Dimensions should be made not from points, but from specific surfaces or points on the part itself if at all possible. This enables making of fixture and gauge, Also helps avoid tooling, gauge, and measurement errors. Dimensions should all be from one datum line rather than from a variety of points to simplify tooling and gauging and avoid overlap of tolerances. General design guide lines of DFM 6. Once functional requirements have been fulfilled, Designers should strive for minimum weight consistent with strength and stiffness requirements, Along with a reduction in materials costs.
Whenever possible, design to use general-purpose tooling rather than special tooling dies, form cutters, etc. Avoid sharp corners; use generous fillets and radii. This is a universal rule applicable to castings and molded, formed, and machined parts General design guide lines of DFM 9. Design a part so that as many manufacturing operations as possible can be performed without repositioning it.
Whenever possible, cast, molded, or powder-metal parts should be designed so that stepped parting lines are avoided. With casting and molding processes, design workpieces so that wall thicknesses are as uniform as possible overcome the shrinkage effect. Space holes in machined, cast, molded, or stamped parts so that they can be made in one operation without tooling weakness. Westinghouse curve When costs are determined. Westinghouse curve The general conclusion is inescapable: Total product costs are established very early in the product realization process.
Therefore, it makes manufacturers to minimize these life-cycle costs, most effectively-during the design process for their products. Designing for Low cost Various approaches exist to determine the goals for costs and the pricing of products. Design for Cost Approaches 1. Cost-Based Pricing 2. Price-Based Costing Target Costing From that, profits, selling costs, and overhead are subtracted to determine the target cost for parts and labor Design Very Low Cost Products 1.
Quantify all costs. Without quantifying overhead costs, cost reduction strategies will focus on just parts and labor. Avoid policies that inhibit real cost reduction opportunities or drain resources. Industrial Design of Plastics Products lists all steps necessary for effectively designing a plastic product for any industry.
Physical properties and agency codes are listed, as well as full checklists for all areas of product design, contract, material selection, assembly techniques, manufacture, tooling, decoration, and shipping. The text also offers a list of examples with corresponding case studies to illustrate key concepts. Industrial Design of Plastics Products provides a more detailed treatment in the basics of the subject than any other available resource, proving invaluable to design, chemical, and electrical engineers; materials scientists; and plastics manufacturers.
These technologies have the potential to revolutionize future products with built-in functionality such as sensors, smart packaging, and damage detection technology for everything from milk bottles and salad packaging to automotive bumpers and plane fuselages.
This book introduces the three core manufacturing methods for multifunctional materials, composites, injection molding, and 3D printing, all processes facing challenges for the implementation of new technology. Users will find a book that brings together both process and material advances in this area, giving process engineers, designers, and manufacturers the information they need to choose the appropriate material and process for the product they are developing.
Provides an introduction to the latest technologies in the area of multifunctionality, enabling engineers to implement new breakthroughs in their own businesses Gives an understanding of the processes that need to be considered in both design and manufacture of future devices, while using materials from a broader palette than used in existing manufacturing processes Includes best practice guidance and flow charts to aid in material and process selection Covers revolutionary future products with built-in functionality such as sensors, smart packaging, and damage detection technology for everything from milk bottles and salad packaging to automotive bumpers and plane fuselages.
Score: 4. The concise and comprehensive information defines and focuses on past, current, and future technical trends. The handbook reviews over 20, different subjects; and contains over 1, figures and more than tables. Engineers and engineering companies now use 3D printing to make prototypes of products before going for full production. In an educational setting faculty, researchers, and students leverage 3D printing to enhance project-related products. Additive Manufacturing Handbook focuses on product design for the defense industry, which affects virtually every other industry.
Thus, the handbook provides a wide range of benefits to all segments of business, industry, and government. Manufacturing has undergone a major advancement and technology shift in recent years. Cutting-edge coverage of the new processes, materials, and technologies that are revolutionizing the manufacturing industry Expertly edited by a past president of the Society of Manufacturing Engineers, this state-of-the-art resource picks up where the bestselling Design for Manufacturability Handbook left off.
Within its pages, readers will find detailed, clearly written coverage of the technologies, and processes that have been developed and adopted in the manufacturing industry over the past sixteen years. More than this, the book also includes hard-to-find technical guidance and application information that can be used on the job to actually apply these cutting-edge processes and technologies in a real-world setting.
Essential for manufacturing engineers and designers, Design for Advanced Manufacturing is enhanced by a host of international contributors, making the book a true global resource. Achieve any cost goals in half the time and achieve stable production with quality designed in right-the-first-time. This second edition extends the proven methodology to the most advanced product development process with the addition of the following new, unique, and original topics, which have never been addressed previously.
It includes incorporating dozens of proven DFM guidelines through up-front concurrent-engineering teamwork that cuts the time to stable production in half and curtails change orders for ramps, rework, redesign, substituting cheaper parts, change orders to fix the changes, unstable design specs, part obsolescence, and late discovery of manufacturability issues at periodic design reviews. Product development teams are composed of an integrated group of professionals working from the nascent stage of new product planning through design creation and design review and then on to manufacturing planning and cost accounting.
An increasingly large number of graduate and professional training programs are aimed at meeting that need by creating a better understanding of how to integrate and accelerate the entire product development process.
Altium Community. More content by Happy Holden. Recent Articles. Read Article. He talks about how he thinks this new partnership will bring bi-directional value to both organizations. How to Design to a Differential Impedance Specification Differential impedance is sometimes misunderstood and it depends on multiple factors.
Learn more about trace width design needed to reach a specific differential impedance target. Listen to this episode to learn more about Altium's mission. Is It Printed or a Component? How to Solve Your Engineering Design Review Challenges Electrical engineering design reviews should focus on manufacturability, functionality, and reliability. Expert Mark Harris explains the importance of project conception in this article.
Should You Use Tight vs. Loose Differential Pair Spacing and Coupling? We get a lot of questions about trace impedance and how to calculate the right trace size to hit a specific impedance in a manufacturable PCB.
Just as important as determining an appropriate trace width for a single-ended trace is determination of an appropriate spacing between two traces in a differential pair.
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