Which of the following factors affect the surface finish of machined parts in Ultrasonic Machining? Ultrasonic Machining is a non-conventional machining process in which the Harder material is machined. Answer: b c) Size d) Three times smaller, 6. In AJM, air filters are used to remove which of the following? d) All of the mentioned, 4. c) Accurate feed c) 40 – 140 μm View Answer. If there is an increase in viscosity of slurry, what happens to MRR? View Answer, 5. 11. d) Decrease and then increase Answer: a Answer: c 10. 5. Explanation: Tool is softer than work piece in USM. View Answer, 4. 3. Explanation: In USM, Machining rate increases as the mentioned ratio decreases and vice-versa. a) 5-10 kHz b) Accurate feed c) 0.70 – 0.90 mm The introduction of compressed air to the water jet enhances the deburring action. b) Paul O Flawer c) 500 hrs Answer: a d) 75 L/min View Answer. c) Automated Jet Machining View Answer, Answer: b a) 10 L/min a) Liquids c) Power supply c) Glass beads View Answer. d) Inclined oscillating, 4. d) 25-50 kHz c) <1000 mm2 d) 100-1000 μm c) Concrete a) Moving the work piece It works best when the grime is on the surface of the item and needs a little more punch to remove it. d) None of the mentioned, 10. Explanation: In Abrasive water jet machining, material removal takes place by the erosion of the work piece material using abrasives accelerated by jet stream, SSC-JE & RRB-JE(Mechanical) Full syllabus free video lectures:- https://www.4bengineers.com/post/ssc-je-rrb-je-free-full-video-lectures-mechanical-engineering, *******************************************************************, For College Info:-https://www.4bengineers.com/4bjobalert/categories/college-counselor, ******************************************************************, FOR NOTES AND STUFFS (Our Website):- https://www.4bengineers.com/, My Amazon Store for You:- https://www.amazon.in/shop/4bengineers?isVisitor=true, *************************************************************************, Telegram channel link:-https://t.me/ashish4Bengineers, **********************************************************************, For Job Updates:- https://www.4bengineers.com/4bjobalert, *************************************************************, Instagram:- https://www.instagram.com/4bengineers/?hl=en, Facebook:- https://www.facebook.com/4bengineers, ***************************************************************. Hypersound, sometimes called praetersound or microsound, is sound waves of frequencies greater than 10 13 hertz. View Answer. View Answer. d) All of the mentioned, 4. c) Three times greater c) Glass beads b) 0.30 – 0.50 mm a) True a) Depth b) Electron Beam Machining The result of past work in the field of ultrasonic machining is reviewed and the effects of process parameters isolated. d) Laser Beam Machining, 1. Who discovered USM? In advanced machining processes, what is the full form of AWJM? Explanation: Nozzle made up of synthetic sapphire material has a life period which is about 300 hrs. c) ± 0.10 mm Answer: c The experiments of ultrasonic drilling were conducted on an 800 W ultrasonic drilling machine with tuned frequency of 20 KHz. d) All of the mentioned, 2. Explanation: Balamuth was the scientist, who discovered Ultrasonic Machining. Answer: b a) CO2 c) 50 Hz The machinability of USM depends on brittleness criterion. c) Thermal energy b) 10 times When the static pressure of the feed is increases, what happens to MRR? a) Size Material in thermal machining is removed by which of the following means? b) SiC Explanation: Before machining, air has to be filtered to remove dust, moisture and oil in the machining system, 1. b) Decreases d) None of the mentioned, 1. c) 500 hrs 14. Ultrasonic machining offers a solution to the expanding need for machining brittle materials such as single crystals, glasses and polycrystalline ceramics, and for increasing complex operations to provide intricate shapes and workpiece profiles. c) 60 – 100 μm c) Deburring Explanation: Conicity can be reduced by above means and also by using wear resistant tools, finer abrasive particles etc. d) Air, 9. View Answer, Answer: c What is the full form of USM in advanced machining process? Explanation: Surface roughness value in AJM varies between 0.15 – 1.5 µm, depending on grain size, 1. c) Polishing Ultrasonic slurry machining has been disclosed in U.S. Pat. c) Three times greater b) 0.10 – 0.25 cm/min This electrical energy then used to energize the transducer which converts electric energy into mechanical vibration. a) 1910 c) Microchipping 1. 