This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. In manufacturing and mechanical engineering, flatness is an important geometric condition for workpieces and tools. In the manufacture of precision parts and assemblies, especially where parts will be required to be connected across a surface area in an air-tight or liquid-tight precision Manufacturing PDF, flatness is a critical quality of the manufactured surfaces. Such surfaces are usually machined or ground to achieve the required degree of flatness.
Författare: David Dornfeld.
Today there is a high demand for high-precision products. The manufacturing processes are now highly sophisticated and derive from a specialized genre called precision engineering. Precision Manufacturing provides an introduction to precision engineering and manufacturing with an emphasis on the design and performance of precision machines and machine tools, metrology, tooling elements, machine structures, sources of error, precision machining processes and precision process planning. As well as discussing the critical role precision machine design for manufacturing has had in technological developments over the last few hundred years. In addition, the influence of sustainable manufacturing requirements in precision processes is introduced.
Drawing upon years of practical experience and using numerous examples and illustrative applications, David Dornfeld Dae-Eun Lee cover precision manufacturing as it applies to:
The importance of measurement and metrology in the context of Precision manufacturing.
The role of sensors in precision manufacturing and how they can reduce uncertainty in systems introduced by interfaces between machine elements, process elements and materials, etc.
New and emerging fields of micromachining and nano manufacturing and their importance and impact on precision manufacturing.
Adherence to precision manufacturing techniques during the production process prevents waste, increases interchangeability among similar parts, lowers the manufacturing cost and increases quality.
Precision Manufacturing will be of interest to design engineers, quality engineers and manufacturing engineers, academics and those who may or may not have previous experience with precision manufacturing, but want to learn more.
This phenomenon is commonly used with gauge blocks. Geometric dimensioning and tolerancing has provided geometrically defined, quantitative ways of defining flatness operationally. Joseph Whitworth popularized the first practical method of making accurate flat surfaces during the 1830s, using engineer’s blue and scraping techniques on three trial surfaces. By testing all three in pairs against each other, it is ensured that the surfaces become flat. Up until his introduction of the scraping technique, the same three plate method was employed using polishing techniques, giving less accurate results. This led to an explosion of development of precision instruments using these flat surface generation techniques as a basis for further construction of precise shapes.
1858, Plane Metallic Surfaces, Longman, Brown, and Co. Measurement of API Rotary Master Gauge on CMM. One of the fundamental principles in precision engineering is that of determinism. System behavior is fully predictable even to nanometer-scale motions.
To do the job efficiently and correctly to fit your need via modern machinery. The basic idea is that machine tools obey cause and effect relationships that are within our ability to understand and control and that there is nothing random or probabilistic about their behavior. Everything happens for a reason and the list of reasons is small enough to manage. By this we mean that machine tool errors obey cause-and-effect relationships, and do not vary randomly for no reason. Further, the causes are not esoteric and uncontrollable, but can be explained in terms of familiar engineering principles.
Reduce the dispersion of the product’s or part’s function. Eliminate fitting and promote assembly, especially automatic assembly. Enable the design safety factor to be lowered. Improve interchangeability of components so that corresponding parts made by other factories or firms can be used in their place. Improve quality control through higher machine accuracy capabilities and hence reduce scrap, rework, and conventional inspection. Make functions independent of one another. Achieve greater miniaturization and packing densities.
Achieve further advances in technology and the underlying sciences. Copyright status of work by the U. NIST Programs of the Manufacturing Engineering Laboratory. Please forward this error screen to rhi. Known nationally for over 60 years, Columbia Metal Spinning is proud to provide high quality in-house metal manufacturing services with state-of-the-art machinery.
This tradition is exemplified by our precision metal stamping services. By investing in advanced metal forming equipment, we are able to cost effectively produce components with high accuracy and low production costs. Our products achieve very high levels of quality, meeting standards set by the ANSI, ASTM, ISO, TS, and Mil-Spec. To learn more about the high quality metal stamping see the table below, or contact us directly. By combining its team of experienced technical professionals with a full complement of equipment and processes, VI helps customers create innovative solutions to precision metalworking challenges.