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Do you understand the knowledge of commonly used cylindrical positioning pins
Release time:
2022-04-01
Positioning pin is a very wide range of parts in the mold manufacturing industry, including stamping molds, injection molds, etc. The precision of the mold is very high. If the template is only fixed with bolts, it will definitely not work, so only positioning pins can be used to achieve the purpose of positioning, or to prevent the installation position and direction from being wrong. Cylindrical positioning pins are commonly used positioning pins. What are its characteristics? This time, let's take a look at the cylindrical positioning pin.
What is a cylindrical pin?
The cylindrical locating pin (spring pin) is a headless hollow cylinder, axially slotted and chamfered at both ends. It is used for positioning, connection and fixing between parts; it needs to have good elasticity and shear resistance. The outer diameter of these pins is slightly larger than the diameter of the mounting hole.
Features of cylindrical positioning pin:
1. The cylindrical positioning pin has the characteristics of simple structure, good neutrality, high carrying capacity, good variable load and impact performance, but the cylindrical positioning pin has high requirements for the machining accuracy of the mating surface.
2. The disassembly and assembly force of the cylindrical positioning pin is large, which will scratch the mating surface and is an undetachable connection. When the interference is small or the use of hydraulic disassembly, the connection is also removable.
Cylindrical positioning pin applicable occasions:
Cylindrical pins are suitable for positioning and can also be used for connection. Different matching requirements can be selected, and different diameters have different tolerance requirements; the pin hole needs to be hinged, and repeated disassembly and assembly will reduce the positioning accuracy and connection tightness of the pin, which can only be used to transmit smaller loads. The internal thread of the internal thread cylindrical positioning pin is easy to disassemble and assemble. The positioning accuracy of the threaded cylindrical positioning pin is relatively low, and it is mostly used in occasions where the accuracy requirement is not high.
The elastic cylindrical positioning pin is elastic. After inserting the pin hole, it is close to the hole wall and is not easy to loosen. Low pin hole accuracy. Interchange holes can be disassembled and assembled many times, with poor rigidity, Suitable for occasions with shock and vibration, can replace some cotter pins, cylindrical positioning pins, Pin shaft or tapered pins. The hole pin and Pin shaft can be locked with another cotter pin, which is easy to disassemble and is suitable for hinges.
Key words:
Locating Pin
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