(Ans:a) The positive ions moves towards the tool (cathode) and negative ions move towards the workpiece. 9 In this idealized model, a cutting tool moves to the left along the workpiece at a constant velocity V, and a depth of cut to. This abrasive particle strikes to the work piece and remove metal form it. Horn which is also known as tool holder, transfer this amplified vibration to tool which makes tool vibrate at ultrasonic frequency. 1. In ultrasonic machining, a liquid filled with abrasive material flows through over the work piece, and the work tool vibrates against the abrasives. 05, 0.5 c. 10,000°C The range of obtainable shapes can be increased by moving the workpiece during cutting. d. 14,000°C Using abrasive slurry between the tool and work. In ultrasonic machining, tool is made of. 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.. A. The particles used in the abrasive fluid are usually boron carbide or silicon carbide as they are rigid than others. The simplicity of the process makes it economical for a wide range of applications such as: 1. Direct contact of tool with the work C. Maintaining an electrolyte between the work and tool in a very small gap between the two D. Erosion caused by rapidly recurring spark discharges between the tool and work Answer: Option A a. i. In Electrical discharge machining, the temperature developed is of the order of – Idea choice for ceramic matrix composites, glass, quartz, diamonds, PCD, etc. 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 the surf… 2. d. The size of impression on work piece is exactly the same as that on electrode (tool). By 1954, the machine tools, using the ultrasonic principle, had been designed and constructed. The smaller the grain size smoother the surface obtained, but it reduces material removal rate. 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Most grinding processes involve a work tool making direct contact with a work piece in order to gouge material away. 6,000°C – Machining ceramics, carbides, glass, precious stones, and hardened steels, – Create microelectromechanical system components such as micro-structured glass wafers, – Manufacture parts with high precision and tolerance. a. d. none of these Machining glass, ceramic, tungsten and other hard carbide, gemstones such as synthetic ruby. Ultrasonic machining is a loose abrasive machining process that requires a very low force applied to the abrasive grain, which leads to reduced material requirements and minimal to no damage to the surface. In ultrasonic machining, the tool moves vertically or orthogonal to the surface of the part and fluctuate at the ultrasonic frequencies, the vibrations generated by the tool will project micro-sized abrasive particles to the part at a high speed, the particles mix with water or other liquids to form a slurry, which flowing between tool and workpiece, helps to grind away material from the surface of the piece. d. Electro-chemical etching takes place 4. Clipping is a handy way to collect important slides you want to go back to later. If you continue browsing the site, you agree to the use of cookies on this website. 2,000°C 6. B. It differs from most other machining operations because very little heat is produced. The Electrical Discharge machining (EDM) process is Ultrasonic Machining PPT with PDF Seminar Report: Ultrasonic machining is a mechanical material removal process that uses formed tools, vibration of high frequency and abrasive slurry mix.It works on a frequency of more than 20000 Hz. See our User Agreement and Privacy Policy. C. Diamond. The motion of the tool takes place vertically or orthogonal to the surface of the part. The process involves an abrasive slurry that runs between the tool and the work piece. c. 005, 0.05 The tool is vibrating at high frequency and low amplitude in … See our Privacy Policy and User Agreement for details. Machining and Thermal aspects (MGU S8 ME), No public clipboards found for this slide. They get scattered 1. Edit. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Some light oil like transformer oil or kerosene oil is used as dielectric. If you continue browsing the site, you agree to the use of cookies on this website. 3. (function ($) { 4. Erosion takes place both on Work piece and the tool. Brass or copper. It is very useful for materials that are brittle and sensitive. This is the whole working process of ultrasonic machining. Ultrasonic machining is a method of grinding that uses an abrasive liquid rather than direct tool contact. ii. In Electron beam machining, workpiece is held in 7. Answer: Option B . A distinction is made between all-purpose and specialized ultrasonic machine tools. In ultrasonic machining processes, a formed tool made of ductile and tough material, having the shape of the cavity to be machined is made to vibrate against the workpiece surface, and between the two, continuous flow of slurry of abrasive particles is maintained. Between the tool and workpiece, the machining zone is ooded with hard abrasive particles generally in the form of a water based slurry. b. Tool moves downward from it m ean position which . Ultrasonic Machining (USM) and Ultrasonic Machining Tool: The use of ultrasonics in machining was first proposed by L. Balamuth in 1945. USM Machining accuracy and surface finish 1. During the operation, the tool and the ultrasonic machining part never interact with each other. movement of the tool produces a chip which moves up the face of the tool. With a number of manufacturing methods, manufacturers often want to find the best way for the specific project. 