Sliding
friction occurs when the sliding bearing works; the magnitude of the
rolling friction mainly depends on the manufacturing precision; and the
frictional force of the sliding bearing mainly depends on the material
of the sliding surface of the bearing. The sliding bearing generally has a self-lubricating function on the
working surface; the sliding bearing is divided into a non-metallic
sliding bearing and a metal sliding bearing according to the material.
Non-metallic
sliding bearings are mainly made of plastic bearings. Plastic bearings
are generally made of engineering plastics with better performance. More
professional manufacturers generally have self-lubricating technology
for engineering plastics, through fibers, special lubricants, glass
beads. The engineering plastics are self-lubricating and modified to achieve a
certain performance, and then processed into a self-lubricating plastic
bearing by injection molding with modified plastic.
Metal
sliding bearings are currently the most commonly used three-layer
composite bearings. These bearings are generally made of carbon steel as
the substrate. Sintering technology first sinters a layer of spherical
copper powder on the steel plate, and then sintered a layer on the
copper powder layer. 0.03mm PTFE lubricant; the main role of the middle layer of spherical
copper powder is to strengthen the bonding strength between the steel
plate and PTFE, of course, also play a certain load bearing and
lubricating effect;
In
recent years, a number of outstanding small and medium-sized
enterprises have also emerged in the world's sliding bearing
manufacturing base. The comprehensive strength of large enterprises is
strong. With the development of the sliding bearing industry, the
industry segmentation is becoming more and more obvious, and SMEs are
gradually shortening. The gap between big companies.
Through
the above description, it is not difficult to see that the plastic
bearing and the metal sliding bearing have the following differences: 1.
The plastic bearing is a lubricating material as a whole and has a long
service life; while the metal sliding bearing lubricating layer is only
a surface of 0.003 mm of PTFE, when this is thin The
first layer of friction will declare the end of service life; 2. The
plastic bearing will not rust and corrosion during use, and the metal
bearing will be easy to rust and cannot be used in chemical liquid; 3.
The quality of plastic bearing is better than metal. Light,
this is more suitable for modern lightweight design trends; 4, plastic
bearing manufacturing costs are lower than metal; plastic bearings are
injection molding processing is more suitable for mass production; 5,
plastic bearings in operation without any Noise,
has a certain vibration absorption function; Because plastic bearings
have many advantages over metal sliding bearings, the output of plastic
bearings is expanding, and the use of plastic bearings is also
constantly expanding, from fitness equipment to office equipment and the
automotive industry. Plastic bearings are used, and cars driving on the road do not use plastic bearings. The market prospect of plastic bearings is infinitely broad!
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