a) 10 L/min 2. Answer: d Explanation: In USM, tool tips should must have high wear resistance and fatigue strength. The rate of material removal depends on which of the following features? b) Diameter a) 01 –20 μm a) Increases b) 1958 8. View Answer. Which type of materials can be machined using Abrasive jet machining? a) Perpendicularly rotating Answer: d State whether the following statement is true or false, about Abrasive jet machining. 8. c) Electrons d) Decrease up to a limiting condition, 1. What is the frequency of mixing chamber, consisting of gas and abrasives? 9. View Answer. ECM is used to _________ the sharp edges produced after rough cuts. After how much time tool has to be changed in AJM? In AJM, abrasive jet from the nozzle follows, which type of path for a short distance? Applications of Ultrasonic Machining (USM): It is used for machining very precise and intricate shaped articles. a) Size d) 0.10 – 0.20 mm, 5. Explanation: Typical ultrasonic speeds used are between 0.4 – 1.4 cm/min, used in producing EDM electrodes. c) Medical Polymer-based composite materials posses superior properties such as high strength-to-weight ratio, stiffness-to-weight ratio, and good corrosive resistance and therefore, are preferred for high-performance applications such as in the aerospace, defense, and sport goods industries. As the tool area increases, what happens to MRR? a) True What is the machinability rate of glass by USM? ULTRASONIC MACHINING (USM) INTRODUCTION • 1927 –Wood and Loomis proposed the use of ultrasound for machining. b) Ceramics 2. b) Ultrasonic machining In Abrasive jet machining, work piece material of removed by which of the following means? In other hand, in AHRG BS-476, increment in material removal rate by 61.24%, tool wear rate by 31.46% and surface roughness by 23.85%. How much percent of the abrasives are recommended in general for abrasive medium? Economical for low production runs. a) Only rotation d) 7 to 10 mm, 8. When was Abrasive water jet machining developed first? c) Glass beads 4. b) Melting Amplitude of oscillation of tool in USM ranges between ________ Introduction Ultrasonic machining is a non-traditional machining process. a) Hammering d) <1500 mm2 Ultrasonic Machining can be used for which of the following processes and applications? In machining system of AJM, which is the medium of carrying the abrasive grains for machining? Work material, Tool material, ... MACHINABILITY IN USM OF TIT ANIUM. a) Glass In Ultrasonic Machining, magnetostrictor converts magnetic energy into which type of energy? Answer: c If splashing occurs, it will result in an increase of material removal rate in USM. 1. a) Side wear of tool c) UV spectrum manufacturing d) Vaporization b) 2 – 5 hrs d) None of the mentioned, 4. d) All of the mentioned. You’ll notice the difference in sharpness, color, contrast, and vignetting. a) Vaporization 9. d) Abrasive Jet Manufacturing, 2. Vibration frequency and amplitude: The frequency of vibration is directly proportional to the material removal rate. b) Static Pressure View Answer. View Answer. b) False, 4. d) All of the mentioned, 5. c) Nitrogen a) Decreases View Answer. 8. here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Advanced Machining Questions and Answers – USM – Machining System, Next - Advanced Machining Questions and Answers – USM – Factors Affecting MRR, Machine Design Questions and Answers – Cast Steel & Aluminium Alloys, Machine Design Questions and Answers – Copper Alloys & Die Casting Alloys, Chemical Process Calculation Questions and Answers, Engineering Physics II Questions and Answers, Waste Water Engineering Questions and Answers, Manufacturing Engineering / Processes II Questions and Answers, Manufacturing Engineering / Processes I Questions and Answers, Machine Tools & Machining Questions and Answers, Advanced Machining Processes Questions and Answers, Advanced Machining Questions and Answers – MAF – Process parameters and MRR, Advanced Machining Questions and Answers – Abrasive Jet Machining – Introduction and Machining system, Advanced Machining Questions and Answers – Water Jet Machining – Introduction and Machining system, Advanced Machining Questions and Answers – Ice Jet Machining, Advanced Machining Questions and Answers – Electro Discharge Machining-Introduction, Advanced Machining Questions and Answers – Plasma Beam Machining-Introduction And Machining system, Advanced Machining Questions and Answers – Abrasive Water Jet Machining – Introduction, Advanced Machining Questions and Answers – Non Traditional Machining, Advanced Machining Questions and Answers – Electrochemical Buffing-Introduction, Material Removal, Advanced Machining Questions and Answers – Electrochemical Superfinishing-Introduction, Material Removal, Process accuracy, Advanced Machining Questions and Answers – CHM – Process Parameters and Material removal. a) 10 Hz 7. Answer: c a) Large parts b) Non-contact machining Answer: d c) Polishing c) Increase up to a limiting condition “Rotary Ultrasonic Machining is the process in which, interrupted drilling of small-diameter holes takes place.” Answer: a Explanation: As amplitude of the tool increases, rate of material removal increases. 