5 to 5 Which of the following is not true in case of Electrical discharge machining (EDM)? While the tool moves, a slurry flows between it and the workpiece. 21.3a. Subscribe Subscribed ... by up to 40 % in comparison to conventional machining. The first report on the equipment and technology appeared during 1951-52. It also does not need to change the temperature. Looks like you’ve clipped this slide to already. Ultrasonic machining (USM) also known as ultrasonic grinding (USG) is a unique non-traditional manufacturing process in which material is removed from the surface of workpiece by using the axially oscillating tool. Ultrasonic Machining . Ultrasonic machining is a contemporary manufacturing method usually employed for processing materials with higher hardness/brittleness such as quartz, semiconductor materials, ceramics etc. Which the following is true for Electrical Discharge machining (EDM)? Despite all this, ultrasonic machining also has some shortcomings. In this article, let’s take an overview of the ultrasonic machining process, covering its working principle, tools, advantages, disadvantages, and application. In Electron beam machining, as the electrons strikes the work piece As the potential difference is applied across the electrode, the movement of ions starts in between the tool and w/p. b. c. Direct contact machining Unconventional Machining Process Objective TYpe Questions. d. ii & iii 1. D. Stainless steel. The tool oscillates with small amplitude of … In ultrasonic machining, the metal is removed by. (Ans:a) Language. It is also known as Ultrasonic impact grinding is an operation that involves a vibrating tool fluctuating the ultrasonic frequencies in order to remove the material from the work piece. The transducer converts the ultrasonic frequency oscillation into an ultrasonic mechanical vibration. There is no heat generation in the ultrasonic machining process, so the workpiece will not deform and the physical properties of the part will remain uniform. b. Ultrasonic machining is a nontraditional process. … 2. The ultrasonic generator converts the power frequency AC power into an ultrasonic frequency oscillation with a certain power output. d. Capable of producing sharp corners The controlled microscopic oscillation added to the tool reduces friction to reduce cutting force, increasing the life and effectiveness of the tool. The tool is usually made from materials such as soft steels and nickel. 3. touches grain. Solution(By Examveda Team) The tool material should be such that indentation by the abrasive grits does not lead to brittle failure. a. vacuum chamber Ultrasonic machining, also known as ultrasonic impact grinding, is a machining operation in which an abrasive slurry freely flows between the workpiece and a vibrating tool. Due to this, the tool and the work piece never interact with each other. 5. (Ans:c) A higher amplitude is obtained by using a tool with a high transformation ratio, i.e. b. i &ii 2. 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. Tungsten carbide. Generally the tool is pressed downward with a feed force. b. Their kinetic energy is converted into heat a machining unit for shaping various solid materials. (Ans:d) In ultrasonic machining, a tool of desired shape vibrates at an ultra-sonic frequency (19 - 25 kHz) with an amplitude of around 15 - 50 m over the workpiece. })(jQuery); Junying Metal Manufacturing has developed high-level manufacturing technique in When very frequency vibrations are applied on to the tool, the tool is vibrating at a very high frequency. Grain material and size: The abrasive material should be at least hard as the workpiece material, it should not erode itself during ultrasonic machining. iii. Match List-I (Machining process) with List-II (Associated medium) and select the correct answer using the codes … 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. a. Ultrasonic Machining b. The amplitude, ξ, of the ultrasonic tool before machining can be measured by using either an accelerometer , an eddy current probe 30, 85, a laser dopplermeter or laser speckle pattern interferometer . 2. It is capable of removing materials from almost all types of materials, whether strong or brittle parts, such as ceramic. b. dielectric medium a. Burr free Only i In Ultrasonic machining, the tool moves a. moves in transverse direction b. moves in longitudinal direction c. vibrates in transverse direction d. vibrates in longitudinal direction (Ans:d) 33. 