Introduction
High-pressure waterjet perforation, also known as Waterjet peening, is an effective method of applying force to the surface of a material in order to induce the formation of various shapes, textures or indentations. It is a process used to create a unique pattern on a material surface that has the potential to increase the surfaces strength, reduce stress and improve its overall resistance to wear and tear.
Overview
Utilized since the 1970s by professionals such as metal fabricators and engineers, high-pressure waterjet perforation is a surprisingly versatile technique. Depending on the application, the process can be used to surface the material, cut debris from surface, modify surface features, improve friction, or simply enhance the overall surface appearance. Since it does not require any mechanical tools or welding operations, the process is fast, efficient, and can be easily adapted to specific projects and needs.
Process
After selecting a suitable waterjet nozzle, the operator places the material in a pressurizer. The pressurizer pumps high-pressure water (in the range of 4400-11,000 psi) through the nozzle, to the material surface. The waterjet peening process has multiple steps which include: pre-treatment of the material to be perforated in order to remove contaminants or rust scale, priming of the material surface with a lubricant, selecting a suitable waterjet device based on the material properties, selecting and setting suitable level of pressure and flow rate, controlling peening angle and speed of the nozzle movement, and finally, adjusting the pressure and flow rate to achieve adequate material penetration.
Benefits
The greatest benefit of using high-pressure waterjet perforation is that it offers a variety of options for accurately creating and customizing a wide range of patterns and designs on a given material surface—far beyond those achievable by mechanical or welding processes. The process is also relatively safe and cost effective. Additionally, the process creates less waste, since no cutting or drilling is required, and does not involve the use of toxic liquids or hazardous materials.
Conclusion
High-pressure waterjet perforation is a versatile and cost-effective method of creating a variety of shapes, textures, and indentations on any material surface. By providing an alternative to traditional mechanical and welding processes, the process is fast, efficient, and can be easily customized to a wide range of material surfaces and specific project needs. Additionally, the process can be used to modify surface features, improve friction, and increase a material’s overall strength and resistance to wear and tear. For these reasons, the process is often favored by engineering and metal fabrication professionals.
