Chamfering is a term in mechanical engineering. In order to eliminate burrs on parts caused by machining and to facilitate the assembly of parts, chamfering is generally carried out at the end of the part. Chamfering is visible everywhere in our life, on cell phone frames, tempered doors, vases, etc.
Generally, the function of chamfering is to remove burrs and beautify them. However, chamfers specifically shown in the drawings are usually requirements for the installation process, such as the bearing installation guide. There are also arc chamfers (or arc transitions) that can also reduce stress concentration and strengthen the shaft. effect of the resistance of the typographic piece. Additionally, it can also make assembly easier, usually before processing is complete.
On agricultural machinery parts, especially the end faces of circular fittings and round holes, are often processed into chamfers of approximately 45°. These chamfers have many functions. They must be carefully checked and fully used during maintenance operations, otherwise it will cause many difficulties during the maintenance of agricultural machinery and even cause unexpected breakdowns. For example, before the molding process of small parts such as bolts, chamfering is also carried out to make it easier for the material to enter the mold.
What is the function of bearing chamfering?
1. Bearing steel should be chamfered during rough machining before heat treatment. This plays a very important role in releasing stress during heat treatment of the material, redistributing the internal organizational structure, reducing the risk of cracks and reducing deformation. Chamfering can solve the problem of stress concentration.
2. Chamfer and remove burrs so that the product is not sharp and cuts the user.
3. It plays a guiding and positioning role during assembly.
Usually, the outer chamfer of the outer ring of the bearing and the inner chamfer of the inner ring are rounded corners. In addition to effectively avoiding contact stress, the most important thing is to facilitate installation. Rounded corners ensure a good transition fit.
Especially during the rolling process, the corresponding positioning surface of the shaft and the shaft hole, that is, the shoulder of the shaft and the shoulder part of the bearing seat, the size of the chamfer of this part directly affects whether the bearing can be installed correctly.
In the picture above we can see that the bearing is installed between the axle box and the shaft. The chamfers are larger than the bearing housing chamfers and the shaft shoulder. The chamfer of the bearing must be larger than this arc to ensure. that the bearing fits the shaft towards the locating surface.
As shown in the figure above, when the chamfer of the bearing is smaller than the chamfer of the bearing housing and the shoulder of the shaft, it cannot be assembled in place, which can easily cause concentration of stresses at the bearing chamfer, tilting of the assembly and inability to match other mating parts.
Therefore, the chamfer adjustment should be fully considered during the bearing assembly process.
Daguang focuses on providing solutions such as precision CNC machining services (3-axis, 4-axis, 5-axis machining), CNC milling, 3D printing and rapid prototyping services.
