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The attachment is standard or special auxiliary devices intended to be fastened to or joined with one or more components of the milling...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/milling-machine-attachment-accessories/" aria-label="View Post: 10 Types Of Milling Machine accessories and Attachments">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"10 Types Of Milling Machine accessories and Attachments","url":"\/\/www.gunkrazy.com\/milling-machine-attachment-accessories\/","articleBody":"10 Types Of Milling Machine accessories and Attachments\r\nThe attachment is standard or special auxiliary devices intended to be fastened to or joined with one or more components of the milling machine. These devices increase the capability of milling machine. One machine can perform number of operation by using various types of attachments. The following are the different type of attachments used on standard or column and knee type milling machines.\r\n\u00a0\r\nMilling Machine Attachments\r\nTypes of Attachments\r\nStandard Attachments\r\nThese types of attachments have greater adaptability and application in general type of work. They are capable of dealing with a large variety of jobs and can be fitted to most of the standard types of milling machines. These are used for the following purposes:\r\n(a) To hold the cutters. Arbors, Collets, Adaptors, etc.\r\n(b) To hold the workpiece. To hold the work piece on the table, in a desirous position, and impart additional movements, if required; such as vices, circular table, indexing head, tail stock, etc.\r\n(c) To act as auxiliary spindles. Attachment used In conjunction with the main spindle, in order to avoid the necessity of various special types of machines; such as vertical milling attachment, spiral milling attachment, slotting attachment, etc.\r\n\r\nSpecial Attachment\r\nSpecial attachments are those which are specially designed and used on a standard milling machine to make it suitable for performing special milling operations in mass production of identical items. These attachments mainly include the various milling fixtures.\r\n\r\nVertical Milling Attachment\r\nA vertical attachment can convert a horizontal milling machine into a vertical milling machine by orienting the cutting spindle axis from horizontal to vertical for performing specific operations. It consists of a right angle gearbox, which is attached to the nose of the horizontal milling spindle by bolting it on to the column face. It can accommodate cutters like end mills, face mills, T-slot cutters.\r\n\u00a0\r\nUniversal \u00a0 Milling \u00a0 Attachment\r\nIt is same like vertical \u00a0 \u00a0 milling attachment but has swivelling adjustments so that its spindle may be set at any angle. It is mounted on the column and gets drive from the main spindle of the machine. The spindle speed is faster than the regular spindle by 1 \u00bd times to 3 \u00bd times. Its advantages are the spindle can set at any angle to mill angular strips; table ways etc. angular and end mills may be used to carry out the operations.\r\n\r\nSlotting Attachment\r\nAn attachment converts the rotary motion of the spindle into the reciprocating motion of ram by means of an eccentric or crank housed within the attachment. It is bolted on the face of the column and can also be at an angle for machining angular surfaces. The length of stroke can also be adjusted, usually ranges from 2\u201d- 3\u201d.\r\n\r\nHigh-speed Attachment\r\nThe attachment consists of a gearing arrangement enclosed within it\u2019s casting to increase the regular spindle speeds by 4-6 times. This is for operating the smaller diameter of cutters efficiently and at the proper cutting speed.\r\n\r\nUniversal Spiral Milling Attachment\r\nThe universal spiral attachment may be used in plain milling machine or in universal milling machine for cutting a spiral grooves on a cylindrical work piece. The attachment is bolted on the face of the column and its spindle head may be swivelled in a vertical or horizontal plane. While using on a plain milling machine the cutter mounted on the attachment may be swivelled to the required helix angle for cutting spiral having angle more than 45 deg.\r\n\r\nRack Milling Attachment\r\nA rack milling attachment is bolted to the face of the column and is used for cutting rack teeth on a job mounted on the table. The attachment consisting of a gear train enables the spindle axis to be oriented at right angles to the machine spindle in a horizontal plane. The successive rack teeth are cut by using a rack indexing attachment. The slanted rack teeth or a skew rack may be machined when the attachment is mounted on a universal milling machine where the table may be swivelled to the required helix angle.