Basic concept and classification of position pins

Ceramic position pin is a part used to fix or locate the position of the workpiece, it is usually composed of two parts of the same diameter, one part is fixed on the basis of the shaft, the other part is inserted into the workpiece pin, Ceramic position pin used to achieve the purpose of fixing and positioning. According to the shape and characteristics of the ceramic position pin, it can be divided into the following categories:
1. Cylindrical ceramic position pin: a common type of positioning pin, usually used to locate the position of the hole.
2. Conical ceramic position pin: generally used in conical holes or cylindrical holes to realize the positioning and fixing of the workpiece.
3. Elastic ceramic position pin: due to the existence of elastic materials, it can play a certain buffer role in positioning.

Features of ceramic position pin:

1). Maximum use temperature up to 1100C
2). High density
3). High bending strength and breaking tenacity
4). Low thermal conductivity( 20% that of alumina)
5). Chemical inertness
6). Resistance to molten metals
7). Ionic electrical conduction
8). Wear resistance
9). High fracture toughness
10). High hardness

How to choose the ceramic position pin

Choosing the right dowel needs to consider the following factors:
1. Geometry and size of the workpiece.
2. Positioning and fixing requirements of the workpiece.
3. Type, material and surface treatment of positioning pins.
4. Temperature, humidity, corrosion and other factors of the working environment.

Through the comprehensive consideration of these factors, the most suitable positioning pin can be selected to ensure the accuracy and stability of the work.

Zirconia ceramic (ZrO2, Zirconium Oxide) is an ideal techncial ceramic for structural parts, it has relatively high fracture toughness among all technical ceramics， overcoming the inherent brittleness of ceramics to some extent. Zirconia ceramic also has very high hardness, mechanical strength and wear resistance in room temperature and will increase the service life of workpiece greatly. , zirconia ceamic is widely applied for structural ceramic parts or wear resistant parts make ceramic valve components, ceramic utility blades, ceramic grinding media, ceramic pump plungers, ceramic bearings and so on.