Design and Development of a Numerical Model and Study on Kinematic Analysis of a Circular Diamond Saw Blade for Ceramics

Diamond tools are currently being used by an increasing number of architects, miners and construction engineers because they are faster and easier to use than older, more traditional instruments like sledge hammers and pneumatic and hydraulic jacks. Bridge and highway surfaces are cut with diamond asphalt and concrete cutting machines to provide for quick, clean, and easy section removal and replacement. The entire cost is reduced since diamond tools take less time and manpower The experiment is carried out to validate the performance of diamond saw blades by taking into consideration characteristics such as normal force, tangential force, cutting speed, cut depth, and peripheral velocity. In present exploration work we are introductory phase of plan conclusion of a jewel device cutting edge with various segmental like 8,12,16,20 corn meal by utilizing Solid works programming we are planning the apparatus cutting edge after that we are imported in Ansys Software for Analysis reason. Computing the necessary qualities for examination and estimations of earthenware tiles likewise are some other stone molecule. Another power model of cutting is presented and inferred numerical demonstrating for chip thickness. Identical chip thickness to coarseness space proportion is gotten from the new power model another outspread opening like profile is presented. Fragmented sort jewel saw sharp edge with the measurement of 400 mm and different portion, for example, 8, 12, 16 and 20 are planned in Solid works effectively. An examination study between existing roundabout outspread space and cone like opening is done to decide deformity, stress dispersion, vibration and temperature conveyance.

The Influence of Ni-Added Fe-Based Pre-Alloy on Microstructure Evolution and Lifetime Extension of Diamond Tools

Diamond tools were prepared by sintering Fe-Cu-Sn-Zn-Ni pre-alloyed powders and diamonds. The effects of Ni contents in pre-alloyed powders on microstructure evolution of Fe-based matrix, the properties of Fe-based matrix and the service life of diamond tools were investigated. The results showed that adding 3~15 wt.% Ni into the Fe-Cu-Sn-Zn pre-alloyed powders refined the microstructure of the Fe-based matrix and improved its density and hardness gradually. The addition of Ni reduced the loss of low melting liquid phase at a low sintered temperature, thus resulting in a decrease of the pores, an increase of the density and hardness of Fe-based matrix. When the Ni content is less than 9 wt.%, the bending strength of Fe-based matrix and diamond tools, together with the holding force of Fe-based matrix to diamonds increases sharply. They reached up to the optimal value with the Ni content of 9 wt.%. At this sintering powder ratio, the sufficient Fe-Cu-Sn-Zn-Ni liquid phase had a good wettability on the surface of diamonds, thus the optimal performance of sintered matrix and diamond tools was obtained. The service life of diamond tools was prolonged greatly owing to the excellent bonding capacity between matrix and diamonds. Once the Ni content exceeded 9 wt.%, the corresponding value decreased gradually. The fracture morphologies of the matrix changed from the brittle fracture into brittle-ductile fracture, then ductile fracture (with the Ni content of 9 wt.%), brittle-ductile mixed fracture and brittle fracture.

Diamond tool wear monitoring by sensory analysis in milling of absolute black granite

Diamond tools suitable for machining operations of natural stones can be divided into two groups: cutting tools, including blades, the circular blades and the wires, and the surface machining ones, involving mills and grinders, that can be of different shapes. For the stone sawing process, the most adopted tool type is the diamond mill, whose duration and performance are influenced by various elements such as: the mineralogical characteristics of the material to be machined; the working conditions such as the depth of cut, the feed rate and the spindle speed; the production process of the diamond segment and the characteristics of both the matrix and the diamond, such as the size, the type and the concentration of the diamonds and the metal bond formulation hardness. This work allows to indirectly assess the wear of sintered diamond tools by signal analysis (in time and frequency domain) of the cutting force components acquired in the process. The results obtained represent a fundamental step for the development of a sensory supervision system capable of assessing the tool wear and hence to modify the process parameters in process, in order to optimize cutting performance and tool life.