\r\n\r\nRotary Table Attachment\r\nA rotary attachment is used on a variety of circular slots or some contours on die making jobs. They are manually operated and some take the drive from the lead screw for automatic functioning.\r\n\r\nDividing Head Attachment\r\nThis is also a special work holding device, which is bolted on the machine table. The work may be mounted on a chuck fitted on the dividing head spindle or may be supported between a live and a dead centre. The dead centre is mounted on a foot stock as in a lathe tailstock that is bolted on the machine table after correctly aligning its spindle axis with the dividing head spindle. The attachment is principally used for dividing the periphery of a work piece in equal number of division for machining equally. This attachment is used both as horizontal and vertical dividing chuck.\r\n\r\nUniversal Indexing Head\r\n\r\nThe universal indexing head is the most common type of indexing arrangement used in workshops. It can be used to execute all forms of indexing.","headline":"10 Types Of Milling Machine accessories and Attachments","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2017-07-31","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2017\/07\/MillingMachineAttachments2-300x188.jpg","height":188,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/clutch-plate-materia/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2017/07/materialusedforclutchplates-300x294.png')"></div><span class="sr-only">link to Material used for making Automobile clutch plates and Why</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/clutch-plate-materia/">Material used for making Automobile clutch plates and Why</a></p></header><div class="excerpt"><p>Material used for making Automobile clutch plates and Why
Properties Should Consist in Material used for Clutch Plates are:   Static friction coefficient, which describes how well a clutch...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/clutch-plate-materia/" aria-label="View Post: Material used for making Automobile clutch plates and Why">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Material used for making Automobile clutch plates and Why","url":"\/\/www.gunkrazy.com\/clutch-plate-materia\/","articleBody":"Material used for making Automobile clutch plates and Why\r\nProperties Should Consist in Material used for Clutch Plates are:\u00a0\r\n\r\n\r\n \tStatic friction coefficient, which describes how well a clutch disc will hold onto a flywheel under acceleration. If the coefficient is low, the clutch disc will slip against the flywheel, get hot, and wear away.\r\n \tDynamic friction coefficient, which describes how smoothly (or abruptly) a clutch disc will 'grab' a flywheel during engagement. If the coefficient is too high, the clutch will grab immediately, leading to uncomfortable shifts that make low-speed manuevering very difficult (a key concern for truck clutch discs).\r\n \tClamping force, which is the amount of force or \"weight\" that must be applied to a given clutch disc to make sure it doesn't slip against the flywheel. The more force applied, the more pedal effort for the driver, the greater the load on the hydraulic system, etc.\r\n \tFade temperature, which is the temperature at which the clutch material begins to lose cohesion. If the temperature is too low, an afternoon spent towing the family boat (or at the local drag strip) can ruin the clutch disc.\r\n\r\n\r\n\r\nMaterial used for making Automobile clutch plates\r\n\r\n\r\n\r\n\r\nThere are five different materials utilized in modern clutch design:\r\n\"Organic\" clutch material, which is a mix of fiberglass and other materials (including brass in some cases) molded or woven into a friction pad\r\nKevlar (and it's cousin Twaron), which are synthetic fibers that make for extremely long-lasting (and very forgiving) clutch friction pads\r\nCeramic clutch material, which is mostly a mix of silicon dioxide and various metals and additives, sintered or brazed onto the clutch disc\r\nFeramic clutch material, which is fairly similar to ceramic material, except containing a much larger percentage of metal\r\nFeramAlloy, which is a new and superior alternative to feramic and ceramic clutch material\r\n\r\n\r\nCeramic and feramic clutch disc materials are used in racing or on vehicles with large amounts of torque (commercial trucks, farm vehicles, even 3\/4 and 1-ton diesel trucks, if they've been sufficiently modified). A new material called FeramAlloy