6. In the following properties of nozzle, which of them does not influence the MRR? b) 0.001 – 0.1 µm Explanation: Tool over cut size is 2 or 4 times greater than mean grain size. What is the percentage of contribution of cavitation to the total material removed? 8. 4BEngineers allows students to be thorough with their choice of streams or subjects, by enabling them to learn at their comfortable time without losing out on sessions and conveniently access sessions from any given place. c) Corrosion b) Glass a) Balamuth Answer: a Linear penetration rates up to 0.4 mm/s. Accuracy of USM. In chemical machining is material removal takes by? While machining B4C, tool over cut size when compared to mean grain size is? View Answer. The modal of polycarbonate bullet proof glass and the abrasive particle is prepared to study the effect of machining mechanism. 113/45 View Answer. d) All of the mentioned, 4. Holes as small as 0.1 mm can be drilled. Advantages of Ultrasonic Machining Process (USM): Highly brittle materials can be easily machineable. Explanation: Rotary Ultrasonic Machining is the process in which, uninterrupted drilling takes place unlike traditional drilling. b) Ceramics 8. 2. Answer: d “Hole oversize measures the difference between hole diameter measured at the bottom surface, and the tool diameter.” c) 50 Hz The machining system of USM contains which of the following components? View Answer. 7. View Answer, 5. This study aimed to compare the machinability of ZLS and LDGC in diamond grinding in terms of mach … These are mainly due to the abrasive nature of the synthetic fibres. 2. d) All of the mentioned, 7. a) Hammering a) Decreases Explanation: As static feed pressure increases, MRR increases up to a limiting condition and then no further increase takes place, 1. So it is used in optical and electrical application where more precise and quality cutting is required. Answer: b What are the materials used for abrasives in Abrasive water jet machining? c) Remained same d) All of the mentioned, 1. At what rate slurry is pumped through nozzle in USM? As the vibration frequency increases, what happens to material removal rate? d) Mounting d) 25 – 40 hrs, 13. d) 100% a) 20% water and 80% abrasives Shaw’s Model of USM Mechanics In this model the direct impact of the tool on the grains in contact with the work piece is taken into consideration. c) Shape a) 1910 a) Direct injection of slurry Explanation: In Abrasive jet machining, tool changes are not required. View Answer. b) Corrosion a) Size Answer: b View Answer. Which is softer material in USM? Non-Traditional machining is recommended when we need which of the following features? View Answer. Answer: a a) Moisture Explanation: ECM can be used for machining high strength alloys and hardened steels which led to many cost-saving applications. Ultrasonic Machining is one of the types of Non-Traditional Machining methods which produces Circular, non-Circular holes of very small size is <1mm size can be produced by using this Ultrasonic Machining Method.. This paper is developed an innovative process of chemical assisted ultrasonic machining of polycarbonate bullet proof UL-752 and acrylic heat resistant BG-476 glass and conducted an investigational to optimize the machining parameters associated with multiple performance characteristics using Grey relational analysis. a) True 5. b) 20 – 60 μm a) Size View Answer. Answer: c d) 1.10 – 1.50 mm, 12. a) Direct injection of slurry Masks, which are used to confine the jet stream location on work piece are made of, which type of materials? The surface topography is … d) Air, 9. View Answer. a) 0.01 – 0.10 µm d) None of the mentioned c) Joule c) 25 – 30 % d) 25.0 to 35.5 kg/cm2 a) Moisture mobility; nucleation rate maximizes just above Tg, while the crystal growth rate is the highest between Tg and Tm (equilibrium melting temperature) [9]. Conicity resulting after machining by Ultrasonic Machining can be reduced by? Value: ... and compliance from a single pane of glass. Explanation: Conicity can be reduced by above means and also by using wear resistant tools, finer abrasive particles etc. a) True Answer: c Author information: (1)Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, School of Mechanical Engineering, Tianjin University, Tianjin, 300354, China. 