No abstract

The manufacture of stamp-welded and porous elements of porous-net material (PNM) from stainless steel 12H18N10T (0,12% C, 18% Cr, 10% Ni, 1% Ti) is difficult due to the low ductility under tension and the lack of weldability. It limits the use of PNM, although the fact that they may have the necessary technological and operational properties. The effect of porosity and heat conductivity anisotropy on the strength of welded splices of parts made of PNM have been established. Technologies of electron-beam welding (EBW) and sheet stamping of filter elements, which are implemented during the manufacture of prototypes of filter elements with a cleaning precision 10-12 microns, are presented.

The article is devoted to determining the number of deposited layers by the method of electric arc welding using a ferromagnetic charge in the case of eliminating wear on the cam of the drive wheel of the EKG–5A excavator from 35KhML steel. As well as assessing the distribution of hardness and the presence of defects along the layer height during sequential cooling of the deposited rollers and in the absence of cooling before by applying a subsequent roll in multilayer surfacing.

The article presents the study of the application of 3D printing technology for rapid tooling in sheet metal forming for custom or small–lot manufacturing. The main issue of the usage of 3D printing technology for die tooling was discovered. It is proposed to use the method of mathematical modelling to investigate how the printing parameters affect the compressive strength of FDM 3D–printed parts. Using expert research methods, the printing parameters most strongly affecting the strength of products were identified for further experiments. A method for testing the strength of 3D–printed materials has been developed and tested.

There was developed a technology to enhance the resilience of large dies and punches. Maximum contact load on the exhaust side of the punch die was measured. The experimental research of non-abrasive finishing antifriction coatings wear resistance was carried out taking into account the influence of lubricants.