Nibbler

As Nibbling ( also punching) a production method for punching and machining of sheet metal workpieces from steel plates is called. It is characteristic of this method is that with a lot of times, CNC-controlled using a simple shaped tool complex shapes to be cut out in the rule.

Pros and Cons

A particular advantage of the nibbling compared to laser cutting, is the possibility of carrying out metal forming processing steps using the same processing machine. It is common, with elements such as plates ( ventilation ) Gill, trains, etc. By equipping in practice ( see figure). Modern nibbling, the tool holder has an axis of rotation, can even form thread. When thread, the material is displaced and thereby created without cutting the thread. Thread forms has advantages over threading: Disabled Firstly, the thread can be loaded higher, also arises in the manufacture no chip, the following edits.

Standard tools

The power tools are also called Nibbler, Nibbler or rodents. Standard amenities include Punching a stamp with the most important, simple geometric shapes such as circle ( the tool is often called circular temple ), square, rectangular or oblong hole. For cutting of circular apertures are also arc-shaped stamp use, which produce a smooth circle with a few strokes.

The most frequently encountered, complex geometries in the sheet metal blank, such as D -Sub connector or other openings are generally punched with a special tool for this form.

Distortion-free cutting of metals is the advantage of these tools. Like a punch is the cutting tool from the punch and die. In this separation technique generates waste, the device punch a cutting track.

In addition to cutting sheet metal notching are the specialty of this tool. The necessary cut-outs for internal pilot hole must match the diameter of the die. Round stamp permit tight turns, it creates crescent waste. The shape and width of a cutting trace arises from the nature and size of the stamp. Thus is also measured by the loss of material that arises when punching. Wave and trapezoidal sheets can be separated with nibbling, nibblers and rodents. In contrast to the scissors cutting track is free from faults. Power cable or battery power the drive motor with energy.

Special Tools

In the ( large) mass production, such as control cabinets, will also often use special tools that can cut full contours with a few strokes tool.

A special form of the tool is the so-called multi-tool dar. Here several punching tools are on a head mounted and can be addressed by turning ( so-called indexing ).

Machinery

Modern, NC - controlled punch - nibbling machines are characterized by high productivity (compared to laser cutting ) lower unit costs. However, any arbitrary contours can be cut.

Combination machines

To combine the advantages of nibbling with those of laser cutting, different manufacturers also offer a combination of machines, enable both metal forming operations with the punch head and the laser machining any contours.

Another type of Nibblers combines this with the technology of plate shears to perform the frequently obtained in the long straight sections optimized can.

• Separate
• Separation tool