We believe that every day will come into contact with a variety of glass products, such as glasses, glass doors, glass windows and so on. Although we are in constant contact with them, we do not know much about the types and properties of these glasses. Because of the lack of understanding of glass materials, often lead to a variety of problems. We will explain why toughened glass can not be cut to help you understand more.

Can't the toughened glass be cut?

1.The finished toughened glass are not to be cut. All the toughened glass were made before they were tempered.

2.A toughened glass is a Tempered glass. The toughened glass is a kind of pre-stressed glass. In order to improve the strength of the glass, chemical or physical methods are usually used to form compressive stress on the surface of the glass. When the glass is subjected to external forces, the stress on the surface of the glass is first counteracted, therefore, the bearing capacity is improved, and the wind pressure resistance, heat and cold resistance and impact resistance of the glass are enhanced.

Glass tempered grade

1. Toughened glass: tempering degree = 2 ~ 4ncm, surface stress of glass curtain wall toughened glass ≥95mpa;.

2.Toughened glass: tempering = 2NCM, surface stress of glass curtain wall toughened glass 24Mpa ≤ α ≤69mpa.

3. Super Toughened Glass: Steel Strength & GT. 4NCM.

Why Can't the toughened glass be cut

Can U-shaped glass be cut

Unlike ordinary glass, toughened glass glass is made by treating it at a high temperature of 600 to 700 degrees and then rapidly and evenly cooling it. Like steel quenching, the surface of the glass forms a uniform and dense compression force, it's like putting an invisible steel armour on the glass, making it much stronger. But the hardened toughened glass can not be cut.

Because the internal stresses in the toughened glass are balanced, the molecules are tense, and if one place breaks the equilibrium, the whole glass collapses. So, when you make a toughened glass, you have to determine its size and shape before you make it.

Toughened glass

1. Safety: glass is broken into small blunt angle particles like honeycomb, which will not cause serious harm to human body.

2. Bending strength: the bending strength of toughened glass glass is usually 3-5 times that of ordinary glass.

3. Deflection: 3-4 times larger than normal glass.

4. Thermal stability: the toughened glass has good thermal stability and can withstand sudden temperature changes in the range of 250-300 ° C, while the normal thickness of glass can only withstand temperature changes of 70-100 ° C.

Related concepts

Cut

Cutting is a physical act. The narrow sense of cutting refers to the use of knives and other sharp objects (such as food, wood and other less hard objects) cut; the broad sense of cutting refers to the use of tools, such as machine tools, flames and other objects, cause an object to break under pressure or high temperature. Mathematics also has the extension of the“Cutting line”, refers to a plane can be divided into several parts of the line. Cutting in people's production, life has an important role.

Stress

When a body deforms due to an external cause (force, humidity, temperature field, etc.) , the internal forces that interact between the various parts of the body are generated to resist the action of such an external cause, and try to make the object from the position after the deformation to the position before the deformation. The internal force per unit area at a point in the cross-section under consideration is called a stress. Perpendicular to the cross-section is called normal or normal stress, and tangent to the cross-section is called shear or shear stress.