Temat: part - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Limitations of notation system in centred part alignment accuracy imposed by ISO standard and proposal for an improved methodology
Autorzy:: Yan, Y.
Bohn, M.
Powiązania:: https://bibliotekanauki.pl/articles/99701.pdf
Data publikacji:: 2017
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: geometrical product specifications
part alignment
datum
Opis:: According to the ISO Geometrical Product Specifications (GPS), centred part alignment with one centred point can be described clearly using technical drawings. There are two main limitations of this standard; Firstly: the uncertainty over use of notations in technical drawings when more than one centred point is applied, and secondly, the use of fixed datum targets to centred points which causes an unstable alignment process. This article suggests a new approach for a functional, explicitly defined notation system of datums and datum systems based on the research of orientation constraints between datums. This new approach simplifies the technical drawing, thereby eliminating notation uncertainties. An improved methodology for a stable alignment process was developed based on physical analysis of the centred part alignment which implements movable datum targets.
Źródło:: Journal of Machine Engineering; 2017, 17, 2; 90-101
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Elements of Software Integration of Production Systems in Industrial Product Control and Didactics
Autorzy:: Nieciąg, H.
Dudek, P.
Powiązania:: https://bibliotekanauki.pl/articles/99853.pdf
Data publikacji:: 2013
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: part inspection
coordinate instruments
optical scanner
Opis:: The article presents the method that is used to educate students pursuing a course in Machine Design Technology. The implementation of contactless measurement technology, which is becoming increasingly popular in industrial product control, was described. The sample part subjected to dimensional control was the fastening block of a 3R system electrode. Dimensional control in order to map some geometrical features of the part was conducted on a station equipped with a coordinate measuring arm and included contact-free verification of exterior dimensions.
Źródło:: Journal of Machine Engineering; 2013, 13, 4; 18-34
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Process - machine tool thermal interaction
Autorzy:: Jedrzejewski, J.
Grzesik, W.
Kwasny, W.
Modrzycki, W.
Powiązania:: https://bibliotekanauki.pl/articles/1429322.pdf
Data publikacji:: 2008
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
cutting process device
part
interaction
Opis:: Hereby paper shows the structure of mutually connected thermal interactions in a machine tool, a tool and a workpiece, which finally leave their traces on a machined workpiece in form of machining errors. Thermal interactions of a machine tool and the environment on own and workpiece errors were discussed. Thermal interaction cases were considered, connected with the varying environment and the main drive operation, as well as total influence of the varying environment, main drive and two drives of controllable axes. The interactions of the cutting process itself were discussed, assuming three basic mechanisms: thermal, physically-mechanical and tribological. On the example of turning it was proven that the character of changes in total influences between the tool and workpiece has the shape of a temperature curve.
Źródło:: Journal of Machine Engineering; 2008, 8, 3; 91-106
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Influence of different machining processes on fatigue life performance of engineered surfaces: a short review
Autorzy:: Grzesik, Wit
Powiązania:: https://bibliotekanauki.pl/articles/2086274.pdf
Data publikacji:: 2022
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: engineered part
surface roughness
stress concentration
fatigue life
Opis:: In this paper fundamental information on the influence of the real machined surfaces generated by different machining processes on the fatigue life of machine parts are presented. In the first part the various approaches for the assessment of the stress concentration factor and the correction of a fatigue life limit are discussed. In the second part the results of standard fatigue tests are compared with computed data and predictions using FEM based simulations. The effect of surface discontinues (valleys) in the real surface profiles is related to engineered parts made of different materials including steels, aluminium alloys, aerospace alloys and composites.
Źródło:: Journal of Machine Engineering; 2022, 22, 2; 18--30
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: A novel method for additive manufacturing of complex shape curved parts by using variable height layers
Autorzy:: Rauch, Matthieu
Dorado, Jorge Piedra
Hascoet, Jean-Yves
Ruckert, Guillaume
Powiązania:: https://bibliotekanauki.pl/articles/1833771.pdf
Data publikacji:: 2021
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: WAAM
additive manufacturing
variable height layer
curved part
Opis:: The Wire Arc Additive Manufacturing process (WAAM) is designed for the manufacture of large metallic parts with no joints, very little waste material and hardly any support. It is gaining its space inside the naval, aeronautics and space industries. However, there are key challenges to be solved in order to increase the performance of the WAAM process. Parts with curved shapes are difficult to manufacture with regular parallel layers without support because of an excessive overhang in certain regions. This paper proposes a methodology that solves this issue, by using incrementally angled layers with variable bead height, which eliminates or decreases the overhang between layers. This solution uses an angled rotary positioner (or other method for moving the part in a controlled way) and controls key parameters like the travel speed, the deposition angle, the available bead height difference, etc. The efficiency of the developed proposal is shown with the manufacture of a large curved steel (316L) piece as a use-case.
Źródło:: Journal of Machine Engineering; 2021, 21, 3; 80--91
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Decomposition algorithm for tool path planning for wire-arc additive manufacturing
Autorzy:: Nguyen, L.
Buhl, J.
Bambach, M.
Powiązania:: https://bibliotekanauki.pl/articles/99900.pdf
Data publikacji:: 2018
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: additive manufacturing
part decomposition
multi-direction slicing
WAAM
Opis:: Three-axis machines are limited in the production of geometrical features in powder-bed additive manufacturing processes. In case of overhangs, support material has to be added due to the nature of the process, which causes some disadvantages. Robot-based wire-arc additive manufacturing (WAAM) is able to fabricate overhangs without adding support material. Hence, build time, waste of material, and post-processing might be reduced considerably. In order to make full use of multi-axis advantages, slicing strategies are needed. To this end, the CAD (computer-aided design) model of the part to be built is first partitioned into sub-parts, and for each sub-part, an individual build direction is identified. Path planning for these sub-parts by slicing then enables to produce the parts. This study presents a heuristic method to deal with the decomposition of CAD models and build direction identification for sub-entities. The geometric data of two adjacent slices are analyzed to construct centroidal axes. These centroidal axes are used to navigate the slicing and building processes. A case study and experiments are presented to exemplify the algorithm.
Źródło:: Journal of Machine Engineering; 2018, 18, 1; 95-106
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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