scholarly journals Comparison of Additive Technologies for Gradient Aerospace Part Fabrication from Nickel-Based Superalloys

Superalloys ◽  
10.5772/61121 ◽  
2015 ◽  
Author(s):  
Igor V. Shishkovsky ◽  
Aleksey P. Nazarov ◽  
Dmitry V. Kotoban ◽  
Nina G. Kakovkina
Keyword(s):  
Additive Technologies

EXTRUDABLE UHMWPE-BASED COMPOSITES: PROSPECTS OF APPLICATION IN ADDITIVE TECHNOLOGIES

2017 ◽  
Vol 8 (2) ◽  
pp. 85-94 ◽  
Author(s):  
S. V. Panin ◽  
L. A. Kornienko ◽  
V. O. Aleksenko ◽  
L. R. Ivanova ◽  
S. V. Shil’ko ◽  
...  
Keyword(s):  
Additive Technologies ◽  
Prospects Of Application

Application of additive technologies in manufacture of machine parts

2018 ◽  
Vol 11 ◽  
pp. 136-144
Author(s):  
Haba Etienne ◽  
◽  
V.A. Timiryazev ◽  
Keyword(s):  
Additive Technologies ◽  
Machine Parts

scholarly journals Porosity Analysis of Additive Manufactured Parts Using CAQ Technology

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1142
Author(s):  
Peter Pokorný ◽  
Štefan Václav ◽  
Jana Petru ◽  
Michaela Kritikos
Keyword(s):  
Manufacturing Process ◽  
Scanning Speed ◽  
Additive Technologies ◽  
Integration Time ◽  
Detector Resolution ◽  
Porosity Analysis ◽  
3D Scans ◽  
Printing Direction ◽  
Non Destructive

Components produced by additive technology are implemented in various spheres of industry, such as automotive or aerospace. This manufacturing process can lead to making highly optimized parts. There is not enough information about the quality of the parts produced by additive technologies, especially those made from metal powder. The research in this article deals with the porosity of components produced by additive technologies. The components used for the research were manufactured by the selective laser melting (SLM) method. The shape of these components is the same as the shape used for the tensile test. The investigated parts were printed with orientation in two directions, Z and XZ with respect to the machine platform. The printing strategy was “stripe”. The material used for printing of the parts was SS 316L-0407. The printing parameters were laser power of 200 W, scanning speed of 650 mm/s, and the thickness of the layer was 50 µm. A non-destructive method was used for the components’ porosity evaluation. The scanning was performed by CT machine METROTOM 1500. The radiation parameters used for getting 3D scans were voltage 180 kV, current 900 µA, detector resolution 1024 × 1024 px, voxel size 119.43 µm, number of projections 1050, and integration time 2000 ms. This entire measurement process responds to the computer aided quality (CAQ) technology. VG studio MAX 3.0 software was used to evaluate the obtained data. The porosity of the parts with Z and XZ orientation was also evaluated for parts’ thicknesses of 1, 2, and 3 mm, respectively. It has been proven by this experimental investigation that the printing direction of the part in the additive manufacturing process under question affects its porosity.

DYNAMIC MODEL OF COMBINED AGGREGATION OF ADDITIVE MANUFACTURING PROCESS

2021 ◽  
Author(s):  
A. V. Vinnichenko ◽  
Keyword(s):  
Mathematical Modeling ◽  
Additive Manufacturing ◽  
Process Model ◽  
Additive Technologies ◽  
Additive Models ◽  
Small Scale ◽  
Scale Production ◽  
Flexible Production ◽  
Optimization Criteria ◽  
Production Resources

The paper presents methods and approaches for mathematical modeling and rationalization of flexible additive manufacturing, as well as other processes by which it is possible to create additive models for their integration into the system of experimental or pilot production. The work has also formed and synthesized a process model, which includes flexible production indicators, service indicators, and a developed criterion base for their assessment. The work takes into account the optimization criteria, as well as maximizing and minimizing risks for additive manufacturing, taking into account the possible risk component when deploying new processes for experimental and small-scale production. The models and methods described in the article will make it possible to carry out mathematical modeling and subsequent improvements for the flexible production process using additive technologies, used as a means of achieving the rational use of existing production resources within the framework of existing scientific and production complexes.

