Drilling Machine: Definition, Parts, Working, Mechanism, Operations, Types, Specifications

Introduction:-

Drilling is basically a single purpose machine tool as its main purpose is to make holes in the workpiece by using of a rotating tool called drill bit or the twist drill.
The material is removed from the workpiece by the shearing and extrusion process.



Parts of Drilling Machine:-

•Bed
•Steeped pulley
•Pillar
•Spindle
•Swivel table
•Chuck
•Motor
•Drill bit
•Hand wheel

Types of Drilling Machine:-

•Portable drilling
•Sensitive drilling
•Upright or column drilling
•Radical drilling
•Gang drilling
•Multi spindle drilling
•Vertical Turret type drilling
•Automatic drilling
•Deep hole drilling
•Turret hole drilling

Specifications of Drilling Machine:-

•Portable drilling machine is specified by the maximum diameter of the drill which can be held.

•Sensitive and the upright drilling machine are specified by the diameter of the largest workpiece that can be held.

•The radical drill machine is specified by the length of the arm and Column diameter.

•Multiple spindle drill machine is specified by the drilling area,the size and the number of the holes the machine can drill.

Cutting speed   =.      π×diameter of the drill                                       in mm×rpm/1000

Machine time   =       L/N×f

L=length of depth of hole in mm
N=rpm of drill
f=feed per revolution


Operation of Drilling Machine:-

•Drilling
•Boring
•Reaming
•Counter boring
•Counter sinking
•Tapping
•Spot facing
•Treapanning
•Honing

Application of Drilling Machine:-

•Manufacturing factory
•Carpentry work
•Construction sites,glass work
•Screwing and fastening
•Reaming, boring,counter boring, tapping.

Advantage of Drilling Machine:-

•High speed
•High flexibility
•High output
•Low maintenance
•Low cost
•Easy to operate


Disadvantage of Drilling Machine:-

•Limited size workpiece
•Oversized hole
•Bearing of drill
•Rough hole
•Chipped cutting lips

Comments

Post a Comment

Popular posts from this blog

Shaper Machine: Definition, Parts, Working, Mechanism, Operations, Types, Specifications

Image
Introduction:- it is a reciprocating type of Machine basically used for producing the horizontal, vertical,flat surface.The shaper holds the single point cutting tool in ram and workpiece is fixed in the table, during the return stock of metal cutting. parts of shper Machine:- •Base  •Column •Table •Cross rail •Ram •Clapper Box •Elevating screw Types of shaper machine:- •Standard shaper •Vertical shpaer •Horizontal shaper •Geared shaper •Universal shaper •Crank shaper •Draw cut shaper •Hydrolic shaper •Counter shaper  Operation of shpaer machine:- •Vertical cutting operation •Horizontal cutting operation •Inclined cutting operation •Angular cutting operation •Irregular cutting operation Application of shaper machine:- •Internal spllines •Gear teeth •Keyway in pully •Contour of concave or convex  Advantage of shaper machine:- •Tool cost is low. •Workpiece hold easily. •Produces falt and angular surface. •Setup of shaper is very easy and tool •change...
Read more

Electric discharge Machine: Introduction,working principle,parts,types of EDM,components,application,advantage,disadvantage,EDM

Image
Introduction:- Electric discharge Machine is the process of metal removal from the work surface due to an erosion of metal caused by electric Spark discharge between the two electrode tool and the work piece. Electrical Discharge Machining is also called or known as Spark machining, spark eroding, burning, die sinking, wire burning or wire erosion. This spark near to 8000 to 12000º C. Parts of Electrical Discharge Machine :- • DC Power supply   •Voltmeter •Ammeter •Tool •Die-electric fluid •Pump •Filter •Servo- controlled feed •Fixture •Table Working of Electrical Discharge Machine :- It consists of an electric power supply, the dielectric medium, the tool, workpiece, and servo control. The workpiece is connected to the positive terminal and the tool is connected to a negative terminal of the DC power supply. An air gap of 0.005 to 0.05 mm is maintained between the tool and the work. The die electric fluid which is non-conductor of electricity is...
Read more

Abrasive Jet Machine: Introduction, Working principle, working process,parts, Application, Advantage, disadvantage, diagram with suitable name

Image
Introduction:-   It is the process of impinging the high speed stream of abrasive particles by high pressure gas or air on the work surface through a nozzle and metal removal occurrs due to erosion caused by high speed abrasive particles.       In this Machining,the abrasive particle size is 10-40 micros.      Jet velocity will be 150 to 300 m|sec. And it is used to superalloys. Parts of Abrasive Jet Machine:- 1.  Gas supply 2. Filter 3. Pressure gauge 4. Regulator 5. Mixing chamber 6 . Nozzle Working Principle of Abrasive Jet Machine:- The figure shown is the above Abrasive jet Machining. It consists of a mixing chamber, gas filter, pressure gauge, regulator, and the nozzle. The filtered gas at a pressure of 2 to 8 kgf/cm2 is supplied to the mixing chamber containing the abrasive powder and vibrating at 50 Hz, where it mixes with abrasive particles and then enters into the connecting hose. The abrasive and gas mixture c...
Read more