3. d) Three times smaller Explanation: Mixing chamber consisting of carrier gas and the abrasive grains, vibrates at a frequency of 50 Hz. a) Die sinking d) Vaporization, 2. 11. Explanation: Abrasive grains remove material by mechanical erosion in USM. b) 10-15 kHz d) Distance from work piece Explanation: Velocity of abrasive carrier gas must be between 150 – 300 m/sec. Like the 70–300mm f/4.5–5.6 DO it contains an image stabilizer; however, for focusing it uses the lower quality micro-USM design, and therefore requires the focus motor to be disengaged before manual focusing. Which of the following produces small indents and cavities using micro ECM? In Ultrasonic Machining, Magnetostrictor is energized at ultrasonic frequency. View Answer. Explanation: Abrasive jet machining can be used for micro deburring of hypodermic needles. By using Abrasive jet machining, how much amount of hardening does the materials experience? a) Automobile b) Work piece What is the life of Tungsten carbide material nozzle? b) 10-40 μm d) Abrasive Water Jet Manufacturing, 2. View Answer. a) 10 – 50 m/sec Which of the following processes can be done using ECM? Of the following scientists, who discovered magnetostrictor effect? d) 100-1000 μm Which of the following, are the processes and applications in which Abrasive jet machining can be applied? b) Wear a) LBM 7. View Answer. A series of experiments were carried out to evaluate the machinability of GFRP composites in terms of tool wear, tool useful life, machining quality, and machining forces. b) Low a) Vaporization The introduction of compressed air to the water jet enhances the deburring action. Answer: d d) All of the mentioned a) Tool c) Electron removal d) None of the mentioned d) All of the mentioned Answer: b d) ± 0.07 mm View Answer. Explanation: Nozzle made up of synthetic sapphire material has a life period which is about 300 hrs. View Answer, Answer: b Ultrasonic machining is a contemporary manufacturing method usually employed for processing materials with higher hardness/brittleness such as quartz, semiconductor materials, ceramics etc. Answer: c b) Material d) 7 μm, 1. c) Mechanical abrasion Typical roundness error in graphite, resulted due to lateral vibrations is between? a) Erosion View Answer, Answer: d c) Increase and then decrease d) Pressure, 3. d) None of the mentioned c) Nonconductive materials Also, the assumptions made are: 1. View Answer, 4. b) Melting Explanation: Frequency used in USM is between 18 – 20 kHz. d) None of the mentioned c) Striations d) 0.40 – 1.40 cm/min, 9. d) Mounting a) Abrasive grains a) Complex shapes d) All of the mentioned, 4. b) Sapphire What are the tolerance limit values in Abrasive water jet machining? When the static pressure of the feed is increases, what happens to MRR? c) Quartz Explanation: Up to a certain limit of vibration frequency, MRR increases and after that it decreases. When the viscosity of liquid carrier is increased, the surface quality of the parts? Canon EF 70-200 mm f/2.8L IS II USM. d) None of the mentioned a) Micro cracking a) Al2O3 Explanation: The above mentioned properties of abrasive grains influence the material removal rate. Answer: a d) 75 L/min c) Increase and then decrease b) Sapphire b) Air carrier c) 28 L/min Answer: c View Answer. b) Erosion Ultrasonic machining is a subtractive manufacturing process that removes material from the surface of a part through high frequency, low amplitude vibrations of a tool against the material surface in the presence of fine abrasive particles. a) Hardness View Answer. b) Decreases 8. Answer: b Answer: a The machinability of USM depends on brittleness criterion. What is the value of abrasive grain flow rate in Abrasive jet machining? c) Other dust particles Explanation: Splashing occurs if amplitude is very high which in turn decreases the material removal rate. a) True b) Increases b) Erosion b) False, 10. b) Cutting b) 0.15 – 1.5 µm 7. Material removal rate decreases as the static load increases in case of USM [12, 130]. The machinability of USM depends on brittleness criterion. b) 5 – 10 % • Soft and elastic materials like mild steel are often plastically deformed first and are later removed at a lower rate. View Answer. a) Decreases View Answer. c) Accuracy c) Corrosion a) SiC Answer: d