Use of the punch
Updated: Jul 28
About punch and what it is
Punching is a separating technique, mainly used to process holes into flat materials like paper, plastic film, or sheet metals. Normally, the punching equipment consists of two tool parts – one support for the punches and one for the dies. While the punches enter the dies, the material is being sheared cut.
Punching is often the cheapest method for creating holes in sheet materials 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 Metal Forging applications the work is often punched while hot, and this is called hot punching. Slugging is the operation of punching in which the punch is stopped as soon as the metal fracture is complete and metal is not removed but held in the hole.
Slugging is the operation of punching in which the punch is stopped as soon as the metal fracture is complete and metal is not removed but held in the hole.
Punching in Plastics
Punching in plastics fabrication usually refers to the removal of scrap plastic from the desired article. For example, in extrusion blow moldings it is common to use punching dies to remove tails, moldings flash (scrap plastic), and handle slugs from bottles or other molded containers.
About Characteristics of punching:
It is the most cost-effective process of making holes in the strip or sheet metal for average to high fabrication.
It is able to create multiple shaped holes.
Punches and dies are usually fabricated from conventional tool steel or carbides
It creates a burnished region roll-over, and die break on the sidewall of the resulting hole.
It is a quick process.
Types of Punch
In general, there are two different punching techniques, the conventional flat-bed punching, and the rotary punching. These two processes will be described in detail below.
A flat-bed punching unit consists of a press with an integrated punching tool. The punching tool usually contains an upper and lower tool. The tools are mounted parallel in linear guides and adjusted precisely so that the punches enter the dies correctly. The material web runs between the vertically moving tools. When the punches enter the dies, the whole punching pressure acts on the material at once (surface load). The punched waste is pushed into the dies and falls down vertically.
The material is fed into the punching unit intermittent, which means the feed motion of the material is interrupted for the punching. If the punched material needs further processing in future converting steps, the material feed needs to work precisely without any slippage or clearance. Otherwise, inaccuracy and register problems can occur.
The punching tools of a rotary punching unit are mounted either directly in high precision bearings or adjustable on two cylinders. The material web runs continuously between the two rotating tools.
Depending on the application, the entire punching unit can either be integrated into a machine frame or into a separate unit.
The tools rotate continuously when punching; therefore, the punch enters the die punctually. The punctual force requires a lower punching force than the flat-bed punching. The punched waste is removed by a hollow die cylinder or suctioned by a vacuum hub.
Uses of Punch:
Punching is mainly used to process round or profile holes into flat material, but it is also suitable for applications where waste removal can cause problems.
It is a separating technique, mainly used to process holes into flat materials like paper, plastic film, or sheet metals. Normally, the punching equipment consists of two tool parts – one support for the punches and one for the dies. While the punches enter the dies, the material is being sheared cut.
The following materials can be thin metal or plastic films and paper, but also thicker materials like packing materials, compounds, leather, and metal sheets used in the packaging, food, hygienic, medical and pharmaceutical industry.
Over the last years, punching became very important for the processing of metal foils for technically sophisticating products, e.g. for aerospace or electronics industry.
Working of Punching Principle
The concept of punching designates a slitting process in which a sheet is severed in one stroke. Shapes such as round holes are created in the part, and external contours are cut with single strokes.
A punching machine works like a hole punch for paper. The punch presses the paper against the support of the hole punch and finally into a round opening. The scrap from the punching collects in the hole punch container.
Punching works exactly the same way: the sheet is positioned between the punch and the die. The punch moves downward and plunges into the die. The edges of the punch and the die move past each other in parallel, cutting the sheet.
About Punching Tools
The Classic punching tool system is the leading tool system for punching and punches laser machines. Due to the broad range of forms, shears, coatings, and accessories, you can use it with flexibility and standard which is easy to use, and very simple.
About Punching tools and accessory
The Classic punching tool system is the leading tool system for punching and punches laser machines. Due to the broad range of forms, shears, coatings, and accessories, it with flexibility with the standard easy Use, simple set up is guaranteed. Multi-Tool makes your machine even more productive as it integrates up to ten different punchings and dies inserts in one tool. Its strengths really come into play during the processing of sheet metal parts with a variety of small punching operations.
Cutting sheets is one of the most important applications on a punching machine. The perfect solution from us with tools for normal slitting contours, for separating cuts on forms or for visible edges without nibbling marks. The ejector Multi-Tool is particularly suited to the reliable removal of small parts. If you would like to separate your finished parts directly from the remaining parts, the ejector tool for sorting is a perfect choice. With the patented film slitting tool with a ball tip, you can slit your films perfectly without leaving scratches or marks on the sheet – for every conceivable contour.
Forming tools enable you to deform the sheet metal parts which include the tapping tool for the cost-effective creation of chipless threads, the Multiband for bends up to 90°, or the roller tool for straight or curved forms in any length. It can also use a deburring tool and produce sheet parts on your punching or punch laser machine completely burr-free, thereby saving yourself costly post-processing. The size 5 tools also enable you to produce forms that are longer and higher than ever before.
The identification of sheet metal parts is becoming ever more important – whether for manufacturing, legal or quality reasons. In the process, you are creating transparency and documenting the responsibility of the manufacturer for the part they have produced. Using the engraving tool, you can mark sheet metal parts with flexibility in path mode and with the highest quality because the marking process does not produce chips. The Easy Type MultiTool is well suited for numerous different letters and numbers.
About CNC punching machine
Most common in industry are large computer-controlled punch press, called a CNC. These most commonly are of the 'turret' or 'rail' variety.
The CNC punching machine is basically programmed to move a sheet of metal in an x and y direction so as to accurately position the sheet under the machine's punching ram ready to punch a hole or form. ... By using a combination of single hits and overlapping geometries, complex sheet metal component shapes can be produced.
Punching Machine in Animation
Our most popular item is the Animation Paper Punch Machine. The manufacture of the product keeps the minutest detail in mind. The sturdy metal frame makes this Animation Paper Punch Machine durable and high performing. Our machines have the necessary capability to bring about customization based on specifications offered by clients. The infrastructure, technology, and human expertise have developed and design a varied range of 2D Animation products.
Customization based on specifications offered by the client
Type: Paper Punch Machine
Automatic Grade: Semi-Automatic
About Tapping Machine for Art color
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