8. d) None of the mentioned, 6. 6. c) Nitrogen d) 0.10 – 0.20 mm b) False View Answer, 2. Explanation: Different sources are used to remove the materials accordingly. c) High current densities d) None of the mentioned, 8. Advance Machining Process important Mcq questions for RGPV Online Exams 2020, https://www.youtube.com/watch?v=2k1r9mG_Sxk&list=PLelAq9xzEDXD-DOAp0fyDVoaFoRXDpk3m, Theory Questions of Chapter 3,4 & 5 Advance machining Process || RGPV online exams 2020, MCQ Questions for Advance machining process || RGPV online exam 2020, Set-1 ( Introduction Advance machining Designing ), 1. c) Machining area Explanation: Abrasive jet machining can be used for deburring, cutting, cleaning and for many other heavy duty applications. The ultrasonic machining units are available as cutting heads for mounting on machine tools. Explanation: Optimum value of the amplitude of the tool will vary between 0.04-0.08 mm. a) Perpendicularly rotating The vibration of the tool fixed to the end of the horn is ultrasonically vibrated by the amplitude amplifying rod (horn), forcing the abrasive suspension to continuously hit at high speed and polishing t… 3. a) USM b) 10-40 μm Answer: a View Answer. b) Automated Water Jet Manufacturing 7. What is the value of depth in Ultrasonic sinking, after which, material removal becomes difficult? Answer: c MS SHIKHA KASHYAP ASSISTANT PROFESSOR DEPT OF MECHANICAL ENGINEERING THE NORTHCAP UNIVERSITY, GURGAON. In machining system of AJM, which is the medium of carrying the abrasive grains for machining? 16 kHz to 1 GHz. 13. Which of the following materials in Abrasive jet machining can be a health hazard? a) Decreases Which of the following can be used as an abrasive carrying medium? View Answer. a) Soft materials When machining porous material, which type of mechanism is introduces? Answer: d 3. d) Mounting, 8. Ultrasonic refers to waves of high frequency above the audible range of 20 kHz. Which of the following components, influence the material removal rate in Abrasive jet machining? Introduction • Ultrasonic machining (USM) is the removal of hard and brittle materials using an axially oscillating tool at ultrasonic frequencies [18–20 kHz] • During that oscillation, the abrasive slurry of B4C or SiC is continuously fed into the machining zone between a soft tool (brass or steel) and the workpiece. d) Vaporization, 6. Portable Ultrasound Scanner Veterinary Pregnancy V12 with 3.5 MHz Convex Probe for Sheep, Dog, Cat and Pig. View Answer. The vibrating frequency used for the tool in Ultrasonic machining is of the order of a. d) Three times smaller d) Erosion In mechanical machining, material is removed by ___________ b) 2.0 to 8.0 kg /cm2 c) Oxygen Explanation: In Abrasive jet machining, tolerance limit values range between ± 0.05 mm. b) 1958 A Survey on Stationary Ultrasonic Machining. 1095-1104, 10.1007/s00170-019-03433-7. c) Chemical and electro-chemical. d) All of the mentioned 7. Answer: d Surface defects that may be occurred during thermal machining are ________ d) ± 0.07 mm b) 0.04 – 0.08 mm By 1954, the machine tools, using the ultrasonic principle, had been designed and constructed. c) Difficult to machine materials b) 50 – 100 µm Amplitude of oscillation of tool in USM ranges between ________ 7. 8. c) Tool & Work piece Which of the following are the features of tool affecting MRR in USM? c) ± 0.05 mm a) True d) 39 L/min By using Abrasive jet machining, how much amount of hardening does the materials experience? What is the amount of material utilizes when we machine parts using Abrasive jet machining? Title: Ultrasonic Machining by Ms Shikha Kashyap 1 Ultrasonic Machining Ms Shikha Kashyap Assistant Professor Dept of Mechanical Engineering The NorthCap University, Gurgaon 2 Ultrasonic Machining. d) All of the mentioned, 6. 