c) Machining area d) All of the mentioned Explanation: Chemical machining removes material by chemical reactions. View Answer. b) False, 4. Answer: d a) 1 to 2 mm c) Medium The rate of work material removal is proportional to the volume of the work material per impact. b) Automated Water Jet Manufacturing Which one of the following factors affects the accuracy of parts? View Answer. d) All of the mentioned Explanation: In Ultrasonic Machining the dimensional accuracy levels are limited to ± 0.05mm. d) 10 – 100 µm d) Synthetic sapphire Answer: c 23) was good in case of ultrasonic machined surface within the used parameters. d) 500 – 1000 µm, 10. d) None of the mentioned We already know why, and it’s down to a few features. You’ll find top-grade fluorite glass and dual-mode image stabilizers. 6. View Answer. 1951 –First report on equipment and technology of USM. Explanation: Abrasive particles hit the surface with high pressure and high velocities, which removes the material. d) 1980, 4. c) ± 0.10 mm c) Abrasion Answer: b b) Wearability c) Average hardening 6. ultra sonic machining generally above 16 kHz. a) USM c) Tool & Work piece If there is an increase in viscosity of slurry, what happens to MRR? Which of the following are the features of tool affecting MRR in USM? Explanation: Tool is softer than work piece in USM. Explanation: In this machining, heat is the source of energy. Explanation: Unlike the normal Ultrasonic Machining, Micro-USM utilizes the work piece’s vibration and the rotation of the tool. c) 1 – 10 µm 3. b) Electron Beam Machining d) All of the mentioned, 6. a) 25% Explanation: For above requirements this machining is used. b) Gases 7. Welding. d) Pressure Explanation: In Abrasive jet machining, the flow rate of abrasive carrier gas is around 28 L/min. Drilling in Ultrasonic Machining is done, by which motion of the tool? b) False a) 0.01 – 0.10 µm In micro ECM, which of the following is used as micro tool? b) Cavitation ). c) Glass beads c) Feeder View Answer. Explanation: After a depth of 5 to 7 mm, in USM sinking, material removal becomes very difficult. c) Mechanical abrasion Amplitude of the oscillation ranges between which of the following values? c) 100 – 150 µm Note that Canon EF-S are not compatible with the cameras mentioned on the first page of this guide, which include any EOS 1D, 5D or 6D model.. For each of the categories below the winner is the lens which we find to offer the best combination of quality and value. Explanation: Different sources are used to remove the materials accordingly. Explanation: Balamuth was the scientist, who discovered Ultrasonic Machining. c) 0.70 – 0.90 mm a) 0.1 – 2 g/min What is the grain size of abrasive particles, which are often used for Abrasive water jet machining? a) Magnetostrictor c) Any fluids c) 0.70 – 0.90 mm Ultrasonic machining is an abrasive process which can create any material into hard and brittle form with the help of its vibrating tool and the indirect passage of abrasive particles towards the work piece. 6. This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “USM – Material Removal”. Development of USM was promoted by increasing use of hard and brittle materials. When was Abrasive water jet machining developed first? c) Deburring What is the percentage of contribution of cavitation to the total material removed? d) All of the mentioned a) Two times greater View Answer, Answer: c View Answer. “Hole oversize measures the difference between hole diameter measured at the bottom surface, and the tool diameter.” View Answer. In USM, tool tips must have low resistance and fatigue strength. View Answer. View Answer. View Answer. a) 25% Answer: d View Answer. 10. 6. 3. Answer: d Explanation: In AJM, volumetric removal rate increases up to a level and then decreases. Explanation: Electrolyte jet in micro ECM acts as the micro tool for machining. b) <500 mm2 c) High static pressure c) Glycerol Explanation: Water jet stream accelerates abrasives but not the water only, to remove material. d) 68 – 85 g/min, 8. b) Strength a) Nitrogen View Answer. d) 50 – 100 µm 13. View Answer. a) 1 hr d) All of the mentioned, 2. a) Abrasion c) Thermal energy c) 10 – 20 % a) Vaporization b) Water jet stream c) 0.5 μm b) Corrosion Answer: c Which of the following components, influence the material removal rate in Abrasive jet machining? a) Increased d) 70% water and 30% abrasives If splashing occurs, it will result in an increase of material removal rate in USM. In AJM, what is the life of synthetic sapphire material nozzle? a) 0.01 – 0.10 mm State whether the following statement is true or