will likely replace ceramic and feramic clutch materials, as it offers the same key benefits (high static friction coefficient, high fade temp), but with a much lower dynamic friction coefficient that makes shifts much smoother.","headline":"Material used for making Automobile clutch plates and Why","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2017-07-31","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2017\/07\/materialusedforclutchplates-300x294.png","height":294,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/vacuum-thermoforming-advantages-and/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2017/07/exampleworkingofvaccumformingprocesses-300x98.jpg')"></div><span class="sr-only">link to Vacuum Thermoforming | Advantages and Disadvantages</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/vacuum-thermoforming-advantages-and/">Vacuum Thermoforming | Advantages and Disadvantages</a></p></header><div class="excerpt"><p>Vacuum Thermoforming  For Plastic Sheets | Advantages and Disadvantages
Thermoforming:  Thermoforming is a plastic manufacturing process in which the thermoplastic sheets are formed with the...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/vacuum-thermoforming-advantages-and/" aria-label="View Post: Vacuum Thermoforming | Advantages and Disadvantages">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Vacuum Thermoforming | Advantages and Disadvantages","url":"\/\/www.gunkrazy.com\/vacuum-thermoforming-advantages-and\/","articleBody":"Vacuum Thermoforming \u00a0For Plastic Sheets | Advantages and Disadvantages\r\nThermoforming:\r\n\r\nThermoforming is a plastic manufacturing process in which the thermoplastic sheets are formed with the application of heat and pressure in a mold. The thermoplastic sheet is held horizontally over a mold surface and clamped with a holding device. The sheet is heated up to predetermined temperature using a heating element called heater. The thermostat is used to maintain the temperature of the heater. When the temperature becomes substantially high in the mold, the temperature is controlled by adjusting the heater and providing the cooling air. The thermoplastic sheet softens with the application of heat and is pressed into or stretched over the mold surface by application of air pressure or by any other means. The softened sheet conforms to the mold shape and it is held in place until it cools. The mold cavity is opened and the thermoformed part is released. Some of the plastic materials require air cooling in order to make those rigid quickly, because plastic materials have low thermal conductivity. The excess material is then trimmed out from the formed part. Excess material can be reground, mixed with unused plastic, and again reformed into thermoplastic sheets. Thin sheet (up to 1.5 mm) and thick sheet (about 3 mm) can be formed easily.\r\n\r\n\r\n\r\nVacuum Forming\r\nIn this process, the vacuum pressure is used to form the heated thermoplastic sheet into the desired shape. The thermoplastic sheet is placed on the mold surface and fixed with the help of clamping unit. The sheet is heated until it is softens and thereafter vacuum needs to be applied quickly. A surge tank is used to quickly pull the air out between the mold cavity and the sheet. When the vacuum is created, the sheet conforms to the shape of the mold cavity. The formed part is cooled and then ejected from the mold cavity. The schematic of vacuum forming process is shown in figure .\r\n\r\n\r\nApplications\r\nThermoforming process is used for variety of applications, for example, food packaging, automotive parts, trays, building products and aircraft windscreens. Thick gauge parts are used as cosmetic surfaces on permanent structures such as trucks, medical equipment, material handling equipment, electrical and electronic equipment, spas and shower enclosures, vehicle door and dash panels, refrigerator liners, utility vehicle beds, and plastic pallets. Thin gauge parts are primarily used to package or contain a food item, disposable cups, containers, lids, blisters and clamshells.\r\n\r\nexample working of vaccum forming processes\r\n\r\n\r\n\r\n\r\n\r\n\u00a0Advantages of Vacuum Thermoforming:\r\n\r\n\r\n\r\n\r\n \tExtremely adaptive to design requirement\r\n \tRapid prototype development\r\n \tLow initial setup costs\r\n \tLow production costs\r\n\r\n\r\nDisadvantages of thermoforming:\r\n\r\n\r\n\r\n \tPoor surface finish\r\n \tParts may have non-uniform wall thickness.