Design for manufacturing and assembly Assignment help UK
This seminar will include information on how DFM+A fits in with QFD, concurrent engineering, robust engineering, and other disciplines. In addition, there will be a brief demonstration of computer software tools, which simplify the DFM+A analysis.
By attending this seminar, you will be able to:
- Perform Design for Assembly (DFA) Analysis using the BDI Manual (Worksheet) Method
- Perform DFM Analysis (manufacturing cost estimation)
- Apply Design for Service (DFS) Principles
- Reduce your company’s production costs by analyzing and eliminating the factors that greatly affect the time, cost, and quality of manufacturing, assembly and service processes
- Use effective analysis, brainstorming, and trade-off techniques for redesigning assemblies and subassemblies
- Each participant will receive and use the hard-bound authoritative reference textbook “Product Design for Manufacture and Assembly”, written by Geoffrey Boothroyd, Peter Dewhurst and Winston Knight.
- You are also asked to bring a calculator capable of making simple calculations.
Much of the early and significant work on DFM and DFA was done in the early 1970s by Boot hroyd and Dewhurst. Conventionally, product development was essentially done in several stages. The designer(s) (who usually had very good knowledge of materials, mechanisms, etc.) would design the product, and sometimes would construct working prototypes. Once the prototype was tested and approved, the manufacturing team would then construct building plans for the product, including the tooling etc. Often, different materials (e.g. different thickness or type of sheet metal), and different components (e.g. different sized screws etc.), would be substituted by the manufacturing team. Their goal was to achieve the same functionality, but make mass production more efficient. But, the majority of the design remained unchanged, since the manufacturing engineers could never be sure whether a change would affect some operational requirement. Two things changed in the 1970’s: (i) Many new types of plastics were developed, and injection molding technology became widely available, resulting in the possibility of low cost plastic components. The idea here was that a combined team of engineers and management would be assigned to each new product. This team may consist of mechanical designers, electrical engineers, software engineers, production engineers, marketing and sales, and administration. Thus, as the design was being createdby the designers, the production people would give feedback about feasibility to manufacture, more economical alternatives etc. At the same time, sales people would negotiate of product outlook and features, and so on. The biggest advantage of CE
2. Use standard commercially available components. Design time and effort are reduced. Design of custom-engineered components is avoided. There are fewer part numbers. Inventory control is facilitated. Quantity discounts may be possible.
3. Use common parts across product lines. There is an opportunity to apply group technology. Implementation of manufacturing cells may be possible. Quantity discounts may be possible.
4. Design for ease of part fabrication. Net shape and near net shape processes may be feasible. Part geometry is simplified, and unnecessary features are avoided. Unnecessary surface finish requirements should be avoided; otherwise, additional processing may be needed.
5. Design parts with tolerances that are within process capability. Tolerances tighter than the process capability should be avoided; otherwise, additional processing or sortation will be required. Bilateral tolerances should be specified.
. Design the product to be foolproof during assembly. Assembly should be unambiguous. Components should be designed so they can be assembled only one way. Special geometric features must sometimes be added to components to achieve foolproof assembly.
. Minimize use of flexible components. Flexible components include parts made of rubber, belts, gaskets, cables, etc. Flexible components are generally more difficult to handle and assemble.Design the product to be foolproof during assembly. Assembly should be unambiguous. Components should be designed so they can be assembled only one way. Special geometric features must sometimes be added to components to achieve foolproof assembly
8. Design for ease of assembly. Part features such as chamfers and tapers should be designed on mating parts. Design the assembly using base parts to which other components are added. The assembly should be designed so that components are added from one direction, usually vertically. Threaded fasteners (screws, bolts, nuts) should be avoided where possible, especially when automated assembly is used; instead, fast assembly techniques such as snap fits and adhesive bonding should be employed. The number of distinct fasteners should be minimized.
9. Use modular design. Each subassembly should consist of five to fifteen parts. Maintenance and repair are facilitated. Automated and manual assembly is implemented more readily. Inventory requirements are reduced. Final assembly time is minimized.
10. Shape parts and products for ease of packaging. The product should be designed so that standard packaging cartons can be used, which are compatible with automated packaging equipment. Shipment to customer is facilitated.
11. Eliminate or reduce adjustment required. Adjustments are time-consuming in assembly. Designing adjustments into the product means more opportunities for out-of-adjustment conditions to arise.
Design for Manufacturing (DFM) is all about reducing the cost of piece-parts. Design for Assembly is all about reducing the cost of putting things together (assembly). What’s often forgotten is that function comes first. Change the design to reduce part cost, but make sure the product functions well. Change the parts (eliminate them) to reduce assembly cost, but make sure the product functions well We offer Design and Manufacturing experts &professionals for Design and Manufacturing assignment help & Design and Manufacturing homework help. Our 24/7 support & services for Design and Manufacturing assignment problems & assignment solutions are available at competitive prices. Design and Manufacturing Online experts are available online.
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