Friction and wear testing machines can be classified into different categories according to their properties. Among them, the movement of friction pairs can be divided into four categories: sliding friction, rolling friction, rolling friction and rotational friction. Among these classifications, sliding friction is the most used. The following constant Xu Xiaobian and everyone together to learn about the relevant knowledge.

First of all, we need to know what sliding friction is. The popular point is that the two contact surfaces impede the relative sliding between them, and all contact points have different speeds. Sliding friction between objects is called dynamic friction. Sliding friction is called static friction when there is a trend of sliding between objects and not yet sliding. This is the most common form of friction at present. Nearly 90% of the friction pairs are tested in this way.

Secondly, we introduce the different contact modes and the corresponding testing machines.

1. four ball: the mechanism is mainly composed of four balls (1 Balls 3 down the ball). The top one is stuck in the chuck, and the three balls below are fixed. The upper ball is in contact with the lower ball. When working, the upper ball is driven by the main shaft to rotate, and the ball is loaded by the loading system - the four ball friction and wear tester.

2. ring block type: mainly composed of two parts, metal ring and rectangular test block. Through the choice of the ring, the test block is rubbed - ring block friction and wear tester.

3. pin disc type: a pin and a disc, pin fixed, direct contact with the disc, plate to choose motion - end friction and wear test machine, vertical universal friction and wear test machine.

Knowing some basic knowledge about various friction and wear testing machines will help us to understand and use the equipment. Although only some basic knowledge, but Heng Xu Xiaobian still hope that you can have a little help for you. If you need more professional knowledge about electronic universal testing machines and friction and wear testing machines, please pay more attention to Heng Xu website kdthfojww.cn or call hotline 0531-85860713.