\r\n \tAll parts need to be trimmed\r\n \tRibs and bosses cannot be molded easily\r\n \tLimited number of materials can be used\r\n \tVery thick plastic sheets can\u2019t be formed","headline":"Vacuum Thermoforming | Advantages and Disadvantages","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2017-07-30","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2017\/07\/exampleworkingofvaccumformingprocesses-300x98.jpg","height":98,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/laser-beam-welding-process-principle/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2017/07/laserbeamweldingprocessdiagram-300x147.jpg')"></div><span class="sr-only">link to Laser Beam Welding Process &#8211; Principle, Advantages , Disadvantages</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/laser-beam-welding-process-principle/">Laser Beam Welding Process &#8211; Principle, Advantages , Disadvantages</a></p></header><div class="excerpt"><p>Laser Beam Welding Process - Principle, Advantages , Disadvantages  Principles:
Laser is an acronym for light amplification by stimulated emission of radiation. Laser Beam Welding (LBW) is a...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/laser-beam-welding-process-principle/" aria-label="View Post: Laser Beam Welding Process &#8211; Principle, Advantages , Disadvantages">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Laser Beam Welding Process &#8211; Principle, Advantages , Disadvantages","url":"\/\/www.gunkrazy.com\/laser-beam-welding-process-principle\/","articleBody":"Laser Beam Welding Process - Principle, Advantages , Disadvantages\r\n\r\nPrinciples:\r\nLaser is an acronym for light amplification by stimulated emission of radiation. Laser Beam Welding (LBW) is a fusion joining process that produces coalescence of materials with the heat\u00a0obtained from a concentrated beam of coherent, monochromatic light impinging on the joint to be\u00a0welded. In the LBM process, the laser beam is directed by flat optical elements, such as mirrors and\u00a0then focused to a small spot (for high power density) at the workpiece using either reflective\u00a0focusing elements or lenses. It is a non-contact process, requiring no pressure to be applied. Inert\u00a0gas shielding is generally employed to prevent oxidation of the molten puddle and filler metals may\u00a0be occasionally used. The Lasers which are predominantly being used for industrial material\u00a0processing and welding tasks are the Nd-YAG laser and 1.06 \u03bcm wavelength CO2 laser, with the\u00a0active elements most commonly employed in these two varieties of lasers being the neodymium\u00a0(Nd) ion and the CO2 molecules respectively.\r\n\r\n\r\n Laser Beam Welding Process diagram\r\n\r\n\r\nLaser Types:\r\nSolid-State laser:\r\nIt utilizes an impurity in a host material as the active medium. Thus, the neodymium ion (Nd+++) is\u00a0used as a \u2018dopant\u2019, or purposely added impurity in either a glass or YAG crystal and the 1.06 \u03bcm\u00a0output wavelength is dictated by the neodymium ion. The lasing material or the host is in the form of\u00a0a cylinder of about 150 mm long and 9 mm in diameter.\r\n\r\n\r\nGas Lasers: \u00a0\r\nThe electric discharge style CO2 gas lasers are the most efficient type currently available for high power laser beam material processing. These lasers employ gas mixtures primarily containing nitrogen and helium along with a small percentage of carbon dioxide, and an electric glow discharge is used to pump this laser medium (i.e., to excite the CO2 \u00a0molecule). Gas heating produced in this fashion is controlled by continuously circulating the gas mixture through the optical cavity area and thus CO2 lasers are usually categorized according to the type of gas flow system they employ; slow axial, fast axial or transverse.\r\n\r\nSlow Axial Flow Gas Laser:\u00a0\r\nThey are the simplest of the CO2 gas lasers. Gas flow is in the same direction as the laser resonator\u2019s optical axis and electric excitation field, or gas discharge path.\r\n\r\n\r\nFast Axial Flow (FAF) Gas Laser:\u00a0\r\nThey have similar arrangement of components as that of slow axial flow gas laser, except that in the case of the FAF Laser, a roots blower or turbo pump is used to circulate the laser gas at high speed through the discharge region and corresponding heat exchangers. The FAF lasers with continuous wave (CW) output power levels of between 500 to 6000 watts are available.\r\nTransverse Flow: \u00a0\r\nThese lasers operate by continuously circulating gas across the resonator cavity axis by means of a high speed fan type blower, while maintaining an electric discharge perpendicular to both the gas flow direction and the laser beam\u2019s optical axis. Transverse flow lasers with output power levels between 1 and 25 kW are available.