Wear-resistant high-hardness insulating ceramic positioning pin
Product Overview
Positioning pins are most widely used in molds. Including stamping
molds, injection molds and so on. Their precision is particularly
high, and if it is only fixed by bolts, it will definitely not
work, so only positioning pins are used to achieve positioning
The ceramic positioning pin has extremely strong corrosion
resistance, and can also be used in strong acid, strong alkali and
sea water. At 1100 ℃, the strength and hardness are almost
unchanged. Can also be used in non-magnetic and magnetic fields.
Electrical insulation. The density is 3.25---3.28g/cm3, light
weight, about 60% lighter than the steel ball, which greatly
reduces the centrifugal force on the channel when the bearing
rotates at high speed and reduces wear. High rigidity, high
strength, its hardness is twice as high as bearing steel, and the
elastic modulus is about 1/3 higher. The coefficient of linear
expansion is 3.2×10-6/K, which is almost 1/4 of the bearing steel,
and can withstand the rapid changes in temperature.
There are 5 types of positioning pins:
1. Fixed positioning pins
2. Interchangeable positioning pins
3. Cone positioning pin
4. Cutting edge positioning pin
5. Standard diamond positioning pin
Product parameter table
Material
Project | Alumina AL203 | Silicon carbide sic | Silicon nitride sin | Silicon nitride sin |
| Color | Ivory | black | black | Milky white, gray black |
| Content(%) | 99.5 | …… | …… | …… |
| Main features | - Excellent high frequency electrical insulation
Good wear resistance preservative Strong High hardness
| - Good high temperature strength
- High thermal conductivity
- Strong alkali resistance
- Wear-resistant
- Lightweight
| - Good high temperature strength
- Strong impact resistance
- Strong corrosion resistance
- Lightweight
| - High strength and high impact resistance
- Good self-lubricating
- Strong alkali resistance
- Smooth surface
- Good toughness
|
| The main purpose | - Wear parts
- High temperature parts
- Corrosion resistant parts
| - Machinery Seal
- Sliding parts
- High temperature parts
| - Molten metal parts
- Metal plasticity
- Processed parts
| - Industrial knives
- Pump parts
- Wear parts
|
| Density | Kg/m³ | 3.9*10 | 3.16*10 | 3.3*10 | 6.0*10 |
Mechanical behavior
| Vickers hardness | Gpa | 16.0 | 23.0 | 14.0 | 13.2 | 12.7 |
| Flexural strength | Mpa | 360 | 450 | 1020 | 1000 | 1470 |
| Compressive strength | Mpa | 2350 | …… | …… | …… | …… |
| Fracture toughness | Mpa | 4 | 2-3 | 7 | 4-5 | 4-5 |
Thermal performance
| Linear expansion coefficient | 40-400℃ | ×10-5/℃ | 7.2 | 3.7 | 2.8 | 10.5 | 10.8 |
| 40-800℃ | 8.0 | 4.4 | 3.3 | 11.0 | 11.3 |
| Thermal conductivity | W/(m·k) | 32 | 200 | 27 | 3 | 3 |
| Specific heat | J/(kg·k) | 0.78*10 | 0.67*10 | 0.65*10 | 0.46*10 | 0.46*10 |
| Thermal shock resistance (in water) | ℃ | 250 | …… | ＞800 | 300 | 350 |
| Electrical performance | Dielectric strength | V/m | 15*105 | …… | 13*105 | 11*105 | …… |
| Volume resistance(20℃) | Ω·cm | ＞1014 | 108 | 1014 | 1013 | …… |
| Dielectric constant | …… | 9.6 | …… | 9.9 | 33 | …… |
| Loss factor | ×10-4 | 10 | …… | …… | 520 | …… |
Product advantages
Performance characteristics:
1. The ceramic positioning pin is similar to the ordinary welding
positioning pin, but it is made of super-hard silicon nitride
ceramic material. The special physical and chemical properties of
ceramic materials determine certain special properties of silicon
nitride positioning pins. For example, high wear resistance, high
hardness, non-conductive, non-magnetic, non-stick welding slag and
other excellent properties.
2. Below I will briefly introduce the performance of ceramic
materials:
High hardness: the hardness of zirconia is second only to diamond
High wear resistance: High hardness and good red hardness determine
that the zirconia positioning pin has excellent wear resistance
High cost performance: the service life of zirconia positioning
pins is several times that of ordinary positioning pins
The role of ceramic positioning pins is to limit the free movement
of items. Degrees of freedom: When an object is in space, it must
have six degrees of freedom, linear movement in the three axes of X
Y Z, and rotational movement around X Y Z. Positioning pins are
parts that participate in limiting these degrees of freedom. In a
mold composed of two or more parts, a pin designed to accurately
position the adjacent two parts of the mold. In the spindle
positioning, 1) mechanical cam mechanism (2) rough positioning by
photoelectric disk method, then a hydraulic or pneumatic
positioning pin is inserted into the pin hole or pin groove on the
spindle to achieve precise positioning, and the positioning pin
exits after the tool change is completed , The spindle starts to
rotate.
Applications
- Shipbuilding, bridges, large-scale structural facilities
- Lighting industry
- Electronics and electric heating industry
With the development of science and technology and the improvement
of manufacturing technology, new varieties continue to appear, and
they will be used more and more in the fields of modern industry
and modern science.
Ceramic positioning pins can be applied to accessories for special
purpose parts of high temperature resistance, corrosion resistance,
wear resistance, and high voltage resistance used in industries
such as electronics, machinery, chemical industry, metallurgy,
textiles, and power.
Product Picture
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Product packaging
Packed in carton
FAQ
1. Are you a businessman or a manufacturer?
We are a company, we have our own factory
2. How long is your delivery time?
Negotiable
3. Can the product be customized?
Can be customized
4. What is the product packaging?
Carton or according to customer requirements
