Possibilities of Development in the Single-Pass Internal Cylindrical Grinding

2008 ◽  
Author(s):  
Krzysztof Nadolny ◽  
Jaroslaw Plichta
Keyword(s):  
Cylindrical Grinding ◽  
Single Pass ◽  
Internal Cylindrical Grinding

scholarly journals The Effects of Wear upon the Axial Profile of a Grinding Wheel in the Construction of Innovative Grinding Wheels for Internal Cylindrical Grinding

2011 ◽  
Vol 2011 ◽  
pp. 1-11 ◽  
Author(s):  
K. Nadolny ◽  
B. Słowiński
Keyword(s):  
Removal Rate ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Cylindrical Grinding ◽  
Single Pass ◽  
Grinding Processes ◽  
Sintered Corundum ◽  
Internal Cylindrical Grinding ◽  
Axial Profile ◽  
Grinding Power

The article describes the effects of wear upon the axial profile of a grinding wheel in the axial cylindrical grinding processes. This mechanism was used to develop a grinding wheel with zone diversified structure made of microcrystalline sintered corundum abrasive grains and vitrifies bond. Such a grinding wheel is characterized by the conical rough grinding zone that is made by grains of a relatively large size, and a cylindrical finish grinding zone with grains of a smaller size and can be used in the single-pass grinding processes. Investigative tests conducted using newly-developed grinding wheels were described. Investigations were operated in the single-pass internal cylindrical grinding process of 100Cr6 steel. A comparison of results obtained using a zone diversified structure grinding wheel, with reference to a grinding wheel with grains of one size, were given. The analysis provides the roughness of the grinded surface, the grinding power, as well as chosen indicators of grinding efficiency. Experimental results obtained with use of a zone-diversified grinding wheel, built from relatively cheap grains of microcrystalline sintered corundum, showed that it is possible to obtain large material removal rate up to approximately 24 mm3/s and high quality of machined surface ( μm).

scholarly journals Simulation Studies on Centrifugal MQL-CCA Method of Applying Coolant during Internal Cylindrical Grinding Process

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2506
Author(s):  
Seweryn Kieraś ◽  
Marek Jakubowski ◽  
Krzysztof Nadolny
Keyword(s):  
Coolant Flow ◽  
Grinding Wheel ◽  
Geometrical Parameters ◽  
Grinding Process ◽  
Simulation Studies ◽  
Cylindrical Grinding ◽  
Supply Line ◽  
Air Gun ◽  
Internal Cylindrical Grinding ◽  
Cooling And Lubrication

This paper describes simulation studies regarding the application of the centrifugal minimum quantity lubrication (MQL) method simultaneously with the delivery of a compressed cooled air (CCA) stream in the internal cylindrical grinding process. The idea of a new hybrid cooling and lubrication method connecting centrifugal (through a grinding wheel) lubrication by MQL with a CCA stream is described. The methodology of computational fluid dynamics (CFD) simulation studies, as well as the results of numerical simulations, are presented in detail. The aim of the simulations was to determine the most favourable geometrical and kinematic parameters of the system in the context of air-oil aerosol and CCA flow, as well as heat exchange. In the simulation, the variables were the grinding arbor geometrical parameters, the angle of CCA supply line outlets, and the grinding wheel and workpiece peripheral speed. As a result of the simulation studies, the most favourable geometrical parameters were designated, determining the orientation of the ends of the two CCA supply line outlets before and after the grinding zone, the number of openings in the drilled-out grinding arbor, and the influence of the grinding speed on the parameters of the coolant flow and temperature of objects in the grinding zone. In addition, the results of simulation tests made it possible to visualise the velocity vectors of the two-phase coolant flow in a complex system of air-oil aerosol delivery centrifugally through an open structure of a very fast rotating porous layer (grinding wheel), with an additional supply of CCA using an external cold air gun (CAG).

scholarly journals Rancang Bangun Universal Silindrical Grinding Attachment Sistem Modul pada Mesin Bubut Manual

2018 ◽  
Vol 3 (1) ◽  
pp. 41-47
Author(s):  
Sutopo Sutopo ◽  
Paryanto Paryanto ◽  
Aan Ardian ◽  
Arif Marwanto
Keyword(s):  
Quantitative Research ◽  
Cylindrical Grinding ◽  
Internal Cylindrical Grinding ◽  
Quantitative Descriptive ◽  
Grinding Machine ◽  
Strongly Agree ◽  
D Model

The purpose of this research is to design and to analyze the feasibility of universal cylindrical grinding attachment that can be attached to conventional lathes. The research is a quantitative research using ADDIE Reseach and Development (R&D) procedure. Data were collected using observation, by means of questionnaire and documentation. Data were analyzed using quantitative-descriptive technique. Results are: (1) the universal cylindrical grinding attachment design is a modified hand-grinding machine with added components to add internal cylindrical grinding functionality; (2) all aspects are in the category of “strongly agree”, so it can be concluded that the design is feasible to use.Tujuan penelitian ini adalah untuk merancang mesin universal cylindrical grinding attachment yang dapat dipasang dan digunakan pada mesin bubut konvensional serta untuk mengetahui kelayakannya. Penelitian ini menggunakan pendekatan penelitian kuantitatif dengan prosedur penelitian Pengembangan/Reseach and Development (R&D) model ADDIE. Pengumpulan data menggunakan teknik observasi dan alat pengumpul data menggunakan angket dan dokumentasi. Analisis data menggunakan teknik deskriptif kuantitatif. Hasil penelitian ini adalah: (1) Rancangan mesin universal cylindrical grinding attachment pada mesin bubut manual dibuat dengan memodifikasi mesin gerinda tangan dengan dengan menambahkan beberapa komponen, yaitu: tapper shaft, clamping nuts, slive, shank, nut, bottom holder, dan top holder, sehingga fungsinya bertambah yaitu mampu digunakan untuk menggerinda internal silindris.; (2) rentang penilaian rerata keseluruhan aspek  termasuk dalam kategori sangat setuju, sehingga dapat disimpulkan bahwa mesin ini layak untuk digunakan.

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