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). Ultrasonic refers to waves of high frequency above the audible range of 20 kHz. Not for hard metals The force of tool varies as it moves down. The piezo-driven ultrasonic tooling system moves the diamond tool in a linear oscillatory motion with a unique frequency of 100 000 Hz, whereby the tool life is extended by orders of magnitude. Ultrasonic machining (USM) of materials Ultrasonic machining is an economically viable operation by which a hole or a cavity can be pierced in hard and brittle materials, whether electric conductive or not, using an axially oscillating tool. The Impact force arising out of the vibration of the tool end and the flow of abrasive slurry causing thousand of microscopic grains to … As the tool vibrates it is pressed on the work surface with light force and allowing the abrasive slurry to flow through between tool-workpiece interface. d. 0005, 0.005 B. Now customize the name of a clipboard to store your clips. Also Read: Ultrasonic Machining (USM) – Main Parts, Working Principle, Advantages and Disadvantages with Application • Then the tool slows down its speed … Speed up all the machining jobs with ultrasonic tools. The metal removal takes place due to erosion (Ans:c) c. Mechanical erosion in work piece takes place c. The electrode (tool) is made of graphite or copper. Although manufacturing technologies are well developed for materials like metals and their alloys, considerable problems still exist in the fabrication of hard and brittle materials including ceramics and glass. You can change your ad preferences anytime. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 1. Gap between tool and work piece is controlled by servo mechanism. Ultrasonic machining, also known as ultrasonic vibration machining, is a subtractive manufacturing process that utilizes an ultrasonic tool to remove excess material from a workpiece through high frequency, low amplitude vibrations with fine abrasive particles. a. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. For hard metals c. direct contact machining d. Capable of removing materials from almost all of. Grinding that uses an abrasive liquid rather than direct tool contact moving the workpiece CNC,... Cutting force, increasing the life and effectiveness of the following is true! Because very little heat is produced personalize ads and to provide you with relevant advertising was. B. i & ii c. i, ii & iii d. ii & d.... Store your clips 05, 0.5 c. 005, 0.05 d. 0005, 0.005 ( Ans c. Of grinding that uses an abrasive slurry that runs between the tool and work piece a order gouge! Amplitude in … in ultrasonic machining also has some shortcomings makes tool vibrate at ultrasonic.... Gap between tool and the work piece and the work piece never interact with each other machining tool the! ) the tool is made of graphite or copper if you continue browsing the site, you to! Metal is removed by site, you agree to the work piece and remove metal form.. Existing machines is applied across the electrode, the tool such as soft steels and nickel moves downward it! Cathode ) and ultrasonic machining ( USM ) and negative ions move towards workpiece. Piece takes place both on work piece takes place ( Ans: c ).... Of it is represented in Fig ultrasonic mechanical vibration discharge machining ( EDM ), public! Compact design, the UTS2 can easily be integrated into any commercially available precision and ultra-precision machine rigid... Ceramics etc cavity produced oil like transformer oil or kerosene oil is as! Burr free b impression on work piece in order to gouge material away fluid are usually boron carbide silicon! Is a contemporary manufacturing method usually employed for processing materials with higher hardness/brittleness such as quartz semiconductor. The in ultrasonic machining, the tool moves converts the ultrasonic frequency oscillation into an ultrasonic machine tools in the abrasive fluid are boron... All-Purpose and specialized ultrasonic machine tools, No public clipboards found for this slide obtained, but reduces. Of tool varies as it moves down the force of tool varies as it down! Ultrasonic frequency, as the tool and the work piece and the piece! Place d. Electro-chemical etching takes place ( Ans: c ) 4 of it Capable! Machining ( EDM ) process is a. Burr free b remove metal form.! In Electrical discharge machining ( EDM ) the transducer converts the ultrasonic frequency oscillation into an ultrasonic machine,. Used in the abrasive slurry that runs between the tool and the work piece never interact each. The metal is removed by ultra-precision machine processes involve a work piece never with... Machining tool: the use of cookies on this website for hard metals direct... It economical for a wide range of 20 kHz abrasive particle strikes to the work piece in order to material. Removed by is the whole working process of ultrasonic machining tool: use. 0005, 0.005 ( Ans: c ) 2 an abrasive slurry that runs between the is! Tool material should be such that indentation by the abrasive grits does not lead long..., diamonds, PCD, etc to analyze this process in detail a... Applied on to the use of ultrasonics in machining operations because very heat. Moves downward from it m ean position which obtainable shapes can be increased by moving the during! Feed force flows between it and the tool, ultrasonic machining also has some shortcomings the simplicity of part. Or silicon carbide as they are rigid than others User Agreement for details piece a machining process is... To a tool and the ultrasonic frequency oscillation into an ultrasonic mechanical vibration want find... Microscopic oscillation added to the surface of the part to personalize ads and to you. Types of materials, ceramics etc are applied on to the tool,. Machining zone is ooded with hard abrasive particles in a slurry flows between it the! Removed by ii c. i, ii & iii d. ii & iii ii... 0.5 c. 005, 0.05 d. 0005, 0.005 ( Ans: a ) improve functionality and performance, to! The work piece and remove metal form it life and effectiveness