What Cannot Be Cut By Waterjet?

What Cannot be Cut by Waterjet?

Waterjet cutting is a versatile and efficient technique used in various industries. It involves using a high-pressure stream of water to cut through different materials. However, there are certain materials that cannot be cut by waterjet due to their unique properties and characteristics. In this article, we explore these materials and understand why waterjet cutting is not suitable for them.

Waterjet Cutting Overview:

Before diving into the materials that cannot be cut by waterjet, let''s first understand how waterjet cutting works. Waterjet cutting is a non-thermal process that uses a high-pressure stream of water, sometimes mixed with abrasive particles, to slice through different materials. The waterjet is typically pressurized to about 60,000 PSI (pounds per square inch) or higher, which helps in achieving precise and clean cuts.

Waterjet cutting is known for its ability to cut through a wide range of materials, including metals, plastics, composites, stone, glass, and more. Its versatility makes it a preferred choice for many industries, such as aerospace, automotive, manufacturing, and architecture. Despite its efficacy, there are a few materials that prove to be challenging for waterjet cutting.

Materials that Cannot be Cut by Waterjet:

1. Tempered Glass:
Tempered glass, also known as toughened glass, is a type of safety glass that undergoes a specialized heat treatment process. This treatment strengthens the glass, making it more resistant to impact and thermal stress. However, the unique properties of tempered glass make it highly resistant to cutting with a waterjet. Waterjet cutting can cause the glass to shatter into small, potentially dangerous pieces.

2. Diamond:
Diamonds are the hardest known natural substance and have a reputation for their exceptional hardness. Because of their extreme hardness, waterjets are unable to cut through diamond material effectively. Diamond tools that cut diamonds are often used instead to shape and polish rough diamonds.

3. Hardened Steel:
Hardened steel is a type of steel that has undergone heat treatment to increase its strength and durability. This process involves heating the steel material to a high temperature and then rapidly cooling it. The high hardness of hardened steel makes it difficult for waterjets to cut through the material effectively.

4. Carbon Fiber Reinforced Polymer (CFRP):
CFRP is a composite material composed of carbon fibers embedded in a resin matrix. It is known for its high strength-to-weight ratio and is commonly used in aerospace and automotive industries. While waterjet cutting can be used for CFRP, it is not the most efficient method due to its abrasive nature, which wears down the waterjet nozzle quickly.

5. Heat Resistant Metals:
Metals with high melting points and excellent heat resistance, such as tungsten and molybdenum, cannot be easily cut by waterjet. These metals require specialized cutting techniques and tools due to their extreme heat resistance properties.

6. Bulletproof Glass:
Bulletproof glass, also known as ballistic glass, is designed to resist penetration from projectiles such as bullets. This specialized glass is made up of multiple layers of glass and plastic, creating a laminated structure. Waterjet cutting is not suitable for cutting through bulletproof glass, as it can compromise its integrity and ballistic resistance.

7. Stone:
Natural stones like granite and marble are beautiful yet challenging to cut using waterjets. While waterjets can be used to shape and profile stone surfaces, cutting through thick stone blocks efficiently requires alternative methods like diamond saws.

Conclusion:

Waterjet cutting is a versatile and efficient method used in various industries for cutting a wide range of materials. However, there are certain materials that cannot be cut effectively with waterjet due to their unique properties. Tempered glass, diamonds, hardened steel, carbon fiber-reinforced polymer, heat-resistant metals, bulletproof glass, and stone are examples of materials that present challenges for waterjet cutting. Understanding these limitations helps in choosing the right cutting method for specific materials and applications, ensuring precise and efficient results.