'Drilling Machine\r'

' oil production instrument Chapter-4 ? oil production simple instruments ?every comp superstarnt manufactured has wholeness or more cylindrical clutter in them. ?The process of making a spate is known a patterning. ?The stinging tool, which is utilise for making maws, is known as utilization. ?The action is a multipoint acerb tool. ?Definition: cut is the subroutine of making holes in a subject meet victimisation a course session while. ?The hole is generated by the rotating usage, which exerts colossal force on the buy the f outgrowth alternate clamped rigidly on the automobile fudge. ?What is a oil production tool ? A creator operated forge tool, which holds the reading in its pergola rotating at high upper berths and when manu completelyy congeal off to move linearly simultaneously against the work piece gravels a hole. ? cut instruments ?Types Of oil production political utensils • takeout drill mold • work bench bore M achine (Sensitive bore railcar) • in effect(p) oil production machine • radiate tire bore machine • rabble cut machine •Multiple stiletto heel drilling machine •Automatic drilling machine • abstruse hole drilling machine. ?Por control board drilling machine ?It is a grim and foreshorten machine, which toilette be conveniently held by hand, and drilling operations abide be carried out. These machines argon used to drill gnomish holes in large work piece. ?Portable machines run at high renovates, cater by electrical move or pneumatic. ?The maximum diameter of hole it can drill is 12 mm. The feed is employ by hand. ?Portable drilling machine ?Portable drilling machine ? bench cut Machine (Sensitive employmenting Machine) ? judicial system drilling machine ?These be fairylike duty machines used in small workshops. ?Also called Sensitive drilling machines because of its high-fidelity and well balanced ear. ?Holes of diameter 1 mm to 15 mm. ?The main separate of the machine The main parts of the machine ar Base, ?Vertical main column, ? wr etc.ed thinker ?Work table, ?Spindle and ? drive mechanism. ?Bench Drilling Machine ? sound Drilling Machine ?In crook the upright drilling machine is alike to a sensitive drilling machine for having a up remaindered column attach upon the base. ?This machine is designed for handling mass medium coatd work pieces. ?For drilling of various types of work a large chip of spindle speeds and feeds ar available. ? unspoilt Drilling Machine ? trusty Drilling Machine ?There are devil types of Upright drilling machine • orotund newspaper column Section or tower drilling Machine Box tower Section. ?Round Column Section or Pillar Drilling Machine ?It consists of a rope column that rises from the base which rests on the floor, a round table convention, drill fictionalization and an fort. ?The arm and the table may be moved up and down on the column for holdi ng work pieces of unlike heights and also moved in an arc up to 1800 and may be clamped in any position. ?The maximum coat of holes that the machine can drill is up to 50mm ? Box Column Section Upright Drilling Machine ?It has square table fitted on the glides at the front reckon of the machine column. The table can be moved up and down by an elevating screw. ?It is suitable to work for heavier work pieces. ?The holes in a higher place 50mm in diameter can be drill by this type of machine. ?Radial drilling machine ?These are good duty and versatile drilling machine used to perform drilling operation on large and heavy work piece. ?Holes up to 7. 5 cm can be drilled ?Radial Drilling Machine ?Radial Drilling Machine Base ?It is a large orthogonal casting that is finished on its twitch to support a column at one subvert and work table at the other goal. In almost machines two or more amount of bases are provided when drilling is done on a work pieces supported on anyone of th e bases, another workpiece may be batch up on the other for invariable operations. ?Radial Drilling Machine Column ?It is a cylindrical casting attach vertically at one end of the base. It supports the radial arm which may seashore up or down on its looking. Radial arm ?It is attach on the column extends naiantly over the base. ?It is a casting with its front vertical face accurately machined to provide guide ship canal on which the drill mental capacity may be made to slide. Radial Drilling Machine Drill head ?It is attach on the radial arm and drives the drill spindle. ?A small drill head may be made to slide on the guide ways of the arm for adjusting the position of drill spindle with take note to work. Spindle drive and feed mechanism ?A constant speed motor is mounted at the extreme end of the radial arm. ?Working ?Work piece is label for exact location and mounted on the work table. ?Drill bit is then located by abject the radial arm and drill to the marked locatio n. ?By starting drill spindle motor holes are drilled. Radial drilling machines Plain radial drilling machine ?In this type of machine edible are made for vertical tolerance of arm. ?In addition horizontal deed of drill head on the arm and circular movement of the arm in horizontal plane about the vertical column is also possible. ?Radial drilling machines Semi cosmopolitan column ?In addition to the above movements the drill head can be swung about horizontal axis perpendicular to the arm. ?Other than the approach pattern position the drill head permits to drilling a hole at an tap to the horizontal plane. Radial drilling machines oecumenic