Introduction to Ceramic Positioning Pins

As far as we know, the function of positioning pins is to limit the free movement of items. Compared to traditional material positioning pins, the advanced ceramic materials used by ceramic factories have a greater advantage,

For example, zirconia ceramic positioning pins, alumina ceramic positioning pins, and silicon nitride positioning pins.

There are 5 types of positioning pins: 1. Fixed positioning pins

2. Interchangeable positioning pin

3. Cone locating pin

4. Edge cutting positioning pin

5. Standard diamond positioning pin

The function of a positioning pin is to limit the free movement of an item. Degrees of Freedom: Any object in space must have six degrees of freedom, with linear motion along the X, Y, and Z axes, as well as rotational motion around X, Y, and Z. A positioning pin is a component that participates in limiting these degrees of freedom. A pin designed to accurately locate adjacent parts of a mold composed of two or more parts. On the spindle positioning, 1) the mechanical cam mechanism (2) the photoelectric disc method is used for coarse positioning, and then a hydraulic or pneumatic positioning pin is inserted into the pin hole or groove on the spindle to achieve precise positioning. After the tool change is completed, the positioning pin exits and the spindle begins to rotate.

Ceramic positioning pins have extremely strong corrosion resistance and can also be used in strong acids, alkalis, and seawater. At 1100 ℃, the strength and hardness remain almost unchanged. It can also be used in non magnetic and magnetic fields. Electrical insulation. The density is 3.25-3.28g/cm3, with a light weight, about 60% lighter than steel balls, greatly reducing the centrifugal force on the channel during high-speed rotation of the bearing and reducing wear. High rigidity, high strength, twice the hardness of bearing steel, and about 1/3 higher elastic modulus. The linear expansion coefficient is 3.2 × 10-6/K, almost 1/4 of the bearing steel, can withstand sharp temperature changes.

(1) Performance characteristics:

1. Ceramic positioning pins, similar to ordinary welded positioning pins, are made of superhard silicon nitride ceramic material. The special physical and chemical properties of ceramic materials determine certain special properties of silicon nitride positioning pins. For example, excellent properties such as high wear resistance, high hardness, non-conductive, non magnetic, non adhesive welding slag, etc.

2. Below, I will briefly introduce the properties of ceramic materials:

High hardness: Zirconia has a hardness second only to diamond

High wear resistance: High hardness and good red hardness determine the excellent wear resistance of zirconia positioning pins

High cost-effectiveness: The service life of zirconia positioning pins is more than 10 times that of ordinary positioning pins

(2) Application field:

Ceramic materials such as zirconia and silicon nitride are high-temperature wear-resistant and used as mechanical components, rotors, stators, etc. in engines; Hot pressed piston crown, reaction sintering burner, spark plug, cylinder sleeve and other precision parts; Good thermal shock resistance, used as thermowells, ceramic positioning pins, molds, crucibles, furnaces, combustion nozzles, heating fixtures, furnace liners, aluminum liquid conduits, valves, etc; Good corrosion resistance, used as ball valves, sealing rings, filters, heat exchanger components, etc. in chemical industry; Good wear resistance, used as bearing balls, rollers, seat rings, high-temperature bolts, plunger pumps, sealing materials, etc. in the mechanical industry; It is used in electronic, military and nuclear industry as circuit substrate, film capacitor, high-temperature insulator, radar radome, insulator, etc.

Our ceramic factory can customize various non-standard shaped ceramic positioning pins and special purpose shaped ceramic positioning pins according to the customer's usage environment, usage requirements, and required material properties.

Website: https://www.zhengtaifeng.com/