PRESENTATIONON

TYPES OF SAWING MACHINES

GUIDED BY:- Prof. CHANDRAKANT BHATIAMANUFACTURING PROCESS 1

SUBMITTED BY:HIMANSHI GUPTA(140120119057) / ME / A1PRACHI SHARMA(140120119216) / ME / A1VIDISHA VYAS(140120119253) / ME / A1

(2131903)

GANDHINAGAR INSTITUTE OF TECHNOLOGY

METAL SAWING• Materials like wood and metals are often cut using

sawing machines.• Metal sawing is like any other metal processing method

and it is governed by similar cutting requirements. • Advantages of sawing machine:1. Speed of cutting2. Low wastage of material3. Good quality of dimensional accuracy4. Low power consumption

SAW• Multipoint cutting tool• Large number of teeth move through the work

piece• Each successive tooth deepens the cut made by

its predecessor tooth• Feed is given either to the saw or the work piece• Straight or curved profile may be cut by

controlling the direction of feed motion

SAW• Saws are characterized by1. Material2. Tooth form3. Teeth set4. Tooth spacing5. Size• Good quality metal cutting saws are made of high carbon

or high speed steel• Hack saw (power saw) and band saws are generally made

solid

TYPES OF SAWING MACHINES

In general the sawing machines are classified as :(a) Reciprocating saw (Power Hacksaw)1. Horizontal sawing machine2. Vertical sawing machine(b) Band saws3. Contour band saw4. Friction blade(c) Circular saws5. Cold saw6. Friction disc7. Abrasive disc

RECIPROCATING SAW

• Known as power hack saws• Consists of:1. Saw frame2. Means for reciprocating the saw and frames3. Work table and vice4. Supporting base5. Source of power

• Most of the operations are hydraulically controlled

• Both square and angular cuts can be madeOperation of reciprocating saw• Machine drives a blade back and forth through

a work piece, pressing down on the cutting stroke and releasing the pressure on the return

RECIPROCATING SAW

BAND SAWS

• Band saw consist of endless saw blade sued to a greater extent for cut off and straight sawing operations for metals

• A continuous saw blade runs over the rims of two wheels on the machine

BAND SAWS

CONTOUR BANDSAW• Work may be fed in any direction on the table• Direction of feed is readily controlled and

changed while cutting is in process FRICTION BANDSAW• The dull blade produces great friction and the

kerfs of the teeth removes small, softened particles of the work

CIRCULAR SAW

• Cut by means of a revolving disc• Disc may have large teeth or no teethCOLD SAW• Has a circular blade with inserted teeth• Large diameter blades• Cuts very rapidly• Runs at relatively slow speed but very powerful• Average thickness of cut is 6mm

FRICTION DISCS• Circular blades having almost no teeth• High speed • Generate heat• Metal is removed by heat of friction• Leaves a heavier burr and less accurate surfaceABRASIVE DISCS• Rubber bonded wheels rotating at high speeds are

used• Cutting action is fast and accurate

CIRCULAR SAW

CONCLUSION

• Metal sawing is one of the inevitable operations of metal shaping

• Metal sawing cuts the metal into two or more pieces as per the requirement with exact dimensional accuracy

• It is categorized into different categories depending upon the profile of saw tooth

BIBILIOGRAPHY

• WIKIPEDIA• www.ignou.ac.in• GOOGLE IMAGES• WORKSHOP TECHNOLOGY BY HAJRA

CHOUDHARY• PRODUCTION TECHNOLOGY BY R.K

JAIN