INDRODUCTION
Pneumatic hole punching helps to make the hole in sheet metal by using Compressed Air. Pneumatic
actuators controlled energy to
the punch , so the Operator needs to provide only modest effort regardless of
conditions. Pneumatic Punching machine helps to make hole in Various size by
changing tool. As well, pneumatic Punch provides some feedback of forces acting
on the Sheet and Hole can Made in Sheet metal.
Pneumatic
Hole punching machine is reduce Effort To Operator. Operator Need Very Less
amount of effort.
Pneumatic
hole punching machine operated by compressed Air. Pneumatic clamp have
pneumatic Cylinder, 5/2 Flow control Hand Lever valve
Design
Construction
Depending on the job specification, there are
multiple forms of body constructions available :
- Tie rod cylinders: The most common cylinder constructions that can be used in many types of loads. Has been proven to be the safest form.
- Flanged-type cylinders: Fixed flanges are added to the ends of cylinder, however, this form of construction is more common in hydraulic cylinder construction.
- One-piece welded cylinders: Ends are welded or crimped to the tube, this form is inexpensive but makes the cylinder non-serviceable.
- Threaded end cylinders: Ends are screwed onto the tube body. The reduction of material can weaken the tube and may introduce thread concentricity problems to the system
4. Tool:
Punch tooling (punch and die) is
often made of hardened steel or tungsten
carbide. A die is located on the opposite side of the workpiece and
supports the material around the perimeter of the hole and helps to localize
the shearing forces for a cleaner edge. There is a small amount of clearance
between the punch and the die to prevent the punch from sticking in the die and
so less force is needed to make the hole. The amount of clearance needed
depends on the thickness, with thicker materials requiring more clearance, but
the clearance is always less than the thickness of the workpiece. The clearance
is also dependent on the hardness of the workpiece. The punch press forces the
punch through a workpiece, producing a hole that has a diameter equivalent to
the punch, or slightly smaller after the punch is removed. All ductile
materials stretch to some extent during punching which often causes the punch
to stick in the workpiece. In this case, the punch must be physically pulled
back out of the hole while the work is supported from the punch side, and this
process is known as stripping. The hole walls will show burnished area,
rollover, and die break and must often be further processed. The slug from the
hole falls through the die into some sort of container to either dispose of the
slug or recycle it.
PRINCIPLE
OF PROJECT
Punching
is a metal forming
process that uses a punch press to force a tool, called a punch, through the workpiece to create
a hole via shearing. The punch often passes through the
work into a die. A scrap slug from the hole is deposited
into the die in the process. Depending on the material being punched this slug
may be recycled and reused or discarded. Punching is often the cheapest method
for creating holes in sheet metal in medium to high production volumes. When a
specially shaped punch is used to create multiple usable parts from a sheet of
material the process is known as blanking. In forging applications the work is
often punched while hot, and this is called hot punching
Punch tooling (punch
and die) is often made of hardened steel or tungsten
carbide. A die is located on the opposite side of the workpiece and
supports the material around the perimeter of the hole and helps to localize
the shearing forces for a cleaner edge. There is a small amount of clearance
between the punch and the die to prevent the punch from sticking in the die and
so less force is needed to make the hole. The amount of clearance needed
depends on the thickness, with thicker materials requiring more clearance, but
the clearance is always less than the thickness of the workpiece. The clearance
is also dependent on the hardness of the workpiece. The punch press forces the
punch through a workpiece, producing a hole that has a diameter equivalent to
the punch, or slightly smaller after the punch is removed. All ductile
materials stretch to some extent during punching which often causes the punch
to stick in the workpiece. In this case, the punch must be physically pulled
back out of the hole while the work is supported from the punch side, and this
process is known as stripping. The hole walls will show burnished area,
rollover, and die break and must often be further processed. The slug from the
hole falls through the die into some sort of container to either dispose of the
slug or recycle it
This Pneumatic hole Punching machine
Have Pneumatic cylinder, 5/2 solenoid valve, Tool Arrangements , bolts Nut
Supporting pillar.
When The air from compressor,
it will be taking a decision to move the tool down. Also it will up and down
movement when the obstacle crossing time that will also press sheet with the
help of pneumatic cylinder, and it will be given to the solenoid valve and then it will move up or
down depends upon the air speed. The tool movement and Up, down can be done with the
help of pneumatic cylinder.
This
machine are mostly used in Industrial
use to Mass Production It can punch hole rapidly and Multi size Jobs.
It
Have 10 bar maximum Pressure capacity . It can clamp 1 mm to 2mm thickness work
pieces.
It cost also less, high efficiency, work loading
time is less.