\r\n\r\n\u00a0\r\n\r\nLBW Process Advantages: \u00a0\r\nMajor advantages of Laser Beam Welding include the following: \u00a0\r\n1) Heat input is close to the minimum required to fuse the weld metal, thus heat affected zones are reduced and workpiece distortions are minimized.\r\n2) Time for welding thick sections is reduced and the need for filler wires and elaborate joint preparations is eliminated by employing the single pass laser welding procedures.\r\n3) No electrodes are required; welding is performed with freedom from electrode contamination, indentation or damage from high resistance welding currents.\r\n4) LBM being a non-contact process, distortions are minimized and tool wears are eliminated.\r\n5) Welding in areas that are not easily accessible with other means of welding can be done by\r\nLBM, since the beams can be focused, aligned and directed by optical elements.\r\n6) Laser beam can be focused on a small area, permitting the joining of small, closely spaced components with tiny welds.\r\n7) Wide variety of materials including various combinations can be welded.\r\n8) Thin welds on small diameter wires are less susceptible to burn back than is the case with arc welding.\r\n9) Metals with dissimilar physical properties, such as electric resistance can also be welded.\r\n10) No vacuum or X-Ray shielding is required.\r\n11) Laser welds are not influenced by magnetic fields, as in arc and electron beam welds. They also tend to follow weld joint through to the root of the work-piece, even when the beam and joint are not perfectly aligned.\r\n12) Aspect ratios (i.e., depth-to-width ratios) of the order of 10:1 are attainable in LBM.\r\nLimitations of the LBM Process: \u00a0\r\n1) Joints must be accurately positioned laterally under the beam and at a controlled position with respect to the beam focal point.\r\n2) In case of mechanical clamping of the weld joints, it must be ensured that the final position of the joint is accurately aligned with the beam impingement point.\r\n3) The maximum joint thickness that can be welded by laser beam is somewhat limited. Thus weld penetrations of larger than 19 mms are difficult to weld.\r\n4) High reflectivity and high thermal conductivity of materials like Al and Cu alloys can affect the weldability with lasers.\r\n\r\n\r\n5) An appropriate plasma control device must be employed to ensure the weld reproducibility while performing moderate to high power laser welding.\r\n6) Lasers tend to have fairly low energy conversion efficiency, generally less than 10 percent.","headline":"Laser Beam Welding Process &#8211; Principle, Advantages , Disadvantages","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2017-07-30","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2017\/07\/laserbeamweldingprocessdiagram-300x147.jpg","height":147,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/table-lifting-mechanis/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2017/07/DesignandfabricationofTableliftingmechanismforuprightdrillingmachines-300x188.png')"></div><span class="sr-only">link to Design and fabrication of Table lifting mechanism for upright drilling machines</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/table-lifting-mechanis/">Design and fabrication of Table lifting mechanism for upright drilling machines</a></p></header><div class="excerpt"><p>Design and fabrication of Table lifting mechanism for upright drilling machines  ABSTRACT:
Now a day many industries using drilling machine, they are want to new model drilling machine and more...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/table-lifting-mechanis/" aria-label="View Post: Design and fabrication of Table lifting mechanism for upright drilling machines">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Design and fabrication of Table lifting mechanism for upright drilling machines","url":"\/\/www.gunkrazy.com\/table-lifting-mechanis\/","articleBody":"Design and fabrication of Table lifting mechanism for upright drilling machines\r\n\r\nABSTRACT:\r\nNow a day many industries using drilling machine, they are want to new model drilling machine and more efficiency so, we have to plane this type of drilling machine, let we have an introduced TABLE LIFTING MECHANISM FOR UPRIGHT DRILLING MACHINES, what we have changes in model maximum drilling machine using by on rack pinion mechanism in table height variation but our project model using rack gear, spur gear and worm gear mechanism. Why we have to using this mechanism in heavy drilling machine and lifting easy drive system.