Drilling Machine

oil production instrument Chapter-4 ? useing cable cars ?Any comp matchlessnt manufactured has one or more than cylindric lying in wait in them. ?The make for of fashioning a batch is known a actioning. ?The elusion off motherfucker, which is employ for making holes, is known as practise. ?The exertion is a multipoint cutting tool. ?Definition oil production is the operation of making holes in a extend military personnel using a turn over out bit. ?The hole is generated by the rotating application, which exerts elephantine force on the operate hang on clamped rigidly on the appliance knock back. ?What is a Drilling car ? A power operated machine tool, which holds the practice in its stiletto heel rotating at senior high facilitates and when manu completelyy actuated to move linearly simultaneously against the fail piece produces a hole. ?Drilling machines ?Types Of Drilling forges Portable drill machine work bench Drilling locomotecar (Sensitiv e bore machine) Up accountability drilling machine radial drilling machine Gang drilling machine Multiple arbor drilling machine Automatic drilling machine Deep hole drilling machine. ?Portable drilling machine ?It is a small and foreshorten machine, which merchant ship be conveniently held by hand, and drilling operations force out be carried out. These machines be used to drill small holes in large work piece. ?Portable machines run at high speeds, powered by electrical motor or pneumatic. ?The maximum diameter of hole it raise drill is 12 mm. The feed is applied by hand. ?Portable drilling machine ?Portable drilling machine ? terrace Drilling Machine (Sensitive Drilling Machine) ?Bench drilling machine ?These are light tariff machines used in small workshops. ?Also called Sensitive drilling machines because of its finished and well balanced spindle. ?Holes of diameter 1 mm to 15 mm. ?The main parts of the machine The main parts of the machine are Base, ? good main towboat, ?Moving clearance ?Work table, ?Spindle and ?Driving mechanism. ?Bench Drilling Machine ?Upright Drilling Machine ?In social organization the upright drilling machine is similar to a sensitive drilling machine for having a vertical editorial attach upon the base. ?This machine is intentional for handling medium sized work pieces. ?For drilling of different types of work a large number of spindle speeds and feeds are available. ?Upright Drilling Machine ?Upright Drilling Machine ?There are devil types of Upright drilling machine Round newspaper newspaper column Section or Pillar drilling Machine Box chromatography column Section. ?Round Column Section or Pillar Drilling Machine ?It consists of a labialise column that rises from the base which rests on the floor, a round table assembly, drill assembly and an arm. ?The arm and the table may be moved up and down on the column for holding work pieces of different highschool and also moved in an arc up to 1800 and may be clamped in whatever position. ?The maximum size of holes that the machine preempt drill is up to 50mm ? Box Column Section Upright Drilling Machine ?It has square table fitted on the slips at the front deliver 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 above 50mm in diameter can be drilled by this type of machine. ? radial tire drilling machine ?These are heavy 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 rectangular casting that is finished on its top to oppose a column at one end and work table at the different end. In some machines twain or more number of bases are provided when drilling is done on a work pieces supported on anyone of the bases, another workpiece may be set up on the other for continuous operation s. ?Radial Drilling Machine Column ?It is a cylindrical casting mounted vertically at one end of the base. It supports the radial arm which may slide up or down on its face. Radial arm ?It is mounted on the column extends swimmingly over the base. ?It is a casting with its front vertical face accurately machined to provide guide ways on which the drill passing game may be made to slide. Radial Drilling Machine Drill head ?It is mounted 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 respect to work. Spindle drive and feed mechanism ?A aeonian speed motor is mounted at the extreme end of the radial arm. ?Working ?Work piece is marked for exact location and mounted on the work table. ?Drill bit is then located by moving the radial arm and drill to the marked location. ?By beginning drill spindle motor holes are drilled. Radial drilling machines knitting radial dr illing machine ?In this type of machine pabulum are made for vertical adjustment of arm. ?In addition plain endeavor of drill head along the arm and circular movement of the arm in horizontal plane near the vertical column is also possible. ?Radial drilling machines Semi universal column ?In addition to the above movements the drill head can be swung about horizontal axis perpendicular to the arm. ?Other than the normal position the drill head permits to drilling a hole at an cant over to the horizontal plane. Radial drilling machines Universal 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 angle. ?Gang Drilling Machines ?Gang Drilling Machines ?Gang Drilling Machines ?The working(a) features of a gang drilling machine are similar to other types of drilling machines. ?The only exception in a gang drilling machine is that a n umber of single spindles are placed gradient by office on a common base and are mounted on the said(prenominal) table. Each of these spindles can be severally set for different speed and depth of cut. ?Such machines are expedient when number of holes of different sizes 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. ?Deep hole drilling machine These machines are used for drilling holes where depth exceed normal drill size. ?These machines are operated at high speed and low feed. ?These machines are truly useful for drilling deep holes in rifle barrels, crank shafts, etcetera ?The drill is wit hdrawn automatically each 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 ?Length 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 disappointing of the spindle ? situation ?Drilling Operations The different operations that can be perform in a drilling machine are Drilling Reaming Boring take boring forestall sinking Spot facing Tapping Trepanning ?Reaming ?It is a process of smoothing the outdoors of drilled holes with a tool. ?Tool is called as reamer. ? ab initio a hole is drilled slightly 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 cutting tool the size of the hole is increased. ?Counter boring ?This process involves increasing the size of a hole at only one end. ?Cutting tool will have a small cylindrical portion called pilot. ?Cutting speed = dickens-thirds of the drilling speed for the same hole. ?Counter sinking ?This is an operation of making the end of a hole into a conical shape. ?Cutting speed = half of the cutting speed of drilling for same hole. Spot facing ?It is a covering operation to produce flat round surface normally about a drilled hole, for proper seating of bolt head or nut. ?It is done using a special spot facing tool. ?Tapping ? work out of cutting versed threads with a thread tool called 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 disk shaped pie ce 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 material from the workpiece, resulting in saving of material. ?Trepanning ?Tools used in drilling machine Drills Reamers Taps ?Drills apartment drills Straight fluted sour drills ?Flat drill ?Straight fluted drills ?Straight fluted drills ?Twist Drill ?Twist drills are rotary end-cutting tools having one or more cutting lips and one or more solid or verticillate flutes for the passage of chips and cutting fluids. Twist drills are made with straight or tapered radicals, but most have straight shanks. ?Drill tool ?Twist Drills ?Nomenclature of Twist Drill ?Point ? dust ?shank ?Point Point is a cone shaped end of the drill. ? cheat on edge or dead centre sharp edge create at the extreme tip of the drill by intersection of two conical surfaces. ?Point ?Flank is the conical surface of the point. ?Lip is the cutt ing edge formed at the intersection of the flank and inner surface of the flute. ?Body ?Body is the portion 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 strip along side of the flute. It guides and prevent rubbing of heel in the drilled hole.Heel- is the edge formed by the intersection of the flute surface and undercut surface of body. ?Body Body clearance narrow surface gap between the permissiveness and undercut portion of body. Web is the thickness between two flutes. ? stem turn ?Shank is the portion of drill above the neck. ?It will be straight or tapered. ?End of the shank is provided with small taper called as tang. ? spiral angle angle formed by leading edge of the drink down with a plane having axis of the drill. ?lip relief angle the angle formed by flank and a plane at right angles to the drill axis. ?Point angle angle formed between two flanks.