This document presents a project on a bender and grinder machine. It discusses the components, working, advantages and applications of roller benders, pipe benders and belt grinders. Roller benders use three rollers and hydraulic pressure to plastically deform metal bars into circular shapes. Pipe benders use a U-groove pulley and handle to bend pipes. Belt grinders use an abrasive belt and motor to remove material. The bender and grinder machine can bend pipes and metal bars for uses in construction, manufacturing and other industries.

1. PROJECT PRESENTATION
BENDER AND GRINDER
SUBMITTED BY PROJECT GUIDE
PARVINDER SINGH ER. AJAY KUMAR
HARSHIT CHANDEL
PANKAJ SINGH
RAM BAHADUR
RISHABH SHARMA
RISHI KANT THAKUR
PROJECT COORDINATOR
DR. RITESH KONDAL

2. CONTENTS
INTRODUCTION
PRINCIPLE OF BENDER AND GRINDER
OBJECTIVE OF BENDER AND GRINDER
COMPONENTS
WORKING
OPERATIONS
ADVANTAGES
LIMITATIONS
APPLICATIONS

3. INTRODUCTION
Bending is a process to convert the
straight bars into the arc or circular shapes.
It is a very important process in the various
industries like manufacturing, automobile
etc.
Bending is a process by which metal is
deformed by plastically deforming the
material and changing its shape.
Bending usually refers to deformation about
one axis.
Bending is flexible process by which many
different shape can be produced

4. ROLLER BENDER
 Roller bender is a mechanical
device which is used to bend
various type of straight metallic
bars into arc or circular shape.
 The metallic bars which are bend in
this bender can be of any cross
section like circular square
rectangular etc.
 Roller bender is typically a bending
machine which is used for circular
bending.

5. BELT GRINDER
• Belt grinder is used for material
removal by using abrasive
material.

6. PIPE BENDER
• Pipe bender is used to bend the
hollow pipe in u-shape and at
any angle using pulley and
handle .

7. PRINCIPLE OF ROLLER BENDER
Roller bender works on principle that roller freely rotate about three parallel axis,
which are arranged with horizontal spacing.
The two outer rollers , usually immobile , cradle the bottom of material while the
inner roller whose position is adjustable, pressures on top side of the material.
The plastic deformation of bar is retained through out the process.

8. OBJECTIVES OF
ROLLER BENDER
 It is used to convert straight metallic
bar into circular shape.
 Most important aspects is that we
can bend bars into different
diameters.
 It is cost effective due to simple
design.
 Bending of various cross section
can be done

9. COMPONENTS OF ROLLER BENDER
Hydraulic jack
Frames
Bearing
Return spring
Rollers
Hand wheel

10. COMPONENTS OF PIPE BENDER
U–Groove Pulley
Handle
Base Frame

11. COMPONENTS OF GRINDER
Motor
Abrasive belt
Pulley

12. HYDRAULIC JACK
A hydraulic jack is a
device that is used to lift
heavy loads by applying a
force via a hydraulic cylinder.
Hydraulic jacks lift loads
using the force created by the
pressure in the cylinder
chamber.

13. FRAME
A structure is called a frame if at
least one of its individual members
is a multi force member. A multi
force member is defined as one
with three or more forces acting on
it, or one with two or more forces
and one or more couples acting on
it. Frames are structures which are
designed to support applied loads
and are usually fixed in position.

14. PEDESTAL BEARING
A pedestal bearing is a pedestal used to
provide support for a rotating shaft with the
help of compatible bearings & various
accessories. Housing material for a pillow
block is typically made of cast iron or cast
steel.
A pillow block refers to any mounted bearing
wherein the mounted shaft is in a parallel
plane to the mounting surface, and
perpendicular to the center line of the
mounting holes, as contrasted with various
types of flange blocks or flange units.
A pillow block may contain a bearing with
one of several types of rolling elements,
including ball, cylindrical roller, spherical
roller

15. ROLLER
In this project the roller is used to bend a pipe in angular shape.
There are 3 rollers which are used to bend a pipe in curvature shape. Roller is a
cylinder that rotates about a central axis and is used in various machines and devices to
move, flatten or spread something. A roller always consist a bearing.
Out 3 of the only one is diving roller and other two are driven rollers.
Radius of curvature depends on distance between the rollers.

16. HAND WHEEL
It is nothing but a rotary wheel of round pipe
to give rolling action to rollers manually.
 When we rotate the wheel, a torque is
applied on it to pass the sheet and pipes under
it. This hand wheel is attached with one the 3
rollers and used to rotate roller manually.
It is larger in size in order to reduce the
efforts to rotate it.

17. DESIGN OF ROLLER BENDER IN SOLID WORKS

20. WORKING
• After the bar is initially inserted into the jig, the middle roller is manually lowered
and forced against the bar with hydraulic jack. This causes the bar to undergo both
plastic and elastic deformation. The portion of the bar between the roller while
take on shape of a cubic polynomial, which approximates a circular arc. The
rollers are then rotated moving the bar along with them.
• For each new position, the portion of the bar between the rollers take on the shape
of a cubic modified by the end conditions imposed by the adjacent sections of the
bar. When either end of the bar is reached, the force applied to the center roller is
incrementally increased, the roller rotation is reversed and as the rolling process
proceeds, the bar shape become a better approximation to a circular arc, gradually,
for the number of the passes required to bring the arc of the bar to the desired
radius.

21. ADVANTAGES
• Low cost operation and maintenance.
• Extremely high output forces and force multiplication by
means of the "hydraulic lever".
• Hydraulic systems are self-lubricating and power saving.
• It can only bend-Up to 10 mm thick.
• Great efficiency and economy due to low friction losses and
high system reliability.

22. LIMITATIONS
• It can only bend pipes of limited thickness.
• Heavy work is not possible.
• Because of manually operated machine, process is not fast or
continuous.

23. APPLICATION
• Building construction.
• Chemical Plant and Petro-chemical Plants etc.
• Material handling equipment.
• Cycle, bikes frames etc.
• Réfrigération pipes and Boiler tubes etc.

24. CONCLUSION
Such type of bending machine more important for small scale work as well
as industrial work in less cost and more precision and accuracy of different
type of pipe bending. The machine capacity can be increased according to the
need. Manual bending tends to minimize wrinkles and can reduce springbuck.
By its design the defects can be easily overcome. Simpler design not only
reduces the defects but also contributes to fluid pressure test during bending.
It should be noted the tendency to wrinkle and the cross section of tube
deformation are reduced. Thus, this approach can be used for bending a thin
walled tube over a small radius of the die, which can be achieved with a
conventional method of bending the tube. In this paper, the problem of
bending and axial stretching the internal pressure is investigated using the
machine coordinate system (CMM) measurement. The objective of the study
is to develop a tool that accurately predicts the change of the wall thickness
and the cross-section of the tube distortion under different loading conditions.

25. THANK YOU