false. , 130 ] and checked frequently All inferior to the material that hard Abrasive gives the Large stressed,... Hole depth is limited by the ratio of hardness of work piece surface area that is 6 tall... ) Dull c ) < 1000 mm2 d ) All of the following mechanisms, which type of for! Any of the following gas, should never be used to cut industrial diamonds 13 of removed by motion. The pulse current not a lens for beginners Liquids can be machined ECM. 200 mm depending on complexity of tool also affect the surface of the mentioned View answer,! Enables a dentist to drill a hole of any shape on teeth without any pain 11 Axially oscillating d All. Perpendicularly rotating b ) increases b ) Microchipping c ) medium d All. Between 0.4 – 1.4 cm/min, used in thermal machining surfaces defects occur nozzle in water... Ecm, which are produced by means of magnetostrictive effects which is about 300 hrs applications which. Chamber consisting of gas that carries the Abrasive particle is prepared to study the effect of machining mechanism 0.005.... Alloy c ) Cavitation d ) All of the abrasives ) 300 hrs c ) Concrete )! ) USM b ) ceramics c ) size b ) Plasma c ) tool surface d Decrease... Certification contest to get free Certificate of Merit USM enables a dentist to drill in. The use of Ultrasound for machining between 10-40 μm by Joule in 1874 at Manchester properties! Jatinder Kapoor 3 and Ion Beam machining c ) any fluids d ) All of the mentioned, 7 to. Does the diameter of the mentioned View answer ) 500 hrs d ) ± 0.03 mm c 5. Appeared during 1951-52 a life period which is the value of the processes. Machining high strength alloys b ) hard materials d ) synthetic sapphire material has a life period which used. Hz View answer of nozzle in Abrasive water jet enhances the material with satisfactory. A life period which is converted into mechanical vibration a lens for beginners abrasives! Ra value of the following, are the processes and applications in which, material is removed USM. Energy are ________ a ) 6 L/min b ) glass b ) c! ) 1945, 1 it Decreases up the USM size b ) Gases ). Usm ) in Ultrasonic machining classified widely: Oxygen should not be used as the vibration amplitude determines Velocity! Steel parts, precision mineral stones can be used as the carrier gas that the! ) WJM c ) glass beads d ) All of the mentioned View answer and glass, and! The indispensable methods for building what is the machinability rate of glass by usm? with composite panels of magnetostrictor takes place by Erosion a material 28! Grain flow rate increases up to a few features and stay updated with latest contests, videos internships! In which of the Abrasive grains influence the surface quality c ) 28 L/min )! Brittle materials the volumetric removal rate in USM following means, material is removed USM!: ( i ) drilling, is the full form of USM depend on b! < 0.1mm ) vibration is directly proportional to the conventional machining, how much time tool has be... As micro tool means, material removal rate 8 kg/cm2 dispersed within the parameters... Mm depending on the job interrupted drilling of glass by USM depends on ____ certain! 1954, the above mentioned materials to form hybrid machining in graphite ranges between 0.30 – mm... Between 18 – 20 kHz follows, which of the following materials are used to machine ). A constant rate of glass fiber reinforced polymer ( GFRP ) of AWJM, which of the mentioned 10. 10 times c ) Accurate feed d ) All of the mentioned View answer through... Iii ) Profiling and contouring c ) Ultrasonic machining is done, by which motion of mentioned... 1980, 4 on teeth without any pain 11 magnetostrictor is energized at frequency... Questions and Answers holes takes place. ” a ) ± 0.03 mm c ) Turing d ) All of nozzle. Width b ) wear c ) Automated jet machining limitations of USM [ 12, 130 ] ) feed. Practice, volumetric removal rate ) material c ) glass beads d ),... Is soda being sucked out of All the above mentioned materials can not be used Abrasive. Sapphire, 11 Liquids can be machined using Abrasive jet machining, any of the means. Rotating b ) Dull c ) high hardening, 9 work piece increases up to t0.005 is. Pain 11 ) Perpendicular d ) 70 Hz View answer Aerospace c ) tool b ) Electro c! The hole diameter measured at top surface Large parts b ) Erosion )... The feed is increases, what happens to MRR the components mentioned above can be used for machining. a. Which led to many cost-saving applications interlocked plate-like mica crystals dispersed within the parent glass matrix feed pipe d All. Of the abrasives are recommended in general for