EnggProjectsIdeas

Pneumatic Hole Punching Machine

2013-03-12T08:19:00.001-07:00

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

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.

Pneumatic Vice

2013-03-08T03:13:00.000-08:00

Pneumatic Vice

An engineer's vise, also known as a metalworking bench vise or fitter's vise, is used in metalworking applications. The jaws are made of soft or hard metal. The vise is bolted onto the top surface of the bench with the face of the fixed jaws just forward of the front edge of the bench. The bench height should be such that the top of the vise jaws is at or just below the elbow height of the user when standing upright. The vise may include other features such as a small anvil on the back of its body.

The nut in which the screw turns may be split so that, by means of a lever, it can be removed from the screw and the screw and moveable jaw quickly slid into a suitable position at which point the nut is again closed onto the screw. The disadvantage to this system is lower precision, as compared to a solid screw system. Vise screws are usually either of an Acme thread form or a buttress thread. Those with a quick-release nut use a buttress thread. Some vises have a hydraulic or pneumatic screw, making setup not only faster, but more accurate as human error is reduced.^[^{citation needed}^]

For large parts, an array of regular machine vises may be set up to hold a part that is too long for one vise to hold. The vises' fixed jaws are aligned by means of a dial indicator so that there is a common reference plane.

For multiple parts, several options exist, and all machine vise manufacturers have lines of vises available for high production work:

· The first step is a two clamp vise, where the fixed jaw is in the center of the vise and movable jaws ride on the same screw to the outside.

· The next step up is the modular vise. Modular vises can be arranged and bolted together in a grid, with no space between them. This allows the greatest density of vises on a given work surface. This style vise also comes in a two clamp variety.

· Tower vises are vertical vises used in horizontal machining centers. They have one vise per side, and come in single or dual clamping station varieties. A dual clamping tower vise, for example, will hold eight relatively large parts without the need for a tool change.

· Tombstone fixtures follow the same theory as a tower vise. Tombstones allow four surfaces of vises to be worked on one rotary table pallet. A tombstone is a large, accurate, hardened block of metal that is bolted to the CNC pallet. The surface of the tombstone has holes to accommodate modular vises across all four faces on a pallet that can rotate to expose those faces to the machine spindle.

· New work holding fixtures are becoming available for five-axis machining centers. These specialty vises allow the machine to work on surfaces that would normally be obscured when mounted in a traditional or tombstone vise setup

Mech Engineering Projects Ideas

2012-04-02T03:57:00.000-07:00

EnggProjectsIdeas

Pneumatic Hole Punching Machine

Pneumatic Vice

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