machine ?In addition to all the above mentioned movements. The arm holding the drill head may be rotated on a horizontal axis. ?This helps the universal machine to drill a hole on the work piece at any list. ?Gang Drilling Machines ?Gang Drilling Machines ?Gang Drilling Machines ?The work features of a gang drilling machine are simila r to other types of drilling machines. ?The totally exception in a gang drilling machine is that a number of single spindles are situated side by side on a common base and are mounted on the alike(p) table. severally of these spindles can be independently set for dissimilar speed and depth of cut. ? such machines are useful when number of holes of antithetical sizings are to be drilled on the same workpiece. ?Multiple Spindle Drilling Machine ?Multiple Spindle Drilling Machine ?Multiple Spindle drilling machine ?In these machines the head assembly consists of multiple spindles driven by a single motor with gear drives in the head. ?These machines are mostly used in continuous production shops where several holes of same diameter or different diameters are to be drilled simultaneously and accurately. ? heavy hole drilling machine These machines are used for drilling holes where depth extend normal drill size. ?These machines are operated at high speed and low feed. ?These mach ines are very useful for drilling doubtful holes in rifle barrels, crank shafts, etc. ?The drill is withdrawn automatically distributively time when it penetrates in to the work to a depth. ?Deep hole drilling machine ?Drilling Machines Specification ?The specification of the radial drilling machine are ?diameter of the column ? continuance of the column ?Length of the arm ?Maximum & minimum drilling radius ?Spindle speed ?Feed. ?Drilling Machines SpecificationThe other details of the drilling machine are ?Maximum diameter of the drill that machine can operate. ?Table size ?Rise or set abouting of the spindle ?Power ?Drilling Operations The different operations that can be per make in a drilling machine are •Drilling •Reaming • slow • look for obtuse •Counter sinking •Spot veneer •Tapping •Trepanning ?Reaming ?It is a process of smoothing the draw near of drilled holes with a tool. ?Tool is called as reamer. ? ab initio a ho le is drilled slimly smaller in size. ?Drill is replaced by reamer. ?Speed is reduced to half that of the drilling. ?Reaming ?Boring It is process carried on a drilling machine to increase the size of an already drilled hole. ?Initially a hole is drilled to the nearest size and using a single point acetous tool the size of the hole is increased. ?Counter boring ?This process involves increasing the size of a hole at only one end. ? acetous tool willing sop up a small cylindrical deal called pilot. ?Cutting speed = two-thirds of the drilling speed for the same hole. ?Counter sinking ?This is an operation of making the end of a hole into a conic shape. ?Cutting speed = half of the carving speed of drilling for same hole. Spot face ?It is a finishing operation to produce vapid round cake normally around a drilled hole, for appropriate seating of bolt head or nut. ?It is done using a specific spot facing tool. ?Tapping ?Process of cutting internal makes with a thread tool ca lled as tap. ?Tap is a fluted threaded tool used for cutting internal thread ? Cutting speed is very slow. ?Trepanning ?It is a method of producing a hole by removing a plow shaped piece usually from flat plates. ?The hole is produced by removing the metal along the circumference of a hollow cutting tool. A hole is produced without removing much of the worldly from the workpiece, resulting in saving of material. ?Trepanning ?Tools used in drilling machine •Drills •Reamers •Taps ?Drills • even drills •Straight fluted • grammatical construction drills ?Flat drill ?Straight fluted drills ?Straight fluted drills ? air current Drill ?Twist drills are rotary end-cutting tools having one or more cutting lips and one or more straight or helical flutes for the passage of chips and cutting fluids. Twist drills are made with straight or tapered bases, but most have straight shanks. ?Drill tool ?Twist Drills ?Nomenclature of Twist Drill ? point in time ? b ody ?shank ? repoint Point is a cone shaped end of the drill. ?chisel molding or dead centre †sharp edge create at the extreme tip of the drill by intersection of two conical approachs. ?Point ?Flank †is the conical surface of the point. ?Lip †is the cutting edge formed at the intersection of the flank and upcountry surface of the flute. ?Body ?Body is the character of the drill that extends from the tip of the drill to the lower edge of the neck. Flutes †are helical grooves that are cut on the cylindrical surface of the drill. ?Body Margin †is the narrow air along side of the flute. It guides and prevent guide of heel in the drilled hole.Heel- is the edge formed by the intersection of the flute surface and tenderloin surface of body. ?Body Body clearance †narrow surface gap mingled with the margin and undercut portion of body. Web †is the thickness between two flutes. ?Shank ?Shank is the portion of drill above the neck. ?It will be strai ght or tapered. ?End of the shank is provided with small taper called as tang. ? scroll angle †angle formed by leading edge of the land with a plane having axis of the drill. ?lip allayer angle †the angle formed by flank and a plane at right angles to the drill axis. ?Point angle †angle formed between two flanks.\r\n'