This presentation discusses different types of sawing machines used for cutting metal. It covers reciprocating saws, band saws, and circular saws. Reciprocating saws, also called power hacksaws, use a blade that moves back and forth through the workpiece. Band saws have an endless blade running over two wheels that can cut in any direction. Circular saws cut using a revolving disc blade and come in varieties like cold saws, friction discs, and abrasive discs. The presentation provides details on the components, operation, and applications of these common metal sawing machine types.

1. PRESENTATION
ON
TYPES OF SAWING MACHINES
GUIDED BY:- Prof. CHANDRAKANT BHATIA
MANUFACTURING PROCESS 1
SUBMITTED BY:
HIMANSHI GUPTA(140120119057) / ME / A1
PRACHI SHARMA(140120119216) / ME / A1
VIDISHA VYAS(140120119253) / ME / A1
(2131903)
GA N D H IN A GA R IN STITU TE OF
TEC H N OLOGY

2. 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 cutting
2. Low wastage of material
3. Good quality of dimensional accuracy
4. Low power consumption

4. 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

5. SAW
• Saws are characterized by
1. Material
2. Tooth form
3. Teeth set
4. Tooth spacing
5. 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

6. TYPES OF SAWING MACHINES
In general the sawing machines are classified as :
(a) Reciprocating saw (Power Hacksaw)
1. Horizontal sawing machine
2. Vertical sawing machine
(b) Band saws
1. Contour band saw
2. Friction blade
(c) Circular saws
1. Cold saw
2. Friction disc
3. Abrasive disc

7. RECIPROCATING SAW
• Known as power hack saws
• Consists of:
1. Saw frame
2. Means for reciprocating the saw and frames
3. Work table and vice
4. Supporting base
5. Source of power

8. • Most of the operations are hydraulically
controlled
• Both square and angular cuts can be made
Operation 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

10. 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

11. 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

13. CIRCULAR SAW
• Cut by means of a revolving disc
• Disc may have large teeth or no teeth
COLD 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

14. 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 surface
ABRASIVE DISCS
• Rubber bonded wheels rotating at high speeds
are used
• Cutting action is fast and accurate
CIRCULAR SAW

16. 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

17. BIBILIOGRAPHY
• WIKIPEDIA
• www.ignou.ac.in
• GOOGLE IMAGES
• WORKSHOP TECHNOLOGY BY HAJRA
CHOUDHARY
• PRODUCTION TECHNOLOGY BY R.K
JAIN