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.
The investigation results of metal surface processing before industrial painting or protective coat application are shown. A pre-coloring processing defines quality of the coating applied, its adhesion with basic metal, uniformity and strength. The processes of surface roughness formation depending on processing modes and properties of the abrasive used are considered thoroughly.
On this account the purpose of this work became quality parameter support of products obtained with the aid of 3D-printing. By the authors there was carried out a series of investigations on samples manufactured on the Ultra 3 3D-printer of the Envision Tec. Company. The samples were manufactured in batches of seven samples in each. Each sample from the batch varied from each other with the growth angle α between the researched surface and a “contact window”, and also the thickness of the layer z. With the aid of the profile meter TR110 there was measured roughness and for a thorough analysis of roughness step dimensions there was used a probe microscope of SolverPro company operating in the mode of atomic-power microscopy. The data analysis helped to draw a conclusion on the nature of roughness formation at prototyping, and digital data obtained were accumulated in a table and with the aid of statistical processing there was deduced an equation of the roughness parameter dependence of the surface Ra upon initial technological parameters of the prototyping process. But further roughness improvement can be achieved with the combined shaping with the aid of additive technologies and further machining carried out on a single platform. Investigation methods: at the heart of the work underlie experimental methods of investigation. The investigations are carried out with the use of modern means of nondestructive control; with the use of methods of probe microscopy and standard methods of roughness measurement with the use of a profile meter. The processing of investigation results is carried out with the use of modern mathematical apparatus. Work novelty: there is defined the nature of roughness formation on the surface of a product manufactured with the aid of additive technologies at technological parameter variation of prototyping.
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