of the machining is... The specific project vertically or orthogonal to the tool takes place d. Electro-chemical etching takes place Ans... Into any commercially available precision and ultra-precision machine ) 6 are brittle and.. Very little heat is produced a number of manufacturing methods, such as CNC turning, milling, and.!, ceramics etc ceramics etc lead to brittle failure materials, whether strong or brittle,... Usually made from materials such as quartz, diamonds, PCD, etc tool contact an. Manufacturing method usually employed for processing materials with higher hardness/brittleness such as CNC turning, milling, to. Is removed by waves of high frequency above the audible range of obtainable can. ) the tool and work piece never interact with each other in work piece a slide already... Parts, such as quartz, semiconductor materials, ceramics etc the life and of... The life and effectiveness of the tool and the ultrasonic principle, been! Particles generally in the form of a metals c. direct contact with a work piece never interact with each.. From materials such as soft steels and nickel can easily be integrated into any commercially available precision ultra-precision! A distinction is made between all-purpose and specialized ultrasonic machine tool, ultrasonic machining ( EDM ) can machined... Tool ) is made between all-purpose and specialized ultrasonic machine tools, using the ultrasonic is. Go back to later towards the workpiece during cutting the transducer converts the ultrasonic machining, metal... Makes tool vibrate at this high frequency and low amplitude in … in ultrasonic machining as that of produced. Added to the work piece and remove metal form it holes and of... Force, increasing the life and effectiveness of the following is not same as that on electrode ( tool is... Matrix composites, glass, ceramic, tungsten and other hard carbide, gemstones such as soft and! Process in detail, a 2-D model of it is represented in Fig to back. Size of impression on work piece and remove metal form it metal removal takes place both on work and... Use your LinkedIn profile and activity data to personalize ads and to provide you with relevant advertising little. Find the best way for the specific project that on electrode ( tool ), tool is made of or... With the abrasive fluid are usually boron carbide or silicon carbide as they are rigid than others little! C ) 2 by using a tool can fit in any of existing... In machining operations like drilling, grinding, profiling and milling operations on all materials both conducting non-conducting! Brittle parts, such as ceramic machining ( EDM ) workpiece during cutting of cookies on this.... All materials both conducting and non-conducting cycle and high production cost from materials such as ceramic with the grits!, ceramic, tungsten and other hard carbide, gemstones such as CNC turning, milling, and provide! For materials that are brittle and sensitive of high frequency and low in., semiconductor materials, ceramics etc 6,000°c c. 10,000°C d. 14,000°C ( Ans a! Process has unique benefits S8 ME ), the temperature developed is of the design! Which a tool with a number of manufacturing methods, such as steels! Best way for the specific project composites, glass, quartz, diamonds, PCD, etc is... To be processed will affect the selection of the process involves an abrasive liquid rather than direct tool contact …! Distinction is made between all-purpose and specialized ultrasonic machine tools, using the ultrasonic frequency oscillation into an ultrasonic vibration! Tool holder, transfer this amplified vibration to tool which makes tool vibrate ultrasonic! Place ( Ans: c ) 4 easily be integrated into any commercially available precision and ultra-precision machine model! Material away, gemstones such as ceramic across the electrode ( tool ) this! Gouge material away get scattered c. mechanical erosion in work piece and remove metal form it light oil transformer... The surface of the part this high frequency and low amplitude in … in ultrasonic machining tool... Strong or brittle parts, such as ceramic in ultrasonic machining process has unique benefits d. Electro-chemical takes! That are brittle and sensitive oil is used as dielectric conducting and non-conducting, etc. To analyze this process in detail, a 2-D model of it very... Iii ( Ans: c ) 2, ceramic, tungsten and other hard carbide gemstones! It also does not need to change the temperature developed is of the is... Gap is kept between ___mm to___mm on work piece and remove metal it. Downward with a work tool making direct contact machining d. Capable of producing sharp corners ( Ans: ). Abrasive particles generally in the form of a is obtained by using a tool can in. Reduces friction to reduce cutting force, increasing the life and effectiveness of following... In machining was first proposed by L. Balamuth in 1945 slides you want find! Order to gouge material away water based slurry: a ) 6 range of obtainable shapes can be increased moving! But it reduces material removal rate made from materials such as ceramic and milling operations on all materials conducting... Obtainable shapes can be machined by this method is vibrating at a very high frequency ( )... Kerosene oil is used as dielectric most grinding processes involve a work tool making direct machining!
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