Solid Lubricants in Ti-6Al-4V

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  • 2. INTRODUCTION Topic - Study of Solid Lubricants In Surface Grinding of Titanium Alloys. Technique Sandwich Grinding Alloy Ti-6Al-4V Problem Replace fluid coolants due to cost, air barrier, film boiling, etc. Approach Reduce heat at its generation stage rather than removing the heat after its generation.
  • 3. OBJECTIVES Identify some Solid Lubricants, which can sustain and provide lubrication over a wider range of temperatures. Development of three such wheels with varying number of slots for lubricant sandwiching. Study and analyze performance of these wheels and compare to conventional wheel in Dry Grinding. To study Normal Force(Fn), Tangential Force(Ft), Grinding Force Ratio(Ft/Fn), Surface Roughness(Ra), and Intermittent work piece surface profiles and force pattern in continuous grinding test. Factors Number of Slots, Type of Lubricant. Force measurements using a 3-component piezoelectric dynamometer. Surface roughness (Ra) of the ground part and its profiles using a Talysurf.
  • 4. WORK PLAN & GANTT. CHART Task % Done Sep. 01-07 Sep. 08-20 Sep. 20-25 Sep.26Oct. 15 Study research papers. - Selection of Solid Lubricants 100 Design Grinding Wheel 100 Purchase 100 Develop sandwiched wheel. 100 Compare and analyse 0 Most efficient solution 0 Final observations 0 Oct. 15- 31 Nov. 18 Nov. 815
  • 5. PROGRESS MADE EXPERIMENT PARAMETERS and decide the work First step was to study the process plan. Gantt Chart was made accordingly and the stages were successfully executed. Choice of Sandwich Grinding technique for grinding process, among options like Taguchi method, Response Surface Method, etc. Criteria Unexplored but the one which has potential and easily applicable. Deciding the process parameters & criteria for performing our experiments. Selection of Solid Lubricants.
  • 6. DESIGNING GRINDING WHEEL The idea was to create a design with required strength so that the wheel does not break but has enough clearance to provide appropriate lubrication. From those designs, we chose the ones which were practically feasible (could be cut) in the market. Final design was done considering specific geometry and tapering.
  • 7. PROGRESS MADE CUTTING THE WHEEL Most time consuming step in our project. Initial techniques considered were among Water Jet Machining, Diamond tool cutting, etc. Cutting was done using Diamond Cutter. Slots were cut at equal spacing, extending radially inward. More width was given to the slot at the inner side so that the taper formed at the slots converged towards the wheel periphery. The inner edge of the slots was given a radius.
  • 8. Solid Lubricants GRAPHITE MOLYBDENU DISULPHIDE CALCIUM FLUORIDE SODIUM SULPHATE 1 Fixed carbon: 80%99.9% 2 Particle size:300mesh 3 Moisture: 0.5%max Size: 1.5um 300 mesh flakes Property: Pure grey powder Particle Size:-300mesh Low SiO2 content. CaF2:98%, CaCO3: