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Dowel pins ISO 2338 manufacturers take you to understand the common types and methods of positioning pins

Dowel pins ISO 2338 manufacturers take you to understand the common types and methods of positioning pins

(Summary description)Dowel pins ISO 2338 manufacturers tell you that positioning pins are very common for mechanical designers, and they are very useful. First, let’s introduce the positioning pins.

Dowel pins ISO 2338 manufacturers take you to understand the common types and methods of positioning pins

(Summary description)Dowel pins ISO 2338 manufacturers tell you that positioning pins are very common for mechanical designers, and they are very useful. First, let’s introduce the positioning pins.

Information

Dowel pins ISO 2338 manufacturers tell you that positioning pins are very common for mechanical designers, and they are very useful. First, let’s introduce the positioning pins. The positioning pins are actually an informal name and a strict name. It is a pin, a connected component used to precisely limit the position and coordinates of the part, usually only the two components that need to be matched will need to be added.

Low price Dowel pins ISO 2338 supplier(s) china
Dowel pins ISO 2338 The manufacturer tells you that the positioning pin has a second function, which is to replace and install the spare parts that have precise position requirements and are replaced more frequently (some are called wearing parts). If there is no positioning pin, that's quite a hassle to figure out where it was originally.
Locating pins can be divided into many types according to their classification. Since they are said to be pins, they are generally round and have a diameter of the main body. There are many kinds, for example: one end is round and the other end has threaded teeth. This is a guide pin, which is commonly used for two parts that are often separated and combined. Of course, some of the relative position tolerances are too large, and the circle used is difficult to ensure. Pins can be inserted.
Dowel pins ISO 2338 The manufacturer tells you that this kind of pin can be used with a tapered pin. The head is also round, but it is relatively small, and it is easy to align the product with the hole offset. There are also some that the diameter of the top is larger than that of the bottom, and that of the bottom is larger than that of the bottom. The above is small, and there is even a small flange in the middle. This difference in shape can be applied to different occasions, but the purpose is one, that is, the two parts are often clutched.
Let’s talk about its tolerances. Normal pins have a connection function, and tolerances can be set according to requirements. There are three types of fit, one is clearance fit, which means that no matter how big the hole is, the shaft can be easily inserted. It can even be slidable, and some people call it a sliding fit.
Dowel pins ISO 2338 manufacturers tell you that the corresponding interference fit is the interference fit, that is, the hole cannot be put in regardless of whether the upper tolerance or lower tolerance shaft is made. This kind of fit is less used in the era of metal being king. In general use, it is also assembled with the temperature difference. For example, relatively precise shafts and bearings need to be heated and the shafts must be refrigerated to match.
The other is transition fit, that is, when the hole achieves the upper tolerance, and the shaft achieves the lower tolerance, it is a clearance fit, otherwise it is an interference fit. This kind of fit between the pin and the pin hole is its classic application. To achieve the function of the product as desired, but also to facilitate installation, of course, this also involves a processing problem.
Dowel pins ISO 2338 manufacturers tell you that generally speaking, the processing of national holes is made with circular tools, and in the process of making tools, in order to make them more versatile, the production is generally based on integer diameters. In this way, plus the runout of the machine tool, the hole is only made into a positive tolerance, of course, the tool wear is another matter.
However, in the production process of the shaft (pin), we will first remove the bar material. Generally speaking, the bar material will have a certain tolerance in the forming process, but in the processing link, it is generally either circular grinding or lathe processing. As the material becomes thinner, it is easy to make a negative tolerance, which forms a natural matching relationship.
Finally, let me tell you how to install the pins. There are always four ways to install the pins. The first one is the side pin, which is mainly to punch one or several pins around the part to limit its front, back, left and right. The part only controls two directions. Some people think that the amount of finishing is too large, and only one side pin is made in each direction.
The second is blind pin, that is, the pin hole does not penetrate when it is made by a tool. As long as two pin holes are made, and two points are set on a line, the parts can be positioned. This is also widely used, but the disadvantage is that the two parts are The hole and the hole position must be accurate, otherwise there is no way to install it.
The third type is the pin-fit shape. In order to locate the parts, a nail hole is made on one board, and a groove is made on the other board. The groove width and the pin diameter are equal, and they are matched.
The fourth is what we said above, the guide pins, Dowel pins ISO 2338 manufacturers tell you two positioning that can more effectively deal with activities.

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