Three and precision shaft on the shaft core
StandardAxle coreIt is a mechanical part that connects rotating parts. In the current mechanical field, parts are connected to each other to ensure the normal operation of large equipment. FixedAxle coreThe structure is different, the force is different, and the gear cooperation is also different, The installation method is also different.
Commonly usedAxle corePart material is35,45,50High quality carbon steel, which45Steel is the most widely used. suchQ235andQ255Such as ordinary carbon steel can also be used for shafts with less load or less importance. Alloy steel can be used for larger forces, limited axial size and weight or some special requirements.
Axle coremade of mild steel, such20Cr,20CrMnTi,20Mn2Bor38CrMoA1ACarburizing steel. After carburizing and quenching or nitriding treatment, these steels not only have high surface hardness, but also the core strength has been greatly improved, so they have good wear resistance, impact toughness and fatigue strength.
Ductile iron and high-strength cast iron are often used to make shaft cores with complex shapes because of their good casting properties and vibration damping properties. In particular, the rare earth magnesium ductile iron developed in China has good impact toughness, and has the advantages of reducing friction, vibration reduction and low sensitivity to stress concentration. It has been used in the manufacture of important axle core parts on automobiles, tractors and machine tools.
Axle coreThe formulation of process specifications for parts is directly related to the quality of the workpiece, labor productivity and economic benefits. Parts can be treated in several different ways, but only one is more reasonable. In the development of machining procedures, we must pay attention to the following points:
1.In the process analysis of part drawings, it is necessary to understand the technical requirements of part structure, accuracy, materials, heat treatment, etc., and to study product assembly drawings, part assembly drawings and acceptance standards.
2.The processing route of carburized parts is generally as follows: blanking → forging → normalizing → rough machining → semi-finishing → carburizing → decarburizing → quenching → threading, drilling or milling grooves → rough grinding → low temperature aging → semi-precision grinding → low temperature aging → fine grinding.
3.Selection of rough reference: If there is an unprocessed surface, the unprocessed surface should be selected as the rough reference. For cast shafts that need to be machined on all surfaces, please correct the surface according to the minimum machining allowance. And choose a flat and smooth surface to get out of the way of the gate. Choose a strong and reliable surface as a rough reference. At the same time, the rough reference cannot be reused.
4.Select precise datum: In order to comply with the principle of overlapping datum, please select the design datum or assembly datum as the positioning datum as much as possible, in line with the principle of datum consistency. Use the same positioning reference as much as possible, make the positioning reference consistent with the measurement reference as much as possible, and select a surface with high accuracy and stable and reliable installation as an accurate reference.
Axle core
Other Content
2024-01-02
Can meet your needs of a variety of materials!
WeChat Public Number
Address:
Foreign companies
Established：April 20, 1994