Hinges

Hinges

Today I will talk to you about the most important piece of hardware-hinges, the knowledge of hinges under in-depth science.

1. The role of hinge

Hang up the door leaf support to realize the free rotation of the door leaf. Some special types of hinges realize some additional special functions, such as thread-passing hinges, self-closing hinges, etc.

2. What are the types of hinges

Hinges are divided into different categories, which can be divided into

Adjustable hinge and non-adjustable hinge

Removable hinges and non-removable hinges

One-way hinge and two-way hinge

Fireproof hinges and non-fireproof hinges

Surface mounted hinges, embedded hinges and hidden hinges

Hinges for steel and wood doors, hinges for narrow-frame profile doors and hinges for full glass doors

Jack-up hinges, anti-theft hinges, medical hinges, cable-passing hinges, etc.

3. The main performance indicators of the hinge

The most important performance index of hinge is load-bearing performance, which is generally 10Kg as a grade unit. Other performance indicators of hinges include service life, corrosion resistance, etc., according to different standard systems and test methods, there are different indicators. For example, in the European standard, there are requirements for the amount of deformation after the life test; and there are more stringent requirements for resistance to elastic deformation and plastic deformation.

4. Is the load-bearing performance of the hinge related to the size of the hinge?

The physical size of the hinge is related to the load-bearing performance of the hinge. Generally speaking, for hinges with load-bearing performance, the values of hinge height, hinge shaft diameter and sheet thickness will be larger.

5. Why should the hinge be greased?

For some hinges, in order to lubricate the hinge core and reel, and reduce friction, it is necessary to add grease between them; in addition, in the case of insufficient machining accuracy, the gap between the hinge core and the reel is relatively large, so if no grease is added , The hinge leaf shakes a lot, so add grease to compensate.

6 Why does the greased hinge show black grease after a period of use?

After the hinge has been operated for a period of time, the viscosity of the grease added in the hinge is reduced and it is easier to flow out; at the same time, the shaft core and reel of the hinge will be worn to different degrees. When the wear is more serious, more black iron powder will be produced. Grease is blackened. Therefore, the greased hinge may have transparent or black grease flowing out sooner or later, depending on the oil used and the processing accuracy, which affects the appearance to varying degrees.

7 What impact does the operating environment have on the hinge?

The requirements for hinges are different depending on the use environment. For example, in large public buildings, the use frequency of doors is very high, and the size of general doors is relatively larger, so it is necessary to choose hinges with high load-bearing performance and long service life. For example, in the seaside or storage of certain series of chemical applications, there are higher requirements for the corrosion resistance of the hinge, and it is necessary to choose a hinge with a special material or a corrosion-resistant surface treatment.