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Assessing component reliability using fatigue testing

ID: 1530286
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(PresseBox) - Unlike machining, 3D metal printing is a relatively new production technology. The innovative method offers many advantages, including its ability to produce parts with internal cavities, lattice structures or particularly thin-walled geometric shapes. However, the quality and surface finish of components is pivotal, especially in applications where ensuring safety and gaining certifications is important. This is why in addition to analysing the powder used, toolcraft evaluates the properties of additively manufactured test pieces, as these are representative of the subsequently produced components. The company has now developed the means of using metrology to test the fatigue strength of various metals.

Using fatigue testing to determine dynamic strength

Fatigue strength describes how materials change shape or fail when exposed to cyclic stress. Until fatigue testing was introduced, component strength was only determined using tensile testing. However, new demands placed on materials also require their dynamic strength to be analysed. By performing alternating tensile and fatigue tests, it is possible to use fatigue diagrams, such as the Smith diagram, to evaluate all stresses relevant to a particular system and, as a result, the reliability of the material being processed. Innovations such as "predictive maintenance", which is an Industry 4.0 technology, require detailed knowledge about how materials behave, while mechatronic systems demand cross-system reliability testing.

Fatigue testing using the W

During fatigue testing, the material is examined using the Ws are considerable as well. The test begins by clarifying the three main stresses ? tensile and compressive stress, bending stress and torsional stress. After this, a suitable test stand is selected and test pieces are produced in accordance with the applicable standards. This process is generally per curve to be calculated. During the test, a condition monitoring system analyses how the material behaves under the alternating stress. In doing so, it identifies limits that allow conclusions to be drawn about the expected durability of the component in its actual area of use.



Extending the process chain

Without fatigue testing, component reliability can only be evaluated on the basis of tensile test data. However, the German FKM guideline (Arithmetical Proof of Strength of Mechanical Engineering Parts) demands specific factors of safety for system evaluations (generally a factor of safety greater than 2). If, however, material use is reduced, for example, factors of safety below 2 are required. This can only be verified using fatigue testing. By adding fatigue testing to its portfolio, toolcraft is once again extending its range of services along the complete process chain in-house, from the initial idea and manufacturing to the finished, qualified part.

toolcraft is a pioneer of forward-looking technologies, such as 3D metal printing and the construction of customised turnkey robotics solutions. The company tests and develops innovative engineering processes until they are ready to be used on production lines. As a provider of comprehensive solutions, toolcraft covers the entire process chain, from the initial idea to manufacturing, quality assurance and testing in the areas of CNC machining, 3D metal printing, injection moulding, spark erosion (EDM) and mould making. Its clients include market leaders in the semiconductors, aerospace, medical technology, optical, special machinery manufacturing, motor sports and automotive industries. Building close working relationships with collaborative partners as well as universities, other institutions of higher education and research centres is an important part of its corporate philosophy. The medium-sized family-owned company, located in Georgensgm



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toolcraft is a pioneer of forward-looking technologies, such as 3D metal printing and the construction of customised turnkey robotics solutions. The company tests and develops innovative engineering processes until they are ready to be used on production lines. As a provider of comprehensive solutions, toolcraft covers the entire process chain, from the initial idea to manufacturing, quality assurance and testing in the areas of CNC machining, 3D metal printing, injection moulding, spark erosion (EDM) and mould making. Its clients include market leaders in the semiconductors, aerospace, medical technology, optical, special machinery manufacturing, motor sports and automotive industries. Building close working relationships with collaborative partners as well as universities, other institutions of higher education and research centres is an important part of its corporate philosophy. The medium-sized family-owned company, located in Georgensgmünd and Spalt, was founded by Bernd Krebs in 1989.

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published by: PresseBox
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Date: 12/11/2017 - 03:51
Language: English
News-ID 1530286
Character count: 5513
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Firma: MBFZ toolcraft GmbH
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Stadt: Georgensgmünd
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