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Introduction to locating pins
Release time:
2022-03-03
Locating PinYesParts involved in limiting the degree of freedom of objects have certain applications in some mechanical motion equipment, mainly used for positioning in two-dimensional space. The positioning pin takes the workpiece hole as the positioning reference, participates in the parts that limit the degree of freedom of the object, and controls the object inX, Y, Z three axis, six axis of linear motion. Free movement around X, Y, and Z rotational movement. In a mold composed of two or more parts, a pin used to position two adjacent parts of the mold.
When the body is connected by multiple parts, and each part needs to be maintained during processing and assemblyAccurateLocating pins should be used for positioning. For example, the split box is composed of a cover and a base, and the machining accuracy of the upper Bearing hole is required to be high. Therefore, in the design, the two positioning pins should be set at a far apart position on the split surface to ensure its processing and assembly accuracy.
Features of the locating pin：
1. The positioning pin has the characteristics of simple structure, good neutrality, high carrying capacity, good variable load and impact performance, but the positioning pin has high requirements for the processing accuracy of the mating surface.
2. The disassembly and assembly force of the 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.
Locating PinofApplicable occasions：
The positioning pin is 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 positioning pin is easy to disassemble and assemble. The positioning accuracy of the threaded positioning pin is relatively low, and it is mostly used in occasions where the accuracy requirement is not high.
The elastic locating 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. It is suitable for occasions with impact and vibration, and can replace some cotter pins, positioning pins, pins 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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