Related InterviewSolutions

• Linked QuestionA low carbon steel bar of 147mm diameter with a length of 630mm is being turned with an uncoated carbide insert. The observed tool lives are 24min and 12min for cutting velocities of 90m/min and 120m/min respectively. The feed and depth of cut are 0.2mm/rev and 2mm respectively. Use the unmachined diameter to calculate the cutting velocity.When tool life is 20min the cutting velocity in m/min is
• A tool with side cutting edge angle of 30o and end cutting edge angle 10o is used for fine turning with a feed of 1mm/rev. Neglectign nose redius of the tool, the maximum (peak of valley) height of the surface roughness produced will be
• A hemispherical cup of radius R is formed in a press-working operation. The radius of blank would be
• A bar of 75 mm diameter is machined to reduce its diameter by orthogonal cutting. If the length of the cut chip is 73.5 mm and rake angle is 15∘, the shear plane angle is
• A single-point cutting tool with 12o rake angle is used to machine a steel work-piece. The depth of cut, i.e., uncut thickness is 0.81mm. The chip thickness under orthogonal machining condition is 1.8mm. The shear angle is approximately.
• A specimen is being grinded on a surface grinder with grinding wheel speed of 1600 m/min, and workpiece speed of 25 mm/min, grinding wheel diameter of 200 mm, grinding depth of cut of 0.025 mm. Take transverse feed of workpiece = 4.4 mm/pass and specific cutting energy = 2200J/mm3. Assume that pitch of grits at periphery of grinding wheel is 12 mm, the factor for negative rake angle of abrasive grains as 5. Mean grinding power in above operation will be___kW0.504
• Linked Data:In a orthogonal cutting experiment, an HSS tool having the following tool signature in the orthogonal reference system (ORS) has been used : 0−10−7−710−75−1Given: Width of cut =3.6mm Shear strength of workpiece material =460N/mm2; Depth of cut =0.25mm Coefficient of friction at chip tool interface =0.7Minimum power requirement (in kW) at a cutting speed of 150m/mm is
• Determine the load required to punch a 20mm diameter hole in a 2mm thick sheet. The properties of the material of the sheet are:Tensile strength −580MPaYield strength in tension −410MPaShear strength −350MPaYield strength in shear −250MPaThe load is kN is
• A single point cutting tool with 0° rake angle is used in an orthogonal machining process. At a cutting speed of 180 m/min, the thrust force is 490 N. If the coefficient of friction between the tool and the chip is 0.7, then the power consumption (in kW) for the machining operation is 2.1
• A workpiece of 100cm length and 30cm width is machined by planning operation with a feed of 0.3mm/stroke. The machine tool executes 10 double strokes per minute. The planning time for a single pass is