i need the answer quickly Q3:2- Co(25 Marks)A/ A round hole 10 mm in diameter is being produced in a Ti-alloy block by EDM. Calculate:I- The time required for machining a 15 mm deep hole and compare the time with that for drílling.2- Wear rate of the electrode.3- Wear ratio.Assuming:The melting point of workpiece material1873.15 KThe melting point of electrode1373.15 KEDM current100 ASpindle speed300 грmFeed0.15 mm/rev

Answered: (25 Marks) Q3: A A round hole 10 mm in…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Define the proportional limit?
The frontal working area of the electrode in an Electrochemical Machining (ECM) operation is 1000 mm. The applied current is 900 amps and the voltage is 12 volts. The resistivity of the electi olyte is 140 Q-mm. The material being cut has a valency of 4 and specific removal rate of 0.0342 mm /A-s. If the process efficiency is 90%, determine the material remova! rate (MRR) and inter-electrode gap after 30 minutes of machining when the resistivity of the electrolyte has dropped to 75% of its original value.
04 05 a Explain the reasons for the following: 1- The pure aluminum and the copper are generally rated as easy to machine 2- In ultrasonic machining, the stress produced by the impact of abrasive particles on the workpiece surface is high. 3- In rolling process, the coefficient of friction must be sufficient. 4- Difference in solidification between casting and welding processes. 5- Why is it desirable to use energy sources for welding that have high heat densities? 6- Why there might be a change in the density of a forged product as compared to that of the cast blank. D. A cylindrical workpart with D=2.5 in and h=2.5 in is upset forged in an open die to a height = 1.5 in. Coefficient of friction at the die -work interface = 0.10 The work material has a flow curve defined by: K= 40,000 lb/in' and n-0.15. Determine the instantaneous force in the operation (a) just as the yield point is reached (yield at strain = 0.002), (b) at height = 2.3 in. (c) h= 1.9 in, and (d) h = 1.5 in. a List…
SHEET 5 Grinding, Welding and Galvanizing operations 1- Define Grinding process, what are the main characteristics of classification of a grinding wheel? 2- What are the main grinding operations, why coolant is uses in any cutting operation? 3- What are the main classes of welding? 4- With drawing explain flam different types, what type is used in cutting and why? 5- What are the differences between OXYACETYLENE and ARC welding? 6- What are the defects of ARC welding operation? 7- Explain the Electric Resistance Welding? 8- Define the GALVANIZING Process and what are the main governing parameters in this operation?
Example 2. energy per hole during each revolution. Each piercing takes 40 per cent of the time needed to make one revolution. The punch receives power through a gear reduction unit which in turn is fed by a motor driven belt pulley 800 mm diameter and turning at 210 r.p.m. Find the power of the electric motor if overall efficiency of the transmission unit is 80 per cent. Design a cast iron flywheel to be used with the punching machine for a coefficient of steadiness of 5, if the space considerations limit A punching press pierces 35 hotes per minute in a plate using 10 kN-m of the maximum diameter to 1.3 m. Allowable shear stress in the shaft material = 50 MPa Allowable tensile stress for cast iron = 4 MPa
What firce is requure to punch off 5 mm hole out of a 4 mm thick plate if the ultimate punching stress is 200 MPa ?
A motorised metal guillotine machine is required to cut 45 mm diameter hole in a plate of 20 mm thickness at rate of 35 holes per minute. It requires a torque of 7 Nm for an area of hole in mm2. If the cutting takes 1/10 of a second and the speed of its flywheel varies from 165 rpm to 145 rpm, calculate: 1. Energy required to cut a hole. 2. Energy required for cutting work per second. 3. Maximum fluctuation of energy of the flywheel. 4. Mass of the flywheel having radius of gyration of 1.5 m.
The frontal working area of the electrode in an ECM operation is 2000 mm?. The applied current is 2000 amps and the voltage is 12 volts. The material being cut is nickel (valence = 2, CN; =3.42x10-2mm2/A-s). (a) If the process is 90% efficient, determine the cutting rate into the workpart. (b) If the resistivity of the electrolyte is 160 ohm – mm, determine the working gap. Tool feed Tool holder and feed mechanism Formed tool (cathode). Electrolyte flow -Insulation Electrolyte Work (anode) feed mm/min gap micrometers
1. Most common instrument used in the mechanical gages is the dial indicator, which of the following applications cannot be measured by the dial indicator? (a) All of them (b) Perpendicularity (c) Runout (d) Circularity (e) Roughness 2. The main mechanism for the flank wear on the single point cutting tool is: (a) Oxidation wear (b) Adhesion wear (c) None of them (d) Diffusion wear (e) Plastic deformation 3. Higher cutting speeds and temperatures are the main mechanism of the following tool wear mechanism: (a) Diffusion wear (b) Abrasion wear (c) None of them (d) Adhesion wear (e) Plastic Deformation
I need an answer for letter b. Please explain further :<
Enumerate the steps in cutting and piercing a plate using gas cutting.
Please solve question 2,3 and 13. Determine the % change in the machine time for an USM operation cutting WC plate when the tool material is changed from copper to stainless steel. Take ratio of flow stress of WC to flow stress of copper is 4.6 and the ratio of flow stress of WC to the flow stress of SST is 1.2.

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