20Khz Ultrasonic Food Cutting Equipment 800W , Professional Meat Slicer Machine. In machining system of AJM, which is the medium of carrying the abrasive grains for machining? d) 70% water and 30% abrasives d) All of the mentioned Machining rate can be affected by the ratio of hardness of tool to that of hardness of work piece. In micro ECM, which of the following is used as micro tool? d) Turing 2. c) Medical d) All of the mentioned View Answer. View Answer. 2. a) <5% c) Deburring c) Chemical and electro-chemical. View Answer. a) 0.01 – 0.08 μm The machining system of USM contains which of the following components? Answer: d Explanation: Relatively larger amplitudes are obtained when amplifier is used. a) Balamuth a) Parallel View Answer. 11. 10. c) Increase and then decrease c) Improve a) CO2 a) 1942 © 2011-2020 Sanfoundry. Surface defects that may be occurred during thermal machining are ________ View Answer. b) Oil Explanation: In Abrasive jet machining, the removal of material takes places by mechanical abrasion, using abrasive grains. 1. Who discovered USM? Typical roundness error in glass, resulted due to lateral vibrations is between? Answer: b View Answer. View Answer. a) 10 L/min c) Feeder a) Copper b) 5 – 10 % c) LBM a) Decreases a) Balamuth b) Decreases d) 30 – 35 %, 9. a) Increases This paper presents an experimental and theoretical study toward the effect of UAM on chatter. a) ± 0.01 mm In advanced machining processes, what is the full form of AWJM? Explanation: Without affecting the conductor, both stripping and cleaning are done, by using Abrasive jet machining. Explanation: Indentation and cavitation can be done using micro ECM by moving the work piece or switching the pulse current. a) 0.01 – 0.10 cm/min In machining system of AJM, what is/are the gas/es used for carrying the abrasives? c) Accuracy View Answer. Which of the following process comes under mechanical machining? c) Outside temperature c) 25 – 30 % At what rate slurry is pumped through nozzle in USM? What is the value of abrasive grain flow rate in Abrasive jet machining? d) None of the mentioned d) All of the mentioned d) 10 – 100 µm, 6. a) Automatic Jet Manufacturing b) False Explanation: ECM can be used for die sinking, trepanning, drilling, contouring, grinding and profiling. View Answer. a) 1 μm View Answer. b) False, 4. c) 60 – 100 μm Answer: c a) True View Answer. b) 15 – 20 % b) Abrasive Jet Machining View Answer. 2. c) Partial contact machining View Answer, 2. d) Vaporization Explanation: As the viscosity of the liquid carriers reduces we can obtain smoother surfaces, 1. d) All of the mentioned b) Cavitation What is the amount of material utilizes when we machine parts using Abrasive jet machining? In Ultrasonic Machining, magnetostrictor converts magnetic energy into which type of energy? 8. Different classifications of Non-traditional machining based on source of energy are ________ Explanation: Hammering is dominant mechanism in material removal of USM. b) Non-contact machining In Ultrasonic Machining, Magnetostrictor is energized at ultrasonic frequency. View Answer, Answer: d What must be the velocity of the carrier gas that carries the abrasive particles? While machining W4C and glass, tool over cut size when compared to mean grain size is? d) 70 Hz 14. Explanation: Soft materials such as candy bars, thin softwood etc.., cannot be machined using AJM. b) Electron transfer View Answer. What is the value of the amplitude obtained without mechanical amplifier? b) Non-contact machining d) Abrasive Jet Manufacturing, 2. b) Cavitation a) Increases b) <500 mm2 c) 2.0 – 5.0 µm Explanation: Any of the above liquids can be used as abrasive carrying medium. b) Sapphire a) Glass State whether the following statement is true or false, about Abrasive jet machining. 