How does waterjet cutting work?
Water jet cutting is an abrasive separation process. A distinction is made between the pure water jet cutting and abrasive water jet cutting by adding powdery material. The plants are the Laser cutting machines and plasma cutting machines very similar, where here the cutting is done by water and possibly added additives.
Pure water jet cutting is mainly used for soft materials such as plastic films or foams and is of little relevance in mechanical and plant engineering. By adding abrasives, the cutting ability of the water is further increased, so that water jet cutting can also be used for hard materials such as steel, glass or ceramic materials.
As a rule, water jet cutting takes place along a flat contour, such as a sheet metal. With the latest product technology, this cut can also be done in 3D. 3D technology is used when cutting turbine blades, fan wheels and various types of three-dimensional components.
The big advantage of water jet cutting is the minimal heat input to the surface of the component to be cut, which does not damage the surrounding structure of the component. Thus, the range of applications of water jet cutting is more versatile and it can be cut in addition to metals and glass, tiles, ceramics, granite, marble, wood, plastic, Plexiglas or rubber. Another big advantage of water jet cutting is the cutting of precise and very complicated contours, so that no post-processing is required. In most cases, the components can be processed immediately. The machining step of deburring is usually omitted.
The company ATP Technologies from Tököl, south of Budapest, 2D offers water jet cutting on a KMT NeoLine i40 OEM system with 3.800bar.
With this machine it is possible to create very precise contours in epoxy resin sheets, as you can see from the data of a reference component provided:
An 1,5mm thick epoxy board was processed with the following properties:
|Density||ISO 1183 / A||g / cm3||approx. 2.0|
|Flexural strength at 23 ° C||ISO 178||MPa||400|
|Flexural modulus of elasticity||ISO 178||MPa||approx. 18000|
|Impact strength (Charpy) paralell to lamination||ISO 179 / 3 C||kJ / m2||50 - 100|
|Tensile strength||ISO 527||MPa||220|
|Compressive strength perpendicular to laminations||ISO 604||MPa||500|
|Breakdown voltage at 90 ° C in oil perpendicular to laminations||IEC 243||kV||40|
The cutting speed was 800mm / min at a pump pressure of 3.800 bar. For waterjet cutting, an accuracy + 0,1mm was maintained in a contour with 13mm radius.
More information and contact details for ATP Technologies can be found here here.