Calculations of the Relative Reference Area of the Cylindrical Surfaces of the Parts of the Printing Equipment with the Combined Strengthening of the Vibration Rolling
| Jazyk: | angličtina |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Технологія і техніка друкарства, Vol 0, Iss 3(61) (2018) |
| ISSN: | 2414-9977 2077-7264 |
| Popis: | Experimental researches on strengthening the surface of the steel shafts of printing equipment allowed us to establish the dependence of the geometric parameters of the microrelief of the surface on the technological parameters of the vibration process. The complex two-stage process of strengthening finishing, consisting of two consecutive operations of formation of a microrelief by a method of vibro-rolling, is offered. It is proved that at optimal parameters of the proposed complex technological process of strengthening the wear resistance of shafts working under friction increases by 45–55 % compared to untreated surfaces. This greatly affects the quality of the final printing product. The possibility of increasing the microhardness of near-surface layers after a complex finishing-strengthening treatment by the method of ion nitriding in a helicon discharge without changing the micro-geometry of the surface has been revealed. The proposed technology will approximately increase the durability by 18–23 % compared with the complex technology. At the same time, the high density of plasma of heliconic discharge and a wide range of regulation of technological parameters of nitriding reduce the time of a single technological process by more than 10 times compared with the currently known methods of nitriding. We have established analytical dependence between the geometric parameters of elements of a microrelief, the radius of the sphere of the deforming element and the relative reference surface of the surface after the combined two-stage hardening processing with plastic deformation. This allows, through the regulation of parameters, to predict the effect on the quality of the surfaces, depending on their operational properties. |
| Databáze: | OpenAIRE |
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