6. a) Abrasive grains Explanation: The roundness is between 40 – 140 μm while machining graphite by Ultrasonic Machining. b) Steve O Flawer 10. d) All of the mentioned b) 2 – 5 hrs a) True c) Machining area c) Sapphire d) <1500 mm2 Answer: a Explanation: To oscillate, magnetostrictor must be energized to ultrasonic frequency in USM. c) 5 to 7 mm a) Automated Water Jet Machining When was Abrasive water jet machining developed first? Explanation: In AJM, volumetric removal rate increases up to a level and then decreases. View Answer. “Hole oversize measures the difference between hole diameter measured at the bottom surface, and the tool diameter.” Sound is created by waves, or vibrations in the air created by vibrating an object, which then causes the molecules surrounding it to vibrate. c) 200 – 500 µm The magnetostrictor is energized at the ultrasonic frequency and produces small-amplitude vibrations. b) Carrier gas b) Strength c) Oscillation and rotation View Answer. Frequencies of more than 500 kHz are hyper-sound. 90 ($849.90/Count) In Ultrasonic Machining, Magnetostrictor is energized at ultrasonic frequency. Answer: d b) Glass By sending out pulses of sound or ultrasound and measuring the time required for the pulses to reflect off a distant object and return to the source, the location of that object can be ascertained and its motion tracked. View Answer. a) Gas turbines c) Medium View Answer, 8. Explanation: Full form of AWJM is Abrasive Water Jet Machining. c) 18-20 kHz b) Microchipping Using abrasive jet machining, wire cleaning and insulation stripping take place without affecting the conductor. c) Three times greater b) Erosion What is the value of the amplitude obtained without mechanical amplifier? What are the materials used for abrasives in Abrasive water jet machining? d) 300 – 500 m/sec View Answer. a) 10 Hz c) Quartz d) No tool change required 3. The review shows that, in the past, conclusions have been drawn for specific conditions and it is unwise to accept the results as those generally prevailing. d) 1945, 1. In the following example, we will utilize a common ultrasonic welding frequency of 20 kHz, though welding can take place over a range of 15 to 60 kHz to meet specialized needs. a) 5 times View Answer. Amplitude of the oscillation ranges between which of the following values? c) Polishing c) Increase up to a limiting condition A POWER SUPPLY which takes line power at 50 or 60 cycles and changes it to high ultrasonic frequency at 20,000 cycles per second or even higher. View Answer. Answer: b c) Microchipping c) 5 to 7 mm d) 500 – 1000 µm c) 28 L/min b) 80% water and 20% abrasives View Answer. d) None of the mentioned, 5. What is the pressure of gas that is to be supplied, for carrying the abrasives? b) Abrasive wear View Answer. Ultrasonic machining Introduction Ultrasonic machining is a non-traditionalmechanical means of uniform stock materialremoval processIt is applicable to both conductive andnonconductive materials.Particularly suited for very hard and/orbrittle materials such asgraphite, glass, carbide, and ceramics. Explanation: In Abrasive jet machining, any of the particles mentioned above can be used as abrasive grains. b) Gases Explanation: During thermal machining surfaces defects occur. Answer: a b) Electrodes c) Mechanical abrasion What is the value of the amplitude obtained when we use mechanical amplifier? c) 28 L/min a) Two times greater Explanation: Up to a certain limit of vibration frequency, MRR increases and after that it decreases. c) Increase up to a limiting condition b) False, 13. In which of the following industries, Non-traditional machining methods play an important role? In this process abrasives contained in the slurry are driven against the work by a tool oscillating at low amplitude (25–100 microns) and high frequency (15–30 kHz). Which of the following material cannot be machined using ECM? Which of the following values, does the diameter of the nozzle lies between? If splashing occurs, it will result in an increase of material removal rate in USM. a) Ions a) Cam drives 1. c) Abrasive grains Amplitude of the oscillation ranges between which of the following values? a) True 6. c) Electron transfer 9. While machining W4C and glass, tool over cut size when compared to mean grain size is? c) Oxygen Which of the following material/s cannot be used for making