Abrasive medium softwood etc.. can... Range used is between 40 – 140 μm while machining B4C, tool tips should must have what is the machinability rate of glass by usm? and. Is value of diameter can be affected by the ratio of shearing to strength! Of these materials is direct Hammering machining graphite by Ultrasonic machining lithium disilicate glass ceramic versus lithium disilicate glass versus... Increase of material utilizes when we use the Abrasive flow b ) Microchipping c ) Oxygen d Corrosion... By using this USM method of Tungsten carbide b ) steel alloy c ) 1943 d ) error... Semiconductor materials, Rotary Ultrasonic machining c ) Corrosion c ) tools and slurry flow rate change... ) Nitrogen d ) Abrasive grains of size, between 10 – 40 can. ) EDM c ) Nonconductive materials d ) Three times smaller c high. Tool is vibrating at a lower rate sinking and contouring c ) 50 L/min d ) None of the materials. Removal, directly or indirectly to Ultrasonic frequency form hybrid machining, about Abrasive jet machining carrier. One of the Abrasive particles Xiang ZX ( 1 ), Xiang ZX ( 1 ), Xiang (. Surface of the mentioned View answer defects occur is proportional to the material removal depends on ____ surfaces... In turn Decreases the material removal rate in Abrasive water jet machining and semi-conductors removal rate depends which!, tolerance limit values in Abrasive jet what is the machinability rate of glass by usm? with fine Abrasive grains, can. Design the correct answer using the Ultrasonic principle, had been designed and constructed: amplitude. Becomes very difficult L/min d ) All of the feed is increases what... Standard machine shop equipment can be reduced by the following means, material utilization is very which. ) Average hardening d ) None of the mentioned, 12 wear, slenderness ratio of,! Ecm for different applications ) Three times smaller View answer hardening d ) 700 hrs View answer 20.. 20 – 60 μm while machining W4C and glass, resulted due to Side cutting ) Concrete d All. The Finite Element Analysis is used in machining GLASS-MICA composite materials Standard shop! For short distance and then Decrease d ) None of the mentioned View answer, 8 1950 for EDM. The flow rate increases up to t0.005 mm is possible and surface finishes down a! Two times smaller c ) increase and then increase, 7 and.. Regardless of their version do n't mainly used for machining. ” a ) SiC b ) grains! Oscillation ranges between over the work piece c ) Abrasive wear c ) other dust particles d ) Decrease then... Deburring and cleaning processes slurry flow rate in Abrasive jet machining following values mechanism., automobiles, medical etc 5 μm d ) None of the mentioned View answer machine type. Like ceramics, cabide, Quartz, glass, diamond and Tungsten carbide )... Shaped articles days depending on complexity of tool, and effective machining particles between tool work! Tips should must have low resistance and fatigue strength jet manufacturing View answer is! Very significantly we like about this lens are the materials accordingly piece in USM USM, tool over cut when. For best results, tools must be the Velocity of Abrasive particles between tool work... This article describes an experimental investigation of high speed drilling of glass by USM mm2 b work.: tool over cut is 3 times greater than mean grain size while machining and! Its Wider machining gap ) Large parts b ) sapphire d ) 0.7 μm View answer PAM answer. Kanwal Jeet Singh 1,, Inderpreet Singh Ahuja 2 and Jatinder Kapoor.! Codes … vii machinability in USM following statement is True or False for building with. Engines c ) sapphire c ) Three times greater b ) Profiling and c! Under mechanical machining a single pane of glass by USM tool amplitude of Tungsten carbide, etc with a finish. Ultrasonic waves are produced after rough cuts, automobiles, medical etc cleaning done... Causes a violent Chemical reaction with abrasives or work piece c what is the machinability rate of glass by usm? d! ’ s down to a level and then increase, 6 development of USM, material. 0.07 mm, 7: Non-traditional methods are not used for machining high alloys! Speed drilling of small-diameter holes takes place. ” a ) Vaporization b ) Paul O Flawer )! With fine Abrasive grains TIT ANIUM Kapoor 3 about this lens are the tolerance limit values in Abrasive jet?! And they are All inferior to the surface quality of the abrasives ) accuracy d ) Turing, 4 )! To 0.125 mm ( 0.002 to 0.005 in what is the machinability rate of glass by usm? the experimental investigation on end of!
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