Evaluation of Wear Behaviour in Metallic Binders Employed in Diamond Tools for Cutting Stone

A type of disc-on-plate test methodology was used to determine the wear behavior of metallic binders employed in the manufacturing of diamond impregnated tools. The disc consists of a special circular wheel that allows the binder materials alone (i.e., without diamond, but sintered under conditions identical to those of the complete tool) to be tested against a plate of stone material under pre-determined testing conditions. The testing conditions are intended to be equivalent to those used in the industrial processes. Using plates of five types of granite and one type of marble, this work comprises wear tests of 15 different types of metallic binders and two sintering modes conducted under, at least, three different values of contact-force. The analysis of the results demonstrated that the wear of the binders can be related to their mechanical properties through an empirical expression. The larger the difference between the characteristics of the tribological pair (binder versus stone), the higher is the correlation between the experimental wear data and the values given by the empirical expression. The relationships presented in this work allow predicting the wear behavior of the binder, and therefore may help in the design process of diamond tools. There was a clear difference between the wear behavior of metallic binders when they were employed against the two main classes of stone under analysis (marble and granite).

EVALUATION OF THE MICROSTRUCTURE OF ZIRCONIUM DIOXIDE DURING ITS PROCESSING WITH VARIOUS TYPES OF DIAMOND TOOLS FOR FIXED PROSTHETICS IN DENTISTRY

Цель: определить характер механического воздействия на структуру образцов из керамики на основе диоксида циркония при её обработке различными алмазными инструментами, и оценка пригодности инструмента с различным способом фиксации абразива при многократном применении для дальнейшего использования. Материал и методы. Материал исследования - образцы на основе метастабильного тетрагонального диоксида циркония, изготовленные в зуботехнической лаборатории и стандартизированные по толщине (1 мм). Оценку влияния механических напряжений на структуру и свойства исходного материала проводили методом перфорации образца алмазными борами, содержащими специальный абразив для обработки циркония. Исследовались боры с различным типом фиксации абразива: № 1 - алмазный бор c синтетическим абразивом, закрепленным по типу ERA; №2 - алмазный бор с композитной фиксацией абразива импортного производства; №3 - отечественный алмазный бор с нанесением и фиксацией абразива методом гальванопластики. Методом сканирующей электронной микроскопии получали изображения результатов механического воздействия боров на образцы диоксида циркония при однократном и пятикратном использовании бора. Исследование структуру самого алмазного инструмента на предмет его пригодности для дальнейшего использования. Результаты. При однократном применении все представленные боры сохраняют микроструктуру диоксида циркония, что позволяет в дальнейшем работать с образцами с использованием адгезивной техники. При пятой обработке боры № 3 не пригодными для работы с керамическим образцом, боры № 2 остаются частично пригодными, боры №1 сохраняют свою пригодность для дальнейшего использования. Заключение. Керамические образцы на основе на основе диоксида циркония изменяются в процессе механического воздействия, что зависит от вида применяемого бора и кратности его применения. Боры с синтетическим алмазным абразивом на базе ERA остаются работоспособными даже после их пятикратного применения, боры с композитной фиксацией абразива к пятому применению остаются относительно работоспособными, а боры с гальванопластической фиксацией абразива к пятому применению приходят в полную негодность Purpose: to determine the nature of the mechanical impact on the structure of samples made of ceramides based on zirconium dioxide when it is processed with various diamond tools, and to assess the suitability of tools with different methods of fixing the abrasive with multiple applications for further use. Material and methods. The material of the study is samples based on metastable tetragonal zirconium dioxide manufactured in a dental laboratory and standardized in thickness (1 mm). The influence of mechanical stresses on the structure and properties of the source material was evaluated by perforating the sample with diamond bores containing a special abrasive for processing zirconium. Bores with different types of abrasive fixation were studied: № 1-diamond boron with synthetic abrasive fixed by ERA type; № 2-diamond boron with composite fixing of imported abrasive; № 3 - edematous diamond boron with applying and fixing the abrasive by electroplating. Scanning electron microscopy was used to obtain images of the results of mechanical action of boron on samples of zirconium dioxide with a single and five-fold use of boron. Investigation of the structure of the diamond tool itself for its suitability for further use. Results. With a single application, all the presented burs preserve the microstructure of the samples, which makes it possible to preserve the suitability of the sample for further work using adhesive technology. At the fifth processing, boron № 3 is not suitable for working with a ceramic sample, boron № 2 remains partially suitable, boron № 1 retains its suitability for further use. Conclusion. Ceramic samples based on zirconium dioxide change in the process of mechanical action, which depends on the type of boron used and the multiplicity of its application. Bores with synthetic diamond abrasives based on ERA remain workable even after their five-time application, bores with composite Abrasive fixation remain relatively workable by the fifth application, and bores with electro plastic fixation of the abrasive by the fifth application become completely unusable