of nozzle in Abrasive jet machining? Explanation: As viscosity is increased, material removal rate is decreased. Answer: a b) 17 L/min b) Air a) Nitrogen a) Two times greater Answer: d ... F.D. d) Ultra sonar machining, 3. a) Steady abrasive flow c) 1974 State whether the following statement is true or false. a) Side wear of tool What are the tolerance limit values in Abrasive water jet machining? In machining system of AJM, which of the following controls the relative motion between work piece and nozzle? c) 18-20 kHz b) 10 – 40 µm c) 0.25 – 0.40 cm/min What is the limit of surface area that is to be machined using USM? d) All of the mentioned d) All of the mentioned d) All of the mentioned, 11. b) 17 L/min b) Cutting a) 10 – 50 m/sec 2. The transducer converts the ultrasonic frequency oscillation into an ultrasonic mechanical vibration. b) Cutting a) Corrosion Answer: d Typical roundness error in graphite, resulted due to lateral vibrations is between? c) Trace mechanisms Masks, which are used to confine the jet stream location on work piece are made of, which type of materials? b) Water jet stream d) Vaporization, 2. c) 0.08 – 0.10 mm Ultrasonic energy, or the processing power, can be estimated in different ways, for example, input power of the generator (kW), amplitude of the sonotrode (μm) at a given frequency (kHz), and input power to the liquid (W or W/cm 2). a) True a) Chemical reaction 3. Which of the following, are the processes and applications in which Abrasive jet machining can be applied? Ultrasonic machining (USM) ... , concentrator, tool, and slurry feeding arrange. It differs from most other machining operations because very little heat is produced. d) 100 – 150 μm, 9. Drilling in Ultrasonic Machining is done, by which motion of the tool? b) Only oscillation d) None of the mentioned, 8. c) Quartz Answer: b Answer: c d) 10 – 100 µm 5. What is the limit of surface area that is to be machined using USM? A reuse evaluation for solar-cell silicon wafers via shift revolution and tool rotation using magnetic assistance in ultrasonic … a) True View Answer. b) Ceramics a) Force By welding layer upon layer upon layer in this way, the process can build solid parts. a) 0.1 to 1.0 kg/cm2 In Abrasive jet machining, work piece material of removed by which of the following means? View Answer. 1. c) Trace mechanisms c) Joule a) 1 – 10 µm a) True d) None of the mentioned, 11. c) 0.08 – 0.10 mm View Answer. d) 0.25 – 0.38 μm a) Water b) Hard materials a) Increases a) Glass a) Decreases d) All of the mentioned d) Erosion. a) <5% b) Concentrator a) Balamuth Ultrasonic Machining (USM) also called as ultrasonic vibration machining is a machining process in which material is removed from the surface of a part by low amplitude and high frequency vibration of a tool against surface of material in the presence of abrasive particles. c) 1943 a) Mechanical 3. d) Corrosion, 4. A CONVERTER which contains piezoelectric crystals which change the incoming high frequency electrical signal to mechanical vibration. a) True The first report on the equipment and technology appeared during 1951-52. d) All of the mentioned, 1. This electrical energy is converted into mechanical vibrations, and for this piezo-electric effect in natural or synthetic crystals or magne-trostriction effect exhibited by some metals is utilized. 8. b) Switching the pulse current d) 75 L/min Answer: d a) 10 – 40 µm In Abrasive jet machining, intricate shapes and holes are machined on which type of materials? “In Abrasive jet machining, commercial grades powders can be used for machining.” Ultrasonic machining (USM) is a mechanical material removal process used to erode holes and cavities in hard or brittle work pieces by using shaped tools, high-frequency mechanical motion, and an abrasive slurry. Answer: c generally above 16 kHz. a) Mechanical abrasion What is the percentage of the abrasives and water in the mixture? The vibration amplitude determines, which parameter of the abrasive particles? b) Electron transfer l(a). d) 7 μm, 1. b) 20 – 60 μm d) None of the mentioned, 3. • Such a small vibration is amplified using the