\r\nThe worm gear, spur gear and rack gear engaged together in attached drilling bed. Most of all drilling machine using in industries simple rack and pinion setup this type of mechanism going to need height variation time drive to hand lever in rough condition. We have a fabricated this thing model in neglect in existing draw back it is operated easy and more efficiency increased in drilling machine.\r\n\r\nINTRODUCTION:\r\nDrilling machine is one of the most important machine tools in a workshop. It was designed to produce a cylindrical hole of required diameter and depth on metal workpieces. Though holes can be made by different machine tools in a shop, drilling machine is designed specifically to perform the operation of drilling and similar operations. Drilling can be done easily at a low cost in a shorter period of time in a drilling machine.\r\nDrilling can be called as the operation of producing a cylindrical hole of required diameter and depth by removing metal by the rotating edges of a drill. The cutting tool known as drill is fitted into the spindle of the drilling machine. A mark of indentation is made at the required location with a center punch. The rotating drill is pressed at the location and is fed into the work. The hole can be made up to a required depth.\r\nSo this project \u201cDESIGN AND FABRICATION OF TABLE LIFTING MECHANISM FOR UPRIGHT DRILLING MACHINES\u201d is very much useful, if it is provided with good quality. This is used for any drilling operation and heavy drilling operation it will be done.\r\n\r\nWORKING PRINCIPLE:\r\nThis machine using gear mechanism, it is one of the most common mechanism which is easy to drive and more efficiency given but we have to using small changes in mechanism, what it will be changes means worm and worm wheel using, which is operated bed height adjusting time in drive to worm gear it is simply driven on worm wheel it also rotates by on rack gear so, bed is going down and up operation will be done.\r\nWhen you need the height variation in drill bed just did it adjust on bed support frame connection thread core hand lever.\r\nLAYOUT:\r\n\r\n\r\nDesign and fabrication of Table lifting mechanism for upright drilling machines\r\nADVANTAGE:\r\n\u2022 Simply drive system.\r\n\u2022 Simple construction and low cost consumption.\r\n\u2022 It is improved efficiency level in drilling machine.\r\n\u2022 Height variation time it will be reduced.\r\n\u2022 Low manual power using in operated.\r\n\u00a0\r\nAPPLICATION:\r\n\u2022 Small and large scale industrial usage.","headline":"Design and fabrication of Table lifting mechanism for upright drilling machines","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2017-07-30","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2017\/07\/DesignandfabricationofTableliftingmechanismforuprightdrillingmachines-300x188.png","height":188,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/design-of-automotive-differential-wi/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2017/07/DESIGNOFANAUTOMOTIVEDIFFERENTIALWITHREDUCTIONRATIOGREATERTHAN6-228x300.jpg')"></div><span class="sr-only">link to DESIGN OF AN AUTOMOTIVE DIFFERENTIAL WITH REDUCTION RATIO GREATER THAN 6</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/design-of-automotive-differential-wi/">DESIGN OF AN AUTOMOTIVE DIFFERENTIAL WITH REDUCTION RATIO GREATER THAN 6</a></p></header><div class="excerpt"><p>DESIGN OF AN AUTOMOTIVE DIFFERENTIAL WITH REDUCTION RATIO GREATER THAN 6 
Abstract
 Commonly found automobile differentials have a reduction ratio of 6 at max. This is because designing an...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/design-of-automotive-differential-wi/" aria-label="View Post: DESIGN OF AN AUTOMOTIVE DIFFERENTIAL WITH REDUCTION RATIO GREATER THAN 6">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"DESIGN OF AN AUTOMOTIVE DIFFERENTIAL WITH REDUCTION RATIO GREATER THAN 6","url":"\/\/www.gunkrazy.com\/design-of-automotive-differential-wi\/","articleBody":"DESIGN OF AN AUTOMOTIVE DIFFERENTIAL WITH REDUCTION RATIO GREATER THAN 6\u00a0\r\nAbstract\r\n\u00a0Commonly found automobile differentials have a reduction ratio of 6 at max. This is because designing an automotive differential with a reduction ratio greater than 6 may lead to a bulky design which isn\u2019t feasible to position with the limited space available. Furthermore, increasing the size of the differential may lead to excessive undesired weight. Most on-road vehicles have differentials with reductions of 3 or 4. Commercially speaking, finding a differential with a reduction greater than 6 is close to impossible. Most manufacturers would introduce an additional single speed gearbox however this would over complicate the design and increase servicing costs. The aim of this paper is to design a differential with a reduction ratio greater than 6. The paper includes all the calculations as well as a strength based analysis performed on Altair-Hypermesh, to prove the success of the design.