SURFACE ROUGHNESS IMPROVEMENT OF PARTS MADE OF POLYMERIC MATERIALS OBTAINED BY MEANS OF ADDITIVE TECHNOLOGIES

2021 ◽  
Vol 2021 (7) ◽  
pp. 12-18
Author(s):  
Mikhail Kulikov ◽  
Maksim Larionov ◽  
Denis Gusev ◽  
Evgeniy Shevchuk
Keyword(s):  
Surface Quality ◽  
Polymeric Materials ◽  
Additive Technologies ◽  
Abrasive Tool ◽  
Technological Basis ◽  
Dry Processing ◽  
Investigation Methods ◽  
Before And After ◽  
Part Surface ◽  
Surface Layer Quality

In the paper there is under consideration an effort to achieve the roughness index of Ra <0.8 with the aid of soft abrasive tool use. As a result the purpose of this work became development of the technology for surface quality improvement of parts manufactured with the aid of additive technologies. The authors carried out a number of experiments with the samples manufactured with the aid of the method of FDM print. With the aid of 3D Ultra 3 printer of EnvisionTec company. The samples were made of ABS-plastic in the amount of 6 pieces. On each sample there were defects after printing which contributed to the deterioration of surface quality in products. By means of TR220 profilometer there was measured roughness before and after the experiment. There was carried out dry processing and with the use of SCL. As a result, dry processing resulted in worsening surface quality, heavy wear of an abrasive tool and grain contamination. Analyzing the data obtained from the profilometer in the experiment and SCL use a considerable improvement of the surface layer quality at minimum allowance is observed. Investigation methods: in the work basis there are experimental methods of investigation. The investigations are carried out with the use of a microscope and profilometer. Processing investigation results was carried out as a result of the comparison of the measuring data obtained. Work Novelty: there are defined conditions of soft abrasive tool operation and SCL impact upon Ra indices. The results obtained indicate a possibility of Ra improvement on a part surface which is achieved due to a combined shaping with the aid of additive technologies and further machining carried out on a single technological basis. The experience without SCL use has shown the overheating possibility the result of which is a meltback and plastic sticking both on the surface, and on abrasive grains of the cutter which is inadmissible and results in considerable worsening of Ra on the surface machined and cutter wear. In view of this the SCL use in finishing is promising, but to achieve better results SCL chemistry must be improved.

DETERMINATION OF TECHNOLOGICAL PARAMETERS OF CULINARY PRODUCTS PRODUCTION USING MIXTURES AND EMULSIONS FOR ADDITIVE TECHNOLOGIES

2020 ◽  
pp. 189-198
Author(s):  
A. Meliaschenya ◽  
I. Kaltovich ◽  
G. Pinchuk
Keyword(s):  
Broiler Chicken ◽  
Raw Materials ◽  
Chicken Meat ◽  
Additive Technologies ◽  
Technological Parameters ◽  
Optimal Length ◽  
Layer Width ◽  
Degree Of Hydration ◽  
Rational Sequence

The article presents the results of research on the determination of rational technological parameters for the production of culinary products using dry mixtures and emulsions based on animal raw materials for additive technologies. It was found that when making products using mixtures and emulsions based on broiler chicken meat, as well as a combination of broiler chicken meat and pork, pork and beef (ratio 1:1) rational height of the layer, which makes it possible to ensure stability and safety of the product shape (with a fixed diameter of the opening of the culinary syringe – 7 mm and the optimal length of the layer - 100 mm), is from 14–21 mm (with a layer width of 7 mm) and up to 133–154 mm (with a layer width of 98 mm), which allows for improved structural and mechanical (SSL – 1090.7–1099.9 Pa) and functional and technological indicators of these products (WHC – 92.7–97.5%). The rational sequence of application and the duration of chopping of the main and auxiliary raw materials for the manufacture of emulsions, the duration of preparation (3 minutes), the degree of hydration (1:2 – 1:3) and the temperature of water for the reduction of dry mixtures (60±1° C) were established, which made it possible to develop technological schemes for the production of culinary products using additive technologies.

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