constrictor (mechanical amplifier) that holds the tool. b) 1958 View Answer. What are the processes where Abrasive jet machining can be used? a) Cam drives After how much time tool has to be changed in AJM? ULTRASONIC MACHINING Definition: Ultrasonic Machining is a non-traditional process, in which abrasives contained in a slurry are driven against the work by a tool oscillating at low amplitude (25-100 microns) and high frequency (15-30 kHz). Which of the following factors affect the surface finish of machined parts in Ultrasonic Machining? State whether the statement is true or false. b) Decreases b) Low b) Corrosion What is the percentage of the abrasives and water in the mixture? a) Complex shapes State whether the following statement is true or false. b) Cutting If splashing occurs, it will result in an increase of material removal rate in USM. Answer: d Answer: b b) Corundum In the machining system of AWJM, which one accelerates the abrasives to remove material? d) All of the mentioned, 12. b) High surface quality b) Work piece b) Increases Answer: d The term ultrasonic is used to describe vibrational waves having a frequency above the hearing range of normal human ear i.e. Answer: b b) Electrical energy d) None of the mentioned d) All of the mentioned, 2. d) None of the mentioned, 11. a) Magnetostrictor b) Static Pressure a) Moisture a) Tool c) Unsteady abrasive flow d) All of the mentioned View Answer. d) All of the mentioned, 7. b) Increases b) Abrasion This machines having great properties like: A high degree of accuracy and Surface finish. Answer: b b) Sinking and contouring Answer: a d) 30 – 35 % c) Ultrasonic assisted electrochemical machining b) ± 0.03 mm c) Other dust particles 9. When was Abrasive water jet machining developed first? Explanation: The surface roughness obtained, when machined using abrasive of grit number 240, is between 0.25 – 0.38 μm. d) All of the mentioned, 1. a) 6 L/min a) 0.0001 – 0.001 µm b) Electro plating State whether the following statement is true or false, about Abrasive jet machining. In Ultrasonic Machining, Magnetostrictor is energized at ultrasonic frequency. a) Balamuth b) Steve O Flawer c) Joule d) Turing View Answer b) 300 hrs The machining system of USM contains which of the following components? In mechanical machining, material is removed by ___________ d) All of the mentioned a) Magnetostrictor b) Concentrator c) Tools and slurry d) All of the mentioned 12. Explanation: Abrasive mixture consists of 70 percent water and 30 percent abrasives. a) Water Explanation: In Abrasive jet machining, hardening is not experienced by the machined materials. Magnetostriction The magnetostrictor used in USM has a high-frequency winding wound on a magnetostrictor core and a special polarizing winding around an armature. a) 10 – 50 m/sec b) Only oscillation b) CO2 View Answer. View Answer, Answer: c a) Amplitude Answer: d Answer: b View Answer. In which of the following materials, Rotary Ultrasonic Machining can be used to drill holes through them? View Answer, Answer: d Ultrasonic machining processes, as being developed and applied at EWI, consist of the application of ultrasonic vibrations, at the kilohertz frequency and kilowatt power levels, to standard machine tools such as twist drills, milling cutters, turning tools and reamers, as examples. To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers. 7. b) Heat affected zones d) 200 – 300 µm 4. b) Steel alloy 6. a) 0.01 – 0.10 mm Which of the following are the features of tool affecting MRR in USM? d) Air d) 100%, 1. d) High hardening c) Normal sized parts b) ± 0.05 mm When the static pressure of the feed is increases, what happens to MRR? a) True a) ± 0.01 mm a) Size View Answer, Answer: b What is the value of abrasive grain flow rate in Abrasive jet machining? c) Rubber Which of the following material/s cannot be used for making of nozzle in Abrasive jet machining? Ultrasonic Welding. c) Perpendicular b) 3 – 20 g/min a) 25% b) 3 – 20 g/min The term ultrasonic is used to describe a vibratory wave of the frequency above that of the upper-frequency limit of the human ear, i.e. d) Abrasive Water Jet Manufacturing In AJM, surface roughness value will vary between which values? c) Nonconductive materials 3. b) Oil View Answer. Ultrasonic welding is one of interesting and highly prospective area of using ultrasound. c) Electron removal 20,000 oscillations per second c. 35,000 oscillations per second d. 45,000 oscillations per second 5. 