops all around. Pulley and Cable system This system is where the winch system is being operated along with a cable helping to change the direction of motion which in turn changes the force direction. A total of a pulley is being used. The first connection is between the cable and the winch device extending it around the pulley and then locked into the hook placed on the platform. When the power is switched on and movement is in the anti-clockwise direction, the cable is pulled towards the platform allowing it to move forward with the help of the rack and pinion until it reaches its maximum length putting the motor to a complete stop. The manufacturing techniques The design was done successfully to understand the methods of loads carriage and the concepts of flow process that happens inside device.. The machine will not require large industrial manufacturing but will assemble by small industry. The manufacturer will offer six months of maintenance and free installation and usage. It is uses small space and provides effective movement and good performance compared to the other designs. After double-checking the installing, the machine will be suitable for lift small payloads from the ground. The user will load the loads into the device and then it be lifted up. The justifications for this engineering device is based on the fact that people require it that will help in in lifting materials into shelf, since they are expensive in the market. There is a need to therefore formulate ways and methods of ensuring such processes attain maximum utilization of the available resources at a controlled approach. Reference List Lewin, D.R., Seider, W. D. & Seade, J.D. (2002). ‘Integrated process design instruction’, Computers and Chemical Engineering, vol. 26, no.2, pp. 295-306. Williams, K.C., (2008). Dense phase pneumatic conveying of powders: Design aspects and phenomena. Doctoral dissertation, University of Newcastle, Australia. Williams, K. C.,& Jones, M. G. (2003). Classification diagrams for dense-phase pneumatic conveying. Powder Handling and Processing, 15(6), 368–373. Read More