Pneumatic Hole Punching Machine

 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.