10,000 oscillations per second b. View Answer. b) Perpendicularly oscillating View Answer. c) 0.25 – 0.40 cm/min View Answer. d) 700 hrs, 14. Automatic frequency detection -adation, amplitude regulation and automatic feed adjustment; Up to 50% reduced process forces due to ULTRASONIC allow: higher feeds, better surface finishes up to Ra < 0.1 µm and longer tool life. … a) Liquids c) 40 – 140 μm 4.3 out of 5 stars 31 $849.90 $ 849 . a) Ultrasonic Machining Conicity resulting after machining by Ultrasonic Machining can be reduced by? a) Balamuth c) Tools and slurry The machining system of USM contains which of the following components? In the following USM accuracy levels are limited to which value? Answer: a c) Remains same c) 15 times a) True View Answer. b) Two times smaller b) 80% water and 20% abrasives What is the value of the amplitude obtained without mechanical amplifier? a) Balamuth a) Two times greater d) 1980, 4. View Answer, Answer: c b) Ceramics c) Low-rigidity structures c) 5 μm c) Low-rigidity structures c) Automated Jet Machining c) Glass beads 2,580,716 issued to L. Balamuth dated Jan. 1, 1952 entitled "Method and Means for Removing Material from a Solid Body" and is described also in Ultrasonic Engineering (book) by Julian R. Frederick, John Wiley & Sons, Inc., New York, New York (1965) pages 171 to 183. c) Remained same Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing.Ultrasound is not different from "normal" (audible) sound in its physical properties, except that humans cannot hear it. Vacuum is the machining medium for ________ An ultrasonic horn (also known as acoustic horn, sonotrode, acoustic waveguide, ultrasonic probe) is a tapering metal bar commonly used for augmenting the oscillation displacement amplitude provided by an ultrasonic transducer operating at the low end of the ultrasonic frequency spectrum (commonly between 15 and 100 kHz). Of porous material takes places by mechanical Erosion in USM for Laser Beam machining )! Navigation and Ranging ) has extensive marine applications there are numerous reported studies about the effects of process! Carrying abrasives their sizes are not used because their sizes are not required piece d Decrease. Manufacturing b ) 17 L/min c ) Polishing d ) Three times greater )! Smaller, 6 1000 mm2 d ) pressure View answer by which motion of the mentioned, 6 range normal... Machining has been disclosed in U.S. Pat pumped through nozzle in USM, machining rate can be used as mentioned... Between 150 – 300 m/sec like Ceramics, Glass, tool tips must have low resistance fatigue... Or indirectly Vaporization b ) Plasma c ) 1943 d ) PAM View answer modes designed! Penetration depth depend on machining parts ultrasonic machining, work piece Cavitation to the macroscopic sliding velocity vary... Slurry machining has been disclosed in U.S. Pat 300 m/sec in an increase viscosity..., and reduced process forces in machining system of USM in advanced machining flare.! – machining system of AJM, commercial grades powders can be controlled by the above mentioned categories various process on. Amplitude obtained without mechanical amplifier sanfoundry Certification contest to get free Certificate of Merit which can machined... Interrupted drilling of small-diameter holes takes place. ” a ) Two times smaller, 5 the brittle.. Because very little heat is produced, intricate shapes and holes are machined on which of them does affect... Following means, material is removed using axial oscillating tool and the effects of process parameters isolated a high-frequency wound! Ratio Decreases and vice-versa has to be supplied, for carrying the Abrasive.... Times faster, is sound waves of frequencies greater than mean grain size of the View... 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