Experimental studies using minimum quantity cooling (MQC) with molybdenum disulfide and graphite-based microfluids in grinding of Inconel® alloy 718

In the paper, the results of experimental studies related with determination of the influence of the supply of a grinding fluid (GF) doped with powdered graphite and MoS2 into the machining zone with the minimum quantity cooling (MQC) method on the course and results of the reciprocating internal cylindrical grinding of rings made from Inconel® alloy 718 have been presented. As a grinding fluid, water aerosols were used. The aerosols delivered the following into the grinding zone: water slurry MoS2 with a concentration of 30 g/dm3, water slurry of graphite with a concentration of 30 g/dm3, 5% water solution of Syntilo RHS oil and pure demineralized water. The obtained results of carried out experiments showed that the most favorable conditions of grinding wheel operation were obtained when MQC-based delivering an aerosol of water slurry made from demineralized water doped with MoS2 and graphite with a minimum flow rate and when delivering an aerosol of 5% water slurry of Syntilo RHS oil. It was proved that doping GF with powdered MoS2 and graphite, with delivery in the form of an aerosol with a minimum flow rate, has a substantial influence on the intensity of clogging grinding wheel active surface (GWAS). Additionally, it has been demonstrated that the solid grease MoS2 and graphite particles reached the area of contact of the GWAS and the machined surface effectively, actively influencing its tribological conditions of the grinding process.Web of Science1011-466163

Characterization of Magnetoelectropolished Stainless Steel Surfaces’ Texture by Using the Angle-Resolved Scattering and Image Processing Analysis Methods

In this article, the results of preliminary experimental studies related to a fast, non-contact assessment of the AISI 316L stainless austenitic steel surfaces after electrochemical polishing in a magnetic field have been presented. The experiments were realized with the use of a modified angle-resolved scattering (ARS) method based on the analysis of angular distribution of the scattered light intensity. Digital images of such distribution were acquired for selected areas of examined samples—base surface and surface after magnetoelectropolishing (MEP) process. Parametric analysis oriented toward the calculation of selected key geo- and photometric parameters carried out in Image Pro®-Plus software allowed for characterization of the surface conditions of the assessed samples in terms of their scattering properties. The obtained experimental results confirmed the usefulness of the ARS method used in the presented studies as well as the possibility of its practical use (after appropriate modifications) on a wider scale, especially in industrial applications

Experimental Studies on MoS2-Treated Grinding Wheel Active Surface Condition after High-Efficiency Internal Cylindrical Grinding Process of INCONEL® Alloy 718

This work demonstrates that molybdenum disulfide can be successfully used as an impregnating substance that is introduced in the abrasive tool structure for improving its cutting properties and favorably affecting the effects of the abrasive process. For the experimental studies, a set of MoS2-treated small-sized grinding wheels with a technical designation 1-35×10×10×109A5X60L10VE0 PI-50 before and after the reciprocating internal cylindrical grinding process of rings made from INCONEL® alloy 718 was prepared. The condition of grinding wheel active surface was analyzed using an advanced observation measurement system based on stylus/optical profilometry, as well as confocal and electron microscopy. The obtained results confirmed the correctness of introduction of the impregnating substance into the grinding wheel structure, and it was possible to obtain an abrasive tool with a given characteristic

Shaping and Geometrical Analysis of the Ring-type Test Samples Used in Dimensional Measurements by a Bench-Type Multisensor CMM

The routine measurements of various geometrical quantities in industrial applications are realized by use of a range of optical methods. Optical metrology is a dynamically developing area of the modern science and technology using a hardware solution from simple sensors to advanced computer-controlled measurement systems. In many specific applications dedicated measurement systems are required, which are characterized by much better metrological parameters and wider measuring capabilities than typical systems. Testing of such systems must be carried out on objects with similar properties as the actual objects produced in industrial conditions. The hybrid system for non-contact simultaneous assessment of the surface texture and dimension developed in Koszalin University of Technology (Koszalin, Poland) specially produced sets of ring-type samples with a variable external diameter φz=20.5-30±0.2 mm. This paper presents theprogress of works related to the design, production and analysis of the geometrical dimensions of such sets of test samples prepared for dimensional assessment by using laser triangulation methods. All the stages of this work are all so described and detailed in this paper. These stages included: the determination of assumptions for the preparation of samples, the choosing and characterising of the materials used for samples, the machiningwith a specialized bench-type lathe SK-1, as well as the dimensional measurements used by simple hand measuring instruments and the advanced bench-type coordinate measuring machine Video-Check®-IP 250 produced by Werth Messtechnik GmbH. The results obtained, which were presented in the form of bar diagrams and detailing already discussed, confirmed the dimensional correctness of the machining that was carried out

Effects of sulfurization of grinding wheels on internal cylindrical grinding of Titanium Grade 2^®

108-124This paper presents an assessment of the influence exerted upon the internal cylindrical grinding of Titanium Grade 2® by the sulfurization of grinding wheels with ceramic bond. The sulfurization method of ceramic grinding wheels is presented against the background of a&nbsp;chemical basis for abrasive machining. The experimental investigation methodology is described. It includes a&nbsp;presentation of the proposed method for comparison of the sulfurization influence on the grinding results, which consists in performing a short grinding test in the plunge grinding kinematics. The paper emphasizes the multicriterial analysis of the experimental test results. It also describes the condition of the grinding wheel active surface (GWAS) that has not been sulfurized and one that has been impregnated with sulfur after grinding of the Titanium Grade 2®. The assessment has been carried out on the basis of the acquired SEM micrographs, as well as measurements of the surface microtopography with an optical profilometer and laser scatterometry method. The paper also analyzes the workpiece surface roughness measured with the stylus profilometry method, as well as the elemental composition of the surface inclusions, using Energy Dispersive X-ray Spectroscopy (EDS). The experimental results show that impregnation with sulfur makes it possible to significantly limit the phenomenon of smearing the GWAS with the machined material. </span

Laser measurements of surface topography of abrasive tools using measurement system CLI 2000

W pracy zaproponowano wykorzystanie systemu pomiarowego Talysurf CLI 2000 firmy Taylor-Hobson Ltd,. do oceny topografii powierzchni narzędzi ściernych. Przedstawiono krótką charakterystykę urządzenia oraz pokazano przykładowe wyniki pomiarów powierzchni, wykonywanych metodą triangulacji laserowej. Rezultaty badań potwierdziły dużą użyteczność zastosowanego systemu pomiarowego oraz jego szerokie możliwości oceny tego typu powierzchni.In the paper using of advanced measurement system Talysurf CLI 2000 produced by Taylor-Hobson Ltd., for assessment of surface topography of abrasive tools was proposed and discussed. The characteristics of system and exemplary results of obtained surface topography was presented additionally. Results of experimental investigations confirmed the usefulness of the measuring system for assessing of these type of surfaces.(Laser measurements of surface topography of abrasive tools using measurement system CLI 2000).Web of Science879a272