\r\n\r\n\u00a0\r\nDESIGN OF AN AUTOMOTIVE DIFFERENTIAL WITH REDUCTION RATIO GREATER THAN 6\r\nINTRODUCTION\u00a0\r\nWe shall now design a differential using a worm gear reduction around the miter gear set. This is inspired from the \u201cNapier Worm Gear Drive\u201d invented by the British \u201cNapier and Sons\u201d before the First World War. The company was later consumed by \u201cEnglish Electric\u201d however their concept of a worm drive seems very promising.\r\n\r\nInput Parameters\u00a0\r\nInput power: \u00a0 5.8913 kW\r\nInput Speed: \u00a0 4100 rpm\r\nInput Torque: \u00a0 13.7231 Nm\r\nReduction Ratio Reqd.: \u00a0 7:1\r\n\r\nDesign Objective\u00a0\r\nTo design a differential offering a reduction ratio of 7 (7:1). It reduces output speed 7 times and multiplies output torque 7 times.\r\n\r\nMaterial Selection\u00a0\r\nAlloy Steel - 15Ni4Cr1\r\nSut = 1500 N\/mm2 BHN = 650\r\nThis selection is based on the design of worm gears as well. The aim is to use as few different materials so as to be able to make maximum use of recyclable metal scrap. The worm is case hardened alloy steel (15Ni4Cr1) and worm wheel (which should be always be made of a more ductile material than worm) is made of Phosphor Bronze.\r\n\r\n\r\n\r\nAdvantages\u00a0\r\n\u2022 Compact.\r\n\u2022 Light weight.\r\n\u2022 Reduction ratio of even 20:1 is possible by this method.\r\n\u2022 Worm shaft is placed higher in this arrangement near the underbelly of the chassis \u00a0thus less prone to damage.\r\n\u2022 Entire structure is centralized in terms of mass &amp; since C.G. is in the center the positioning is easier.\r\n\u2022 The entire differential offers rotational flexibility about the drive axle axis thus the worm shaft can be tilted at any angle without any trouble or complications. This will not affect the design calculations nor increase design complexity.\r\n\r\n\r\n\r\nDisadvantages\u00a0\r\n\u2022 Limited efficiency at best up to 95%.\r\n\u2022 Due to poorer efficiency, temperature rise must be within permissible limits or else seals may get damaged. Also excessive temperature could lead to tooth failure due to seizure.\r\n\u2022 The entire system is made of two metals. The worm wheel normally has to be made of a more conformable metal (such as Phosphor Bronze). This may increase costs.\r\n\u2022 If the gearing size requirement is larger (for increased torque transmitting capacity), height increases.\r\n\r\n\r\nDownload Report:\r\nDESIGN OF AN AUTOMOTIVE DIFFERENTIAL WITH REDUCTION RATIO GREATER THAN 6\u00a0","headline":"DESIGN OF AN AUTOMOTIVE DIFFERENTIAL WITH REDUCTION RATIO GREATER THAN 6","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2017-07-29","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2017\/07\/DESIGNOFANAUTOMOTIVEDIFFERENTIALWITHREDUCTIONRATIOGREATERTHAN6-228x300.jpg","height":300,"width":228},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <nav class="pagination-wrapper" aria-label="article pagination"> <a class="prev page-numbers" href="?page_num=229">&laquo; PREV</a> <a class="page-numbers" href="?page_num=1"><span class="screen-reader-text">Page </span>1</a> <span class="page-numbers dots">&hellip;</span> <a class="page-numbers" href="?page_num=228"><span class="screen-reader-text">Page </span>228</a> <a class="page-numbers" href="?page_num=229"><span class="screen-reader-text">Page </span>229</a> <span aria-current="page" class="page-numbers current"><span class="screen-reader-text">Page </span>230</span> <a class="page-numbers" href="?page_num=231"><span class="screen-reader-text">Page </span>231</a> <a class="page-numbers" href="?page_num=232"><span class="screen-reader-text">Page </span>232</a> <span class="page-numbers dots">&hellip;</span> <a class="page-numbers" href="?page_num=338"><span class="screen-reader-text">Page </span>338</a> <a class="next page-numbers" href="?page_num=231">NEXT &raquo;</a></nav></section></main><aside id="secondary" class="widget-area"><div class="about-wrapper"><h2 class="widget-title" style="background: #d693c6; color: #ff392e">About Us</h2><div class="about-image" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2020/03/Sachin-Thorat-300x300-min.png')"></div><p class="about-copy">LearnMech.Com is a Mechanical Project-oriented platform run by Sachin Thorat who is a B-Tech Graduate in Mechanical Engineering. 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